Annotation of src/usr.bin/openssl/rand.c, Revision 1.7
1.7 ! jsing 1: /* $OpenBSD: rand.c,v 1.6 2014/12/28 15:48:52 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: char *engine;
68: int hex;
69: char *outfile;
70: } rand_config;
71:
72: struct option rand_options[] = {
73: {
74: .name = "base64",
75: .desc = "Perform base64 encoding on output",
76: .type = OPTION_FLAG,
77: .opt.flag = &rand_config.base64,
78: },
79: #ifndef OPENSSL_NO_ENGINE
80: {
81: .name = "engine",
82: .argname = "id",
83: .desc = "Use the engine specified by the given identifier",
84: .type = OPTION_ARG,
85: .opt.arg = &rand_config.engine,
86: },
87: #endif
88: {
89: .name = "hex",
90: .desc = "Hexadecimal output",
91: .type = OPTION_FLAG,
92: .opt.flag = &rand_config.hex,
93: },
94: {
95: .name = "out",
96: .argname = "file",
97: .desc = "Write to the given file instead of standard output",
98: .type = OPTION_ARG,
99: .opt.arg = &rand_config.outfile,
100: },
1.4 bcook 101: {NULL},
1.2 jsing 102: };
103:
104: static void
105: rand_usage()
106: {
107: fprintf(stderr,
108: "usage: rand [-base64 | -hex] [-engine id] [-out file] num\n");
109: options_usage(rand_options);
110: }
1.1 jsing 111:
112: int
113: rand_main(int argc, char **argv)
114: {
1.2 jsing 115: char *num_bytes = NULL;
116: int ret = 1;
117: int badopt = 0;
118: int num = -1;
119: int i, r;
1.1 jsing 120: BIO *out = NULL;
1.3 jsing 121:
122: memset(&rand_config, 0, sizeof(rand_config));
1.1 jsing 123:
1.6 jsing 124: if (options_parse(argc, argv, rand_options, &num_bytes, NULL) != 0) {
1.2 jsing 125: rand_usage();
126: return (1);
1.1 jsing 127: }
128:
1.2 jsing 129: if (num_bytes != NULL) {
130: r = sscanf(num_bytes, "%d", &num);
131: if (r == 0 || num < 0)
132: badopt = 1;
133: } else
1.1 jsing 134: badopt = 1;
135:
1.2 jsing 136: if (rand_config.hex && rand_config.base64)
1.1 jsing 137: badopt = 1;
138:
139: if (badopt) {
1.2 jsing 140: rand_usage();
1.1 jsing 141: goto err;
142: }
1.2 jsing 143:
1.1 jsing 144: #ifndef OPENSSL_NO_ENGINE
1.2 jsing 145: setup_engine(bio_err, rand_config.engine, 0);
1.1 jsing 146: #endif
147:
148: out = BIO_new(BIO_s_file());
149: if (out == NULL)
150: goto err;
1.2 jsing 151: if (rand_config.outfile != NULL)
152: r = BIO_write_filename(out, rand_config.outfile);
153: else
1.1 jsing 154: r = BIO_set_fp(out, stdout, BIO_NOCLOSE | BIO_FP_TEXT);
155: if (r <= 0)
156: goto err;
1.2 jsing 157: if (rand_config.base64) {
1.1 jsing 158: BIO *b64 = BIO_new(BIO_f_base64());
159: if (b64 == NULL)
160: goto err;
161: out = BIO_push(b64, out);
162: }
1.2 jsing 163:
1.1 jsing 164: while (num > 0) {
165: unsigned char buf[4096];
166: int chunk;
167:
168: chunk = num;
169: if (chunk > (int) sizeof(buf))
1.2 jsing 170: chunk = sizeof(buf);
1.5 jsing 171: arc4random_buf(buf, chunk);
1.2 jsing 172: if (rand_config.hex) {
1.1 jsing 173: for (i = 0; i < chunk; i++)
174: BIO_printf(out, "%02x", buf[i]);
1.2 jsing 175: } else
176: BIO_write(out, buf, chunk);
1.1 jsing 177: num -= chunk;
178: }
1.2 jsing 179:
180: if (rand_config.hex)
1.1 jsing 181: BIO_puts(out, "\n");
182: (void) BIO_flush(out);
183:
184: ret = 0;
185:
186: err:
187: ERR_print_errors(bio_err);
188: if (out)
189: BIO_free_all(out);
190:
191: return (ret);
192: }
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