Visible to Intel only — GUID: GUID-7DF351AD-B919-4D54-89F2-34759CAE7430
Visible to Intel only — GUID: GUID-7DF351AD-B919-4D54-89F2-34759CAE7430
TDESDecryptOFB
Decrypts a variable length data stream according to the TDES algorithm in the OFB mode (deprecated).
Syntax
IppStatus ippsTDESDecryptOFB (const Ipp8u* pSrc, Ipp8u* pDst, int len, int ofbBlkSize, const IppsDESSpec *pCtx1, const IppsDESSpec * pCtx2, const IppsDESSpec *pCtx3, 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. |
len |
Length of the ciphertext data stream in bytes. |
ofbBlkSize |
Size of the OFB block in bytes. |
pCtx1 |
First set of round keys scheduled for TDES internal operations. |
pCtx2 |
Second set of round keys scheduled for TDES internal operations. |
pCtx3 |
Third set of round keys scheduled for TDES internal operations. |
pIV |
Pointer to the initialization vector for the OFB mode operation. |
Description
This 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 lenis 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. |