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