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// 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.
#ifndef CRYPTO_EC_SIGNATURE_CREATOR_H_
#define CRYPTO_EC_SIGNATURE_CREATOR_H_
#pragma once
#include <vector>
#include "base/basictypes.h"
#include "crypto/crypto_export.h"
namespace crypto {
class ECPrivateKey;
// 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 {
public:
~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 SHA1. Ideally, we should
// pass in the hash algorithm identifier.
static ECSignatureCreator* Create(ECPrivateKey* key);
// 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 {
// r INTEGER,
// s INTEGER }
bool Sign(const uint8* data,
int data_len,
std::vector<uint8>* signature);
private:
// Private constructor. Use the Create() method instead.
explicit ECSignatureCreator(ECPrivateKey* key);
ECPrivateKey* key_;
DISALLOW_COPY_AND_ASSIGN(ECSignatureCreator);
};
} // namespace crypto
#endif // CRYPTO_EC_SIGNATURE_CREATOR_H_
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