Annotation of src/usr.bin/openssl/genrsa.c, Revision 1.21
1.21 ! joshua 1: /* $OpenBSD: genrsa.c,v 1.20 2022/10/04 15:31:02 espie 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:
1.18 tb 86: static int genrsa_cb(int p, int n, BN_GENCB *cb);
1.1 jsing 87:
1.13 inoguchi 88: static struct {
89: const EVP_CIPHER *enc;
90: unsigned long f4;
91: char *outfile;
92: char *passargout;
93: } genrsa_config;
94:
1.14 inoguchi 95: static int
96: set_public_exponent(int argc, char **argv, int *argsused)
97: {
98: char *option = argv[0];
99:
100: if (strcmp(option, "-3") == 0)
101: genrsa_config.f4 = 3;
102: else if (strcmp(option, "-f4") == 0 || strcmp(option, "-F4") == 0)
103: genrsa_config.f4 = RSA_F4;
104: else
105: return (1);
106:
107: *argsused = 1;
108: return (0);
109: }
110:
111: static const EVP_CIPHER *get_cipher_by_name(char *name)
112: {
113: if (name == NULL || strcmp(name, "") == 0)
114: return (NULL);
115: #ifndef OPENSSL_NO_AES
116: else if (strcmp(name, "aes128") == 0)
117: return EVP_aes_128_cbc();
118: else if (strcmp(name, "aes192") == 0)
119: return EVP_aes_192_cbc();
120: else if (strcmp(name, "aes256") == 0)
121: return EVP_aes_256_cbc();
122: #endif
123: #ifndef OPENSSL_NO_CAMELLIA
124: else if (strcmp(name, "camellia128") == 0)
125: return EVP_camellia_128_cbc();
126: else if (strcmp(name, "camellia192") == 0)
127: return EVP_camellia_192_cbc();
128: else if (strcmp(name, "camellia256") == 0)
129: return EVP_camellia_256_cbc();
130: #endif
131: #ifndef OPENSSL_NO_DES
132: else if (strcmp(name, "des") == 0)
133: return EVP_des_cbc();
134: else if (strcmp(name, "des3") == 0)
135: return EVP_des_ede3_cbc();
136: #endif
137: #ifndef OPENSSL_NO_IDEA
138: else if (strcmp(name, "idea") == 0)
139: return EVP_idea_cbc();
140: #endif
141: else
142: return (NULL);
143: }
144:
145: static int
146: set_enc(int argc, char **argv, int *argsused)
147: {
148: char *name = argv[0];
149:
150: if (*name++ != '-')
151: return (1);
152:
153: if ((genrsa_config.enc = get_cipher_by_name(name)) == NULL)
154: return (1);
155:
156: *argsused = 1;
157: return (0);
158: }
159:
1.15 guenther 160: static const struct option genrsa_options[] = {
1.14 inoguchi 161: {
162: .name = "3",
163: .desc = "Use 3 for the E value",
164: .type = OPTION_ARGV_FUNC,
165: .opt.argvfunc = set_public_exponent,
166: },
167: {
168: .name = "f4",
169: .desc = "Use F4 (0x10001) for the E value",
170: .type = OPTION_ARGV_FUNC,
171: .opt.argvfunc = set_public_exponent,
172: },
173: {
174: .name = "F4",
175: .desc = "Use F4 (0x10001) for the E value",
176: .type = OPTION_ARGV_FUNC,
177: .opt.argvfunc = set_public_exponent,
178: },
179: #ifndef OPENSSL_NO_AES
180: {
181: .name = "aes128",
1.17 inoguchi 182: .desc = "Encrypt PEM output with CBC AES",
1.14 inoguchi 183: .type = OPTION_ARGV_FUNC,
184: .opt.argvfunc = set_enc,
185: },
186: {
187: .name = "aes192",
1.17 inoguchi 188: .desc = "Encrypt PEM output with CBC AES",
1.14 inoguchi 189: .type = OPTION_ARGV_FUNC,
190: .opt.argvfunc = set_enc,
191: },
192: {
193: .name = "aes256",
1.17 inoguchi 194: .desc = "Encrypt PEM output with CBC AES",
1.14 inoguchi 195: .type = OPTION_ARGV_FUNC,
196: .opt.argvfunc = set_enc,
197: },
198: #endif
199: #ifndef OPENSSL_NO_CAMELLIA
200: {
201: .name = "camellia128",
1.17 inoguchi 202: .desc = "Encrypt PEM output with CBC Camellia",
1.14 inoguchi 203: .type = OPTION_ARGV_FUNC,
204: .opt.argvfunc = set_enc,
205: },
206: {
207: .name = "camellia192",
1.17 inoguchi 208: .desc = "Encrypt PEM output with CBC Camellia",
1.14 inoguchi 209: .type = OPTION_ARGV_FUNC,
210: .opt.argvfunc = set_enc,
211: },
212: {
213: .name = "camellia256",
1.17 inoguchi 214: .desc = "Encrypt PEM output with CBC Camellia",
1.14 inoguchi 215: .type = OPTION_ARGV_FUNC,
216: .opt.argvfunc = set_enc,
217: },
218: #endif
219: #ifndef OPENSSL_NO_DES
220: {
221: .name = "des",
1.17 inoguchi 222: .desc = "Encrypt the generated key with DES in CBC mode",
1.14 inoguchi 223: .type = OPTION_ARGV_FUNC,
224: .opt.argvfunc = set_enc,
225: },
226: {
227: .name = "des3",
1.17 inoguchi 228: .desc = "Encrypt the generated key with DES in EDE CBC mode (168 bit key)",
1.14 inoguchi 229: .type = OPTION_ARGV_FUNC,
230: .opt.argvfunc = set_enc,
231: },
232: #endif
233: #ifndef OPENSSL_NO_IDEA
234: {
235: .name = "idea",
1.17 inoguchi 236: .desc = "Encrypt the generated key with IDEA in CBC mode",
1.14 inoguchi 237: .type = OPTION_ARGV_FUNC,
238: .opt.argvfunc = set_enc,
239: },
240: #endif
241: {
242: .name = "out",
243: .argname = "file",
244: .desc = "Output the key to 'file'",
245: .type = OPTION_ARG,
246: .opt.arg = &genrsa_config.outfile,
247: },
248: {
249: .name = "passout",
250: .argname = "arg",
251: .desc = "Output file passphrase source",
252: .type = OPTION_ARG,
253: .opt.arg = &genrsa_config.passargout,
254: },
255: { NULL },
256: };
257:
258: static void
259: genrsa_usage(void)
260: {
261: fprintf(stderr, "usage: genrsa [-3 | -f4] [-aes128 | -aes192 |");
262: fprintf(stderr, " -aes256 |\n");
263: fprintf(stderr, " -camellia128 | -camellia192 | -camellia256 |");
264: fprintf(stderr, " -des | -des3 | -idea]\n");
265: fprintf(stderr, " [-out file] [-passout arg] [numbits]\n\n");
266: options_usage(genrsa_options);
267: fprintf(stderr, "\n");
268: }
269:
1.1 jsing 270: int
271: genrsa_main(int argc, char **argv)
272: {
1.18 tb 273: BN_GENCB *cb = NULL;
1.1 jsing 274: int ret = 1;
1.18 tb 275: int num = DEFBITS;
276: char *numbits = NULL;
1.13 inoguchi 277: char *passout = NULL;
1.1 jsing 278: BIO *out = NULL;
1.18 tb 279: BIGNUM *bn = NULL;
1.1 jsing 280: RSA *rsa = NULL;
1.18 tb 281: char *rsa_e_hex = NULL, *rsa_e_dec = NULL;
1.6 doug 282:
1.21 ! joshua 283: if (pledge("stdio cpath wpath rpath tty", NULL) == -1) {
! 284: perror("pledge");
! 285: exit(1);
1.6 doug 286: }
1.1 jsing 287:
1.18 tb 288: if ((bn = BN_new()) == NULL)
1.1 jsing 289: goto err;
290:
1.18 tb 291: if ((cb = BN_GENCB_new()) == NULL) {
292: BIO_printf(bio_err, "Error allocating BN_GENCB object\n");
293: goto err;
294: }
295:
296: BN_GENCB_set(cb, genrsa_cb, bio_err);
1.1 jsing 297:
298: if ((out = BIO_new(BIO_s_file())) == NULL) {
299: BIO_printf(bio_err, "unable to create BIO for output\n");
300: goto err;
301: }
1.13 inoguchi 302:
303: memset(&genrsa_config, 0, sizeof(genrsa_config));
304: genrsa_config.f4 = RSA_F4;
305:
1.14 inoguchi 306: if (options_parse(argc, argv, genrsa_options, &numbits, NULL) != 0) {
307: genrsa_usage();
308: goto err;
1.1 jsing 309: }
1.14 inoguchi 310:
1.16 inoguchi 311: if ((numbits != NULL) &&
312: ((sscanf(numbits, "%d", &num) == 0) || (num < 0))) {
1.14 inoguchi 313: genrsa_usage();
1.1 jsing 314: goto err;
315: }
316:
1.16 inoguchi 317: if (!app_passwd(bio_err, NULL, genrsa_config.passargout, NULL,
318: &passout)) {
1.1 jsing 319: BIO_printf(bio_err, "Error getting password\n");
320: goto err;
321: }
322:
1.13 inoguchi 323: if (genrsa_config.outfile == NULL) {
1.1 jsing 324: BIO_set_fp(out, stdout, BIO_NOCLOSE);
325: } else {
1.13 inoguchi 326: if (BIO_write_filename(out, genrsa_config.outfile) <= 0) {
327: perror(genrsa_config.outfile);
1.1 jsing 328: goto err;
329: }
330: }
331:
332: BIO_printf(bio_err, "Generating RSA private key, %d bit long modulus\n",
333: num);
334: rsa = RSA_new();
335: if (!rsa)
336: goto err;
337:
1.16 inoguchi 338: if (!BN_set_word(bn, genrsa_config.f4) ||
1.18 tb 339: !RSA_generate_key_ex(rsa, num, bn, cb))
340: goto err;
341:
1.19 tb 342: if ((rsa_e_hex = BN_bn2hex(RSA_get0_e(rsa))) == NULL)
1.18 tb 343: goto err;
1.19 tb 344: if ((rsa_e_dec = BN_bn2dec(RSA_get0_e(rsa))) == NULL)
1.1 jsing 345: goto err;
346:
1.20 espie 347: BIO_printf(bio_err, "e is %s (0x%s)\n", rsa_e_dec, rsa_e_hex);
1.1 jsing 348: {
349: PW_CB_DATA cb_data;
350: cb_data.password = passout;
1.13 inoguchi 351: cb_data.prompt_info = genrsa_config.outfile;
1.16 inoguchi 352: if (!PEM_write_bio_RSAPrivateKey(out, rsa, genrsa_config.enc,
353: NULL, 0, password_callback, &cb_data))
1.1 jsing 354: goto err;
355: }
356:
357: ret = 0;
1.11 jsing 358: err:
1.10 jsing 359: BN_free(bn);
1.18 tb 360: BN_GENCB_free(cb);
1.10 jsing 361: RSA_free(rsa);
362: BIO_free_all(out);
1.18 tb 363: free(rsa_e_dec);
364: free(rsa_e_hex);
1.1 jsing 365: free(passout);
1.10 jsing 366:
1.1 jsing 367: if (ret != 0)
368: ERR_print_errors(bio_err);
369:
370: return (ret);
371: }
372:
373: static int
1.18 tb 374: genrsa_cb(int p, int n, BN_GENCB *cb)
1.1 jsing 375: {
376: char c = '*';
377:
378: if (p == 0)
379: c = '.';
380: if (p == 1)
381: c = '+';
382: if (p == 2)
383: c = '*';
384: if (p == 3)
385: c = '\n';
1.18 tb 386: BIO_write(BN_GENCB_get_arg(cb), &c, 1);
387: (void) BIO_flush(BN_GENCB_get_arg(cb));
1.1 jsing 388: return 1;
389: }
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