1/*
2 * Copyright 2014 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#ifndef SYSTEM_KEYMASTER_GOOGLE_SOFT_KEYMASTER_H_
18#define SYSTEM_KEYMASTER_GOOGLE_SOFT_KEYMASTER_H_
19
20#include <keymaster/google_keymaster.h>
21
22namespace keymaster {
23
24class GoogleSoftKeymaster : public GoogleKeymaster {
25  public:
26    GoogleSoftKeymaster(size_t operation_table_size, Logger* logger)
27        : GoogleKeymaster(operation_table_size, logger) {
28        root_of_trust.tag = KM_TAG_ROOT_OF_TRUST;
29        root_of_trust.blob.data = reinterpret_cast<const uint8_t*>("SW");
30        root_of_trust.blob.data_length = 2;
31    }
32    bool is_enforced(keymaster_tag_t /* tag */) { return false; }
33    keymaster_key_origin_t origin() { return KM_ORIGIN_SOFTWARE; }
34
35  private:
36    static uint8_t master_key_[];
37
38    keymaster_key_blob_t MasterKey() {
39        keymaster_key_blob_t blob;
40        blob.key_material = master_key_;
41        blob.key_material_size = 16;
42        return blob;
43    }
44
45    void GenerateNonce(uint8_t* nonce, size_t length) {
46        for (size_t i = 0; i < length; ++i)
47            nonce[i] = 0;
48    }
49
50    keymaster_key_param_t RootOfTrustTag() { return root_of_trust; }
51
52    keymaster_key_param_t root_of_trust;
53};
54
55uint8_t GoogleSoftKeymaster::master_key_[16] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
56
57}  // namespace
58
59#endif  // SYSTEM_KEYMASTER_GOOGLE_SOFT_KEYMASTER_H_
60