Annotation of src/usr.bin/openssl/genrsa.c, Revision 1.4
1.4 ! jsing 1: /* $OpenBSD: genrsa.c,v 1.3 2014/10/22 13:51:31 jsing Exp $ */
1.1 jsing 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: #ifdef OPENSSL_NO_DEPRECATED
64: #undef OPENSSL_NO_DEPRECATED
65: #endif
66:
67:
68: #include <sys/types.h>
69: #include <sys/stat.h>
70:
71: #include <stdio.h>
72: #include <string.h>
73:
74: #include "apps.h"
75:
76: #include <openssl/bio.h>
77: #include <openssl/bn.h>
78: #include <openssl/err.h>
79: #include <openssl/evp.h>
80: #include <openssl/pem.h>
81: #include <openssl/rsa.h>
82: #include <openssl/x509.h>
83:
84: #define DEFBITS 2048
85:
86: static int genrsa_cb(int p, int n, BN_GENCB * cb);
87:
88: int
89: genrsa_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: BIO *out = NULL;
106: BIGNUM *bn = BN_new();
107: RSA *rsa = NULL;
108:
109: if (!bn)
110: goto err;
111:
112: BN_GENCB_set(&cb, genrsa_cb, bio_err);
113:
114: if ((out = BIO_new(BIO_s_file())) == NULL) {
115: BIO_printf(bio_err, "unable to create BIO for output\n");
116: goto err;
117: }
118: argv++;
119: argc--;
120: for (;;) {
121: if (argc <= 0)
122: break;
123: if (strcmp(*argv, "-out") == 0) {
124: if (--argc < 1)
125: goto bad;
126: outfile = *(++argv);
127: } else if (strcmp(*argv, "-3") == 0)
128: f4 = 3;
129: else if (strcmp(*argv, "-F4") == 0 || strcmp(*argv, "-f4") == 0)
130: f4 = RSA_F4;
131: #ifndef OPENSSL_NO_ENGINE
132: else if (strcmp(*argv, "-engine") == 0) {
133: if (--argc < 1)
134: goto bad;
135: engine = *(++argv);
136: }
137: #endif
138: #ifndef OPENSSL_NO_DES
139: else if (strcmp(*argv, "-des") == 0)
140: enc = EVP_des_cbc();
141: else if (strcmp(*argv, "-des3") == 0)
142: enc = EVP_des_ede3_cbc();
143: #endif
144: #ifndef OPENSSL_NO_IDEA
145: else if (strcmp(*argv, "-idea") == 0)
146: enc = EVP_idea_cbc();
147: #endif
148: #ifndef OPENSSL_NO_AES
149: else if (strcmp(*argv, "-aes128") == 0)
150: enc = EVP_aes_128_cbc();
151: else if (strcmp(*argv, "-aes192") == 0)
152: enc = EVP_aes_192_cbc();
153: else if (strcmp(*argv, "-aes256") == 0)
154: enc = EVP_aes_256_cbc();
155: #endif
156: #ifndef OPENSSL_NO_CAMELLIA
157: else if (strcmp(*argv, "-camellia128") == 0)
158: enc = EVP_camellia_128_cbc();
159: else if (strcmp(*argv, "-camellia192") == 0)
160: enc = EVP_camellia_192_cbc();
161: else if (strcmp(*argv, "-camellia256") == 0)
162: enc = EVP_camellia_256_cbc();
163: #endif
164: else if (strcmp(*argv, "-passout") == 0) {
165: if (--argc < 1)
166: goto bad;
167: passargout = *(++argv);
168: } else
169: break;
170: argv++;
171: argc--;
172: }
173: if ((argc >= 1) && ((sscanf(*argv, "%d", &num) == 0) || (num < 0))) {
174: bad:
175: BIO_printf(bio_err, "usage: genrsa [args] [numbits]\n");
176: BIO_printf(bio_err, " -des encrypt the generated key with DES in cbc mode\n");
177: BIO_printf(bio_err, " -des3 encrypt the generated key with DES in ede cbc mode (168 bit key)\n");
178: #ifndef OPENSSL_NO_IDEA
179: BIO_printf(bio_err, " -idea encrypt the generated key with IDEA in cbc mode\n");
180: #endif
181: #ifndef OPENSSL_NO_AES
182: BIO_printf(bio_err, " -aes128, -aes192, -aes256\n");
183: BIO_printf(bio_err, " encrypt PEM output with cbc aes\n");
184: #endif
185: #ifndef OPENSSL_NO_CAMELLIA
186: BIO_printf(bio_err, " -camellia128, -camellia192, -camellia256\n");
187: BIO_printf(bio_err, " encrypt PEM output with cbc camellia\n");
188: #endif
189: BIO_printf(bio_err, " -out file output the key to 'file\n");
190: BIO_printf(bio_err, " -passout arg output file pass phrase source\n");
191: BIO_printf(bio_err, " -f4 use F4 (0x10001) for the E value\n");
192: BIO_printf(bio_err, " -3 use 3 for the E value\n");
193: #ifndef OPENSSL_NO_ENGINE
194: BIO_printf(bio_err, " -engine e use engine e, possibly a hardware device.\n");
195: #endif
196: goto err;
197: }
198:
199: if (!app_passwd(bio_err, NULL, passargout, NULL, &passout)) {
200: BIO_printf(bio_err, "Error getting password\n");
201: goto err;
202: }
203: #ifndef OPENSSL_NO_ENGINE
204: e = setup_engine(bio_err, engine, 0);
205: #endif
206:
207: if (outfile == NULL) {
208: BIO_set_fp(out, stdout, BIO_NOCLOSE);
209: } else {
210: if (BIO_write_filename(out, outfile) <= 0) {
211: perror(outfile);
212: goto err;
213: }
214: }
215:
216: BIO_printf(bio_err, "Generating RSA private key, %d bit long modulus\n",
217: num);
218: #ifdef OPENSSL_NO_ENGINE
219: rsa = RSA_new();
220: #else
221: rsa = RSA_new_method(e);
222: #endif
223: if (!rsa)
224: goto err;
225:
226: if (!BN_set_word(bn, f4) || !RSA_generate_key_ex(rsa, num, bn, &cb))
227: goto err;
228:
229: /*
230: * We need to do the following for when the base number size is <
231: * long, esp windows 3.1 :-(.
232: */
233: l = 0L;
234: for (i = 0; i < rsa->e->top; i++) {
235: #ifndef _LP64
236: l <<= BN_BITS4;
237: l <<= BN_BITS4;
238: #endif
239: l += rsa->e->d[i];
240: }
241: BIO_printf(bio_err, "e is %ld (0x%lX)\n", l, l);
242: {
243: PW_CB_DATA cb_data;
244: cb_data.password = passout;
245: cb_data.prompt_info = outfile;
246: if (!PEM_write_bio_RSAPrivateKey(out, rsa, enc, NULL, 0,
247: password_callback, &cb_data))
248: goto err;
249: }
250:
251: ret = 0;
252: err:
253: if (bn)
254: BN_free(bn);
255: if (rsa)
256: RSA_free(rsa);
257: if (out)
258: BIO_free_all(out);
259: free(passout);
260: if (ret != 0)
261: ERR_print_errors(bio_err);
262:
263: return (ret);
264: }
265:
266: static int
267: genrsa_cb(int p, int n, BN_GENCB * cb)
268: {
269: char c = '*';
270:
271: if (p == 0)
272: c = '.';
273: if (p == 1)
274: c = '+';
275: if (p == 2)
276: c = '*';
277: if (p == 3)
278: c = '\n';
279: BIO_write(cb->arg, &c, 1);
280: (void) BIO_flush(cb->arg);
281: return 1;
282: }
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