rand.c revision 331638 
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    ENGINE *e = NULL;
90    char *engine = NULL;
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        if (strcmp(argv[i], "-out") == 0) {
105            if ((argv[i + 1] != NULL) && (outfile == NULL))
106                outfile = argv[++i];
107            else
108                badopt = 1;
109        }
110#ifndef OPENSSL_NO_ENGINE
111        else if (strcmp(argv[i], "-engine") == 0) {
112            if ((argv[i + 1] != NULL) && (engine == NULL))
113                engine = argv[++i];
114            else
115                badopt = 1;
116        }
117#endif
118        else if (strcmp(argv[i], "-rand") == 0) {
119            if ((argv[i + 1] != NULL) && (inrand == NULL))
120                inrand = argv[++i];
121            else
122                badopt = 1;
123        } else if (strcmp(argv[i], "-base64") == 0) {
124            if (!base64)
125                base64 = 1;
126            else
127                badopt = 1;
128        } else if (strcmp(argv[i], "-hex") == 0) {
129            if (!hex)
130                hex = 1;
131            else
132                badopt = 1;
133        } else if (isdigit((unsigned char)argv[i][0])) {
134            if (num < 0) {
135                r = sscanf(argv[i], "%d", &num);
136                if (r == 0 || num < 0)
137                    badopt = 1;
138            } else
139                badopt = 1;
140        } else
141            badopt = 1;
142    }
143
144    if (hex && base64)
145        badopt = 1;
146
147    if (num < 0)
148        badopt = 1;
149
150    if (badopt) {
151        BIO_printf(bio_err, "Usage: rand [options] num\n");
152        BIO_printf(bio_err, "where options are\n");
153        BIO_printf(bio_err, "-out file             - write to file\n");
154#ifndef OPENSSL_NO_ENGINE
155        BIO_printf(bio_err,
156                   "-engine e             - use engine e, possibly a hardware device.\n");
157#endif
158        BIO_printf(bio_err, "-rand file%cfile%c... - seed PRNG from files\n",
159                   LIST_SEPARATOR_CHAR, LIST_SEPARATOR_CHAR);
160        BIO_printf(bio_err, "-base64               - base64 encode output\n");
161        BIO_printf(bio_err, "-hex                  - hex encode output\n");
162        goto err;
163    }
164    e = setup_engine(bio_err, engine, 0);
165
166    app_RAND_load_file(NULL, bio_err, (inrand != NULL));
167    if (inrand != NULL)
168        BIO_printf(bio_err, "%ld semi-random bytes loaded\n",
169                   app_RAND_load_files(inrand));
170
171    out = BIO_new(BIO_s_file());
172    if (out == NULL)
173        goto err;
174    if (outfile != NULL)
175        r = BIO_write_filename(out, outfile);
176    else {
177        r = BIO_set_fp(out, stdout, BIO_NOCLOSE | BIO_FP_TEXT);
178#ifdef OPENSSL_SYS_VMS
179        {
180            BIO *tmpbio = BIO_new(BIO_f_linebuffer());
181            out = BIO_push(tmpbio, out);
182        }
183#endif
184    }
185    if (r <= 0)
186        goto err;
187
188    if (base64) {
189        BIO *b64 = BIO_new(BIO_f_base64());
190        if (b64 == NULL)
191            goto err;
192        out = BIO_push(b64, out);
193    }
194
195    while (num > 0) {
196        unsigned char buf[4096];
197        int chunk;
198
199        chunk = num;
200        if (chunk > (int)sizeof(buf))
201            chunk = sizeof(buf);
202        r = RAND_bytes(buf, chunk);
203        if (r <= 0)
204            goto err;
205        if (!hex)
206            BIO_write(out, buf, chunk);
207        else {
208            for (i = 0; i < chunk; i++)
209                BIO_printf(out, "%02x", buf[i]);
210        }
211        num -= chunk;
212    }
213    if (hex)
214        BIO_puts(out, "\n");
215    (void)BIO_flush(out);
216
217    app_RAND_write_file(NULL, bio_err);
218    ret = 0;
219
220 err:
221    ERR_print_errors(bio_err);
222    release_engine(e);
223    if (out)
224        BIO_free_all(out);
225    apps_shutdown();
226    OPENSSL_EXIT(ret);
227}
228