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      1 // Copyright 2015 The Chromium OS Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 // THIS CODE IS GENERATED - DO NOT MODIFY!
      6 
      7 #include "MemoryLib_fp.h"
      8 #include "HMAC_fp.h"
      9 
     10 UINT16 HMAC_Out_Marshal(HMAC_Out* source,
     11                         TPMI_ST_COMMAND_TAG tag,
     12                         BYTE** buffer,
     13                         INT32* size) {
     14   UINT16 total_size = 0;
     15   UINT32 parameter_size = 0;
     16   BYTE* parameter_size_location;
     17   INT32 parameter_size_size = sizeof(UINT32);
     18   UINT32 num_response_handles = 0;
     19   // Add parameter_size=0 to indicate size of the parameter area. Will be
     20   // replaced later by computed parameter_size.
     21   if (tag == TPM_ST_SESSIONS) {
     22     parameter_size_location = *buffer;
     23     // Don't add to total_size, but increment *buffer and decrement *size.
     24     UINT32_Marshal(&parameter_size, buffer, size);
     25   }
     26   // Marshal response parameters.
     27   total_size += TPM2B_DIGEST_Marshal(&source->outHMAC, buffer, size);
     28   // Compute actual parameter_size. Don't add result to total_size.
     29   if (tag == TPM_ST_SESSIONS) {
     30     parameter_size = total_size - num_response_handles * sizeof(TPM_HANDLE);
     31     UINT32_Marshal(&parameter_size, &parameter_size_location,
     32                    &parameter_size_size);
     33   }
     34   return total_size;
     35 }
     36 
     37 TPM_RC HMAC_In_Unmarshal(HMAC_In* target,
     38                          TPM_HANDLE request_handles[],
     39                          BYTE** buffer,
     40                          INT32* size) {
     41   TPM_RC result = TPM_RC_SUCCESS;
     42   // Get request handles from request_handles array.
     43   target->handle = request_handles[0];
     44   // Unmarshal request parameters.
     45   result = TPM2B_MAX_BUFFER_Unmarshal(&target->buffer, buffer, size);
     46   if (result != TPM_RC_SUCCESS) {
     47     return result;
     48   }
     49   result = TPMI_ALG_HASH_Unmarshal(&target->hashAlg, buffer, size, TRUE);
     50   if (result != TPM_RC_SUCCESS) {
     51     return result;
     52   }
     53   if ((result == TPM_RC_SUCCESS) && *size) {
     54     result = TPM_RC_SIZE;
     55   }
     56   return result;
     57 }
     58 
     59 TPM_RC Exec_HMAC(TPMI_ST_COMMAND_TAG tag,
     60                  BYTE** request_parameter_buffer,
     61                  INT32* request_parameter_buffer_size,
     62                  TPM_HANDLE request_handles[],
     63                  UINT32* response_handle_buffer_size,
     64                  UINT32* response_parameter_buffer_size) {
     65   TPM_RC result = TPM_RC_SUCCESS;
     66   HMAC_In in;
     67   HMAC_Out out;
     68 #ifdef TPM_CC_HMAC
     69   BYTE* response_buffer;
     70   INT32 response_buffer_size;
     71   UINT16 bytes_marshalled;
     72   UINT16 num_response_handles = 0;
     73 #endif
     74   *response_handle_buffer_size = 0;
     75   *response_parameter_buffer_size = 0;
     76   // Unmarshal request parameters to input structure.
     77   result = HMAC_In_Unmarshal(&in, request_handles, request_parameter_buffer,
     78                              request_parameter_buffer_size);
     79   if (result != TPM_RC_SUCCESS) {
     80     return result;
     81   }
     82   // Execute command.
     83   result = TPM2_HMAC(&in, &out);
     84   if (result != TPM_RC_SUCCESS) {
     85     return result;
     86   }
     87 // Marshal output structure to global response buffer.
     88 #ifdef TPM_CC_HMAC
     89   response_buffer = MemoryGetResponseBuffer(TPM_CC_HMAC) + 10;
     90   response_buffer_size = MAX_RESPONSE_SIZE - 10;
     91   bytes_marshalled =
     92       HMAC_Out_Marshal(&out, tag, &response_buffer, &response_buffer_size);
     93   *response_handle_buffer_size = num_response_handles * sizeof(TPM_HANDLE);
     94   *response_parameter_buffer_size =
     95       bytes_marshalled - *response_handle_buffer_size;
     96   return TPM_RC_SUCCESS;
     97 #endif
     98   return TPM_RC_COMMAND_CODE;
     99 }
    100