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