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Man Pages


Manual Reference Pages  -  TSPI_HASH_GETHASHVALUE (3)

TCG Software Stack Developer’s Reference

NAME

Tspi_Hash_GetHashValue - get the current hash value of a hash object

CONTENTS

SYNOPSIS


#include <tss/platform.h> 

#include <tss/tcpa_defines.h> 

#include <tss/tcpa_typedef.h> 

#include <tss/tcpa_struct.h> 

#include <tss/tss_typedef.h> 

#include <tss/tss_structs.h> 

#include <tss/tspi.h> 

TSS_RESULT Tspi_Hash_GetHashValue(TSS_HHASH hHash, UINT32* pulHashValueLength, BYTE** prgbHashValue);

DESCRIPTION

Tspi_Hash_GetHashValue gets the hash value of a hash object. Tspi_Context_FreeMemory must be used to clean up after this function, as memory is allocated for the prgbHashValue data.

PARAMETERS

    hHash

The handle to the hash object instance whose hash value should be signed.

    pulHashValueLength

Receives the length of the hash value data returned at the parameter prgbHashValue.

    prgbHashValue

Receives a pointer to the hash value data.

RETURN CODES

Tspi_Hash_GetHashValue returns TSS_SUCCESS on success, otherwise one of the following values is returned:
TSS_E_INVALID_HANDLE
  hHash is not a valid handle.

TSS_E_INTERNAL_ERROR
  An internal SW error has been detected.

TSS_E_BAD_PARAMETER
  One or more parameters is bad.

TSS_E_HASH_INVALID_LENGTH
  Hash length is inconsistent with hash algorithm.

TSS_E_HASH_NO_DATA
  Hash object has no internal hash value.

CONFORMING TO

Tspi_Hash_GetHashValue conforms to the Trusted Computing Group Software Specification version 1.1 Golden

SEE ALSO

Tspi_Hash_UpdateHash(3), Tspi_Hash_Sign(3), Tspi_Hash_VerifySignature(3), Tspi_Hash_SetHashValue(3).

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TSS 1.1 TSPI_HASH_GETHASHVALUE (3) 2004-05-25

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