AESDecryptCBC_CS¶
Decrypts plaintext in the CBC ciphertext stealing mode of the AES block cipher.
Syntax¶
IppStatus ippsAESDecryptCBC_CS1(const Ipp8u* pSrc, Ipp8u* pDst, int len, const IppsAESSpec* pCtx, const Ipp8u* pIV);
IppStatus ippsAESDecryptCBC_CS2(const Ipp8u* pSrc, Ipp8u* pDst, int len, const IppsAESSpec* pCtx, const Ipp8u* pIV);
IppStatus ippsAESDecryptCBC_CS3(const Ipp8u* pSrc, Ipp8u* pDst, int len, const IppsAESSpec* pCtx, const Ipp8u* pIV);
Include Files¶
ippcp.h
Parameters¶
pSrc |
Pointer to the input ciphertext data of variable length. |
pDst |
Pointer to the resulting plaintext data. |
len |
Length of the input data stream in bytes. |
pCtx |
Pointer to the IppsAESSpec context. |
pIV |
Pointer to the initialization vector for the CBC mode operation. |
Description¶
These functions decrypt the input data stream according to the three variants of the Cipher Block Chaining (CBC) mode with Ciphertext Stealing (CS), as specified in [NIST SP 800-38A A.].
Return Values¶
ippStsNoErr |
Indicates no error. Any other value indicates an error or warning. |
ippStsNullPtrErr |
Indicates an error condition if any of the specified pointers is NULL. |
ippStsLengthErr |
For AESDecryptCBC_CS1 and AESDecryptCBC_CS2, indicates an error condition if the input data length is less than the cipher block size. For AESDecryptCBC_CS3, indicates an error condition if the input data length is less than or equal to the cipher block size. |
ippStsContextMatchErr |
Indicates an error condition if the context parameter does not match the operation. |