SymmetricCrypto Class

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The SymmetricCrypto class supports encrypting and decrypting messages.

Syntax

SymmetricCrypto

Remarks

SymmetricCrypto allows you to encrypt and decrypt messages.

Property List


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

AssociatedDataProvides Associated Data for AEAD algorithms.
BlockSizeThe block size of the chosen symmetric cipher.
EncryptionAlgorithmThe encryption algorithm to use for encrypting the data.
FIPSModeReserved.
HashAlgorithmThe hash algorithm to use during encryption.
InputEncodingThe encoding to apply to the input data.
KeyThe key to use for the cryptographic operation.
KeySizeReturns the cryptographic key size in bytes.
MACAlgorithmThe (H)MAC algorithm to use during encryption.
ModeSpecifies the symmetric cipher mode of operation.
NonceSpecifies the Nonce value to employ.
OutputEncodingThe encoding to apply to the output data.
PaddingThe padding type to apply to the encrypted data.
PayloadSizeSpecifies the payload size, in bytes.
StreamCipherReturns true if the selected algorithms works as a stream cipher.
TagSizeSpecifies the AEAD tag size, in bytes.

Method List


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

ConfigSets or retrieves a configuration setting.
DecryptDecrypts a buffer.
DecryptFileDecrypts a file.
DecryptFinalFinalization of decryption by blocks.
DecryptInitInitializes a per-block decryption process.
DecryptStreamDecrypts a stream.
DecryptUpdateDecrypts the next block of encrypted data.
DoActionPerforms an additional action.
EncryptEncrypts a buffer.
EncryptFileEncrypts a file.
EncryptFinalFinalization of encryption by blocks.
EncryptInitInitializes a per-block encryption process.
EncryptStreamEncrypts a stream.
EncryptUpdateEncrypts the next block of data.
ResetResets the class settings.

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.

ErrorReports errors during encryption or decryption.
NotificationThis event notifies the application about an underlying control flow event.
ProgressReports the data encryption/decryption progress.

Config Settings


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

CompressSpecifies whether the JSON output should be compressed.
CTRLittleEndianSpecifies whether the little-endian representation should be employed in CTR mode.
TempPathPath for storing temporary files.
CheckKeyIntegrityBeforeUseEnables or disable private key integrity check before use.
CookieCachingSpecifies whether a cookie cache should be used for HTTP(S) transports.
CookiesGets or sets local cookies for the class.
DefDeriveKeyIterationsSpecifies the default key derivation algorithm iteration count.
EnableClientSideSSLFFDHEEnables or disables finite field DHE key exchange support in TLS clients.
GlobalCookiesGets or sets global cookies for all the HTTP transports.
HttpUserAgentSpecifies the user agent name to be used by all HTTP clients.
LogDestinationSpecifies the debug log destination.
LogDetailsSpecifies the debug log details to dump.
LogFileSpecifies the debug log filename.
LogFiltersSpecifies the debug log filters.
LogFlushModeSpecifies the log flush mode.
LogLevelSpecifies the debug log level.
LogMaxEventCountSpecifies the maximum number of events to cache before further action is taken.
LogRotationModeSpecifies the log rotation mode.
MaxASN1BufferLengthSpecifies the maximal allowed length for ASN.1 primitive tag data.
MaxASN1TreeDepthSpecifies the maximal depth for processed ASN.1 trees.
OCSPHashAlgorithmSpecifies the hash algorithm to be used to identify certificates in OCSP requests.
StaticDNSSpecifies whether static DNS rules should be used.
StaticIPAddress[domain]Gets or sets an IP address for the specified domain name.
StaticIPAddressesGets or sets all the static DNS rules.
TagAllows to store any custom data.
TLSSessionGroupSpecifies the group name of TLS sessions to be used for session resumption.
TLSSessionLifetimeSpecifies lifetime in seconds of the cached TLS session.
TLSSessionPurgeIntervalSpecifies how often the session cache should remove the expired TLS sessions.
UseOwnDNSResolverSpecifies whether the client classes should use own DNS resolver.
UseSharedSystemStoragesSpecifies whether the validation engine should use a global per-process copy of the system certificate stores.
UseSystemOAEPAndPSSEnforces or disables the use of system-driven RSA OAEP and PSS computations.
UseSystemRandomEnables or disables the use of the OS PRNG.

AssociatedData Property (SymmetricCrypto Class)

Provides Associated Data for AEAD algorithms.

Syntax

ANSI (Cross Platform)
int GetAssociatedData(char* &lpAssociatedData, int &lenAssociatedData);
int SetAssociatedData(const char* lpAssociatedData, int lenAssociatedData); Unicode (Windows) INT GetAssociatedData(LPSTR &lpAssociatedData, INT &lenAssociatedData);
INT SetAssociatedData(LPCSTR lpAssociatedData, INT lenAssociatedData);
int secureblackbox_symmetriccrypto_getassociateddata(void* lpObj, char** lpAssociatedData, int* lenAssociatedData);
int secureblackbox_symmetriccrypto_setassociateddata(void* lpObj, const char* lpAssociatedData, int lenAssociatedData);
QByteArray GetAssociatedData();
int SetAssociatedData(QByteArray qbaAssociatedData);

Remarks

Use this property to set up Associated Data for AEAD encryption algorithms.

This property is not available at design time.

Data Type

Byte Array

BlockSize Property (SymmetricCrypto Class)

The block size of the chosen symmetric cipher.

Syntax

ANSI (Cross Platform)
int GetBlockSize();

Unicode (Windows)
INT GetBlockSize();
int secureblackbox_symmetriccrypto_getblocksize(void* lpObj);
int GetBlockSize();

Default Value

0

Remarks

This property returns the block size of the chosen symmetric cipher.

Modern symmetric algorithms typically use blocks of 16 bytes. Some older algorithms, such as DES or Blowfish, use 8-byte blocks.

This property is read-only.

Data Type

Integer

EncryptionAlgorithm Property (SymmetricCrypto Class)

The encryption algorithm to use for encrypting the data.

Syntax

ANSI (Cross Platform)
char* GetEncryptionAlgorithm();
int SetEncryptionAlgorithm(const char* lpszEncryptionAlgorithm); Unicode (Windows) LPWSTR GetEncryptionAlgorithm();
INT SetEncryptionAlgorithm(LPCWSTR lpszEncryptionAlgorithm);
char* secureblackbox_symmetriccrypto_getencryptionalgorithm(void* lpObj);
int secureblackbox_symmetriccrypto_setencryptionalgorithm(void* lpObj, const char* lpszEncryptionAlgorithm);
QString GetEncryptionAlgorithm();
int SetEncryptionAlgorithm(QString qsEncryptionAlgorithm);

Default Value

"AES256"

Remarks

This property specifies the base symmetric algorithm to use (e.g. AES128). Use it in conjunction with Mode to set up the complete encryption scheme (such as AES128-CBC or AES128-GCM).

SB_SYMMETRIC_ALGORITHM_RC4RC4
SB_SYMMETRIC_ALGORITHM_DESDES
SB_SYMMETRIC_ALGORITHM_3DES3DES
SB_SYMMETRIC_ALGORITHM_RC2RC2
SB_SYMMETRIC_ALGORITHM_AES128AES128
SB_SYMMETRIC_ALGORITHM_AES192AES192
SB_SYMMETRIC_ALGORITHM_AES256AES256
SB_SYMMETRIC_ALGORITHM_IDENTITYIdentity
SB_SYMMETRIC_ALGORITHM_BLOWFISHBlowfish
SB_SYMMETRIC_ALGORITHM_CAST128CAST128
SB_SYMMETRIC_ALGORITHM_IDEAIDEA
SB_SYMMETRIC_ALGORITHM_TWOFISHTwofish
SB_SYMMETRIC_ALGORITHM_TWOFISH128Twofish128
SB_SYMMETRIC_ALGORITHM_TWOFISH192Twofish192
SB_SYMMETRIC_ALGORITHM_TWOFISH256Twofish256
SB_SYMMETRIC_ALGORITHM_CAMELLIACamellia
SB_SYMMETRIC_ALGORITHM_CAMELLIA128Camellia128
SB_SYMMETRIC_ALGORITHM_CAMELLIA192Camellia192
SB_SYMMETRIC_ALGORITHM_CAMELLIA256Camellia256
SB_SYMMETRIC_ALGORITHM_SERPENTSerpent
SB_SYMMETRIC_ALGORITHM_SERPENT128Serpent128
SB_SYMMETRIC_ALGORITHM_SERPENT192Serpent192
SB_SYMMETRIC_ALGORITHM_SERPENT256Serpent256
SB_SYMMETRIC_ALGORITHM_SEEDSEED
SB_SYMMETRIC_ALGORITHM_RABBITRabbit
SB_SYMMETRIC_ALGORITHM_SYMMETRICGeneric
SB_SYMMETRIC_ALGORITHM_GOST_28147_1989GOST-28147-1989
SB_SYMMETRIC_ALGORITHM_CHACHA20ChaCha20

Data Type

String

FIPSMode Property (SymmetricCrypto Class)

Reserved.

Syntax

ANSI (Cross Platform)
int GetFIPSMode();
int SetFIPSMode(int bFIPSMode); Unicode (Windows) BOOL GetFIPSMode();
INT SetFIPSMode(BOOL bFIPSMode);
int secureblackbox_symmetriccrypto_getfipsmode(void* lpObj);
int secureblackbox_symmetriccrypto_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 (SymmetricCrypto Class)

The hash algorithm to use during encryption.

Syntax

ANSI (Cross Platform)
char* GetHashAlgorithm();
int SetHashAlgorithm(const char* lpszHashAlgorithm); Unicode (Windows) LPWSTR GetHashAlgorithm();
INT SetHashAlgorithm(LPCWSTR lpszHashAlgorithm);
char* secureblackbox_symmetriccrypto_gethashalgorithm(void* lpObj);
int secureblackbox_symmetriccrypto_sethashalgorithm(void* lpObj, const char* lpszHashAlgorithm);
QString GetHashAlgorithm();
int SetHashAlgorithm(QString qsHashAlgorithm);

Default Value

"SHA256"

Remarks

Use this property to provide the hash algorithm to be used with the encryption operation. This only applies to certain encryption algorithms/modes.

SB_HASH_ALGORITHM_SHA1SHA1
SB_HASH_ALGORITHM_SHA224SHA224
SB_HASH_ALGORITHM_SHA256SHA256
SB_HASH_ALGORITHM_SHA384SHA384
SB_HASH_ALGORITHM_SHA512SHA512
SB_HASH_ALGORITHM_MD2MD2
SB_HASH_ALGORITHM_MD4MD4
SB_HASH_ALGORITHM_MD5MD5
SB_HASH_ALGORITHM_RIPEMD160RIPEMD160
SB_HASH_ALGORITHM_CRC32CRC32
SB_HASH_ALGORITHM_SSL3SSL3
SB_HASH_ALGORITHM_GOST_R3411_1994GOST1994
SB_HASH_ALGORITHM_WHIRLPOOLWHIRLPOOL
SB_HASH_ALGORITHM_POLY1305POLY1305
SB_HASH_ALGORITHM_SHA3_224SHA3_224
SB_HASH_ALGORITHM_SHA3_256SHA3_256
SB_HASH_ALGORITHM_SHA3_384SHA3_384
SB_HASH_ALGORITHM_SHA3_512SHA3_512
SB_HASH_ALGORITHM_BLAKE2S_128BLAKE2S_128
SB_HASH_ALGORITHM_BLAKE2S_160BLAKE2S_160
SB_HASH_ALGORITHM_BLAKE2S_224BLAKE2S_224
SB_HASH_ALGORITHM_BLAKE2S_256BLAKE2S_256
SB_HASH_ALGORITHM_BLAKE2B_160BLAKE2B_160
SB_HASH_ALGORITHM_BLAKE2B_256BLAKE2B_256
SB_HASH_ALGORITHM_BLAKE2B_384BLAKE2B_384
SB_HASH_ALGORITHM_BLAKE2B_512BLAKE2B_512
SB_HASH_ALGORITHM_SHAKE_128SHAKE_128
SB_HASH_ALGORITHM_SHAKE_256SHAKE_256
SB_HASH_ALGORITHM_SHAKE_128_LENSHAKE_128_LEN
SB_HASH_ALGORITHM_SHAKE_256_LENSHAKE_256_LEN

Data Type

String

InputEncoding Property (SymmetricCrypto Class)

The encoding to apply to the input data.

Syntax

ANSI (Cross Platform)
int GetInputEncoding();
int SetInputEncoding(int iInputEncoding); Unicode (Windows) INT GetInputEncoding();
INT SetInputEncoding(INT iInputEncoding);

Possible Values

CET_DEFAULT(0), 
CET_BINARY(1),
CET_BASE_64(2),
CET_COMPACT(3),
CET_JSON(4)
int secureblackbox_symmetriccrypto_getinputencoding(void* lpObj);
int secureblackbox_symmetriccrypto_setinputencoding(void* lpObj, int iInputEncoding);
int GetInputEncoding();
int SetInputEncoding(int iInputEncoding);

Default Value

0

Remarks

cetDefault0The default encoding type in current circumstances. This depends on the operation and the type of the key being used.

cetBinary1Raw binary encoding (no encoding)

cetBase642Base64 encoding (armouring)

cetCompact3JSON compact encoding

cetJSON4JSON standard encoding

Data Type

Integer

Key Property (SymmetricCrypto Class)

The key to use for the cryptographic operation.

Syntax

SecureBlackboxCryptoKey* GetKey();
int SetKey(SecureBlackboxCryptoKey* val);
int64 secureblackbox_symmetriccrypto_getkeyhandle(void* lpObj);
int secureblackbox_symmetriccrypto_setkeyhandle(void* lpObj, int64 lKeyHandle);
int secureblackbox_symmetriccrypto_getkeykey(void* lpObj, char** lpKeyKey, int* lenKeyKey);
qint64 GetKeyHandle();
int SetKeyHandle(qint64 lKeyHandle); QByteArray GetKeyKey();

Remarks

Use this property to provide the symmetric key to use for the cryptographic operation. Remember that this key should be of appropriate type and length, and any required additional settings (such as IV or Nonce) should be adjusted where appropriate.

This property is not available at design time.

Data Type

SecureBlackboxCryptoKey

KeySize Property (SymmetricCrypto Class)

Returns the cryptographic key size in bytes.

Syntax

ANSI (Cross Platform)
int GetKeySize();

Unicode (Windows)
INT GetKeySize();
int secureblackbox_symmetriccrypto_getkeysize(void* lpObj);
int GetKeySize();

Default Value

0

Remarks

Use this property to read the cryptographic key size. For the majority of the symmetric algorithms this is hard-coded in the algorithm itself (such as 16 bytes for AES128), but may be variable for certain exceptions, such as Blowfish or RC4.

This property is read-only.

Data Type

Integer

MACAlgorithm Property (SymmetricCrypto Class)

The (H)MAC algorithm to use during encryption.

Syntax

ANSI (Cross Platform)
char* GetMACAlgorithm();
int SetMACAlgorithm(const char* lpszMACAlgorithm); Unicode (Windows) LPWSTR GetMACAlgorithm();
INT SetMACAlgorithm(LPCWSTR lpszMACAlgorithm);
char* secureblackbox_symmetriccrypto_getmacalgorithm(void* lpObj);
int secureblackbox_symmetriccrypto_setmacalgorithm(void* lpObj, const char* lpszMACAlgorithm);
QString GetMACAlgorithm();
int SetMACAlgorithm(QString qsMACAlgorithm);

Default Value

""

Remarks

Use this property to configure the HMAC algorithm to use with the encryption operation. This only applies to a small subset of algorithms/modes.

SB_MAC_ALGORITHM_HMAC_SHA1SHA1
SB_MAC_ALGORITHM_HMAC_SHA256SHA256
SB_MAC_ALGORITHM_HMAC_SHA512SHA512

Data Type

String

Mode Property (SymmetricCrypto Class)

Specifies the symmetric cipher mode of operation.

Syntax

ANSI (Cross Platform)
int GetMode();
int SetMode(int iMode); Unicode (Windows) INT GetMode();
INT SetMode(INT iMode);

Possible Values

SCM_DEFAULT(0), 
SCM_ECB(1),
SCM_CBC(2),
SCM_CTR(3),
SCM_CFB8(4),
SCM_GCM(5),
SCM_CCM(6),
SCM_POLY_1305(7),
SCM_OCB(8)
int secureblackbox_symmetriccrypto_getmode(void* lpObj);
int secureblackbox_symmetriccrypto_setmode(void* lpObj, int iMode);
int GetMode();
int SetMode(int iMode);

Default Value

0

Remarks

Use this property to specify the mode of operation as required by your environment. The default setting is CBC.

scmDefault0The default mode in current circumstances.

scmECB1ECB (electronic code book) mode. This is insecure, unless you know how to use it right.

scmCBC2CBC (cipher block chaining mode)

scmCTR3Counter mode

scmCFB84Cipher feedback mode

scmGCM5Galois counter mode

scmCCM6CCM mode

scmPoly13057Poly1305 mode (only to be used with ChaCha20 algorithm)

scmOCB8OCB mode

Data Type

Integer

Nonce Property (SymmetricCrypto Class)

Specifies the Nonce value to employ.

Syntax

ANSI (Cross Platform)
int GetNonce(char* &lpNonce, int &lenNonce);
int SetNonce(const char* lpNonce, int lenNonce); Unicode (Windows) INT GetNonce(LPSTR &lpNonce, INT &lenNonce);
INT SetNonce(LPCSTR lpNonce, INT lenNonce);
int secureblackbox_symmetriccrypto_getnonce(void* lpObj, char** lpNonce, int* lenNonce);
int secureblackbox_symmetriccrypto_setnonce(void* lpObj, const char* lpNonce, int lenNonce);
QByteArray GetNonce();
int SetNonce(QByteArray qbaNonce);

Remarks

Use this property to specify the Nonce value for the symmetric operation. Not every algorithm or mode uses nonce.

This property is not available at design time.

Data Type

Byte Array

OutputEncoding Property (SymmetricCrypto Class)

The encoding to apply to the output data.

Syntax

ANSI (Cross Platform)
int GetOutputEncoding();
int SetOutputEncoding(int iOutputEncoding); Unicode (Windows) INT GetOutputEncoding();
INT SetOutputEncoding(INT iOutputEncoding);

Possible Values

CET_DEFAULT(0), 
CET_BINARY(1),
CET_BASE_64(2),
CET_COMPACT(3),
CET_JSON(4)
int secureblackbox_symmetriccrypto_getoutputencoding(void* lpObj);
int secureblackbox_symmetriccrypto_setoutputencoding(void* lpObj, int iOutputEncoding);
int GetOutputEncoding();
int SetOutputEncoding(int iOutputEncoding);

Default Value

0

Remarks

cetDefault0The default encoding type in current circumstances. This depends on the operation and the type of the key being used.

cetBinary1Raw binary encoding (no encoding)

cetBase642Base64 encoding (armouring)

cetCompact3JSON compact encoding

cetJSON4JSON standard encoding

Data Type

Integer

Padding Property (SymmetricCrypto Class)

The padding type to apply to the encrypted data.

Syntax

ANSI (Cross Platform)
int GetPadding();
int SetPadding(int iPadding); Unicode (Windows) INT GetPadding();
INT SetPadding(INT iPadding);

Possible Values

SCP_NONE(0), 
SCP_PKCS5(1),
SCP_ANSIX923(2)
int secureblackbox_symmetriccrypto_getpadding(void* lpObj);
int secureblackbox_symmetriccrypto_setpadding(void* lpObj, int iPadding);
int GetPadding();
int SetPadding(int iPadding);

Default Value

1

Remarks

Use this property to specify the padding type to use with the encrypted data. A padding type commonly used in modern security environments is PKCS#5.

scpNone0No padding. You might need to adjust the length of the input data to align it by the encryption block boundary.

scpPKCS51Standard PKCS5 (sometimes also referred to as PKCS7) padding

scpANSIX9232ANSI X.923 padding

Data Type

Integer

PayloadSize Property (SymmetricCrypto Class)

Specifies the payload size, in bytes.

Syntax

ANSI (Cross Platform)
int GetPayloadSize();
int SetPayloadSize(int iPayloadSize); Unicode (Windows) INT GetPayloadSize();
INT SetPayloadSize(INT iPayloadSize);
int secureblackbox_symmetriccrypto_getpayloadsize(void* lpObj);
int secureblackbox_symmetriccrypto_setpayloadsize(void* lpObj, int iPayloadSize);
int GetPayloadSize();
int SetPayloadSize(int iPayloadSize);

Default Value

0

Remarks

Use this property to specify the size of the input data in bytes. This is only used by a subset of algorithms/modes, such as CCM.

Data Type

Integer

StreamCipher Property (SymmetricCrypto Class)

Returns true if the selected algorithms works as a stream cipher.

Syntax

ANSI (Cross Platform)
int GetStreamCipher();

Unicode (Windows)
BOOL GetStreamCipher();
int secureblackbox_symmetriccrypto_getstreamcipher(void* lpObj);
bool GetStreamCipher();

Default Value

FALSE

Remarks

This property returns true if the selected algorithm processes data as a stream (byte-by-byte), rather than block-by-block. This affects the need to use a proper padding settings.

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

Data Type

Boolean

TagSize Property (SymmetricCrypto Class)

Specifies the AEAD tag size, in bytes.

Syntax

ANSI (Cross Platform)
int GetTagSize();
int SetTagSize(int iTagSize); Unicode (Windows) INT GetTagSize();
INT SetTagSize(INT iTagSize);
int secureblackbox_symmetriccrypto_gettagsize(void* lpObj);
int secureblackbox_symmetriccrypto_settagsize(void* lpObj, int iTagSize);
int GetTagSize();
int SetTagSize(int iTagSize);

Default Value

16

Remarks

Use this property to specify/customize the tag size for AEAD encryption.

Data Type

Integer

Config Method (SymmetricCrypto Class)

Sets or retrieves a configuration setting.

Syntax

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

Unicode (Windows)
LPWSTR Config(LPCWSTR lpszConfigurationString);
char* secureblackbox_symmetriccrypto_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 (SymmetricCrypto Class)

Decrypts a buffer.

Syntax

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_symmetriccrypto_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.

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 (SymmetricCrypto Class)

Decrypts a file.

Syntax

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

Unicode (Windows)
INT DecryptFile(LPCWSTR lpszSourceFile, LPCWSTR lpszDestFile);
int secureblackbox_symmetriccrypto_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.)

DecryptFinal Method (SymmetricCrypto Class)

Finalization of decryption by blocks.

Syntax

ANSI (Cross Platform)
char* DecryptFinal(int *lpSize = NULL);

Unicode (Windows)
LPSTR DecryptFinal(LPINT lpSize = NULL);
char* secureblackbox_symmetriccrypto_decryptfinal(void* lpObjint *lpSize);
QByteArray DecryptFinal();

Remarks

Use this method to finalize of decryption by blocks.

Specify decryption key in Key property.

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.

DecryptInit Method (SymmetricCrypto Class)

Initializes a per-block decryption process.

Syntax

ANSI (Cross Platform)
int DecryptInit();

Unicode (Windows)
INT DecryptInit();
int secureblackbox_symmetriccrypto_decryptinit(void* lpObj);
int DecryptInit();

Remarks

Use this method to start a block-by-block decryption process.

Specify the decryption key in Key property before starting the decryption.

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 (SymmetricCrypto Class)

Decrypts a stream.

Syntax

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

Unicode (Windows)
INT DecryptStream(SecureBlackboxStream* sSourceStream, SecureBlackboxStream* sDestStream);
int secureblackbox_symmetriccrypto_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 to another stream.

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

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.)

DecryptUpdate Method (SymmetricCrypto Class)

Decrypts the next block of encrypted data.

Syntax

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

Unicode (Windows)
LPSTR DecryptUpdate(LPCSTR lpBuffer, INT lenBuffer, LPINT lpSize = NULL);
char* secureblackbox_symmetriccrypto_decryptupdate(void* lpObj, const char* lpBuffer, int lenBuffer, int *lpSize);
QByteArray DecryptUpdate(QByteArray qbaBuffer);

Remarks

When using block-by-block decryption, pass every subsequent block of the encrypted message to this method until the entire message is processed. For each encrypted block the method returns a piece of decrypted data.

Please note that in general case there is no direct correspondence between the data actually contained in the encrypted block with the output of this method. The component may choose to cache a piece of the provided buffer internally if it doesn't constitute a full block of encrypted data.

Remember to call DecryptInit before calling this method to prepare the control for the decryption process.

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.

DoAction Method (SymmetricCrypto Class)

Performs an additional action.

Syntax

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

Unicode (Windows)
LPWSTR DoAction(LPCWSTR lpszActionID, LPCWSTR lpszActionParams);
char* secureblackbox_symmetriccrypto_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 (SymmetricCrypto Class)

Encrypts a buffer.

Syntax

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_symmetriccrypto_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 Key property before calling this method.

This is a one-off encryption method. Don't use it with granular per-block methods (EncryptInit, EncryptUpdate, EncryptFinal).

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 (SymmetricCrypto Class)

Encrypts a file.

Syntax

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

Unicode (Windows)
INT EncryptFile(LPCWSTR lpszSourceFile, LPCWSTR lpszDestFile);
int secureblackbox_symmetriccrypto_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 in 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.)

EncryptFinal Method (SymmetricCrypto Class)

Finalization of encryption by blocks.

Syntax

ANSI (Cross Platform)
char* EncryptFinal(int *lpSize = NULL);

Unicode (Windows)
LPSTR EncryptFinal(LPINT lpSize = NULL);
char* secureblackbox_symmetriccrypto_encryptfinal(void* lpObjint *lpSize);
QByteArray EncryptFinal();

Remarks

Use this method to finalize of encryption by blocks.

Specify encryption key in Key property.

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.

EncryptInit Method (SymmetricCrypto Class)

Initializes a per-block encryption process.

Syntax

ANSI (Cross Platform)
int EncryptInit();

Unicode (Windows)
INT EncryptInit();
int secureblackbox_symmetriccrypto_encryptinit(void* lpObj);
int EncryptInit();

Remarks

Use this method to initialize a block-by-block encryption process. Follow it with calls to EncryptUpdate (as many as needed), and complete the encryption with an EncryptFinal call.

Specify the encryption 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.)

EncryptStream Method (SymmetricCrypto Class)

Encrypts a stream.

Syntax

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

Unicode (Windows)
INT EncryptStream(SecureBlackboxStream* sSourceStream, SecureBlackboxStream* sDestStream);
int secureblackbox_symmetriccrypto_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 the Key property before calling this method.

This is a one-off encryption method. Don't use it together with granular per-block encryption methods such as EncryptInit, EncryptUpdate, and EncryptFinal.

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.)

EncryptUpdate Method (SymmetricCrypto Class)

Encrypts the next block of data.

Syntax

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

Unicode (Windows)
LPSTR EncryptUpdate(LPCSTR lpBuffer, INT lenBuffer, LPINT lpSize = NULL);
char* secureblackbox_symmetriccrypto_encryptupdate(void* lpObj, const char* lpBuffer, int lenBuffer, int *lpSize);
QByteArray EncryptUpdate(QByteArray qbaBuffer);

Remarks

Use this method to encrypt the next block of data contained in Buffer.

Call this method after calling EncryptInit for as many times as needed, until the whole volume of data is processed. Having done that, call EncryptFinal to complete the encryption and get the terminating encrypted trailer.

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.

Reset Method (SymmetricCrypto Class)

Resets the class settings.

Syntax

ANSI (Cross Platform)
int Reset();

Unicode (Windows)
INT Reset();
int secureblackbox_symmetriccrypto_reset(void* lpObj);
int Reset();

Remarks

Reset is a generic method available in every class.

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 (SymmetricCrypto Class)

Reports errors during encryption or decryption.

Syntax

ANSI (Cross Platform)
virtual int FireError(SymmetricCryptoErrorEventParams *e);
typedef struct {
int ErrorCode;
const char *Description; int reserved; } SymmetricCryptoErrorEventParams;
Unicode (Windows) virtual INT FireError(SymmetricCryptoErrorEventParams *e);
typedef struct {
INT ErrorCode;
LPCWSTR Description; INT reserved; } SymmetricCryptoErrorEventParams;
#define EID_SYMMETRICCRYPTO_ERROR 1

virtual INT SECUREBLACKBOX_CALL FireError(INT &iErrorCode, LPSTR &lpszDescription);
class SymmetricCryptoErrorEventParams {
public:
  int ErrorCode();

  const QString &Description();

  int EventRetVal();
  void SetEventRetVal(int iRetVal);
};
// To handle, connect one or more slots to this signal. void Error(SymmetricCryptoErrorEventParams *e);
// Or, subclass SymmetricCrypto and override this emitter function. virtual int FireError(SymmetricCryptoErrorEventParams *e) {...}

Remarks

class fires this event in case of exceptional conditions during a cryptographic operation.

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

Notification Event (SymmetricCrypto Class)

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

Syntax

ANSI (Cross Platform)
virtual int FireNotification(SymmetricCryptoNotificationEventParams *e);
typedef struct {
const char *EventID;
const char *EventParam; int reserved; } SymmetricCryptoNotificationEventParams;
Unicode (Windows) virtual INT FireNotification(SymmetricCryptoNotificationEventParams *e);
typedef struct {
LPCWSTR EventID;
LPCWSTR EventParam; INT reserved; } SymmetricCryptoNotificationEventParams;
#define EID_SYMMETRICCRYPTO_NOTIFICATION 2

virtual INT SECUREBLACKBOX_CALL FireNotification(LPSTR &lpszEventID, LPSTR &lpszEventParam);
class SymmetricCryptoNotificationEventParams {
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(SymmetricCryptoNotificationEventParams *e);
// Or, subclass SymmetricCrypto and override this emitter function. virtual int FireNotification(SymmetricCryptoNotificationEventParams *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.

Progress Event (SymmetricCrypto Class)

Reports the data encryption/decryption progress.

Syntax

ANSI (Cross Platform)
virtual int FireProgress(SymmetricCryptoProgressEventParams *e);
typedef struct {
int64 Total;
int64 Current;
int Cancel; int reserved; } SymmetricCryptoProgressEventParams;
Unicode (Windows) virtual INT FireProgress(SymmetricCryptoProgressEventParams *e);
typedef struct {
LONG64 Total;
LONG64 Current;
BOOL Cancel; INT reserved; } SymmetricCryptoProgressEventParams;
#define EID_SYMMETRICCRYPTO_PROGRESS 3

virtual INT SECUREBLACKBOX_CALL FireProgress(LONG64 &lTotal, LONG64 &lCurrent, BOOL &bCancel);
class SymmetricCryptoProgressEventParams {
public:
  qint64 Total();

  qint64 Current();

  bool Cancel();
  void SetCancel(bool bCancel);

  int EventRetVal();
  void SetEventRetVal(int iRetVal);
};
// To handle, connect one or more slots to this signal. void Progress(SymmetricCryptoProgressEventParams *e);
// Or, subclass SymmetricCrypto and override this emitter function. virtual int FireProgress(SymmetricCryptoProgressEventParams *e) {...}

Remarks

This event fires periodically during a file encrypt/decrypt operation to report its progress.

Use the Cancel parameter to terminate the encryption/decryption if needed.

CryptoKey Type

This container represents a cryptographic key.

Syntax

SecureBlackboxCryptoKey (declared in secureblackbox.h)

Remarks

This type is a universal placeholder for cryptographic keys.

Fields

Algorithm
char*

Default Value: ""

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

SB_SYMMETRIC_ALGORITHM_RC4RC4
SB_SYMMETRIC_ALGORITHM_DESDES
SB_SYMMETRIC_ALGORITHM_3DES3DES
SB_SYMMETRIC_ALGORITHM_RC2RC2
SB_SYMMETRIC_ALGORITHM_AES128AES128
SB_SYMMETRIC_ALGORITHM_AES192AES192
SB_SYMMETRIC_ALGORITHM_AES256AES256
SB_SYMMETRIC_ALGORITHM_IDENTITYIdentity
SB_SYMMETRIC_ALGORITHM_BLOWFISHBlowfish
SB_SYMMETRIC_ALGORITHM_CAST128CAST128
SB_SYMMETRIC_ALGORITHM_IDEAIDEA
SB_SYMMETRIC_ALGORITHM_TWOFISHTwofish
SB_SYMMETRIC_ALGORITHM_TWOFISH128Twofish128
SB_SYMMETRIC_ALGORITHM_TWOFISH192Twofish192
SB_SYMMETRIC_ALGORITHM_TWOFISH256Twofish256
SB_SYMMETRIC_ALGORITHM_CAMELLIACamellia
SB_SYMMETRIC_ALGORITHM_CAMELLIA128Camellia128
SB_SYMMETRIC_ALGORITHM_CAMELLIA192Camellia192
SB_SYMMETRIC_ALGORITHM_CAMELLIA256Camellia256
SB_SYMMETRIC_ALGORITHM_SERPENTSerpent
SB_SYMMETRIC_ALGORITHM_SERPENT128Serpent128
SB_SYMMETRIC_ALGORITHM_SERPENT192Serpent192
SB_SYMMETRIC_ALGORITHM_SERPENT256Serpent256
SB_SYMMETRIC_ALGORITHM_SEEDSEED
SB_SYMMETRIC_ALGORITHM_RABBITRabbit
SB_SYMMETRIC_ALGORITHM_SYMMETRICGeneric
SB_SYMMETRIC_ALGORITHM_GOST_28147_1989GOST-28147-1989
SB_SYMMETRIC_ALGORITHM_CHACHA20ChaCha20
SB_HASH_ALGORITHM_SHA1SHA1
SB_HASH_ALGORITHM_SHA224SHA224
SB_HASH_ALGORITHM_SHA256SHA256
SB_HASH_ALGORITHM_SHA384SHA384
SB_HASH_ALGORITHM_SHA512SHA512
SB_HASH_ALGORITHM_MD2MD2
SB_HASH_ALGORITHM_MD4MD4
SB_HASH_ALGORITHM_MD5MD5
SB_HASH_ALGORITHM_RIPEMD160RIPEMD160
SB_HASH_ALGORITHM_CRC32CRC32
SB_HASH_ALGORITHM_SSL3SSL3
SB_HASH_ALGORITHM_GOST_R3411_1994GOST1994
SB_HASH_ALGORITHM_WHIRLPOOLWHIRLPOOL
SB_HASH_ALGORITHM_POLY1305POLY1305
SB_HASH_ALGORITHM_SHA3_224SHA3_224
SB_HASH_ALGORITHM_SHA3_256SHA3_256
SB_HASH_ALGORITHM_SHA3_384SHA3_384
SB_HASH_ALGORITHM_SHA3_512SHA3_512
SB_HASH_ALGORITHM_BLAKE2S_128BLAKE2S_128
SB_HASH_ALGORITHM_BLAKE2S_160BLAKE2S_160
SB_HASH_ALGORITHM_BLAKE2S_224BLAKE2S_224
SB_HASH_ALGORITHM_BLAKE2S_256BLAKE2S_256
SB_HASH_ALGORITHM_BLAKE2B_160BLAKE2B_160
SB_HASH_ALGORITHM_BLAKE2B_256BLAKE2B_256
SB_HASH_ALGORITHM_BLAKE2B_384BLAKE2B_384
SB_HASH_ALGORITHM_BLAKE2B_512BLAKE2B_512
SB_HASH_ALGORITHM_SHAKE_128SHAKE_128
SB_HASH_ALGORITHM_SHAKE_256SHAKE_256
SB_HASH_ALGORITHM_SHAKE_128_LENSHAKE_128_LEN
SB_HASH_ALGORITHM_SHAKE_256_LENSHAKE_256_LEN

Bits
int (read-only)

Default Value: 0

The length of the key in bits.

Curve
char*

Default Value: ""

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

Exportable
int (read-only)

Default Value: FALSE

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

Fingerprint
char* (read-only)

Default Value: ""

Contains the fingerprint (a hash imprint) of this key.

Handle
int64

Default Value: 0

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

ID
char*

Default Value:

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).

IV
char*

Default Value:

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.

Key
char* (read-only)

Default Value:

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

Nonce
char*

Default Value:

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

Private
int (read-only)

Default Value: FALSE

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

Public
int (read-only)

Default Value: FALSE

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

Subject
char*

Default Value:

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

Symmetric
int (read-only)

Default Value: FALSE

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

Valid
int (read-only)

Default Value: FALSE

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.

Constructors

CryptoKey()

Creates an empty crypto key object.

SecureBlackboxStream Type

Syntax

SecureBlackboxStream (declared in secureblackbox.h)

Remarks

The SymmetricCrypto 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 SymmetricCrypto 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.

Properties

CanRead Whether the stream supports reading.

bool CanRead() { return true; }
CanSeek Whether the stream supports seeking.

bool CanSeek() { return true; }
CanWrite Whether the stream supports writing.

bool CanWrite() { return true; }
Length Gets the length of the stream, in bytes.

int64 GetLength() = 0;

Methods

Close Closes the stream, releasing all resources currently allocated for it.

void Close() {}

This method is called automatically when a SecureBlackboxStream object is deleted.

Flush Forces all data held by the stream's buffers to be written out to storage.

int Flush() { return 0; }

Must return 0 if flushing is successful; or -1 if an error occurs or the stream is closed. If the stream does not support writing, this method must do nothing and return 0.

Read Reads a sequence of bytes from the stream and advances the current position within the stream by the number of bytes read.

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

Buffer specifies the buffer to populate with data from the stream. Count specifies the number of bytes that should be read from the stream.

Must return the total number of bytes read into Buffer; this may be less than Count if that many bytes are not currently available, or 0 if the end of the stream has been reached. Must return -1 if an error occurs, if reading is not supported, or if the stream is closed.

Seek Sets the current position within the stream based on a particular point of origin.

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

Offset specifies the offset in the stream to seek to, relative to SeekOrigin. Valid values for SeekOrigin are:

  • 0: Seek from beginning.
  • 1: Seek from current position.
  • 2: Seek from end.

Must return the new position within the stream; or -1 if an error occurs, if seeking is not supported, or if the stream is closed (however, see note below). If -1 is returned, the current position within the stream must remain unchanged.

Note: If the stream is not closed, it must always be possible to call this method with an Offset of 0 and a SeekOrigin of 1 to obtain the current position within the stream, even if seeking is not otherwise supported.

Write Writes a sequence of bytes to the stream and advances the current position within the stream by the number of bytes written.

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

Buffer specifies the buffer with data to write to the stream. Count specifies the number of bytes that should be written to the stream.

Must return the total number of bytes written to the stream; this may be less than Count if that many bytes could not be written. Must return -1 if an error occurs, if writing is not supported, or if the stream is closed.

Config Settings (SymmetricCrypto Class)

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

SymmetricCrypto Config Settings

Compress:   Specifies whether the JSON output should be compressed.

Use this configuration setting to specify that the output should be presented in the compressed form.

CTRLittleEndian:   Specifies whether the little-endian representation should be employed in CTR mode.

Use this setting to enable the little-endian representation when encrypting/decrypting in counter mode.

TempPath:   Path for storing temporary files.

This setting specifies an absolute path to the location on disk where temporary files are stored.

Base Config Settings

CheckKeyIntegrityBeforeUse:   Enables or disable private key integrity check before use.

This global property enables or disables private key material check before each signing operation. This slows down performance a bit, but prevents a selection of attacks on RSA keys where keys with unknown origins are used.

You can switch this property off to improve performance if your project only uses known, good private keys.

CookieCaching:   Specifies whether a cookie cache should be used for HTTP(S) transports.

Set this property to enable or disable cookies caching for the class.

Supported values are:

offNo caching (default)
localLocal caching
globalGlobal caching

Cookies:   Gets or sets local cookies for the class.

Use this property to get cookies from the internal cookie storage of the class and/or restore them back between application sessions.

DefDeriveKeyIterations:   Specifies the default key derivation algorithm iteration count.

This global property sets the default number of iterations for all supported key derivation algorithms. Note that you can provide the required number of iterations by using properties of the relevant key generation component; this global setting is used in scenarios where specific iteration count is not or cannot be provided.

EnableClientSideSSLFFDHE:   Enables or disables finite field DHE key exchange support in TLS clients.

This global property enables or disables support for finite field DHE key exchange methods in TLS clients. FF DHE is a slower algorithm if compared to EC DHE; enabling it may result in slower connections.

This setting only applies to sessions negotiated with TLS version 1.3.

GlobalCookies:   Gets or sets global cookies for all the HTTP transports.

Use this property to get cookies from the GLOBAL cookie storage or restore them back between application sessions. These cookies will be used by all the classes that have its CookieCaching property set to "global".

HttpUserAgent:   Specifies the user agent name to be used by all HTTP clients.

This global setting defines the User-Agent field of the HTTP request provides information about the software that initiates the request. This value will be used by all the HTTP clients including the ones used internally in other classes.

LogDestination:   Specifies the debug log destination.

Contains a comma-separated list of values that specifies where debug log should be dumped.

Supported values are:

fileFile
consoleConsole
systemlogSystem Log (supported for Android only)
debuggerDebugger (supported for VCL for Windows and .Net)

LogDetails:   Specifies the debug log details to dump.

Contains a comma-separated list of values that specifies which debug log details to dump.

Supported values are:

timeCurrent time
levelLevel
packagePackage name
moduleModule name
classClass name
methodMethod name
threadidThread Id
contenttypeContent type
contentContent
allAll details

LogFile:   Specifies the debug log filename.

Use this property to provide a path to the log file.

LogFilters:   Specifies the debug log filters.

Contains a comma-separated list of value pairs ("name:value") that describe filters.

Supported filter names are:

exclude-packageExclude a package specified in the value
exclude-moduleExclude a module specified in the value
exclude-classExclude a class specified in the value
exclude-methodExclude a method specified in the value
include-packageInclude a package specified in the value
include-moduleInclude a module specified in the value
include-classInclude a class specified in the value
include-methodInclude a method specified in the value

LogFlushMode:   Specifies the log flush mode.

Use this property to set the log flush mode. The following values are defined:

noneNo flush (caching only)
immediateImmediate flush (real-time logging)
maxcountFlush cached entries upon reaching LogMaxEventCount entries in the cache.

LogLevel:   Specifies the debug log level.

Use this property to provide the desired debug log level.

Supported values are:

noneNone (by default)
fatalSevere errors that cause premature termination.
errorOther runtime errors or unexpected conditions.
warningUse of deprecated APIs, poor use of API, 'almost' errors, other runtime situations that are undesirable or unexpected, but not necessarily "wrong".
infoInteresting runtime events (startup/shutdown).
debugDetailed information on flow of through the system.
traceMore detailed information.

LogMaxEventCount:   Specifies the maximum number of events to cache before further action is taken.

Use this property to specify the log event number threshold. This threshold may have different effects, depending on the rotation setting and/or the flush mode.

The default value of this setting is 100.

LogRotationMode:   Specifies the log rotation mode.

Use this property to set the log rotation mode. The following values are defined:

noneNo rotation
deleteolderDelete older entries from the cache upon reaching LogMaxEventCount
keepolderKeep older entries in the cache upon reaching LogMaxEventCount (newer entries are discarded)

MaxASN1BufferLength:   Specifies the maximal allowed length for ASN.1 primitive tag data.

This global property limits the maximal allowed length for ASN.1 tag data for non-content-carrying structures, such as certificates, CRLs, or timestamps. It does not affect structures that can carry content, such as CMS/CAdES messages. This is a security property aiming at preventing DoS attacks.

MaxASN1TreeDepth:   Specifies the maximal depth for processed ASN.1 trees.

This global property limits the maximal depth of ASN.1 trees that the component can handle without throwing an error. This is a security property aiming at preventing DoS attacks.

OCSPHashAlgorithm:   Specifies the hash algorithm to be used to identify certificates in OCSP requests.

This global setting defines the hash algorithm to use in OCSP requests during chain validation. Some OCSP responders can only use older algorithms, in which case setting this property to SHA1 may be helpful.

StaticDNS:   Specifies whether static DNS rules should be used.

Set this property to enable or disable static DNS rules for the class. Works only if UseOwnDNSResolver is set to true.

Supported values are:

noneNo static DNS rules (default)
localLocal static DNS rules
globalGlobal static DNS rules

StaticIPAddress[domain]:   Gets or sets an IP address for the specified domain name.

Use this property to get or set an IP address for the specified domain name in the internal (of the class) or global DNS rules storage depending on the StaticDNS value. The type of the IP address (IPv4 or IPv6) is determined automatically. If both addresses are available, they are devided by the | (pipe) character.

StaticIPAddresses:   Gets or sets all the static DNS rules.

Use this property to get static DNS rules from the current rules storage or restore them back between application sessions. If StaticDNS of the class is set to "local", the property returns/restores the rules from/to the internal storage of the class. If StaticDNS of the class is set to "global", the property returns/restores the rules from/to the GLOBAL storage. The rules list is returned and accepted in JSON format.

Tag:   Allows to store any custom data.

Use this config property to store any custom data.

TLSSessionGroup:   Specifies the group name of TLS sessions to be used for session resumption.

Use this property to limit the search of chached TLS sessions to the specified group. Sessions from other groups will be ignored. By default, all sessions are cached with an empty group name and available to all the classes.

TLSSessionLifetime:   Specifies lifetime in seconds of the cached TLS session.

Use this property to specify how much time the TLS session should be kept in the session cache. After this time, the session expires and will be automatically removed from the cache. Default value is 300 seconds (5 minutes).

TLSSessionPurgeInterval:   Specifies how often the session cache should remove the expired TLS sessions.

Use this property to specify the time interval of purging the expired TLS sessions from the session cache. Default value is 60 seconds (1 minute).

UseOwnDNSResolver:   Specifies whether the client components should use own DNS resolver.

Set this global property to false to force all the client components to use the DNS resolver provided by the target OS instead of using own one.

UseSharedSystemStorages:   Specifies whether the validation engine should use a global per-process copy of the system certificate stores.

Set this global property to false to make each validation run use its own copy of system certificate stores.

UseSystemOAEPAndPSS:   Enforces or disables the use of system-driven RSA OAEP and PSS computations.

This global setting defines who is responsible for performing RSA-OAEP and RSA-PSS computations where the private key is stored in a Windows system store and is exportable. If set to true, SBB will delegate the computations to Windows via a CryptoAPI call. Otherwise, it will export the key material and perform the computations using its own OAEP/PSS implementation.

This setting only applies to certificates originating from a Windows system store.

UseSystemRandom:   Enables or disables the use of the OS PRNG.

Use this global property to enable or disable the use of operating system-driven pseudorandom number generation.

Trappable Errors (SymmetricCrypto 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.

SymmetricCrypto Errors

1048577   Invalid parameter (SB_ERROR_INVALID_PARAMETER)
1048578   Invalid configuration (SB_ERROR_INVALID_SETUP)
1048579   Invalid state (SB_ERROR_INVALID_STATE)
1048580   Invalid value (SB_ERROR_INVALID_VALUE)
1048581   Private key not found (SB_ERROR_NO_PRIVATE_KEY)
1048582   Cancelled by the user (SB_ERROR_CANCELLED_BY_USER)
1048583   The file was not found (SB_ERROR_NO_SUCH_FILE)
1048584   Unsupported feature or operation (SB_ERROR_UNSUPPORTED_FEATURE)
1048585   General error (SB_ERROR_GENERAL_ERROR)