1 /* $OpenBSD: genrsa.c,v 1.13 2019/06/19 01:51:14 inoguchi Exp $ */ 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 static struct { 89 const EVP_CIPHER *enc; 90 unsigned long f4; 91 char *outfile; 92 char *passargout; 93 } genrsa_config; 94 95 int 96 genrsa_main(int argc, char **argv) 97 { 98 BN_GENCB cb; 99 int ret = 1; 100 int i, num = DEFBITS; 101 long l; 102 char *passout = NULL; 103 BIO *out = NULL; 104 BIGNUM *bn = BN_new(); 105 RSA *rsa = NULL; 106 107 if (single_execution) { 108 if (pledge("stdio cpath wpath rpath tty", NULL) == -1) { 109 perror("pledge"); 110 exit(1); 111 } 112 } 113 114 if (!bn) 115 goto err; 116 117 BN_GENCB_set(&cb, genrsa_cb, bio_err); 118 119 if ((out = BIO_new(BIO_s_file())) == NULL) { 120 BIO_printf(bio_err, "unable to create BIO for output\n"); 121 goto err; 122 } 123 124 memset(&genrsa_config, 0, sizeof(genrsa_config)); 125 genrsa_config.f4 = RSA_F4; 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 genrsa_config.outfile = *(++argv); 136 } else if (strcmp(*argv, "-3") == 0) 137 genrsa_config.f4 = 3; 138 else if (strcmp(*argv, "-F4") == 0 || strcmp(*argv, "-f4") == 0) 139 genrsa_config.f4 = RSA_F4; 140 #ifndef OPENSSL_NO_DES 141 else if (strcmp(*argv, "-des") == 0) 142 genrsa_config.enc = EVP_des_cbc(); 143 else if (strcmp(*argv, "-des3") == 0) 144 genrsa_config.enc = EVP_des_ede3_cbc(); 145 #endif 146 #ifndef OPENSSL_NO_IDEA 147 else if (strcmp(*argv, "-idea") == 0) 148 genrsa_config.enc = EVP_idea_cbc(); 149 #endif 150 #ifndef OPENSSL_NO_AES 151 else if (strcmp(*argv, "-aes128") == 0) 152 genrsa_config.enc = EVP_aes_128_cbc(); 153 else if (strcmp(*argv, "-aes192") == 0) 154 genrsa_config.enc = EVP_aes_192_cbc(); 155 else if (strcmp(*argv, "-aes256") == 0) 156 genrsa_config.enc = EVP_aes_256_cbc(); 157 #endif 158 #ifndef OPENSSL_NO_CAMELLIA 159 else if (strcmp(*argv, "-camellia128") == 0) 160 genrsa_config.enc = EVP_camellia_128_cbc(); 161 else if (strcmp(*argv, "-camellia192") == 0) 162 genrsa_config.enc = EVP_camellia_192_cbc(); 163 else if (strcmp(*argv, "-camellia256") == 0) 164 genrsa_config.enc = EVP_camellia_256_cbc(); 165 #endif 166 else if (strcmp(*argv, "-passout") == 0) { 167 if (--argc < 1) 168 goto bad; 169 genrsa_config.passargout = *(++argv); 170 } else 171 break; 172 argv++; 173 argc--; 174 } 175 if ((argc >= 1) && ((sscanf(*argv, "%d", &num) == 0) || (num < 0))) { 176 bad: 177 BIO_printf(bio_err, "usage: genrsa [args] [numbits]\n"); 178 #ifndef OPENSSL_NO_DES 179 BIO_printf(bio_err, " -des encrypt the generated key with DES in cbc mode\n"); 180 BIO_printf(bio_err, " -des3 encrypt the generated key with DES in ede cbc mode (168 bit key)\n"); 181 #endif 182 #ifndef OPENSSL_NO_IDEA 183 BIO_printf(bio_err, " -idea encrypt the generated key with IDEA in cbc mode\n"); 184 #endif 185 #ifndef OPENSSL_NO_AES 186 BIO_printf(bio_err, " -aes128, -aes192, -aes256\n"); 187 BIO_printf(bio_err, " encrypt PEM output with cbc aes\n"); 188 #endif 189 #ifndef OPENSSL_NO_CAMELLIA 190 BIO_printf(bio_err, " -camellia128, -camellia192, -camellia256\n"); 191 BIO_printf(bio_err, " encrypt PEM output with cbc camellia\n"); 192 #endif 193 BIO_printf(bio_err, " -out file output the key to 'file\n"); 194 BIO_printf(bio_err, " -passout arg output file pass phrase source\n"); 195 BIO_printf(bio_err, " -f4 use F4 (0x10001) for the E value\n"); 196 BIO_printf(bio_err, " -3 use 3 for the E value\n"); 197 goto err; 198 } 199 200 if (!app_passwd(bio_err, NULL, genrsa_config.passargout, NULL, &passout)) { 201 BIO_printf(bio_err, "Error getting password\n"); 202 goto err; 203 } 204 205 if (genrsa_config.outfile == NULL) { 206 BIO_set_fp(out, stdout, BIO_NOCLOSE); 207 } else { 208 if (BIO_write_filename(out, genrsa_config.outfile) <= 0) { 209 perror(genrsa_config.outfile); 210 goto err; 211 } 212 } 213 214 BIO_printf(bio_err, "Generating RSA private key, %d bit long modulus\n", 215 num); 216 rsa = RSA_new(); 217 if (!rsa) 218 goto err; 219 220 if (!BN_set_word(bn, genrsa_config.f4) || !RSA_generate_key_ex(rsa, num, bn, &cb)) 221 goto err; 222 223 /* 224 * We need to do the following for when the base number size is < 225 * long, esp windows 3.1 :-(. 226 */ 227 l = 0L; 228 for (i = 0; i < rsa->e->top; i++) { 229 #ifndef _LP64 230 l <<= BN_BITS4; 231 l <<= BN_BITS4; 232 #endif 233 l += rsa->e->d[i]; 234 } 235 BIO_printf(bio_err, "e is %ld (0x%lX)\n", l, l); 236 { 237 PW_CB_DATA cb_data; 238 cb_data.password = passout; 239 cb_data.prompt_info = genrsa_config.outfile; 240 if (!PEM_write_bio_RSAPrivateKey(out, rsa, genrsa_config.enc, NULL, 0, 241 password_callback, &cb_data)) 242 goto err; 243 } 244 245 ret = 0; 246 err: 247 BN_free(bn); 248 RSA_free(rsa); 249 BIO_free_all(out); 250 free(passout); 251 252 if (ret != 0) 253 ERR_print_errors(bio_err); 254 255 return (ret); 256 } 257 258 static int 259 genrsa_cb(int p, int n, BN_GENCB * cb) 260 { 261 char c = '*'; 262 263 if (p == 0) 264 c = '.'; 265 if (p == 1) 266 c = '+'; 267 if (p == 2) 268 c = '*'; 269 if (p == 3) 270 c = '\n'; 271 BIO_write(cb->arg, &c, 1); 272 (void) BIO_flush(cb->arg); 273 return 1; 274 } 275