1 /* apps/rand.c */
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 "apps.h"
57
58 #include <ctype.h>
59 #include <stdio.h>
60 #include <string.h>
61
62 #include <openssl/bio.h>
63 #include <openssl/err.h>
64 #include <openssl/rand.h>
65
66 #undef PROG
67 #define PROG rand_main
68
69 /* -out file - write to file
70 * -rand file:file - PRNG seed files
71 * -base64 - base64 encode output
72 * -hex - hex encode output
73 * num - write 'num' bytes
74 */
75
76 int MAIN(int, char **);
77
MAIN(int argc,char ** argv)78 int MAIN(int argc, char **argv)
79 {
80 #ifndef OPENSSL_NO_ENGINE
81 ENGINE *e = NULL;
82 #endif
83 int i, r, ret = 1;
84 int badopt;
85 char *outfile = NULL;
86 char *inrand = NULL;
87 int base64 = 0;
88 int hex = 0;
89 BIO *out = NULL;
90 int num = -1;
91 #ifndef OPENSSL_NO_ENGINE
92 char *engine=NULL;
93 #endif
94
95 apps_startup();
96
97 if (bio_err == NULL)
98 if ((bio_err = BIO_new(BIO_s_file())) != NULL)
99 BIO_set_fp(bio_err, stderr, BIO_NOCLOSE|BIO_FP_TEXT);
100
101 if (!load_config(bio_err, NULL))
102 goto err;
103
104 badopt = 0;
105 i = 0;
106 while (!badopt && argv[++i] != NULL)
107 {
108 if (strcmp(argv[i], "-out") == 0)
109 {
110 if ((argv[i+1] != NULL) && (outfile == NULL))
111 outfile = argv[++i];
112 else
113 badopt = 1;
114 }
115 #ifndef OPENSSL_NO_ENGINE
116 else if (strcmp(argv[i], "-engine") == 0)
117 {
118 if ((argv[i+1] != NULL) && (engine == NULL))
119 engine = argv[++i];
120 else
121 badopt = 1;
122 }
123 #endif
124 else if (strcmp(argv[i], "-rand") == 0)
125 {
126 if ((argv[i+1] != NULL) && (inrand == NULL))
127 inrand = argv[++i];
128 else
129 badopt = 1;
130 }
131 else if (strcmp(argv[i], "-base64") == 0)
132 {
133 if (!base64)
134 base64 = 1;
135 else
136 badopt = 1;
137 }
138 else if (strcmp(argv[i], "-hex") == 0)
139 {
140 if (!hex)
141 hex = 1;
142 else
143 badopt = 1;
144 }
145 else if (isdigit((unsigned char)argv[i][0]))
146 {
147 if (num < 0)
148 {
149 r = sscanf(argv[i], "%d", &num);
150 if (r == 0 || num < 0)
151 badopt = 1;
152 }
153 else
154 badopt = 1;
155 }
156 else
157 badopt = 1;
158 }
159
160 if (hex && base64)
161 badopt = 1;
162
163 if (num < 0)
164 badopt = 1;
165
166 if (badopt)
167 {
168 BIO_printf(bio_err, "Usage: rand [options] num\n");
169 BIO_printf(bio_err, "where options are\n");
170 BIO_printf(bio_err, "-out file - write to file\n");
171 #ifndef OPENSSL_NO_ENGINE
172 BIO_printf(bio_err, "-engine e - use engine e, possibly a hardware device.\n");
173 #endif
174 BIO_printf(bio_err, "-rand file%cfile%c... - seed PRNG from files\n", LIST_SEPARATOR_CHAR, LIST_SEPARATOR_CHAR);
175 BIO_printf(bio_err, "-base64 - base64 encode output\n");
176 BIO_printf(bio_err, "-hex - hex encode output\n");
177 goto err;
178 }
179
180 #ifndef OPENSSL_NO_ENGINE
181 e = setup_engine(bio_err, engine, 0);
182 #endif
183
184 app_RAND_load_file(NULL, bio_err, (inrand != NULL));
185 if (inrand != NULL)
186 BIO_printf(bio_err,"%ld semi-random bytes loaded\n",
187 app_RAND_load_files(inrand));
188
189 out = BIO_new(BIO_s_file());
190 if (out == NULL)
191 goto err;
192 if (outfile != NULL)
193 r = BIO_write_filename(out, outfile);
194 else
195 {
196 r = BIO_set_fp(out, stdout, BIO_NOCLOSE | BIO_FP_TEXT);
197 #ifdef OPENSSL_SYS_VMS
198 {
199 BIO *tmpbio = BIO_new(BIO_f_linebuffer());
200 out = BIO_push(tmpbio, out);
201 }
202 #endif
203 }
204 if (r <= 0)
205 goto err;
206
207 if (base64)
208 {
209 BIO *b64 = BIO_new(BIO_f_base64());
210 if (b64 == NULL)
211 goto err;
212 out = BIO_push(b64, out);
213 }
214
215 while (num > 0)
216 {
217 unsigned char buf[4096];
218 int chunk;
219
220 chunk = num;
221 if (chunk > (int)sizeof(buf))
222 chunk = sizeof buf;
223 r = RAND_bytes(buf, chunk);
224 if (r <= 0)
225 goto err;
226 if (!hex)
227 BIO_write(out, buf, chunk);
228 else
229 {
230 for (i = 0; i < chunk; i++)
231 BIO_printf(out, "%02x", buf[i]);
232 }
233 num -= chunk;
234 }
235 if (hex)
236 BIO_puts(out, "\n");
237 (void)BIO_flush(out);
238
239 app_RAND_write_file(NULL, bio_err);
240 ret = 0;
241
242 err:
243 ERR_print_errors(bio_err);
244 if (out)
245 BIO_free_all(out);
246 apps_shutdown();
247 OPENSSL_EXIT(ret);
248 }
249