genrsa.c revision 312826 
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 2048
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    ENGINE *e = NULL;
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    char *engine = NULL;
103    char *inrand = NULL;
104    BIO *out = NULL;
105    BIGNUM *bn = BN_new();
106    RSA *rsa = NULL;
107
108    if (!bn)
109        goto err;
110
111    apps_startup();
112    BN_GENCB_set(&cb, genrsa_cb, bio_err);
113
114    if (bio_err == NULL)
115        if ((bio_err = BIO_new(BIO_s_file())) != NULL)
116            BIO_set_fp(bio_err, stderr, BIO_NOCLOSE | BIO_FP_TEXT);
117
118    if (!load_config(bio_err, NULL))
119        goto err;
120    if ((out = BIO_new(BIO_s_file())) == NULL) {
121        BIO_printf(bio_err, "unable to create BIO for output\n");
122        goto err;
123    }
124
125    argv++;
126    argc--;
127    for (;;) {
128        if (argc <= 0)
129            break;
130        if (strcmp(*argv, "-out") == 0) {
131            if (--argc < 1)
132                goto bad;
133            outfile = *(++argv);
134        } else if (strcmp(*argv, "-3") == 0)
135            f4 = 3;
136        else if (strcmp(*argv, "-F4") == 0 || strcmp(*argv, "-f4") == 0)
137            f4 = RSA_F4;
138# ifndef OPENSSL_NO_ENGINE
139        else if (strcmp(*argv, "-engine") == 0) {
140            if (--argc < 1)
141                goto bad;
142            engine = *(++argv);
143        }
144# endif
145        else if (strcmp(*argv, "-rand") == 0) {
146            if (--argc < 1)
147                goto bad;
148            inrand = *(++argv);
149        }
150# ifndef OPENSSL_NO_DES
151        else if (strcmp(*argv, "-des") == 0)
152            enc = EVP_des_cbc();
153        else if (strcmp(*argv, "-des3") == 0)
154            enc = EVP_des_ede3_cbc();
155# endif
156# ifndef OPENSSL_NO_IDEA
157        else if (strcmp(*argv, "-idea") == 0)
158            enc = EVP_idea_cbc();
159# endif
160# ifndef OPENSSL_NO_SEED
161        else if (strcmp(*argv, "-seed") == 0)
162            enc = EVP_seed_cbc();
163# endif
164# ifndef OPENSSL_NO_AES
165        else if (strcmp(*argv, "-aes128") == 0)
166            enc = EVP_aes_128_cbc();
167        else if (strcmp(*argv, "-aes192") == 0)
168            enc = EVP_aes_192_cbc();
169        else if (strcmp(*argv, "-aes256") == 0)
170            enc = EVP_aes_256_cbc();
171# endif
172# ifndef OPENSSL_NO_CAMELLIA
173        else if (strcmp(*argv, "-camellia128") == 0)
174            enc = EVP_camellia_128_cbc();
175        else if (strcmp(*argv, "-camellia192") == 0)
176            enc = EVP_camellia_192_cbc();
177        else if (strcmp(*argv, "-camellia256") == 0)
178            enc = EVP_camellia_256_cbc();
179# endif
180        else if (strcmp(*argv, "-passout") == 0) {
181            if (--argc < 1)
182                goto bad;
183            passargout = *(++argv);
184        } else
185            break;
186        argv++;
187        argc--;
188    }
189    if ((argc >= 1) && ((sscanf(*argv, "%d", &num) == 0) || (num < 0))) {
190 bad:
191        BIO_printf(bio_err, "usage: genrsa [args] [numbits]\n");
192        BIO_printf(bio_err,
193                   " -des            encrypt the generated key with DES in cbc mode\n");
194        BIO_printf(bio_err,
195                   " -des3           encrypt the generated key with DES in ede cbc mode (168 bit key)\n");
196# ifndef OPENSSL_NO_IDEA
197        BIO_printf(bio_err,
198                   " -idea           encrypt the generated key with IDEA in cbc mode\n");
199# endif
200# ifndef OPENSSL_NO_SEED
201        BIO_printf(bio_err, " -seed\n");
202        BIO_printf(bio_err,
203                   "                 encrypt PEM output with cbc seed\n");
204# endif
205# ifndef OPENSSL_NO_AES
206        BIO_printf(bio_err, " -aes128, -aes192, -aes256\n");
207        BIO_printf(bio_err,
208                   "                 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,
213                   "                 encrypt PEM output with cbc camellia\n");
214# endif
215        BIO_printf(bio_err, " -out file       output the key to 'file\n");
216        BIO_printf(bio_err,
217                   " -passout arg    output file pass phrase source\n");
218        BIO_printf(bio_err,
219                   " -f4             use F4 (0x10001) for the E value\n");
220        BIO_printf(bio_err, " -3              use 3 for the E value\n");
221# ifndef OPENSSL_NO_ENGINE
222        BIO_printf(bio_err,
223                   " -engine e       use engine e, possibly a hardware device.\n");
224# endif
225        BIO_printf(bio_err, " -rand file%cfile%c...\n", LIST_SEPARATOR_CHAR,
226                   LIST_SEPARATOR_CHAR);
227        BIO_printf(bio_err,
228                   "                 load the file (or the files in the directory) into\n");
229        BIO_printf(bio_err, "                 the random number generator\n");
230        goto err;
231    }
232
233    ERR_load_crypto_strings();
234
235    if (!app_passwd(bio_err, NULL, passargout, NULL, &passout)) {
236        BIO_printf(bio_err, "Error getting password\n");
237        goto err;
238    }
239    e = setup_engine(bio_err, engine, 0);
240
241    if (outfile == NULL) {
242        BIO_set_fp(out, stdout, BIO_NOCLOSE);
243# ifdef OPENSSL_SYS_VMS
244        {
245            BIO *tmpbio = BIO_new(BIO_f_linebuffer());
246            out = BIO_push(tmpbio, out);
247        }
248# endif
249    } else {
250        if (BIO_write_filename(out, outfile) <= 0) {
251            perror(outfile);
252            goto err;
253        }
254    }
255
256    if (!app_RAND_load_file(NULL, bio_err, 1) && inrand == NULL
257        && !RAND_status()) {
258        BIO_printf(bio_err,
259                   "warning, not much extra random data, consider using the -rand option\n");
260    }
261    if (inrand != NULL)
262        BIO_printf(bio_err, "%ld semi-random bytes loaded\n",
263                   app_RAND_load_files(inrand));
264
265    BIO_printf(bio_err, "Generating RSA private key, %d bit long modulus\n",
266               num);
267# ifdef OPENSSL_NO_ENGINE
268    rsa = RSA_new();
269# else
270    rsa = RSA_new_method(e);
271# endif
272    if (!rsa)
273        goto err;
274
275    if (!BN_set_word(bn, f4) || !RSA_generate_key_ex(rsa, num, bn, &cb))
276        goto err;
277
278    app_RAND_write_file(NULL, bio_err);
279
280    /*
281     * We need to do the following for when the base number size is < long,
282     * esp windows 3.1 :-(.
283     */
284    l = 0L;
285    for (i = 0; i < rsa->e->top; i++) {
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,
299                                         &cb_data))
300            goto err;
301    }
302
303    ret = 0;
304 err:
305    if (bn)
306        BN_free(bn);
307    if (rsa)
308        RSA_free(rsa);
309    if (out)
310        BIO_free_all(out);
311    release_engine(e);
312    if (passout)
313        OPENSSL_free(passout);
314    if (ret != 0)
315        ERR_print_errors(bio_err);
316    apps_shutdown();
317    OPENSSL_EXIT(ret);
318}
319
320static int MS_CALLBACK genrsa_cb(int p, int n, BN_GENCB *cb)
321{
322    char c = '*';
323
324    if (p == 0)
325        c = '.';
326    if (p == 1)
327        c = '+';
328    if (p == 2)
329        c = '*';
330    if (p == 3)
331        c = '\n';
332    BIO_write(cb->arg, &c, 1);
333    (void)BIO_flush(cb->arg);
334# ifdef LINT
335    p = n;
336# endif
337    return 1;
338}
339#else                           /* !OPENSSL_NO_RSA */
340
341# if PEDANTIC
342static void *dummy = &dummy;
343# endif
344
345#endif
346