1/*
2 * Copyright 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#ifndef SYSTEM_KEYMASTER_EC_KEYMASTER1_KEY_H_
18#define SYSTEM_KEYMASTER_EC_KEYMASTER1_KEY_H_
19
20#include <openssl/ecdsa.h>
21
22#include <hardware/keymaster1.h>
23#include <keymaster/android_keymaster_utils.h>
24#include <keymaster/logger.h>
25#include <keymaster/ec_key_factory.h>
26#include <keymaster/soft_keymaster_context.h>
27
28#include "ec_key.h"
29#include "keymaster1_engine.h"
30
31namespace keymaster {
32
33class SoftKeymasterContext;
34
35/**
36 * EcdsaKeymaster1KeyFactory is a KeyFactory that creates and loads keys which are actually backed
37 * by a hardware keymaster1 module, but which does not support all keymaster1 digests.  During
38 * generation or import any unsupported digests in the key description are silently replaced with
39 * KM_DIGEST_NONE.
40 */
41class EcdsaKeymaster1KeyFactory : public EcKeyFactory {
42  public:
43    EcdsaKeymaster1KeyFactory(const SoftKeymasterContext* context, const Keymaster1Engine* engine);
44
45    keymaster_error_t GenerateKey(const AuthorizationSet& key_description,
46                                  KeymasterKeyBlob* key_blob, AuthorizationSet* hw_enforced,
47                                  AuthorizationSet* sw_enforced) const override;
48
49    keymaster_error_t ImportKey(const AuthorizationSet& key_description,
50                                keymaster_key_format_t input_key_material_format,
51                                const KeymasterKeyBlob& input_key_material,
52                                KeymasterKeyBlob* output_key_blob, AuthorizationSet* hw_enforced,
53                                AuthorizationSet* sw_enforced) const override;
54
55    keymaster_error_t LoadKey(const KeymasterKeyBlob& key_material,
56                              const AuthorizationSet& additional_params,
57                              const AuthorizationSet& hw_enforced,
58                              const AuthorizationSet& sw_enforced,
59                              UniquePtr<Key>* key) const override;
60
61    OperationFactory* GetOperationFactory(keymaster_purpose_t purpose) const override;
62
63  private:
64    const Keymaster1Engine* engine_;
65
66    std::unique_ptr<OperationFactory> sign_factory_;
67    std::unique_ptr<OperationFactory> verify_factory_;
68};
69
70class EcdsaKeymaster1Key : public EcKey {
71  public:
72    EcdsaKeymaster1Key(EC_KEY* ecdsa_key, const AuthorizationSet& hw_enforced,
73                       const AuthorizationSet& sw_enforced, keymaster_error_t* error)
74        : EcKey(ecdsa_key, hw_enforced, sw_enforced, error) {}
75};
76
77}  // namespace keymaster
78
79#endif  // SYSTEM_KEYMASTER_ECDSA_KEYMASTER1_KEY_H_
80