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105 lines
3.2 KiB
C
105 lines
3.2 KiB
C
/*
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* An generic header for the SHA-2 hash family.
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*
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* Written in 2010 by Lorenz Quack <don@amberfisharts.com>
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*
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* ===================================================================
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* The contents of this file are dedicated to the public domain. To
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* the extent that dedication to the public domain is not available,
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* everyone is granted a worldwide, perpetual, royalty-free,
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* non-exclusive license to exercise all rights associated with the
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* contents of this file for any purpose whatsoever.
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* No rights are reserved.
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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
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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* ===================================================================
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*
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*/
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#ifndef __HASH_SHA2_H
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#define __HASH_SHA2_H
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/* check if implementation set the correct macros */
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#ifndef MODULE_NAME
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#error SHA2 Implementation must define MODULE_NAME before including this header
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#endif
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#ifndef DIGEST_SIZE
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#error SHA2 Implementation must define DIGEST_SIZE before including this header
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#else
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#define DIGEST_SIZE_BITS (DIGEST_SIZE*8)
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#endif
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#ifndef BLOCK_SIZE
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#error SHA2 Implementation must define BLOCK_SIZE before including this header
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#else
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#define BLOCK_SIZE_BITS (BLOCK_SIZE*8)
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#endif
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#ifndef WORD_SIZE
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#error SHA2 Implementation must define WORD_SIZE before including this header
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#else
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#if ((WORD_SIZE != 4) && (WORD_SIZE != 8))
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#error WORD_SIZE must be either 4 or 8
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#else
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#define WORD_SIZE_BITS (WORD_SIZE*8)
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#endif
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#endif
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#ifndef SCHEDULE_SIZE
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#error SHA2 Implementation must define SCHEDULE_SIZE before including this header
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#endif
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/* define some helper macros */
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#define PADDING_SIZE (2 * WORD_SIZE)
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#define LAST_BLOCK_SIZE (BLOCK_SIZE - PADDING_SIZE)
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/* define generic SHA-2 family functions */
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#define Ch(x,y,z) ((x & y) ^ (~x & z))
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#define Maj(x,y,z) ((x & y) ^ (x & z) ^ (y & z))
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#define ROTR(x, n) (((x)>>((n)&(WORD_SIZE_BITS-1)))|((x)<<(WORD_SIZE_BITS-((n)&(WORD_SIZE_BITS-1)))))
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#define SHR(x, n) ((x)>>(n))
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/* determine fixed size types */
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#if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L)
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#include <stdint.h>
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typedef uint8_t U8;
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typedef uint32_t U32;
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typedef uint64_t U64;
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#elif defined(_MSC_VER)
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typedef unsigned char U8;
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typedef unsigned __int64 U64;
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typedef unsigned int U32;
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#elif defined(__sun) || defined(__sun__)
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#include <sys/inttypes.h>
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typedef uint8_t U8;
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typedef uint32_t U32;
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typedef uint64_t U64;
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#endif
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/* typedef a sha2_word_t type of appropriate size */
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#if (WORD_SIZE_BITS == 64)
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typedef U64 sha2_word_t;
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#elif (WORD_SIZE_BITS == 32)
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typedef U32 sha2_word_t;
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#else
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#error According to the FIPS Standard WORD_SIZE_BITS must be either 32 or 64
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#endif
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/* define the hash_state structure */
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typedef struct{
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sha2_word_t state[8];
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int curlen;
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sha2_word_t length_upper, length_lower;
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unsigned char buf[BLOCK_SIZE];
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} hash_state;
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#endif /* __HASH_SHA2_H */
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