crypto/pem/pem_info.c

   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 #include <openssl/rsa.h>
  67 #include <openssl/dsa.h>
  68
  69 #ifndef OPENSSL_NO_FP_API
  70 STACK_OF(X509_INFO) *PEM_X509_INFO_read(FILE *fp, STACK_OF(X509_INFO) *sk, pem_password_cb *cb, void *u)
  71         {
  72         BIO *b;
  73         STACK_OF(X509_INFO) *ret;
  74
  75         if ((b=BIO_new(BIO_s_file())) == NULL)
  76                 {
  77                 PEMerr(PEM_F_PEM_X509_INFO_READ,ERR_R_BUF_LIB);
  78                 return(0);
  79                 }
  80         BIO_set_fp(b,fp,BIO_NOCLOSE);
  81         ret=PEM_X509_INFO_read_bio(b,sk,cb,u);
  82         BIO_free(b);
  83         return(ret);
  84         }
  85 #endif
  86
  87 STACK_OF(X509_INFO) *PEM_X509_INFO_read_bio(BIO *bp, STACK_OF(X509_INFO) *sk, pem_password_cb *cb, void *u)
  88         {
  89         X509_INFO *xi=NULL;
  90         char *name=NULL,*header=NULL,**pp;
  91         unsigned char *data=NULL,*p;
  92         long len,error=0;
  93         int ok=0;
  94         STACK_OF(X509_INFO) *ret=NULL;
  95         unsigned int i,raw;
  96         char *(*d2i)();
  97
  98         if (sk == NULL)
  99                 {
 100                 if ((ret=sk_X509_INFO_new_null()) == NULL)
 101                         {
 102                         PEMerr(PEM_F_PEM_X509_INFO_READ_BIO,ERR_R_MALLOC_FAILURE);
 103                         goto err;
 104                         }
 105                 }
 106         else
 107                 ret=sk;
 108
 109         if ((xi=X509_INFO_new()) == NULL) goto err;
 110         for (;;)
 111                 {
 112                 raw=0;
 113                 i=PEM_read_bio(bp,&name,&header,&data,&len);
 114                 if (i == 0)
 115                         {
 116                         error=ERR_GET_REASON(ERR_peek_last_error());
 117                         if (error == PEM_R_NO_START_LINE)
 118                                 {
 119                                 ERR_clear_error();
 120                                 break;
 121                                 }
 122                         goto err;
 123                         }
 124 start:
 125                 if (    (strcmp(name,PEM_STRING_X509) == 0) ||
 126                         (strcmp(name,PEM_STRING_X509_OLD) == 0))
 127                         {
 128                         d2i=(char *(*)())d2i_X509;
 129                         if (xi->x509 != NULL)
 130                                 {
 131                                 if (!sk_X509_INFO_push(ret,xi)) goto err;
 132                                 if ((xi=X509_INFO_new()) == NULL) goto err;
 133                                 goto start;
 134                                 }
 135                         pp=(char **)&(xi->x509);
 136                         }
 137                 else if ((strcmp(name,PEM_STRING_X509_TRUSTED) == 0))
 138                         {
 139                         d2i=(char *(*)())d2i_X509_AUX;
 140                         if (xi->x509 != NULL)
 141                                 {
 142                                 if (!sk_X509_INFO_push(ret,xi)) goto err;
 143                                 if ((xi=X509_INFO_new()) == NULL) goto err;
 144                                 goto start;
 145                                 }
 146                         pp=(char **)&(xi->x509);
 147                         }
 148                 else if (strcmp(name,PEM_STRING_X509_CRL) == 0)
 149                         {
 150                         d2i=(char *(*)())d2i_X509_CRL;
 151                         if (xi->crl != NULL)
 152                                 {
 153                                 if (!sk_X509_INFO_push(ret,xi)) goto err;
 154                                 if ((xi=X509_INFO_new()) == NULL) goto err;
 155                                 goto start;
 156                                 }
 157                         pp=(char **)&(xi->crl);
 158                         }
 159                 else
 160 #ifndef OPENSSL_NO_RSA
 161                         if (strcmp(name,PEM_STRING_RSA) == 0)
 162                         {
 163                         d2i=(char *(*)())d2i_RSAPrivateKey;
 164                         if (xi->x_pkey != NULL)
 165                                 {
 166                                 if (!sk_X509_INFO_push(ret,xi)) goto err;
 167                                 if ((xi=X509_INFO_new()) == NULL) 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                         if ((xi->x_pkey->dec_pkey=EVP_PKEY_new()) == NULL)
 176                                 goto err;
 177                         xi->x_pkey->dec_pkey->type=EVP_PKEY_RSA;
 178                         pp=(char **)&(xi->x_pkey->dec_pkey->pkey.rsa);
 179                         if ((int)strlen(header) > 10) /* assume encrypted */
 180                                 raw=1;
 181                         }
 182                 else
 183 #endif
 184 #ifndef OPENSSL_NO_DSA
 185                         if (strcmp(name,PEM_STRING_DSA) == 0)
 186                         {
 187                         d2i=(char *(*)())d2i_DSAPrivateKey;
 188                         if (xi->x_pkey != NULL)
 189                                 {
 190                                 if (!sk_X509_INFO_push(ret,xi)) goto err;
 191                                 if ((xi=X509_INFO_new()) == NULL) goto err;
 192                                 goto start;
 193                                 }
 194
 195                         xi->enc_data=NULL;
 196                         xi->enc_len=0;
 197
 198                         xi->x_pkey=X509_PKEY_new();
 199                         if ((xi->x_pkey->dec_pkey=EVP_PKEY_new()) == NULL)
 200                                 goto err;
 201                         xi->x_pkey->dec_pkey->type=EVP_PKEY_DSA;
 202                         pp=(char **)&(xi->x_pkey->dec_pkey->pkey.dsa);
 203                         if ((int)strlen(header) > 10) /* assume encrypted */
 204                                 raw=1;
 205                         }
 206                 else
 207 #endif
 208 #ifndef OPENSSL_NO_EC
 209                         if (strcmp(name,PEM_STRING_ECPRIVATEKEY) == 0)
 210                         {
 211                                 d2i=(char *(*)())d2i_ECPrivateKey;
 212                                 if (xi->x_pkey != NULL)
 213                                 {
 214                                         if (!sk_X509_INFO_push(ret,xi)) goto err;
 215                                         if ((xi=X509_INFO_new()) == NULL) goto err;
 216                                                 goto start;
 217                                 }
 218
 219                         xi->enc_data=NULL;
 220                         xi->enc_len=0;
 221
 222                         xi->x_pkey=X509_PKEY_new();
 223                         if ((xi->x_pkey->dec_pkey=EVP_PKEY_new()) == NULL)
 224                                 goto err;
 225                         xi->x_pkey->dec_pkey->type=EVP_PKEY_EC;
 226                         pp=(char **)&(xi->x_pkey->dec_pkey->pkey.eckey);
 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 (d2i(pp,&p,len) == NULL)
 249                                         {
 250                                         PEMerr(PEM_F_PEM_X509_INFO_READ_BIO,ERR_R_ASN1_LIB);
 251                                         goto err;
 252                                         }
 253                                 }
 254                         else
 255                                 { /* encrypted RSA data */
 256                                 if (!PEM_get_EVP_CIPHER_INFO(header,
 257                                         &xi->enc_cipher)) goto err;
 258                                 xi->enc_data=(char *)data;
 259                                 xi->enc_len=(int)len;
 260                                 data=NULL;
 261                                 }
 262                         }
 263                 else    {
 264                         /* unknown */
 265                         }
 266                 if (name != NULL) OPENSSL_free(name);
 267                 if (header != NULL) OPENSSL_free(header);
 268                 if (data != NULL) OPENSSL_free(data);
 269                 name=NULL;
 270                 header=NULL;
 271                 data=NULL;
 272                 }
 273
 274         /* if the last one hasn't been pushed yet and there is anything
 275          * in it then add it to the stack ...
 276          */
 277         if ((xi->x509 != NULL) || (xi->crl != NULL) ||
 278                 (xi->x_pkey != NULL) || (xi->enc_data != NULL))
 279                 {
 280                 if (!sk_X509_INFO_push(ret,xi)) goto err;
 281                 xi=NULL;
 282                 }
 283         ok=1;
 284 err:
 285         if (xi != NULL) X509_INFO_free(xi);
 286         if (!ok)
 287                 {
 288                 for (i=0; ((int)i)<sk_X509_INFO_num(ret); i++)
 289                         {
 290                         xi=sk_X509_INFO_value(ret,i);
 291                         X509_INFO_free(xi);
 292                         }
 293                 if (ret != sk) sk_X509_INFO_free(ret);
 294                 ret=NULL;
 295                 }
 296
 297         if (name != NULL) OPENSSL_free(name);
 298         if (header != NULL) OPENSSL_free(header);
 299         if (data != NULL) OPENSSL_free(data);
 300         return(ret);
 301         }
 302
 303
 304 /* A TJH addition */
 305 int PEM_X509_INFO_write_bio(BIO *bp, X509_INFO *xi, EVP_CIPHER *enc,
 306              unsigned char *kstr, int klen, pem_password_cb *cb, void *u)
 307         {
 308         EVP_CIPHER_CTX ctx;
 309         int i,ret=0;
 310         unsigned char *data=NULL;
 311         const char *objstr=NULL;
 312         char buf[PEM_BUFSIZE];
 313         unsigned char *iv=NULL;
 314
 315         if (enc != NULL)
 316                 {
 317                 objstr=OBJ_nid2sn(EVP_CIPHER_nid(enc));
 318                 if (objstr == NULL)
 319                         {
 320                         PEMerr(PEM_F_PEM_X509_INFO_WRITE_BIO,PEM_R_UNSUPPORTED_CIPHER);
 321                         goto err;
 322                         }
 323                 }
 324
 325         /* now for the fun part ... if we have a private key then
 326          * we have to be able to handle a not-yet-decrypted key
 327          * being written out correctly ... if it is decrypted or
 328          * it is non-encrypted then we use the base code
 329          */
 330         if (xi->x_pkey!=NULL)
 331                 {
 332                 if ( (xi->enc_data!=NULL) && (xi->enc_len>0) )
 333                         {
 334                         /* copy from weirdo names into more normal things */
 335                         iv=xi->enc_cipher.iv;
 336                         data=(unsigned char *)xi->enc_data;
 337                         i=xi->enc_len;
 338
 339                         /* we take the encryption data from the
 340                          * internal stuff rather than what the
 341                          * user has passed us ... as we have to
 342                          * match exactly for some strange reason
 343                          */
 344                         objstr=OBJ_nid2sn(
 345                                 EVP_CIPHER_nid(xi->enc_cipher.cipher));
 346                         if (objstr == NULL)
 347                                 {
 348                                 PEMerr(PEM_F_PEM_X509_INFO_WRITE_BIO,PEM_R_UNSUPPORTED_CIPHER);
 349                                 goto err;
 350                                 }
 351
 352                         /* create the right magic header stuff */
 353                         OPENSSL_assert(strlen(objstr)+23+2*enc->iv_len+13 <= sizeof buf);
 354                         buf[0]='\0';
 355                         PEM_proc_type(buf,PEM_TYPE_ENCRYPTED);
 356                         PEM_dek_info(buf,objstr,enc->iv_len,(char *)iv);
 357
 358                         /* use the normal code to write things out */
 359                         i=PEM_write_bio(bp,PEM_STRING_RSA,buf,data,i);
 360                         if (i <= 0) goto err;
 361                         }
 362                 else
 363                         {
 364                         /* Add DSA/DH */
 365 #ifndef OPENSSL_NO_RSA
 366                         /* normal optionally encrypted stuff */
 367                         if (PEM_write_bio_RSAPrivateKey(bp,
 368                                 xi->x_pkey->dec_pkey->pkey.rsa,
 369                                 enc,kstr,klen,cb,u)<=0)
 370                                 goto err;
 371 #endif
 372                         }
 373                 }
 374
 375         /* if we have a certificate then write it out now */
 376         if ((xi->x509 != NULL) && (PEM_write_bio_X509(bp,xi->x509) <= 0))
 377                 goto err;
 378
 379         /* we are ignoring anything else that is loaded into the X509_INFO
 380          * structure for the moment ... as I don't need it so I'm not
 381          * coding it here and Eric can do it when this makes it into the
 382          * base library --tjh
 383          */
 384
 385         ret=1;
 386
 387 err:
 388         OPENSSL_cleanse((char *)&ctx,sizeof(ctx));
 389         OPENSSL_cleanse(buf,PEM_BUFSIZE);
 390         return(ret);
 391         }