src/util/mesa-sha1.c

   1 /* Copyright © 2007 Carl Worth
   2  * Copyright © 2009 Jeremy Huddleston, Julien Cristau, and Matthieu Herrb
   3  * Copyright © 2009-2010 Mikhail Gusarov
   4  * Copyright © 2012 Yaakov Selkowitz and Keith Packard
   5  * Copyright © 2014 Intel Corporation
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a
   8  * copy of this software and associated documentation files (the "Software"),
   9  * to deal in the Software without restriction, including without limitation
  10  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  11  * and/or sell copies of the Software, and to permit persons to whom the
  12  * Software is furnished to do so, subject to the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the next
  15  * paragraph) shall be included in all copies or substantial portions of the
  16  * Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  19  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  21  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  22  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  23  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  24  * DEALINGS IN THE SOFTWARE.
  25  */
  26
  27 #include "sha1/sha1.h"
  28 #include "mesa-sha1.h"
  29
  30 struct mesa_sha1 *
  31 _mesa_sha1_init(void)
  32 {
  33    SHA1_CTX *ctx = malloc(sizeof(*ctx));
  34
  35    if (!ctx)
  36       return NULL;
  37
  38    SHA1Init(ctx);
  39    return (struct mesa_sha1 *) ctx;
  40 }
  41
  42 int
  43 _mesa_sha1_update(struct mesa_sha1 *ctx, const void *data, int size)
  44 {
  45    SHA1_CTX *sha1_ctx = (SHA1_CTX *) ctx;
  46
  47    SHA1Update(sha1_ctx, data, size);
  48    return 1;
  49 }
  50
  51 int
  52 _mesa_sha1_final(struct mesa_sha1 *ctx, unsigned char result[20])
  53 {
  54    SHA1_CTX *sha1_ctx = (SHA1_CTX *) ctx;
  55
  56    SHA1Final(result, sha1_ctx);
  57    free(sha1_ctx);
  58    return 1;
  59 }
  60
  61 void
  62 _mesa_sha1_compute(const void *data, size_t size, unsigned char result[20])
  63 {
  64    struct mesa_sha1 *ctx;
  65
  66    ctx = _mesa_sha1_init();
  67    _mesa_sha1_update(ctx, data, size);
  68    _mesa_sha1_final(ctx, result);
  69 }
  70
  71 char *
  72 _mesa_sha1_format(char *buf, const unsigned char *sha1)
  73 {
  74    static const char hex_digits[] = "0123456789abcdef";
  75    int i;
  76
  77    for (i = 0; i < 40; i += 2) {
  78       buf[i] = hex_digits[sha1[i >> 1] >> 4];
  79       buf[i + 1] = hex_digits[sha1[i >> 1] & 0x0f];
  80    }
  81    buf[i] = '\0';
  82
  83    return buf;
  84 }