HashGetTag
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 theIppsHashStateorIppsHashState_rmfcontext.
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.
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 isNULL.
- ippStsLengthErr
- Indicates an error condition iftagLen< 1 ortagLenexceeds the maximal length of a particular digest.
- ippStsContextMatchErr
- Indicates an error condition if the context parameter does not match the operation.