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