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| author | Remko Tronçon <git@el-tramo.be> | 2011-08-12 17:29:21 (GMT) |
|---|---|---|
| committer | Remko Tronçon <git@el-tramo.be> | 2011-08-12 17:32:17 (GMT) |
| commit | c6ffcd27e94d2f90fd4a3bcb5d2d3c6550ead59c (patch) | |
| tree | 5968399a0d1ae73c1f197630bef3a0960e8525b5 /Swiften/StringCodecs/HMAC.h | |
| parent | 08cfaa06859238449d6848df4e170ffb6dc605d3 (diff) | |
| download | swift-c6ffcd27e94d2f90fd4a3bcb5d2d3c6550ead59c.zip swift-c6ffcd27e94d2f90fd4a3bcb5d2d3c6550ead59c.tar.bz2 | |
Refactored stringcodec functions to make them independent of hash algos.
Diffstat (limited to 'Swiften/StringCodecs/HMAC.h')
| -rw-r--r-- | Swiften/StringCodecs/HMAC.h | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/Swiften/StringCodecs/HMAC.h b/Swiften/StringCodecs/HMAC.h new file mode 100644 index 0000000..438a3a7 --- /dev/null +++ b/Swiften/StringCodecs/HMAC.h @@ -0,0 +1,57 @@ +/* + * Copyright (c) 2010 Remko Tronçon + * Licensed under the GNU General Public License v3. + * See Documentation/Licenses/GPLv3.txt for more information. + */ + +#pragma once + +#include <Swiften/Base/ByteArray.h> +#include <Swiften/Base/Algorithm.h> +#include <cassert> + +namespace Swift { + namespace HMAC_Detail { + static const unsigned int B = 64; + + template<typename Hash, typename KeyType> + static ByteArray getHMAC(const KeyType& key, const ByteArray& data) { + assert(key.size() <= B); + Hash hash; + + // Create the padded key + KeyType paddedKey(key); + paddedKey.resize(B, 0x0); + + // Create the first value + KeyType x(paddedKey); + for (unsigned int i = 0; i < x.size(); ++i) { + x[i] ^= 0x36; + } + append(x, data); + + // Create the second value + KeyType y(paddedKey); + for (unsigned int i = 0; i < y.size(); ++i) { + y[i] ^= 0x5c; + } + append(y, hash(x)); + + return hash(y); + } + }; + + template<typename Hash> + class HMAC { + private: + + public: + ByteArray operator()(const ByteArray& key, const ByteArray& data) const { + return HMAC_Detail::getHMAC<Hash,ByteArray>(key, data); + } + + ByteArray operator()(const SafeByteArray& key, const ByteArray& data) const { + return HMAC_Detail::getHMAC<Hash,SafeByteArray>(key, data); + } + }; +} |