HMACSHA512GetTag

Computes the current HMAC value of the processed part of the message.

Syntax

IppStatus ippsHMACSHA512GetTag(Ipp8u* pDstTag, Ipp32u tagLen, const IppsHMACSHA512State* pState);

Parameters

pDstTag

Pointer to the authentication tag.

tagLen

Length of the tag (in bytes).

pState

Pointer to the IppsHMACSHA512State context.

Description

This function is declared in the ippcp.h file. The function computes the message digest based on the current context as specified in [FIPS PUB 198]. 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 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.

See Also

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