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compilation.h

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  • sha.h 2.33 KiB
    /* sha.h
     *
     * The sha1 and sha256 hash functions.
     */
    
    /* nettle, low-level cryptographics library
     *
     * Copyright (C) 2001 Niels Mller
     *  
     * The nettle library is free software; you can redistribute it and/or modify
     * it under the terms of the GNU Lesser General Public License as published by
     * the Free Software Foundation; either version 2.1 of the License, or (at your
     * option) any later version.
     * 
     * The nettle library is distributed in the hope that it will be useful, but
     * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
     * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
     * License for more details.
     * 
     * You should have received a copy of the GNU Lesser General Public License
     * along with the nettle library; see the file COPYING.LIB.  If not, write to
     * the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
     * MA 02111-1307, USA.
     */
     
    #ifndef NETTLE_SHA_H_INCLUDED
    #define NETTLE_SHA_H_INCLUDED
    
    #include <inttypes.h>
    
    /* SHA1 */
    
    #define SHA1_DIGEST_SIZE 20
    #define SHA1_DATA_SIZE 64
    
    /* Digest is kept internally as 5 32-bit words. */
    #define _SHA1_DIGEST_LENGTH 5
    
    struct sha1_ctx
    {
      uint32_t digest[_SHA1_DIGEST_LENGTH];   /* Message digest */
      uint32_t count_low, count_high;         /* 64-bit block count */
      uint8_t block[SHA1_DATA_SIZE];          /* SHA1 data buffer */
      unsigned int index;                     /* index into buffer */
    };
    
    void
    sha1_init(struct sha1_ctx *ctx);
    
    void
    sha1_update(struct sha1_ctx *ctx,
    	    unsigned length,
    	    const uint8_t *data);
    
    void
    sha1_digest(struct sha1_ctx *ctx,
    	    unsigned length,
    	    uint8_t *digest);
    
    /* SHA256 */
    
    #define SHA256_DIGEST_SIZE 32
    #define SHA256_DATA_SIZE 64
    
    /* Digest is kept internally as 8 32-bit words. */
    #define _SHA256_DIGEST_LENGTH 8
    
    struct sha256_ctx
    {
      uint32_t state[_SHA256_DIGEST_LENGTH];    /* State variables */
      uint32_t count_low, count_high;           /* 64-bit block count */
      uint8_t block[SHA256_DATA_SIZE];          /* SHA256 data buffer */
      unsigned int index;                       /* index into buffer */
    };
    
    void
    sha256_init(struct sha256_ctx *ctx);
    
    void
    sha256_update(struct sha256_ctx *ctx,
    	      unsigned length,
    	      const uint8_t *data);
    
    void
    sha256_digest(struct sha256_ctx *ctx,
    	      unsigned length,
    	      uint8_t *digest);
    
    
    #endif /* NETTLE_SHA_H_INCLUDED */