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Tspi_Data_Unseal(3)TCG Software Stack Developer's ReferenceTspi_Data_Unseal(3)

NAME
       Tspi_Data_Unseal	 - dencrypt data encrypted by Tspi_Data_Seal() only if
       it was encrypted on the same platform and under the current  configura‐
       tion.

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_Data_Unseal(TSS_HENCDATA hEncData,	       TSS_HKEY hKey,
				   UINT32	pulUnsealedDataLength, BYTE**	prgbUnsealedData);

DESCRIPTION
       Tspi_Data_Unseal	 reveals  data encrypted by the Tspi_Data_Seal only if
       it was encrypted on the same platform and  the  current	configuration.
       This is internally proofed and guaranteed by the TPM.

PARAMETERS
   hEncData
       Handle of the data object which contains the sealed data.

   hKey
       Handle to the key object addressing the nonmigratable key which is used
       to decrypt the data.

   pulUnsealedDataLength
       The length (in bytes) of the prgbUnsealedData parameter.

   prgbUnsealedData
       On successful completion of the command, this  parameter	 points	 to  a
       buffer containing the plaintext data.

   hPcrComposite
       Handle  of  the PCR Composite object specifying the PCRs which are part
       of the sealed data blob. Set to NULL, if the encrypted data should only
       be bound to the system and PCRs are not of interest.

RETURN CODES
       Tspi_Data_Unseal	 returns  TSS_SUCCESS on success, otherwise one of the
       following values are returned:

       TSS_E_INVALID_HANDLE - Either hEncData or hKey is not a valid handle.

       TSS_E_INTERNAL_ERROR - An error occurred internal to the TSS.

CONFORMING TO
       Tspi_Data_Unseal conforms to the Trusted Computing Group Software Spec‐
       ification version 1.1 Golden

SEE ALSO
       Tspi_Data_Seal(3).

TSS 1.1				  2004-05-26		   Tspi_Data_Unseal(3)

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