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87
DependentExtensions/cat/crypt/hash/HMAC_MD5.hpp
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87
DependentExtensions/cat/crypt/hash/HMAC_MD5.hpp
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/*
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Copyright (c) 2009-2010 Christopher A. Taylor. All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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* Redistributions of source code must retain the above copyright notice,
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this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright notice,
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this list of conditions and the following disclaimer in the documentation
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and/or other materials provided with the distribution.
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* Neither the name of LibCat nor the names of its contributors may be used
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to endorse or promote products derived from this software without
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specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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HMAC-MD5 is still secure despite the ease of producing collisions in MD5.
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See Mihir Bellare paper "New Proofs for NMAC and HMAC: Security without Collision-Resistance" (June 2006)
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Using HMAC construction:
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HMAC(x) = h(k || p1 || h(k || p2 || x))
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h() = MD5 hash
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p1,p2 = distinct padding to bring k up to the block size
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p1 = 0x36 repeated, p2 = 0x5c repeated
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Diverges from usual implementation by using little-endian rather than big-endian input
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*/
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#ifndef HMAC_MD5_HPP
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#define HMAC_MD5_HPP
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#include <cat/crypt/hash/ICryptHash.hpp>
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namespace cat {
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class CAT_EXPORT HMAC_MD5 : public ICryptHash
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{
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protected:
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static const int DIGEST_BYTES = 16;
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static const int WORK_BYTES = 64; // bytes in one block
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static const int WORK_WORDS = WORK_BYTES / sizeof(u32);
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u32 CachedInitialState[4]; // Cached state for H(K||inner padding)
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u32 CachedFinalState[4]; // Cached state for H(K||outer padding)
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u64 byte_counter;
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u32 State[4];
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u8 Work[WORK_BYTES];
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int used_bytes;
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void HashComputation(const void *message, int blocks, u32 *NextState);
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// Unsupported modes
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bool BeginKey(int /*bits*/) { return false; }
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bool BeginKDF() { return false; }
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bool BeginPRNG() { return false; }
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public:
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~HMAC_MD5();
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bool SetKey(ICryptHash *parent);
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void RekeyFromMD5(HMAC_MD5 *parent);
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bool BeginMAC();
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void Crunch(const void *message, int bytes);
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void End();
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// TODO: Strengthening is not supported right now
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void Generate(void *out, int bytes, int strengthening_rounds = 0);
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};
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} // namespace cat
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#endif // HMAC_MD5_HPP
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79
DependentExtensions/cat/crypt/hash/ICryptHash.hpp
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79
DependentExtensions/cat/crypt/hash/ICryptHash.hpp
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/*
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Copyright (c) 2009-2010 Christopher A. Taylor. All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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* Redistributions of source code must retain the above copyright notice,
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this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright notice,
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this list of conditions and the following disclaimer in the documentation
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and/or other materials provided with the distribution.
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* Neither the name of LibCat nor the names of its contributors may be used
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to endorse or promote products derived from this software without
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specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
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CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE.
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*/
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// 06/15/09 began
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#ifndef CAT_I_CRYPT_HASH_HPP
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#define CAT_I_CRYPT_HASH_HPP
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#include <cat/Platform.hpp>
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#include <cstring>
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namespace cat {
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// Cryptographic hash functions of any size will derive from ICryptoHash and implement its public methods
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class CAT_EXPORT ICryptHash
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{
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protected:
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int digest_bytes;
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public:
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virtual ~ICryptHash() {}
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// Returns the number of bytes in a message digest produced by this hash
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CAT_INLINE int GetDigestByteCount() { return digest_bytes; }
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CAT_INLINE void CrunchString(const char *s) { Crunch(s, (int)std::strlen(s) + 1); }
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public:
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// Begin a new key
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virtual bool BeginKey(int bits) = 0;
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// Start from an existing key
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virtual bool SetKey(ICryptHash *parent) = 0;
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// Begin hash function in MAC, KDF, or PRNG mode
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virtual bool BeginMAC() = 0;
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virtual bool BeginKDF() = 0;
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virtual bool BeginPRNG() = 0;
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// Crunch some message bytes
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virtual void Crunch(const void *message, int bytes) = 0;
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// Finalize the hash and prepare to generate output
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virtual void End() = 0;
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// Extended hash output mode
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virtual void Generate(void *out, int bytes, int strengthening_rounds = 0) = 0;
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};
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} // namespace cat
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#endif // CAT_I_CRYPT_HASH_HPP
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108
DependentExtensions/cat/crypt/hash/Skein.hpp
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108
DependentExtensions/cat/crypt/hash/Skein.hpp
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/*
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Copyright (c) 2009-2010 Christopher A. Taylor. All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
|
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|
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* Redistributions of source code must retain the above copyright notice,
|
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this list of conditions and the following disclaimer.
|
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* Redistributions in binary form must reproduce the above copyright notice,
|
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this list of conditions and the following disclaimer in the documentation
|
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and/or other materials provided with the distribution.
|
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* Neither the name of LibCat nor the names of its contributors may be used
|
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to endorse or promote products derived from this software without
|
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specific prior written permission.
|
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|
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
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ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
|
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
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CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
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CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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Bruce Schneier's SHA-3 candidate Skein hash function
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http://www.skein-hash.info/
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*/
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#ifndef CAT_SKEIN_HPP
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#define CAT_SKEIN_HPP
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#include <cat/crypt/hash/ICryptHash.hpp>
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namespace cat {
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// Base class for various versions of Skein
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class CAT_EXPORT Skein : public ICryptHash
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{
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protected:
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// Tweak word 1 bit field starting positions
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static const int T1_POS_TREE_LVL = 112-64; // bits 112..118 : level in hash tree
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static const int T1_POS_BIT_PAD = 119-64; // bit 119 : partial final input byte
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static const int T1_POS_BLK_TYPE = 120-64; // bits 120..125 : type field
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static const int T1_POS_FIRST = 126-64; // bits 126 : first block flag
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static const int T1_POS_FINAL = 127-64; // bit 127 : final block flag
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// Tweak word 1 bit field masks
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static const u64 T1_MASK_FIRST = (u64)1 << T1_POS_FIRST;
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static const u64 T1_MASK_FINAL = (u64)1 << T1_POS_FINAL;
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static const u64 T1_MASK_BIT_PAD = (u64)1 << T1_POS_BIT_PAD;
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static const u64 T1_MASK_TREE_LVL = (u64)0x7F << T1_POS_TREE_LVL;
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static const u64 T1_MASK_BLK_TYPE = (u64)63 << T1_POS_BLK_TYPE;
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static const int BLK_TYPE_KEY = 0; // key, for MAC and KDF
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static const int BLK_TYPE_CFG = 4; // configuration block
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static const int BLK_TYPE_PERS = 8; // personalization string
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static const int BLK_TYPE_PK = 12; // public key (for digital signature hashing)
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static const int BLK_TYPE_KDF = 16; // key identifier for KDF
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static const int BLK_TYPE_NONCE = 20; // nonce for PRNG
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static const int BLK_TYPE_MSG = 48; // message processing
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static const int BLK_TYPE_OUT = 63; // output stage
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static const u32 ID_STRING_LE = 0x33414853;
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static const u32 SKEIN_VERSION = 1;
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static const u64 SCHEMA_VER = ((u64)SKEIN_VERSION << 32) | ID_STRING_LE;
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static const int MAX_BITS = 512;
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static const int MAX_WORDS = MAX_BITS / 64;
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static const int MAX_BYTES = MAX_BITS / 8;
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u64 Tweak[2];
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u64 State[MAX_WORDS];
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u8 Work[MAX_BYTES];
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int used_bytes, digest_words;
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u64 output_block_counter;
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bool output_prng_mode;
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typedef void (Skein::*HashComputation)(const void *message, int blocks, u32 byte_count, u64 *NextState);
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void HashComputation256(const void *message, int blocks, u32 byte_count, u64 *NextState);
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void HashComputation512(const void *message, int blocks, u32 byte_count, u64 *NextState);
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HashComputation hash_func;
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void GenerateInitialState(int bits);
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public:
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~Skein();
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bool BeginKey(int bits);
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bool SetKey(ICryptHash *parent);
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bool BeginMAC();
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bool BeginKDF();
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bool BeginPRNG();
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void Crunch(const void *message, int bytes);
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void End();
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void Generate(void *out, int bytes, int strengthening_rounds = 0);
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};
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} // namespace cat
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#endif // CAT_SKEIN_HPP
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