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 #include <keymaster/asymmetric_key_factory.h>
18
19 #include <utility>
20
21 #include <keymaster/android_keymaster_utils.h>
22
23 #include <keymaster/km_openssl/asymmetric_key.h>
24 #include <keymaster/km_openssl/openssl_err.h>
25 #include <keymaster/km_openssl/openssl_utils.h>
26
27 namespace keymaster {
28
29 static const keymaster_key_format_t supported_import_formats[] = {KM_KEY_FORMAT_PKCS8};
30 const keymaster_key_format_t*
SupportedImportFormats(size_t * format_count) const31 AsymmetricKeyFactory::SupportedImportFormats(size_t* format_count) const {
32 *format_count = array_length(supported_import_formats);
33 return supported_import_formats;
34 }
35
36 static const keymaster_key_format_t supported_export_formats[] = {KM_KEY_FORMAT_X509};
37 const keymaster_key_format_t*
SupportedExportFormats(size_t * format_count) const38 AsymmetricKeyFactory::SupportedExportFormats(size_t* format_count) const {
39 *format_count = array_length(supported_export_formats);
40 return supported_export_formats;
41 }
42
LoadKey(KeymasterKeyBlob && key_material,const AuthorizationSet &,AuthorizationSet && hw_enforced,AuthorizationSet && sw_enforced,UniquePtr<Key> * key) const43 keymaster_error_t AsymmetricKeyFactory::LoadKey(KeymasterKeyBlob&& key_material,
44 const AuthorizationSet& /* additional_params */,
45 AuthorizationSet&& hw_enforced,
46 AuthorizationSet&& sw_enforced,
47 UniquePtr<Key>* key) const {
48 UniquePtr<AsymmetricKey> asym_key;
49 keymaster_error_t error = CreateEmptyKey(std::move(hw_enforced), std::move(sw_enforced),
50 &asym_key);
51 if (error != KM_ERROR_OK) return error;
52
53 const uint8_t* tmp = key_material.key_material;
54 asym_key->key_material() = std::move(key_material);
55
56 EVP_PKEY* pkey = d2i_PrivateKey(asym_key->evp_key_type(), nullptr /* pkey */, &tmp,
57 asym_key->key_material().key_material_size);
58 if (!pkey) return TranslateLastOpenSslError();
59 UniquePtr<EVP_PKEY, EVP_PKEY_Delete> pkey_deleter(pkey);
60
61 if (!asym_key->EvpToInternal(pkey)) {
62 error = TranslateLastOpenSslError();
63 } else {
64 *key = std::move(asym_key);
65 }
66
67 return error;
68 }
69
70 } // namespace keymaster
71