genrsa.c revision 296465 
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#include <openssl/opensslconf.h>
60/*
61 * Until the key-gen callbacks are modified to use newer prototypes, we allow
62 * deprecated functions for openssl-internal code
63 */
64#ifdef OPENSSL_NO_DEPRECATED
65# undef OPENSSL_NO_DEPRECATED
66#endif
67
68#ifndef OPENSSL_NO_RSA
69# include <stdio.h>
70# include <string.h>
71# include <sys/types.h>
72# include <sys/stat.h>
73# include "apps.h"
74# include <openssl/bio.h>
75# include <openssl/err.h>
76# include <openssl/bn.h>
77# include <openssl/rsa.h>
78# include <openssl/evp.h>
79# include <openssl/x509.h>
80# include <openssl/pem.h>
81# include <openssl/rand.h>
82
83# define DEFBITS 512
84# undef PROG
85# define PROG genrsa_main
86
87static int MS_CALLBACK genrsa_cb(int p, int n, BN_GENCB *cb);
88
89int MAIN(int, char **);
90
91int MAIN(int argc, char **argv)
92{
93    BN_GENCB cb;
94    int ret = 1;
95    int i, num = DEFBITS;
96    long l;
97    int use_x931 = 0;
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)
111        goto err;
112
113    apps_startup();
114    BN_GENCB_set(&cb, genrsa_cb, bio_err);
115
116    if (bio_err == NULL)
117        if ((bio_err = BIO_new(BIO_s_file())) != NULL)
118            BIO_set_fp(bio_err, stderr, BIO_NOCLOSE | BIO_FP_TEXT);
119
120    if (!load_config(bio_err, NULL))
121        goto err;
122    if ((out = BIO_new(BIO_s_file())) == NULL) {
123        BIO_printf(bio_err, "unable to create BIO for output\n");
124        goto err;
125    }
126
127    argv++;
128    argc--;
129    for (;;) {
130        if (argc <= 0)
131            break;
132        if (strcmp(*argv, "-out") == 0) {
133            if (--argc < 1)
134                goto bad;
135            outfile = *(++argv);
136        } else if (strcmp(*argv, "-3") == 0)
137            f4 = 3;
138        else if (strcmp(*argv, "-F4") == 0 || strcmp(*argv, "-f4") == 0)
139            f4 = RSA_F4;
140        else if (strcmp(*argv, "-x931") == 0)
141            use_x931 = 1;
142# ifndef OPENSSL_NO_ENGINE
143        else if (strcmp(*argv, "-engine") == 0) {
144            if (--argc < 1)
145                goto bad;
146            engine = *(++argv);
147        }
148# endif
149        else if (strcmp(*argv, "-rand") == 0) {
150            if (--argc < 1)
151                goto bad;
152            inrand = *(++argv);
153        }
154# ifndef OPENSSL_NO_DES
155        else if (strcmp(*argv, "-des") == 0)
156            enc = EVP_des_cbc();
157        else if (strcmp(*argv, "-des3") == 0)
158            enc = EVP_des_ede3_cbc();
159# endif
160# ifndef OPENSSL_NO_IDEA
161        else if (strcmp(*argv, "-idea") == 0)
162            enc = EVP_idea_cbc();
163# endif
164# ifndef OPENSSL_NO_SEED
165        else if (strcmp(*argv, "-seed") == 0)
166            enc = EVP_seed_cbc();
167# endif
168# ifndef OPENSSL_NO_AES
169        else if (strcmp(*argv, "-aes128") == 0)
170            enc = EVP_aes_128_cbc();
171        else if (strcmp(*argv, "-aes192") == 0)
172            enc = EVP_aes_192_cbc();
173        else if (strcmp(*argv, "-aes256") == 0)
174            enc = EVP_aes_256_cbc();
175# endif
176# ifndef OPENSSL_NO_CAMELLIA
177        else if (strcmp(*argv, "-camellia128") == 0)
178            enc = EVP_camellia_128_cbc();
179        else if (strcmp(*argv, "-camellia192") == 0)
180            enc = EVP_camellia_192_cbc();
181        else if (strcmp(*argv, "-camellia256") == 0)
182            enc = EVP_camellia_256_cbc();
183# endif
184        else if (strcmp(*argv, "-passout") == 0) {
185            if (--argc < 1)
186                goto bad;
187            passargout = *(++argv);
188        } else
189            break;
190        argv++;
191        argc--;
192    }
193    if ((argc >= 1) && ((sscanf(*argv, "%d", &num) == 0) || (num < 0))) {
194 bad:
195        BIO_printf(bio_err, "usage: genrsa [args] [numbits]\n");
196        BIO_printf(bio_err,
197                   " -des            encrypt the generated key with DES in cbc mode\n");
198        BIO_printf(bio_err,
199                   " -des3           encrypt the generated key with DES in ede cbc mode (168 bit key)\n");
200# ifndef OPENSSL_NO_IDEA
201        BIO_printf(bio_err,
202                   " -idea           encrypt the generated key with IDEA in cbc mode\n");
203# endif
204# ifndef OPENSSL_NO_SEED
205        BIO_printf(bio_err, " -seed\n");
206        BIO_printf(bio_err,
207                   "                 encrypt PEM output with cbc seed\n");
208# endif
209# ifndef OPENSSL_NO_AES
210        BIO_printf(bio_err, " -aes128, -aes192, -aes256\n");
211        BIO_printf(bio_err,
212                   "                 encrypt PEM output with cbc aes\n");
213# endif
214# ifndef OPENSSL_NO_CAMELLIA
215        BIO_printf(bio_err, " -camellia128, -camellia192, -camellia256\n");
216        BIO_printf(bio_err,
217                   "                 encrypt PEM output with cbc camellia\n");
218# endif
219        BIO_printf(bio_err, " -out file       output the key to 'file\n");
220        BIO_printf(bio_err,
221                   " -passout arg    output file pass phrase source\n");
222        BIO_printf(bio_err,
223                   " -f4             use F4 (0x10001) for the E value\n");
224        BIO_printf(bio_err, " -3              use 3 for the E value\n");
225# ifndef OPENSSL_NO_ENGINE
226        BIO_printf(bio_err,
227                   " -engine e       use engine e, possibly a hardware device.\n");
228# endif
229        BIO_printf(bio_err, " -rand file%cfile%c...\n", LIST_SEPARATOR_CHAR,
230                   LIST_SEPARATOR_CHAR);
231        BIO_printf(bio_err,
232                   "                 load the file (or the files in the directory) into\n");
233        BIO_printf(bio_err, "                 the random number generator\n");
234        goto err;
235    }
236
237    ERR_load_crypto_strings();
238
239    if (!app_passwd(bio_err, NULL, passargout, NULL, &passout)) {
240        BIO_printf(bio_err, "Error getting password\n");
241        goto err;
242    }
243# ifndef OPENSSL_NO_ENGINE
244    setup_engine(bio_err, engine, 0);
245# endif
246
247    if (outfile == NULL) {
248        BIO_set_fp(out, stdout, BIO_NOCLOSE);
249# ifdef OPENSSL_SYS_VMS
250        {
251            BIO *tmpbio = BIO_new(BIO_f_linebuffer());
252            out = BIO_push(tmpbio, out);
253        }
254# endif
255    } else {
256        if (BIO_write_filename(out, outfile) <= 0) {
257            perror(outfile);
258            goto err;
259        }
260    }
261
262    if (!app_RAND_load_file(NULL, bio_err, 1) && inrand == NULL
263        && !RAND_status()) {
264        BIO_printf(bio_err,
265                   "warning, not much extra random data, consider using the -rand option\n");
266    }
267    if (inrand != NULL)
268        BIO_printf(bio_err, "%ld semi-random bytes loaded\n",
269                   app_RAND_load_files(inrand));
270
271    BIO_printf(bio_err, "Generating RSA private key, %d bit long modulus\n",
272               num);
273
274    rsa = RSA_new();
275    if (!rsa)
276        goto err;
277
278    if (use_x931) {
279        BIGNUM *pubexp;
280        pubexp = BN_new();
281        if (!BN_set_word(pubexp, f4))
282            goto err;
283        if (!RSA_X931_generate_key_ex(rsa, num, pubexp, &cb))
284            goto err;
285        BN_free(pubexp);
286    } else if (!BN_set_word(bn, f4)
287               || !RSA_generate_key_ex(rsa, num, bn, &cb))
288        goto err;
289
290    app_RAND_write_file(NULL, bio_err);
291
292    /*
293     * We need to do the following for when the base number size is < long,
294     * esp windows 3.1 :-(.
295     */
296    l = 0L;
297    for (i = 0; i < rsa->e->top; i++) {
298# ifndef SIXTY_FOUR_BIT
299        l <<= BN_BITS4;
300        l <<= BN_BITS4;
301# endif
302        l += rsa->e->d[i];
303    }
304    BIO_printf(bio_err, "e is %ld (0x%lX)\n", l, l);
305    {
306        PW_CB_DATA cb_data;
307        cb_data.password = passout;
308        cb_data.prompt_info = outfile;
309        if (!PEM_write_bio_RSAPrivateKey(out, rsa, enc, NULL, 0,
310                                         (pem_password_cb *)password_callback,
311                                         &cb_data))
312            goto err;
313    }
314
315    ret = 0;
316 err:
317    if (bn)
318        BN_free(bn);
319    if (rsa)
320        RSA_free(rsa);
321    if (out)
322        BIO_free_all(out);
323    if (passout)
324        OPENSSL_free(passout);
325    if (ret != 0)
326        ERR_print_errors(bio_err);
327    apps_shutdown();
328    OPENSSL_EXIT(ret);
329}
330
331static int MS_CALLBACK genrsa_cb(int p, int n, BN_GENCB *cb)
332{
333    char c = '*';
334
335    if (p == 0)
336        c = '.';
337    if (p == 1)
338        c = '+';
339    if (p == 2)
340        c = '*';
341    if (p == 3)
342        c = '\n';
343    BIO_write(cb->arg, &c, 1);
344    (void)BIO_flush(cb->arg);
345# ifdef LINT
346    p = n;
347# endif
348    return 1;
349}
350#else                           /* !OPENSSL_NO_RSA */
351
352# if PEDANTIC
353static void *dummy = &dummy;
354# endif
355
356#endif
357