1 /* $OpenBSD: pem_info.c,v 1.24 2020/07/25 11:53:37 schwarze 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; 105 int ok = 0; 106 int num_in, ptype, raw; 107 STACK_OF(X509_INFO) *ret = sk; 108 d2i_of_void *d2i = NULL; 109 110 if (ret == NULL) { 111 if ((ret = sk_X509_INFO_new_null()) == NULL) { 112 PEMerror(ERR_R_MALLOC_FAILURE); 113 return NULL; 114 } 115 } 116 num_in = sk_X509_INFO_num(ret); 117 118 if ((xi = X509_INFO_new()) == NULL) 119 goto err; 120 for (;;) { 121 raw = 0; 122 ptype = 0; 123 if (!PEM_read_bio(bp, &name, &header, &data, &len)) { 124 if (ERR_GET_REASON(ERR_peek_last_error()) == 125 PEM_R_NO_START_LINE) { 126 ERR_clear_error(); 127 break; 128 } 129 goto err; 130 } 131 if ((strcmp(name, PEM_STRING_X509) == 0) || 132 (strcmp(name, PEM_STRING_X509_OLD) == 0)) { 133 d2i = (D2I_OF(void))d2i_X509; 134 if (xi->x509 != NULL) { 135 if (!sk_X509_INFO_push(ret, xi)) 136 goto err; 137 if ((xi = X509_INFO_new()) == NULL) 138 goto err; 139 } 140 pp = &(xi->x509); 141 } else if ((strcmp(name, PEM_STRING_X509_TRUSTED) == 0)) { 142 d2i = (D2I_OF(void))d2i_X509_AUX; 143 if (xi->x509 != NULL) { 144 if (!sk_X509_INFO_push(ret, xi)) 145 goto err; 146 if ((xi = X509_INFO_new()) == NULL) 147 goto err; 148 } 149 pp = &(xi->x509); 150 } else if (strcmp(name, PEM_STRING_X509_CRL) == 0) { 151 d2i = (D2I_OF(void))d2i_X509_CRL; 152 if (xi->crl != NULL) { 153 if (!sk_X509_INFO_push(ret, xi)) 154 goto err; 155 if ((xi = X509_INFO_new()) == NULL) 156 goto err; 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 } 169 xi->enc_data = NULL; 170 xi->enc_len = 0; 171 xi->x_pkey = X509_PKEY_new(); 172 if (xi->x_pkey == NULL) 173 goto err; 174 ptype = EVP_PKEY_RSA; 175 pp = &xi->x_pkey->dec_pkey; 176 if (strlen(header) > 10) /* assume encrypted */ 177 raw = 1; 178 } else 179 #endif 180 #ifndef OPENSSL_NO_DSA 181 if (strcmp(name, PEM_STRING_DSA) == 0) { 182 d2i = (D2I_OF(void))d2i_DSAPrivateKey; 183 if (xi->x_pkey != NULL) { 184 if (!sk_X509_INFO_push(ret, xi)) 185 goto err; 186 if ((xi = X509_INFO_new()) == NULL) 187 goto err; 188 } 189 xi->enc_data = NULL; 190 xi->enc_len = 0; 191 xi->x_pkey = X509_PKEY_new(); 192 if (xi->x_pkey == NULL) 193 goto err; 194 ptype = EVP_PKEY_DSA; 195 pp = &xi->x_pkey->dec_pkey; 196 if (strlen(header) > 10) /* assume encrypted */ 197 raw = 1; 198 } else 199 #endif 200 #ifndef OPENSSL_NO_EC 201 if (strcmp(name, PEM_STRING_ECPRIVATEKEY) == 0) { 202 d2i = (D2I_OF(void))d2i_ECPrivateKey; 203 if (xi->x_pkey != NULL) { 204 if (!sk_X509_INFO_push(ret, xi)) 205 goto err; 206 if ((xi = X509_INFO_new()) == NULL) 207 goto err; 208 } 209 xi->enc_data = NULL; 210 xi->enc_len = 0; 211 xi->x_pkey = X509_PKEY_new(); 212 if (xi->x_pkey == NULL) 213 goto err; 214 ptype = EVP_PKEY_EC; 215 pp = &xi->x_pkey->dec_pkey; 216 if (strlen(header) > 10) /* assume encrypted */ 217 raw = 1; 218 } else 219 #endif 220 { 221 d2i = NULL; 222 pp = NULL; 223 } 224 225 if (d2i != NULL) { 226 if (!raw) { 227 EVP_CIPHER_INFO cipher; 228 229 if (!PEM_get_EVP_CIPHER_INFO(header, &cipher)) 230 goto err; 231 if (!PEM_do_header(&cipher, data, &len, cb, u)) 232 goto err; 233 p = data; 234 if (ptype) { 235 if (!d2i_PrivateKey(ptype, pp, &p, 236 len)) { 237 PEMerror(ERR_R_ASN1_LIB); 238 goto err; 239 } 240 } else if (d2i(pp, &p, len) == NULL) { 241 PEMerror(ERR_R_ASN1_LIB); 242 goto err; 243 } 244 } else { /* encrypted RSA data */ 245 if (!PEM_get_EVP_CIPHER_INFO(header, 246 &xi->enc_cipher)) 247 goto err; 248 xi->enc_data = (char *)data; 249 xi->enc_len = (int)len; 250 data = NULL; 251 } 252 } else { 253 /* unknown */ 254 } 255 free(name); 256 free(header); 257 free(data); 258 name = NULL; 259 header = NULL; 260 data = NULL; 261 } 262 263 /* if the last one hasn't been pushed yet and there is anything 264 * in it then add it to the stack ... 265 */ 266 if ((xi->x509 != NULL) || (xi->crl != NULL) || 267 (xi->x_pkey != NULL) || (xi->enc_data != NULL)) { 268 if (!sk_X509_INFO_push(ret, xi)) 269 goto err; 270 xi = NULL; 271 } 272 ok = 1; 273 274 err: 275 if (!ok) { 276 while (sk_X509_INFO_num(ret) > num_in) 277 X509_INFO_free(sk_X509_INFO_pop(ret)); 278 if (ret != sk) 279 sk_X509_INFO_free(ret); 280 ret = NULL; 281 } 282 X509_INFO_free(xi); 283 free(name); 284 free(header); 285 free(data); 286 287 return ret; 288 } 289 290 291 /* A TJH addition */ 292 int 293 PEM_X509_INFO_write_bio(BIO *bp, X509_INFO *xi, EVP_CIPHER *enc, 294 unsigned char *kstr, int klen, pem_password_cb *cb, void *u) 295 { 296 EVP_CIPHER_CTX ctx; 297 int i, ret = 0; 298 unsigned char *data = NULL; 299 const char *objstr = NULL; 300 char buf[PEM_BUFSIZE]; 301 unsigned char *iv = NULL; 302 303 if (enc != NULL) { 304 objstr = OBJ_nid2sn(EVP_CIPHER_nid(enc)); 305 if (objstr == NULL) { 306 PEMerror(PEM_R_UNSUPPORTED_CIPHER); 307 goto err; 308 } 309 } 310 311 /* now for the fun part ... if we have a private key then 312 * we have to be able to handle a not-yet-decrypted key 313 * being written out correctly ... if it is decrypted or 314 * it is non-encrypted then we use the base code 315 */ 316 if (xi->x_pkey != NULL) { 317 if ((xi->enc_data != NULL) && (xi->enc_len > 0) ) { 318 if (enc == NULL) { 319 PEMerror(PEM_R_CIPHER_IS_NULL); 320 goto err; 321 } 322 323 /* copy from weirdo names into more normal things */ 324 iv = xi->enc_cipher.iv; 325 data = (unsigned char *)xi->enc_data; 326 i = xi->enc_len; 327 328 /* we take the encryption data from the 329 * internal stuff rather than what the 330 * user has passed us ... as we have to 331 * match exactly for some strange reason 332 */ 333 objstr = OBJ_nid2sn( 334 EVP_CIPHER_nid(xi->enc_cipher.cipher)); 335 if (objstr == NULL) { 336 PEMerror(PEM_R_UNSUPPORTED_CIPHER); 337 goto err; 338 } 339 340 /* create the right magic header stuff */ 341 if (strlen(objstr) + 23 + 2 * enc->iv_len + 13 > 342 sizeof buf) { 343 PEMerror(ASN1_R_BUFFER_TOO_SMALL); 344 goto err; 345 } 346 buf[0] = '\0'; 347 PEM_proc_type(buf, PEM_TYPE_ENCRYPTED); 348 PEM_dek_info(buf, objstr, enc->iv_len, (char *)iv); 349 350 /* use the normal code to write things out */ 351 i = PEM_write_bio(bp, PEM_STRING_RSA, buf, data, i); 352 if (i <= 0) 353 goto err; 354 } else { 355 /* Add DSA/DH */ 356 #ifndef OPENSSL_NO_RSA 357 /* normal optionally encrypted stuff */ 358 if (PEM_write_bio_RSAPrivateKey(bp, 359 xi->x_pkey->dec_pkey->pkey.rsa, 360 enc, kstr, klen, cb, u) <= 0) 361 goto err; 362 #endif 363 } 364 } 365 366 /* if we have a certificate then write it out now */ 367 if ((xi->x509 != NULL) && (PEM_write_bio_X509(bp, xi->x509) <= 0)) 368 goto err; 369 370 /* we are ignoring anything else that is loaded into the X509_INFO 371 * structure for the moment ... as I don't need it so I'm not 372 * coding it here and Eric can do it when this makes it into the 373 * base library --tjh 374 */ 375 376 ret = 1; 377 378 err: 379 explicit_bzero((char *)&ctx, sizeof(ctx)); 380 explicit_bzero(buf, PEM_BUFSIZE); 381 return (ret); 382 } 383