# JWT Class

Create, Sign, Encrypt, Verify and Decrypt JSON Web Tokens (JWTs).

## Syntax

```text
JWT
```

## Remarks

The JWT class supports signing, encrypting, decrypting and verifying JSON Web Tokens (JWTs).

Specify a set of claims via the **Claim*** properties or add your own claims with [AddClaim](#addclaim-method-jwt-class). Call [Sign](#sign-method-jwt-class) to create a signed JWT using a variety of signing algorithms including HMAC, RSA, and ECDSA. Use [Verify](#verify-method-jwt-class) to verify the signature of any received JWT. See [SigningAlgorithm](#signingalgorithm-property-jwt-class) for more details about supported algorithms.

Use [Encrypt](#encrypt-method-jwt-class) to create an encrypted JWT using a variety of algorithms including ECDH, RSA, and AES. Use [Decrypt](#decrypt-method-jwt-class) to decrypt the payload of any received JWT. See [EncryptionAlgorithm](#encryptionalgorithm-property-jwt-class) for more details about supported algorithms.

## Signing

The [Sign](#sign-method-jwt-class) method may be used to sign a payload with a variety of algorithms. Before calling the [Sign](#sign-method-jwt-class) method set [SigningAlgorithm](#signingalgorithm-property-jwt-class) to the algorithm which will be used to sign the message. The result of signing is a compact serialized JWT string. For instance:

*eyJhbGciOiJIUzI1NiJ9.eyJhdWQiOlsiYXVkaWVuY2UiXSwiaXNzIjoiaXNzdWVyIn0.mlFETSma4WUcUSjNSUWA1n9QBcQHCkHN-y4zeBsCVqI*

The class will use the values present in the **Claim*** properties to build the encoded JWT. After calling this method the [EncodedJWT](#encodedjwt-property-jwt-class) property will hold the compact serialized JWT. The following properties are applicable when calling this method:

- [SigningAlgorithm](#signingalgorithm-property-jwt-class) (required)
- [Certificate](#certificate-property-jwt-class) (conditional - required for ECDSA and RSA)
- [Key](#key-property-jwt-class) (conditional - required for HMAC)
- [ClaimAudience](#claimaudience-property-jwt-class)
- [ClaimExp](#claimexp-property-jwt-class)
- [ClaimIssuedAt](#claimissuedat-property-jwt-class)
- [ClaimIssuer](#claimissuer-property-jwt-class)
- [ClaimJWTId](#claimjwtid-property-jwt-class)
- [ClaimNotBefore](#claimnotbefore-property-jwt-class)
- [HeaderParams](#headerparams-property-jwt-class)
- [KeyId](#keyid-property-jwt-class)

**Notes for HMAC Algorithms (HS256, HS384, HS512)**

When [SigningAlgorithm](#signingalgorithm-property-jwt-class) is set to a HMAC algorithm [Key](#key-property-jwt-class) must be set to a key of appropriate length for the algorithm. The [Key](#key-property-jwt-class) should be the same number of bits as the algorithm being used. For instance a 256 bit key would be used for HS256.

The key must be known by both parties in order for signing and verification to take place. To use an existing HMAC key provide the bytes to the [Key](#key-property-jwt-class) property. For instance:

```csharp
//HMAC SHA-256 Key
byte[] key = new byte[] { 170, 171, 221, 209, 7, 181, 48, 178, 48, 118, 242, 132, 36, 218, 74, 140, 216, 165, 161, 70, 11, 42, 246, 205, 235, 231, 19, 48, 87, 141, 122, 10 };

//Sign the payload using HS256
Jwt jwt = new Jwt();
jwt.SigningAlgorithm = JwtSigningAlgorithms.saHS256;
jwt.ClaimAudience = "audience";
jwt.ClaimIssuer = "issuer";
jwt.ClaimExp = "1498508071";
jwt.KeyB = key;
jwt.Sign();

string signedData = jwt.EncodedJWT;
```

**Notes for RSA Algorithms (RS256, RS384, RS512, PS256, PS384, PS512)**

The RSA based algorithms use asymmetric encryption. Signing is done with a private key and verification is done with a public key. The private key may be in PFX or PEM format.

```csharp
Jwt jwt = new Jwt();
jwt.SigningAlgorithm = JwtSigningAlgorithms.saRS256;
jwt.Certificate = new Certificate(CertStoreTypes.cstPFXFile, "..\\jwt.pfx", "test", "*");
jwt.ClaimAudience = "audience";
jwt.ClaimIssuer = "issuer";
jwt.ClaimExp = "1498508071";
jwt.Sign();

string signedMessage = jwt.EncodedJWT;
```

**Notes for ECDSA Algorithms (ES256, ES384, ES512)**

ECDSA algorithms require a valid ECC private key in order to sign data. The [Certificate](#certificate-property-jwt-class) property should be set to a certificate with an ECC key. The [CertMgr](CertMgr.md#CertMgr) class can be used to create a certificate with an ECC key.

```csharp
//Create an ECC key with SHA-256
Certmgr mgr = new Certmgr();
mgr.Config("CertPublicKeyAlgorithm=ECDSA_P256");
mgr.CertStoreType = CertStoreTypes.cstPEMKeyFile;
mgr.CertStore = "C:\\temp\\ecdsa.pem";
mgr.CreateCertificate("CN=ecdsa", 123);

//Sign the payload using ES256
Jwt jwt = new Jwt();
jwt.SigningAlgorithm = JwtSigningAlgorithms.saES256;
jwt.Certificate = new Certificate(CertStoreTypes.cstPEMKeyFile, "C:\\temp\\ecdsa.pem", "", "*");
jwt.ClaimAudience = "audience";
jwt.ClaimIssuer = "issuer";
jwt.ClaimExp = "1498508071";
jwt.Sign();

string signedMessage = jwt.EncodedJWT;
```

**Notes for Unsecured (none)**

To create a JWS token without any security set [SigningAlgorithm](#signingalgorithm-property-jwt-class) to *jwtNone*.

```csharp
Jwt jwt = new Jwt();
jwt.SigningAlgorithm = JwtSigningAlgorithms.saNone;
jwt.ClaimAudience = "audience";
jwt.ClaimIssuer = "issuer";
jwt.ClaimExp = "1498508071";
jwt.Sign();

string unsecuredMessage = jwt.EncodedJWT;
```

## Signature Verification

The [Verify](#verify-method-jwt-class) method may be used to verify a received JWS message. Before calling the [Verify](#verify-method-jwt-class) method set [EncodedJWT](#encodedjwt-property-jwt-class) to a valid compact serialized JWT. For instance:

*eyJhbGciOiJIUzI1NiJ9.eyJhdWQiOlsiYXVkaWVuY2UiXSwiaXNzIjoiaXNzdWVyIn0.mlFETSma4WUcUSjNSUWA1n9QBcQHCkHN-y4zeBsCVqI*

The [Key](#key-property-jwt-class) or [SignerCert](#signercert-property-jwt-class) properties should be set to the HMAC key or public certificate respectively. If the correct [Key](#key-property-jwt-class) or [SignerCert](#signercert-property-jwt-class) is not known ahead of time the *KeyId* parameter of the [SignerInfo](#signerinfo-event-jwt-class) event may be used to identify the correct key.

If this method returns without error verification was successful. If verification fails then this method fails with an error. After calling this method the claims will be parsed and the **Claim*** properties will be populated. The the [HeaderParams](#headerparams-property-jwt-class) property will contain the headers. Headers of the parsed message are also available through the [HeaderParam](#headerparam-event-jwt-class) event.

The following properties are applicable when calling this method:

- [EncodedJWT](#encodedjwt-property-jwt-class) (required)
- [Key](#key-property-jwt-class) (conditional - required for HMAC)
- [SignerCert](#signercert-property-jwt-class) (conditional - required for ECDSA and RSA)
- [SigningAlgorithm](#signingalgorithm-property-jwt-class) (only if [StrictValidation](#StrictValidation) is True)
- [StrictValidation](#StrictValidation)
- [ExpectedAudience](#ExpectedAudience) (optional)
- [ExpectedExp](#ExpectedExp) (optional)
- [ExpectedIssuedAt](#ExpectedIssuedAt) (optional)
- [ExpectedIssuer](#ExpectedIssuer) (optional)
- [ExpectedJWTId](#ExpectedJWTId) (optional)
- [ExpectedNotBefore](#ExpectedNotBefore) (optional)
- [ExpectedSubject](#ExpectedSubject) (optional)

After calling this method the following properties are populated:

- [ClaimAudience](#claimaudience-property-jwt-class)
- [ClaimExp](#claimexp-property-jwt-class)
- [ClaimIssuedAt](#claimissuedat-property-jwt-class)
- [ClaimIssuer](#claimissuer-property-jwt-class)
- [ClaimJWTId](#claimjwtid-property-jwt-class)
- [ClaimNotBefore](#claimnotbefore-property-jwt-class)
- [ClaimSubject](#claimsubject-property-jwt-class)
- [HeaderParams](#headerparams-property-jwt-class)

**Notes for HMAC Algorithms (HS256, HS384, HS512)**

When verifying a message originally signed with a HMAC algorithm [Key](#key-property-jwt-class) must be set to the same key used during signing. The key must be known by both parties in order for signing and verification to take place.

```csharp
byte[] key = new byte[] { 170, 171, 221, 209, 7, 181, 48, 178, 48, 118, 242, 132, 36, 218, 74, 140, 216, 165, 161, 70, 11, 42, 246, 205, 235, 231, 19, 48, 87, 141, 122, 10 };

Jwt jwt = new Jwt();
jwt.KeyB = key;
jwt.EncodedJWT = signedData;
jwt.Verify();

string issuer = jwt.ClaimIssuer;
```

**Notes for RSA Algorithms (RS256, RS384, RS512, PS256, PS384, PS512)**

The RSA based algorithms use asymmetric encryption. Signing is done with a private key and verification is done with a public key. The public key is typically in PEM format.

```csharp
Jwt jwt = new Jwt();
jwt.SignerCert = new Certificate("..\\jwt.cer");
jwt.EncodedJWT = signedData;
jwt.Verify();

string issuer = jwt.ClaimIssuer;
```

**Notes for ECDSA Algorithms (ES256, ES384, ES512)**

ECDSA algorithms require a valid ECC public key to verify the message. The PEM encoded public key may be used directly with the [Certificate](#certificate-property-jwt-class) property. An example PEM encoded public certificate created by the [CertMgr](CertMgr.md#CertMgr) class:

```text
-----BEGIN CERTIFICATE-----
MIIBETCBtaADAgECAgF7MAwGCCqGSM49BAMCBQAwEDEOMAwGA1UEAxMFZWNkc2EwHhcNMjMw
NzAzMTcwMjU3WhcNMjQwNzAyMTcwMjU3WjAQMQ4wDAYDVQQDEwVlY2RzYTBZMBMGByqGSM49
AgEGCCqGSM49AwEHA0IABGJv251JI7ITcq+fac9Z2yYkhTLSRhWGzBw1wEJZbs/8AZbVmvcy
4BzKSZEaTfBsCHIt3FLNgRLdugI+B65eQDYwDAYIKoZIzj0EAwIFAANJADBGAiEAzmH5LKKn
r4iy9kJvIlCslpcBHM/8k0XQaj13Zwhm2ocCIQD/cSiC4EuqRkxT4IKET7ko3iI5YUS+J5W5
/0xnxxxIpQ==
-----END CERTIFICATE-----
```

```csharp
Jwt jwt = new Jwt();
jwt.SignerCert = new Certificate(CertStoreTypes.cstPublicKeyBlob, pubKey, "", "*");
jwt.EncodedJWT = signedData;
jwt.Verify();

string issuer = jwt.ClaimIssuer;
```

**Notes for Unsecured (none)**

To parse a JWS token without any security call the [Sign](#sign-method-jwt-class) method without setting the [Key](#key-property-jwt-class) or [Certificate](#certificate-property-jwt-class) properties.

```csharp
Jwt jwt = new Jwt();
jwt.EncodedJWT = signedData;
jwt.Verify();

string issuer = jwt.ClaimIssuer;
```

## Encrypting

The [Encrypt](#encrypt-method-jwt-class) method may be used to encrypt a payload with a variety of algorithms. To create an encrypted JWT JSON Web Encryption (JWE) is performed by first generating a random key used to encrypt the content. The content encryption key is used to encrypt the content using the algorithm specified by [ContentEncryptionAlgorithm](#contentencryptionalgorithm-property-jwt-class). The content encryption key is then encrypted itself using the algorithm specified by [EncryptionAlgorithm](#encryptionalgorithm-property-jwt-class). The content encryption key is not directly exposed in the API as it is randomly generated.

After calling this method the compact serialized JWT is written to [EncodedJWT](#encodedjwt-property-jwt-class). For instance:

*eyJhbGciOiJBMjU2S1ciLCJlbmMiOiJBMTI4Q0JDLUhTMjU2In0.4tcAnZJ00u4GY2kLOanPOL4CtvcfraZ8SIi6bOZ27qYBI2rHITPc1Q.c_9rCTdPn-saLCti2ZEyWQ.eLwqqo5BGNa70RlsvT-vTh7Gk0hjpJYY_9Zc39Vim_qEtjyMcxZygBpkfx9brzQr9rUbuiAhoCMXKip2-lKT6w.NkuLDPmWxWL4BaTWHWicIQ*

The class will use the values present in the **Claim*** properties to build the encoded JWT. After calling this method the [EncodedJWT](#encodedjwt-property-jwt-class) property will hold the compact serialized JWT. The following properties are applicable when calling this method:

- [EncryptionAlgorithm](#encryptionalgorithm-property-jwt-class) (required)
- [Key](#key-property-jwt-class) (conditional - required for AES)
- [KeyPassword](#keypassword-property-jwt-class) (conditional - required for PBES)
- [RecipientCert](#recipientcert-property-jwt-class) (conditional - required for ECDH and RSA)
- [ClaimAudience](#claimaudience-property-jwt-class)
- [ClaimExp](#claimexp-property-jwt-class)
- [ClaimIssuedAt](#claimissuedat-property-jwt-class)
- [ClaimIssuer](#claimissuer-property-jwt-class)
- [ClaimJWTId](#claimjwtid-property-jwt-class)
- [ClaimNotBefore](#claimnotbefore-property-jwt-class)
- [CompressionAlgorithm](#CompressionAlgorithm)
- [ContentEncryptionAlgorithm](#contentencryptionalgorithm-property-jwt-class)
- [HeaderParams](#headerparams-property-jwt-class)
- [KeyId](#keyid-property-jwt-class)

**Notes for AES Algorithms (A128KW, A192KW, A256KW, A128GCMKW, A192GCMKW, A256GCMKW)**

When [EncryptionAlgorithm](#encryptionalgorithm-property-jwt-class) is set to a AES algorithm [Key](#key-property-jwt-class) must be set to a key of appropriate length for the algorithm. For instance a 256 bit key would be used for A256KW.

To use an existing AES key provide the bytes to the [Key](#key-property-jwt-class) property. For instance:

```csharp
byte[] key = new byte[] { 164, 60, 194, 0, 161, 189, 41, 38, 130, 89, 141, 164, 45, 170, 159, 209, 69, 137, 243, 216, 191, 131, 47, 250, 32, 107, 231, 117, 37, 158, 225, 234 };

//Encrypt the payload using A256KW
Jwt jwt = new Jwt();
jwt.KeyB = key;
jwt.ClaimAudience = "audience";
jwt.ClaimIssuer = "issuer";
jwt.ClaimExp = "1498508071";
jwt.EncryptionAlgorithm = JwtEncryptionAlgorithms.eaA256KW;
jwt.Encrypt();

string encryptedData = jwt.EncodedJWT;
```

**Notes for RSA Algorithms (RSA1_5, RSA-OEAP, RSA-OAEP-256)**

The RSA based algorithms use asymmetric encryption. Encrypting is done with a public key and decryption is done with a private key. The public certificate should be in PEM (base64) format. For instance:

```csharp
Jwt jwt = new Jwt();
jwt.Certificate = new Certificate("..\\recipient.cer");
jwt.ClaimAudience = "audience";
jwt.ClaimIssuer = "issuer";
jwt.ClaimExp = "1498508071";
jwt.EncryptionAlgorithm = JwtEncryptionAlgorithms.eaRSA_OAEP;
jwt.Encrypt();

string encryptedData = jwt.EncodedJWT;
```

**Notes for ECDH Algorithms (ECDH-ES, ECDH-ES+A128KW, ECDH-ES+A192KW, ECDH-ES+A256KW)**

ECDH algorithms require a valid ECC public key to encrypt the message. If the key was originally created with the ECC class the PEM encoded *PublicKey* may be used directly with the [Certificate](#certificate-property-jwt-class) property. An example PEM encoded public certificate created by the ECC component:

```text
-----BEGIN PUBLIC KEY-----
MIIBMjCB7AYHKoZIzj0CATCB4AIBATAsBgcqhkjOPQEBAiEA/////wAAAAEAAAAAAAAAAAAA
AAD///////////////8wRAQg/////wAAAAEAAAAAAAAAAAAAAAD///////////////wEIFrG
NdiqOpPns+u9VXaYhrxlHQawzFOw9jvOPD4n0mBLBEEEaxfR8uEsQkf4vOblY6RA8ncDfYEt
6zOg9KE5RdiYwpZP40Li/hp/m47n60p8D54WK84zV2sxXs7LtkBoN79R9QIhAP////8AAAAA
//////////+85vqtpxeehPO5ysL8YyVRAgEBA0EEIC5rbLp11Mnz6cBXLLriaDIov3rm8RAY
x/OR0bOKiff0cQy+sLVaxjseqFk/+Xvl4ORSv5Z6HdHv5GyEpA0UoA==
-----END PUBLIC KEY-----
```

```csharp
Jwt jwt = new Jwt();
jwt.Certificate = new Certificate(CertStoreTypes.cstPublicKeyFile, pubKeyFile, "", "*");
jwt.ClaimAudience = "audience";
jwt.ClaimIssuer = "issuer";
jwt.ClaimExp = "1498508071";
jwt.EncryptionAlgorithm = JwtEncryptionAlgorithms.eaECDH_ES_A256KW;
jwt.Encrypt();

string encryptedData = jwt.EncodedJWT;
```

To use an ECC public key created by other means the ECC class may be used to import the key parameters. Populate the *Rx* and *Ry* properties of the ECC component first to obtain the PEM formatted public key. For instance:

```csharp
byte[] x_bytes = new byte[] { 171, 170, 196, 151, 94, 196, 231, 12, 128, 232, 17, 61, 45, 105, 41, 209, 192, 187, 112, 242, 110, 178, 95, 240, 36, 55, 83, 171, 190, 176, 78, 13 };
byte[] y_bytes = new byte[] { 197, 75, 134, 245, 245, 28, 199, 9, 7, 117, 1, 54, 49, 178, 135, 252, 62, 89, 35, 180, 117, 80, 231, 23, 110, 250, 28, 124, 219, 253, 224, 156 };

nsoftware.IPWorksEncrypt.Ecc ecc = new nsoftware.IPWorksEncrypt.Ecc();
ecc.Key.RxB = x_bytes;
ecc.Key.RyB = y_bytes;

string pubKey = ecc.Key.PublicKey;

Jwt jwt = new Jwt();
jwt.Certificate = new Certificate(CertStoreTypes.cstPublicKeyFile, pubKey, "", "*");
jwt.ClaimAudience = "audience";
jwt.ClaimIssuer = "issuer";
jwt.ClaimExp = "1498508071";
jwt.EncryptionAlgorithm = JwtEncryptionAlgorithms.eaECDH_ES_A256KW;
jwt.Encrypt();

string encryptedData = jwt.EncodedJWT;
```

**Notes for PBES Algorithms (PBES2-HS256+A128KW, PBES2-HS384+A192KW, PBES2-HS512+A256KW**

PBES algorithms derive a content encryption key from the [KeyPassword](#keypassword-property-jwt-class) property. Set [KeyPassword](#keypassword-property-jwt-class) to a shared secret.

```csharp
Jwt jwt = new Jwt();
jwt.KeyPassword = "secret";
jwt.ClaimAudience = "audience";
jwt.ClaimIssuer = "issuer";
jwt.ClaimExp = "1498508071";
jwt.EncryptionAlgorithm = JwtEncryptionAlgorithms.eaPBES2_HS512_A256KW;
jwt.Encrypt();

string encryptedData = jwt.EncodedJWT;
```

**Notes for Direct Shared Keys**

When [EncryptionAlgorithm](#encryptionalgorithm-property-jwt-class) is set to *Direct* the [Key](#key-property-jwt-class) property must be set to a valid symmetric key that will be used directly by the [ContentEncryptionAlgorithm](#contentencryptionalgorithm-property-jwt-class). In this case a content encryption key is not generated randomly, the [Key](#key-property-jwt-class) is used instead. The length of the specified [Key](#key-property-jwt-class) must be valid for the selected [ContentEncryptionAlgorithm](#contentencryptionalgorithm-property-jwt-class). For instance:

```csharp
byte[] key = new byte[] { 164, 62, 191, 60, 161, 189, 41, 38, 130, 89, 141, 164, 45, 170, 159, 209, 69, 137, 243, 216, 191, 131, 47, 250, 32, 107, 231, 117, 37, 158, 225, 234 };

Jwt jwt = new Jwt();
jwt.EncryptionAlgorithm = JwtEncryptionAlgorithms.eaDir;
jwt.ContentEncryptionAlgorithm = JwtContentEncryptionAlgorithms.ceaA256GCM;
jwt.KeyB = key;
jwt.ClaimAudience = "audience";
jwt.ClaimIssuer = "issuer";
jwt.ClaimExp = "1498508071";
jwt.Encrypt();

string encryptedData = jwt.EncodedJWT;
```

## Decrypting

The [Decrypt](#decrypt-method-jwt-class) method may be used to decrypt a received JWE message. Before calling the [Decrypt](#decrypt-method-jwt-class) method set [EncodedJWT](#encodedjwt-property-jwt-class) to a valid compact serialized JWT string. For instance:

```plaintext
eyJhbGciOiJBMjU2S1ciLCJlbmMiOiJBMTI4Q0JDLUhTMjU2In0.4tcAnZJ00u4GY2kLOanPOL4CtvcfraZ8SIi6bOZ27qYBI2rHITPc1Q.c_9rCTdPn-saLCti2ZEyWQ.eLwqqo5BGNa70RlsvT-vTh7Gk0hjpJYY_9Zc39Vim_qEtjyMcxZygBpkfx9brzQr9rUbuiAhoCMXKip2-lKT6w.NkuLDPmWxWL4BaTWHWicIQ
```

The type and format of the private key depends on the algorithm used to encrypt the data. The following table summarizes the relationship:

|  |  |
| --- | --- |
| Algorithm | Private Key Location |
| AES | [Key](#key-property-jwt-class) |
| RSA and ECDH | [Certificate](#certificate-property-jwt-class) |
| PBES | [KeyPassword](#keypassword-property-jwt-class) |

 If the correct [Key](#key-property-jwt-class) or [Certificate](#certificate-property-jwt-class) is not known ahead of time the *KeyId* parameter of the [RecipientInfo](#recipientinfo-event-jwt-class) event may be used to identify the correct key.

If this method returns without error decryption was successful. If decryption fails then this method fails with an error. After calling this method the payload will be present in the **Claim*** properties and the [HeaderParams](#headerparams-property-jwt-class) property will contain the headers. Headers of the parsed message are also available through the [HeaderParam](#headerparam-event-jwt-class) event.

The following properties are applicable when calling this method:

- [Certificate](#certificate-property-jwt-class) (conditional - required for RSA and ECDH)
- [EncodedJWT](#encodedjwt-property-jwt-class)
- [Key](#key-property-jwt-class) (conditional - required for AES)
- [ContentEncryptionAlgorithm](#contentencryptionalgorithm-property-jwt-class) (only if [StrictValidation](#StrictValidation) is True)
- [EncryptionAlgorithm](#encryptionalgorithm-property-jwt-class) (only if [StrictValidation](#StrictValidation) is True)
- [HeaderParams](#headerparams-property-jwt-class)
- [StrictValidation](#StrictValidation)

After calling this method the following properties are populated:

- [ClaimAudience](#claimaudience-property-jwt-class)
- [ClaimExp](#claimexp-property-jwt-class)
- [ClaimIssuedAt](#claimissuedat-property-jwt-class)
- [ClaimIssuer](#claimissuer-property-jwt-class)
- [ClaimJWTId](#claimjwtid-property-jwt-class)
- [ClaimNotBefore](#claimnotbefore-property-jwt-class)
- [ClaimSubject](#claimsubject-property-jwt-class)
- [HeaderParams](#headerparams-property-jwt-class)

**Notes for AES Algorithms (A128KW, A192KW, A256KW, A128GCMKW, A192GCMKW, A256GCMKW)**

To decrypt messages that use AES encryption [Key](#key-property-jwt-class) must be set to a key of appropriate length for the algorithm. For instance a 256 bit key would be used for A256KW.

The key must be known by both parties in order for encryption and decryption to take place.

```csharp
byte[] key = new byte[] { 164, 60, 194, 0, 161, 189, 41, 38, 130, 89, 141, 164, 45, 170, 159, 209, 69, 137, 243, 216, 191, 131, 47, 250, 32, 107, 231, 117, 37, 158, 225, 234 };

Jwt jwt = new Jwt();
jwt.KeyB = key;
jwt.EncodedJWT = encryptedData;
jwt.Decrypt();

string issuer = jwt.ClaimIssuer;
```

**Notes for RSA Algorithms (RSA1_5, RSA-OEAP, RSA-OAEP-256)**

The RSA based algorithms use asymmetric encryption. Encrypting is done with a public key and decryption is done with a private key. The certificate with private key must be specified. For instance:

```csharp
Jwt jwt = new Jwt();
jwt.Certificate = new Certificate(CertStoreTypes.cstPFXFile, "..\\jwt.pfx", "password", "*");
jwt.EncodedJWT = encryptedData;
jwt.Decrypt();

string issuer = jwt.ClaimIssuer;
```

**Notes for ECDH Algorithms (ECDH-ES, ECDH-ES+A128KW, ECDH-ES+A192KW, ECDH-ES+A256KW)**

ECDH algorithms require a valid ECC private key to decrypt the message. If the key was originally created with the ECC class the PEM encoded *PrivateKey* may be used directly with the [Certificate](#certificate-property-jwt-class) property.

```csharp
Jwt jwt = new Jwt();
jwt.Certificate = new Certificate(CertStoreTypes.cstPEMKeyFile, privKeyFile, "", "*");
jwt.EncodedJWT = encryptedData;
jwt.Decrypt();

string issuer = jwt.ClaimIssuer;
```

To use an ECC private key created by other means the ECC class may be used to import the key parameters. Populate the *Rx*, *Ry*, and *KB* properties of the ECC component first to obtain the PEM formatted public key. For instance:

```csharp
nsoftware.IPWorksEncrypt.Ecc ecc = new nsoftware.IPWorksEncrypt.Ecc();

byte[] x_bytes = new byte[] { 171, 170, 196, 151, 94, 196, 231, 12, 128, 232, 17, 61, 45, 105, 41, 209, 192, 187, 112, 242, 110, 178, 95, 240, 36, 55, 83, 171, 190, 176, 78, 13 };
byte[] y_bytes = new byte[] { 197, 75, 134, 245, 245, 28, 199, 9, 7, 117, 1, 54, 49, 178, 135, 252, 62, 89, 35, 180, 117, 80, 231, 23, 110, 250, 28, 124, 219, 253, 224, 156 };
byte[] k_bytes = new byte[] { 81, 65, 201, 24, 235, 249, 162, 148, 169, 150, 109, 181, 61, 238, 145, 122, 31, 30, 151, 94, 239, 90, 222, 217, 63, 103, 54, 2, 176, 232, 248, 168 };

ecc.Key.RxB = x_bytes;
ecc.Key.RyB = y_bytes;
ecc.Key.KB = k_bytes;

string privKey = ecc.Key.PrivateKey;

Jwt jwt = new Jwt();
jwt.Certificate = new Certificate(CertStoreTypes.cstPEMKeyBlob, privKey, "", "*");
jwt.EncodedJWT = encryptedData;
jwt.Decrypt();

string issuer = jwt.ClaimIssuer;
```

**Notes for PBES Algorithms (PBES2-HS256+A128KW, PBES2-HS384+A192KW, PBES2-HS512+A256KW**

PBES algorithms derive a content encryption key from the [KeyPassword](#keypassword-property-jwt-class) property. Set [KeyPassword](#keypassword-property-jwt-class) to the shared secret.

```csharp
Jwt jwt = new Jwt();
jwt.KeyPassword = "secret";
jwt.EncodedJWT = encryptedData;
jwt.Decrypt();

string issuer = jwt.ClaimIssuer;
```

**Notes for Direct Shared Keys**

When Direct encryption is used the [Key](#key-property-jwt-class) property must be set to a valid symmetric key that will be used directly by the [ContentEncryptionAlgorithm](#contentencryptionalgorithm-property-jwt-class). For instance:

```csharp
byte[] key = new byte[] { 164, 60, 194, 0, 161, 189, 41, 38, 130, 89, 141, 164, 45, 170, 159, 209, 69, 137, 243, 216, 191, 131, 47, 250, 32, 107, 231, 117, 37, 158, 225, 234 };

Jwt jwt = new Jwt();
jwt.KeyB = key;
jwt.EncodedJWT = encryptedData;
jwt.Decrypt();

string issuer = jwt.ClaimIssuer;
```

## Other Functionality

In addition to standard operations the class also supports a variety of other features including:

- Adding custom header parameters with [AddHeaderParam](#addheaderparam-method-jwt-class)
- Enforcing algorithm restrictions when verifying by setting [StrictValidation](#StrictValidation)
- Inspect the JWT without verifying or decrypting by calling [Parse](#parse-method-jwt-class)

## Property List

*The following is the full list of the properties of the class with short descriptions. Click on the links for further details.*

|  |  |
| --- | --- |
| [Certificate](#certificate-property-jwt-class) | The certificate used for signing or decrypting. |
| [ClaimAudience](#claimaudience-property-jwt-class) | The audience claim. |
| [ClaimExp](#claimexp-property-jwt-class) | The expiration time claim. |
| [ClaimIssuedAt](#claimissuedat-property-jwt-class) | The claim indicating the time at which the JWT was issued. |
| [ClaimIssuer](#claimissuer-property-jwt-class) | The issuer of the JWT. |
| [ClaimJWTId](#claimjwtid-property-jwt-class) | The unique identifier for the JWT. |
| [ClaimNotBefore](#claimnotbefore-property-jwt-class) | The claim identifying the time before which the JWT is invalid. |
| [Claims](#claims-property-jwt-class) | The claims in the JWT. |
| [ClaimSubject](#claimsubject-property-jwt-class) | The subject identifies the principal of the JWT. |
| [ContentEncryptionAlgorithm](#contentencryptionalgorithm-property-jwt-class) | The algorithm used to encrypt the content. |
| [EncodedJWT](#encodedjwt-property-jwt-class) | The encoded JWT. |
| [EncryptionAlgorithm](#encryptionalgorithm-property-jwt-class) | The key encryption algorithm. |
| [HeaderParams](#headerparams-property-jwt-class) | The JOSE header parameters. |
| [Key](#key-property-jwt-class) | The key used for AES. |
| [KeyId](#keyid-property-jwt-class) | The Id of the key used to sign or encrypt the message. |
| [KeyPassword](#keypassword-property-jwt-class) | The key password used in the PBES algorithm. |
| [RecipientCert](#recipientcert-property-jwt-class) | The certificate used for encryption. |
| [SignerCert](#signercert-property-jwt-class) | The certificate used for signature verification. |
| [SigningAlgorithm](#signingalgorithm-property-jwt-class) | The algorithm used when signing. |
| [SigningKey](#signingkey-property-jwt-class) | The key used for HMAC. |

## Method List

*The following is the full list of the methods of the class with short descriptions. Click on the links for further details.*

|  |  |
| --- | --- |
| [AddClaim](#addclaim-method-jwt-class) | Adds an new claim. |
| [AddHeaderParam](#addheaderparam-method-jwt-class) | Adds additional header parameters. |
| [Config](#config-method-jwt-class) | Sets or retrieves a configuration setting. |
| [Decrypt](#decrypt-method-jwt-class) | Decrypts the encoded JWT. |
| [DecryptAndVerify](#decryptandverify-method-jwt-class) | Decrypts the encoded JWT, and verifies the signature. |
| [Encrypt](#encrypt-method-jwt-class) | Encrypts the claims with the specified algorithms. |
| [Parse](#parse-method-jwt-class) | Parses the encoded JWT. |
| [Reset](#reset-method-jwt-class) | Resets the class properties. |
| [Sign](#sign-method-jwt-class) | Signs the payload with the specified algorithm. |
| [SignAndEncrypt](#signandencrypt-method-jwt-class) | Signs the payload with the specified algorithm, and encrypts the result of signing. |
| [Verify](#verify-method-jwt-class) | Verifies the signature of the encoded JWT. |

## Event List

*The following is the full list of the events fired by the class with short descriptions. Click on the links for further details.*

|  |  |
| --- | --- |
| [ClaimInfo](#claiminfo-event-jwt-class) | Fires once for each claim. |
| [Error](#error-event-jwt-class) | Fired when information is available about errors during data delivery. |
| [HeaderParam](#headerparam-event-jwt-class) | Fires once for each JOSE header parameter. |
| [RecipientInfo](#recipientinfo-event-jwt-class) | Fired with information about the recipient key of the encrypted message. |
| [SignerInfo](#signerinfo-event-jwt-class) | Fires with information about the signature. |

## Config Settings

*The following is a list of config settings for the class with short descriptions. Click on the links for further details.*

|  |  |
| --- | --- |
| [AllowedSigningAlgorithms](#AllowedSigningAlgorithms) | Allowed signing algorithms when StrictValidation is set to True. |
| [AudienceDelimiter](#AudienceDelimiter) | Defines the character to separate audience values. |
| [CompressionAlgorithm](#CompressionAlgorithm) | The compression algorithm to use. |
| [ExpectedAudience](#ExpectedAudience) | The expected audience claim. |
| [ExpectedExp](#ExpectedExp) | The expected expiration time claim. |
| [ExpectedIssuedAt](#ExpectedIssuedAt) | The expected time at which the JWT was issued. |
| [ExpectedIssuer](#ExpectedIssuer) | The expected issuer of the JWT. |
| [ExpectedJWTId](#ExpectedJWTId) | The expected unique identifier for the JWT. |
| [ExpectedNotBefore](#ExpectedNotBefore) | The expected claim identifying the time before which the JWT is invalid. |
| [ExpectedSubject](#ExpectedSubject) | The expected subject identifying the principal of the JWT. |
| [IncludeCertificateFormat](#IncludeCertificateFormat) | The certificate values to include in the signed message (if any). |
| [InputMessage](#InputMessage) | The raw input to process. |
| [IsEncrypted](#IsEncrypted) | Indicates whether the EncodedJWT is encrypted. |
| [IsSigned](#IsSigned) | Indicates whether the EncodedJWT is signed. |
| [IssuerCerts](#IssuerCerts) | A collection of issuer certificates used with IncludeCertificateFormat. |
| [KeyEncoding](#KeyEncoding) | The encoding of the Key value. |
| [OutputMessage](#OutputMessage) | The raw output of the operation. |
| [PartyUInfo](#PartyUInfo) | Information about the producer of the message. |
| [PartyVInfo](#PartyVInfo) | Information about the recipient of the message. |
| [PBES2Count](#PBES2Count) | The PBKDF2 iteration count. |
| [PBES2SaltLength](#PBES2SaltLength) | The salt input value length. |
| [RawHeader](#RawHeader) | Holds the raw JOSE header. |
| [StrictValidation](#StrictValidation) | Requires specific algorithms when processing. |
| [BuildInfo](#BuildInfo) | Information about the product's build. |
| [CodePage](#CodePage) | The system code page used for Unicode to Multibyte translations. |
| [LicenseInfo](#LicenseInfo) | Information about the current license. |
| [MaskSensitiveData](#MaskSensitiveData) | Whether sensitive data is masked in log messages. |
| [ProcessIdleEvents](#ProcessIdleEvents) | Whether the class uses its internal event loop to process events when the main thread is idle. |
| [SelectWaitMillis](#SelectWaitMillis) | The length of time in milliseconds the class will wait when DoEvents is called if there are no events to process. |
| [UseFIPSCompliantAPI](#UseFIPSCompliantAPI) | Tells the class whether or not to use FIPS certified APIs. |
| [UseInternalSecurityAPI](#UseInternalSecurityAPI) | Whether or not to use the system security libraries or an internal implementation. |

# Certificate Property ([JWT](#jwt-class) Class)

The certificate used for signing or decrypting.

## Syntax

```text
IPWorksEncryptCertificate* GetCertificate();
int SetCertificate(IPWorksEncryptCertificate* val);
```

## Remarks

This property specifies a certificate with private key.

When calling [Sign](#sign-method-jwt-class) and [SigningAlgorithm](#signingalgorithm-property-jwt-class) is set to an RSA or ECDSA algorithm this property must be set to a certificate with private key.

When calling [Decrypt](#decrypt-method-jwt-class) and the message was encrypted using an RSA or ECDH [EncryptionAlgorithm](#encryptionalgorithm-property-jwt-class) this property specifies the certificate with private key used to decrypt the message.

## Data Type

[IPWorksEncryptCertificate](#certificate-type)

# ClaimAudience Property ([JWT](#jwt-class) Class)

The audience claim.

## Syntax

```text
ANSI (Cross Platform)
char* GetClaimAudience();int SetClaimAudience(const char* lpszClaimAudience);

Unicode (Windows)
LPWSTR GetClaimAudience();INT SetClaimAudience(LPCWSTR lpszClaimAudience);
```

## Default Value

""

## Remarks

This property holds the audience claim. The audience claim identifies the recipients that the JWT is intended for. The values specified here are case sensitive.

Multiple audience values are supported and should be separated by a semicolon. See [AudienceDelimiter](#AudienceDelimiter) for details.

This property corresponds to the *aud* JSON property.

## Data Type

String

# ClaimExp Property ([JWT](#jwt-class) Class)

The expiration time claim.

## Syntax

```text
ANSI (Cross Platform)
char* GetClaimExp();int SetClaimExp(const char* lpszClaimExp);

Unicode (Windows)
LPWSTR GetClaimExp();INT SetClaimExp(LPCWSTR lpszClaimExp);
```

## Default Value

""

## Remarks

This property holds the expiration time claim. The expiration time claim identifies the expiration time on or after which the JWT must not be accepted. This value corresponds to the *exp* JSON property.

This value is represented as a numeric value containing the number of seconds since the epoch (January 1st 1970). For instance *1498599163*.

## Data Type

String

# ClaimIssuedAt Property ([JWT](#jwt-class) Class)

The claim indicating the time at which the JWT was issued.

## Syntax

```text
ANSI (Cross Platform)
char* GetClaimIssuedAt();int SetClaimIssuedAt(const char* lpszClaimIssuedAt);

Unicode (Windows)
LPWSTR GetClaimIssuedAt();INT SetClaimIssuedAt(LPCWSTR lpszClaimIssuedAt);
```

## Default Value

""

## Remarks

This property holds the time at which the JWT was issued. This value corresponds to the *iat* JSON property.

This value is represented as a numeric value containing the number of seconds since the epoch (January 1st 1970). For instance *1498599163*.

## Data Type

String

# ClaimIssuer Property ([JWT](#jwt-class) Class)

The issuer of the JWT.

## Syntax

```text
ANSI (Cross Platform)
char* GetClaimIssuer();int SetClaimIssuer(const char* lpszClaimIssuer);

Unicode (Windows)
LPWSTR GetClaimIssuer();INT SetClaimIssuer(LPCWSTR lpszClaimIssuer);
```

## Default Value

""

## Remarks

This property holds the issuer of the JWT. The value is a case-sensitive string.

This property corresponds to the *iss* JSON property.

## Data Type

String

# ClaimJWTId Property ([JWT](#jwt-class) Class)

The unique identifier for the JWT.

## Syntax

```text
ANSI (Cross Platform)
char* GetClaimJWTId();int SetClaimJWTId(const char* lpszClaimJWTId);

Unicode (Windows)
LPWSTR GetClaimJWTId();INT SetClaimJWTId(LPCWSTR lpszClaimJWTId);
```

## Default Value

""

## Remarks

This property holds the unique identifier for the JWT. The value is a case-sensitive string.

This property corresponds to the *jti* JSON property.

## Data Type

String

# ClaimNotBefore Property ([JWT](#jwt-class) Class)

The claim identifying the time before which the JWT is invalid.

## Syntax

```text
ANSI (Cross Platform)
char* GetClaimNotBefore();int SetClaimNotBefore(const char* lpszClaimNotBefore);

Unicode (Windows)
LPWSTR GetClaimNotBefore();INT SetClaimNotBefore(LPCWSTR lpszClaimNotBefore);
```

## Default Value

""

## Remarks

This property identifies the time before which the JWT is invalid. This value corresponds to the *nbf* JSON property.

This value is represented as a numeric value containing the number of seconds since the epoch (January 1st 1970). For instance *1498599163*.

## Data Type

String

# Claims Property ([JWT](#jwt-class) Class)

The claims in the JWT.

## Syntax

```text
IPWorksEncryptList<IPWorksEncryptJWTClaim>* GetClaims();
int SetClaims(IPWorksEncryptList<IPWorksEncryptJWTClaim>* val);
```

## Remarks

This property specifies the claims within the JWT. This may be populated before calling [Sign](#sign-method-jwt-class) or [Encrypt](#encrypt-method-jwt-class). This is populated with the parsed claims after calling [Verify](#verify-method-jwt-class), [Decrypt](#decrypt-method-jwt-class), or [Parse](#parse-method-jwt-class).

This property is not available at design time.

## Data Type

[IPWorksEncryptJWTClaim](#jwtclaim-type)

# ClaimSubject Property ([JWT](#jwt-class) Class)

The subject identifies the principal of the JWT.

## Syntax

```text
ANSI (Cross Platform)
char* GetClaimSubject();int SetClaimSubject(const char* lpszClaimSubject);

Unicode (Windows)
LPWSTR GetClaimSubject();INT SetClaimSubject(LPCWSTR lpszClaimSubject);
```

## Default Value

""

## Remarks

This property holds the subject which identifies the principal of the JWT. The value is a case-sensitive string.

This property corresponds to the *sub* JSON property.

## Data Type

String

# ContentEncryptionAlgorithm Property ([JWT](#jwt-class) Class)

The algorithm used to encrypt the content.

## Syntax

```text
ANSI (Cross Platform)
int GetContentEncryptionAlgorithm();int SetContentEncryptionAlgorithm(int iContentEncryptionAlgorithm);

Unicode (Windows)
INT GetContentEncryptionAlgorithm();INT SetContentEncryptionAlgorithm(INT iContentEncryptionAlgorithm);
```

## Possible Values

```text
CEA_A128CBC_HS256(0), CEA_A192CBC_HS384(1), CEA_A256CBC_HS512(2), CEA_A128GCM(3), CEA_A192GCM(4), CEA_A256GCM(5)
```

## Default Value

0

## Remarks

This property specifies the algorithm used to encrypt the content.

The following values are supported.

| Algorithm | Description |
| --- | --- |
| 0 (ceaA128CBC_HS256 - default) | AES_128_CBC_HMAC_SHA_256 authenticated encryption algorithm |
| 1 (ceaA192CBC_HS384) | AES_192_CBC_HMAC_SHA_384 authenticated encryption algorithm |
| 2 (ceaA256CBC_HS512) | AES_256_CBC_HMAC_SHA_512 authenticated encryption algorithm |
| 3 (ceaA128GCM) | AES GCM using 128-bit key |
| 4 (ceaA192GCM) | AES GCM using 192-bit key |
| 5 (ceaA256GCM) | AES GCM using 256-bit key |

## Data Type

Integer

# EncodedJWT Property ([JWT](#jwt-class) Class)

The encoded JWT.

## Syntax

```text
ANSI (Cross Platform)
char* GetEncodedJWT();int SetEncodedJWT(const char* lpszEncodedJWT);

Unicode (Windows)
LPWSTR GetEncodedJWT();INT SetEncodedJWT(LPCWSTR lpszEncodedJWT);
```

## Default Value

""

## Remarks

This property holds the encoded JWT. This is populated after calling [Sign](#sign-method-jwt-class) or [Encrypt](#encrypt-method-jwt-class).

This must be set to a valid JWT before calling [Verify](#verify-method-jwt-class), [Decrypt](#decrypt-method-jwt-class) or [Parse](#parse-method-jwt-class).

## Data Type

String

# EncryptionAlgorithm Property ([JWT](#jwt-class) Class)

The key encryption algorithm.

## Syntax

```text
ANSI (Cross Platform)
int GetEncryptionAlgorithm();int SetEncryptionAlgorithm(int iEncryptionAlgorithm);

Unicode (Windows)
INT GetEncryptionAlgorithm();INT SetEncryptionAlgorithm(INT iEncryptionAlgorithm);
```

## Possible Values

```text
EA_RSA1_5(0), EA_RSA_OAEP(1), EA_RSA_OAEP_256(2), EA_A128KW(3), EA_A192KW(4), EA_A256KW(5), EA_DIR(6), EA_ECDH_ES(7), EA_ECDH_ES_A128KW(8), EA_ECDH_ES_A192KW(9), EA_ECDH_ES_A256KW(10), EA_A128GCMKW(11), EA_A192GCMKW(12), EA_A256GCMKW(13), EA_PBES2_HS256_A128KW(14), EA_PBES2_HS384_A192KW(15), EA_PBES2_HS512_A256KW(16)
```

## Default Value

0

## Remarks

This property specifies the algorithm used to encrypt the randomly generated content encryption key.

When using an AES algorithm the [Key](#key-property-jwt-class) property must be specified. When using an RSA or ECDH algorithm the [RecipientCert](#recipientcert-property-jwt-class) property must be specified. When using a PBES algorithm the [KeyPassword](#keypassword-property-jwt-class) property must be specified;. Possible values are:

| Algorithm | Description | Key Location |
| --- | --- | --- |
| 0 (eaRSA1_5 - default) | RSAES-PKCS1-v1_5 | [Certificate](#certificate-property-jwt-class) |
| 1 (eaRSA_OAEP) | RSAES OAEP using default parameters | [Certificate](#certificate-property-jwt-class) |
| 2 (eaRSA_OAEP_256) | RSAES OAEP using SHA-256 and MGF1 with SHA-256 | [Certificate](#certificate-property-jwt-class) |
| 3 (eaA128KW) | AES Key Wrap with default initial using 128-bit key | [Key](#key-property-jwt-class) |
| 4 (eaA192KW) | AES Key Wrap with default initial using 192-bit key | [Key](#key-property-jwt-class) |
| 5 (eaA256KW) | AES Key Wrap with default initial using 256-bit key | [Key](#key-property-jwt-class) |
| 6 (eaDir) | Direct use of a shared symmetric key as the CEK | [Key](#key-property-jwt-class) |
| 7 (eaECDH_ES) | Elliptic Curve Ephemeral Static key agreement using Concat KDF | [Certificate](#certificate-property-jwt-class) |
| 8 (eaECDH_ES_A128KW) | ECDH-ES using Concat KDF and CEK wrapped with A128KW | [Certificate](#certificate-property-jwt-class) |
| 9 (eaECDH_ES_A192KW) | ECDH-ES using Concat KDF and CEK wrapped with A192KW | [Certificate](#certificate-property-jwt-class) |
| 10 (eaECDH_ES_A256KW) | ECDH-ES using Concat KDF and CEK wrapped with A256KW | [Certificate](#certificate-property-jwt-class) |
| 11 (eaA128GCMKW) | Key wrapping with AES GCM using 128-bit key | [Key](#key-property-jwt-class) |
| 12 (eaA192GCMKW) | Key wrapping with AES GCM using 192-bit key | [Key](#key-property-jwt-class) |
| 13 (eaA256GCMKW) | Key wrapping with AES GCM using 256-bit key | [Key](#key-property-jwt-class) |
| 14 (eaPBES2_HS256_A128KW) | PBES2 with HMAC SHA-256 and A128KW | [KeyPassword](#keypassword-property-jwt-class) |
| 15 (eaPBES2_HS384_A192KW) | PBES2 with HMAC SHA-384 and A192KW | [KeyPassword](#keypassword-property-jwt-class) |
| 16 (eaPBES2_HS512_A256KW) | PBES2 with HMAC SHA-512 and A256KW | [KeyPassword](#keypassword-property-jwt-class) |

When set to an ECDH algorithm the following settings are also applicable:

- [PartyUInfo](#PartyUInfo)
- [PartyVInfo](#PartyVInfo)

When set to a PBES algorithm the following settings are also applicable:

- [PBES2Count](#PBES2Count)
- [PBES2SaltLength](#PBES2SaltLength)

## Data Type

Integer

# HeaderParams Property ([JWT](#jwt-class) Class)

The JOSE header parameters.

## Syntax

```text
IPWorksEncryptList<IPWorksEncryptHeaderParam>* GetHeaderParams();
int SetHeaderParams(IPWorksEncryptList<IPWorksEncryptHeaderParam>* val);
```

## Remarks

This property specifies the JOSE header parameters. This may be populated before calling [Sign](#sign-method-jwt-class) or [Encrypt](#encrypt-method-jwt-class). This is populated with the parsed header values after calling [Verify](#verify-method-jwt-class), [Decrypt](#decrypt-method-jwt-class), or [Parse](#parse-method-jwt-class).

This property is not available at design time.

## Data Type

[IPWorksEncryptHeaderParam](#headerparam-type)

# Key Property ([JWT](#jwt-class) Class)

The key used for AES.

## Syntax

```text
ANSI (Cross Platform)
int GetKey(char* &lpKey, int &lenKey);int SetKey(const char* lpKey, int lenKey);

Unicode (Windows)
INT GetKey(LPSTR &lpKey, INT &lenKey);INT SetKey(LPCSTR lpKey, INT lenKey);
```

## Default Value

""

## Remarks

This property specifies the key used when encrypting with an AES algorithm.

**Encrypting**

When [EncryptionAlgorithm](#encryptionalgorithm-property-jwt-class) is set to an AES algorithm this property must hold the symmetric key used for encryption and decryption. The size of the key must match the size of the algorithm. For instance when selecting the algorithm *A256GCMKW* (AES 256) the size of the key must also be 256 bits (32 bytes).

In the case where [EncryptionAlgorithm](#encryptionalgorithm-property-jwt-class) is set to *Direct* this key is used directly with the algorithm specified by [ContentEncryptionAlgorithm](#contentencryptionalgorithm-property-jwt-class) and must be an appropriate size for the selected [ContentEncryptionAlgorithm](#contentencryptionalgorithm-property-jwt-class).

## Data Type

Binary String

# KeyId Property ([JWT](#jwt-class) Class)

The Id of the key used to sign or encrypt the message.

## Syntax

```text
ANSI (Cross Platform)
char* GetKeyId();int SetKeyId(const char* lpszKeyId);

Unicode (Windows)
LPWSTR GetKeyId();INT SetKeyId(LPCWSTR lpszKeyId);
```

## Default Value

""

## Remarks

This property optionally specifies the Id of the key used to sign the message.

Any string value may be supplied here to help the other party identify the key used to sign or encrypt the message. This may be set before calling the [Sign](#sign-method-jwt-class) or [Encrypt](#encrypt-method-jwt-class) method.

## Data Type

String

# KeyPassword Property ([JWT](#jwt-class) Class)

The key password used in the PBES algorithm.

## Syntax

```text
ANSI (Cross Platform)
char* GetKeyPassword();int SetKeyPassword(const char* lpszKeyPassword);

Unicode (Windows)
LPWSTR GetKeyPassword();INT SetKeyPassword(LPCWSTR lpszKeyPassword);
```

## Default Value

""

## Remarks

This property specifies the key password used to derive a key when using a PBES [EncryptionAlgorithm](#encryptionalgorithm-property-jwt-class).

This is only applicable to PBES algorithms and must be set before calling [Encrypt](#encrypt-method-jwt-class) or [Decrypt](#decrypt-method-jwt-class).

## Data Type

String

# RecipientCert Property ([JWT](#jwt-class) Class)

The certificate used for encryption.

## Syntax

```text
IPWorksEncryptCertificate* GetRecipientCert();
int SetRecipientCert(IPWorksEncryptCertificate* val);
```

## Remarks

When calling [Encrypt](#encrypt-method-jwt-class) and [EncryptionAlgorithm](#encryptionalgorithm-property-jwt-class) is set to an RSA or ECDH algorithm this property must be set to a public certificate of the recipient.

## Data Type

[IPWorksEncryptCertificate](#certificate-type)

# SignerCert Property ([JWT](#jwt-class) Class)

The certificate used for signature verification.

## Syntax

```text
IPWorksEncryptCertificate* GetSignerCert();
int SetSignerCert(IPWorksEncryptCertificate* val);
```

## Remarks

When calling [Verify](#verify-method-jwt-class) and the algorithm used is RSA or ECDSA this property must be set to the public certificate of the signer.

## Data Type

[IPWorksEncryptCertificate](#certificate-type)

# SigningAlgorithm Property ([JWT](#jwt-class) Class)

The algorithm used when signing.

## Syntax

```text
ANSI (Cross Platform)
int GetSigningAlgorithm();int SetSigningAlgorithm(int iSigningAlgorithm);

Unicode (Windows)
INT GetSigningAlgorithm();INT SetSigningAlgorithm(INT iSigningAlgorithm);
```

## Possible Values

```text
SA_HS256(0), SA_HS384(1), SA_HS512(2), SA_RS256(3), SA_RS384(4), SA_RS512(5), SA_ES256(6), SA_ES384(7), SA_ES512(8), SA_PS256(9), SA_PS384(10), SA_PS512(11), SA_ES256K(12), SA_NONE(99)
```

## Default Value

0

## Remarks

This property specifies the algorithm to use when signing.

When signing with an HMAC algorithm [Key](#key-property-jwt-class) must be specified. When an RSA or ECDSA algorithm is selected [Certificate](#certificate-property-jwt-class) must be set before calling [Sign](#sign-method-jwt-class) and [SignerCert](#signercert-property-jwt-class) must be set before calling [Verify](#verify-method-jwt-class). The following values are supported:

| Algorithm | Description | Private Key Location |
| --- | --- | --- |
| 0 (saHS256 - default) | HMAC using SHA-256 | [Key](#key-property-jwt-class) |
| 1 (saHS384) | HMAC using SHA-384 | [Key](#key-property-jwt-class) |
| 2 (saHS512) | HMAC using SHA-512 | [Key](#key-property-jwt-class) |
| 3 (saRS256) | RSASSA-PKCS1-v1_5 using SHA-256 | [Certificate](#certificate-property-jwt-class) |
| 4 (saRS384) | RSASSA-PKCS1-v1_5 using SHA-384 | [Certificate](#certificate-property-jwt-class) |
| 5 (saRS512) | RSASSA-PKCS1-v1_5 using SHA-512 | [Certificate](#certificate-property-jwt-class) |
| 6 (saPS256) | RSASSA-PSS using SHA-256 and MGF1 with SHA-256 | [Certificate](#certificate-property-jwt-class) |
| 7 (saPS384) | RSASSA-PSS using SHA-384 and MGF1 with SHA-384 | [Certificate](#certificate-property-jwt-class) |
| 8 (saPS512) | RSASSA-PSS using SHA-512 and MGF1 with SHA-512 | [Certificate](#certificate-property-jwt-class) |
| 9 (saES256) | ECDSA using P-256 and SHA-256 | [Certificate](#certificate-property-jwt-class) |
| 10 (saES384) | ECDSA using P-384 and SHA-384 | [Certificate](#certificate-property-jwt-class) |
| 11 (saES512) | ECDSA using P-521 and SHA-512 | [Certificate](#certificate-property-jwt-class) |
| 12 (saES256K) | ECDSA using secp256k1 curve and SHA-256 | [Certificate](#certificate-property-jwt-class) |
| 99 (saNone) | None (unprotected) | Not Applicable |

Note: This setting is also applicable when [StrictValidation](#StrictValidation) is enabled before calling [Verify](#verify-method-jwt-class).

## Data Type

Integer

# SigningKey Property ([JWT](#jwt-class) Class)

The key used for HMAC.

## Syntax

```text
ANSI (Cross Platform)
int GetSigningKey(char* &lpSigningKey, int &lenSigningKey);int SetSigningKey(const char* lpSigningKey, int lenSigningKey);

Unicode (Windows)
INT GetSigningKey(LPSTR &lpSigningKey, INT &lenSigningKey);INT SetSigningKey(LPCSTR lpSigningKey, INT lenSigningKey);
```

## Default Value

""

## Remarks

This property specifies the key used when signing with an HMAC algorithm.

**Signing**

This property is applicable when [SigningAlgorithm](#signingalgorithm-property-jwt-class) is set to an HMAC algorithm.

It is recommended that the length of the key be equal to or larger than the hash size of the algorithm. Use of keys shorter than the hash size is discouraged.

**Sizes (in bytes)**

|  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- |
|  | SHA1 | SHA224 | SHA256 | SHA384 | SHA512 | MD5 | RIPEMD160 |
| Recommended Key Size | 20 | 28 | 32 | 48 | 64 | 16 | 20 |
| Hash Size | 20 | 28 | 32 | 48 | 64 | 16 | 20 |
| Block Size | 64 | 64 | 64 | 128 | 128 | 64 | 64 |

**Key Length Details**

As mentioned above it is recommended to use a key size equal to the hash size. Use of keys larger than the hash size does not typically significantly increase the function strength. Keys of any length are technically valid however see the below processing rules to understand how keys of varying lengths are treated:

- If the key length is equal to the hash size (recommended) it is used without modification.
- If the key length is less than the hash size it is used without modification.
- If the key length is less than or equal to the block size it is used without modification.
- If the key length is larger than the block size it is first hashed with the same algorithm.

## Data Type

Binary String

# AddClaim Method ([JWT](#jwt-class) Class)

Adds an new claim.

## Syntax

```text
ANSI (Cross Platform)
int AddClaim(const char* lpszname, const char* lpszvalue, int idataType);

Unicode (Windows)
INT AddClaim(LPCWSTR lpszname, LPCWSTR lpszvalue, INT idataType);
```

## Remarks

This method adds a claim to the existing claims. Use this method to add claims that are not already supported directly via properties.

The *Name* parameter defines the name of the claim. The *Value* parameter is the value, represented as a string. The JSON data type of the value is defined by the *DataType* parameter. Possible DataType values are:

- 0 (Object)
- 1 (Array)
- 2 (String)
- 3 (Number)
- 4 (Bool)
- 5 (Null)

## Error Handling (C++)

This method returns a result code; *0* indicates success, while a non-zero error code indicates that this method encountered an error during its execution. If an error occurs, the *GetLastError()* method can be called to retrieve the associated error message. (Note: This method's result code can also be obtained by calling the *GetLastErrorCode()* method after it returns.)

# AddHeaderParam Method ([JWT](#jwt-class) Class)

Adds additional header parameters.

## Syntax

```text
ANSI (Cross Platform)
int AddHeaderParam(const char* lpszname, const char* lpszvalue, int idataType);

Unicode (Windows)
INT AddHeaderParam(LPCWSTR lpszname, LPCWSTR lpszvalue, INT idataType);
```

## Remarks

This method is used to add additional header parameters before calling [Encrypt](#encrypt-method-jwt-class) or [Sign](#sign-method-jwt-class).

The *Name* and *Value* parameters define the name and value of the parameter respectively. The *DataType* parameter specifies the JSON data type of the value. Possible values for *DataType* are:

- 0 (Object)
- 1 (Array)
- 2 (String)
- 3 (Number)
- 4 (Bool)
- 5 (Null)

**Signing**

To add additional parameters to the JOSE header use this method. For instance to create this header:

```text
{
	"alg": "HS256",
	"crit": [
		"myheader"
	],
	"myheader": "testvalue"
}
```

The following code can be used:

```csharp
byte[] key = new byte[] { 170, 171, 221, 209, 7, 181, 48, 178, 48, 118, 242, 132, 36, 218, 74, 140, 216, 165, 161, 70, 11, 42, 246, 205, 235, 231, 19, 48, 87, 141, 122, 10 };

//Sign the payload using HS256
Jwt jwt = new Jwt();
jwt.SigningAlgorithm = JwtSigningAlgorithms.saHS256;
jwt.ClaimAudience = "audience";
jwt.ClaimIssuer = "issuer";
jwt.ClaimExp = "1498508071";
jwt.AddHeaderParam("crit", "[\"myheader\"]", 1);
jwt.AddHeaderParam("myheader", "testvalue", 2);
jwt.KeyB = key;
jwt.Sign();

string signedData = jwt.EncodedJWT;
```

Note: when calling [Sign](#sign-method-jwt-class) the class will automatically add some headers based on properties that are set.

**Parameters Automatically Set:**

| Header Param | Property |
| --- | --- |
| alg | Algorithm |
| kid | [KeyId](#keyid-property-jwt-class) |

**Encrypting**

To add additional parameters to the JOSE header use this method. For instance to create this header:

```text
{
	"alg": "A256GCMKW",
	"enc": "A128CBC-HS256",
	"iv": "cPTXlBL7aMiv-Dnf",
	"tag": "r5tmS-tXmfFngrybpnnt5g",
	"crit": [
		"myheader"
	],
	"myheader": "testvalue"
}
```

The following code can be used:

```csharp
byte[] key = new byte[] { 164, 60, 194, 0, 161, 189, 41, 38, 130, 89, 141, 164, 45, 170, 159, 209, 69, 137, 243, 216, 191, 131, 47, 250, 32, 107, 231, 117, 37, 158, 225, 234 };

Jwt jwt = new Jwt();
jwt.KeyB = key;
jwt.ClaimAudience = "audience";
jwt.ClaimIssuer = "issuer";
jwt.ClaimExp = "1498508071";
jwt.AddHeaderParam("crit", "[\"myheader\"]",1);
jwt.AddHeaderParam("myheader", "testvalue",2);
jwt.EncryptionAlgorithm = JwtEncryptionAlgorithms.eaA256GCMKW;
jwt.Encrypt();

string encryptedData = jwt.EncodedJWT;
```

Note: When calling [Encrypt](#encrypt-method-jwt-class) the class will automatically add headers based on the selected [EncryptionAlgorithm](#encryptionalgorithm-property-jwt-class) and other properties that may be set.

**Parameters Automatically Set:**

| Header Param | Property |
| --- | --- |
| alg | [EncryptionAlgorithm](#encryptionalgorithm-property-jwt-class) |
| enc | [ContentEncryptionAlgorithm](#contentencryptionalgorithm-property-jwt-class) |
| kid | [KeyId](#keyid-property-jwt-class) |
| zip | [CompressionAlgorithm](#CompressionAlgorithm) |
| p2c | [PBES2Count](#PBES2Count) (PBES Algorithms Only) |
| apu | [PartyUInfo](#PartyUInfo) (ECDH Algorithms Only) |
| apv | [PartyVInfo](#PartyVInfo) (ECDH Algorithms Only) |
| iv | N/A - Automatically Generated (AES Algorithms Only) |
| tag | N/A - Automatically Generated (AES Algorithms Only) |
| p2s | N/A - Automatically Generated (PBES Algorithms Only) |
| epk | N/A - Automatically Generated (ECDH Algorithms Only) |

## Error Handling (C++)

This method returns a result code; *0* indicates success, while a non-zero error code indicates that this method encountered an error during its execution. If an error occurs, the *GetLastError()* method can be called to retrieve the associated error message. (Note: This method's result code can also be obtained by calling the *GetLastErrorCode()* method after it returns.)

# Config Method ([JWT](#jwt-class) Class)

Sets or retrieves a configuration setting.

## Syntax

```text
ANSI (Cross Platform)
char* Config(const char* lpszConfigurationString);

Unicode (Windows)
LPWSTR Config(LPCWSTR lpszConfigurationString);
```

## Remarks

Config is a generic method available in every class. It is used to set and retrieve [configuration settings](#config-settings-jwt-class) for the class.

These settings are similar in functionality to properties, but they are rarely used. In order to avoid "polluting" the property namespace of the class, access to these *internal properties* is provided through the Config method.

To set a configuration setting named *PROPERTY*, you must call *Config("PROPERTY=VALUE")*, where *VALUE* is the value of the setting expressed as a string. For boolean values, use the strings "True", "False", "0", "1", "Yes", or "No" (case does not matter).

To read (query) the value of a [configuration setting](#config-settings-jwt-class), you must call *Config("PROPERTY")*. The value will be returned as a string.

## Error Handling (C++)

This method returns a String value; after it returns, call the *GetLastErrorCode()* method to obtain its result code; *0* indicates success, while a non-zero error code indicates that this method encountered an error during its execution. If an error occurs, the *GetLastError()* method can be called to retrieve the associated error message.

# Decrypt Method ([JWT](#jwt-class) Class)

Decrypts the encoded JWT.

## Syntax

```text
ANSI (Cross Platform)
int Decrypt();

Unicode (Windows)
INT Decrypt();
```

## Remarks

This method decrypts the encoded JWT.

Before calling the Decrypt method set [EncodedJWT](#encodedjwt-property-jwt-class) to a valid compact serialized JWT string. For instance:

```plaintext
eyJhbGciOiJBMjU2S1ciLCJlbmMiOiJBMTI4Q0JDLUhTMjU2In0.4tcAnZJ00u4GY2kLOanPOL4CtvcfraZ8SIi6bOZ27qYBI2rHITPc1Q.c_9rCTdPn-saLCti2ZEyWQ.eLwqqo5BGNa70RlsvT-vTh7Gk0hjpJYY_9Zc39Vim_qEtjyMcxZygBpkfx9brzQr9rUbuiAhoCMXKip2-lKT6w.NkuLDPmWxWL4BaTWHWicIQ
```

The type and format of the private key depends on the algorithm used to encrypt the data. The following table summarizes the relationship:

|  |  |
| --- | --- |
| Algorithm | Private Key Location |
| AES | [Key](#key-property-jwt-class) |
| RSA and ECDH | [Certificate](#certificate-property-jwt-class) |
| PBES | [KeyPassword](#keypassword-property-jwt-class) |

 If the correct [Key](#key-property-jwt-class) or [Certificate](#certificate-property-jwt-class) is not known ahead of time the *KeyId* parameter of the [RecipientInfo](#recipientinfo-event-jwt-class) event may be used to identify the correct key.

If this method returns without error decryption was successful. If decryption fails then this method fails with an error. After calling this method the payload will be present in the **Claim*** properties and the [HeaderParams](#headerparams-property-jwt-class) property will contain the headers. Headers of the parsed message are also available through the [HeaderParam](#headerparam-event-jwt-class) event.

The following properties are applicable when calling this method:

- [Certificate](#certificate-property-jwt-class) (conditional - required for RSA and ECDH)
- [EncodedJWT](#encodedjwt-property-jwt-class)
- [Key](#key-property-jwt-class) (conditional - required for AES)
- [ContentEncryptionAlgorithm](#contentencryptionalgorithm-property-jwt-class) (only if [StrictValidation](#StrictValidation) is True)
- [EncryptionAlgorithm](#encryptionalgorithm-property-jwt-class) (only if [StrictValidation](#StrictValidation) is True)
- [HeaderParams](#headerparams-property-jwt-class)
- [StrictValidation](#StrictValidation)

After calling this method the following properties are populated:

- [ClaimAudience](#claimaudience-property-jwt-class)
- [ClaimExp](#claimexp-property-jwt-class)
- [ClaimIssuedAt](#claimissuedat-property-jwt-class)
- [ClaimIssuer](#claimissuer-property-jwt-class)
- [ClaimJWTId](#claimjwtid-property-jwt-class)
- [ClaimNotBefore](#claimnotbefore-property-jwt-class)
- [ClaimSubject](#claimsubject-property-jwt-class)
- [HeaderParams](#headerparams-property-jwt-class)

**Notes for AES Algorithms (A128KW, A192KW, A256KW, A128GCMKW, A192GCMKW, A256GCMKW)**

To decrypt messages that use AES encryption [Key](#key-property-jwt-class) must be set to a key of appropriate length for the algorithm. For instance a 256 bit key would be used for A256KW.

The key must be known by both parties in order for encryption and decryption to take place.

```csharp
byte[] key = new byte[] { 164, 60, 194, 0, 161, 189, 41, 38, 130, 89, 141, 164, 45, 170, 159, 209, 69, 137, 243, 216, 191, 131, 47, 250, 32, 107, 231, 117, 37, 158, 225, 234 };

Jwt jwt = new Jwt();
jwt.KeyB = key;
jwt.EncodedJWT = encryptedData;
jwt.Decrypt();

string issuer = jwt.ClaimIssuer;
```

**Notes for RSA Algorithms (RSA1_5, RSA-OEAP, RSA-OAEP-256)**

The RSA based algorithms use asymmetric encryption. Encrypting is done with a public key and decryption is done with a private key. The certificate with private key must be specified. For instance:

```csharp
Jwt jwt = new Jwt();
jwt.Certificate = new Certificate(CertStoreTypes.cstPFXFile, "..\\jwt.pfx", "password", "*");
jwt.EncodedJWT = encryptedData;
jwt.Decrypt();

string issuer = jwt.ClaimIssuer;
```

**Notes for ECDH Algorithms (ECDH-ES, ECDH-ES+A128KW, ECDH-ES+A192KW, ECDH-ES+A256KW)**

ECDH algorithms require a valid ECC private key to decrypt the message. If the key was originally created with the ECC class the PEM encoded *PrivateKey* may be used directly with the [Certificate](#certificate-property-jwt-class) property.

```csharp
Jwt jwt = new Jwt();
jwt.Certificate = new Certificate(CertStoreTypes.cstPEMKeyFile, privKeyFile, "", "*");
jwt.EncodedJWT = encryptedData;
jwt.Decrypt();

string issuer = jwt.ClaimIssuer;
```

To use an ECC private key created by other means the ECC class may be used to import the key parameters. Populate the *Rx*, *Ry*, and *KB* properties of the ECC component first to obtain the PEM formatted public key. For instance:

```csharp
nsoftware.IPWorksEncrypt.Ecc ecc = new nsoftware.IPWorksEncrypt.Ecc();

byte[] x_bytes = new byte[] { 171, 170, 196, 151, 94, 196, 231, 12, 128, 232, 17, 61, 45, 105, 41, 209, 192, 187, 112, 242, 110, 178, 95, 240, 36, 55, 83, 171, 190, 176, 78, 13 };
byte[] y_bytes = new byte[] { 197, 75, 134, 245, 245, 28, 199, 9, 7, 117, 1, 54, 49, 178, 135, 252, 62, 89, 35, 180, 117, 80, 231, 23, 110, 250, 28, 124, 219, 253, 224, 156 };
byte[] k_bytes = new byte[] { 81, 65, 201, 24, 235, 249, 162, 148, 169, 150, 109, 181, 61, 238, 145, 122, 31, 30, 151, 94, 239, 90, 222, 217, 63, 103, 54, 2, 176, 232, 248, 168 };

ecc.Key.RxB = x_bytes;
ecc.Key.RyB = y_bytes;
ecc.Key.KB = k_bytes;

string privKey = ecc.Key.PrivateKey;

Jwt jwt = new Jwt();
jwt.Certificate = new Certificate(CertStoreTypes.cstPEMKeyBlob, privKey, "", "*");
jwt.EncodedJWT = encryptedData;
jwt.Decrypt();

string issuer = jwt.ClaimIssuer;
```

**Notes for PBES Algorithms (PBES2-HS256+A128KW, PBES2-HS384+A192KW, PBES2-HS512+A256KW**

PBES algorithms derive a content encryption key from the [KeyPassword](#keypassword-property-jwt-class) property. Set [KeyPassword](#keypassword-property-jwt-class) to the shared secret.

```csharp
Jwt jwt = new Jwt();
jwt.KeyPassword = "secret";
jwt.EncodedJWT = encryptedData;
jwt.Decrypt();

string issuer = jwt.ClaimIssuer;
```

**Notes for Direct Shared Keys**

When Direct encryption is used the [Key](#key-property-jwt-class) property must be set to a valid symmetric key that will be used directly by the [ContentEncryptionAlgorithm](#contentencryptionalgorithm-property-jwt-class). For instance:

```csharp
byte[] key = new byte[] { 164, 60, 194, 0, 161, 189, 41, 38, 130, 89, 141, 164, 45, 170, 159, 209, 69, 137, 243, 216, 191, 131, 47, 250, 32, 107, 231, 117, 37, 158, 225, 234 };

Jwt jwt = new Jwt();
jwt.KeyB = key;
jwt.EncodedJWT = encryptedData;
jwt.Decrypt();

string issuer = jwt.ClaimIssuer;
```

## Error Handling (C++)

This method returns a result code; *0* indicates success, while a non-zero error code indicates that this method encountered an error during its execution. If an error occurs, the *GetLastError()* method can be called to retrieve the associated error message. (Note: This method's result code can also be obtained by calling the *GetLastErrorCode()* method after it returns.)

# DecryptAndVerify Method ([JWT](#jwt-class) Class)

Decrypts the encoded JWT, and verifies the signature.

## Syntax

```text
ANSI (Cross Platform)
int DecryptAndVerify();

Unicode (Windows)
INT DecryptAndVerify();
```

## Remarks

TBD.

## Error Handling (C++)

This method returns a result code; *0* indicates success, while a non-zero error code indicates that this method encountered an error during its execution. If an error occurs, the *GetLastError()* method can be called to retrieve the associated error message. (Note: This method's result code can also be obtained by calling the *GetLastErrorCode()* method after it returns.)

# Encrypt Method ([JWT](#jwt-class) Class)

Encrypts the claims with the specified algorithms.

## Syntax

```text
ANSI (Cross Platform)
int Encrypt();

Unicode (Windows)
INT Encrypt();
```

## Remarks

This method encrypts the claims using the specified algorithms.

To create an encrypted JWT JSON Web Encryption (JWE) is performed by first generating a random key used to encrypt the content. The content encryption key is used to encrypt the content using the algorithm specified by [ContentEncryptionAlgorithm](#contentencryptionalgorithm-property-jwt-class). The content encryption key is then encrypted itself using the algorithm specified by [EncryptionAlgorithm](#encryptionalgorithm-property-jwt-class). The content encryption key is not directly exposed in the API as it is randomly generated.

After calling this method the compact serialized JWT is written to [EncodedJWT](#encodedjwt-property-jwt-class). For instance:

*eyJhbGciOiJBMjU2S1ciLCJlbmMiOiJBMTI4Q0JDLUhTMjU2In0.4tcAnZJ00u4GY2kLOanPOL4CtvcfraZ8SIi6bOZ27qYBI2rHITPc1Q.c_9rCTdPn-saLCti2ZEyWQ.eLwqqo5BGNa70RlsvT-vTh7Gk0hjpJYY_9Zc39Vim_qEtjyMcxZygBpkfx9brzQr9rUbuiAhoCMXKip2-lKT6w.NkuLDPmWxWL4BaTWHWicIQ*

The class will use the values present in the **Claim*** properties to build the encoded JWT. After calling this method the [EncodedJWT](#encodedjwt-property-jwt-class) property will hold the compact serialized JWT. The following properties are applicable when calling this method:

- [EncryptionAlgorithm](#encryptionalgorithm-property-jwt-class) (required)
- [Key](#key-property-jwt-class) (conditional - required for AES)
- [KeyPassword](#keypassword-property-jwt-class) (conditional - required for PBES)
- [RecipientCert](#recipientcert-property-jwt-class) (conditional - required for ECDH and RSA)
- [ClaimAudience](#claimaudience-property-jwt-class)
- [ClaimExp](#claimexp-property-jwt-class)
- [ClaimIssuedAt](#claimissuedat-property-jwt-class)
- [ClaimIssuer](#claimissuer-property-jwt-class)
- [ClaimJWTId](#claimjwtid-property-jwt-class)
- [ClaimNotBefore](#claimnotbefore-property-jwt-class)
- [CompressionAlgorithm](#CompressionAlgorithm)
- [ContentEncryptionAlgorithm](#contentencryptionalgorithm-property-jwt-class)
- [HeaderParams](#headerparams-property-jwt-class)
- [KeyId](#keyid-property-jwt-class)

**Notes for AES Algorithms (A128KW, A192KW, A256KW, A128GCMKW, A192GCMKW, A256GCMKW)**

When [EncryptionAlgorithm](#encryptionalgorithm-property-jwt-class) is set to a AES algorithm [Key](#key-property-jwt-class) must be set to a key of appropriate length for the algorithm. For instance a 256 bit key would be used for A256KW.

To use an existing AES key provide the bytes to the [Key](#key-property-jwt-class) property. For instance:

```csharp
byte[] key = new byte[] { 164, 60, 194, 0, 161, 189, 41, 38, 130, 89, 141, 164, 45, 170, 159, 209, 69, 137, 243, 216, 191, 131, 47, 250, 32, 107, 231, 117, 37, 158, 225, 234 };

//Encrypt the payload using A256KW
Jwt jwt = new Jwt();
jwt.KeyB = key;
jwt.ClaimAudience = "audience";
jwt.ClaimIssuer = "issuer";
jwt.ClaimExp = "1498508071";
jwt.EncryptionAlgorithm = JwtEncryptionAlgorithms.eaA256KW;
jwt.Encrypt();

string encryptedData = jwt.EncodedJWT;
```

**Notes for RSA Algorithms (RSA1_5, RSA-OEAP, RSA-OAEP-256)**

The RSA based algorithms use asymmetric encryption. Encrypting is done with a public key and decryption is done with a private key. The public certificate should be in PEM (base64) format. For instance:

```csharp
Jwt jwt = new Jwt();
jwt.Certificate = new Certificate("..\\recipient.cer");
jwt.ClaimAudience = "audience";
jwt.ClaimIssuer = "issuer";
jwt.ClaimExp = "1498508071";
jwt.EncryptionAlgorithm = JwtEncryptionAlgorithms.eaRSA_OAEP;
jwt.Encrypt();

string encryptedData = jwt.EncodedJWT;
```

**Notes for ECDH Algorithms (ECDH-ES, ECDH-ES+A128KW, ECDH-ES+A192KW, ECDH-ES+A256KW)**

ECDH algorithms require a valid ECC public key to encrypt the message. If the key was originally created with the ECC class the PEM encoded *PublicKey* may be used directly with the [Certificate](#certificate-property-jwt-class) property. An example PEM encoded public certificate created by the ECC component:

```text
-----BEGIN PUBLIC KEY-----
MIIBMjCB7AYHKoZIzj0CATCB4AIBATAsBgcqhkjOPQEBAiEA/////wAAAAEAAAAAAAAAAAAA
AAD///////////////8wRAQg/////wAAAAEAAAAAAAAAAAAAAAD///////////////wEIFrG
NdiqOpPns+u9VXaYhrxlHQawzFOw9jvOPD4n0mBLBEEEaxfR8uEsQkf4vOblY6RA8ncDfYEt
6zOg9KE5RdiYwpZP40Li/hp/m47n60p8D54WK84zV2sxXs7LtkBoN79R9QIhAP////8AAAAA
//////////+85vqtpxeehPO5ysL8YyVRAgEBA0EEIC5rbLp11Mnz6cBXLLriaDIov3rm8RAY
x/OR0bOKiff0cQy+sLVaxjseqFk/+Xvl4ORSv5Z6HdHv5GyEpA0UoA==
-----END PUBLIC KEY-----
```

```csharp
Jwt jwt = new Jwt();
jwt.Certificate = new Certificate(CertStoreTypes.cstPublicKeyFile, pubKeyFile, "", "*");
jwt.ClaimAudience = "audience";
jwt.ClaimIssuer = "issuer";
jwt.ClaimExp = "1498508071";
jwt.EncryptionAlgorithm = JwtEncryptionAlgorithms.eaECDH_ES_A256KW;
jwt.Encrypt();

string encryptedData = jwt.EncodedJWT;
```

To use an ECC public key created by other means the ECC class may be used to import the key parameters. Populate the *Rx* and *Ry* properties of the ECC component first to obtain the PEM formatted public key. For instance:

```csharp
byte[] x_bytes = new byte[] { 171, 170, 196, 151, 94, 196, 231, 12, 128, 232, 17, 61, 45, 105, 41, 209, 192, 187, 112, 242, 110, 178, 95, 240, 36, 55, 83, 171, 190, 176, 78, 13 };
byte[] y_bytes = new byte[] { 197, 75, 134, 245, 245, 28, 199, 9, 7, 117, 1, 54, 49, 178, 135, 252, 62, 89, 35, 180, 117, 80, 231, 23, 110, 250, 28, 124, 219, 253, 224, 156 };

nsoftware.IPWorksEncrypt.Ecc ecc = new nsoftware.IPWorksEncrypt.Ecc();
ecc.Key.RxB = x_bytes;
ecc.Key.RyB = y_bytes;

string pubKey = ecc.Key.PublicKey;

Jwt jwt = new Jwt();
jwt.Certificate = new Certificate(CertStoreTypes.cstPublicKeyFile, pubKey, "", "*");
jwt.ClaimAudience = "audience";
jwt.ClaimIssuer = "issuer";
jwt.ClaimExp = "1498508071";
jwt.EncryptionAlgorithm = JwtEncryptionAlgorithms.eaECDH_ES_A256KW;
jwt.Encrypt();

string encryptedData = jwt.EncodedJWT;
```

**Notes for PBES Algorithms (PBES2-HS256+A128KW, PBES2-HS384+A192KW, PBES2-HS512+A256KW**

PBES algorithms derive a content encryption key from the [KeyPassword](#keypassword-property-jwt-class) property. Set [KeyPassword](#keypassword-property-jwt-class) to a shared secret.

```csharp
Jwt jwt = new Jwt();
jwt.KeyPassword = "secret";
jwt.ClaimAudience = "audience";
jwt.ClaimIssuer = "issuer";
jwt.ClaimExp = "1498508071";
jwt.EncryptionAlgorithm = JwtEncryptionAlgorithms.eaPBES2_HS512_A256KW;
jwt.Encrypt();

string encryptedData = jwt.EncodedJWT;
```

**Notes for Direct Shared Keys**

When [EncryptionAlgorithm](#encryptionalgorithm-property-jwt-class) is set to *Direct* the [Key](#key-property-jwt-class) property must be set to a valid symmetric key that will be used directly by the [ContentEncryptionAlgorithm](#contentencryptionalgorithm-property-jwt-class). In this case a content encryption key is not generated randomly, the [Key](#key-property-jwt-class) is used instead. The length of the specified [Key](#key-property-jwt-class) must be valid for the selected [ContentEncryptionAlgorithm](#contentencryptionalgorithm-property-jwt-class). For instance:

```csharp
byte[] key = new byte[] { 164, 62, 191, 60, 161, 189, 41, 38, 130, 89, 141, 164, 45, 170, 159, 209, 69, 137, 243, 216, 191, 131, 47, 250, 32, 107, 231, 117, 37, 158, 225, 234 };

Jwt jwt = new Jwt();
jwt.EncryptionAlgorithm = JwtEncryptionAlgorithms.eaDir;
jwt.ContentEncryptionAlgorithm = JwtContentEncryptionAlgorithms.ceaA256GCM;
jwt.KeyB = key;
jwt.ClaimAudience = "audience";
jwt.ClaimIssuer = "issuer";
jwt.ClaimExp = "1498508071";
jwt.Encrypt();

string encryptedData = jwt.EncodedJWT;
```

## Error Handling (C++)

This method returns a result code; *0* indicates success, while a non-zero error code indicates that this method encountered an error during its execution. If an error occurs, the *GetLastError()* method can be called to retrieve the associated error message. (Note: This method's result code can also be obtained by calling the *GetLastErrorCode()* method after it returns.)

# Parse Method ([JWT](#jwt-class) Class)

Parses the encoded JWT.

## Syntax

```text
ANSI (Cross Platform)
int Parse();

Unicode (Windows)
INT Parse();
```

## Remarks

This method parses, but does not verify the encoded JWT.

Take care when using this method as no verification or decryption is performed. This method may be helpful in cases where only header information is desired.

If verification or decryption is desired, use [Verify](#verify-method-jwt-class) or [Decrypt](#decrypt-method-jwt-class) instead. It is not necessary to call this method before calling [Verify](#verify-method-jwt-class) or [Decrypt](#decrypt-method-jwt-class). [Verify](#verify-method-jwt-class) or [Decrypt](#decrypt-method-jwt-class) will both parse and decrypt the message.

When calling this method the headers are parsed. The [HeaderParam](#headerparam-event-jwt-class) and [RecipientInfo](#recipientinfo-event-jwt-class) events will fire and the [HeaderParams](#headerparams-property-jwt-class) property will be populated.

If the message is signed (not encrypted) the claims will also be parsed and the **Claim*** properties will be populated.

## Error Handling (C++)

This method returns a result code; *0* indicates success, while a non-zero error code indicates that this method encountered an error during its execution. If an error occurs, the *GetLastError()* method can be called to retrieve the associated error message. (Note: This method's result code can also be obtained by calling the *GetLastErrorCode()* method after it returns.)

# Reset Method ([JWT](#jwt-class) Class)

Resets the class properties.

## Syntax

```text
ANSI (Cross Platform)
int Reset();

Unicode (Windows)
INT Reset();
```

## Remarks

This method resets all message and key properties to their default values.

## Error Handling (C++)

This method returns a result code; *0* indicates success, while a non-zero error code indicates that this method encountered an error during its execution. If an error occurs, the *GetLastError()* method can be called to retrieve the associated error message. (Note: This method's result code can also be obtained by calling the *GetLastErrorCode()* method after it returns.)

# Sign Method ([JWT](#jwt-class) Class)

Signs the payload with the specified algorithm.

## Syntax

```text
ANSI (Cross Platform)
int Sign();

Unicode (Windows)
INT Sign();
```

## Remarks

This method signs the claims specified by the **Claim*** properties with the specified [SigningAlgorithm](#signingalgorithm-property-jwt-class).

Before calling the Sign method set [SigningAlgorithm](#signingalgorithm-property-jwt-class) to the algorithm which will be used to sign the message. The result of signing is a compact serialized JWT string. For instance:

*eyJhbGciOiJIUzI1NiJ9.eyJhdWQiOlsiYXVkaWVuY2UiXSwiaXNzIjoiaXNzdWVyIn0.mlFETSma4WUcUSjNSUWA1n9QBcQHCkHN-y4zeBsCVqI*

The class will use the values present in the **Claim*** properties to build the encoded JWT. After calling this method the [EncodedJWT](#encodedjwt-property-jwt-class) property will hold the compact serialized JWT. The following properties are applicable when calling this method:

- [SigningAlgorithm](#signingalgorithm-property-jwt-class) (required)
- [Certificate](#certificate-property-jwt-class) (conditional - required for ECDSA and RSA)
- [Key](#key-property-jwt-class) (conditional - required for HMAC)
- [ClaimAudience](#claimaudience-property-jwt-class)
- [ClaimExp](#claimexp-property-jwt-class)
- [ClaimIssuedAt](#claimissuedat-property-jwt-class)
- [ClaimIssuer](#claimissuer-property-jwt-class)
- [ClaimJWTId](#claimjwtid-property-jwt-class)
- [ClaimNotBefore](#claimnotbefore-property-jwt-class)
- [HeaderParams](#headerparams-property-jwt-class)
- [KeyId](#keyid-property-jwt-class)

**Notes for HMAC Algorithms (HS256, HS384, HS512)**

When [SigningAlgorithm](#signingalgorithm-property-jwt-class) is set to a HMAC algorithm [Key](#key-property-jwt-class) must be set to a key of appropriate length for the algorithm. The [Key](#key-property-jwt-class) should be the same number of bits as the algorithm being used. For instance a 256 bit key would be used for HS256.

The key must be known by both parties in order for signing and verification to take place. To use an existing HMAC key provide the bytes to the [Key](#key-property-jwt-class) property. For instance:

```csharp
//HMAC SHA-256 Key
byte[] key = new byte[] { 170, 171, 221, 209, 7, 181, 48, 178, 48, 118, 242, 132, 36, 218, 74, 140, 216, 165, 161, 70, 11, 42, 246, 205, 235, 231, 19, 48, 87, 141, 122, 10 };

//Sign the payload using HS256
Jwt jwt = new Jwt();
jwt.SigningAlgorithm = JwtSigningAlgorithms.saHS256;
jwt.ClaimAudience = "audience";
jwt.ClaimIssuer = "issuer";
jwt.ClaimExp = "1498508071";
jwt.KeyB = key;
jwt.Sign();

string signedData = jwt.EncodedJWT;
```

**Notes for RSA Algorithms (RS256, RS384, RS512, PS256, PS384, PS512)**

The RSA based algorithms use asymmetric encryption. Signing is done with a private key and verification is done with a public key. The private key may be in PFX or PEM format.

```csharp
Jwt jwt = new Jwt();
jwt.SigningAlgorithm = JwtSigningAlgorithms.saRS256;
jwt.Certificate = new Certificate(CertStoreTypes.cstPFXFile, "..\\jwt.pfx", "test", "*");
jwt.ClaimAudience = "audience";
jwt.ClaimIssuer = "issuer";
jwt.ClaimExp = "1498508071";
jwt.Sign();

string signedMessage = jwt.EncodedJWT;
```

**Notes for ECDSA Algorithms (ES256, ES384, ES512)**

ECDSA algorithms require a valid ECC private key in order to sign data. The [Certificate](#certificate-property-jwt-class) property should be set to a certificate with an ECC key. The [CertMgr](CertMgr.md#CertMgr) class can be used to create a certificate with an ECC key.

```csharp
//Create an ECC key with SHA-256
Certmgr mgr = new Certmgr();
mgr.Config("CertPublicKeyAlgorithm=ECDSA_P256");
mgr.CertStoreType = CertStoreTypes.cstPEMKeyFile;
mgr.CertStore = "C:\\temp\\ecdsa.pem";
mgr.CreateCertificate("CN=ecdsa", 123);

//Sign the payload using ES256
Jwt jwt = new Jwt();
jwt.SigningAlgorithm = JwtSigningAlgorithms.saES256;
jwt.Certificate = new Certificate(CertStoreTypes.cstPEMKeyFile, "C:\\temp\\ecdsa.pem", "", "*");
jwt.ClaimAudience = "audience";
jwt.ClaimIssuer = "issuer";
jwt.ClaimExp = "1498508071";
jwt.Sign();

string signedMessage = jwt.EncodedJWT;
```

**Notes for Unsecured (none)**

To create a JWS token without any security set [SigningAlgorithm](#signingalgorithm-property-jwt-class) to *jwtNone*.

```csharp
Jwt jwt = new Jwt();
jwt.SigningAlgorithm = JwtSigningAlgorithms.saNone;
jwt.ClaimAudience = "audience";
jwt.ClaimIssuer = "issuer";
jwt.ClaimExp = "1498508071";
jwt.Sign();

string unsecuredMessage = jwt.EncodedJWT;
```

## Error Handling (C++)

This method returns a result code; *0* indicates success, while a non-zero error code indicates that this method encountered an error during its execution. If an error occurs, the *GetLastError()* method can be called to retrieve the associated error message. (Note: This method's result code can also be obtained by calling the *GetLastErrorCode()* method after it returns.)

# SignAndEncrypt Method ([JWT](#jwt-class) Class)

Signs the payload with the specified algorithm, and encrypts the result of signing.

## Syntax

```text
ANSI (Cross Platform)
int SignAndEncrypt();

Unicode (Windows)
INT SignAndEncrypt();
```

## Remarks

TBD.

## Error Handling (C++)

This method returns a result code; *0* indicates success, while a non-zero error code indicates that this method encountered an error during its execution. If an error occurs, the *GetLastError()* method can be called to retrieve the associated error message. (Note: This method's result code can also be obtained by calling the *GetLastErrorCode()* method after it returns.)

# Verify Method ([JWT](#jwt-class) Class)

Verifies the signature of the encoded JWT.

## Syntax

```text
ANSI (Cross Platform)
int Verify();

Unicode (Windows)
INT Verify();
```

## Remarks

This method verifies the signature of the encoded JWT.

Before calling the Verify method set [EncodedJWT](#encodedjwt-property-jwt-class) to a valid compact serialized JWT. For instance:

*eyJhbGciOiJIUzI1NiJ9.eyJhdWQiOlsiYXVkaWVuY2UiXSwiaXNzIjoiaXNzdWVyIn0.mlFETSma4WUcUSjNSUWA1n9QBcQHCkHN-y4zeBsCVqI*

The [Key](#key-property-jwt-class) or [SignerCert](#signercert-property-jwt-class) properties should be set to the HMAC key or public certificate respectively. If the correct [Key](#key-property-jwt-class) or [SignerCert](#signercert-property-jwt-class) is not known ahead of time the *KeyId* parameter of the [SignerInfo](#signerinfo-event-jwt-class) event may be used to identify the correct key.

If this method returns without error verification was successful. If verification fails then this method fails with an error. After calling this method the claims will be parsed and the **Claim*** properties will be populated. The the [HeaderParams](#headerparams-property-jwt-class) property will contain the headers. Headers of the parsed message are also available through the [HeaderParam](#headerparam-event-jwt-class) event.

The following properties are applicable when calling this method:

- [EncodedJWT](#encodedjwt-property-jwt-class) (required)
- [Key](#key-property-jwt-class) (conditional - required for HMAC)
- [SignerCert](#signercert-property-jwt-class) (conditional - required for ECDSA and RSA)
- [SigningAlgorithm](#signingalgorithm-property-jwt-class) (only if [StrictValidation](#StrictValidation) is True)
- [StrictValidation](#StrictValidation)
- [ExpectedAudience](#ExpectedAudience) (optional)
- [ExpectedExp](#ExpectedExp) (optional)
- [ExpectedIssuedAt](#ExpectedIssuedAt) (optional)
- [ExpectedIssuer](#ExpectedIssuer) (optional)
- [ExpectedJWTId](#ExpectedJWTId) (optional)
- [ExpectedNotBefore](#ExpectedNotBefore) (optional)
- [ExpectedSubject](#ExpectedSubject) (optional)

After calling this method the following properties are populated:

- [ClaimAudience](#claimaudience-property-jwt-class)
- [ClaimExp](#claimexp-property-jwt-class)
- [ClaimIssuedAt](#claimissuedat-property-jwt-class)
- [ClaimIssuer](#claimissuer-property-jwt-class)
- [ClaimJWTId](#claimjwtid-property-jwt-class)
- [ClaimNotBefore](#claimnotbefore-property-jwt-class)
- [ClaimSubject](#claimsubject-property-jwt-class)
- [HeaderParams](#headerparams-property-jwt-class)

**Notes for HMAC Algorithms (HS256, HS384, HS512)**

When verifying a message originally signed with a HMAC algorithm [Key](#key-property-jwt-class) must be set to the same key used during signing. The key must be known by both parties in order for signing and verification to take place.

```csharp
byte[] key = new byte[] { 170, 171, 221, 209, 7, 181, 48, 178, 48, 118, 242, 132, 36, 218, 74, 140, 216, 165, 161, 70, 11, 42, 246, 205, 235, 231, 19, 48, 87, 141, 122, 10 };

Jwt jwt = new Jwt();
jwt.KeyB = key;
jwt.EncodedJWT = signedData;
jwt.Verify();

string issuer = jwt.ClaimIssuer;
```

**Notes for RSA Algorithms (RS256, RS384, RS512, PS256, PS384, PS512)**

The RSA based algorithms use asymmetric encryption. Signing is done with a private key and verification is done with a public key. The public key is typically in PEM format.

```csharp
Jwt jwt = new Jwt();
jwt.SignerCert = new Certificate("..\\jwt.cer");
jwt.EncodedJWT = signedData;
jwt.Verify();

string issuer = jwt.ClaimIssuer;
```

**Notes for ECDSA Algorithms (ES256, ES384, ES512)**

ECDSA algorithms require a valid ECC public key to verify the message. The PEM encoded public key may be used directly with the [Certificate](#certificate-property-jwt-class) property. An example PEM encoded public certificate created by the [CertMgr](CertMgr.md#CertMgr) class:

```text
-----BEGIN CERTIFICATE-----
MIIBETCBtaADAgECAgF7MAwGCCqGSM49BAMCBQAwEDEOMAwGA1UEAxMFZWNkc2EwHhcNMjMw
NzAzMTcwMjU3WhcNMjQwNzAyMTcwMjU3WjAQMQ4wDAYDVQQDEwVlY2RzYTBZMBMGByqGSM49
AgEGCCqGSM49AwEHA0IABGJv251JI7ITcq+fac9Z2yYkhTLSRhWGzBw1wEJZbs/8AZbVmvcy
4BzKSZEaTfBsCHIt3FLNgRLdugI+B65eQDYwDAYIKoZIzj0EAwIFAANJADBGAiEAzmH5LKKn
r4iy9kJvIlCslpcBHM/8k0XQaj13Zwhm2ocCIQD/cSiC4EuqRkxT4IKET7ko3iI5YUS+J5W5
/0xnxxxIpQ==
-----END CERTIFICATE-----
```

```csharp
Jwt jwt = new Jwt();
jwt.SignerCert = new Certificate(CertStoreTypes.cstPublicKeyBlob, pubKey, "", "*");
jwt.EncodedJWT = signedData;
jwt.Verify();

string issuer = jwt.ClaimIssuer;
```

**Notes for Unsecured (none)**

To parse a JWS token without any security call the [Sign](#sign-method-jwt-class) method without setting the [Key](#key-property-jwt-class) or [Certificate](#certificate-property-jwt-class) properties.

```csharp
Jwt jwt = new Jwt();
jwt.EncodedJWT = signedData;
jwt.Verify();

string issuer = jwt.ClaimIssuer;
```

## Error Handling (C++)

This method returns a result code; *0* indicates success, while a non-zero error code indicates that this method encountered an error during its execution. If an error occurs, the *GetLastError()* method can be called to retrieve the associated error message. (Note: This method's result code can also be obtained by calling the *GetLastErrorCode()* method after it returns.)

# ClaimInfo Event ([JWT](#jwt-class) Class)

Fires once for each claim.

## Syntax

```text
ANSI (Cross Platform)
virtual int FireClaimInfo(JWTClaimInfoEventParams *e);
typedef struct {  const char *Name;  const char *Value;  int DataType;
  int reserved;
} JWTClaimInfoEventParams;

Unicode (Windows)
virtual INT FireClaimInfo(JWTClaimInfoEventParams *e);
typedef struct {  LPCWSTR Name;  LPCWSTR Value;  INT DataType;
  INT reserved;
} JWTClaimInfoEventParams;
```

## Remarks

When [Decrypt](#decrypt-method-jwt-class), [Verify](#verify-method-jwt-class) or [Parse](#parse-method-jwt-class) is called this event will fire once for each claim in the JWT.

*Name* is the name of the claim.

*Value* is the value of the claim.

*DataType* specifies the JSON data type of the value. Possible values are:

- 0 (Object)
- 1 (Array)
- 2 (String)
- 3 (Number)
- 4 (Bool)
- 5 (Null)

# Error Event ([JWT](#jwt-class) Class)

Fired when information is available about errors during data delivery.

## Syntax

```text
ANSI (Cross Platform)
virtual int FireError(JWTErrorEventParams *e);
typedef struct {  int ErrorCode;  const char *Description;
  int reserved;
} JWTErrorEventParams;

Unicode (Windows)
virtual INT FireError(JWTErrorEventParams *e);
typedef struct {  INT ErrorCode;  LPCWSTR Description;
  INT reserved;
} JWTErrorEventParams;
```

## Remarks

The Error event is fired in case of exceptional conditions during message processing. Normally the class fails with an error.

The *ErrorCode* parameter contains an error code, and the *Description* parameter contains a textual description of the error. For a list of valid error codes and their descriptions, please refer to the [Error Codes](#trappable-errors-jwt-class) section.

# HeaderParam Event ([JWT](#jwt-class) Class)

Fires once for each JOSE header parameter.

## Syntax

```text
ANSI (Cross Platform)
virtual int FireHeaderParam(JWTHeaderParamEventParams *e);
typedef struct {  const char *Name;  const char *Value;  int DataType;
  int reserved;
} JWTHeaderParamEventParams;

Unicode (Windows)
virtual INT FireHeaderParam(JWTHeaderParamEventParams *e);
typedef struct {  LPCWSTR Name;  LPCWSTR Value;  INT DataType;
  INT reserved;
} JWTHeaderParamEventParams;
```

## Remarks

When [Decrypt](#decrypt-method-jwt-class), [Verify](#verify-method-jwt-class) or [Parse](#parse-method-jwt-class) is called this event will fire once for each JOSE header parameter.

*Name* is the name of the parameter.

*Value* is the value of the parameter.

*DataType* specifies the JSON data type of the value. Possible values are:

- 0 (Object)
- 1 (Array)
- 2 (String)
- 3 (Number)
- 4 (Bool)
- 5 (Null)

# RecipientInfo Event ([JWT](#jwt-class) Class)

Fired with information about the recipient key of the encrypted message.

## Syntax

```text
ANSI (Cross Platform)
virtual int FireRecipientInfo(JWTRecipientInfoEventParams *e);
typedef struct {  const char *KeyId;  const char *Algorithm;
  int reserved;
} JWTRecipientInfoEventParams;

Unicode (Windows)
virtual INT FireRecipientInfo(JWTRecipientInfoEventParams *e);
typedef struct {  LPCWSTR KeyId;  LPCWSTR Algorithm;
  INT reserved;
} JWTRecipientInfoEventParams;
```

## Remarks

This event fires with information about the key used to encrypt the data. This may be used to help identify the [Key](#key-property-jwt-class) or [Certificate](#certificate-property-jwt-class) properties to load in order to decrypt the message. This event fires when [Decrypt](#decrypt-method-jwt-class) or [Parse](#parse-method-jwt-class) is called.

*KeyId* is the Id of the key as supplied by the entity that created the message. This may be empty.

*Algorithm* is the encryption algorithm used to encrypt the data.

# SignerInfo Event ([JWT](#jwt-class) Class)

Fires with information about the signature.

## Syntax

```text
ANSI (Cross Platform)
virtual int FireSignerInfo(JWTSignerInfoEventParams *e);
typedef struct {  const char *KeyId;  const char *Algorithm;
  int reserved;
} JWTSignerInfoEventParams;

Unicode (Windows)
virtual INT FireSignerInfo(JWTSignerInfoEventParams *e);
typedef struct {  LPCWSTR KeyId;  LPCWSTR Algorithm;
  INT reserved;
} JWTSignerInfoEventParams;
```

## Remarks

This event fires with information about the signature. This may be used to help identify the [Key](#key-property-jwt-class) or [Certificate](#certificate-property-jwt-class) properties to load in order to verify the signature. This event fires when [Verify](#verify-method-jwt-class) or [Parse](#parse-method-jwt-class) is called.

*KeyId* is the Id of the key as supplied by the signer that created the message. This may be empty.

*Algorithm* is the signature algorithm used to sign the message.

# Certificate Type

This is the digital certificate being used.

## Syntax

 *IPWorksEncryptCertificate* (declared in *ipworksencrypt.h*)

## Remarks

This type describes the current digital certificate. The certificate may be a public or private key. The fields are used to identify or select certificates.

The following fields are available:

- [EffectiveDate](#Certificate_f_EffectiveDate)

- [ExpirationDate](#Certificate_f_ExpirationDate)

- [ExtendedKeyUsage](#Certificate_f_ExtendedKeyUsage)

- [Fingerprint](#Certificate_f_Fingerprint)

- [FingerprintSHA1](#Certificate_f_FingerprintSHA1)

- [FingerprintSHA256](#Certificate_f_FingerprintSHA256)

- [Issuer](#Certificate_f_Issuer)

- [PrivateKey](#Certificate_f_PrivateKey)

- [PrivateKeyAvailable](#Certificate_f_PrivateKeyAvailable)

- [PrivateKeyContainer](#Certificate_f_PrivateKeyContainer)

- [PublicKey](#Certificate_f_PublicKey)

- [PublicKeyAlgorithm](#Certificate_f_PublicKeyAlgorithm)

- [PublicKeyLength](#Certificate_f_PublicKeyLength)

- [SerialNumber](#Certificate_f_SerialNumber)

- [SignatureAlgorithm](#Certificate_f_SignatureAlgorithm)

- [Store](#Certificate_f_Store)

- [StorePassword](#Certificate_f_StorePassword)

- [StoreType](#Certificate_f_StoreType)

- [SubjectAltNames](#Certificate_f_SubjectAltNames)

- [ThumbprintMD5](#Certificate_f_ThumbprintMD5)

- [ThumbprintSHA1](#Certificate_f_ThumbprintSHA1)

- [ThumbprintSHA256](#Certificate_f_ThumbprintSHA256)

- [Usage](#Certificate_f_Usage)

- [UsageFlags](#Certificate_f_UsageFlags)

- [Version](#Certificate_f_Version)

- [Subject](#Certificate_f_Subject)

- [Encoded](#Certificate_f_Encoded)

## Fields

 **EffectiveDate** *char* (read-only)*
*Default Value: ""*

The date on which this certificate becomes valid. Before this date, it is not valid. The date is localized to the system's time zone. The following example illustrates the format of an encoded date:

23-Jan-2000 15:00:00.

 **ExpirationDate** *char* (read-only)*
*Default Value: ""*

The date on which the certificate expires. After this date, the certificate will no longer be valid. The date is localized to the system's time zone. The following example illustrates the format of an encoded date:

23-Jan-2001 15:00:00.

 **ExtendedKeyUsage** *char* (read-only)*
*Default Value: ""*

A comma-delimited list of extended key usage identifiers. These are the same as ASN.1 object identifiers (OIDs).

 **Fingerprint** *char* (read-only)*
*Default Value: ""*

The hex-encoded, 16-byte MD5 fingerprint of the certificate. This property is primarily used for keys which do not have a corresponding X.509 public certificate, such as PEM keys that only contain a private key. It is commonly used for SSH keys.

The following example illustrates the format: *bc:2a:72:af:fe:58:17:43:7a:5f:ba:5a:7c:90:f7:02*

 **FingerprintSHA1** *char* (read-only)*
*Default Value: ""*

The hex-encoded, 20-byte SHA-1 fingerprint of the certificate. This property is primarily used for keys which do not have a corresponding X.509 public certificate, such as PEM keys that only contain a private key. It is commonly used for SSH keys.

The following example illustrates the format: *30:7b:fa:38:65:83:ff:da:b4:4e:07:3f:17:b8:a4:ed:80:be:ff:84*

 **FingerprintSHA256** *char* (read-only)*
*Default Value: ""*

The hex-encoded, 32-byte SHA-256 fingerprint of the certificate. This property is primarily used for keys which do not have a corresponding X.509 public certificate, such as PEM keys that only contain a private key. It is commonly used for SSH keys.

The following example illustrates the format: *6a:80:5c:33:a9:43:ea:b0:96:12:8a:64:96:30:ef:4a:8a:96:86:ce:f4:c7:be:10:24:8e:2b:60:9e:f3:59:53*

 **Issuer** *char* (read-only)*
*Default Value: ""*

The issuer of the certificate. This field contains a string representation of the name of the issuing authority for the certificate.

 **PrivateKey** *char* (read-only)*
*Default Value: ""*

The private key of the certificate (if available). The key is provided as PEM/Base64-encoded data.

NOTE: The [PrivateKey](#Certificate_f_PrivateKey) may be available but not exportable. In this case, [PrivateKey](#Certificate_f_PrivateKey) returns an empty string.

 **PrivateKeyAvailable** *int (read-only)*
*Default Value: FALSE*

Whether a [PrivateKey](#Certificate_f_PrivateKey) is available for the selected certificate. If [PrivateKeyAvailable](#Certificate_f_PrivateKeyAvailable) is True, the certificate may be used for authentication purposes (e.g., server authentication).

 **PrivateKeyContainer** *char* (read-only)*
*Default Value: ""*

The name of the [PrivateKey](#Certificate_f_PrivateKey) container for the certificate (if available). This functionality is available only on Windows platforms.

 **PublicKey** *char* (read-only)*
*Default Value: ""*

The public key of the certificate. The key is provided as PEM/Base64-encoded data.

 **PublicKeyAlgorithm** *char* (read-only)*
*Default Value: ""*

The textual description of the certificate's public key algorithm. The property contains either the name of the algorithm (e.g., "RSA" or "RSA_DH") or an object identifier (OID) string representing the algorithm.

 **PublicKeyLength** *int (read-only)*
*Default Value: 0*

The length of the certificate's public key (in bits). Common values are 512, 1024, and 2048.

 **SerialNumber** *char* (read-only)*
*Default Value: ""*

The serial number of the certificate encoded as a string. The number is encoded as a series of hexadecimal digits, with each pair representing a byte of the serial number.

 **SignatureAlgorithm** *char* (read-only)*
*Default Value: ""*

The text description of the certificate's signature algorithm. The property contains either the name of the algorithm (e.g., "RSA" or "RSA_MD5RSA") or an object identifier (OID) string representing the algorithm.

 **Store** *char**
*Default Value: "MY"*

The name of the certificate store for the client certificate.

The [StoreType](#Certificate_f_StoreType) field denotes the type of the certificate store specified by [Store](#Certificate_f_Store). If the store is password-protected, specify the password in [StorePassword](#Certificate_f_StorePassword).

[Store](#Certificate_f_Store) is used in conjunction with the [Subject](#Certificate_f_Subject) field to specify client certificates. If [Store](#Certificate_f_Store) has a value, and [Subject](#Certificate_f_Subject) or [Encoded](#Certificate_f_Encoded) is set, a search for a certificate is initiated. Please see the [Subject](#Certificate_f_Subject) field for details.

 Designations of certificate stores are platform dependent.

The following designations are the most common User and Machine certificate stores in Windows:

|  |  |
| --- | --- |
| MY | A certificate store holding personal certificates with their associated private keys. |
| CA | Certifying authority certificates. |
| ROOT | Root certificates. |

When the certificate store type is *cstPFXFile*, this property must be set to the name of the file. When the type is *cstPFXBlob*, the property must be set to the binary contents of a PFX file (i.e., PKCS#12 certificate store).

 **StorePassword** *char**
*Default Value: ""*

If the type of certificate store requires a password, this field is used to specify the password needed to open the certificate store.

 **StoreType** *int*
*Default Value: 0*

The type of certificate store for this certificate.

 The class supports both public and private keys in a variety of formats. When the *cstAuto* value is used, the class will automatically determine the type. This field can take one of the following values:

```csharp
sftp.SSHCert = new Certificate(CertStoreTypes.cstPKCS11,
                               @"C:\Program Files\OpenSC Project\OpenSC\pkcs11\opensc-pkcs11.dll",
                               "123456", // PIN
                               "CN=cert_subject");
sftp.SSHUser = "test";
sftp.SSHLogon("myhost", 22);
```

```csharp
certmgr.CertStoreType = CertStoreTypes.cstPKCS11;
certmgr.OnCertList += (s, e) => {
  secKeyBlob = e.CertEncoded;
};
certmgr.CertStore = @"C:\Program Files\OpenSC Project\OpenSC\pkcs11\opensc-pkcs11.dll";
certmgr.CertStorePassword = "123456"; // PIN
certmgr.ListStoreCertificates();

sftp.SSHCert = new Certificate(CertStoreTypes.cstPKCS11, secKeyBlob, "123456", "*");
sftp.SSHUser = "test";
sftp.SSHLogon("myhost", 22);
```

|  |  |
| --- | --- |
| 0 (cstUser - default) | For Windows, this specifies that the certificate store is a certificate store owned by the current user. NOTE: This store type is not available in Java. |
| 1 (cstMachine) | For Windows, this specifies that the certificate store is a machine store. NOTE: This store type is not available in Java. |
| 2 (cstPFXFile) | The certificate store is the name of a PFX (PKCS#12) file containing certificates. |
| 3 (cstPFXBlob) | The certificate store is a string (binary or Base64-encoded) representing a certificate store in PFX (PKCS#12) format. |
| 4 (cstJKSFile) | The certificate store is the name of a Java Key Store (JKS) file containing certificates. NOTE: This store type is only available in Java. |
| 5 (cstJKSBlob) | The certificate store is a string (binary or Base64-encoded) representing a certificate store in Java Key Store (JKS) format. NOTE: This store type is only available in Java. |
| 6 (cstPEMKeyFile) | The certificate store is the name of a PEM-encoded file that contains a private key and an optional certificate. |
| 7 (cstPEMKeyBlob) | The certificate store is a string (binary or Base64-encoded) that contains a private key and an optional certificate. |
| 8 (cstPublicKeyFile) | The certificate store is the name of a file that contains a PEM- or DER-encoded public key certificate. |
| 9 (cstPublicKeyBlob) | The certificate store is a string (binary or Base64-encoded) that contains a PEM- or DER-encoded public key certificate. |
| 10 (cstSSHPublicKeyBlob) | The certificate store is a string (binary or Base64-encoded) that contains an SSH-style public key. |
| 11 (cstP7BFile) | The certificate store is the name of a PKCS#7 file containing certificates. |
| 12 (cstP7BBlob) | The certificate store is a string (binary) representing a certificate store in PKCS#7 format. |
| 13 (cstSSHPublicKeyFile) | The certificate store is the name of a file that contains an SSH-style public key. |
| 14 (cstPPKFile) | The certificate store is the name of a file that contains a PPK (PuTTY Private Key). |
| 15 (cstPPKBlob) | The certificate store is a string (binary) that contains a PPK (PuTTY Private Key). |
| 16 (cstXMLFile) | The certificate store is the name of a file that contains a certificate in XML format. |
| 17 (cstXMLBlob) | The certificate store is a string that contains a certificate in XML format. |
| 18 (cstJWKFile) | The certificate store is the name of a file that contains a JWK (JSON Web Key). |
| 19 (cstJWKBlob) | The certificate store is a string that contains a JWK (JSON Web Key). |
| 21 (cstBCFKSFile) | The certificate store is the name of a file that contains a BCFKS (Bouncy Castle FIPS Key Store). NOTE: This store type is only available in Java and .NET. |
| 22 (cstBCFKSBlob) | The certificate store is a string (binary or Base64-encoded) representing a certificate store in BCFKS (Bouncy Castle FIPS Key Store) format. NOTE: This store type is only available in Java and .NET. |
| 23 (cstPKCS11) | The certificate is present on a physical security key accessible via a PKCS#11 interface. To use a security key, create a new [Certificate](#certificate-type) object and pass cstPKCS11 as the [StoreType](#Certificate_f_StoreType), the full path of the PKCS#11 DLL as the [Store](#Certificate_f_Store), and the PIN as the [StorePassword](#Certificate_f_StorePassword). Code Example. SSH Authentication with Security Key (without CertMgr): Alternatively, collect the necessary data using the [CertMgr](CertMgr.md#CertMgr) class by calling the [ListStoreCertificates](CertMgr.md#CertMgr_m_ListStoreCertificates) method after setting the corresponding properties accordingly. The certificate information returned in the [CertList](CertMgr.md#CertMgr_e_CertList) event's CertEncoded parameter may be saved for later use. When using a certificate obtained with this approach, pass the previously saved security key information as the [Store](#Certificate_f_Store) and set [StorePassword](#Certificate_f_StorePassword) to the PIN. Code Example. SSH Authentication with Security Key (with CertMgr): |
| 99 (cstAuto) | The store type is automatically detected from the input data. This setting may be used with both public and private keys and can detect any of the supported formats automatically. |

 **SubjectAltNames** *char* (read-only)*
*Default Value: ""*

Comma-separated lists of alternative subject names for the certificate.

 **ThumbprintMD5** *char* (read-only)*
*Default Value: ""*

The MD5 hash of the certificate. It is primarily used for X.509 certificates. If the hash does not already exist, it is automatically computed.

 **ThumbprintSHA1** *char* (read-only)*
*Default Value: ""*

The SHA-1 hash of the certificate. It is primarily used for X.509 certificates. If the hash does not already exist, it is automatically computed.

 **ThumbprintSHA256** *char* (read-only)*
*Default Value: ""*

The SHA-256 hash of the certificate. It is primarily used for X.509 certificates. If the hash does not already exist, it is automatically computed.

 **Usage** *char* (read-only)*
*Default Value: ""*

The text description of [UsageFlags](#Certificate_f_UsageFlags).

This value will be one or more of the following strings and will be separated by commas:

- Digital Signature
- Non-Repudiation
- Key Encipherment
- Data Encipherment
- Key Agreement
- Certificate Signing
- CRL Signing
- Encipher Only

If the provider is OpenSSL, the value is a comma-separated list of X.509 certificate extension names.

 **UsageFlags** *int (read-only)*
*Default Value: 0*

The flags that show intended use for the certificate. The value of [UsageFlags](#Certificate_f_UsageFlags) is a combination of the following flags:

|  |  |
| --- | --- |
| 0x80 | Digital Signature |
| 0x40 | Non-Repudiation |
| 0x20 | Key Encipherment |
| 0x10 | Data Encipherment |
| 0x08 | Key Agreement |
| 0x04 | Certificate Signing |
| 0x02 | CRL Signing |
| 0x01 | Encipher Only |

Please see the [Usage](#Certificate_f_Usage) field for a text representation of [UsageFlags](#Certificate_f_UsageFlags).

This functionality currently is not available when the provider is OpenSSL.

 **Version** *char* (read-only)*
*Default Value: ""*

The certificate's version number. The possible values are the strings "V1", "V2", and "V3".

 **Subject** *char**
*Default Value: ""*

The subject of the certificate used for client authentication.

This property must be set after all other certificate properties are set. When this property is set, a search is performed in the current certificate store to locate a certificate with a matching subject.

If a matching certificate is found, the field is set to the full subject of the matching certificate.

If an exact match is not found, the store is searched for subjects containing the value of the property.

If a match is still not found, the property is set to an empty string, and no certificate is selected.

The special value "*" picks a random certificate in the certificate store.

The certificate subject is a comma-separated list of distinguished name fields and values. For instance, "CN=www.server.com, OU=test, C=US, E=example@email.com". Common fields and their meanings are as follows:

| Field | Meaning |
| --- | --- |
| CN | Common Name. This is commonly a hostname like www.server.com. |
| O | Organization |
| OU | Organizational Unit |
| L | Locality |
| S | State |
| C | Country |
| E | Email Address |

If a field value contains a comma, it must be quoted.

 **Encoded** *char**
*Default Value: ""*

The certificate (PEM/Base64 encoded). This field is used to assign a specific certificate. The [Store](#Certificate_f_Store) and [Subject](#Certificate_f_Subject) fields also may be used to specify a certificate.

When [Encoded](#Certificate_f_Encoded) is set, a search is initiated in the current [Store](#Certificate_f_Store) for the private key of the certificate. If the key is found, [Subject](#Certificate_f_Subject) is updated to reflect the full subject of the selected certificate; otherwise, [Subject](#Certificate_f_Subject) is set to an empty string.

## Constructors

```text
Certificate()
```

 Creates a instance whose properties can be set.

```text
Certificate(const char* lpEncoded, int lenEncoded)
```

 Parses * Encoded * as an X.509 public key.

```text
Certificate(int iStoreType, const char* lpStore, int lenStore, const char* lpszStorePassword, const char* lpszSubject)
```

 * StoreType * identifies the type of certificate store to use. See for descriptions of the different certificate stores. * Store * is a byte array containing the certificate data. * StorePassword * is the password used to protect the store.

 After the store has been successfully opened, the component will attempt to find the certificate identified by * Subject * . This can be either a complete or a substring match of the X.509 certificate's subject Distinguished Name (DN). The * Subject * parameter can also take an MD5, SHA-1, or SHA-256 thumbprint of the certificate to load in a "Thumbprint=value" format.

# HeaderParam Type

The JOSE header parameter.

## Syntax

 *IPWorksEncryptHeaderParam* (declared in *ipworksencrypt.h*)

## Remarks

This type holds the JOSE header parameters. The fields define the name, value, and data type of the parameter.

The following fields are available:

- [DataType](#HeaderParam_f_DataType)

- [Name](#HeaderParam_f_Name)

- [Value](#HeaderParam_f_Value)

## Fields

 **DataType** *int*
*Default Value: 2*

The data type of the header parameter.

This field specifies the JSON type of the header parameter value. Possible values are:

- 0 (Object)
- 1 (Array)
- 2 (String)
- 3 (Number)
- 4 (Bool)
- 5 (Null)

 **Name** *char**
*Default Value: ""*

The header parameter name.

 **Value** *char**
*Default Value: ""*

The header parameter value.

## Constructors

```text
HeaderParam()
```

 Creates a new header parameter with no name or value.

```text
HeaderParam(const char* lpszName, const char* lpszValue)
```

 Creates a new header parameter. The DataType of the value will be a String.

```text
HeaderParam(const char* lpszName, const char* lpszValue, int iDataType)
```

 Creates a new header parameter with the specified DataType.

# JWTClaim Type

The claim within the JWT.

## Syntax

 *IPWorksEncryptJWTClaim* (declared in *ipworksencrypt.h*)

## Remarks

This type holds the claim information. The fields define the name, value, and data type of the claim value.

The following fields are available:

- [DataType](#JWTClaim_f_DataType)

- [Name](#JWTClaim_f_Name)

- [Value](#JWTClaim_f_Value)

## Fields

 **DataType** *int*
*Default Value: 2*

The data type of the claim value.

This field specifies the JSON type of the claim value. Possible values are:

- 0 (Object)
- 1 (Array)
- 2 (String)
- 3 (Number)
- 4 (Bool)
- 5 (Null)

 **Name** *char**
*Default Value: ""*

The claim name.

 **Value** *char**
*Default Value: ""*

The claim value.

## Constructors

```text
JWTClaim()
```

 Creates a new claim with no name or value.

```text
JWTClaim(const char* lpszName, const char* lpszValue)
```

 Create a new claim. The DataType of the value will be a String.

```text
JWTClaim(const char* lpszName, const char* lpszValue, int iDataType)
```

 Creates a new claim with the specified DataType.

# IPWorksEncryptList Type

## Syntax

 *IPWorksEncryptList<T>* (declared in *ipworksencrypt.h*)

## Remarks

 *IPWorksEncryptList* is a generic class that is used to hold a collection of objects of type *T*, where *T* is one of the custom types supported by the JWT class.

```text
int GetCount() {}
```

```text
int SetCount(int count) {}
```

```text
T* Get(int index) {}
```

```text
T* Set(int index, T* value) {}
```

|  |  |
| --- | --- |
| Methods |  |
| GetCount | This method returns the current size of the collection. |
| SetCount | This method sets the size of the collection. This method returns 0 if setting the size was successful; or -1 if the collection is ReadOnly. When adding additional objects to a collection call this method to specify the new size. Increasing the size of the collection preserves existing objects in the collection. |
| Get | This method gets the item at the specified position. The index parameter specifies the index of the item in the collection. This method returns NULL if an invalid index is specified. |
| Set | This method sets the item at the specified position. The index parameter specifies the index of the item in the collection that is being set. This method returns -1 if an invalid index is specified. Note: Objects created using the new operator must be freed using the delete operator; they will not be automatically freed by the class. |

# Config Settings ([JWT](#jwt-class) Class)

 The class accepts one or more of the following *configuration settings*. Configuration settings are similar in functionality to properties, but they are rarely used. In order to avoid "polluting" the property namespace of the class, access to these *internal properties* is provided through the [Config](#config-method-jwt-class) method.

### JWT Config Settings

**AllowedSigningAlgorithms**: Allowed signing algorithms when StrictValidation is set to True.This setting specifics a comma separated list of algorithms that are allowed when [StrictValidation](#StrictValidation) is set to *true*. This allows multiple signing algorithms to be considered acceptable during validation. This setting is only applicable when [StrictValidation](#StrictValidation) is set to *true*. Possible values:

- *HS256*
- *HS384*
- *HS512*
- *RS256*
- *RS384*
- *RS512*
- *ES256*
- *ES384*
- *ES512*
- *PS256*
- *PS384*
- *PS512*

Example value: *HS512,HS256*.

**AudienceDelimiter**: Defines the character to separate audience values.This setting specifies the character to used to separate multiple audience values. [ClaimAudience](#claimaudience-property-jwt-class) may contain multiple values. When multiple values are present they will be separated by this character. The default value is *;*.

When setting [ClaimAudience](#claimaudience-property-jwt-class) that contains multiple audiences specify multiple value separated by the character set here. For instance:

```csharp
jwt.ClaimAudience = "aud1;aud2";
```

**CompressionAlgorithm**: The compression algorithm to use.This setting specifies the compression algorithm to use (if any). If set the content will be compressed using the specified algorithm. Possible values are:

- 0 (none - default)
- 1 (deflate)

**ExpectedAudience**: The expected audience claim.This setting specifies the expected audience claim. When set prior to calling the [Verify](#verify-method-jwt-class) method, the component will compare the audience claim from the [EncodedJWT](#encodedjwt-property-jwt-class) with this value.

**ExpectedExp**: The expected expiration time claim.This setting specifies the expected expiration time claim. When set prior to calling the [Verify](#verify-method-jwt-class) method, the component will compare the expiration time claim from the [EncodedJWT](#encodedjwt-property-jwt-class) with this value.

**ExpectedIssuedAt**: The expected time at which the JWT was issued.This setting specifies the expected issued at claim. When set prior to calling the [Verify](#verify-method-jwt-class) method, the component will compare the issued at claim from the [EncodedJWT](#encodedjwt-property-jwt-class) with this value.

**ExpectedIssuer**: The expected issuer of the JWT.This setting specifies the expected issuer of the JWT. When set prior to calling the [Verify](#verify-method-jwt-class) method, the component will compare the issuer of the [EncodedJWT](#encodedjwt-property-jwt-class) with this value.

**ExpectedJWTId**: The expected unique identifier for the JWT.This setting specifies the expected ID of the JWT. When set prior to calling the [Verify](#verify-method-jwt-class) method, the component will compare the JWT ID of the [EncodedJWT](#encodedjwt-property-jwt-class) with this value.

**ExpectedNotBefore**: The expected claim identifying the time before which the JWT is invalid.This setting specifies the expected not before claim of the JWT. When set prior to calling the [Verify](#verify-method-jwt-class) method, the component will compare the not before of claim of the [EncodedJWT](#encodedjwt-property-jwt-class) with this value.

**ExpectedSubject**: The expected subject identifying the principal of the JWT.This setting specifies the expected subject claim of the JWT. When set prior to calling the [Verify](#verify-method-jwt-class) method, the component will compare the subject claim of the [EncodedJWT](#encodedjwt-property-jwt-class) with this value.

**IncludeCertificateFormat**: The certificate values to include in the signed message (if any).This setting specifies whether information about the [Certificate](#certificate-property-jwt-class) is included in the signed message. When specified, the value here determines the format of the included certificate information. The certificate information is included as a standard JWS header parameter.

Multiple formats may be included in the signed message. The value specified should be the binary 'OR' of one or more of the following values:

| Value | Description | JWS Header Param |
| --- | --- | --- |
| 0 (0x00 - default) | None |  |
| 1 (0x01) | X.509 Certificate Chain | x5c |
| 2 (0x02) | X.509 Certificate SHA-1 Thumbprint (Base64-URL encoded) | x5t |
| 4 (0x04) | X.509 Certificate SHA-256 Thumbprint (Base64-URL encoded) | x5t#S256 |

Note: When including the certificate chain (*0x01*) the public certificate of [Certificate](#certificate-property-jwt-class) property will automatically be included. [IssuerCerts](#IssuerCerts) may also be set to the public issuer certificates that will be used when building the chain to include.

For instance, to include both the certificate chain and SHA-256 thumbprint of the [Certificate](#certificate-property-jwt-class) set this to *5*.

**InputMessage**: The raw input to process.This setting optionally specifies the pay payload to process. When calling [Sign](#sign-method-jwt-class) or [Encrypt](#encrypt-method-jwt-class) input is taken from this setting if specified. If a value is set here the **Claim*** properties are ignored.

**IsEncrypted**: Indicates whether the EncodedJWT is encrypted.This setting may be queried after calling [Parse](#parse-method-jwt-class) to determine if the [EncodedJWT](#encodedjwt-property-jwt-class) is encrypted.

**IsSigned**: Indicates whether the EncodedJWT is signed.This setting may be queried after calling [Parse](#parse-method-jwt-class) to determine if the [EncodedJWT](#encodedjwt-property-jwt-class) is signed.

**IssuerCerts**: A collection of issuer certificates used with IncludeCertificateFormat.This setting optionally specifies one or more issuer certificates that may be used by the class when [IncludeCertificateFormat](#IncludeCertificateFormat) is specified. Note that the issuer certificates specified here are used as a store of potential issuer certificates. At runtime the class will inspect the [Certificate](#certificate-property-jwt-class) value and add the relevant issuer certificates that are present in this property.

The format of the value must be one or more PEM encoded certificates with headers and footers. For instance to include 2 issuer certificates the value may be:

```text
-----BEGIN CERTIFICATE-----
MIIBujCCASOgAwIBAgICA+kwDQYJKoZIhvcNAQELBQAwHTEbMBkGA1UEAxMSbnVuaXRDZXJ0
Q2hhaW5Sb290MCAXDTE4MTAxNTA5MDAxN1oYDzIxMTgwOTIxMDkwMDE3WjAmMSQwIgYDVQQD
...
Tr+wi0ouNo7ifWRcE83Z15PhfGn1nkfxMYj4rya5n+V0RVVcgFUdiolCI5o/sYq503a7kH16
JSF5Zw+TiMz/COM8R94=
-----END CERTIFICATE-----

-----BEGIN CERTIFICATE-----
MIIBsTCCARqgAwIBAgICA+gwDQYJKoZIhvcNAQELBQAwHTEbMBkGA1UEAxMSbnVuaXRDZXJ0
Q2hhaW5Sb290MCAXDTE4MTAxNTA5MDAxN1oYDzIxMTgwOTIxMDkwMDE3WjAdMRswGQYDVQQD
...
5u2K9PuJ3ySgL7AvYsqbB/e0/gw8j253SOU+gNTpFahOJsLGEJ43CRtaowkLnWEzs+OPnRfw
iQmqruw=
-----END CERTIFICATE-----
```

**KeyEncoding**: The encoding of the Key value.This setting specifies the encoding that has been applied to the [Key](#key-property-jwt-class). value prior to providing it to the class. The [Key](#key-property-jwt-class) is typically represented as an array of bytes, however in some cases the key value may have been encoded. As a matter of convenience the class will accept the key with an encoding already applied. The class will decode the key value according the to the value specified here before processing. Possible values are:

- 0 (none - default)
- 1 (Base64)
- 2 (Hex)
- 3 (Base64URL)

**OutputMessage**: The raw output of the operation.After calling [Verify](#verify-method-jwt-class) or [Decrypt](#decrypt-method-jwt-class) this holds the raw JSON payload. This may be useful for debugging or logging purposes when the JSON payload is desired.

**PartyUInfo**: Information about the producer of the message.This setting may optionally be set when Algorithm is set to an ECDH algorithm before calling [Encrypt](#encrypt-method-jwt-class). When calling [Decrypt](#decrypt-method-jwt-class) this setting is populated and also accessible from within the [RecipientInfo](#recipientinfo-event-jwt-class) event. The value may be any string. To specify a base64url encoded value directly prefix the string with *[b64]*. For instance the following lines both set the same value:

```csharp
jwe.Config("PartyUInfo=Alice");
jwe.Config("PartyUInfo=[b64]QWxpY2U="); //Equivalent to above line
```

**PartyVInfo**: Information about the recipient of the message.This setting may optionally be set when Algorithm is set to an ECDH algorithm before calling [Encrypt](#encrypt-method-jwt-class). When calling [Decrypt](#decrypt-method-jwt-class) this setting is populated and also accessible from within the [RecipientInfo](#recipientinfo-event-jwt-class) event. The value may be any string. To specify a base64url encoded value directly prefix the string with *[b64]*. For instance the following lines both set the same value:

```csharp
jwe.Config("PartyUInfo=Bob");
jwe.Config("PartyUInfo=[b64]Qm9i"); //Equivalent to above line
```

**PBES2Count**: The PBKDF2 iteration count.This setting specifies the PBDKF2 iteration count. A minimum value of *1000* is recommended. The default value is *1000*.

This setting is only applicable when [EncryptionAlgorithm](#encryptionalgorithm-property-jwt-class) is set to a PBES algorithm.

**PBES2SaltLength**: The salt input value length.This setting specifies the length in bytes of the salt input value, which is used as part of the PBKDF2 salt value. The default value is *16*.

This setting is only applicable when [EncryptionAlgorithm](#encryptionalgorithm-property-jwt-class) is set to a PBES algorithm.

**RawHeader**: Holds the raw JOSE header.This setting may be queried after calling [Sign](#sign-method-jwt-class) or [Verify](#verify-method-jwt-class) to obtain the raw JOSE header. This returns a JSON string like:

*{"alg":"ES384","kid":"myKeyId"}*

**StrictValidation**: Requires specific algorithms when processing.If set to True the class will validate that the algorithm used in the JWT matches the values specified in [EncryptionAlgorithm](#encryptionalgorithm-property-jwt-class), [ContentEncryptionAlgorithm](#contentencryptionalgorithm-property-jwt-class), and [SigningAlgorithm](#signingalgorithm-property-jwt-class). This is applicable when calling [Decrypt](#decrypt-method-jwt-class) and [Verify](#verify-method-jwt-class).

By default this is False and the algorithms are read automatically from the encoded JWT.

### Base Config Settings

**BuildInfo**: Information about the product's build.When queried, this setting will return a string containing information about the product's build.

**CodePage**: The system code page used for Unicode to Multibyte translations.The default code page is Unicode UTF-8 (65001).

The following is a list of valid code page identifiers:

|  |  |
| --- | --- |
| Identifier | Name |
| 037 | IBM EBCDIC - U.S./Canada |
| 437 | OEM - United States |
| 500 | IBM EBCDIC - International |
| 708 | Arabic - ASMO 708 |
| 709 | Arabic - ASMO 449+, BCON V4 |
| 710 | Arabic - Transparent Arabic |
| 720 | Arabic - Transparent ASMO |
| 737 | OEM - Greek (formerly 437G) |
| 775 | OEM - Baltic |
| 850 | OEM - Multilingual Latin I |
| 852 | OEM - Latin II |
| 855 | OEM - Cyrillic (primarily Russian) |
| 857 | OEM - Turkish |
| 858 | OEM - Multilingual Latin I + Euro symbol |
| 860 | OEM - Portuguese |
| 861 | OEM - Icelandic |
| 862 | OEM - Hebrew |
| 863 | OEM - Canadian-French |
| 864 | OEM - Arabic |
| 865 | OEM - Nordic |
| 866 | OEM - Russian |
| 869 | OEM - Modern Greek |
| 870 | IBM EBCDIC - Multilingual/ROECE (Latin-2) |
| 874 | ANSI/OEM - Thai (same as 28605, ISO 8859-15) |
| 875 | IBM EBCDIC - Modern Greek |
| 932 | ANSI/OEM - Japanese, Shift-JIS |
| 936 | ANSI/OEM - Simplified Chinese (PRC, Singapore) |
| 949 | ANSI/OEM - Korean (Unified Hangul Code) |
| 950 | ANSI/OEM - Traditional Chinese (Taiwan; Hong Kong SAR, PRC) |
| 1026 | IBM EBCDIC - Turkish (Latin-5) |
| 1047 | IBM EBCDIC - Latin 1/Open System |
| 1140 | IBM EBCDIC - U.S./Canada (037 + Euro symbol) |
| 1141 | IBM EBCDIC - Germany (20273 + Euro symbol) |
| 1142 | IBM EBCDIC - Denmark/Norway (20277 + Euro symbol) |
| 1143 | IBM EBCDIC - Finland/Sweden (20278 + Euro symbol) |
| 1144 | IBM EBCDIC - Italy (20280 + Euro symbol) |
| 1145 | IBM EBCDIC - Latin America/Spain (20284 + Euro symbol) |
| 1146 | IBM EBCDIC - United Kingdom (20285 + Euro symbol) |
| 1147 | IBM EBCDIC - France (20297 + Euro symbol) |
| 1148 | IBM EBCDIC - International (500 + Euro symbol) |
| 1149 | IBM EBCDIC - Icelandic (20871 + Euro symbol) |
| 1200 | Unicode UCS-2 Little-Endian (BMP of ISO 10646) |
| 1201 | Unicode UCS-2 Big-Endian |
| 1250 | ANSI - Central European |
| 1251 | ANSI - Cyrillic |
| 1252 | ANSI - Latin I |
| 1253 | ANSI - Greek |
| 1254 | ANSI - Turkish |
| 1255 | ANSI - Hebrew |
| 1256 | ANSI - Arabic |
| 1257 | ANSI - Baltic |
| 1258 | ANSI/OEM - Vietnamese |
| 1361 | Korean (Johab) |
| 10000 | MAC - Roman |
| 10001 | MAC - Japanese |
| 10002 | MAC - Traditional Chinese (Big5) |
| 10003 | MAC - Korean |
| 10004 | MAC - Arabic |
| 10005 | MAC - Hebrew |
| 10006 | MAC - Greek I |
| 10007 | MAC - Cyrillic |
| 10008 | MAC - Simplified Chinese (GB 2312) |
| 10010 | MAC - Romania |
| 10017 | MAC - Ukraine |
| 10021 | MAC - Thai |
| 10029 | MAC - Latin II |
| 10079 | MAC - Icelandic |
| 10081 | MAC - Turkish |
| 10082 | MAC - Croatia |
| 12000 | Unicode UCS-4 Little-Endian |
| 12001 | Unicode UCS-4 Big-Endian |
| 20000 | CNS - Taiwan |
| 20001 | TCA - Taiwan |
| 20002 | Eten - Taiwan |
| 20003 | IBM5550 - Taiwan |
| 20004 | TeleText - Taiwan |
| 20005 | Wang - Taiwan |
| 20105 | IA5 IRV International Alphabet No. 5 (7-bit) |
| 20106 | IA5 German (7-bit) |
| 20107 | IA5 Swedish (7-bit) |
| 20108 | IA5 Norwegian (7-bit) |
| 20127 | US-ASCII (7-bit) |
| 20261 | T.61 |
| 20269 | ISO 6937 Non-Spacing Accent |
| 20273 | IBM EBCDIC - Germany |
| 20277 | IBM EBCDIC - Denmark/Norway |
| 20278 | IBM EBCDIC - Finland/Sweden |
| 20280 | IBM EBCDIC - Italy |
| 20284 | IBM EBCDIC - Latin America/Spain |
| 20285 | IBM EBCDIC - United Kingdom |
| 20290 | IBM EBCDIC - Japanese Katakana Extended |
| 20297 | IBM EBCDIC - France |
| 20420 | IBM EBCDIC - Arabic |
| 20423 | IBM EBCDIC - Greek |
| 20424 | IBM EBCDIC - Hebrew |
| 20833 | IBM EBCDIC - Korean Extended |
| 20838 | IBM EBCDIC - Thai |
| 20866 | Russian - KOI8-R |
| 20871 | IBM EBCDIC - Icelandic |
| 20880 | IBM EBCDIC - Cyrillic (Russian) |
| 20905 | IBM EBCDIC - Turkish |
| 20924 | IBM EBCDIC - Latin-1/Open System (1047 + Euro symbol) |
| 20932 | JIS X 0208-1990 & 0121-1990 |
| 20936 | Simplified Chinese (GB2312) |
| 21025 | IBM EBCDIC - Cyrillic (Serbian, Bulgarian) |
| 21027 | Extended Alpha Lowercase |
| 21866 | Ukrainian (KOI8-U) |
| 28591 | ISO 8859-1 Latin I |
| 28592 | ISO 8859-2 Central Europe |
| 28593 | ISO 8859-3 Latin 3 |
| 28594 | ISO 8859-4 Baltic |
| 28595 | ISO 8859-5 Cyrillic |
| 28596 | ISO 8859-6 Arabic |
| 28597 | ISO 8859-7 Greek |
| 28598 | ISO 8859-8 Hebrew |
| 28599 | ISO 8859-9 Latin 5 |
| 28605 | ISO 8859-15 Latin 9 |
| 29001 | Europa 3 |
| 38598 | ISO 8859-8 Hebrew |
| 50220 | ISO 2022 Japanese with no halfwidth Katakana |
| 50221 | ISO 2022 Japanese with halfwidth Katakana |
| 50222 | ISO 2022 Japanese JIS X 0201-1989 |
| 50225 | ISO 2022 Korean |
| 50227 | ISO 2022 Simplified Chinese |
| 50229 | ISO 2022 Traditional Chinese |
| 50930 | Japanese (Katakana) Extended |
| 50931 | US/Canada and Japanese |
| 50933 | Korean Extended and Korean |
| 50935 | Simplified Chinese Extended and Simplified Chinese |
| 50936 | Simplified Chinese |
| 50937 | US/Canada and Traditional Chinese |
| 50939 | Japanese (Latin) Extended and Japanese |
| 51932 | EUC - Japanese |
| 51936 | EUC - Simplified Chinese |
| 51949 | EUC - Korean |
| 51950 | EUC - Traditional Chinese |
| 52936 | HZ-GB2312 Simplified Chinese |
| 54936 | Windows XP: GB18030 Simplified Chinese (4 Byte) |
| 57002 | ISCII Devanagari |
| 57003 | ISCII Bengali |
| 57004 | ISCII Tamil |
| 57005 | ISCII Telugu |
| 57006 | ISCII Assamese |
| 57007 | ISCII Oriya |
| 57008 | ISCII Kannada |
| 57009 | ISCII Malayalam |
| 57010 | ISCII Gujarati |
| 57011 | ISCII Punjabi |
| 65000 | Unicode UTF-7 |
| 65001 | Unicode UTF-8 |

 The following is a list of valid code page identifiers for Mac OS only:

|  |  |
| --- | --- |
| Identifier | Name |
| 1 | ASCII |
| 2 | NEXTSTEP |
| 3 | JapaneseEUC |
| 4 | UTF8 |
| 5 | ISOLatin1 |
| 6 | Symbol |
| 7 | NonLossyASCII |
| 8 | ShiftJIS |
| 9 | ISOLatin2 |
| 10 | Unicode |
| 11 | WindowsCP1251 |
| 12 | WindowsCP1252 |
| 13 | WindowsCP1253 |
| 14 | WindowsCP1254 |
| 15 | WindowsCP1250 |
| 21 | ISO2022JP |
| 30 | MacOSRoman |
| 10 | UTF16String |
| 0x90000100 | UTF16BigEndian |
| 0x94000100 | UTF16LittleEndian |
| 0x8c000100 | UTF32String |
| 0x98000100 | UTF32BigEndian |
| 0x9c000100 | UTF32LittleEndian |
| 65536 | Proprietary |

**LicenseInfo**: Information about the current license.When queried, this setting will return a string containing information about the license this instance of a class is using. It will return the following information:

- Product: The product the license is for.
- Product Key: The key the license was generated from.
- License Source: Where the license was found (e.g., RuntimeLicense, License File).
- License Type: The type of license installed (e.g., Royalty Free, Single Server).
- Last Valid Build: The last valid build number for which the license will work.

**MaskSensitiveData**: Whether sensitive data is masked in log messages.In certain circumstances it may be beneficial to mask sensitive data, like passwords, in log messages. Set this to *true* to mask sensitive data. The default is *true*.

**ProcessIdleEvents**: Whether the class uses its internal event loop to process events when the main thread is idle.If set to False, the class will not fire internal idle events. Set this to False to use the class in a background thread on Mac OS. By default, this setting is True.

**SelectWaitMillis**: The length of time in milliseconds the class will wait when DoEvents is called if there are no events to process.If there are no events to process when DoEvents is called, the class will wait for the amount of time specified here before returning. The default value is 20.

**UseFIPSCompliantAPI**: Tells the class whether or not to use FIPS certified APIs.When set to *true*, the class will utilize the underlying operating system's certified APIs. Java editions, regardless of OS, utilize Bouncy Castle Federal Information Processing Standards (FIPS), while all other Windows editions make use of Microsoft security libraries.

On Linux, the C++ edition requires installation of the FIPS-enabled OpenSSL library. The OpenSSL FIPS provider version must be at least 3.0.0. For additional information and instructions regarding the installation and activation of the FIPS-enabled OpenSSL library, please refer to the following link: [https://github.com/openssl/openssl/blob/master/README-FIPS.md](https://github.com/openssl/openssl/blob/master/README-FIPS.md)

To ensure the class utilizes the FIPS-enabled OpenSSL library, the obfuscated source code should first be compiled with OpenSSL enabled, as described in the Supported Platforms section. Additionally, the FIPS module should be enabled and active. If the obfuscated source code is not compiled as mentioned, or the FIPS module is inactive, the class will throw an appropriate error assuming FIPS mode is enabled.

FIPS mode can be enabled by setting the *UseFIPSCompliantAPI* configuration setting to *true*. This is a static setting that applies to all instances of all classes of the toolkit within the process. It is recommended to enable or disable this setting once before the component has been used to establish a connection. Enabling FIPS while an instance of the component is active and connected may result in unexpected behavior.

For more details, please see the [FIPS 140-2 Compliance](https://www.nsoftware.com/kb/articles/fips.rst) article.

NOTE: This setting is applicable only on Windows.

NOTE: Enabling FIPS compliance requires a special license; please contact [sales@nsoftware.com](mailto:sales@nsoftware.com) for details.

**UseInternalSecurityAPI**: Whether or not to use the system security libraries or an internal implementation. When set to *false*, the class will use the system security libraries by default to perform cryptographic functions where applicable.

Setting this configuration setting to *true* tells the class to use the internal implementation instead of using the system security libraries.

 On Windows, this setting is set to *false* by default. On Linux/macOS, this setting is set to *true* by default.

 To use the system security libraries for Linux, OpenSSL support must be enabled. For more information on how to enable OpenSSL, please refer to the [OpenSSL Notes](platforms.md) section.

# Trappable Errors ([JWT](#jwt-class) Class)

## Error Handling (C++)

Call the *GetLastErrorCode()* method to obtain the last called method's result code; *0* indicates success, while a non-zero error code indicates that this method encountered an error during its execution. Known error codes are listed below. If an error occurs, the *GetLastError()* method can be called to retrieve the associated error message.

### JWT Errors

|  |  |
| --- | --- |
| 301 | EncodedJWT is not set. The input is not valid. |
| 302 | Failed to parse claims. See error message for details. |
| 303 | Claim is not within its validity period. |
| 304 | Failed to verify an expected claim value. See error message for details. |

### JWS Errors

|  |  |
| --- | --- |
| 201 | Invalid JWS value. Not recognized as a compact serialized JWS string. |
| 202 | Signature verification failed. |
| 203 | Key must be specified before attempting this operation. |
| 204 | The specified key is too short for the selected algorithm. |
| 205 | Certificate must be specified before attempting this operation. |
| 206 | Unsupported algorithm. |
| 207 | OutputFile already exists and Overwrite is False. |
| 208 | Error writing data. See error message for details. |

### JWE Errors

|  |  |
| --- | --- |
| 101 | Invalid JWE message. See message for details. |
| 102 | Unsupported compression algorithm. |
| 103 | Unsupported content encryption algorithm. |
| 104 | Unsupported key encryption algorithm. |
| 105 | A required header for decryption was not found. See message for details. |
| 106 | The specified key is not a valid length for the algorithm. |
| 107 | OutputFile already exists and Overwrite is False. |
| 108 | KeyPassword must be set for the selected algorithm. |
| 109 | Key must be set for the selected algorithm. |
| 110 | Certificate must be set for the selected algorithm. |
| 111 | A header parameter defined to be critical is not present. |
| 112 | Error writing data. |
| 113 | Error reading data. Check message for details. |
| 114 | Error encrypting. Check message for details. |
| 115 | Error decrypting. Check message for details. |