1 /* $OpenBSD: pem_info.c,v 1.20 2015/02/10 09:52:35 miod 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 <stdio.h> 60 #include <string.h> 61 62 #include <openssl/opensslconf.h> 63 64 #include <openssl/buffer.h> 65 #include <openssl/err.h> 66 #include <openssl/evp.h> 67 #include <openssl/objects.h> 68 #include <openssl/pem.h> 69 #include <openssl/x509.h> 70 71 #ifndef OPENSSL_NO_DSA 72 #include <openssl/dsa.h> 73 #endif 74 #ifndef OPENSSL_NO_RSA 75 #include <openssl/rsa.h> 76 #endif 77 78 STACK_OF(X509_INFO) * 79 PEM_X509_INFO_read(FILE *fp, STACK_OF(X509_INFO) *sk, pem_password_cb *cb, 80 void *u) 81 { 82 BIO *b; 83 STACK_OF(X509_INFO) *ret; 84 85 if ((b = BIO_new(BIO_s_file())) == NULL) { 86 PEMerr(PEM_F_PEM_X509_INFO_READ, ERR_R_BUF_LIB); 87 return (0); 88 } 89 BIO_set_fp(b, fp, BIO_NOCLOSE); 90 ret = PEM_X509_INFO_read_bio(b, sk, cb, u); 91 BIO_free(b); 92 return (ret); 93 } 94 95 STACK_OF(X509_INFO) * 96 PEM_X509_INFO_read_bio(BIO *bp, STACK_OF(X509_INFO) *sk, pem_password_cb *cb, 97 void *u) 98 { 99 X509_INFO *xi = NULL; 100 char *name = NULL, *header = NULL; 101 void *pp; 102 unsigned char *data = NULL; 103 const unsigned char *p; 104 long len, error = 0; 105 int ok = 0; 106 STACK_OF(X509_INFO) *ret = NULL; 107 unsigned int i, raw, ptype; 108 d2i_of_void *d2i = 0; 109 110 if (sk == NULL) { 111 if ((ret = sk_X509_INFO_new_null()) == NULL) { 112 PEMerr(PEM_F_PEM_X509_INFO_READ_BIO, 113 ERR_R_MALLOC_FAILURE); 114 return 0; 115 } 116 } else 117 ret = sk; 118 119 if ((xi = X509_INFO_new()) == NULL) 120 goto err; 121 for (;;) { 122 raw = 0; 123 ptype = 0; 124 i = PEM_read_bio(bp, &name, &header, &data, &len); 125 if (i == 0) { 126 error = ERR_GET_REASON(ERR_peek_last_error()); 127 if (error == PEM_R_NO_START_LINE) { 128 ERR_clear_error(); 129 break; 130 } 131 goto err; 132 } 133 start: 134 if ((strcmp(name, PEM_STRING_X509) == 0) || 135 (strcmp(name, PEM_STRING_X509_OLD) == 0)) { 136 d2i = (D2I_OF(void))d2i_X509; 137 if (xi->x509 != NULL) { 138 if (!sk_X509_INFO_push(ret, xi)) 139 goto err; 140 if ((xi = X509_INFO_new()) == NULL) 141 goto err; 142 goto start; 143 } 144 pp = &(xi->x509); 145 } else if ((strcmp(name, PEM_STRING_X509_TRUSTED) == 0)) { 146 d2i = (D2I_OF(void))d2i_X509_AUX; 147 if (xi->x509 != NULL) { 148 if (!sk_X509_INFO_push(ret, xi)) 149 goto err; 150 if ((xi = X509_INFO_new()) == NULL) 151 goto err; 152 goto start; 153 } 154 pp = &(xi->x509); 155 } else if (strcmp(name, PEM_STRING_X509_CRL) == 0) { 156 d2i = (D2I_OF(void))d2i_X509_CRL; 157 if (xi->crl != NULL) { 158 if (!sk_X509_INFO_push(ret, xi)) 159 goto err; 160 if ((xi = X509_INFO_new()) == NULL) 161 goto err; 162 goto start; 163 } 164 pp = &(xi->crl); 165 } else 166 #ifndef OPENSSL_NO_RSA 167 if (strcmp(name, PEM_STRING_RSA) == 0) { 168 d2i = (D2I_OF(void))d2i_RSAPrivateKey; 169 if (xi->x_pkey != NULL) { 170 if (!sk_X509_INFO_push(ret, xi)) 171 goto err; 172 if ((xi = X509_INFO_new()) == NULL) 173 goto err; 174 goto start; 175 } 176 177 xi->enc_data = NULL; 178 xi->enc_len = 0; 179 180 xi->x_pkey = X509_PKEY_new(); 181 if (xi->x_pkey == NULL) 182 goto err; 183 ptype = EVP_PKEY_RSA; 184 pp = &xi->x_pkey->dec_pkey; 185 if (strlen(header) > 10) /* assume encrypted */ 186 raw = 1; 187 } else 188 #endif 189 #ifndef OPENSSL_NO_DSA 190 if (strcmp(name, PEM_STRING_DSA) == 0) { 191 d2i = (D2I_OF(void))d2i_DSAPrivateKey; 192 if (xi->x_pkey != NULL) { 193 if (!sk_X509_INFO_push(ret, xi)) 194 goto err; 195 if ((xi = X509_INFO_new()) == NULL) 196 goto err; 197 goto start; 198 } 199 200 xi->enc_data = NULL; 201 xi->enc_len = 0; 202 203 xi->x_pkey = X509_PKEY_new(); 204 if (xi->x_pkey == NULL) 205 goto err; 206 ptype = EVP_PKEY_DSA; 207 pp = &xi->x_pkey->dec_pkey; 208 if (strlen(header) > 10) /* assume encrypted */ 209 raw = 1; 210 } else 211 #endif 212 #ifndef OPENSSL_NO_EC 213 if (strcmp(name, PEM_STRING_ECPRIVATEKEY) == 0) { 214 d2i = (D2I_OF(void))d2i_ECPrivateKey; 215 if (xi->x_pkey != NULL) { 216 if (!sk_X509_INFO_push(ret, xi)) 217 goto err; 218 if ((xi = X509_INFO_new()) == NULL) 219 goto err; 220 goto start; 221 } 222 223 xi->enc_data = NULL; 224 xi->enc_len = 0; 225 226 xi->x_pkey = X509_PKEY_new(); 227 if (xi->x_pkey == NULL) 228 goto err; 229 ptype = EVP_PKEY_EC; 230 pp = &xi->x_pkey->dec_pkey; 231 if (strlen(header) > 10) /* assume encrypted */ 232 raw = 1; 233 } else 234 #endif 235 { 236 d2i = NULL; 237 pp = NULL; 238 } 239 240 if (d2i != NULL) { 241 if (!raw) { 242 EVP_CIPHER_INFO cipher; 243 244 if (!PEM_get_EVP_CIPHER_INFO(header, &cipher)) 245 goto err; 246 if (!PEM_do_header(&cipher, data, &len, cb, u)) 247 goto err; 248 p = data; 249 if (ptype) { 250 if (!d2i_PrivateKey(ptype, pp, &p, 251 len)) { 252 PEMerr(PEM_F_PEM_X509_INFO_READ_BIO, 253 ERR_R_ASN1_LIB); 254 goto err; 255 } 256 } else if (d2i(pp, &p, len) == NULL) { 257 PEMerr(PEM_F_PEM_X509_INFO_READ_BIO, 258 ERR_R_ASN1_LIB); 259 goto err; 260 } 261 } else { /* encrypted RSA data */ 262 if (!PEM_get_EVP_CIPHER_INFO(header, 263 &xi->enc_cipher)) 264 goto err; 265 xi->enc_data = (char *)data; 266 xi->enc_len = (int)len; 267 data = NULL; 268 } 269 } else { 270 /* unknown */ 271 } 272 free(name); 273 free(header); 274 free(data); 275 name = NULL; 276 header = NULL; 277 data = NULL; 278 } 279 280 /* if the last one hasn't been pushed yet and there is anything 281 * in it then add it to the stack ... 282 */ 283 if ((xi->x509 != NULL) || (xi->crl != NULL) || 284 (xi->x_pkey != NULL) || (xi->enc_data != NULL)) { 285 if (!sk_X509_INFO_push(ret, xi)) 286 goto err; 287 xi = NULL; 288 } 289 ok = 1; 290 291 err: 292 if (xi != NULL) 293 X509_INFO_free(xi); 294 if (!ok) { 295 for (i = 0; ((int)i) < sk_X509_INFO_num(ret); i++) { 296 xi = sk_X509_INFO_value(ret, i); 297 X509_INFO_free(xi); 298 } 299 if (ret != sk) 300 sk_X509_INFO_free(ret); 301 ret = NULL; 302 } 303 304 free(name); 305 free(header); 306 free(data); 307 return (ret); 308 } 309 310 311 /* A TJH addition */ 312 int 313 PEM_X509_INFO_write_bio(BIO *bp, X509_INFO *xi, EVP_CIPHER *enc, 314 unsigned char *kstr, int klen, pem_password_cb *cb, void *u) 315 { 316 EVP_CIPHER_CTX ctx; 317 int i, ret = 0; 318 unsigned char *data = NULL; 319 const char *objstr = NULL; 320 char buf[PEM_BUFSIZE]; 321 unsigned char *iv = NULL; 322 323 if (enc != NULL) { 324 objstr = OBJ_nid2sn(EVP_CIPHER_nid(enc)); 325 if (objstr == NULL) { 326 PEMerr(PEM_F_PEM_X509_INFO_WRITE_BIO, 327 PEM_R_UNSUPPORTED_CIPHER); 328 goto err; 329 } 330 } 331 332 /* now for the fun part ... if we have a private key then 333 * we have to be able to handle a not-yet-decrypted key 334 * being written out correctly ... if it is decrypted or 335 * it is non-encrypted then we use the base code 336 */ 337 if (xi->x_pkey != NULL) { 338 if ((xi->enc_data != NULL) && (xi->enc_len > 0) ) { 339 if (enc == NULL) { 340 PEMerr(PEM_F_PEM_X509_INFO_WRITE_BIO, 341 PEM_R_CIPHER_IS_NULL); 342 goto err; 343 } 344 345 /* copy from weirdo names into more normal things */ 346 iv = xi->enc_cipher.iv; 347 data = (unsigned char *)xi->enc_data; 348 i = xi->enc_len; 349 350 /* we take the encryption data from the 351 * internal stuff rather than what the 352 * user has passed us ... as we have to 353 * match exactly for some strange reason 354 */ 355 objstr = OBJ_nid2sn( 356 EVP_CIPHER_nid(xi->enc_cipher.cipher)); 357 if (objstr == NULL) { 358 PEMerr(PEM_F_PEM_X509_INFO_WRITE_BIO, 359 PEM_R_UNSUPPORTED_CIPHER); 360 goto err; 361 } 362 363 /* create the right magic header stuff */ 364 if (strlen(objstr) + 23 + 2 * enc->iv_len + 13 > 365 sizeof buf) { 366 PEMerr(PEM_F_PEM_X509_INFO_WRITE_BIO, 367 ASN1_R_BUFFER_TOO_SMALL); 368 goto err; 369 } 370 buf[0] = '\0'; 371 PEM_proc_type(buf, PEM_TYPE_ENCRYPTED); 372 PEM_dek_info(buf, objstr, enc->iv_len, (char *)iv); 373 374 /* use the normal code to write things out */ 375 i = PEM_write_bio(bp, PEM_STRING_RSA, buf, data, i); 376 if (i <= 0) 377 goto err; 378 } else { 379 /* Add DSA/DH */ 380 #ifndef OPENSSL_NO_RSA 381 /* normal optionally encrypted stuff */ 382 if (PEM_write_bio_RSAPrivateKey(bp, 383 xi->x_pkey->dec_pkey->pkey.rsa, 384 enc, kstr, klen, cb, u) <= 0) 385 goto err; 386 #endif 387 } 388 } 389 390 /* if we have a certificate then write it out now */ 391 if ((xi->x509 != NULL) && (PEM_write_bio_X509(bp, xi->x509) <= 0)) 392 goto err; 393 394 /* we are ignoring anything else that is loaded into the X509_INFO 395 * structure for the moment ... as I don't need it so I'm not 396 * coding it here and Eric can do it when this makes it into the 397 * base library --tjh 398 */ 399 400 ret = 1; 401 402 err: 403 explicit_bzero((char *)&ctx, sizeof(ctx)); 404 explicit_bzero(buf, PEM_BUFSIZE); 405 return (ret); 406 } 407