forked from 0ad/0ad
63 lines
2.2 KiB
C
63 lines
2.2 KiB
C
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/* Copyright (c) 2013 Wildfire Games
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be included
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* in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#ifndef SHA_INCLUDED
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#define SHA_INCLUDED
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#define SHA_DIGEST_SIZE 32
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typedef unsigned char byte;
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typedef unsigned int uint;
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/**
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* Structure for performing SHA256 encryption on arbitrary data
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*/
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struct SHA256
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{
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uint total[2];
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uint state[8];
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byte buffer[64];
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SHA256();
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void init();
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void transform(byte (&data)[64]);
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void update(const void* input, uint len);
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void finish(byte (&digest)[32]);
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};
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/**
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* Simple PBKDF2 implementation for hard to crack passwords
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* @param output The output buffer for the digested hash
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* @param key The initial key we want to hash
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* @param key_len Length of the key in bytes
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* @param salt The salt we use to iteratively hash the key.
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* @param salt_len Length of the salt in bytes
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* @param iterations Number of salting iterations
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* @return 0 on success, -1 on error
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*/
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int pbkdf2(byte (&output)[SHA_DIGEST_SIZE],
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const byte* key, size_t key_len,
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const byte* salt, size_t salt_len,
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unsigned iterations);
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#endif
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