1 /*
2 * Copyright 2018 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 <keymaster/km_openssl/triple_des_key.h>
18
19 #include <assert.h>
20
21 #include <keymaster/new.h>
22
23 #include <openssl/err.h>
24 #include <openssl/rand.h>
25
26 #include "triple_des_operation.h"
27
28 namespace keymaster {
29
30 static TripleDesOperationFactory encrypt_factory(KM_PURPOSE_ENCRYPT);
31 static TripleDesOperationFactory decrypt_factory(KM_PURPOSE_DECRYPT);
32
GetOperationFactory(keymaster_purpose_t purpose) const33 OperationFactory* TripleDesKeyFactory::GetOperationFactory(keymaster_purpose_t purpose) const {
34 switch (purpose) {
35 case KM_PURPOSE_ENCRYPT:
36 return &encrypt_factory;
37 case KM_PURPOSE_DECRYPT:
38 return &decrypt_factory;
39 default:
40 return nullptr;
41 }
42 }
43
LoadKey(KeymasterKeyBlob && key_material,const AuthorizationSet &,AuthorizationSet && hw_enforced,AuthorizationSet && sw_enforced,UniquePtr<Key> * key) const44 keymaster_error_t TripleDesKeyFactory::LoadKey(KeymasterKeyBlob&& key_material,
45 const AuthorizationSet& /* additional_params */,
46 AuthorizationSet&& hw_enforced,
47 AuthorizationSet&& sw_enforced,
48 UniquePtr<Key>* key) const {
49 if (!key) return KM_ERROR_OUTPUT_PARAMETER_NULL;
50
51 keymaster_error_t error = KM_ERROR_OK;
52 key->reset(new (std::nothrow)
53 TripleDesKey(move(key_material), move(hw_enforced), move(sw_enforced), this));
54 if (!key->get()) error = KM_ERROR_MEMORY_ALLOCATION_FAILED;
55 return error;
56 }
57
validate_algorithm_specific_new_key_params(const AuthorizationSet & key_description) const58 keymaster_error_t TripleDesKeyFactory::validate_algorithm_specific_new_key_params(
59 const AuthorizationSet& key_description) const {
60 if (key_description.Contains(TAG_MIN_MAC_LENGTH)) return KM_ERROR_INVALID_TAG;
61 return KM_ERROR_OK;
62 }
63
64 } // namespace keymaster
65