Visible to Intel only — GUID: GUID-CA8FB694-ABC5-4346-BB03-82FF941BDA6E
Visible to Intel only — GUID: GUID-CA8FB694-ABC5-4346-BB03-82FF941BDA6E
AESDecryptOFB
Developer Reference for Intel® Cryptography Primitives Library
Decrypts a variable length data stream according to AES in the OFB mode.
Syntax
IppStatus ippsAESDecryptOFB (const Ipp8u* pSrc, Ipp8u* pDst, int srclen, int ofbBlkSize, const IppsAESSpec* pCtx, Ipp8u* pIV);
Include Files
ippcp.h
Parameters
pSrc |
Pointer to the input ciphertext data stream of variable length. |
pDst |
Pointer to the resulting plaintext data stream. |
srclen |
Length of the ciphertext data stream in bytes. |
ofbBlkSize |
Size of the OFB block in bytes. |
pCtx |
Pointer to the IppsAESSpec context. |
pIV |
Pointer to the initialization vector for the OFB mode operation. |
Description
The function decrypts the input data stream of a variable length in the OFB mode as specified in NIST SP 800-38A.
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 |
Indicates an error condition if the input data stream length is less than or equal to zero. |
ippStsUnderRunErr |
Indicates an error condition if srclenis not divisible by the ofbBlkSize parameter value. |
ippStsOFBSizeErr |
Indicates an error condition if the value of ofbBlkSize is illegal. |
ippStsContextMatchErr |
Indicates an error condition if the context parameter does not match the operation. |