Visible to Intel only — GUID: GUID-6BECA396-3BDA-433E-9499-48C3E7E64F8A
Visible to Intel only — GUID: GUID-6BECA396-3BDA-433E-9499-48C3E7E64F8A
SMS4EncryptOFB
Encrypts a variable length data stream using SMS4 block cipher in the OFB mode.
Syntax
IppStatus ippsSMS4EncryptOFB (const Ipp8u* pSrc, Ipp8u* pDst, int len, int ofbBlkSize, const IppsSMS4Spec* pCtx, Ipp8u* pIV);
Include Files
ippcp.h
Parameters
pSrc |
Pointer to the input plaintext data stream of variable length. |
pDst |
Pointer to the resulting ciphertext data stream. |
len |
Length of the plaintext data stream in bytes. |
ofbBlkSize |
Size of the OFB block in bytes. |
pCtx |
Pointer to the IppsSMS4Spec context. |
pIV |
Pointer to the initialization vector for the OFB mode operation. |
Description
The function encrypts 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 len is 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. |