apps/genrsa.c

   1 /* apps/genrsa.c */
   2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
   3  * All rights reserved.
   4  *
   5  * This package is an SSL implementation written
   6  * by Eric Young (eay@cryptsoft.com).
   7  * The implementation was written so as to conform with Netscapes SSL.
   8  *
   9  * This library is free for commercial and non-commercial use as long as
  10  * the following conditions are aheared to.  The following conditions
  11  * apply to all code found in this distribution, be it the RC4, RSA,
  12  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
  13  * included with this distribution is covered by the same copyright terms
  14  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
  15  *
  16  * Copyright remains Eric Young's, and as such any Copyright notices in
  17  * the code are not to be removed.
  18  * If this package is used in a product, Eric Young should be given attribution
  19  * as the author of the parts of the library used.
  20  * This can be in the form of a textual message at program startup or
  21  * in documentation (online or textual) provided with the package.
  22  *
  23  * Redistribution and use in source and binary forms, with or without
  24  * modification, are permitted provided that the following conditions
  25  * are met:
  26  * 1. Redistributions of source code must retain the copyright
  27  *    notice, this list of conditions and the following disclaimer.
  28  * 2. Redistributions in binary form must reproduce the above copyright
  29  *    notice, this list of conditions and the following disclaimer in the
  30  *    documentation and/or other materials provided with the distribution.
  31  * 3. All advertising materials mentioning features or use of this software
  32  *    must display the following acknowledgement:
  33  *    "This product includes cryptographic software written by
  34  *     Eric Young (eay@cryptsoft.com)"
  35  *    The word 'cryptographic' can be left out if the rouines from the library
  36  *    being used are not cryptographic related :-).
  37  * 4. If you include any Windows specific code (or a derivative thereof) from
  38  *    the apps directory (application code) you must include an acknowledgement:
  39  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
  40  *
  41  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
  42  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  43  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  44  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  45  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  46  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  47  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  48  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  49  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  50  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  51  * SUCH DAMAGE.
  52  *
  53  * The licence and distribution terms for any publically available version or
  54  * derivative of this code cannot be changed.  i.e. this code cannot simply be
  55  * copied and put under another distribution licence
  56  * [including the GNU Public Licence.]
  57  */
  58
  59 #ifndef OPENSSL_NO_RSA
  60 #include <stdio.h>
  61 #include <string.h>
  62 #include <sys/types.h>
  63 #include <sys/stat.h>
  64 #include "apps.h"
  65 #include <openssl/bio.h>
  66 #include <openssl/err.h>
  67 #include <openssl/bn.h>
  68 #include <openssl/rsa.h>
  69 #include <openssl/evp.h>
  70 #include <openssl/x509.h>
  71 #include <openssl/pem.h>
  72 #include <openssl/engine.h>
  73
  74 #define DEFBITS 512
  75 #undef PROG
  76 #define PROG genrsa_main
  77
  78 static void MS_CALLBACK genrsa_cb(int p, int n, void *arg);
  79
  80 int MAIN(int, char **);
  81
  82 int MAIN(int argc, char **argv)
  83         {
  84         ENGINE *e = NULL;
  85         int ret=1;
  86         RSA *rsa=NULL;
  87         int i,num=DEFBITS;
  88         long l;
  89         const EVP_CIPHER *enc=NULL;
  90         unsigned long f4=RSA_F4;
  91         char *outfile=NULL;
  92         char *passargout = NULL, *passout = NULL;
  93         char *engine=NULL;
  94         char *inrand=NULL;
  95         BIO *out=NULL;
  96
  97         apps_startup();
  98
  99         if (bio_err == NULL)
 100                 if ((bio_err=BIO_new(BIO_s_file())) != NULL)
 101                         BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT);
 102         if ((out=BIO_new(BIO_s_file())) == NULL)
 103                 {
 104                 BIO_printf(bio_err,"unable to create BIO for output\n");
 105                 goto err;
 106                 }
 107
 108         argv++;
 109         argc--;
 110         for (;;)
 111                 {
 112                 if (argc <= 0) break;
 113                 if (strcmp(*argv,"-out") == 0)
 114                         {
 115                         if (--argc < 1) goto bad;
 116                         outfile= *(++argv);
 117                         }
 118                 else if (strcmp(*argv,"-3") == 0)
 119                         f4=3;
 120                 else if (strcmp(*argv,"-F4") == 0 || strcmp(*argv,"-f4") == 0)
 121                         f4=RSA_F4;
 122                 else if (strcmp(*argv,"-engine") == 0)
 123                         {
 124                         if (--argc < 1) goto bad;
 125                         engine= *(++argv);
 126                         }
 127                 else if (strcmp(*argv,"-rand") == 0)
 128                         {
 129                         if (--argc < 1) goto bad;
 130                         inrand= *(++argv);
 131                         }
 132 #ifndef OPENSSL_NO_DES
 133                 else if (strcmp(*argv,"-des") == 0)
 134                         enc=EVP_des_cbc();
 135                 else if (strcmp(*argv,"-des3") == 0)
 136                         enc=EVP_des_ede3_cbc();
 137 #endif
 138 #ifndef OPENSSL_NO_IDEA
 139                 else if (strcmp(*argv,"-idea") == 0)
 140                         enc=EVP_idea_cbc();
 141 #endif
 142                 else if (strcmp(*argv,"-passout") == 0)
 143                         {
 144                         if (--argc < 1) goto bad;
 145                         passargout= *(++argv);
 146                         }
 147                 else
 148                         break;
 149                 argv++;
 150                 argc--;
 151                 }
 152         if ((argc >= 1) && ((sscanf(*argv,"%d",&num) == 0) || (num < 0)))
 153                 {
 154 bad:
 155                 BIO_printf(bio_err,"usage: genrsa [args] [numbits]\n");
 156                 BIO_printf(bio_err," -des            encrypt the generated key with DES in cbc mode\n");
 157                 BIO_printf(bio_err," -des3           encrypt the generated key with DES in ede cbc mode (168 bit key)\n");
 158 #ifndef OPENSSL_NO_IDEA
 159                 BIO_printf(bio_err," -idea           encrypt the generated key with IDEA in cbc mode\n");
 160 #endif
 161                 BIO_printf(bio_err," -out file       output the key to 'file\n");
 162                 BIO_printf(bio_err," -passout arg    output file pass phrase source\n");
 163                 BIO_printf(bio_err," -f4             use F4 (0x10001) for the E value\n");
 164                 BIO_printf(bio_err," -3              use 3 for the E value\n");
 165                 BIO_printf(bio_err," -engine e       use engine e, possibly a hardware device.\n");
 166                 BIO_printf(bio_err," -rand file%cfile%c...\n", LIST_SEPARATOR_CHAR, LIST_SEPARATOR_CHAR);
 167                 BIO_printf(bio_err,"                 load the file (or the files in the directory) into\n");
 168                 BIO_printf(bio_err,"                 the random number generator\n");
 169                 goto err;
 170                 }
 171
 172         ERR_load_crypto_strings();
 173
 174         if(!app_passwd(bio_err, NULL, passargout, NULL, &passout)) {
 175                 BIO_printf(bio_err, "Error getting password\n");
 176                 goto err;
 177         }
 178
 179         e = setup_engine(bio_err, engine, 0);
 180
 181         if (outfile == NULL)
 182                 {
 183                 BIO_set_fp(out,stdout,BIO_NOCLOSE);
 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         else
 192                 {
 193                 if (BIO_write_filename(out,outfile) <= 0)
 194                         {
 195                         perror(outfile);
 196                         goto err;
 197                         }
 198                 }
 199
 200         if (!app_RAND_load_file(NULL, bio_err, 1) && inrand == NULL
 201                 && !RAND_status())
 202                 {
 203                 BIO_printf(bio_err,"warning, not much extra random data, consider using the -rand option\n");
 204                 }
 205         if (inrand != NULL)
 206                 BIO_printf(bio_err,"%ld semi-random bytes loaded\n",
 207                         app_RAND_load_files(inrand));
 208
 209         BIO_printf(bio_err,"Generating RSA private key, %d bit long modulus\n",
 210                 num);
 211         rsa=RSA_generate_key(num,f4,genrsa_cb,bio_err);
 212
 213         app_RAND_write_file(NULL, bio_err);
 214
 215         if (rsa == NULL) goto err;
 216
 217         /* We need to do the following for when the base number size is <
 218          * long, esp windows 3.1 :-(. */
 219         l=0L;
 220         for (i=0; i<rsa->e->top; i++)
 221                 {
 222 #ifndef SIXTY_FOUR_BIT
 223                 l<<=BN_BITS4;
 224                 l<<=BN_BITS4;
 225 #endif
 226                 l+=rsa->e->d[i];
 227                 }
 228         BIO_printf(bio_err,"e is %ld (0x%lX)\n",l,l);
 229         if (!PEM_write_bio_RSAPrivateKey(out,rsa,enc,NULL,0,NULL, passout))
 230                 goto err;
 231
 232         ret=0;
 233 err:
 234         if (rsa != NULL) RSA_free(rsa);
 235         if (out != NULL) BIO_free_all(out);
 236         if(passout) OPENSSL_free(passout);
 237         if (ret != 0)
 238                 ERR_print_errors(bio_err);
 239         EXIT(ret);
 240         }
 241
 242 static void MS_CALLBACK genrsa_cb(int p, int n, void *arg)
 243         {
 244         char c='*';
 245
 246         if (p == 0) c='.';
 247         if (p == 1) c='+';
 248         if (p == 2) c='*';
 249         if (p == 3) c='\n';
 250         BIO_write((BIO *)arg,&c,1);
 251         (void)BIO_flush((BIO *)arg);
 252 #ifdef LINT
 253         p=n;
 254 #endif
 255         }
 256 #else /* !OPENSSL_NO_RSA */
 257
 258 # if PEDANTIC
 259 static void *dummy=&dummy;
 260 # endif
 261
 262 #endif