Annotation of src/usr.bin/openssl/genrsa.c, Revision 1.14
1.14 ! inoguchi 1: /* $OpenBSD: genrsa.c,v 1.13 2019/06/19 01:51:14 inoguchi 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:
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:
! 160: static struct option genrsa_options[] = {
! 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",
! 182: .desc = "Encrypt PEM output with cbc aes",
! 183: .type = OPTION_ARGV_FUNC,
! 184: .opt.argvfunc = set_enc,
! 185: },
! 186: {
! 187: .name = "aes192",
! 188: .desc = "Encrypt PEM output with cbc aes",
! 189: .type = OPTION_ARGV_FUNC,
! 190: .opt.argvfunc = set_enc,
! 191: },
! 192: {
! 193: .name = "aes256",
! 194: .desc = "Encrypt PEM output with cbc aes",
! 195: .type = OPTION_ARGV_FUNC,
! 196: .opt.argvfunc = set_enc,
! 197: },
! 198: #endif
! 199: #ifndef OPENSSL_NO_CAMELLIA
! 200: {
! 201: .name = "camellia128",
! 202: .desc = "Encrypt PEM output with cbc camellia",
! 203: .type = OPTION_ARGV_FUNC,
! 204: .opt.argvfunc = set_enc,
! 205: },
! 206: {
! 207: .name = "camellia192",
! 208: .desc = "Encrypt PEM output with cbc camellia",
! 209: .type = OPTION_ARGV_FUNC,
! 210: .opt.argvfunc = set_enc,
! 211: },
! 212: {
! 213: .name = "camellia256",
! 214: .desc = "Encrypt PEM output with cbc camellia",
! 215: .type = OPTION_ARGV_FUNC,
! 216: .opt.argvfunc = set_enc,
! 217: },
! 218: #endif
! 219: #ifndef OPENSSL_NO_DES
! 220: {
! 221: .name = "des",
! 222: .desc = "Encrypt the generated key with DES in cbc mode",
! 223: .type = OPTION_ARGV_FUNC,
! 224: .opt.argvfunc = set_enc,
! 225: },
! 226: {
! 227: .name = "des3",
! 228: .desc = "Encrypt the generated key with DES in ede cbc mode (168 bit key)",
! 229: .type = OPTION_ARGV_FUNC,
! 230: .opt.argvfunc = set_enc,
! 231: },
! 232: #endif
! 233: #ifndef OPENSSL_NO_IDEA
! 234: {
! 235: .name = "idea",
! 236: .desc = "Encrypt the generated key with IDEA in cbc mode",
! 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: {
273: BN_GENCB cb;
274: int ret = 1;
275: int i, num = DEFBITS;
1.14 ! inoguchi 276: char *numbits= NULL;
1.1 jsing 277: long l;
1.13 inoguchi 278: char *passout = NULL;
1.1 jsing 279: BIO *out = NULL;
280: BIGNUM *bn = BN_new();
281: RSA *rsa = NULL;
1.6 doug 282:
283: if (single_execution) {
1.9 deraadt 284: if (pledge("stdio cpath wpath rpath tty", NULL) == -1) {
1.6 doug 285: perror("pledge");
1.8 doug 286: exit(1);
287: }
1.6 doug 288: }
1.1 jsing 289:
290: if (!bn)
291: goto err;
292:
293: BN_GENCB_set(&cb, genrsa_cb, bio_err);
294:
295: if ((out = BIO_new(BIO_s_file())) == NULL) {
296: BIO_printf(bio_err, "unable to create BIO for output\n");
297: goto err;
298: }
1.13 inoguchi 299:
300: memset(&genrsa_config, 0, sizeof(genrsa_config));
301: genrsa_config.f4 = RSA_F4;
302:
1.14 ! inoguchi 303: if (options_parse(argc, argv, genrsa_options, &numbits, NULL) != 0) {
! 304: genrsa_usage();
! 305: goto err;
1.1 jsing 306: }
1.14 ! inoguchi 307:
! 308: if ((numbits != NULL) && ((sscanf(numbits, "%d", &num) == 0) || (num < 0))) {
! 309: genrsa_usage();
1.1 jsing 310: goto err;
311: }
312:
1.13 inoguchi 313: if (!app_passwd(bio_err, NULL, genrsa_config.passargout, NULL, &passout)) {
1.1 jsing 314: BIO_printf(bio_err, "Error getting password\n");
315: goto err;
316: }
317:
1.13 inoguchi 318: if (genrsa_config.outfile == NULL) {
1.1 jsing 319: BIO_set_fp(out, stdout, BIO_NOCLOSE);
320: } else {
1.13 inoguchi 321: if (BIO_write_filename(out, genrsa_config.outfile) <= 0) {
322: perror(genrsa_config.outfile);
1.1 jsing 323: goto err;
324: }
325: }
326:
327: BIO_printf(bio_err, "Generating RSA private key, %d bit long modulus\n",
328: num);
329: rsa = RSA_new();
330: if (!rsa)
331: goto err;
332:
1.13 inoguchi 333: if (!BN_set_word(bn, genrsa_config.f4) || !RSA_generate_key_ex(rsa, num, bn, &cb))
1.1 jsing 334: goto err;
335:
336: /*
337: * We need to do the following for when the base number size is <
338: * long, esp windows 3.1 :-(.
339: */
340: l = 0L;
341: for (i = 0; i < rsa->e->top; i++) {
342: #ifndef _LP64
343: l <<= BN_BITS4;
344: l <<= BN_BITS4;
345: #endif
346: l += rsa->e->d[i];
347: }
348: BIO_printf(bio_err, "e is %ld (0x%lX)\n", l, l);
349: {
350: PW_CB_DATA cb_data;
351: cb_data.password = passout;
1.13 inoguchi 352: cb_data.prompt_info = genrsa_config.outfile;
353: if (!PEM_write_bio_RSAPrivateKey(out, rsa, genrsa_config.enc, NULL, 0,
1.1 jsing 354: password_callback, &cb_data))
355: goto err;
356: }
357:
358: ret = 0;
1.11 jsing 359: err:
1.10 jsing 360: BN_free(bn);
361: RSA_free(rsa);
362: BIO_free_all(out);
1.1 jsing 363: free(passout);
1.10 jsing 364:
1.1 jsing 365: if (ret != 0)
366: ERR_print_errors(bio_err);
367:
368: return (ret);
369: }
370:
371: static int
372: genrsa_cb(int p, int n, BN_GENCB * cb)
373: {
374: char c = '*';
375:
376: if (p == 0)
377: c = '.';
378: if (p == 1)
379: c = '+';
380: if (p == 2)
381: c = '*';
382: if (p == 3)
383: c = '\n';
384: BIO_write(cb->arg, &c, 1);
385: (void) BIO_flush(cb->arg);
386: return 1;
387: }
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