1 /* $OpenBSD: pem_info.c,v 1.22 2017/01/29 17:49:23 beck 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 PEMerror(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 PEMerror(ERR_R_MALLOC_FAILURE); 113 return 0; 114 } 115 } else 116 ret = sk; 117 118 if ((xi = X509_INFO_new()) == NULL) 119 goto err; 120 for (;;) { 121 raw = 0; 122 ptype = 0; 123 i = PEM_read_bio(bp, &name, &header, &data, &len); 124 if (i == 0) { 125 error = ERR_GET_REASON(ERR_peek_last_error()); 126 if (error == PEM_R_NO_START_LINE) { 127 ERR_clear_error(); 128 break; 129 } 130 goto err; 131 } 132 start: 133 if ((strcmp(name, PEM_STRING_X509) == 0) || 134 (strcmp(name, PEM_STRING_X509_OLD) == 0)) { 135 d2i = (D2I_OF(void))d2i_X509; 136 if (xi->x509 != NULL) { 137 if (!sk_X509_INFO_push(ret, xi)) 138 goto err; 139 if ((xi = X509_INFO_new()) == NULL) 140 goto err; 141 goto start; 142 } 143 pp = &(xi->x509); 144 } else if ((strcmp(name, PEM_STRING_X509_TRUSTED) == 0)) { 145 d2i = (D2I_OF(void))d2i_X509_AUX; 146 if (xi->x509 != NULL) { 147 if (!sk_X509_INFO_push(ret, xi)) 148 goto err; 149 if ((xi = X509_INFO_new()) == NULL) 150 goto err; 151 goto start; 152 } 153 pp = &(xi->x509); 154 } else if (strcmp(name, PEM_STRING_X509_CRL) == 0) { 155 d2i = (D2I_OF(void))d2i_X509_CRL; 156 if (xi->crl != NULL) { 157 if (!sk_X509_INFO_push(ret, xi)) 158 goto err; 159 if ((xi = X509_INFO_new()) == NULL) 160 goto err; 161 goto start; 162 } 163 pp = &(xi->crl); 164 } else 165 #ifndef OPENSSL_NO_RSA 166 if (strcmp(name, PEM_STRING_RSA) == 0) { 167 d2i = (D2I_OF(void))d2i_RSAPrivateKey; 168 if (xi->x_pkey != NULL) { 169 if (!sk_X509_INFO_push(ret, xi)) 170 goto err; 171 if ((xi = X509_INFO_new()) == NULL) 172 goto err; 173 goto start; 174 } 175 176 xi->enc_data = NULL; 177 xi->enc_len = 0; 178 179 xi->x_pkey = X509_PKEY_new(); 180 if (xi->x_pkey == NULL) 181 goto err; 182 ptype = EVP_PKEY_RSA; 183 pp = &xi->x_pkey->dec_pkey; 184 if (strlen(header) > 10) /* assume encrypted */ 185 raw = 1; 186 } else 187 #endif 188 #ifndef OPENSSL_NO_DSA 189 if (strcmp(name, PEM_STRING_DSA) == 0) { 190 d2i = (D2I_OF(void))d2i_DSAPrivateKey; 191 if (xi->x_pkey != NULL) { 192 if (!sk_X509_INFO_push(ret, xi)) 193 goto err; 194 if ((xi = X509_INFO_new()) == NULL) 195 goto err; 196 goto start; 197 } 198 199 xi->enc_data = NULL; 200 xi->enc_len = 0; 201 202 xi->x_pkey = X509_PKEY_new(); 203 if (xi->x_pkey == NULL) 204 goto err; 205 ptype = EVP_PKEY_DSA; 206 pp = &xi->x_pkey->dec_pkey; 207 if (strlen(header) > 10) /* assume encrypted */ 208 raw = 1; 209 } else 210 #endif 211 #ifndef OPENSSL_NO_EC 212 if (strcmp(name, PEM_STRING_ECPRIVATEKEY) == 0) { 213 d2i = (D2I_OF(void))d2i_ECPrivateKey; 214 if (xi->x_pkey != NULL) { 215 if (!sk_X509_INFO_push(ret, xi)) 216 goto err; 217 if ((xi = X509_INFO_new()) == NULL) 218 goto err; 219 goto start; 220 } 221 222 xi->enc_data = NULL; 223 xi->enc_len = 0; 224 225 xi->x_pkey = X509_PKEY_new(); 226 if (xi->x_pkey == NULL) 227 goto err; 228 ptype = EVP_PKEY_EC; 229 pp = &xi->x_pkey->dec_pkey; 230 if (strlen(header) > 10) /* assume encrypted */ 231 raw = 1; 232 } else 233 #endif 234 { 235 d2i = NULL; 236 pp = NULL; 237 } 238 239 if (d2i != NULL) { 240 if (!raw) { 241 EVP_CIPHER_INFO cipher; 242 243 if (!PEM_get_EVP_CIPHER_INFO(header, &cipher)) 244 goto err; 245 if (!PEM_do_header(&cipher, data, &len, cb, u)) 246 goto err; 247 p = data; 248 if (ptype) { 249 if (!d2i_PrivateKey(ptype, pp, &p, 250 len)) { 251 PEMerror(ERR_R_ASN1_LIB); 252 goto err; 253 } 254 } else if (d2i(pp, &p, len) == NULL) { 255 PEMerror(ERR_R_ASN1_LIB); 256 goto err; 257 } 258 } else { /* encrypted RSA data */ 259 if (!PEM_get_EVP_CIPHER_INFO(header, 260 &xi->enc_cipher)) 261 goto err; 262 xi->enc_data = (char *)data; 263 xi->enc_len = (int)len; 264 data = NULL; 265 } 266 } else { 267 /* unknown */ 268 } 269 free(name); 270 free(header); 271 free(data); 272 name = NULL; 273 header = NULL; 274 data = NULL; 275 } 276 277 /* if the last one hasn't been pushed yet and there is anything 278 * in it then add it to the stack ... 279 */ 280 if ((xi->x509 != NULL) || (xi->crl != NULL) || 281 (xi->x_pkey != NULL) || (xi->enc_data != NULL)) { 282 if (!sk_X509_INFO_push(ret, xi)) 283 goto err; 284 xi = NULL; 285 } 286 ok = 1; 287 288 err: 289 if (xi != NULL) 290 X509_INFO_free(xi); 291 if (!ok) { 292 for (i = 0; ((int)i) < sk_X509_INFO_num(ret); i++) { 293 xi = sk_X509_INFO_value(ret, i); 294 X509_INFO_free(xi); 295 } 296 if (ret != sk) 297 sk_X509_INFO_free(ret); 298 ret = NULL; 299 } 300 301 free(name); 302 free(header); 303 free(data); 304 return (ret); 305 } 306 307 308 /* A TJH addition */ 309 int 310 PEM_X509_INFO_write_bio(BIO *bp, X509_INFO *xi, EVP_CIPHER *enc, 311 unsigned char *kstr, int klen, pem_password_cb *cb, void *u) 312 { 313 EVP_CIPHER_CTX ctx; 314 int i, ret = 0; 315 unsigned char *data = NULL; 316 const char *objstr = NULL; 317 char buf[PEM_BUFSIZE]; 318 unsigned char *iv = NULL; 319 320 if (enc != NULL) { 321 objstr = OBJ_nid2sn(EVP_CIPHER_nid(enc)); 322 if (objstr == NULL) { 323 PEMerror(PEM_R_UNSUPPORTED_CIPHER); 324 goto err; 325 } 326 } 327 328 /* now for the fun part ... if we have a private key then 329 * we have to be able to handle a not-yet-decrypted key 330 * being written out correctly ... if it is decrypted or 331 * it is non-encrypted then we use the base code 332 */ 333 if (xi->x_pkey != NULL) { 334 if ((xi->enc_data != NULL) && (xi->enc_len > 0) ) { 335 if (enc == NULL) { 336 PEMerror(PEM_R_CIPHER_IS_NULL); 337 goto err; 338 } 339 340 /* copy from weirdo names into more normal things */ 341 iv = xi->enc_cipher.iv; 342 data = (unsigned char *)xi->enc_data; 343 i = xi->enc_len; 344 345 /* we take the encryption data from the 346 * internal stuff rather than what the 347 * user has passed us ... as we have to 348 * match exactly for some strange reason 349 */ 350 objstr = OBJ_nid2sn( 351 EVP_CIPHER_nid(xi->enc_cipher.cipher)); 352 if (objstr == NULL) { 353 PEMerror(PEM_R_UNSUPPORTED_CIPHER); 354 goto err; 355 } 356 357 /* create the right magic header stuff */ 358 if (strlen(objstr) + 23 + 2 * enc->iv_len + 13 > 359 sizeof buf) { 360 PEMerror(ASN1_R_BUFFER_TOO_SMALL); 361 goto err; 362 } 363 buf[0] = '\0'; 364 PEM_proc_type(buf, PEM_TYPE_ENCRYPTED); 365 PEM_dek_info(buf, objstr, enc->iv_len, (char *)iv); 366 367 /* use the normal code to write things out */ 368 i = PEM_write_bio(bp, PEM_STRING_RSA, buf, data, i); 369 if (i <= 0) 370 goto err; 371 } else { 372 /* Add DSA/DH */ 373 #ifndef OPENSSL_NO_RSA 374 /* normal optionally encrypted stuff */ 375 if (PEM_write_bio_RSAPrivateKey(bp, 376 xi->x_pkey->dec_pkey->pkey.rsa, 377 enc, kstr, klen, cb, u) <= 0) 378 goto err; 379 #endif 380 } 381 } 382 383 /* if we have a certificate then write it out now */ 384 if ((xi->x509 != NULL) && (PEM_write_bio_X509(bp, xi->x509) <= 0)) 385 goto err; 386 387 /* we are ignoring anything else that is loaded into the X509_INFO 388 * structure for the moment ... as I don't need it so I'm not 389 * coding it here and Eric can do it when this makes it into the 390 * base library --tjh 391 */ 392 393 ret = 1; 394 395 err: 396 explicit_bzero((char *)&ctx, sizeof(ctx)); 397 explicit_bzero(buf, PEM_BUFSIZE); 398 return (ret); 399 } 400