1/* $OpenBSD: pem_info.c,v 1.27 2023/07/07 13:40:44 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#include "evp_local.h" 79 80STACK_OF(X509_INFO) * 81PEM_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} 96LCRYPTO_ALIAS(PEM_X509_INFO_read); 97 98STACK_OF(X509_INFO) * 99PEM_X509_INFO_read_bio(BIO *bp, STACK_OF(X509_INFO) *sk, pem_password_cb *cb, 100 void *u) 101{ 102 X509_INFO *xi = NULL; 103 char *name = NULL, *header = NULL; 104 void *pp; 105 unsigned char *data = NULL; 106 const unsigned char *p; 107 long len; 108 int ok = 0; 109 int num_in, ptype, raw; 110 STACK_OF(X509_INFO) *ret = sk; 111 d2i_of_void *d2i = NULL; 112 113 if (ret == NULL) { 114 if ((ret = sk_X509_INFO_new_null()) == NULL) { 115 PEMerror(ERR_R_MALLOC_FAILURE); 116 return NULL; 117 } 118 } 119 num_in = sk_X509_INFO_num(ret); 120 121 if ((xi = X509_INFO_new()) == NULL) 122 goto err; 123 for (;;) { 124 raw = 0; 125 ptype = 0; 126 if (!PEM_read_bio(bp, &name, &header, &data, &len)) { 127 if (ERR_GET_REASON(ERR_peek_last_error()) == 128 PEM_R_NO_START_LINE) { 129 ERR_clear_error(); 130 break; 131 } 132 goto err; 133 } 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 } 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 } 152 pp = &(xi->x509); 153 } else if (strcmp(name, PEM_STRING_X509_CRL) == 0) { 154 d2i = (D2I_OF(void))d2i_X509_CRL; 155 if (xi->crl != NULL) { 156 if (!sk_X509_INFO_push(ret, xi)) 157 goto err; 158 if ((xi = X509_INFO_new()) == NULL) 159 goto err; 160 } 161 pp = &(xi->crl); 162 } else 163#ifndef OPENSSL_NO_RSA 164 if (strcmp(name, PEM_STRING_RSA) == 0) { 165 d2i = (D2I_OF(void))d2i_RSAPrivateKey; 166 if (xi->x_pkey != NULL) { 167 if (!sk_X509_INFO_push(ret, xi)) 168 goto err; 169 if ((xi = X509_INFO_new()) == NULL) 170 goto err; 171 } 172 xi->enc_data = NULL; 173 xi->enc_len = 0; 174 xi->x_pkey = X509_PKEY_new(); 175 if (xi->x_pkey == NULL) 176 goto err; 177 ptype = EVP_PKEY_RSA; 178 pp = &xi->x_pkey->dec_pkey; 179 if (strlen(header) > 10) /* assume encrypted */ 180 raw = 1; 181 } else 182#endif 183#ifndef OPENSSL_NO_DSA 184 if (strcmp(name, PEM_STRING_DSA) == 0) { 185 d2i = (D2I_OF(void))d2i_DSAPrivateKey; 186 if (xi->x_pkey != NULL) { 187 if (!sk_X509_INFO_push(ret, xi)) 188 goto err; 189 if ((xi = X509_INFO_new()) == NULL) 190 goto err; 191 } 192 xi->enc_data = NULL; 193 xi->enc_len = 0; 194 xi->x_pkey = X509_PKEY_new(); 195 if (xi->x_pkey == NULL) 196 goto err; 197 ptype = EVP_PKEY_DSA; 198 pp = &xi->x_pkey->dec_pkey; 199 if (strlen(header) > 10) /* assume encrypted */ 200 raw = 1; 201 } else 202#endif 203#ifndef OPENSSL_NO_EC 204 if (strcmp(name, PEM_STRING_ECPRIVATEKEY) == 0) { 205 d2i = (D2I_OF(void))d2i_ECPrivateKey; 206 if (xi->x_pkey != NULL) { 207 if (!sk_X509_INFO_push(ret, xi)) 208 goto err; 209 if ((xi = X509_INFO_new()) == NULL) 210 goto err; 211 } 212 xi->enc_data = NULL; 213 xi->enc_len = 0; 214 xi->x_pkey = X509_PKEY_new(); 215 if (xi->x_pkey == NULL) 216 goto err; 217 ptype = EVP_PKEY_EC; 218 pp = &xi->x_pkey->dec_pkey; 219 if (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, 239 len)) { 240 PEMerror(ERR_R_ASN1_LIB); 241 goto err; 242 } 243 } else if (d2i(pp, &p, len) == NULL) { 244 PEMerror(ERR_R_ASN1_LIB); 245 goto err; 246 } 247 } else { /* encrypted RSA data */ 248 if (!PEM_get_EVP_CIPHER_INFO(header, 249 &xi->enc_cipher)) 250 goto err; 251 xi->enc_data = (char *)data; 252 xi->enc_len = (int)len; 253 data = NULL; 254 } 255 } else { 256 /* unknown */ 257 } 258 free(name); 259 free(header); 260 free(data); 261 name = NULL; 262 header = NULL; 263 data = NULL; 264 } 265 266 /* if the last one hasn't been pushed yet and there is anything 267 * in it then add it to the stack ... 268 */ 269 if ((xi->x509 != NULL) || (xi->crl != NULL) || 270 (xi->x_pkey != NULL) || (xi->enc_data != NULL)) { 271 if (!sk_X509_INFO_push(ret, xi)) 272 goto err; 273 xi = NULL; 274 } 275 ok = 1; 276 277err: 278 if (!ok) { 279 while (sk_X509_INFO_num(ret) > num_in) 280 X509_INFO_free(sk_X509_INFO_pop(ret)); 281 if (ret != sk) 282 sk_X509_INFO_free(ret); 283 ret = NULL; 284 } 285 X509_INFO_free(xi); 286 free(name); 287 free(header); 288 free(data); 289 290 return ret; 291} 292LCRYPTO_ALIAS(PEM_X509_INFO_read_bio); 293 294 295/* A TJH addition */ 296int 297PEM_X509_INFO_write_bio(BIO *bp, X509_INFO *xi, EVP_CIPHER *enc, 298 unsigned char *kstr, int klen, pem_password_cb *cb, void *u) 299{ 300 EVP_CIPHER_CTX ctx; 301 int i, ret = 0; 302 unsigned char *data = NULL; 303 const char *objstr = NULL; 304 char buf[PEM_BUFSIZE]; 305 unsigned char *iv = NULL; 306 307 if (enc != NULL) { 308 objstr = OBJ_nid2sn(EVP_CIPHER_nid(enc)); 309 if (objstr == NULL) { 310 PEMerror(PEM_R_UNSUPPORTED_CIPHER); 311 goto err; 312 } 313 } 314 315 /* now for the fun part ... if we have a private key then 316 * we have to be able to handle a not-yet-decrypted key 317 * being written out correctly ... if it is decrypted or 318 * it is non-encrypted then we use the base code 319 */ 320 if (xi->x_pkey != NULL) { 321 if ((xi->enc_data != NULL) && (xi->enc_len > 0) ) { 322 if (enc == NULL) { 323 PEMerror(PEM_R_CIPHER_IS_NULL); 324 goto err; 325 } 326 327 /* copy from weirdo names into more normal things */ 328 iv = xi->enc_cipher.iv; 329 data = (unsigned char *)xi->enc_data; 330 i = xi->enc_len; 331 332 /* we take the encryption data from the 333 * internal stuff rather than what the 334 * user has passed us ... as we have to 335 * match exactly for some strange reason 336 */ 337 objstr = OBJ_nid2sn( 338 EVP_CIPHER_nid(xi->enc_cipher.cipher)); 339 if (objstr == NULL) { 340 PEMerror(PEM_R_UNSUPPORTED_CIPHER); 341 goto err; 342 } 343 344 /* create the right magic header stuff */ 345 if (strlen(objstr) + 23 + 2 * enc->iv_len + 13 > 346 sizeof buf) { 347 PEMerror(ASN1_R_BUFFER_TOO_SMALL); 348 goto err; 349 } 350 buf[0] = '\0'; 351 PEM_proc_type(buf, PEM_TYPE_ENCRYPTED); 352 PEM_dek_info(buf, objstr, enc->iv_len, (char *)iv); 353 354 /* use the normal code to write things out */ 355 i = PEM_write_bio(bp, PEM_STRING_RSA, buf, data, i); 356 if (i <= 0) 357 goto err; 358 } else { 359 /* Add DSA/DH */ 360#ifndef OPENSSL_NO_RSA 361 /* normal optionally encrypted stuff */ 362 if (PEM_write_bio_RSAPrivateKey(bp, 363 xi->x_pkey->dec_pkey->pkey.rsa, 364 enc, kstr, klen, cb, u) <= 0) 365 goto err; 366#endif 367 } 368 } 369 370 /* if we have a certificate then write it out now */ 371 if ((xi->x509 != NULL) && (PEM_write_bio_X509(bp, xi->x509) <= 0)) 372 goto err; 373 374 /* we are ignoring anything else that is loaded into the X509_INFO 375 * structure for the moment ... as I don't need it so I'm not 376 * coding it here and Eric can do it when this makes it into the 377 * base library --tjh 378 */ 379 380 ret = 1; 381 382err: 383 explicit_bzero((char *)&ctx, sizeof(ctx)); 384 explicit_bzero(buf, PEM_BUFSIZE); 385 return (ret); 386} 387LCRYPTO_ALIAS(PEM_X509_INFO_write_bio); 388