apps/rand.c

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