Tspi_Data_Unseal - dencrypt data encrypted by Tspi_Data_Seal() only if it was encrypted on the same

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

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

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

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.

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.

Tspi_Data_Seal(3).

TSS 1.1                                            2004-05-26                                Tspi_Data_Unseal(3)

#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_RESULTTspi_Data_Unseal(TSS_HENCDATAhEncData,TSS_HKEYhKey,UINT32pulUnsealedDataLength,BYTE**prgbUnsealedData);