Annotation of src/usr.bin/openssl/rand.c, Revision 1.8
1.8 ! bcook 1: /* $OpenBSD: rand.c,v 1.7 2015/08/22 16:36:05 jsing 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:
1.2 jsing 65: struct {
66: int base64;
67: int hex;
68: char *outfile;
69: } rand_config;
70:
71: struct option rand_options[] = {
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;
1.3 jsing 111:
112: memset(&rand_config, 0, sizeof(rand_config));
1.1 jsing 113:
1.6 jsing 114: if (options_parse(argc, argv, rand_options, &num_bytes, NULL) != 0) {
1.2 jsing 115: rand_usage();
116: return (1);
1.1 jsing 117: }
118:
1.2 jsing 119: if (num_bytes != NULL) {
120: r = sscanf(num_bytes, "%d", &num);
121: if (r == 0 || num < 0)
122: badopt = 1;
123: } else
1.1 jsing 124: badopt = 1;
125:
1.2 jsing 126: if (rand_config.hex && rand_config.base64)
1.1 jsing 127: badopt = 1;
128:
129: if (badopt) {
1.2 jsing 130: rand_usage();
1.1 jsing 131: goto err;
132: }
133:
134: out = BIO_new(BIO_s_file());
135: if (out == NULL)
136: goto err;
1.2 jsing 137: if (rand_config.outfile != NULL)
138: r = BIO_write_filename(out, rand_config.outfile);
139: else
1.1 jsing 140: r = BIO_set_fp(out, stdout, BIO_NOCLOSE | BIO_FP_TEXT);
141: if (r <= 0)
142: goto err;
1.2 jsing 143: if (rand_config.base64) {
1.1 jsing 144: BIO *b64 = BIO_new(BIO_f_base64());
145: if (b64 == NULL)
146: goto err;
147: out = BIO_push(b64, out);
148: }
1.2 jsing 149:
1.1 jsing 150: while (num > 0) {
151: unsigned char buf[4096];
152: int chunk;
153:
154: chunk = num;
155: if (chunk > (int) sizeof(buf))
1.2 jsing 156: chunk = sizeof(buf);
1.5 jsing 157: arc4random_buf(buf, chunk);
1.2 jsing 158: if (rand_config.hex) {
1.1 jsing 159: for (i = 0; i < chunk; i++)
160: BIO_printf(out, "%02x", buf[i]);
1.2 jsing 161: } else
162: BIO_write(out, buf, chunk);
1.1 jsing 163: num -= chunk;
164: }
1.2 jsing 165:
166: if (rand_config.hex)
1.1 jsing 167: BIO_puts(out, "\n");
168: (void) BIO_flush(out);
169:
170: ret = 0;
171:
172: err:
173: ERR_print_errors(bio_err);
174: if (out)
175: BIO_free_all(out);
176:
177: return (ret);
178: }