SMS4DecryptCBC_CS¶
Decrypts plaintext in the CBC ciphertext stealing mode of the SMS4 block cipher.
Syntax¶
IppStatus ippsSMS4DecryptCBC_CS1(const Ipp8u* pSrc, Ipp8u* pDst, int len, const IppsSMS4Spec* pCtx, const Ipp8u* pIV);
IppStatus ippsSMS4DecryptCBC_CS2(const Ipp8u* pSrc, Ipp8u* pDst, int len, const IppsSMS4Spec* pCtx, const Ipp8u* pIV);
IppStatus ippsSMS4DecryptCBC_CS3(const Ipp8u* pSrc, Ipp8u* pDst, int len, const IppsSMS4Spec* 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 length in bytes. |
pCtx |
Pointer to the IppsSMS4Spec 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 |
|
ippStsContextMatchErr |
Indicates an error condition if the context parameter does not match the operation. |