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      1 /* apps/genrsa.c */
      2 /* Copyright (C) 1995-1998 Eric Young (eay (at) cryptsoft.com)
      3  * All rights reserved.
      4  *
      5  * This package is an SSL implementation written
      6  * by Eric Young (eay (at) 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 (at) 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 (at) 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 (at) 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 #include <openssl/opensslconf.h>
     60 /* Until the key-gen callbacks are modified to use newer prototypes, we allow
     61  * deprecated functions for openssl-internal code */
     62 #ifdef OPENSSL_NO_DEPRECATED
     63 #undef OPENSSL_NO_DEPRECATED
     64 #endif
     65 
     66 #ifndef OPENSSL_NO_RSA
     67 #include <stdio.h>
     68 #include <string.h>
     69 #include <sys/types.h>
     70 #include <sys/stat.h>
     71 #include "apps.h"
     72 #include <openssl/bio.h>
     73 #include <openssl/err.h>
     74 #include <openssl/bn.h>
     75 #include <openssl/rsa.h>
     76 #include <openssl/evp.h>
     77 #include <openssl/x509.h>
     78 #include <openssl/pem.h>
     79 #include <openssl/rand.h>
     80 
     81 #define DEFBITS	512
     82 #undef PROG
     83 #define PROG genrsa_main
     84 
     85 static int MS_CALLBACK genrsa_cb(int p, int n, BN_GENCB *cb);
     86 
     87 int MAIN(int, char **);
     88 
     89 int MAIN(int argc, char **argv)
     90 	{
     91 	BN_GENCB cb;
     92 #ifndef OPENSSL_NO_ENGINE
     93 	ENGINE *e = NULL;
     94 #endif
     95 	int ret=1;
     96 	int i,num=DEFBITS;
     97 	long l;
     98 	const EVP_CIPHER *enc=NULL;
     99 	unsigned long f4=RSA_F4;
    100 	char *outfile=NULL;
    101 	char *passargout = NULL, *passout = NULL;
    102 #ifndef OPENSSL_NO_ENGINE
    103 	char *engine=NULL;
    104 #endif
    105 	char *inrand=NULL;
    106 	BIO *out=NULL;
    107 	BIGNUM *bn = BN_new();
    108 	RSA *rsa = NULL;
    109 
    110 	if(!bn) goto err;
    111 
    112 	apps_startup();
    113 	BN_GENCB_set(&cb, genrsa_cb, bio_err);
    114 
    115 	if (bio_err == NULL)
    116 		if ((bio_err=BIO_new(BIO_s_file())) != NULL)
    117 			BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT);
    118 
    119 	if (!load_config(bio_err, NULL))
    120 		goto err;
    121 	if ((out=BIO_new(BIO_s_file())) == NULL)
    122 		{
    123 		BIO_printf(bio_err,"unable to create BIO for output\n");
    124 		goto err;
    125 		}
    126 
    127 	argv++;
    128 	argc--;
    129 	for (;;)
    130 		{
    131 		if (argc <= 0) break;
    132 		if (strcmp(*argv,"-out") == 0)
    133 			{
    134 			if (--argc < 1) goto bad;
    135 			outfile= *(++argv);
    136 			}
    137 		else if (strcmp(*argv,"-3") == 0)
    138 			f4=3;
    139 		else if (strcmp(*argv,"-F4") == 0 || strcmp(*argv,"-f4") == 0)
    140 			f4=RSA_F4;
    141 #ifndef OPENSSL_NO_ENGINE
    142 		else if (strcmp(*argv,"-engine") == 0)
    143 			{
    144 			if (--argc < 1) goto bad;
    145 			engine= *(++argv);
    146 			}
    147 #endif
    148 		else if (strcmp(*argv,"-rand") == 0)
    149 			{
    150 			if (--argc < 1) goto bad;
    151 			inrand= *(++argv);
    152 			}
    153 #ifndef OPENSSL_NO_DES
    154 		else if (strcmp(*argv,"-des") == 0)
    155 			enc=EVP_des_cbc();
    156 		else if (strcmp(*argv,"-des3") == 0)
    157 			enc=EVP_des_ede3_cbc();
    158 #endif
    159 #ifndef OPENSSL_NO_IDEA
    160 		else if (strcmp(*argv,"-idea") == 0)
    161 			enc=EVP_idea_cbc();
    162 #endif
    163 #ifndef OPENSSL_NO_SEED
    164 		else if (strcmp(*argv,"-seed") == 0)
    165 			enc=EVP_seed_cbc();
    166 #endif
    167 #ifndef OPENSSL_NO_AES
    168 		else if (strcmp(*argv,"-aes128") == 0)
    169 			enc=EVP_aes_128_cbc();
    170 		else if (strcmp(*argv,"-aes192") == 0)
    171 			enc=EVP_aes_192_cbc();
    172 		else if (strcmp(*argv,"-aes256") == 0)
    173 			enc=EVP_aes_256_cbc();
    174 #endif
    175 #ifndef OPENSSL_NO_CAMELLIA
    176 		else if (strcmp(*argv,"-camellia128") == 0)
    177 			enc=EVP_camellia_128_cbc();
    178 		else if (strcmp(*argv,"-camellia192") == 0)
    179 			enc=EVP_camellia_192_cbc();
    180 		else if (strcmp(*argv,"-camellia256") == 0)
    181 			enc=EVP_camellia_256_cbc();
    182 #endif
    183 		else if (strcmp(*argv,"-passout") == 0)
    184 			{
    185 			if (--argc < 1) goto bad;
    186 			passargout= *(++argv);
    187 			}
    188 		else
    189 			break;
    190 		argv++;
    191 		argc--;
    192 		}
    193 	if ((argc >= 1) && ((sscanf(*argv,"%d",&num) == 0) || (num < 0)))
    194 		{
    195 bad:
    196 		BIO_printf(bio_err,"usage: genrsa [args] [numbits]\n");
    197 		BIO_printf(bio_err," -des            encrypt the generated key with DES in cbc mode\n");
    198 		BIO_printf(bio_err," -des3           encrypt the generated key with DES in ede cbc mode (168 bit key)\n");
    199 #ifndef OPENSSL_NO_IDEA
    200 		BIO_printf(bio_err," -idea           encrypt the generated key with IDEA in cbc mode\n");
    201 #endif
    202 #ifndef OPENSSL_NO_SEED
    203 		BIO_printf(bio_err," -seed\n");
    204 		BIO_printf(bio_err,"                 encrypt PEM output with cbc seed\n");
    205 #endif
    206 #ifndef OPENSSL_NO_AES
    207 		BIO_printf(bio_err," -aes128, -aes192, -aes256\n");
    208 		BIO_printf(bio_err,"                 encrypt PEM output with cbc aes\n");
    209 #endif
    210 #ifndef OPENSSL_NO_CAMELLIA
    211 		BIO_printf(bio_err," -camellia128, -camellia192, -camellia256\n");
    212 		BIO_printf(bio_err,"                 encrypt PEM output with cbc camellia\n");
    213 #endif
    214 		BIO_printf(bio_err," -out file       output the key to 'file\n");
    215 		BIO_printf(bio_err," -passout arg    output file pass phrase source\n");
    216 		BIO_printf(bio_err," -f4             use F4 (0x10001) for the E value\n");
    217 		BIO_printf(bio_err," -3              use 3 for the E value\n");
    218 #ifndef OPENSSL_NO_ENGINE
    219 		BIO_printf(bio_err," -engine e       use engine e, possibly a hardware device.\n");
    220 #endif
    221 		BIO_printf(bio_err," -rand file%cfile%c...\n", LIST_SEPARATOR_CHAR, LIST_SEPARATOR_CHAR);
    222 		BIO_printf(bio_err,"                 load the file (or the files in the directory) into\n");
    223 		BIO_printf(bio_err,"                 the random number generator\n");
    224 		goto err;
    225 		}
    226 
    227 	ERR_load_crypto_strings();
    228 
    229 	if(!app_passwd(bio_err, NULL, passargout, NULL, &passout)) {
    230 		BIO_printf(bio_err, "Error getting password\n");
    231 		goto err;
    232 	}
    233 
    234 #ifndef OPENSSL_NO_ENGINE
    235         e = setup_engine(bio_err, engine, 0);
    236 #endif
    237 
    238 	if (outfile == NULL)
    239 		{
    240 		BIO_set_fp(out,stdout,BIO_NOCLOSE);
    241 #ifdef OPENSSL_SYS_VMS
    242 		{
    243 		BIO *tmpbio = BIO_new(BIO_f_linebuffer());
    244 		out = BIO_push(tmpbio, out);
    245 		}
    246 #endif
    247 		}
    248 	else
    249 		{
    250 		if (BIO_write_filename(out,outfile) <= 0)
    251 			{
    252 			perror(outfile);
    253 			goto err;
    254 			}
    255 		}
    256 
    257 	if (!app_RAND_load_file(NULL, bio_err, 1) && inrand == NULL
    258 		&& !RAND_status())
    259 		{
    260 		BIO_printf(bio_err,"warning, not much extra random data, consider using the -rand option\n");
    261 		}
    262 	if (inrand != NULL)
    263 		BIO_printf(bio_err,"%ld semi-random bytes loaded\n",
    264 			app_RAND_load_files(inrand));
    265 
    266 	BIO_printf(bio_err,"Generating RSA private key, %d bit long modulus\n",
    267 		num);
    268 #ifdef OPENSSL_NO_ENGINE
    269 	rsa = RSA_new();
    270 #else
    271 	rsa = RSA_new_method(e);
    272 #endif
    273 	if (!rsa)
    274 		goto err;
    275 
    276 	if(!BN_set_word(bn, f4) || !RSA_generate_key_ex(rsa, num, bn, &cb))
    277 		goto err;
    278 
    279 	app_RAND_write_file(NULL, bio_err);
    280 
    281 	/* We need to do the following for when the base number size is <
    282 	 * long, esp windows 3.1 :-(. */
    283 	l=0L;
    284 	for (i=0; i<rsa->e->top; i++)
    285 		{
    286 #ifndef SIXTY_FOUR_BIT
    287 		l<<=BN_BITS4;
    288 		l<<=BN_BITS4;
    289 #endif
    290 		l+=rsa->e->d[i];
    291 		}
    292 	BIO_printf(bio_err,"e is %ld (0x%lX)\n",l,l);
    293 	{
    294 	PW_CB_DATA cb_data;
    295 	cb_data.password = passout;
    296 	cb_data.prompt_info = outfile;
    297 	if (!PEM_write_bio_RSAPrivateKey(out,rsa,enc,NULL,0,
    298 		(pem_password_cb *)password_callback,&cb_data))
    299 		goto err;
    300 	}
    301 
    302 	ret=0;
    303 err:
    304 	if (bn) BN_free(bn);
    305 	if (rsa) RSA_free(rsa);
    306 	if (out) BIO_free_all(out);
    307 	if(passout) OPENSSL_free(passout);
    308 	if (ret != 0)
    309 		ERR_print_errors(bio_err);
    310 	apps_shutdown();
    311 	OPENSSL_EXIT(ret);
    312 	}
    313 
    314 static int MS_CALLBACK genrsa_cb(int p, int n, BN_GENCB *cb)
    315 	{
    316 	char c='*';
    317 
    318 	if (p == 0) c='.';
    319 	if (p == 1) c='+';
    320 	if (p == 2) c='*';
    321 	if (p == 3) c='\n';
    322 	BIO_write(cb->arg,&c,1);
    323 	(void)BIO_flush(cb->arg);
    324 #ifdef LINT
    325 	p=n;
    326 #endif
    327 	return 1;
    328 	}
    329 #else /* !OPENSSL_NO_RSA */
    330 
    331 # if PEDANTIC
    332 static void *dummy=&dummy;
    333 # endif
    334 
    335 #endif
    336