Change mojo demo apps to use Application.
[chromium-blink-merge.git] / crypto / ec_signature_creator.h
blob16e64f5753cb85a4506a8e117dc7281d678d004e
1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
5 #ifndef CRYPTO_EC_SIGNATURE_CREATOR_H_
6 #define CRYPTO_EC_SIGNATURE_CREATOR_H_
8 #include <string>
9 #include <vector>
11 #include "base/basictypes.h"
12 #include "crypto/crypto_export.h"
14 namespace crypto {
16 class ECPrivateKey;
17 class ECSignatureCreator;
19 class CRYPTO_EXPORT ECSignatureCreatorFactory {
20 public:
21 virtual ~ECSignatureCreatorFactory() {}
23 virtual ECSignatureCreator* Create(ECPrivateKey* key) = 0;
26 // Signs data using a bare private key (as opposed to a full certificate).
27 // We need this class because SignatureCreator is hardcoded to use
28 // RSAPrivateKey.
29 class CRYPTO_EXPORT ECSignatureCreator {
30 public:
31 virtual ~ECSignatureCreator() {}
33 // Create an instance. The caller must ensure that the provided PrivateKey
34 // instance outlives the created ECSignatureCreator.
35 // TODO(rch): This is currently hard coded to use SHA256. Ideally, we should
36 // pass in the hash algorithm identifier.
37 static ECSignatureCreator* Create(ECPrivateKey* key);
39 // Set a factory to make the Create function return non-standard
40 // ECSignatureCreator objects. Because the ECDSA algorithm involves
41 // randomness, this is useful for higher-level tests that want to have
42 // deterministic mocked output to compare.
43 static void SetFactoryForTesting(ECSignatureCreatorFactory* factory);
45 // Signs |data_len| bytes from |data| and writes the results into
46 // |signature| as a DER encoded ECDSA-Sig-Value from RFC 3279.
48 // ECDSA-Sig-Value ::= SEQUENCE {
49 // r INTEGER,
50 // s INTEGER }
51 virtual bool Sign(const uint8* data,
52 int data_len,
53 std::vector<uint8>* signature) = 0;
55 // DecodeSignature converts from a DER encoded ECDSA-Sig-Value (as produced
56 // by Sign) to a `raw' ECDSA signature which consists of a pair of
57 // big-endian, zero-padded, 256-bit integers, r and s. On success it returns
58 // true and puts the raw signature into |out_raw_sig|.
59 // (Only P-256 signatures are supported.)
60 virtual bool DecodeSignature(const std::vector<uint8>& signature,
61 std::vector<uint8>* out_raw_sig) = 0;
64 } // namespace crypto
66 #endif // CRYPTO_EC_SIGNATURE_CREATOR_H_