Annotation of src/usr.bin/openssl/rand.c, Revision 1.16
1.16 ! tb 1: /* $OpenBSD: rand.c,v 1.15 2022/11/11 17:07:39 joshua Exp $ */
1.1 jsing 2: /* ====================================================================
3: * Copyright (c) 1998-2001 The OpenSSL Project. All rights reserved.
4: *
5: * Redistribution and use in source and binary forms, with or without
6: * modification, are permitted provided that the following conditions
7: * are met:
8: *
9: * 1. Redistributions of source code must retain the above copyright
10: * notice, this list of conditions and the following disclaimer.
11: *
12: * 2. Redistributions in binary form must reproduce the above copyright
13: * notice, this list of conditions and the following disclaimer in
14: * the documentation and/or other materials provided with the
15: * distribution.
16: *
17: * 3. All advertising materials mentioning features or use of this
18: * software must display the following acknowledgment:
19: * "This product includes software developed by the OpenSSL Project
20: * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
21: *
22: * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
23: * endorse or promote products derived from this software without
24: * prior written permission. For written permission, please contact
25: * openssl-core@openssl.org.
26: *
27: * 5. Products derived from this software may not be called "OpenSSL"
28: * nor may "OpenSSL" appear in their names without prior written
29: * permission of the OpenSSL Project.
30: *
31: * 6. Redistributions of any form whatsoever must retain the following
32: * acknowledgment:
33: * "This product includes software developed by the OpenSSL Project
34: * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
35: *
36: * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
37: * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
38: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
39: * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
40: * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
41: * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
42: * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
43: * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
44: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
45: * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
46: * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
47: * OF THE POSSIBILITY OF SUCH DAMAGE.
48: * ====================================================================
49: *
50: * This product includes cryptographic software written by Eric Young
51: * (eay@cryptsoft.com). This product includes software written by Tim
52: * Hudson (tjh@cryptsoft.com).
53: *
54: */
55:
56: #include <ctype.h>
57: #include <stdio.h>
58: #include <string.h>
59:
60: #include "apps.h"
61:
62: #include <openssl/bio.h>
63: #include <openssl/err.h>
64:
1.16 ! tb 65: static struct {
1.2 jsing 66: int base64;
67: int hex;
68: char *outfile;
69: } rand_config;
70:
1.14 guenther 71: static const struct option rand_options[] = {
1.2 jsing 72: {
73: .name = "base64",
74: .desc = "Perform base64 encoding on output",
75: .type = OPTION_FLAG,
76: .opt.flag = &rand_config.base64,
77: },
78: {
79: .name = "hex",
80: .desc = "Hexadecimal output",
81: .type = OPTION_FLAG,
82: .opt.flag = &rand_config.hex,
83: },
84: {
85: .name = "out",
86: .argname = "file",
87: .desc = "Write to the given file instead of standard output",
88: .type = OPTION_ARG,
89: .opt.arg = &rand_config.outfile,
90: },
1.4 bcook 91: {NULL},
1.2 jsing 92: };
93:
94: static void
95: rand_usage()
96: {
97: fprintf(stderr,
1.8 bcook 98: "usage: rand [-base64 | -hex] [-out file] num\n");
1.2 jsing 99: options_usage(rand_options);
100: }
1.1 jsing 101:
102: int
103: rand_main(int argc, char **argv)
104: {
1.2 jsing 105: char *num_bytes = NULL;
106: int ret = 1;
107: int badopt = 0;
108: int num = -1;
109: int i, r;
1.1 jsing 110: BIO *out = NULL;
1.9 doug 111:
1.15 joshua 112: if (pledge("stdio cpath wpath rpath", NULL) == -1) {
113: perror("pledge");
114: exit(1);
1.9 doug 115: }
1.3 jsing 116:
117: memset(&rand_config, 0, sizeof(rand_config));
1.1 jsing 118:
1.6 jsing 119: if (options_parse(argc, argv, rand_options, &num_bytes, NULL) != 0) {
1.2 jsing 120: rand_usage();
121: return (1);
1.1 jsing 122: }
123:
1.2 jsing 124: if (num_bytes != NULL) {
125: r = sscanf(num_bytes, "%d", &num);
126: if (r == 0 || num < 0)
127: badopt = 1;
128: } else
1.1 jsing 129: badopt = 1;
130:
1.2 jsing 131: if (rand_config.hex && rand_config.base64)
1.1 jsing 132: badopt = 1;
133:
134: if (badopt) {
1.2 jsing 135: rand_usage();
1.1 jsing 136: goto err;
137: }
138:
139: out = BIO_new(BIO_s_file());
140: if (out == NULL)
141: goto err;
1.2 jsing 142: if (rand_config.outfile != NULL)
143: r = BIO_write_filename(out, rand_config.outfile);
144: else
1.1 jsing 145: r = BIO_set_fp(out, stdout, BIO_NOCLOSE | BIO_FP_TEXT);
146: if (r <= 0)
147: goto err;
1.2 jsing 148: if (rand_config.base64) {
1.1 jsing 149: BIO *b64 = BIO_new(BIO_f_base64());
150: if (b64 == NULL)
151: goto err;
152: out = BIO_push(b64, out);
153: }
1.2 jsing 154:
1.1 jsing 155: while (num > 0) {
156: unsigned char buf[4096];
157: int chunk;
158:
159: chunk = num;
160: if (chunk > (int) sizeof(buf))
1.2 jsing 161: chunk = sizeof(buf);
1.5 jsing 162: arc4random_buf(buf, chunk);
1.2 jsing 163: if (rand_config.hex) {
1.1 jsing 164: for (i = 0; i < chunk; i++)
165: BIO_printf(out, "%02x", buf[i]);
1.2 jsing 166: } else
167: BIO_write(out, buf, chunk);
1.1 jsing 168: num -= chunk;
169: }
1.2 jsing 170:
171: if (rand_config.hex)
1.1 jsing 172: BIO_puts(out, "\n");
173: (void) BIO_flush(out);
174:
175: ret = 0;
176:
1.13 jsing 177: err:
1.1 jsing 178: ERR_print_errors(bio_err);
1.12 jsing 179: BIO_free_all(out);
1.1 jsing 180:
181: return (ret);
182: }
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