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 74 STACK_OF(X509_INFO) *PEM_X509_INFO_read(FILE *fp, STACK_OF(X509_INFO) *sk, pem_password_cb *cb, void *u) 75 { 76 BIO *b; 77 STACK_OF(X509_INFO) *ret; 78 79 if ((b=BIO_new(BIO_s_file())) == NULL) 80 { 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 91 STACK_OF(X509_INFO) *PEM_X509_INFO_read_bio(BIO *bp, STACK_OF(X509_INFO) *sk, pem_password_cb *cb, void *u) 92 { 93 X509_INFO *xi=NULL; 94 char *name=NULL,*header=NULL; 95 void *pp; 96 unsigned char *data=NULL; 97 const unsigned char *p; 98 long len,error=0; 99 int ok=0; 100 STACK_OF(X509_INFO) *ret=NULL; 101 unsigned int i,raw,ptype; 102 d2i_of_void *d2i = 0; 103 104 if (sk == NULL) 105 { 106 if ((ret=sk_X509_INFO_new_null()) == NULL) 107 { 108 PEMerr(PEM_F_PEM_X509_INFO_READ_BIO,ERR_R_MALLOC_FAILURE); 109 goto err; 110 } 111 } 112 else 113 ret=sk; 114 115 if ((xi=X509_INFO_new()) == NULL) goto err; 116 for (;;) 117 { 118 raw=0; 119 ptype = 0; 120 i=PEM_read_bio(bp,&name,&header,&data,&len); 121 if (i == 0) 122 { 123 error=ERR_GET_REASON(ERR_peek_last_error()); 124 if (error == PEM_R_NO_START_LINE) 125 { 126 ERR_clear_error(); 127 break; 128 } 129 goto err; 130 } 131 start: 132 if ( (strcmp(name,PEM_STRING_X509) == 0) || 133 (strcmp(name,PEM_STRING_X509_OLD) == 0)) 134 { 135 d2i=(D2I_OF(void))d2i_X509; 136 if (xi->x509 != NULL) 137 { 138 if (!sk_X509_INFO_push(ret,xi)) goto err; 139 if ((xi=X509_INFO_new()) == NULL) goto err; 140 goto start; 141 } 142 pp=&(xi->x509); 143 } 144 else if ((strcmp(name,PEM_STRING_X509_TRUSTED) == 0)) 145 { 146 d2i=(D2I_OF(void))d2i_X509_AUX; 147 if (xi->x509 != NULL) 148 { 149 if (!sk_X509_INFO_push(ret,xi)) goto err; 150 if ((xi=X509_INFO_new()) == NULL) goto err; 151 goto start; 152 } 153 pp=&(xi->x509); 154 } 155 else if (strcmp(name,PEM_STRING_X509_CRL) == 0) 156 { 157 d2i=(D2I_OF(void))d2i_X509_CRL; 158 if (xi->crl != NULL) 159 { 160 if (!sk_X509_INFO_push(ret,xi)) goto err; 161 if ((xi=X509_INFO_new()) == NULL) goto err; 162 goto start; 163 } 164 pp=&(xi->crl); 165 } 166 else 167 #ifndef OPENSSL_NO_RSA 168 if (strcmp(name,PEM_STRING_RSA) == 0) 169 { 170 if (xi->x_pkey != NULL) 171 { 172 if (!sk_X509_INFO_push(ret,xi)) goto err; 173 if ((xi=X509_INFO_new()) == NULL) goto err; 174 goto start; 175 } 176 177 xi->enc_data=NULL; 178 xi->enc_len=0; 179 180 xi->x_pkey=X509_PKEY_new(); 181 ptype=EVP_PKEY_RSA; 182 pp=&xi->x_pkey->dec_pkey; 183 if ((int)strlen(header) > 10) /* assume encrypted */ 184 raw=1; 185 } 186 else 187 #endif 188 #ifndef OPENSSL_NO_DSA 189 if (strcmp(name,PEM_STRING_DSA) == 0) 190 { 191 d2i=(D2I_OF(void))d2i_DSAPrivateKey; 192 if (xi->x_pkey != NULL) 193 { 194 if (!sk_X509_INFO_push(ret,xi)) goto err; 195 if ((xi=X509_INFO_new()) == NULL) 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 ptype = EVP_PKEY_DSA; 204 pp=&xi->x_pkey->dec_pkey; 205 if ((int)strlen(header) > 10) /* assume encrypted */ 206 raw=1; 207 } 208 else 209 #endif 210 #ifndef OPENSSL_NO_EC 211 if (strcmp(name,PEM_STRING_ECPRIVATEKEY) == 0) 212 { 213 d2i=(D2I_OF(void))d2i_ECPrivateKey; 214 if (xi->x_pkey != NULL) 215 { 216 if (!sk_X509_INFO_push(ret,xi)) goto err; 217 if ((xi=X509_INFO_new()) == NULL) goto err; 218 goto start; 219 } 220 221 xi->enc_data=NULL; 222 xi->enc_len=0; 223 224 xi->x_pkey=X509_PKEY_new(); 225 ptype = EVP_PKEY_EC; 226 pp=&xi->x_pkey->dec_pkey; 227 if ((int)strlen(header) > 10) /* assume encrypted */ 228 raw=1; 229 } 230 else 231 #endif 232 { 233 d2i=NULL; 234 pp=NULL; 235 } 236 237 if (d2i != NULL) 238 { 239 if (!raw) 240 { 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 { 250 if (!d2i_PrivateKey(ptype, pp, &p, len)) 251 { 252 PEMerr(PEM_F_PEM_X509_INFO_READ_BIO,ERR_R_ASN1_LIB); 253 goto err; 254 } 255 } 256 else if (d2i(pp,&p,len) == NULL) 257 { 258 PEMerr(PEM_F_PEM_X509_INFO_READ_BIO,ERR_R_ASN1_LIB); 259 goto err; 260 } 261 } 262 else 263 { /* encrypted RSA data */ 264 if (!PEM_get_EVP_CIPHER_INFO(header, 265 &xi->enc_cipher)) goto err; 266 xi->enc_data=(char *)data; 267 xi->enc_len=(int)len; 268 data=NULL; 269 } 270 } 271 else { 272 /* unknown */ 273 } 274 if (name != NULL) OPENSSL_free(name); 275 if (header != NULL) OPENSSL_free(header); 276 if (data != NULL) OPENSSL_free(data); 277 name=NULL; 278 header=NULL; 279 data=NULL; 280 } 281 282 /* if the last one hasn't been pushed yet and there is anything 283 * in it then add it to the stack ... 284 */ 285 if ((xi->x509 != NULL) || (xi->crl != NULL) || 286 (xi->x_pkey != NULL) || (xi->enc_data != NULL)) 287 { 288 if (!sk_X509_INFO_push(ret,xi)) goto err; 289 xi=NULL; 290 } 291 ok=1; 292 err: 293 if (xi != NULL) X509_INFO_free(xi); 294 if (!ok) 295 { 296 for (i=0; ((int)i)<sk_X509_INFO_num(ret); i++) 297 { 298 xi=sk_X509_INFO_value(ret,i); 299 X509_INFO_free(xi); 300 } 301 if (ret != sk) sk_X509_INFO_free(ret); 302 ret=NULL; 303 } 304 305 if (name != NULL) OPENSSL_free(name); 306 if (header != NULL) OPENSSL_free(header); 307 if (data != NULL) OPENSSL_free(data); 308 return(ret); 309 } 310 311 312 /* A TJH addition */ 313 int PEM_X509_INFO_write_bio(BIO *bp, X509_INFO *xi, EVP_CIPHER *enc, 314 unsigned char *kstr, int klen, pem_password_cb *cb, void *u) 315 { 316 EVP_CIPHER_CTX ctx; 317 int i,ret=0; 318 unsigned char *data=NULL; 319 const char *objstr=NULL; 320 char buf[PEM_BUFSIZE]; 321 unsigned char *iv=NULL; 322 323 if (enc != NULL) 324 { 325 objstr=OBJ_nid2sn(EVP_CIPHER_nid(enc)); 326 if (objstr == NULL) 327 { 328 PEMerr(PEM_F_PEM_X509_INFO_WRITE_BIO,PEM_R_UNSUPPORTED_CIPHER); 329 goto err; 330 } 331 } 332 333 /* now for the fun part ... if we have a private key then 334 * we have to be able to handle a not-yet-decrypted key 335 * being written out correctly ... if it is decrypted or 336 * it is non-encrypted then we use the base code 337 */ 338 if (xi->x_pkey!=NULL) 339 { 340 if ( (xi->enc_data!=NULL) && (xi->enc_len>0) ) 341 { 342 if (enc == NULL) 343 { 344 PEMerr(PEM_F_PEM_X509_INFO_WRITE_BIO,PEM_R_CIPHER_IS_NULL); 345 goto err; 346 } 347 348 /* copy from weirdo names into more normal things */ 349 iv=xi->enc_cipher.iv; 350 data=(unsigned char *)xi->enc_data; 351 i=xi->enc_len; 352 353 /* we take the encryption data from the 354 * internal stuff rather than what the 355 * user has passed us ... as we have to 356 * match exactly for some strange reason 357 */ 358 objstr=OBJ_nid2sn( 359 EVP_CIPHER_nid(xi->enc_cipher.cipher)); 360 if (objstr == NULL) 361 { 362 PEMerr(PEM_F_PEM_X509_INFO_WRITE_BIO,PEM_R_UNSUPPORTED_CIPHER); 363 goto err; 364 } 365 366 /* create the right magic header stuff */ 367 OPENSSL_assert(strlen(objstr)+23+2*enc->iv_len+13 <= sizeof buf); 368 buf[0]='\0'; 369 PEM_proc_type(buf,PEM_TYPE_ENCRYPTED); 370 PEM_dek_info(buf,objstr,enc->iv_len,(char *)iv); 371 372 /* use the normal code to write things out */ 373 i=PEM_write_bio(bp,PEM_STRING_RSA,buf,data,i); 374 if (i <= 0) goto err; 375 } 376 else 377 { 378 /* Add DSA/DH */ 379 #ifndef OPENSSL_NO_RSA 380 /* normal optionally encrypted stuff */ 381 if (PEM_write_bio_RSAPrivateKey(bp, 382 xi->x_pkey->dec_pkey->pkey.rsa, 383 enc,kstr,klen,cb,u)<=0) 384 goto err; 385 #endif 386 } 387 } 388 389 /* if we have a certificate then write it out now */ 390 if ((xi->x509 != NULL) && (PEM_write_bio_X509(bp,xi->x509) <= 0)) 391 goto err; 392 393 /* we are ignoring anything else that is loaded into the X509_INFO 394 * structure for the moment ... as I don't need it so I'm not 395 * coding it here and Eric can do it when this makes it into the 396 * base library --tjh 397 */ 398 399 ret=1; 400 401 err: 402 OPENSSL_cleanse((char *)&ctx,sizeof(ctx)); 403 OPENSSL_cleanse(buf,PEM_BUFSIZE); 404 return(ret); 405 } 406