blob: 16e64f5753cb85a4506a8e117dc7281d678d004e [file] [log] [blame]
// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include <string>
#include <vector>
#include "base/basictypes.h"
#include "crypto/crypto_export.h"
namespace crypto {
class ECPrivateKey;
class ECSignatureCreator;
class CRYPTO_EXPORT ECSignatureCreatorFactory {
virtual ~ECSignatureCreatorFactory() {}
virtual ECSignatureCreator* Create(ECPrivateKey* key) = 0;
// Signs data using a bare private key (as opposed to a full certificate).
// We need this class because SignatureCreator is hardcoded to use
// RSAPrivateKey.
class CRYPTO_EXPORT ECSignatureCreator {
virtual ~ECSignatureCreator() {}
// Create an instance. The caller must ensure that the provided PrivateKey
// instance outlives the created ECSignatureCreator.
// TODO(rch): This is currently hard coded to use SHA256. Ideally, we should
// pass in the hash algorithm identifier.
static ECSignatureCreator* Create(ECPrivateKey* key);
// Set a factory to make the Create function return non-standard
// ECSignatureCreator objects. Because the ECDSA algorithm involves
// randomness, this is useful for higher-level tests that want to have
// deterministic mocked output to compare.
static void SetFactoryForTesting(ECSignatureCreatorFactory* factory);
// Signs |data_len| bytes from |data| and writes the results into
// |signature| as a DER encoded ECDSA-Sig-Value from RFC 3279.
// ECDSA-Sig-Value ::= SEQUENCE {
// s INTEGER }
virtual bool Sign(const uint8* data,
int data_len,
std::vector<uint8>* signature) = 0;
// DecodeSignature converts from a DER encoded ECDSA-Sig-Value (as produced
// by Sign) to a `raw' ECDSA signature which consists of a pair of
// big-endian, zero-padded, 256-bit integers, r and s. On success it returns
// true and puts the raw signature into |out_raw_sig|.
// (Only P-256 signatures are supported.)
virtual bool DecodeSignature(const std::vector<uint8>& signature,
std::vector<uint8>* out_raw_sig) = 0;
} // namespace crypto