gwenhywfar
4.8.0beta
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These functions are used for padding when encrypting/decrypting data using 2-key-triple-DES or when signing data. The original code (in C++) has been written by Fabian Kaiser for OpenHBCI (file rsakey.cpp). Translated to C and slightly modified by me (Martin Preuss)
GWENHYWFAR_API int GWEN_Padd_AddPkcs1Pss | ( | uint8_t * | pDestBuffer, |
uint32_t | lDestBuffer, | ||
uint32_t | nbits, | ||
const uint8_t * | pHash, | ||
uint32_t | lHash, | ||
uint32_t | lSalt, | ||
GWEN_MDIGEST * | md | ||
) |
nbits | number of actual bits of the modulus |
Definition at line 477 of file padd.c.
References DBG_INFO, GWEN_Crypt_Random(), GWEN_LOGDOMAIN, GWEN_MDigest_Begin(), GWEN_MDigest_End(), GWEN_MDigest_GetDigestPtr(), GWEN_MDigest_GetDigestSize(), GWEN_MDigest_Update(), GWEN_Padd_MGF1(), NULL, and nullarray.
Referenced by GWEN_Crypt_TokenFile__Sign().
GWENHYWFAR_API int GWEN_Padd_ApplyPaddAlgo | ( | const GWEN_CRYPT_PADDALGO * | a, |
GWEN_BUFFER * | src | ||
) |
Definition at line 746 of file padd.c.
References DBG_ERROR, DBG_INFO, GWEN_Buffer_FillLeftWithBytes(), GWEN_Buffer_FillWithBytes(), GWEN_Buffer_GetUsedBytes(), GWEN_Crypt_PaddAlgo_GetId(), GWEN_Crypt_PaddAlgo_GetPaddSize(), GWEN_CRYPT_PADDALGOID, GWEN_Crypt_PaddAlgoId_toString(), GWEN_ERROR_GENERIC, GWEN_ERROR_INVALID, GWEN_ERROR_NOT_AVAILABLE, GWEN_LOGDOMAIN, GWEN_Padd_PaddWithAnsiX9_23(), GWEN_Padd_PaddWithISO9796(), GWEN_Padd_PaddWithIso9796_2(), GWEN_Padd_PaddWithPkcs1Bt1(), and GWEN_Padd_PaddWithPkcs1Bt2().
Referenced by GWEN_Crypt_TokenFile__Encipher(), GWEN_Crypt_TokenFile__Sign(), and GWEN_Crypt_TokenFile__Verify().
GWENHYWFAR_API int GWEN_Padd_MGF1 | ( | uint8_t * | pDestBuffer, |
uint32_t | lDestBuffer, | ||
const uint8_t * | pSeed, | ||
uint32_t | lSeed, | ||
GWEN_MDIGEST * | md | ||
) |
Definition at line 419 of file padd.c.
References DBG_INFO, GWEN_LOGDOMAIN, GWEN_MDigest_Begin(), GWEN_MDigest_End(), GWEN_MDigest_GetDigestPtr(), GWEN_MDigest_GetDigestSize(), and GWEN_MDigest_Update().
Referenced by GWEN_Padd_AddPkcs1Pss(), and GWEN_Padd_VerifyPkcs1Pss().
GWENHYWFAR_API int GWEN_Padd_PaddWithAnsiX9_23 | ( | GWEN_BUFFER * | src | ) |
This is a compatibility function (calls GWEN_Padd_PaddWithAnsiX9_23ToMultipleOf with param y=8).
Definition at line 264 of file padd.c.
References GWEN_Padd_PaddWithAnsiX9_23ToMultipleOf().
Referenced by GWEN_CryptMgr_Encrypt(), and GWEN_Padd_ApplyPaddAlgo().
GWENHYWFAR_API int GWEN_Padd_PaddWithAnsiX9_23ToMultipleOf | ( | GWEN_BUFFER * | src, |
int | y | ||
) |
This function is used to pad the plain text data to a multiple of 8 bytes size before encrypting it. This is done by adding bytes to the buffer until its length is multiple of Y bytes. The byte added is the number of padding bytes appended. Example: Y is 8, buffer initially contains 5 bytes, so 3 bytes are needed to make the buffer length a multiple of 8. So the number "3" is added three times. Please note that if the buffer initially has a multiple of Y bytes then Y bytes are added (this is needed to make sure the unpadd function can always recover data padded in this manner).
Definition at line 227 of file padd.c.
References GWEN_Buffer_AppendByte(), and GWEN_Buffer_GetUsedBytes().
Referenced by GWEN_Padd_PaddWithAnsiX9_23().
GWENHYWFAR_API int GWEN_Padd_PaddWithISO9796 | ( | GWEN_BUFFER * | src | ) |
This function padds the given buffer according to ISO9796. The given buffer is expected to contain a 20 byte hash created using RIPEMD 160. This is padded to 96 bytes according to ISO 9796 (including appendix A4).
Definition at line 74 of file padd.c.
References DBG_INFO, GWEN_Buffer_AppendBytes(), GWEN_Buffer_Crop(), GWEN_Buffer_GetStart(), GWEN_Buffer_GetUsedBytes(), GWEN_Buffer_Reset(), GWEN_LOGDOMAIN, and GWEN_Padd_permutate().
Referenced by GWEN_Padd_ApplyPaddAlgo().
GWENHYWFAR_API int GWEN_Padd_PaddWithIso9796_2 | ( | GWEN_BUFFER * | buf, |
int | dstSize | ||
) |
This function padds according to ISO 8786-2.
Definition at line 145 of file padd.c.
References DBG_ERROR, GWEN_Buffer_AppendByte(), GWEN_Buffer_GetStart(), GWEN_Buffer_GetUsedBytes(), GWEN_Buffer_InsertRoom(), GWEN_Buffer_Rewind(), GWEN_Crypt_Random(), GWEN_ERROR_GENERIC, GWEN_ERROR_INVALID, and GWEN_LOGDOMAIN.
Referenced by check2(), GWEN_CryptMgrKeys_EncryptKey(), GWEN_CryptMgrKeys_SignData(), GWEN_Padd_ApplyPaddAlgo(), and GWEN_SmallTresor_Encrypt().
GWENHYWFAR_API int GWEN_Padd_PaddWithPkcs1Bt1 | ( | GWEN_BUFFER * | src, |
int | dstSize | ||
) |
Definition at line 276 of file padd.c.
References DBG_ERROR, GWEN_Buffer_GetStart(), GWEN_Buffer_GetUsedBytes(), GWEN_Buffer_InsertRoom(), GWEN_Buffer_Rewind(), GWEN_ERROR_GENERIC, GWEN_ERROR_INVALID, and GWEN_LOGDOMAIN.
Referenced by GWEN_Padd_ApplyPaddAlgo().
GWENHYWFAR_API int GWEN_Padd_PaddWithPkcs1Bt2 | ( | GWEN_BUFFER * | src, |
int | dstSize | ||
) |
Definition at line 314 of file padd.c.
References DBG_ERROR, GWEN_Buffer_GetStart(), GWEN_Buffer_GetUsedBytes(), GWEN_Buffer_InsertRoom(), GWEN_Buffer_Rewind(), GWEN_Crypt_Random(), GWEN_ERROR_GENERIC, GWEN_ERROR_INVALID, and GWEN_LOGDOMAIN.
Referenced by GWEN_Padd_ApplyPaddAlgo().
GWENHYWFAR_API int GWEN_Padd_UnapplyPaddAlgo | ( | const GWEN_CRYPT_PADDALGO * | a, |
GWEN_BUFFER * | buf | ||
) |
Definition at line 831 of file padd.c.
References DBG_ERROR, DBG_INFO, GWEN_Crypt_PaddAlgo_GetId(), GWEN_CRYPT_PADDALGOID, GWEN_Crypt_PaddAlgoId_toString(), GWEN_ERROR_GENERIC, GWEN_ERROR_NOT_AVAILABLE, GWEN_LOGDOMAIN, GWEN_Padd_UnpaddWithAnsiX9_23(), GWEN_Padd_UnpaddWithIso9796_2(), GWEN_Padd_UnpaddWithPkcs1Bt1(), and GWEN_Padd_UnpaddWithPkcs1Bt2().
Referenced by GWEN_Crypt_TokenFile__Decipher(), and GWEN_Crypt_TokenFile__Verify().
GWENHYWFAR_API int GWEN_Padd_UnpaddWithAnsiX9_23 | ( | GWEN_BUFFER * | src | ) |
This is a compatibility function (calls GWEN_Padd_UnpaddWithAnsiX9_23FromMultipleOf with param y=8).
Definition at line 270 of file padd.c.
References GWEN_Padd_UnpaddWithAnsiX9_23FromMultipleOf().
Referenced by GWEN_CryptMgr_Decrypt(), and GWEN_Padd_UnapplyPaddAlgo().
GWENHYWFAR_API int GWEN_Padd_UnpaddWithAnsiX9_23FromMultipleOf | ( | GWEN_BUFFER * | src, |
int | y | ||
) |
This function is used to remove padding from plain text data after decrypting it.
Definition at line 239 of file padd.c.
References DBG_ERROR, GWEN_Buffer_Crop(), GWEN_Buffer_GetStart(), GWEN_Buffer_GetUsedBytes(), GWEN_Buffer_SetPos(), and GWEN_LOGDOMAIN.
Referenced by GWEN_Padd_UnpaddWithAnsiX9_23().
GWENHYWFAR_API int GWEN_Padd_UnpaddWithIso9796_2 | ( | GWEN_BUFFER * | buf | ) |
Definition at line 192 of file padd.c.
References DBG_ERROR, GWEN_Buffer_Crop(), GWEN_Buffer_GetStart(), GWEN_Buffer_GetUsedBytes(), GWEN_ERROR_BAD_DATA, GWEN_ERROR_INVALID, and GWEN_LOGDOMAIN.
Referenced by check2(), GWEN_CryptMgrKeys_DecryptKey(), GWEN_CryptMgrKeys_VerifyData(), GWEN_Padd_UnapplyPaddAlgo(), and GWEN_SmallTresor_Decrypt().
GWENHYWFAR_API int GWEN_Padd_UnpaddWithPkcs1Bt1 | ( | GWEN_BUFFER * | src | ) |
Definition at line 407 of file padd.c.
References GWEN_Padd__UnpaddWithPkcs1Bt1Or2().
Referenced by GWEN_Padd_UnapplyPaddAlgo().
GWENHYWFAR_API int GWEN_Padd_UnpaddWithPkcs1Bt2 | ( | GWEN_BUFFER * | src | ) |
Definition at line 413 of file padd.c.
References GWEN_Padd__UnpaddWithPkcs1Bt1Or2().
Referenced by GWEN_Padd_UnapplyPaddAlgo().
GWENHYWFAR_API int GWEN_Padd_VerifyPkcs1Pss | ( | const uint8_t * | pSrcBuffer, |
uint32_t | lSrcBuffer, | ||
uint32_t | nbits, | ||
const uint8_t * | pHash, | ||
uint32_t | lHash, | ||
uint32_t | lSalt, | ||
GWEN_MDIGEST * | md | ||
) |
Definition at line 600 of file padd.c.
References DBG_ERROR, DBG_INFO, GWEN_ERROR_BAD_DATA, GWEN_ERROR_VERIFY, GWEN_LOGDOMAIN, GWEN_MDigest_Begin(), GWEN_MDigest_End(), GWEN_MDigest_GetDigestPtr(), GWEN_MDigest_GetDigestSize(), GWEN_MDigest_Update(), GWEN_Padd_MGF1(), and nullarray.
Referenced by GWEN_Crypt_TokenFile__Verify().