1 /*
2 * FILE: sha2prog.c
3 * AUTHOR: Aaron D. Gifford - http://www.aarongifford.com/
4 *
5 * Copyright (c) 2000-2001, Aaron D. Gifford
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
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 * 3. Neither the name of the copyright holder nor the names of contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTOR(S) ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTOR(S) BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 *
32 * $Id: sha2prog.c,v 1.1 2001/11/08 00:02:11 adg Exp adg $
33 */
34
35 #include <stdio.h>
36 #include <sysexits.h>
37 #include <sys/types.h>
38 #include <sys/uio.h>
39 #include <unistd.h>
40
41 #include "sha2.h"
42
usage(char * prog,char * msg)43 void usage(char *prog, char *msg) {
44 fprintf(stderr, "%s\nUsage:\t%s [options] [<file>]\nOptions:\n\t-256\tGenerate SHA-256 hash\n\t-384\tGenerate SHA-284 hash\n\t-512\tGenerate SHA-512 hash\n\t-ALL\tGenerate all three hashes\n\t-q\tQuiet mode - only output hexadecimal hashes, one per line\n\n", msg, prog);
45 exit(-1);
46 }
47
48 #define BUFLEN 16384
49
main(int argc,char ** argv)50 int main(int argc, char **argv) {
51 int kl, l, fd, ac;
52 int quiet = 0, hash = 0;
53 char *av, *file = (char*)0;
54 FILE *IN = (FILE*)0;
55 SHA256_CTX ctx256;
56 SHA384_CTX ctx384;
57 SHA512_CTX ctx512;
58 unsigned char buf[BUFLEN];
59
60 SHA256_Init(&ctx256);
61 SHA384_Init(&ctx384);
62 SHA512_Init(&ctx512);
63
64 /* Read data from STDIN by default */
65 fd = fileno(stdin);
66
67 ac = 1;
68 while (ac < argc) {
69 if (*argv[ac] == '-') {
70 av = argv[ac] + 1;
71 if (!strcmp(av, "q")) {
72 quiet = 1;
73 } else if (!strcmp(av, "256")) {
74 hash |= 1;
75 } else if (!strcmp(av, "384")) {
76 hash |= 2;
77 } else if (!strcmp(av, "512")) {
78 hash |= 4;
79 } else if (!strcmp(av, "ALL")) {
80 hash = 7;
81 } else {
82 usage(argv[0], "Invalid option.");
83 }
84 ac++;
85 } else {
86 file = argv[ac++];
87 if (ac != argc) {
88 usage(argv[0], "Too many arguments.");
89 }
90 if ((IN = fopen(file, "r")) == NULL) {
91 perror(argv[0]);
92 exit(-1);
93 }
94 fd = fileno(IN);
95 }
96 }
97 if (hash == 0)
98 hash = 7; /* Default to ALL */
99
100 kl = 0;
101 while ((l = read(fd,buf,BUFLEN)) > 0) {
102 kl += l;
103 SHA256_Update(&ctx256, (unsigned char*)buf, l);
104 SHA384_Update(&ctx384, (unsigned char*)buf, l);
105 SHA512_Update(&ctx512, (unsigned char*)buf, l);
106 }
107 if (file) {
108 fclose(IN);
109 }
110
111 if (hash & 1) {
112 SHA256_End(&ctx256, buf);
113 if (!quiet)
114 printf("SHA-256 (%s) = ", file);
115 printf("%s\n", buf);
116 }
117 if (hash & 2) {
118 SHA384_End(&ctx384, buf);
119 if (!quiet)
120 printf("SHA-384 (%s) = ", file);
121 printf("%s\n", buf);
122 }
123 if (hash & 4) {
124 SHA512_End(&ctx512, buf);
125 if (!quiet)
126 printf("SHA-512 (%s) = ", file);
127 printf("%s\n", buf);
128 }
129
130 return 1;
131 }
132
133
