SHA256GetTag
SHA256GetTag
Computes the current SHA-256 digest value of the processed part of the message.
Syntax
IppStatus ippsSHA256GetTag(Ipp8u*
pTag
, Ipp32u
tagLen
, const IppsSHA256State*
pCtx
);
Include Files
ippcp.h
Parameters
- pTag
- Pointer to the authentication tag.
- tagLen
- Length of the tag (in bytes).
- pCtx
- Pointer to theIppsSHA265Statecontext.
Description
The function computes the message digest based on the current context as specified in [FIPS PUB 180-2] and [RFC 1321]. A call to this function retains the possibility to update the digest.
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.