HashGetTag¶
Computes the current digest value of the processed part of the message.
Syntax¶
IppStatus ippsHashGetTag(Ipp8u* pTag, int tagLen, const IppsHashState* pCtx);
IppStatus ippsHashGetTag_rmf(Ipp8u* pTag, int tagLen, ippsHashState_rmf* pCtx);
Include Files¶
ippcp.h
Parameters¶
pTag |
Pointer to the authentication tag. |
tagLen |
The length of the tag (in bytes). |
pCtx |
Pointer to the IppsHashState or IppsHashState_rmf context. |
Description¶
The function computes the message digest based on the current context as specified in [FIPS PUB 180-2], [FIPS PUB 180-4] and [RFC 1321]. A call to this function retains the possibility to update the digest.
Note
This function has a reduced memory footprint version. To learn more, see Reduced Memory Footprint Functions.
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 tagLen < 1 or tagLen exceeds the maximal length of a particular digest. |
ippStsContextMatchErr |
Indicates an error condition if the context parameter does not match the operation. |