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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 "ECDH_KeyGen_fp.h"
      9 
     10 UINT16 ECDH_KeyGen_Out_Marshal(ECDH_KeyGen_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_ECC_POINT_Marshal(&source->zPoint, buffer, size);
     28   total_size += TPM2B_ECC_POINT_Marshal(&source->pubPoint, buffer, size);
     29   // Compute actual parameter_size. Don't add result to total_size.
     30   if (tag == TPM_ST_SESSIONS) {
     31     parameter_size = total_size - num_response_handles * sizeof(TPM_HANDLE);
     32     UINT32_Marshal(&parameter_size, &parameter_size_location,
     33                    &parameter_size_size);
     34   }
     35   return total_size;
     36 }
     37 
     38 TPM_RC ECDH_KeyGen_In_Unmarshal(ECDH_KeyGen_In* target,
     39                                 TPM_HANDLE request_handles[],
     40                                 BYTE** buffer,
     41                                 INT32* size) {
     42   TPM_RC result = TPM_RC_SUCCESS;
     43   // Get request handles from request_handles array.
     44   target->keyHandle = request_handles[0];
     45   if ((result == TPM_RC_SUCCESS) && *size) {
     46     result = TPM_RC_SIZE;
     47   }
     48   return result;
     49 }
     50 
     51 TPM_RC Exec_ECDH_KeyGen(TPMI_ST_COMMAND_TAG tag,
     52                         BYTE** request_parameter_buffer,
     53                         INT32* request_parameter_buffer_size,
     54                         TPM_HANDLE request_handles[],
     55                         UINT32* response_handle_buffer_size,
     56                         UINT32* response_parameter_buffer_size) {
     57   TPM_RC result = TPM_RC_SUCCESS;
     58   ECDH_KeyGen_In in;
     59   ECDH_KeyGen_Out out;
     60 #ifdef TPM_CC_ECDH_KeyGen
     61   BYTE* response_buffer;
     62   INT32 response_buffer_size;
     63   UINT16 bytes_marshalled;
     64   UINT16 num_response_handles = 0;
     65 #endif
     66   *response_handle_buffer_size = 0;
     67   *response_parameter_buffer_size = 0;
     68   // Unmarshal request parameters to input structure.
     69   result =
     70       ECDH_KeyGen_In_Unmarshal(&in, request_handles, request_parameter_buffer,
     71                                request_parameter_buffer_size);
     72   if (result != TPM_RC_SUCCESS) {
     73     return result;
     74   }
     75   // Execute command.
     76   result = TPM2_ECDH_KeyGen(&in, &out);
     77   if (result != TPM_RC_SUCCESS) {
     78     return result;
     79   }
     80 // Marshal output structure to global response buffer.
     81 #ifdef TPM_CC_ECDH_KeyGen
     82   response_buffer = MemoryGetResponseBuffer(TPM_CC_ECDH_KeyGen) + 10;
     83   response_buffer_size = MAX_RESPONSE_SIZE - 10;
     84   bytes_marshalled = ECDH_KeyGen_Out_Marshal(&out, tag, &response_buffer,
     85                                              &response_buffer_size);
     86   *response_handle_buffer_size = num_response_handles * sizeof(TPM_HANDLE);
     87   *response_parameter_buffer_size =
     88       bytes_marshalled - *response_handle_buffer_size;
     89   return TPM_RC_SUCCESS;
     90 #endif
     91   return TPM_RC_COMMAND_CODE;
     92 }
     93