PublicKeyCrypto Class

Properties   Methods   Events   Config Settings   Errors  

The PublicKeyCrypto class supports encrypting, decrypting, signing and verifying messages.

Syntax

PublicKeyCrypto

Remarks

PublicKeyCrypto allows you to encrypt, decrypt, sign and verify uninterpreted data. It implements low-level, or "raw" cryptographic primitives, such as RSA-PKCS1. The cryptographic primitives are typically used internally in higher-level protocols, such as CMS or PGP.

Cryptographic primitives work on small quantities of data (up to a few kilobytes). If you are looking to encrypt or sign large blobs of data, it is very likely that you need to use higher-level classes, such as MessageEncryptor, CAdESSigner, or PGPWriter.

A code snippet below illustrates the use of PublicKeyCrypto to encrypt (and decrypt) a data piece with OpenSSL-generated RSA keypair.

 
 Copy
procedure TForm1.HandleKeyPasswordNeeded(Sender: TObject; const NeededFor: String;
  var Password: String; var Cancel: Boolean);
begin
  Password := 'key-password';
end;

procedure TForm1.btnRSAEncryptClick(Sender: TObject);
var
  Crypto : TsbxPublicKeyCrypto;
  KeyMgr : TsbxCryptoKeyManager;
  Plaintext, Ciphertext, Decrypted : TBytes;
begin
  // prep
  Plaintext := TEncoding.UTF8.GetBytes('Hello, World!');

  // encryption
  KeyMgr := TsbxCryptoKeyManager.Create(nil);
  try
    KeyMgr.ImportFromFile('public.pem', kffPEM, '', '', '', ktPublic);

    Crypto := TsbxPublicKeyCrypto.Create(nil);
    try
      Crypto.Key := KeyMgr.Key;
      Ciphertext := Crypto.Encrypt(Plaintext);
    finally
      FreeAndNil(Crypto);
    end;
  finally
    FreeAndNil(KeyMgr);
  end;

  // decryption
  KeyMgr := TsbxCryptoKeyManager.Create(nil);
  try
    KeyMgr.OnPasswordNeeded := HandleKeyPasswordNeeded;
    KeyMgr.ImportFromFile('private.pem', kffPEM, '', '', '', ktSecret);

    Crypto := TsbxPublicKeyCrypto.Create(nil);
    try
      Crypto.Key := KeyMgr.Key;
      Decrypted := Crypto.Decrypt(Ciphertext);
    finally
      FreeAndNil(Crypto);
    end;
  finally
    FreeAndNil(KeyMgr);
  end;

  ShowMessage(TEncoding.UTF8.GetString(Decrypted));
end;

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.

CanEncrypt Property (PublicKeyCrypto Class)

Returns true if the crypto object can be used for encryption.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
int GetCanEncrypt();

Unicode (Windows)
BOOL GetCanEncrypt();

int secureblackbox_publickeycrypto_getcanencrypt(void* lpObj);

bool GetCanEncrypt();

Default Value

FALSE

Remarks

This property returns true if the crypto object can be used for encryption and decryption. This capability depends on the cryptographic algorithm.

This property is read-only and not available at design time.

Data Type

Boolean

CanSign Property (PublicKeyCrypto Class)

Returns true if the crypto object is capable of data signing.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
int GetCanSign();

Unicode (Windows)
BOOL GetCanSign();

int secureblackbox_publickeycrypto_getcansign(void* lpObj);

bool GetCanSign();

Default Value

FALSE

Remarks

This property returns true if the crypto object can be used for signing data and validating signatures. This capability depends on the cryptographic algorithm.

This property is read-only and not available at design time.

Data Type

Boolean

FIPSMode Property (PublicKeyCrypto Class)

Reserved.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
int GetFIPSMode();
int SetFIPSMode(int bFIPSMode);

Unicode (Windows)
BOOL GetFIPSMode();
INT SetFIPSMode(BOOL bFIPSMode);

int secureblackbox_publickeycrypto_getfipsmode(void* lpObj);
int secureblackbox_publickeycrypto_setfipsmode(void* lpObj, int bFIPSMode);

bool GetFIPSMode();
int SetFIPSMode(bool bFIPSMode);

Default Value

FALSE

Remarks

This property is reserved for future use.

Data Type

Boolean

HashAlgorithm Property (PublicKeyCrypto Class)

The hash algorithm to be used during the crypto operation.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
char* GetHashAlgorithm();
int SetHashAlgorithm(const char* lpszHashAlgorithm);

Unicode (Windows)
LPWSTR GetHashAlgorithm();
INT SetHashAlgorithm(LPCWSTR lpszHashAlgorithm);

char* secureblackbox_publickeycrypto_gethashalgorithm(void* lpObj);
int secureblackbox_publickeycrypto_sethashalgorithm(void* lpObj, const char* lpszHashAlgorithm);

QString GetHashAlgorithm();
int SetHashAlgorithm(QString qsHashAlgorithm);

Default Value

"SHA256"

Remarks

Use this property to adjust the hash to be used during the cryptographic operation. This typically applies to signing and verification, but can also apply to more complex encryption primitives, such as RSA-OEAP.

Data Type

String

InputEncoding Property (PublicKeyCrypto Class)

The encoding to apply to the input data.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
int GetInputEncoding();
int SetInputEncoding(int iInputEncoding);

Unicode (Windows)
INT GetInputEncoding();
INT SetInputEncoding(INT iInputEncoding);

CET_DEFAULT(0), 
CET_BINARY(1), 
CET_BASE_64(2), 
CET_COMPACT(3), 
CET_JSON(4)

int secureblackbox_publickeycrypto_getinputencoding(void* lpObj);
int secureblackbox_publickeycrypto_setinputencoding(void* lpObj, int iInputEncoding);

int GetInputEncoding();
int SetInputEncoding(int iInputEncoding);

Default Value

0

Remarks

Use this property to specify the encoding to apply to the input data.

Data Type

Integer

InputIsHash Property (PublicKeyCrypto Class)

Indicates whether the input data contains the hash or the actual data.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
int GetInputIsHash();
int SetInputIsHash(int bInputIsHash);

Unicode (Windows)
BOOL GetInputIsHash();
INT SetInputIsHash(BOOL bInputIsHash);

int secureblackbox_publickeycrypto_getinputishash(void* lpObj);
int secureblackbox_publickeycrypto_setinputishash(void* lpObj, int bInputIsHash);

bool GetInputIsHash();
int SetInputIsHash(bool bInputIsHash);

Default Value

FALSE

Remarks

Set this property to true to tell the class that the data you are passing to it is the hash of the data, rather than the actual (unhashed) data. If this property is set to false, class will hash the provided data internally if it is assumed by the algorithm.

This property is not available at design time.

Data Type

Boolean

JsonKeyHeaderParams Property (PublicKeyCrypto Class)

Contains key header parameters.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
char* GetJsonKeyHeaderParams();
int SetJsonKeyHeaderParams(const char* lpszJsonKeyHeaderParams);

Unicode (Windows)
LPWSTR GetJsonKeyHeaderParams();
INT SetJsonKeyHeaderParams(LPCWSTR lpszJsonKeyHeaderParams);

char* secureblackbox_publickeycrypto_getjsonkeyheaderparams(void* lpObj);
int secureblackbox_publickeycrypto_setjsonkeyheaderparams(void* lpObj, const char* lpszJsonKeyHeaderParams);

QString GetJsonKeyHeaderParams();
int SetJsonKeyHeaderParams(QString qsJsonKeyHeaderParams);

Default Value

"kid"

Remarks

Contains key header parameters.

Data Type

String

JsonProtectedHeader Property (PublicKeyCrypto Class)

Provides access to the header being protected.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
char* GetJsonProtectedHeader();
int SetJsonProtectedHeader(const char* lpszJsonProtectedHeader);

Unicode (Windows)
LPWSTR GetJsonProtectedHeader();
INT SetJsonProtectedHeader(LPCWSTR lpszJsonProtectedHeader);

char* secureblackbox_publickeycrypto_getjsonprotectedheader(void* lpObj);
int secureblackbox_publickeycrypto_setjsonprotectedheader(void* lpObj, const char* lpszJsonProtectedHeader);

QString GetJsonProtectedHeader();
int SetJsonProtectedHeader(QString qsJsonProtectedHeader);

Default Value

""

Remarks

Provides access to the header being protected.

Data Type

String

JsonUnprotectedHeader Property (PublicKeyCrypto Class)

Provides access to the unprotected part of the header.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
char* GetJsonUnprotectedHeader();
int SetJsonUnprotectedHeader(const char* lpszJsonUnprotectedHeader);

Unicode (Windows)
LPWSTR GetJsonUnprotectedHeader();
INT SetJsonUnprotectedHeader(LPCWSTR lpszJsonUnprotectedHeader);

char* secureblackbox_publickeycrypto_getjsonunprotectedheader(void* lpObj);
int secureblackbox_publickeycrypto_setjsonunprotectedheader(void* lpObj, const char* lpszJsonUnprotectedHeader);

QString GetJsonUnprotectedHeader();
int SetJsonUnprotectedHeader(QString qsJsonUnprotectedHeader);

Default Value

""

Remarks

Provides access to the unprotected part of the header.

Data Type

String

JsonUnprotectedHeaderParams Property (PublicKeyCrypto Class)

Contains unprotected header parameters.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
char* GetJsonUnprotectedHeaderParams();
int SetJsonUnprotectedHeaderParams(const char* lpszJsonUnprotectedHeaderParams);

Unicode (Windows)
LPWSTR GetJsonUnprotectedHeaderParams();
INT SetJsonUnprotectedHeaderParams(LPCWSTR lpszJsonUnprotectedHeaderParams);

char* secureblackbox_publickeycrypto_getjsonunprotectedheaderparams(void* lpObj);
int secureblackbox_publickeycrypto_setjsonunprotectedheaderparams(void* lpObj, const char* lpszJsonUnprotectedHeaderParams);

QString GetJsonUnprotectedHeaderParams();
int SetJsonUnprotectedHeaderParams(QString qsJsonUnprotectedHeaderParams);

Default Value

""

Remarks

Contains unprotected header parameters.

Data Type

String

KeyAlgorithm Property (PublicKeyCrypto Class)

The algorithm of the cryptographic key.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
char* GetKeyAlgorithm();
int SetKeyAlgorithm(const char* lpszKeyAlgorithm);

Unicode (Windows)
LPWSTR GetKeyAlgorithm();
INT SetKeyAlgorithm(LPCWSTR lpszKeyAlgorithm);

char* secureblackbox_publickeycrypto_getkeyalgorithm(void* lpObj);
int secureblackbox_publickeycrypto_setkeyalgorithm(void* lpObj, const char* lpszKeyAlgorithm);

QString GetKeyAlgorithm();
int SetKeyAlgorithm(QString qsKeyAlgorithm);

Default Value

""

Remarks

The algorithm of the cryptographic key. A cryptokey object may hold either symmetric, MAC, or public key. Public key algorithms: RSA, ECDSA, Elgamal, DH.

This property is not available at design time.

Data Type

String

KeyBits Property (PublicKeyCrypto Class)

The length of the key in bits.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
int GetKeyBits();

Unicode (Windows)
INT GetKeyBits();

int secureblackbox_publickeycrypto_getkeybits(void* lpObj);

int GetKeyBits();

Default Value

0

Remarks

The length of the key in bits.

This property is read-only and not available at design time.

Data Type

Integer

KeyCurve Property (PublicKeyCrypto Class)

This property specifies the name of the curve the EC key is built on.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
char* GetKeyCurve();
int SetKeyCurve(const char* lpszKeyCurve);

Unicode (Windows)
LPWSTR GetKeyCurve();
INT SetKeyCurve(LPCWSTR lpszKeyCurve);

char* secureblackbox_publickeycrypto_getkeycurve(void* lpObj);
int secureblackbox_publickeycrypto_setkeycurve(void* lpObj, const char* lpszKeyCurve);

QString GetKeyCurve();
int SetKeyCurve(QString qsKeyCurve);

Default Value

""

Remarks

This property specifies the name of the curve the EC key is built on.

This property is not available at design time.

Data Type

String

KeyExportable Property (PublicKeyCrypto Class)

Returns True if the key is exportable (can be serialized into an array of bytes), and False otherwise.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
int GetKeyExportable();

Unicode (Windows)
BOOL GetKeyExportable();

int secureblackbox_publickeycrypto_getkeyexportable(void* lpObj);

bool GetKeyExportable();

Default Value

FALSE

Remarks

Returns True if the key is exportable (can be serialized into an array of bytes), and False otherwise.

This property is read-only and not available at design time.

Data Type

Boolean

KeyHandle Property (PublicKeyCrypto Class)

Allows to get or set a 'handle', a unique identifier of the underlying property object.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
int64 GetKeyHandle();
int SetKeyHandle(int64 lKeyHandle);

Unicode (Windows)
LONG64 GetKeyHandle();
INT SetKeyHandle(LONG64 lKeyHandle);

int64 secureblackbox_publickeycrypto_getkeyhandle(void* lpObj);
int secureblackbox_publickeycrypto_setkeyhandle(void* lpObj, int64 lKeyHandle);

qint64 GetKeyHandle();
int SetKeyHandle(qint64 lKeyHandle);

Default Value

0

Remarks

Allows to get or set a 'handle', a unique identifier of the underlying property object. Use this property to assign objects of the same type in a quicker manner, without copying them fieldwise.

When you pass a handle of one object to another, the source object is copied to the destination rather than assigned. It is safe to get rid of the original object after such operation.

 
 Copy
  pdfSigner.setSigningCertHandle(certMgr.getCertHandle());

This property is not available at design time.

Data Type

Long64

KeyID Property (PublicKeyCrypto Class)

Provides access to a storage-specific key identifier.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
int GetKeyID(char* &lpKeyID, int &lenKeyID);
int SetKeyID(const char* lpKeyID, int lenKeyID);

Unicode (Windows)
INT GetKeyID(LPSTR &lpKeyID, INT &lenKeyID);
INT SetKeyID(LPCSTR lpKeyID, INT lenKeyID);

int secureblackbox_publickeycrypto_getkeyid(void* lpObj, char** lpKeyID, int* lenKeyID);
int secureblackbox_publickeycrypto_setkeyid(void* lpObj, const char* lpKeyID, int lenKeyID);

QByteArray GetKeyID();
int SetKeyID(QByteArray qbaKeyID);

Remarks

Provides access to a storage-specific key identifier. Key identifiers are used by cryptographic providers to refer to a particular key and/or distinguish between different keys. They are typically unique within a storage, but there is no guarantee that a particular cryptoprovider will conform to that (or will assign any key IDs at all).

This property is not available at design time.

Data Type

Byte Array

KeyIV Property (PublicKeyCrypto Class)

The initialization vector (IV) of a symmetric key.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
int GetKeyIV(char* &lpKeyIV, int &lenKeyIV);
int SetKeyIV(const char* lpKeyIV, int lenKeyIV);

Unicode (Windows)
INT GetKeyIV(LPSTR &lpKeyIV, INT &lenKeyIV);
INT SetKeyIV(LPCSTR lpKeyIV, INT lenKeyIV);

int secureblackbox_publickeycrypto_getkeyiv(void* lpObj, char** lpKeyIV, int* lenKeyIV);
int secureblackbox_publickeycrypto_setkeyiv(void* lpObj, const char* lpKeyIV, int lenKeyIV);

QByteArray GetKeyIV();
int SetKeyIV(QByteArray qbaKeyIV);

Remarks

The initialization vector (IV) of a symmetric key. This is normally a public part of a symmetric key, the idea of which is to introduce randomness to the encrypted data and/or serve as a first block in chaining ciphers.

This property is not available at design time.

Data Type

Byte Array

KeyKey Property (PublicKeyCrypto Class)

The byte array representation of the key.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
int GetKeyKey(char* &lpKeyKey, int &lenKeyKey);

Unicode (Windows)
INT GetKeyKey(LPSTR &lpKeyKey, INT &lenKeyKey);

int secureblackbox_publickeycrypto_getkeykey(void* lpObj, char** lpKeyKey, int* lenKeyKey);

QByteArray GetKeyKey();

Remarks

The byte array representation of the key. This may not be available for non-KeyExportable keys.

This property is read-only and not available at design time.

Data Type

Byte Array

KeyNonce Property (PublicKeyCrypto Class)

A nonce value associated with a key.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
int GetKeyNonce(char* &lpKeyNonce, int &lenKeyNonce);
int SetKeyNonce(const char* lpKeyNonce, int lenKeyNonce);

Unicode (Windows)
INT GetKeyNonce(LPSTR &lpKeyNonce, INT &lenKeyNonce);
INT SetKeyNonce(LPCSTR lpKeyNonce, INT lenKeyNonce);

int secureblackbox_publickeycrypto_getkeynonce(void* lpObj, char** lpKeyNonce, int* lenKeyNonce);
int secureblackbox_publickeycrypto_setkeynonce(void* lpObj, const char* lpKeyNonce, int lenKeyNonce);

QByteArray GetKeyNonce();
int SetKeyNonce(QByteArray qbaKeyNonce);

Remarks

A nonce value associated with a key. It is similar to IV, but its only purpose is to introduce randomness.

This property is not available at design time.

Data Type

Byte Array

KeyPrivate Property (PublicKeyCrypto Class)

Returns True if the object hosts a private key, and False otherwise.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
int GetKeyPrivate();

Unicode (Windows)
BOOL GetKeyPrivate();

int secureblackbox_publickeycrypto_getkeyprivate(void* lpObj);

bool GetKeyPrivate();

Default Value

FALSE

Remarks

Returns True if the object hosts a private key, and False otherwise.

This property is read-only and not available at design time.

Data Type

Boolean

KeyPublic Property (PublicKeyCrypto Class)

Returns True if the object hosts a public key, and False otherwise.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
int GetKeyPublic();

Unicode (Windows)
BOOL GetKeyPublic();

int secureblackbox_publickeycrypto_getkeypublic(void* lpObj);

bool GetKeyPublic();

Default Value

FALSE

Remarks

Returns True if the object hosts a public key, and False otherwise.

This property is read-only and not available at design time.

Data Type

Boolean

KeySubject Property (PublicKeyCrypto Class)

Returns the key subject.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
int GetKeySubject(char* &lpKeySubject, int &lenKeySubject);
int SetKeySubject(const char* lpKeySubject, int lenKeySubject);

Unicode (Windows)
INT GetKeySubject(LPSTR &lpKeySubject, INT &lenKeySubject);
INT SetKeySubject(LPCSTR lpKeySubject, INT lenKeySubject);

int secureblackbox_publickeycrypto_getkeysubject(void* lpObj, char** lpKeySubject, int* lenKeySubject);
int secureblackbox_publickeycrypto_setkeysubject(void* lpObj, const char* lpKeySubject, int lenKeySubject);

QByteArray GetKeySubject();
int SetKeySubject(QByteArray qbaKeySubject);

Remarks

Returns the key subject. This is a cryptoprovider-dependent value, which normally aims to provide some user-friendly insight into the key owner.

This property is not available at design time.

Data Type

Byte Array

KeySymmetric Property (PublicKeyCrypto Class)

Returns True if the object contains a symmetric key, and False otherwise.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
int GetKeySymmetric();

Unicode (Windows)
BOOL GetKeySymmetric();

int secureblackbox_publickeycrypto_getkeysymmetric(void* lpObj);

bool GetKeySymmetric();

Default Value

FALSE

Remarks

Returns True if the object contains a symmetric key, and False otherwise.

This property is read-only and not available at design time.

Data Type

Boolean

KeyValid Property (PublicKeyCrypto Class)

Returns True if this key is valid.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
int GetKeyValid();

Unicode (Windows)
BOOL GetKeyValid();

int secureblackbox_publickeycrypto_getkeyvalid(void* lpObj);

bool GetKeyValid();

Default Value

FALSE

Remarks

Returns True if this key is valid. The term Valid highly depends on the kind of the key being stored. A symmetric key is considered valid if its length fits the algorithm being set. The validity of an RSA key also ensures that the RSA key elements (primes, exponents, and modulus) are consistent.

This property is read-only and not available at design time.

Data Type

Boolean

OutputEncoding Property (PublicKeyCrypto Class)

The encoding type to apply to the output data.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
int GetOutputEncoding();
int SetOutputEncoding(int iOutputEncoding);

Unicode (Windows)
INT GetOutputEncoding();
INT SetOutputEncoding(INT iOutputEncoding);

CET_DEFAULT(0), 
CET_BINARY(1), 
CET_BASE_64(2), 
CET_COMPACT(3), 
CET_JSON(4)

int secureblackbox_publickeycrypto_getoutputencoding(void* lpObj);
int secureblackbox_publickeycrypto_setoutputencoding(void* lpObj, int iOutputEncoding);

int GetOutputEncoding();
int SetOutputEncoding(int iOutputEncoding);

Default Value

0

Remarks

Use this property to specify the encoding type to apply to the protected data.

Data Type

Integer

Scheme Property (PublicKeyCrypto Class)

The algorithm scheme to use.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
char* GetScheme();
int SetScheme(const char* lpszScheme);

Unicode (Windows)
LPWSTR GetScheme();
INT SetScheme(LPCWSTR lpszScheme);

char* secureblackbox_publickeycrypto_getscheme(void* lpObj);
int secureblackbox_publickeycrypto_setscheme(void* lpObj, const char* lpszScheme);

QString GetScheme();
int SetScheme(QString qsScheme);

Default Value

""

Remarks

Certain asymmetric algorithms are often accompanied with a specific algorithm scheme. Two typical examples are RSA's own OAEP and PSS schemes. Use this property to tune up the scheme to use. Leave it empty to proceed with the standard scheme (such as PKCS#1-v1.5 for RSA). Supported schemes:

RSA: PKCS#1, PSS, OAEP, SSL3

ECDSA: ed25519, ed448, ed25519ph, ed448ph

Data Type

String

SchemeParams Property (PublicKeyCrypto Class)

The algorithm scheme parameters to employ.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
char* GetSchemeParams();
int SetSchemeParams(const char* lpszSchemeParams);

Unicode (Windows)
LPWSTR GetSchemeParams();
INT SetSchemeParams(LPCWSTR lpszSchemeParams);

char* secureblackbox_publickeycrypto_getschemeparams(void* lpObj);
int secureblackbox_publickeycrypto_setschemeparams(void* lpObj, const char* lpszSchemeParams);

QString GetSchemeParams();
int SetSchemeParams(QString qsSchemeParams);

Default Value

""

Remarks

Use this property to specify the parameters of the algorithm scheme if needed.

Data Type

String

SignatureValidationResult Property (PublicKeyCrypto Class)

The signature validation result.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
int GetSignatureValidationResult();

Unicode (Windows)
INT GetSignatureValidationResult();

SVT_VALID(0), 
SVT_UNKNOWN(1), 
SVT_CORRUPTED(2), 
SVT_SIGNER_NOT_FOUND(3), 
SVT_FAILURE(4)

int secureblackbox_publickeycrypto_getsignaturevalidationresult(void* lpObj);

int GetSignatureValidationResult();

Default Value

0

Remarks

Use this property to check the result of the most recent signature validation.

This property is read-only and not available at design time.

Data Type

Integer

Config Method (PublicKeyCrypto Class)

Sets or retrieves a configuration setting.

Syntax

• C++
• C
• Qt

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

Unicode (Windows)
LPWSTR Config(LPCWSTR lpszConfigurationString);

char* secureblackbox_publickeycrypto_config(void* lpObj, const char* lpszConfigurationString);

QString Config(const QString& qsConfigurationString);

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.

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 (PublicKeyCrypto Class)

Decrypts a buffer.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
char* Decrypt(const char* lpBuffer, int lenBuffer, int *lpSize = NULL);

Unicode (Windows)
LPSTR Decrypt(LPCSTR lpBuffer, INT lenBuffer, LPINT lpSize = NULL);

char* secureblackbox_publickeycrypto_decrypt(void* lpObj, const char* lpBuffer, int lenBuffer, int *lpSize);

QByteArray Decrypt(QByteArray qbaBuffer);

Remarks

Use this method to decrypt a byte array and get the encrypted message in another byte array.

Specify the decryption key in Key property before calling this method.

Error Handling (C++)

This method returns a Byte Array value (with length lpSize); 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.

DecryptFile Method (PublicKeyCrypto Class)

Decrypts a file.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
int DecryptFile(const char* lpszSourceFile, const char* lpszDestFile);

Unicode (Windows)
INT DecryptFile(LPCWSTR lpszSourceFile, LPCWSTR lpszDestFile);

int secureblackbox_publickeycrypto_decryptfile(void* lpObj, const char* lpszSourceFile, const char* lpszDestFile);

int DecryptFile(const QString& qsSourceFile, const QString& qsDestFile);

Remarks

Use this method to decrypt an encrypted file and save the decrypted data to another file.

Specify the decryption key in Key property before calling this method.

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.)

DecryptStream Method (PublicKeyCrypto Class)

Decrypts a stream.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
int DecryptStream(SecureBlackboxStream* sSourceStream, SecureBlackboxStream* sDestStream);

Unicode (Windows)
INT DecryptStream(SecureBlackboxStream* sSourceStream, SecureBlackboxStream* sDestStream);

int secureblackbox_publickeycrypto_decryptstream(void* lpObj, SecureBlackboxStream* sSourceStream, SecureBlackboxStream* sDestStream);

int DecryptStream(SecureBlackboxStream* sSourceStream, SecureBlackboxStream* sDestStream);

Remarks

Use this method to decrypt a stream and save the decrypted message into another stream.

Specify the decryption key in Key property before calling this method.

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.)

DoAction Method (PublicKeyCrypto Class)

Performs an additional action.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
char* DoAction(const char* lpszActionID, const char* lpszActionParams);

Unicode (Windows)
LPWSTR DoAction(LPCWSTR lpszActionID, LPCWSTR lpszActionParams);

char* secureblackbox_publickeycrypto_doaction(void* lpObj, const char* lpszActionID, const char* lpszActionParams);

QString DoAction(const QString& qsActionID, const QString& qsActionParams);

Remarks

DoAction is a generic method available in every class. It is used to perform an additional action introduced after the product major release. The list of actions is not fixed, and may be flexibly extended over time.

The unique identifier (case insensitive) of the action is provided in the ActionID parameter.

ActionParams contains the value of a single parameter, or a list of multiple parameters for the action in the form of PARAM1=VALUE1;PARAM2=VALUE2;....

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.

Encrypt Method (PublicKeyCrypto Class)

Encrypts a buffer.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
char* Encrypt(const char* lpBuffer, int lenBuffer, int *lpSize = NULL);

Unicode (Windows)
LPSTR Encrypt(LPCSTR lpBuffer, INT lenBuffer, LPINT lpSize = NULL);

char* secureblackbox_publickeycrypto_encrypt(void* lpObj, const char* lpBuffer, int lenBuffer, int *lpSize);

QByteArray Encrypt(QByteArray qbaBuffer);

Remarks

Use this method to encrypt a byte array and get the protected message in another byte array.

Specify the encryption key in the Key property before commencing encryption.

Error Handling (C++)

This method returns a Byte Array value (with length lpSize); 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.

EncryptFile Method (PublicKeyCrypto Class)

Encrypts a file.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
int EncryptFile(const char* lpszSourceFile, const char* lpszDestFile);

Unicode (Windows)
INT EncryptFile(LPCWSTR lpszSourceFile, LPCWSTR lpszDestFile);

int secureblackbox_publickeycrypto_encryptfile(void* lpObj, const char* lpszSourceFile, const char* lpszDestFile);

int EncryptFile(const QString& qsSourceFile, const QString& qsDestFile);

Remarks

Use this method to encrypt a file and save the protected message to another file.

Specify the encryption key in Key property before commencing encryption.

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.)

EncryptStream Method (PublicKeyCrypto Class)

Encrypts a stream.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
int EncryptStream(SecureBlackboxStream* sSourceStream, SecureBlackboxStream* sDestStream);

Unicode (Windows)
INT EncryptStream(SecureBlackboxStream* sSourceStream, SecureBlackboxStream* sDestStream);

int secureblackbox_publickeycrypto_encryptstream(void* lpObj, SecureBlackboxStream* sSourceStream, SecureBlackboxStream* sDestStream);

int EncryptStream(SecureBlackboxStream* sSourceStream, SecureBlackboxStream* sDestStream);

Remarks

Use this method to encrypt a stream and save the protected message into another stream.

Specify the encryption key in Key property before commencing encryption.

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 (PublicKeyCrypto Class)

Signs a buffer.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
char* Sign(const char* lpBuffer, int lenBuffer, int bDetached, int *lpSize = NULL);

Unicode (Windows)
LPSTR Sign(LPCSTR lpBuffer, INT lenBuffer, BOOL bDetached, LPINT lpSize = NULL);

char* secureblackbox_publickeycrypto_sign(void* lpObj, const char* lpBuffer, int lenBuffer, int bDetached, int *lpSize);

QByteArray Sign(QByteArray qbaBuffer, bool bDetached);

Remarks

Use this method to sign a byte array and get the protected message in another byte array. Set the Detached parameter to false to create an enveloped/enveloping, rather than detached signature. Please note that certain signature algorithms/kinds only support detached signing.

Specify the signing key in Key property before commencing the signing.

Please note that the key assigned must have a private key part.

Error Handling (C++)

This method returns a Byte Array value (with length lpSize); 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.

SignFile Method (PublicKeyCrypto Class)

Signs a file.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
int SignFile(const char* lpszSourceFile, const char* lpszDestFile, int bDetached);

Unicode (Windows)
INT SignFile(LPCWSTR lpszSourceFile, LPCWSTR lpszDestFile, BOOL bDetached);

int secureblackbox_publickeycrypto_signfile(void* lpObj, const char* lpszSourceFile, const char* lpszDestFile, int bDetached);

int SignFile(const QString& qsSourceFile, const QString& qsDestFile, bool bDetached);

Remarks

Use this method to sign a file and save the protected message to another file.

Specify the signing key in Key property before the signing. Please make sure the assigned key has a private key associated with it.

Set Detached parameter to false to create an enveloped/enveloping signature. This may not be supported by certain algorithms or encryption modes.

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.)

SignStream Method (PublicKeyCrypto Class)

Signs a stream.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
int SignStream(SecureBlackboxStream* sSourceStream, SecureBlackboxStream* sDestStream, int bDetached);

Unicode (Windows)
INT SignStream(SecureBlackboxStream* sSourceStream, SecureBlackboxStream* sDestStream, BOOL bDetached);

int secureblackbox_publickeycrypto_signstream(void* lpObj, SecureBlackboxStream* sSourceStream, SecureBlackboxStream* sDestStream, int bDetached);

int SignStream(SecureBlackboxStream* sSourceStream, SecureBlackboxStream* sDestStream, bool bDetached);

Remarks

Use this method to sign a stream and save the protected message to another stream.

Specify the signing key in Key property before commencing the signing. Note that the signing key must come with its private key.

Set Detached parameter to false to produce enveloped/enveloping, and not detached signature. Many encryption algorithms/modes do not support non-detached signatures.

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 (PublicKeyCrypto Class)

Verifies an enveloped or enveloping signature contained in a buffer.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
char* Verify(const char* lpBuffer, int lenBuffer, int *lpSize = NULL);

Unicode (Windows)
LPSTR Verify(LPCSTR lpBuffer, INT lenBuffer, LPINT lpSize = NULL);

char* secureblackbox_publickeycrypto_verify(void* lpObj, const char* lpBuffer, int lenBuffer, int *lpSize);

QByteArray Verify(QByteArray qbaBuffer);

Remarks

Use this method to verify an enveloped or enveloping signature contained in a byte array. The method verifies the signature and extracts the original signed content into another byte array.

The validation result is stored in SignatureValidationResult property.

Use VerifyDetached to verify detached signatures.

Specify the verification key in the Key property before commencing verification.

Error Handling (C++)

This method returns a Byte Array value (with length lpSize); 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.

VerifyDetached Method (PublicKeyCrypto Class)

Verifies a detached signature.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
int VerifyDetached(const char* lpSignedData, int lenSignedData, const char* lpSignature, int lenSignature);

Unicode (Windows)
INT VerifyDetached(LPCSTR lpSignedData, INT lenSignedData, LPCSTR lpSignature, INT lenSignature);

int secureblackbox_publickeycrypto_verifydetached(void* lpObj, const char* lpSignedData, int lenSignedData, const char* lpSignature, int lenSignature);

int VerifyDetached(QByteArray qbaSignedData, QByteArray qbaSignature);

Remarks

Use this method to verify a detached signature. Pass the original message via the SignedData parameter, and the signature via the Signature parameter.

The validation result is stored in SignatureValidationResult property.

Provide the verification key in Key property before commencing verification.

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.)

VerifyDetachedFile Method (PublicKeyCrypto Class)

Verifies a detached signature.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
int VerifyDetachedFile(const char* lpszSignedDataFile, const char* lpszSignatureFile);

Unicode (Windows)
INT VerifyDetachedFile(LPCWSTR lpszSignedDataFile, LPCWSTR lpszSignatureFile);

int secureblackbox_publickeycrypto_verifydetachedfile(void* lpObj, const char* lpszSignedDataFile, const char* lpszSignatureFile);

int VerifyDetachedFile(const QString& qsSignedDataFile, const QString& qsSignatureFile);

Remarks

Use this method to verify a detached signature. Pass the original data via the SignedDataFile parameter, and the signature via the SignatureFile parameter.

The validation result is stored in SignatureValidationResult property.

Provide the verification key in Key property.

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.)

VerifyDetachedStream Method (PublicKeyCrypto Class)

Verifies a detached signature.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
int VerifyDetachedStream(SecureBlackboxStream* sSignedDataStream, SecureBlackboxStream* sSignatureStream);

Unicode (Windows)
INT VerifyDetachedStream(SecureBlackboxStream* sSignedDataStream, SecureBlackboxStream* sSignatureStream);

int secureblackbox_publickeycrypto_verifydetachedstream(void* lpObj, SecureBlackboxStream* sSignedDataStream, SecureBlackboxStream* sSignatureStream);

int VerifyDetachedStream(SecureBlackboxStream* sSignedDataStream, SecureBlackboxStream* sSignatureStream);

Remarks

Use this method to verify a detached signature. Provide the original signed data via the SignedDataStream parameter, and the signature via the SignatureStream parameter.

The validation result will be stored in SignatureValidationResult property.

Specify the verification public key in Key property before commencing validation.

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.)

VerifyFile Method (PublicKeyCrypto Class)

Verifies an enveloped or enveloping signature contained in a file.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
int VerifyFile(const char* lpszSourceFile, const char* lpszDestFile);

Unicode (Windows)
INT VerifyFile(LPCWSTR lpszSourceFile, LPCWSTR lpszDestFile);

int secureblackbox_publickeycrypto_verifyfile(void* lpObj, const char* lpszSourceFile, const char* lpszDestFile);

int VerifyFile(const QString& qsSourceFile, const QString& qsDestFile);

Remarks

Use this method to verify an enveloped or enveloping signature and extract the original signed message to another file.

The validation result is stored in SignatureValidationResult property.

Specify the public verification key in Key property before commencing the validation.

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.)

VerifyStream Method (PublicKeyCrypto Class)

Verifies an enveloping or enveloped signature contained in a stream.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
int VerifyStream(SecureBlackboxStream* sSourceStream, SecureBlackboxStream* sDestStream);

Unicode (Windows)
INT VerifyStream(SecureBlackboxStream* sSourceStream, SecureBlackboxStream* sDestStream);

int secureblackbox_publickeycrypto_verifystream(void* lpObj, SecureBlackboxStream* sSourceStream, SecureBlackboxStream* sDestStream);

int VerifyStream(SecureBlackboxStream* sSourceStream, SecureBlackboxStream* sDestStream);

Remarks

Use this method to verify an enveloping or enveloped signature and extract the original data into a stream.

The outcome of the validation is stored in SignatureValidationResult property.

Provide the public verification key via the Key property before commencing the validation.

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.)

Error Event (PublicKeyCrypto Class)

Reports error information during a crypto operation.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
virtual int FireError(PublicKeyCryptoErrorEventParams *e);

typedef struct {
  int ErrorCode;
  const char *Description;
  int reserved;
} PublicKeyCryptoErrorEventParams;


Unicode (Windows)
virtual INT FireError(PublicKeyCryptoErrorEventParams *e);

typedef struct {
  INT ErrorCode;
  LPCWSTR Description;
  INT reserved;
} PublicKeyCryptoErrorEventParams;

#define EID_PUBLICKEYCRYPTO_ERROR 1

virtual INT SECUREBLACKBOX_CALL FireError(INT &iErrorCode, LPSTR &lpszDescription);

class PublicKeyCryptoErrorEventParams {
public:
  int ErrorCode();

  const QString &Description();

  int EventRetVal();
  void SetEventRetVal(int iRetVal);
};

// To handle, connect one or more slots to this signal.
void Error(PublicKeyCryptoErrorEventParams *e);

// Or, subclass PublicKeyCrypto and override this emitter function.
virtual int FireError(PublicKeyCryptoErrorEventParams *e) {...}

Remarks

Class fires this event if an error is encountered during a cryptographic operation.

ErrorCode contains an error code and Description contains a textual description of the error that happened.

Notification Event (PublicKeyCrypto Class)

This event notifies the application about an underlying control flow event.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
virtual int FireNotification(PublicKeyCryptoNotificationEventParams *e);

typedef struct {
  const char *EventID;
  const char *EventParam;
  int reserved;
} PublicKeyCryptoNotificationEventParams;


Unicode (Windows)
virtual INT FireNotification(PublicKeyCryptoNotificationEventParams *e);

typedef struct {
  LPCWSTR EventID;
  LPCWSTR EventParam;
  INT reserved;
} PublicKeyCryptoNotificationEventParams;

#define EID_PUBLICKEYCRYPTO_NOTIFICATION 2

virtual INT SECUREBLACKBOX_CALL FireNotification(LPSTR &lpszEventID, LPSTR &lpszEventParam);

class PublicKeyCryptoNotificationEventParams {
public:
  const QString &EventID();

  const QString &EventParam();

  int EventRetVal();
  void SetEventRetVal(int iRetVal);
};

// To handle, connect one or more slots to this signal.
void Notification(PublicKeyCryptoNotificationEventParams *e);

// Or, subclass PublicKeyCrypto and override this emitter function.
virtual int FireNotification(PublicKeyCryptoNotificationEventParams *e) {...}

Remarks

The class fires this event to let the application know about some event, occurrence, or milestone in the class. For example, it may fire to report completion of the document processing. The list of events being reported is not fixed, and may be flexibly extended over time.

The unique identifier of the event is provided in the EventID parameter. EventParam contains any parameters accompanying the occurrence. Depending on the type of the class, the exact action it is performing, or the document being processed, one or both may be omitted.

SecureBlackboxStream Type

Syntax

SecureBlackboxStream (declared in secureblackbox.h)

Remarks

The PublicKeyCrypto class includes one or more API members that take a stream object as a parameter. To use such API members, create a concrete class that implements the SecureBlackboxStream interface and pass the PublicKeyCrypto class an instance of that concrete class.

When implementing the SecureBlackboxStream interface's properties and methods, they must behave as described below. If the concrete class's implementation does not behave as expected, undefined behavior may occur.

bool CanRead() { return true; }

bool CanSeek() { return true; }

bool CanWrite() { return true; }

int64 GetLength() = 0;

void Close() {}

int Flush() { return 0; }

int Read(void* buffer, int count) = 0;

int64 Seek(int64 offset, int seekOrigin) = 0;

int Write(const void* buffer, int count) = 0;

Config Settings (PublicKeyCrypto Class)

PublicKeyCrypto Config Settings

Base Config Settings

Trappable Errors (PublicKeyCrypto 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.

PublicKeyCrypto Errors