1 /* $OpenBSD: genrsa.c,v 1.12 2018/12/09 19:30:34 tobias 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 int 89 genrsa_main(int argc, char **argv) 90 { 91 BN_GENCB cb; 92 int ret = 1; 93 int i, num = DEFBITS; 94 long l; 95 const EVP_CIPHER *enc = NULL; 96 unsigned long f4 = RSA_F4; 97 char *outfile = NULL; 98 char *passargout = NULL, *passout = NULL; 99 BIO *out = NULL; 100 BIGNUM *bn = BN_new(); 101 RSA *rsa = NULL; 102 103 if (single_execution) { 104 if (pledge("stdio cpath wpath rpath tty", NULL) == -1) { 105 perror("pledge"); 106 exit(1); 107 } 108 } 109 110 if (!bn) 111 goto err; 112 113 BN_GENCB_set(&cb, genrsa_cb, bio_err); 114 115 if ((out = BIO_new(BIO_s_file())) == NULL) { 116 BIO_printf(bio_err, "unable to create BIO for output\n"); 117 goto err; 118 } 119 argv++; 120 argc--; 121 for (;;) { 122 if (argc <= 0) 123 break; 124 if (strcmp(*argv, "-out") == 0) { 125 if (--argc < 1) 126 goto bad; 127 outfile = *(++argv); 128 } else if (strcmp(*argv, "-3") == 0) 129 f4 = 3; 130 else if (strcmp(*argv, "-F4") == 0 || strcmp(*argv, "-f4") == 0) 131 f4 = RSA_F4; 132 #ifndef OPENSSL_NO_DES 133 else if (strcmp(*argv, "-des") == 0) 134 enc = EVP_des_cbc(); 135 else if (strcmp(*argv, "-des3") == 0) 136 enc = EVP_des_ede3_cbc(); 137 #endif 138 #ifndef OPENSSL_NO_IDEA 139 else if (strcmp(*argv, "-idea") == 0) 140 enc = EVP_idea_cbc(); 141 #endif 142 #ifndef OPENSSL_NO_AES 143 else if (strcmp(*argv, "-aes128") == 0) 144 enc = EVP_aes_128_cbc(); 145 else if (strcmp(*argv, "-aes192") == 0) 146 enc = EVP_aes_192_cbc(); 147 else if (strcmp(*argv, "-aes256") == 0) 148 enc = EVP_aes_256_cbc(); 149 #endif 150 #ifndef OPENSSL_NO_CAMELLIA 151 else if (strcmp(*argv, "-camellia128") == 0) 152 enc = EVP_camellia_128_cbc(); 153 else if (strcmp(*argv, "-camellia192") == 0) 154 enc = EVP_camellia_192_cbc(); 155 else if (strcmp(*argv, "-camellia256") == 0) 156 enc = EVP_camellia_256_cbc(); 157 #endif 158 else if (strcmp(*argv, "-passout") == 0) { 159 if (--argc < 1) 160 goto bad; 161 passargout = *(++argv); 162 } else 163 break; 164 argv++; 165 argc--; 166 } 167 if ((argc >= 1) && ((sscanf(*argv, "%d", &num) == 0) || (num < 0))) { 168 bad: 169 BIO_printf(bio_err, "usage: genrsa [args] [numbits]\n"); 170 #ifndef OPENSSL_NO_DES 171 BIO_printf(bio_err, " -des encrypt the generated key with DES in cbc mode\n"); 172 BIO_printf(bio_err, " -des3 encrypt the generated key with DES in ede cbc mode (168 bit key)\n"); 173 #endif 174 #ifndef OPENSSL_NO_IDEA 175 BIO_printf(bio_err, " -idea encrypt the generated key with IDEA in cbc mode\n"); 176 #endif 177 #ifndef OPENSSL_NO_AES 178 BIO_printf(bio_err, " -aes128, -aes192, -aes256\n"); 179 BIO_printf(bio_err, " encrypt PEM output with cbc aes\n"); 180 #endif 181 #ifndef OPENSSL_NO_CAMELLIA 182 BIO_printf(bio_err, " -camellia128, -camellia192, -camellia256\n"); 183 BIO_printf(bio_err, " encrypt PEM output with cbc camellia\n"); 184 #endif 185 BIO_printf(bio_err, " -out file output the key to 'file\n"); 186 BIO_printf(bio_err, " -passout arg output file pass phrase source\n"); 187 BIO_printf(bio_err, " -f4 use F4 (0x10001) for the E value\n"); 188 BIO_printf(bio_err, " -3 use 3 for the E value\n"); 189 goto err; 190 } 191 192 if (!app_passwd(bio_err, NULL, passargout, NULL, &passout)) { 193 BIO_printf(bio_err, "Error getting password\n"); 194 goto err; 195 } 196 197 if (outfile == NULL) { 198 BIO_set_fp(out, stdout, BIO_NOCLOSE); 199 } else { 200 if (BIO_write_filename(out, outfile) <= 0) { 201 perror(outfile); 202 goto err; 203 } 204 } 205 206 BIO_printf(bio_err, "Generating RSA private key, %d bit long modulus\n", 207 num); 208 rsa = RSA_new(); 209 if (!rsa) 210 goto err; 211 212 if (!BN_set_word(bn, f4) || !RSA_generate_key_ex(rsa, num, bn, &cb)) 213 goto err; 214 215 /* 216 * We need to do the following for when the base number size is < 217 * long, esp windows 3.1 :-(. 218 */ 219 l = 0L; 220 for (i = 0; i < rsa->e->top; i++) { 221 #ifndef _LP64 222 l <<= BN_BITS4; 223 l <<= BN_BITS4; 224 #endif 225 l += rsa->e->d[i]; 226 } 227 BIO_printf(bio_err, "e is %ld (0x%lX)\n", l, l); 228 { 229 PW_CB_DATA cb_data; 230 cb_data.password = passout; 231 cb_data.prompt_info = outfile; 232 if (!PEM_write_bio_RSAPrivateKey(out, rsa, enc, NULL, 0, 233 password_callback, &cb_data)) 234 goto err; 235 } 236 237 ret = 0; 238 err: 239 BN_free(bn); 240 RSA_free(rsa); 241 BIO_free_all(out); 242 free(passout); 243 244 if (ret != 0) 245 ERR_print_errors(bio_err); 246 247 return (ret); 248 } 249 250 static int 251 genrsa_cb(int p, int n, BN_GENCB * cb) 252 { 253 char c = '*'; 254 255 if (p == 0) 256 c = '.'; 257 if (p == 1) 258 c = '+'; 259 if (p == 2) 260 c = '*'; 261 if (p == 3) 262 c = '\n'; 263 BIO_write(cb->arg, &c, 1); 264 (void) BIO_flush(cb->arg); 265 return 1; 266 } 267