tests/sha1sum.c

   1 /*
   2  * Copyright (c) 2006, Stockholms Universitet
   3  * (Stockholm University, Stockholm Sweden)
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  *
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  *
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  *
  17  * 3. Neither the name of the university nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  22  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  25  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  26  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  27  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  28  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  29  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  30  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  31  * POSSIBILITY OF SUCH DAMAGE.
  32  */
  33
  34 #ifdef HAVE_CONFIG_H
  35 #include <config.h>
  36 #endif
  37
  38 #include <stdio.h>
  39 #include <stdlib.h>
  40 #include <err.h>
  41 #include <roken.h>
  42 #include <sha.h>
  43
  44 #ifdef RCSID
  45 RCSID("$Id$");
  46 #endif
  47
  48 static int
  49 do_read(int fd, size_t sz)
  50 {
  51     unsigned char res[SHA_DIGEST_LENGTH];
  52     SHA_CTX ctx;
  53     ssize_t ret;
  54     char *buf;
  55     int i;
  56
  57     buf = malloc(sz);
  58     if (buf == NULL)
  59         err(1, "malloc %u", (unsigned)sz);
  60
  61     SHA1_Init(&ctx);
  62
  63     while ((ret = read(fd, buf, sz)) > 0)
  64         SHA1_Update(&ctx, buf, ret);
  65
  66     SHA1_Final(res, &ctx);
  67     free(buf);
  68
  69     if (ret < 0)
  70         err(1, "read");
  71
  72     for (i = 0; i < SHA_DIGEST_LENGTH; i ++)
  73         printf("%02x", res[i]);
  74     printf("\n");
  75
  76     return ret;
  77 }
  78
  79 int
  80 main (int argc, char **argv)
  81 {
  82     const size_t sz  = 16384;
  83     int fd = STDIN_FILENO;
  84     int ret = 0;
  85
  86     setprogname(argv[0]);
  87
  88     if (argc > 1) {
  89         int arg = 1;
  90         while (--argc) {
  91             char *file = argv[arg];
  92             if ((fd = open(file, O_RDONLY)) < 0)
  93                 err(1, "open %s", file);
  94
  95             printf("%s: \t", file);
  96             (void)do_read(fd, sz);
  97             ret = close(fd);
  98             arg++;
  99         }
 100     } else {
 101         ret = do_read(fd, sz);
 102     }
 103
 104     return ret;
 105 }