1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/ipc/chromium/src/base/hmac.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,56 @@
1.4 +// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
1.5 +// Use of this source code is governed by a BSD-style license that can be
1.6 +// found in the LICENSE file.
1.7 +
1.8 +// Utility class for calculating the HMAC for a given message. We currently
1.9 +// only support SHA1 for the hash algorithm, but this can be extended easily.
1.10 +
1.11 +#ifndef BASE_HMAC_H_
1.12 +#define BASE_HMAC_H_
1.13 +
1.14 +#include <string>
1.15 +
1.16 +#include "base/basictypes.h"
1.17 +#include "base/scoped_ptr.h"
1.18 +
1.19 +namespace base {
1.20 +
1.21 +// Simplify the interface and reduce includes by abstracting out the internals.
1.22 +struct HMACPlatformData;
1.23 +
1.24 +class HMAC {
1.25 + public:
1.26 + // The set of supported hash functions. Extend as required.
1.27 + enum HashAlgorithm {
1.28 + SHA1
1.29 + };
1.30 +
1.31 + explicit HMAC(HashAlgorithm hash_alg);
1.32 + ~HMAC();
1.33 +
1.34 + // Initializes this instance using |key| of the length |key_length|. Call Init
1.35 + // only once. It returns false on the second or later calls.
1.36 + bool Init(const unsigned char* key, int key_length);
1.37 +
1.38 + // Initializes this instance using |key|. Call Init only once. It returns
1.39 + // false on the second or later calls.
1.40 + bool Init(const std::string& key) {
1.41 + return Init(reinterpret_cast<const unsigned char*>(key.data()),
1.42 + static_cast<int>(key.size()));
1.43 + }
1.44 +
1.45 + // Calculates the HMAC for the message in |data| using the algorithm supplied
1.46 + // to the constructor and the key supplied to the Init method. The HMAC is
1.47 + // returned in |digest|, which has |digest_length| bytes of storage available.
1.48 + bool Sign(const std::string& data, unsigned char* digest, int digest_length);
1.49 +
1.50 + private:
1.51 + HashAlgorithm hash_alg_;
1.52 + scoped_ptr<HMACPlatformData> plat_;
1.53 +
1.54 + DISALLOW_COPY_AND_ASSIGN(HMAC);
1.55 +};
1.56 +
1.57 +} // namespace base
1.58 +
1.59 +#endif // BASE_HMAC_H_
