c_cpp/etc/calc/sha1.h

   1 /*
   2  * sha1 - new NIST Secure Hash Standard-1 (SHA1)
   3  *
   4  * Written 2 September 1992, Peter C. Gutmann.
   5  *
   6  * This file and been extensively modified by:
   7  *
   8  *      Landon Curt Noll
   9  *      http://www.isthe.com/chongo/
  10  *
  11  *      chongo <was here> /\../\
  12  *
  13  * This code has been placed in the public domain.  Please do not
  14  * copyright this code.
  15  *
  16  * LANDON CURT NOLL DISCLAIMS ALL WARRANTIES WITH  REGARD  TO
  17  * THIS  SOFTWARE,  INCLUDING  ALL IMPLIED WARRANTIES OF MER-
  18  * CHANTABILITY AND FITNESS.  IN NO EVENT SHALL  LANDON  CURT
  19  * NOLL  BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL
  20  * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM  LOSS  OF
  21  * USE,  DATA  OR  PROFITS, WHETHER IN AN ACTION OF CONTRACT,
  22  * NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR  IN
  23  * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  24  *
  25  * @(#) $Revision: 30.3 $
  26  * @(#) $Id: sha1.h,v 30.3 2007/07/05 17:37:41 chongo Exp $
  27  * @(#) $Source: /usr/local/src/bin/calc/RCS/sha1.h,v $
  28  *
  29  * This file is not covered under version 2.1 of the GNU LGPL.
  30  */
  31
  32
  33 #if !defined(__SHA1_H__)
  34 #define __SHA1_H__
  35
  36
  37 /* SHA1_CHUNKSIZE must be a power of 2 - fixed value defined by the algorithm */
  38 #define SHA1_CHUNKSIZE (1<<6)
  39 #define SHA1_CHUNKWORDS (SHA1_CHUNKSIZE/sizeof(USB32))
  40
  41 /* SHA1_DIGESTSIZE is a the length of the digest as defined by the algorithm */
  42 #define SHA1_DIGESTSIZE (20)
  43 #define SHA1_DIGESTWORDS (SHA1_DIGESTSIZE/sizeof(USB32))
  44
  45 /* SHA1_LOW - where low 32 bits of 64 bit count is stored during final */
  46 #define SHA1_LOW 15
  47
  48 /* SHA1_HIGH - where high 32 bits of 64 bit count is stored during final */
  49 #define SHA1_HIGH 14
  50
  51 /*
  52  * The structure for storing SHA1 info
  53  *
  54  * We will assume that bit count is a multiple of 8.
  55  */
  56 typedef struct {
  57         USB32 digest[SHA1_DIGESTWORDS]; /* message digest */
  58         USB32 countLo;                  /* 64 bit count: bits 3-34 */
  59         USB32 countHi;                  /* 64 bit count: bits 35-63 */
  60         USB32 datalen;                  /* length of data in data */
  61         USB32 data[SHA1_CHUNKWORDS];    /* SHA1 chunk buffer */
  62 } SHA1_INFO;
  63
  64 /*
  65  * SHA1COUNT(SHA1_INFO*, USB32) - update the 64 bit count in an SHA1_INFO
  66  *
  67  * We will count bytes and convert to bit count during the final
  68  * transform.
  69  */
  70 #define SHA1COUNT(sha1info, count) {                                    \
  71         USB32 tmp_countLo;                                              \
  72         tmp_countLo = (sha1info)->countLo;                              \
  73         if (((sha1info)->countLo += (count)) < tmp_countLo) {           \
  74                 (sha1info)->countHi++;                                  \
  75         }                                                               \
  76 }
  77
  78
  79 #endif /* !__SHA1_H__ */