1 /* $OpenBSD: pem_info.c,v 1.25 2021/12/12 21:30:14 tb 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 #include "evp_locl.h" 79 80 STACK_OF(X509_INFO) * 81 PEM_X509_INFO_read(FILE *fp, STACK_OF(X509_INFO) *sk, pem_password_cb *cb, 82 void *u) 83 { 84 BIO *b; 85 STACK_OF(X509_INFO) *ret; 86 87 if ((b = BIO_new(BIO_s_file())) == NULL) { 88 PEMerror(ERR_R_BUF_LIB); 89 return (0); 90 } 91 BIO_set_fp(b, fp, BIO_NOCLOSE); 92 ret = PEM_X509_INFO_read_bio(b, sk, cb, u); 93 BIO_free(b); 94 return (ret); 95 } 96 97 STACK_OF(X509_INFO) * 98 PEM_X509_INFO_read_bio(BIO *bp, STACK_OF(X509_INFO) *sk, pem_password_cb *cb, 99 void *u) 100 { 101 X509_INFO *xi = NULL; 102 char *name = NULL, *header = NULL; 103 void *pp; 104 unsigned char *data = NULL; 105 const unsigned char *p; 106 long len; 107 int ok = 0; 108 int num_in, ptype, raw; 109 STACK_OF(X509_INFO) *ret = sk; 110 d2i_of_void *d2i = NULL; 111 112 if (ret == NULL) { 113 if ((ret = sk_X509_INFO_new_null()) == NULL) { 114 PEMerror(ERR_R_MALLOC_FAILURE); 115 return NULL; 116 } 117 } 118 num_in = sk_X509_INFO_num(ret); 119 120 if ((xi = X509_INFO_new()) == NULL) 121 goto err; 122 for (;;) { 123 raw = 0; 124 ptype = 0; 125 if (!PEM_read_bio(bp, &name, &header, &data, &len)) { 126 if (ERR_GET_REASON(ERR_peek_last_error()) == 127 PEM_R_NO_START_LINE) { 128 ERR_clear_error(); 129 break; 130 } 131 goto err; 132 } 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 } 142 pp = &(xi->x509); 143 } else if ((strcmp(name, PEM_STRING_X509_TRUSTED) == 0)) { 144 d2i = (D2I_OF(void))d2i_X509_AUX; 145 if (xi->x509 != NULL) { 146 if (!sk_X509_INFO_push(ret, xi)) 147 goto err; 148 if ((xi = X509_INFO_new()) == NULL) 149 goto err; 150 } 151 pp = &(xi->x509); 152 } else if (strcmp(name, PEM_STRING_X509_CRL) == 0) { 153 d2i = (D2I_OF(void))d2i_X509_CRL; 154 if (xi->crl != NULL) { 155 if (!sk_X509_INFO_push(ret, xi)) 156 goto err; 157 if ((xi = X509_INFO_new()) == NULL) 158 goto err; 159 } 160 pp = &(xi->crl); 161 } else 162 #ifndef OPENSSL_NO_RSA 163 if (strcmp(name, PEM_STRING_RSA) == 0) { 164 d2i = (D2I_OF(void))d2i_RSAPrivateKey; 165 if (xi->x_pkey != NULL) { 166 if (!sk_X509_INFO_push(ret, xi)) 167 goto err; 168 if ((xi = X509_INFO_new()) == NULL) 169 goto err; 170 } 171 xi->enc_data = NULL; 172 xi->enc_len = 0; 173 xi->x_pkey = X509_PKEY_new(); 174 if (xi->x_pkey == NULL) 175 goto err; 176 ptype = EVP_PKEY_RSA; 177 pp = &xi->x_pkey->dec_pkey; 178 if (strlen(header) > 10) /* assume encrypted */ 179 raw = 1; 180 } else 181 #endif 182 #ifndef OPENSSL_NO_DSA 183 if (strcmp(name, PEM_STRING_DSA) == 0) { 184 d2i = (D2I_OF(void))d2i_DSAPrivateKey; 185 if (xi->x_pkey != NULL) { 186 if (!sk_X509_INFO_push(ret, xi)) 187 goto err; 188 if ((xi = X509_INFO_new()) == NULL) 189 goto err; 190 } 191 xi->enc_data = NULL; 192 xi->enc_len = 0; 193 xi->x_pkey = X509_PKEY_new(); 194 if (xi->x_pkey == NULL) 195 goto err; 196 ptype = EVP_PKEY_DSA; 197 pp = &xi->x_pkey->dec_pkey; 198 if (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 } 211 xi->enc_data = NULL; 212 xi->enc_len = 0; 213 xi->x_pkey = X509_PKEY_new(); 214 if (xi->x_pkey == NULL) 215 goto err; 216 ptype = EVP_PKEY_EC; 217 pp = &xi->x_pkey->dec_pkey; 218 if (strlen(header) > 10) /* assume encrypted */ 219 raw = 1; 220 } else 221 #endif 222 { 223 d2i = NULL; 224 pp = NULL; 225 } 226 227 if (d2i != NULL) { 228 if (!raw) { 229 EVP_CIPHER_INFO cipher; 230 231 if (!PEM_get_EVP_CIPHER_INFO(header, &cipher)) 232 goto err; 233 if (!PEM_do_header(&cipher, data, &len, cb, u)) 234 goto err; 235 p = data; 236 if (ptype) { 237 if (!d2i_PrivateKey(ptype, pp, &p, 238 len)) { 239 PEMerror(ERR_R_ASN1_LIB); 240 goto err; 241 } 242 } else if (d2i(pp, &p, len) == NULL) { 243 PEMerror(ERR_R_ASN1_LIB); 244 goto err; 245 } 246 } else { /* encrypted RSA data */ 247 if (!PEM_get_EVP_CIPHER_INFO(header, 248 &xi->enc_cipher)) 249 goto err; 250 xi->enc_data = (char *)data; 251 xi->enc_len = (int)len; 252 data = NULL; 253 } 254 } else { 255 /* unknown */ 256 } 257 free(name); 258 free(header); 259 free(data); 260 name = NULL; 261 header = NULL; 262 data = NULL; 263 } 264 265 /* if the last one hasn't been pushed yet and there is anything 266 * in it then add it to the stack ... 267 */ 268 if ((xi->x509 != NULL) || (xi->crl != NULL) || 269 (xi->x_pkey != NULL) || (xi->enc_data != NULL)) { 270 if (!sk_X509_INFO_push(ret, xi)) 271 goto err; 272 xi = NULL; 273 } 274 ok = 1; 275 276 err: 277 if (!ok) { 278 while (sk_X509_INFO_num(ret) > num_in) 279 X509_INFO_free(sk_X509_INFO_pop(ret)); 280 if (ret != sk) 281 sk_X509_INFO_free(ret); 282 ret = NULL; 283 } 284 X509_INFO_free(xi); 285 free(name); 286 free(header); 287 free(data); 288 289 return ret; 290 } 291 292 293 /* A TJH addition */ 294 int 295 PEM_X509_INFO_write_bio(BIO *bp, X509_INFO *xi, EVP_CIPHER *enc, 296 unsigned char *kstr, int klen, pem_password_cb *cb, void *u) 297 { 298 EVP_CIPHER_CTX ctx; 299 int i, ret = 0; 300 unsigned char *data = NULL; 301 const char *objstr = NULL; 302 char buf[PEM_BUFSIZE]; 303 unsigned char *iv = NULL; 304 305 if (enc != NULL) { 306 objstr = OBJ_nid2sn(EVP_CIPHER_nid(enc)); 307 if (objstr == NULL) { 308 PEMerror(PEM_R_UNSUPPORTED_CIPHER); 309 goto err; 310 } 311 } 312 313 /* now for the fun part ... if we have a private key then 314 * we have to be able to handle a not-yet-decrypted key 315 * being written out correctly ... if it is decrypted or 316 * it is non-encrypted then we use the base code 317 */ 318 if (xi->x_pkey != NULL) { 319 if ((xi->enc_data != NULL) && (xi->enc_len > 0) ) { 320 if (enc == NULL) { 321 PEMerror(PEM_R_CIPHER_IS_NULL); 322 goto err; 323 } 324 325 /* copy from weirdo names into more normal things */ 326 iv = xi->enc_cipher.iv; 327 data = (unsigned char *)xi->enc_data; 328 i = xi->enc_len; 329 330 /* we take the encryption data from the 331 * internal stuff rather than what the 332 * user has passed us ... as we have to 333 * match exactly for some strange reason 334 */ 335 objstr = OBJ_nid2sn( 336 EVP_CIPHER_nid(xi->enc_cipher.cipher)); 337 if (objstr == NULL) { 338 PEMerror(PEM_R_UNSUPPORTED_CIPHER); 339 goto err; 340 } 341 342 /* create the right magic header stuff */ 343 if (strlen(objstr) + 23 + 2 * enc->iv_len + 13 > 344 sizeof buf) { 345 PEMerror(ASN1_R_BUFFER_TOO_SMALL); 346 goto err; 347 } 348 buf[0] = '\0'; 349 PEM_proc_type(buf, PEM_TYPE_ENCRYPTED); 350 PEM_dek_info(buf, objstr, enc->iv_len, (char *)iv); 351 352 /* use the normal code to write things out */ 353 i = PEM_write_bio(bp, PEM_STRING_RSA, buf, data, i); 354 if (i <= 0) 355 goto err; 356 } else { 357 /* Add DSA/DH */ 358 #ifndef OPENSSL_NO_RSA 359 /* normal optionally encrypted stuff */ 360 if (PEM_write_bio_RSAPrivateKey(bp, 361 xi->x_pkey->dec_pkey->pkey.rsa, 362 enc, kstr, klen, cb, u) <= 0) 363 goto err; 364 #endif 365 } 366 } 367 368 /* if we have a certificate then write it out now */ 369 if ((xi->x509 != NULL) && (PEM_write_bio_X509(bp, xi->x509) <= 0)) 370 goto err; 371 372 /* we are ignoring anything else that is loaded into the X509_INFO 373 * structure for the moment ... as I don't need it so I'm not 374 * coding it here and Eric can do it when this makes it into the 375 * base library --tjh 376 */ 377 378 ret = 1; 379 380 err: 381 explicit_bzero((char *)&ctx, sizeof(ctx)); 382 explicit_bzero(buf, PEM_BUFSIZE); 383 return (ret); 384 } 385