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_ECDSA_OPERATION_H_
18 #define SYSTEM_KEYMASTER_ECDSA_OPERATION_H_
19 
20 #include <openssl/ec.h>
21 
22 #include <UniquePtr.h>
23 
24 #include <keymaster/key_blob.h>
25 
26 #include "operation.h"
27 
28 namespace keymaster {
29 
30 class EcdsaOperation : public Operation {
31   public:
EcdsaOperation(keymaster_purpose_t purpose,const Logger & logger,keymaster_digest_t digest,keymaster_padding_t padding,EC_KEY * key)32     EcdsaOperation(keymaster_purpose_t purpose, const Logger& logger, keymaster_digest_t digest,
33                    keymaster_padding_t padding, EC_KEY* key)
34         : Operation(purpose, logger), ecdsa_key_(key), digest_(digest), padding_(padding) {}
35     ~EcdsaOperation();
36 
Begin()37     virtual keymaster_error_t Begin() { return KM_ERROR_OK; }
38     virtual keymaster_error_t Update(const Buffer& input, Buffer* output);
Abort()39     virtual keymaster_error_t Abort() { return KM_ERROR_OK; }
40 
41   protected:
42     keymaster_error_t StoreData(const Buffer& input);
43 
44     EC_KEY* ecdsa_key_;
45     keymaster_digest_t digest_;
46     keymaster_padding_t padding_;
47     Buffer data_;
48 };
49 
50 class EcdsaSignOperation : public EcdsaOperation {
51   public:
EcdsaSignOperation(keymaster_purpose_t purpose,const Logger & logger,keymaster_digest_t digest,keymaster_padding_t padding,EC_KEY * key)52     EcdsaSignOperation(keymaster_purpose_t purpose, const Logger& logger, keymaster_digest_t digest,
53                        keymaster_padding_t padding, EC_KEY* key)
54         : EcdsaOperation(purpose, logger, digest, padding, key) {}
55     virtual keymaster_error_t Finish(const Buffer& signature, Buffer* output);
56 };
57 
58 class EcdsaVerifyOperation : public EcdsaOperation {
59   public:
EcdsaVerifyOperation(keymaster_purpose_t purpose,const Logger & logger,keymaster_digest_t digest,keymaster_padding_t padding,EC_KEY * key)60     EcdsaVerifyOperation(keymaster_purpose_t purpose, const Logger& logger,
61                          keymaster_digest_t digest, keymaster_padding_t padding, EC_KEY* key)
62         : EcdsaOperation(purpose, logger, digest, padding, key) {}
63     virtual keymaster_error_t Finish(const Buffer& signature, Buffer* output);
64 };
65 
66 }  // namespace keymaster
67 
68 #endif  // SYSTEM_KEYMASTER_ECDSA_OPERATION_H_
69