JWT Class

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

Syntax

ipworksauth.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. Call Sign to create a signed JWT using a variety of signing algorithms including HMAC, RSA, and ECDSA. Use Verify to verify the signature of any received JWT. See SigningAlgorithm for more details about supported algorithms.

Use Encrypt to create an encrypted JWT using a variety of algorithms including ECDH, RSA, and AES. Use Decrypt to decrypt the payload of any received JWT. See EncryptionAlgorithm for more details about supported algorithms.

Signing

The Sign method may be used to sign a payload with a variety of algorithms. Before calling the Sign method set SigningAlgorithm 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 property will hold the compact serialized JWT. The following properties are applicable when calling this method:

• SigningAlgorithm (required)
• Certificate (conditional - required for ECDSA and RSA)
• Key (conditional - required for HMAC)
• ClaimAudience
• ClaimExp
• ClaimIssuedAt
• ClaimIssuer
• ClaimJWTId
• ClaimNotBefore
• Claims
• HeaderParams
• KeyId

Notes for HMAC Algorithms (HS256, HS384, HS512)

When SigningAlgorithm is set to a HMAC algorithm Key must be set to a key of appropriate length for the algorithm. The Key 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 property. For instance:

//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.

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 property should be set to a certificate with an ECC key. The CertMgr class can be used to create a certificate with an ECC key.

//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 to jwtNone.

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 method may be used to verify a received JWS message. Before calling the Verify method set EncodedJWT to a valid compact serialized JWT. For instance:

eyJhbGciOiJIUzI1NiJ9.eyJhdWQiOlsiYXVkaWVuY2UiXSwiaXNzIjoiaXNzdWVyIn0.mlFETSma4WUcUSjNSUWA1n9QBcQHCkHN-y4zeBsCVqI

The Key or SignerCert properties should be set to the HMAC key or public certificate respectively. If the correct Key or SignerCert is not known ahead of time the KeyId parameter of the SignerInfo event may be used to identify the correct key.

If this method returns without error verification was successful. If verification fails then this method throws an exception. After calling this method the claims will be parsed and the Claim* properties will be populated. The the HeaderParams property will contain the headers. Headers of the parsed message are also available through the HeaderParam event.

The following properties are applicable when calling this method:

• EncodedJWT (required)
• Key (conditional - required for HMAC)
• SignerCert (conditional - required for ECDSA and RSA)
• SigningAlgorithm (only if StrictValidation is True)
• StrictValidation
• ExpectedAudience (optional)
• ExpectedExp (optional)
• ExpectedIssuedAt (optional)
• ExpectedIssuer (optional)
• ExpectedJWTId (optional)
• ExpectedNotBefore (optional)
• ExpectedSubject (optional)

After calling this method the following properties are populated:

• ClaimAudience
• ClaimExp
• ClaimIssuedAt
• ClaimIssuer
• ClaimJWTId
• ClaimNotBefore
• Claims
• ClaimSubject
• HeaderParams

Notes for HMAC Algorithms (HS256, HS384, HS512)

When verifying a message originally signed with a HMAC algorithm Key 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.

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.

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 property. An example PEM encoded public certificate created by the CertMgr class:

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

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 method without setting the Key or Certificate properties.

Jwt jwt = new Jwt(); jwt.EncodedJWT = signedData; jwt.Verify(); string issuer = jwt.ClaimIssuer;

Encrypting

The Encrypt 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. The content encryption key is then encrypted itself using the algorithm specified by EncryptionAlgorithm. 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. 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 property will hold the compact serialized JWT. The following properties are applicable when calling this method:

• EncryptionAlgorithm (required)
• Key (conditional - required for AES)
• KeyPassword (conditional - required for PBES)
• RecipientCert (conditional - required for ECDH and RSA)
• ClaimAudience
• ClaimExp
• ClaimIssuedAt
• ClaimIssuer
• ClaimJWTId
• ClaimNotBefore
• Claims
• CompressionAlgorithm
• ContentEncryptionAlgorithm
• HeaderParams
• KeyId

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

When EncryptionAlgorithm is set to a AES algorithm Key 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 property. For instance:

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:

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 property. An example PEM encoded public certificate created by the ECC component:

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

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:

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 property. Set KeyPassword to a shared secret.

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 is set to Direct the Key property must be set to a valid symmetric key that will be used directly by the ContentEncryptionAlgorithm. In this case a content encryption key is not generated randomly, the Key is used instead. The length of the specified Key must be valid for the selected ContentEncryptionAlgorithm. For instance:

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 method may be used to decrypt a received JWE message. Before calling the Decrypt method set EncodedJWT to a valid compact serialized JWT string. For instance:

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:

If this method returns without error decryption was successful. If decryption fails then this method throws an exception. After calling this method the payload will be present in the Claim* properties and the HeaderParams property will contain the headers. Headers of the parsed message are also available through the HeaderParam event.

The following properties are applicable when calling this method:

• Certificate (conditional - required for RSA and ECDH)
• EncodedJWT
• Key (conditional - required for AES)
• ContentEncryptionAlgorithm (only if StrictValidation is True)
• EncryptionAlgorithm (only if StrictValidation is True)
• HeaderParams
• StrictValidation

After calling this method the following properties are populated:

• ClaimAudience
• ClaimExp
• ClaimIssuedAt
• ClaimIssuer
• ClaimJWTId
• ClaimNotBefore
• Claims
• ClaimSubject
• HeaderParams

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

To decrypt messages that use AES encryption Key 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.

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:

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 property.

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:

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 property. Set KeyPassword to the shared secret.

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 property must be set to a valid symmetric key that will be used directly by the ContentEncryptionAlgorithm. For instance:

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
• Enforcing algorithm restrictions when verifying by setting StrictValidation
• Inspect the JWT without verifying or decrypting by calling Parse

Property List

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

Method List

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

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.

Config Settings

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

Certificate Property (JWT Class)

The certificate used for signing or decrypting.

Syntax

public Certificate getCertificate();


public void setCertificate(Certificate certificate);

Remarks

This property specifies a certificate with private key.

When calling Sign and SigningAlgorithm is set to an RSA or ECDSA algorithm this property must be set to a certificate with private key.

When calling Decrypt and the message was encrypted using an RSA or ECDH EncryptionAlgorithm this property specifies the certificate with private key used to decrypt the message.

ClaimAudience Property (JWT Class)

The audience claim.

Syntax

public String getClaimAudience();


public void setClaimAudience(String claimAudience);

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 for details.

This property corresponds to the aud JSON property.

ClaimExp Property (JWT Class)

The expiration time claim.

Syntax

public String getClaimExp();


public void setClaimExp(String claimExp);

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.

ClaimIssuedAt Property (JWT Class)

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

Syntax

public String getClaimIssuedAt();


public void setClaimIssuedAt(String claimIssuedAt);

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.

ClaimIssuer Property (JWT Class)

The issuer of the JWT.

Syntax

public String getClaimIssuer();


public void setClaimIssuer(String claimIssuer);

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.

ClaimJWTId Property (JWT Class)

The unique identifier for the JWT.

Syntax

public String getClaimJWTId();


public void setClaimJWTId(String claimJWTId);

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.

ClaimNotBefore Property (JWT Class)

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

Syntax

public String getClaimNotBefore();


public void setClaimNotBefore(String claimNotBefore);

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.

Claims Property (JWT Class)

The claims in the JWT.

Syntax

public JWTClaimList getClaims();


public void setClaims(JWTClaimList claims);

Remarks

This property specifies the claims within the JWT. This may be populated before calling Sign or Encrypt. This is populated with the parsed claims after calling Verify, Decrypt, or Parse.

This property is not available at design time.

ClaimSubject Property (JWT Class)

The subject identifies the principal of the JWT.

Syntax

public String getClaimSubject();


public void setClaimSubject(String claimSubject);

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.

ContentEncryptionAlgorithm Property (JWT Class)

The algorithm used to encrypt the content.

Syntax

public int getContentEncryptionAlgorithm();


public void setContentEncryptionAlgorithm(int contentEncryptionAlgorithm);


Enumerated values:
  public final static int ceaA128CBC_HS256 = 0;
  public final static int ceaA192CBC_HS384 = 1;
  public final static int ceaA256CBC_HS512 = 2;
  public final static int ceaA128GCM = 3;
  public final static int ceaA192GCM = 4;
  public final static int ceaA256GCM = 5;

Default Value

0

Remarks

This property specifies the algorithm used to encrypt the content.

The following values are supported.

EncodedJWT Property (JWT Class)

The encoded JWT.

Syntax

public String getEncodedJWT();


public void setEncodedJWT(String encodedJWT);

Default Value

""

Remarks

This property holds the encoded JWT. This is populated after calling Sign or Encrypt.

This must be set to a valid JWT before calling Verify, Decrypt or Parse.

EncryptionAlgorithm Property (JWT Class)

The key encryption algorithm.

Syntax

public int getEncryptionAlgorithm();


public void setEncryptionAlgorithm(int encryptionAlgorithm);


Enumerated values:
  public final static int eaRSA1_5 = 0;
  public final static int eaRSA_OAEP = 1;
  public final static int eaRSA_OAEP_256 = 2;
  public final static int eaA128KW = 3;
  public final static int eaA192KW = 4;
  public final static int eaA256KW = 5;
  public final static int eaDir = 6;
  public final static int eaECDH_ES = 7;
  public final static int eaECDH_ES_A128KW = 8;
  public final static int eaECDH_ES_A192KW = 9;
  public final static int eaECDH_ES_A256KW = 10;
  public final static int eaA128GCMKW = 11;
  public final static int eaA192GCMKW = 12;
  public final static int eaA256GCMKW = 13;
  public final static int eaPBES2_HS256_A128KW = 14;
  public final static int eaPBES2_HS384_A192KW = 15;
  public final static int eaPBES2_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 property must be specified. When using an RSA or ECDH algorithm the RecipientCert property must be specified. When using a PBES algorithm the KeyPassword property must be specified;. Possible values are:

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

• PartyUInfo
• PartyVInfo

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

• PBES2Count
• PBES2SaltLength

HeaderParams Property (JWT Class)

The JOSE header parameters.

Syntax

public HeaderParamList getHeaderParams();


public void setHeaderParams(HeaderParamList headerParams);

Remarks

This property specifies the JOSE header parameters. This may be populated before calling Sign or Encrypt. This is populated with the parsed header values after calling Verify, Decrypt, or Parse.

This property is not available at design time.

Key Property (JWT Class)

The key used for HMAC and AES.

Syntax

public byte[] getKey();


public void setKey(byte[] key);

Default Value

""

Remarks

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

Signing

This property is applicable when SigningAlgorithm 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)

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 is it first hashed with the same algorithm.

Encrypting

When EncryptionAlgorithm 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 is set to Direct this key is used directly with the algorithm specified by ContentEncryptionAlgorithm and must be an appropriate size for the selected ContentEncryptionAlgorithm.

KeyId Property (JWT Class)

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

Syntax

public String getKeyId();


public void setKeyId(String keyId);

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 or Encrypt method.

KeyPassword Property (JWT Class)

The key password used in the PBES algorithm.

Syntax

public String getKeyPassword();


public void setKeyPassword(String keyPassword);

Default Value

""

Remarks

This property specifies the key password used to derive a key when using a PBES EncryptionAlgorithm.

This is only applicable to PBES algorithms and must be set before calling Encrypt or Decrypt.

This property does not apply when calling Sign or Verify.

RecipientCert Property (JWT Class)

The certificate used for encryption.

Syntax

public Certificate getRecipientCert();


public void setRecipientCert(Certificate recipientCert);

Remarks

When calling Encrypt and EncryptionAlgorithm is set to an RSA or ECDH algorithm this property must be set to a public certificate of the recipient.

SignerCert Property (JWT Class)

The certificate used for signature verification.

Syntax

public Certificate getSignerCert();


public void setSignerCert(Certificate signerCert);

Remarks

When calling Verify and the algorithm used is RSA or ECDSA this property must be set to the public certificate of the signer.

SigningAlgorithm Property (JWT Class)

The algorithm used when signing.

Syntax

public int getSigningAlgorithm();


public void setSigningAlgorithm(int signingAlgorithm);


Enumerated values:
  public final static int saHS256 = 0;
  public final static int saHS384 = 1;
  public final static int saHS512 = 2;
  public final static int saRS256 = 3;
  public final static int saRS384 = 4;
  public final static int saRS512 = 5;
  public final static int saES256 = 6;
  public final static int saES384 = 7;
  public final static int saES512 = 8;
  public final static int saPS256 = 9;
  public final static int saPS384 = 10;
  public final static int saPS512 = 11;
  public final static int saES256K = 12;
  public final static int saNone = 99;

Default Value

0

Remarks

This property specifies the algorithm to use when signing.

When signing with an HMAC algorithm Key must be specified. When an RSA or ECDSA algorithm is selected Certificate must be set before calling Sign and SignerCert must be set before calling Verify. The following values are supported:

Note: This setting is also applicable when StrictValidation is enabled before calling Verify.

AddClaim Method (Jwt Class)

Adds an new claim.

Syntax

public void addClaim(String name, String value, int dataType);

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)

AddHeaderParam Method (Jwt Class)

Adds additional header parameters.

Syntax

public void addHeaderParam(String name, String value, int dataType);

Remarks

This method is used to add additional header parameters before calling Encrypt or Sign.

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:

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

The following code can be used:

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 the class will automatically add some headers based on properties that are set.

Parameters Automatically Set:

Encrypting

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

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

The following code can be used:

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 the class will automatically add headers based on the selected EncryptionAlgorithm and other properties that may be set.

Parameters Automatically Set:

Config Method (Jwt Class)

Sets or retrieves a configuration setting.

Syntax

public String config(String configurationString);

Remarks

Config is a generic method available in every class. It is used to set and retrieve configuration settings 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, you must call Config("PROPERTY"). The value will be returned as a string.

Decrypt Method (Jwt Class)

Decrypts the encoded JWT.

Syntax

public void decrypt();

Remarks

This method decrypts the encoded JWT.

Before calling the Decrypt method set EncodedJWT to a valid compact serialized JWT string. For instance:

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:

If this method returns without error decryption was successful. If decryption fails then this method throws an exception. After calling this method the payload will be present in the Claim* properties and the HeaderParams property will contain the headers. Headers of the parsed message are also available through the HeaderParam event.

The following properties are applicable when calling this method:

• Certificate (conditional - required for RSA and ECDH)
• EncodedJWT
• Key (conditional - required for AES)
• ContentEncryptionAlgorithm (only if StrictValidation is True)
• EncryptionAlgorithm (only if StrictValidation is True)
• HeaderParams
• StrictValidation

After calling this method the following properties are populated:

• ClaimAudience
• ClaimExp
• ClaimIssuedAt
• ClaimIssuer
• ClaimJWTId
• ClaimNotBefore
• Claims
• ClaimSubject
• HeaderParams

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

To decrypt messages that use AES encryption Key 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.

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:

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 property.

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:

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 property. Set KeyPassword to the shared secret.

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 property must be set to a valid symmetric key that will be used directly by the ContentEncryptionAlgorithm. For instance:

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;

Encrypt Method (Jwt Class)

Encrypts the claims with the specified algorithms.

Syntax

public void 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. The content encryption key is then encrypted itself using the algorithm specified by EncryptionAlgorithm. 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. 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 property will hold the compact serialized JWT. The following properties are applicable when calling this method:

• EncryptionAlgorithm (required)
• Key (conditional - required for AES)
• KeyPassword (conditional - required for PBES)
• RecipientCert (conditional - required for ECDH and RSA)
• ClaimAudience
• ClaimExp
• ClaimIssuedAt
• ClaimIssuer
• ClaimJWTId
• ClaimNotBefore
• Claims
• CompressionAlgorithm
• ContentEncryptionAlgorithm
• HeaderParams
• KeyId

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

When EncryptionAlgorithm is set to a AES algorithm Key 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 property. For instance:

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:

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 property. An example PEM encoded public certificate created by the ECC component:

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

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:

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 property. Set KeyPassword to a shared secret.

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 is set to Direct the Key property must be set to a valid symmetric key that will be used directly by the ContentEncryptionAlgorithm. In this case a content encryption key is not generated randomly, the Key is used instead. The length of the specified Key must be valid for the selected ContentEncryptionAlgorithm. For instance:

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;

Parse Method (Jwt Class)

Parses the encoded JWT.

Syntax

public void 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 or Decrypt instead. It is not necessary to call this method before calling Verify or Decrypt. Verify or Decrypt will both parse and decrypt the message.

When calling this method the headers are parsed. The HeaderParam and RecipientInfo events will fire and the HeaderParams property will be populated.

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

Reset Method (Jwt Class)

Resets the class properties.

Syntax

public void reset();

Remarks

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

Sign Method (Jwt Class)

Signs the payload with the specified algorithm.

Syntax

public void sign();

Remarks

This method signs the claims specified by the Claim* properties with the specified SigningAlgorithm.

Before calling the Sign method set SigningAlgorithm 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 property will hold the compact serialized JWT. The following properties are applicable when calling this method:

• SigningAlgorithm (required)
• Certificate (conditional - required for ECDSA and RSA)
• Key (conditional - required for HMAC)
• ClaimAudience
• ClaimExp
• ClaimIssuedAt
• ClaimIssuer
• ClaimJWTId
• ClaimNotBefore
• Claims
• HeaderParams
• KeyId

Notes for HMAC Algorithms (HS256, HS384, HS512)

When SigningAlgorithm is set to a HMAC algorithm Key must be set to a key of appropriate length for the algorithm. The Key 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 property. For instance:

//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.

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 property should be set to a certificate with an ECC key. The CertMgr class can be used to create a certificate with an ECC key.

//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 to jwtNone.

Jwt jwt = new Jwt(); jwt.SigningAlgorithm = JwtSigningAlgorithms.saNone; jwt.ClaimAudience = "audience"; jwt.ClaimIssuer = "issuer"; jwt.ClaimExp = "1498508071"; jwt.Sign(); string unsecuredMessage = jwt.EncodedJWT;

Verify Method (Jwt Class)

Verifies the signature of the encoded JWT.

Syntax

public void verify();

Remarks

This method verifies the signature of the encoded JWT.

Before calling the Verify method set EncodedJWT to a valid compact serialized JWT. For instance:

eyJhbGciOiJIUzI1NiJ9.eyJhdWQiOlsiYXVkaWVuY2UiXSwiaXNzIjoiaXNzdWVyIn0.mlFETSma4WUcUSjNSUWA1n9QBcQHCkHN-y4zeBsCVqI

The Key or SignerCert properties should be set to the HMAC key or public certificate respectively. If the correct Key or SignerCert is not known ahead of time the KeyId parameter of the SignerInfo event may be used to identify the correct key.

If this method returns without error verification was successful. If verification fails then this method throws an exception. After calling this method the claims will be parsed and the Claim* properties will be populated. The the HeaderParams property will contain the headers. Headers of the parsed message are also available through the HeaderParam event.

The following properties are applicable when calling this method:

• EncodedJWT (required)
• Key (conditional - required for HMAC)
• SignerCert (conditional - required for ECDSA and RSA)
• SigningAlgorithm (only if StrictValidation is True)
• StrictValidation
• ExpectedAudience (optional)
• ExpectedExp (optional)
• ExpectedIssuedAt (optional)
• ExpectedIssuer (optional)
• ExpectedJWTId (optional)
• ExpectedNotBefore (optional)
• ExpectedSubject (optional)

After calling this method the following properties are populated:

• ClaimAudience
• ClaimExp
• ClaimIssuedAt
• ClaimIssuer
• ClaimJWTId
• ClaimNotBefore
• Claims
• ClaimSubject
• HeaderParams

Notes for HMAC Algorithms (HS256, HS384, HS512)

When verifying a message originally signed with a HMAC algorithm Key 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.

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.

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 property. An example PEM encoded public certificate created by the CertMgr class:

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

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 method without setting the Key or Certificate properties.

Jwt jwt = new Jwt(); jwt.EncodedJWT = signedData; jwt.Verify(); string issuer = jwt.ClaimIssuer;

ClaimInfo Event (Jwt Class)

Fires once for each claim.

Syntax

public class DefaultJwtEventListener implements JwtEventListener {
  ...
  public void claimInfo(JwtClaimInfoEvent e) {}
  ...
}

public class JwtClaimInfoEvent {
  public String name;
  public String value;
  public int dataType;
}

Remarks

When Decrypt, Verify or Parse 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 Class)

Information about errors during data delivery.

Syntax

public class DefaultJwtEventListener implements JwtEventListener {
  ...
  public void error(JwtErrorEvent e) {}
  ...
}

public class JwtErrorEvent {
  public int errorCode;
  public String description;
}

Remarks

The Error event is fired in case of exceptional conditions during message processing. Normally the class throws an exception.

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 section.

HeaderParam Event (Jwt Class)

Fires once for each JOSE header parameter.

Syntax

public class DefaultJwtEventListener implements JwtEventListener {
  ...
  public void headerParam(JwtHeaderParamEvent e) {}
  ...
}

public class JwtHeaderParamEvent {
  public String name;
  public String value;
  public int dataType;
}

Remarks

When Decrypt, Verify or Parse 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 Class)

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

Syntax

public class DefaultJwtEventListener implements JwtEventListener {
  ...
  public void recipientInfo(JwtRecipientInfoEvent e) {}
  ...
}

public class JwtRecipientInfoEvent {
  public String keyId;
  public String algorithm;
}

Remarks

This event fires with information about the key used to encrypt the data. This may be used to help identify the Key or Certificate properties to load in order to decrypt the message. This event fires when Decrypt or Parse 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 Class)

Fires with information about the signature.

Syntax

public class DefaultJwtEventListener implements JwtEventListener {
  ...
  public void signerInfo(JwtSignerInfoEvent e) {}
  ...
}

public class JwtSignerInfoEvent {
  public String keyId;
  public String algorithm;
}

Remarks

This event fires with information about the signature. This may be used to help identify the Key or Certificate properties to load in order to verify the signature. This event fires when Verify or Parse 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.

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.

Fields

Constructors

public Certificate();

Creates a Certificate instance whose properties can be set. This is useful for use with CERTMGR when generating new certificates.

public Certificate( certificateFile);

Opens CertificateFile and reads out the contents as an X509 public key.

public Certificate( certificateData);

Parses CertificateData as an X509 public key.

public Certificate( certStoreType,  store,  storePassword,  subject);

CertStoreType identifies the type of certificate store to use. See StoreType for descriptions of the different certificate stores. Store is a file containing the certificate store. StorePassword is the password used to protect the store. After the store has been successfully opened, the class will attempt to find the certificate identified by Subject . This can be either a complete or a substring match of the X509 certificate's subject Distinguished Name (DN).

public Certificate( certStoreType,  store,  storePassword,  subject,  configurationString);

CertStoreType identifies the type of certificate store to use. See StoreType for descriptions of the different certificate stores. Store is a file containing the certificate store. StorePassword is the password used to protect the store. ConfigurationString is a newline separated list of name-value pairs that may be used to modify the default behavior. Possible values include "PersistPFXKey", which shows whether or not the PFX key is persisted after performing operations with the private key. This correlates to the PKCS12_NO_PERSIST_KEY CyrptoAPI option. The default value is True (the key is persisted). "Thumbprint" - a MD5, SHA1, or SHA256 thumbprint of the certificate to load. When specified, this value is used to select the certificate in the store. This is applicable to cstUser, cstMachine, cstPublicKeyFile, and cstPFXFile store types. "UseInternalSecurityAPI" shows whether the platform (default) or the internal security API is used when performing certificate-related operations. After the store has been successfully opened, the class will attempt to find the certificate identified by Subject . This can be either a complete or a substring match of the X509 certificate's subject Distinguished Name (DN).

public Certificate( certStoreType,  store,  storePassword,  encoded);

CertStoreType identifies the type of certificate store to use. See StoreType for descriptions of the different certificate stores. Store is a file containing the certificate store. StorePassword is the password used to protect the store. After the store has been successfully opened, the class will load Encoded as an X509 certificate and search the opened store for a corresponding private key.

public Certificate( certStoreType,  storeBlob,  storePassword,  subject);

CertStoreType identifies the type of certificate store to use. See StoreType for descriptions of the different certificate stores. StoreBlob is a string (binary- or base64-encoded) containing the certificate data. StorePassword is the password used to protect the store. After the store has been successfully opened, the class will attempt to find the certificate identified by Subject . This can be either a complete or a substring match of the X509 certificate's subject Distinguished Name (DN).

public Certificate( certStoreType,  storeBlob,  storePassword,  subject,  configurationString);

CertStoreType identifies the type of certificate store to use. See StoreType for descriptions of the different certificate stores. StoreBlob is a string (binary- or base64-encoded) containing the certificate data. StorePassword is the password used to protect the store. After the store has been successfully opened, the class will attempt to find the certificate identified by Subject . This can be either a complete or a substring match of the X509 certificate's subject Distinguished Name (DN).

public Certificate( certStoreType,  storeBlob,  storePassword,  encoded);

CertStoreType identifies the type of certificate store to use. See StoreType for descriptions of the different certificate stores. Store is a string (binary- or base64-encoded) containing the certificate store. StorePassword is the password used to protect the store. After the store has been successfully opened, the class will load Encoded as an X509 certificate and search the opened store for a corresponding private key.

HeaderParam Type

The JOSE header parameter.

Remarks

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

Fields

Constructors

public HeaderParam();

Creates a new header parameter with no name or value.

public HeaderParam( name,  value);

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

public HeaderParam( name,  value,  dataType);

Creates a new header parameter with the specified DataType.

JWTClaim Type

The claim within the JWT.

Remarks

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

Fields

Constructors

public JWTClaim();

Creates a new claim with no name or value.

public JWTClaim( name,  value);

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

public JWTClaim( name,  value,  dataType);

Creates a new claim with the specified DataType.

Config Settings (Jwt Class)

JWT Config Settings

-----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-----

Base Config Settings

Trappable Errors (Jwt Class)

JWT Errors

JWS Errors

JWE Errors