NAME

       Tspi_Data_Unbind - Decrypts data that has been bound to a key

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_Unbind(TSS_HENCDATA hEncData,             TSS_HKEY hEncKey,
                                   UINT32*      pulUnboundDataLength, BYTE**   prgbUnboundData);

DESCRIPTION

       Tspi_Data_Unbind  decrypts  the  encrypted  data blob exportedfrom the data object used in
       Tspi_Data_Bind. The encrypted data blob must  be  imported  to  the  object  addressed  by
       Tspi_SetAttribData before calling this method.

PARAMETERS

   hEncData
       The handle of the data object which contains the encrypted data.

   hEncKey
       Handle to the key object addressing the private key which is used to decrypt the data.

   pulDataLength
       Receives the length of the data at the parameter prgbUnboundData.

   prgbUnboundData
       Receives a pointer to a buffer containing the plaintext data.

RETURN CODES

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

       TSS_E_INVALID_HANDLE
              hEncData or hEncKey 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_INVALID_ENCSCHEME
              Invalid encryption scheme.

       TSS_E_ENC_INVALID_LENGTH
              Invalid length of data to be encypted.

       TSS_E_ENC_NO_DATA
              No data to encrypt.

       TSS_E_ENC_INVALID_TYPE
              Invalid encryption type.

CONFORMING TO

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

SEE ALSO

       Tspi_Data_Bind(3), Tspi_Data_Unseal(3), Tspi_Data_Seal(3).