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 "GetRandom_fp.h"
9
10UINT16 GetRandom_Out_Marshal(GetRandom_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->randomBytes, 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
37TPM_RC GetRandom_In_Unmarshal(GetRandom_In* target,
38                              TPM_HANDLE request_handles[],
39                              BYTE** buffer,
40                              INT32* size) {
41  TPM_RC result = TPM_RC_SUCCESS;
42  // Unmarshal request parameters.
43  result = UINT16_Unmarshal(&target->bytesRequested, buffer, size);
44  if (result != TPM_RC_SUCCESS) {
45    return result;
46  }
47  if ((result == TPM_RC_SUCCESS) && *size) {
48    result = TPM_RC_SIZE;
49  }
50  return result;
51}
52
53TPM_RC Exec_GetRandom(TPMI_ST_COMMAND_TAG tag,
54                      BYTE** request_parameter_buffer,
55                      INT32* request_parameter_buffer_size,
56                      TPM_HANDLE request_handles[],
57                      UINT32* response_handle_buffer_size,
58                      UINT32* response_parameter_buffer_size) {
59  TPM_RC result = TPM_RC_SUCCESS;
60  GetRandom_In in;
61  GetRandom_Out out;
62#ifdef TPM_CC_GetRandom
63  BYTE* response_buffer;
64  INT32 response_buffer_size;
65  UINT16 bytes_marshalled;
66  UINT16 num_response_handles = 0;
67#endif
68  *response_handle_buffer_size = 0;
69  *response_parameter_buffer_size = 0;
70  // Unmarshal request parameters to input structure.
71  result =
72      GetRandom_In_Unmarshal(&in, request_handles, request_parameter_buffer,
73                             request_parameter_buffer_size);
74  if (result != TPM_RC_SUCCESS) {
75    return result;
76  }
77  // Execute command.
78  result = TPM2_GetRandom(&in, &out);
79  if (result != TPM_RC_SUCCESS) {
80    return result;
81  }
82// Marshal output structure to global response buffer.
83#ifdef TPM_CC_GetRandom
84  response_buffer = MemoryGetResponseBuffer(TPM_CC_GetRandom) + 10;
85  response_buffer_size = MAX_RESPONSE_SIZE - 10;
86  bytes_marshalled =
87      GetRandom_Out_Marshal(&out, tag, &response_buffer, &response_buffer_size);
88  *response_handle_buffer_size = num_response_handles * sizeof(TPM_HANDLE);
89  *response_parameter_buffer_size =
90      bytes_marshalled - *response_handle_buffer_size;
91  return TPM_RC_SUCCESS;
92#endif
93  return TPM_RC_COMMAND_CODE;
94}
95