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           - base64 encode output
  72  * -hex              - hex encode output
  73  * num               - write 'num' bytes
  74  */
  75
  76 int MAIN(int, char **);
  77
  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         }