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_Sign - sign the hash data of an object with a signing key

 #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_Sign(TSS_HHASH " hHash ", TSS_HKEY " hKey ","  " UINT32 " pulSignatureLength ", BYTE** " prgbSignature ");" 

Tspi_Hash_Sign signs the hash data of an object with a given signing key. The data must be set at the hash instance associated with hHash by calling Tspi_Hash_SetHashValue or Tspi_Hash_UpdateHashValue. The Tspi_Hash_Sign method allocates a memory block for the prgbSignature data. This memory must be released using Tspi_Context_FreeMemory.

The handle to the hash object instance whose hash value should be signed. Handle to the key object which should be used for the signature. Receives the length of the signature data returned at the parameter prgbSignature on successful completion. Receives a pointer to the signature data on successful completion.

Tspi_Hash_Sign returns TSS_SUCCESS on success, otherwise one of the following values is returned:

TSS_E_INVALID_HANDLE hKey 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.

TSS_E_HASH_NO_IDENTIFIER The hash algorithm identifier is not set.

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

Tspi_Hash_UpdateHashValue(3), Tspi_Hash_SetHashValue(3), Tspi_Hash_VerifySignature(3).