81 lines
2.6 KiB
C
81 lines
2.6 KiB
C
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/**
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* @file BHash.h
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* @author Ambroz Bizjak <ambrop7@gmail.com>
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*
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* @section LICENSE
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*
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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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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the author nor the
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* names of its contributors may be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* @section DESCRIPTION
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*
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* Cryptographic hash funtions abstraction.
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*/
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#ifndef BADVPN_SECURITY_BHASH_H
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#define BADVPN_SECURITY_BHASH_H
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#include <stdint.h>
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#include <openssl/md5.h>
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#include <openssl/sha.h>
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#include <misc/debug.h>
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#define BHASH_TYPE_MD5 1
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#define BHASH_TYPE_MD5_SIZE 16
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#define BHASH_TYPE_SHA1 2
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#define BHASH_TYPE_SHA1_SIZE 20
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#define BHASH_MAX_SIZE 20
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/**
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* Checks if the given hash type number is valid.
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*
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* @param type hash type number
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* @return 1 if valid, 0 if not
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*/
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int BHash_type_valid (int type);
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/**
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* Returns the size of a hash.
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*
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* @param cipher hash type number. Must be valid.
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* @return hash size in bytes
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*/
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int BHash_size (int type);
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/**
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* Calculates a hash.
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* {@link BSecurity_GlobalInitThreadSafe} must have been done if this is
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* being called from a non-main thread.
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*
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* @param type hash type number. Must be valid.
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* @param data data to calculate the hash of
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* @param data_len length of data
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* @param out the hash will be written here. Must not overlap with data.
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*/
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void BHash_calculate (int type, uint8_t *data, int data_len, uint8_t *out);
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#endif
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