1//
2// Copyright (C) 2015 The Android Open Source Project
3//
4// Licensed under the Apache License, Version 2.0 (the "License");
5// you may not use this file except in compliance with the License.
6// You may obtain a copy of the License at
7//
8//      http://www.apache.org/licenses/LICENSE-2.0
9//
10// Unless required by applicable law or agreed to in writing, software
11// distributed under the License is distributed on an "AS IS" BASIS,
12// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13// See the License for the specific language governing permissions and
14// limitations under the License.
15//
16
17#include "trunks/blob_parser.h"
18
19#include <base/logging.h>
20#include <base/stl_util.h>
21
22#include "trunks/error_codes.h"
23
24namespace trunks {
25
26bool BlobParser::SerializeKeyBlob(const TPM2B_PUBLIC& public_info,
27                                  const TPM2B_PRIVATE& private_info,
28                                  std::string* key_blob) {
29  CHECK(key_blob) << "KeyBlob not defined.";
30  key_blob->clear();
31  if ((public_info.size == 0) && (private_info.size == 0)) {
32    return true;
33  }
34  TPM_RC result = Serialize_TPM2B_PUBLIC(public_info, key_blob);
35  if (result != TPM_RC_SUCCESS) {
36    LOG(ERROR) << "Error serializing public info: " << GetErrorString(result);
37    return false;
38  }
39  result = Serialize_TPM2B_PRIVATE(private_info, key_blob);
40  if (result != TPM_RC_SUCCESS) {
41    LOG(ERROR) << "Error serializing private info: " << GetErrorString(result);
42    return false;
43  }
44  return true;
45}
46
47bool BlobParser::ParseKeyBlob(const std::string& key_blob,
48                              TPM2B_PUBLIC* public_info,
49                              TPM2B_PRIVATE* private_info) {
50  CHECK(public_info) << "Public info not defined.";
51  CHECK(private_info) << "Private info not defined.";
52  if (key_blob.empty()) {
53    public_info->size = 0;
54    private_info->size = 0;
55    return true;
56  }
57  std::string mutable_key_blob = key_blob;
58  TPM_RC result = Parse_TPM2B_PUBLIC(&mutable_key_blob, public_info, nullptr);
59  if (result != TPM_RC_SUCCESS) {
60    LOG(ERROR) << "Error parsing public info: " << GetErrorString(result);
61    return false;
62  }
63  result = Parse_TPM2B_PRIVATE(&mutable_key_blob, private_info, nullptr);
64  if (result != TPM_RC_SUCCESS) {
65    LOG(ERROR) << "Error parsing private info: " << GetErrorString(result);
66    return false;
67  }
68  return true;
69}
70
71bool BlobParser::SerializeCreationBlob(const TPM2B_CREATION_DATA& creation_data,
72                                       const TPM2B_DIGEST& creation_hash,
73                                       const TPMT_TK_CREATION& creation_ticket,
74                                       std::string* creation_blob) {
75  CHECK(creation_blob) << "CreationBlob not defined.";
76  creation_blob->clear();
77  TPM_RC result = Serialize_TPM2B_CREATION_DATA(creation_data, creation_blob);
78  if (result != TPM_RC_SUCCESS) {
79    LOG(ERROR) << "Error serializing creation_data: " << GetErrorString(result);
80    return false;
81  }
82  result = Serialize_TPM2B_DIGEST(creation_hash, creation_blob);
83  if (result != TPM_RC_SUCCESS) {
84    LOG(ERROR) << "Error serializing creation_hash: " << GetErrorString(result);
85    return false;
86  }
87  result = Serialize_TPMT_TK_CREATION(creation_ticket, creation_blob);
88  if (result != TPM_RC_SUCCESS) {
89    LOG(ERROR) << "Error serializing creation_ticket: "
90               << GetErrorString(result);
91    return false;
92  }
93  return true;
94}
95
96bool BlobParser::ParseCreationBlob(const std::string& creation_blob,
97                                   TPM2B_CREATION_DATA* creation_data,
98                                   TPM2B_DIGEST* creation_hash,
99                                   TPMT_TK_CREATION* creation_ticket) {
100  CHECK(creation_data) << "CreationData not defined.";
101  CHECK(creation_hash) << "CreationHash not defined.";
102  CHECK(creation_ticket) << "CreationTicket not defined.";
103  if (creation_blob.empty()) {
104    return false;
105  }
106  std::string mutable_creation_blob = creation_blob;
107  TPM_RC result =
108      Parse_TPM2B_CREATION_DATA(&mutable_creation_blob, creation_data, nullptr);
109  if (result != TPM_RC_SUCCESS) {
110    LOG(ERROR) << "Error parsing creation_data: " << GetErrorString(result);
111    return false;
112  }
113  result = Parse_TPM2B_DIGEST(&mutable_creation_blob, creation_hash, nullptr);
114  if (result != TPM_RC_SUCCESS) {
115    LOG(ERROR) << "Error parsing creation_hash: " << GetErrorString(result);
116    return false;
117  }
118  result =
119      Parse_TPMT_TK_CREATION(&mutable_creation_blob, creation_ticket, nullptr);
120  if (result != TPM_RC_SUCCESS) {
121    LOG(ERROR) << "Error parsing creation_ticket: " << GetErrorString(result);
122    return false;
123  }
124  return true;
125}
126
127}  // namespace trunks
128