rand.c revision 296465 
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/*-
70 * -out file         - write to file
71 * -rand file:file   - PRNG seed files
72 * -base64           - base64 encode output
73 * -hex              - hex encode output
74 * num               - write 'num' bytes
75 */
76
77int MAIN(int, char **);
78
79int MAIN(int argc, char **argv)
80{
81    int i, r, ret = 1;
82    int badopt;
83    char *outfile = NULL;
84    char *inrand = NULL;
85    int base64 = 0;
86    int hex = 0;
87    BIO *out = NULL;
88    int num = -1;
89#ifndef OPENSSL_NO_ENGINE
90    char *engine = NULL;
91#endif
92
93    apps_startup();
94
95    if (bio_err == NULL)
96        if ((bio_err = BIO_new(BIO_s_file())) != NULL)
97            BIO_set_fp(bio_err, stderr, BIO_NOCLOSE | BIO_FP_TEXT);
98
99    if (!load_config(bio_err, NULL))
100        goto err;
101
102    badopt = 0;
103    i = 0;
104    while (!badopt && argv[++i] != NULL) {
105        if (strcmp(argv[i], "-out") == 0) {
106            if ((argv[i + 1] != NULL) && (outfile == NULL))
107                outfile = argv[++i];
108            else
109                badopt = 1;
110        }
111#ifndef OPENSSL_NO_ENGINE
112        else if (strcmp(argv[i], "-engine") == 0) {
113            if ((argv[i + 1] != NULL) && (engine == NULL))
114                engine = argv[++i];
115            else
116                badopt = 1;
117        }
118#endif
119        else if (strcmp(argv[i], "-rand") == 0) {
120            if ((argv[i + 1] != NULL) && (inrand == NULL))
121                inrand = argv[++i];
122            else
123                badopt = 1;
124        } else if (strcmp(argv[i], "-base64") == 0) {
125            if (!base64)
126                base64 = 1;
127            else
128                badopt = 1;
129        } else if (strcmp(argv[i], "-hex") == 0) {
130            if (!hex)
131                hex = 1;
132            else
133                badopt = 1;
134        } else if (isdigit((unsigned char)argv[i][0])) {
135            if (num < 0) {
136                r = sscanf(argv[i], "%d", &num);
137                if (r == 0 || num < 0)
138                    badopt = 1;
139            } else
140                badopt = 1;
141        } else
142            badopt = 1;
143    }
144
145    if (hex && base64)
146        badopt = 1;
147
148    if (num < 0)
149        badopt = 1;
150
151    if (badopt) {
152        BIO_printf(bio_err, "Usage: rand [options] num\n");
153        BIO_printf(bio_err, "where options are\n");
154        BIO_printf(bio_err, "-out file             - write to file\n");
155#ifndef OPENSSL_NO_ENGINE
156        BIO_printf(bio_err,
157                   "-engine e             - use engine e, possibly a hardware device.\n");
158#endif
159        BIO_printf(bio_err, "-rand file%cfile%c... - seed PRNG from files\n",
160                   LIST_SEPARATOR_CHAR, LIST_SEPARATOR_CHAR);
161        BIO_printf(bio_err, "-base64               - base64 encode output\n");
162        BIO_printf(bio_err, "-hex                  - hex encode output\n");
163        goto err;
164    }
165#ifndef OPENSSL_NO_ENGINE
166    setup_engine(bio_err, engine, 0);
167#endif
168
169    app_RAND_load_file(NULL, bio_err, (inrand != NULL));
170    if (inrand != NULL)
171        BIO_printf(bio_err, "%ld semi-random bytes loaded\n",
172                   app_RAND_load_files(inrand));
173
174    out = BIO_new(BIO_s_file());
175    if (out == NULL)
176        goto err;
177    if (outfile != NULL)
178        r = BIO_write_filename(out, outfile);
179    else {
180        r = BIO_set_fp(out, stdout, BIO_NOCLOSE | BIO_FP_TEXT);
181#ifdef OPENSSL_SYS_VMS
182        {
183            BIO *tmpbio = BIO_new(BIO_f_linebuffer());
184            out = BIO_push(tmpbio, out);
185        }
186#endif
187    }
188    if (r <= 0)
189        goto err;
190
191    if (base64) {
192        BIO *b64 = BIO_new(BIO_f_base64());
193        if (b64 == NULL)
194            goto err;
195        out = BIO_push(b64, out);
196    }
197
198    while (num > 0) {
199        unsigned char buf[4096];
200        int chunk;
201
202        chunk = num;
203        if (chunk > (int)sizeof(buf))
204            chunk = sizeof buf;
205        r = RAND_bytes(buf, chunk);
206        if (r <= 0)
207            goto err;
208        if (!hex)
209            BIO_write(out, buf, chunk);
210        else {
211            for (i = 0; i < chunk; i++)
212                BIO_printf(out, "%02x", buf[i]);
213        }
214        num -= chunk;
215    }
216    if (hex)
217        BIO_puts(out, "\n");
218    (void)BIO_flush(out);
219
220    app_RAND_write_file(NULL, bio_err);
221    ret = 0;
222
223 err:
224    ERR_print_errors(bio_err);
225    if (out)
226        BIO_free_all(out);
227    apps_shutdown();
228    OPENSSL_EXIT(ret);
229}
230