Copyright (C) 2004 International Business Machines Corporation
Written by Megan Schneider based on the Trusted Computing Group Software Stack Specification Version 1.1 Golden

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1 TCG Software Stack Developer's Reference

Tspi_Hash_UpdateHashValue - update the hash value of a hash object

 #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_UpdateHashValue(TSS_HHASH " hHash ", UINT32 " ulDataLength ", BYTE* " rgbData ");" 

Tspi_Hash_UpdateHashValue updates the hash value of a hash object with new information. If the object was created with the flag TSS_HASH_OTHER, then this method will return an error. The object can't be modified after Tspi_Hash_SetHashValue, Tspi_Hash_GetHashValue, Tspi_Hash_Sign, or Tspi_Hash_VerifySignature have been called on it.

The handle to the hash object instance whose hash value should be signed. Indicates the length of the data provided at the parameter rgbData. A pointer to the data.

Tspi_Hash_UpdateHashValue 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.

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

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