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 "buffer.h"
  62 #include "objects.h"
  63 #include "evp.h"
  64 #include "x509.h"
  65 #include "pem.h"
  66
  67 #ifndef NO_FP_API
  68 STACK *PEM_X509_INFO_read(fp,sk,cb)
  69 FILE *fp;
  70 STACK *sk;
  71 int (*cb)();
  72         {
  73         BIO *b;
  74         STACK *ret;
  75
  76         if ((b=BIO_new(BIO_s_file())) == NULL)
  77                 {
  78                 PEMerr(PEM_F_PEM_X509_INFO_READ,ERR_R_BUF_LIB);
  79                 return(0);
  80                 }
  81         BIO_set_fp(b,fp,BIO_NOCLOSE);
  82         ret=PEM_X509_INFO_read_bio(b,sk,cb);
  83         BIO_free(b);
  84         return(ret);
  85         }
  86 #endif
  87
  88 STACK *PEM_X509_INFO_read_bio(bp,sk,cb)
  89 BIO *bp;
  90 STACK *sk;
  91 int (*cb)();
  92         {
  93         X509_INFO *xi=NULL;
  94         char *name=NULL,*header=NULL,**pp;
  95         unsigned char *data=NULL,*p;
  96         long len,error=0;
  97         int ok=0;
  98         STACK *ret=NULL;
  99         unsigned int i,raw;
 100         char *(*d2i)();
 101
 102         if (sk == NULL)
 103                 {
 104                 if ((ret=sk_new_null()) == NULL)
 105                         {
 106                         PEMerr(PEM_F_PEM_X509_INFO_READ_BIO,ERR_R_MALLOC_FAILURE);
 107                         goto err;
 108                         }
 109                 }
 110         else
 111                 ret=sk;
 112
 113         if ((xi=X509_INFO_new()) == NULL) goto err;
 114         for (;;)
 115                 {
 116                 raw=0;
 117                 i=PEM_read_bio(bp,&name,&header,&data,&len);
 118                 if (i == 0)
 119                         {
 120                         error=ERR_GET_REASON(ERR_peek_error());
 121                         if (error == PEM_R_NO_START_LINE)
 122                                 {
 123                                 ERR_clear_error();
 124                                 break;
 125                                 }
 126                         goto err;
 127                         }
 128 start:
 129                 if (    (strcmp(name,PEM_STRING_X509) == 0) ||
 130                         (strcmp(name,PEM_STRING_X509_OLD) == 0))
 131                         {
 132                         d2i=(char *(*)())d2i_X509;
 133                         if (xi->x509 != NULL)
 134                                 {
 135                                 if (!sk_push(ret,(char *)xi)) goto err;
 136                                 if ((xi=X509_INFO_new()) == NULL) goto err;
 137                                 goto start;
 138                                 }
 139                         pp=(char **)&(xi->x509);
 140                         }
 141                 else if (strcmp(name,PEM_STRING_X509_CRL) == 0)
 142                         {
 143                         d2i=(char *(*)())d2i_X509_CRL;
 144                         if (xi->crl != NULL)
 145                                 {
 146                                 if (!sk_push(ret,(char *)xi)) goto err;
 147                                 if ((xi=X509_INFO_new()) == NULL) goto err;
 148                                 goto start;
 149                                 }
 150                         pp=(char **)&(xi->crl);
 151                         }
 152                 else
 153 #ifndef NO_RSA
 154                         if (strcmp(name,PEM_STRING_RSA) == 0)
 155                         {
 156                         d2i=(char *(*)())d2i_RSAPrivateKey;
 157                         if (xi->x_pkey != NULL)
 158                                 {
 159                                 if (!sk_push(ret,(char *)xi)) goto err;
 160                                 if ((xi=X509_INFO_new()) == NULL) goto err;
 161                                 goto start;
 162                                 }
 163
 164                         xi->enc_data=NULL;
 165                         xi->enc_len=0;
 166
 167                         xi->x_pkey=X509_PKEY_new();
 168                         if ((xi->x_pkey->dec_pkey=EVP_PKEY_new()) == NULL)
 169                                 goto err;
 170                         xi->x_pkey->dec_pkey->type=EVP_PKEY_RSA;
 171                         pp=(char **)&(xi->x_pkey->dec_pkey->pkey.rsa);
 172                         if ((int)strlen(header) > 10) /* assume encrypted */
 173                                 raw=1;
 174                         }
 175                 else
 176 #endif
 177 #ifndef NO_DSA
 178                         if (strcmp(name,PEM_STRING_DSA) == 0)
 179                         {
 180                         d2i=(char *(*)())d2i_DSAPrivateKey;
 181                         if (xi->x_pkey != NULL)
 182                                 {
 183                                 if (!sk_push(ret,(char *)xi)) goto err;
 184                                 if ((xi=X509_INFO_new()) == NULL) goto err;
 185                                 goto start;
 186                                 }
 187
 188                         xi->enc_data=NULL;
 189                         xi->enc_len=0;
 190
 191                         xi->x_pkey=X509_PKEY_new();
 192                         if ((xi->x_pkey->dec_pkey=EVP_PKEY_new()) == NULL)
 193                                 goto err;
 194                         xi->x_pkey->dec_pkey->type=EVP_PKEY_DSA;
 195                         pp=(char **)&(xi->x_pkey->dec_pkey->pkey.dsa);
 196                         if ((int)strlen(header) > 10) /* assume encrypted */
 197                                 raw=1;
 198                         }
 199                 else
 200 #endif
 201                         {
 202                         d2i=NULL;
 203                         pp=NULL;
 204                         }
 205
 206                 if (d2i != NULL)
 207                         {
 208                         if (!raw)
 209                                 {
 210                                 EVP_CIPHER_INFO cipher;
 211
 212                                 if (!PEM_get_EVP_CIPHER_INFO(header,&cipher))
 213                                         goto err;
 214                                 if (!PEM_do_header(&cipher,data,&len,cb))
 215                                         goto err;
 216                                 p=data;
 217                                 if (d2i(pp,&p,len) == NULL)
 218                                         {
 219                                         PEMerr(PEM_F_PEM_X509_INFO_READ_BIO,ERR_R_ASN1_LIB);
 220                                         goto err;
 221                                         }
 222                                 }
 223                         else
 224                                 { /* encrypted RSA data */
 225                                 if (!PEM_get_EVP_CIPHER_INFO(header,
 226                                         &xi->enc_cipher)) goto err;
 227                                 xi->enc_data=(char *)data;
 228                                 xi->enc_len=(int)len;
 229                                 data=NULL;
 230                                 }
 231                         }
 232                 else    {
 233                         /* unknown */
 234                         }
 235                 if (name != NULL) Free(name);
 236                 if (header != NULL) Free(header);
 237                 if (data != NULL) Free(data);
 238                 name=NULL;
 239                 header=NULL;
 240                 data=NULL;
 241                 }
 242
 243         /* if the last one hasn't been pushed yet and there is anything
 244          * in it then add it to the stack ...
 245          */
 246         if ((xi->x509 != NULL) || (xi->crl != NULL) ||
 247                 (xi->x_pkey != NULL) || (xi->enc_data != NULL))
 248                 {
 249                 if (!sk_push(ret,(char *)xi)) goto err;
 250                 xi=NULL;
 251                 }
 252         ok=1;
 253 err:
 254         if (xi != NULL) X509_INFO_free(xi);
 255         if (!ok)
 256                 {
 257                 for (i=0; ((int)i)<sk_num(ret); i++)
 258                         {
 259                         xi=(X509_INFO *)sk_value(ret,i);
 260                         X509_INFO_free(xi);
 261                         }
 262                 if (ret != sk) sk_free(ret);
 263                 ret=NULL;
 264                 }
 265
 266         if (name != NULL) Free(name);
 267         if (header != NULL) Free(header);
 268         if (data != NULL) Free(data);
 269         return(ret);
 270         }
 271
 272
 273 /* A TJH addition */
 274 int PEM_X509_INFO_write_bio(bp,xi,enc,kstr,klen,cb)
 275 BIO *bp;
 276 X509_INFO *xi;
 277 EVP_CIPHER *enc;
 278 unsigned char *kstr;
 279 int klen;
 280 int (*cb)();
 281         {
 282         EVP_CIPHER_CTX ctx;
 283         int i,ret=0;
 284         unsigned char *data=NULL;
 285         char *objstr=NULL;
 286 #define PEM_BUFSIZE     1024
 287         char buf[PEM_BUFSIZE];
 288         unsigned char *iv=NULL;
 289
 290         if (enc != NULL)
 291                 {
 292                 objstr=OBJ_nid2sn(EVP_CIPHER_nid(enc));
 293                 if (objstr == NULL)
 294                         {
 295                         PEMerr(PEM_F_PEM_X509_INFO_WRITE_BIO,PEM_R_UNSUPPORTED_CIPHER);
 296                         goto err;
 297                         }
 298                 }
 299
 300         /* now for the fun part ... if we have a private key then
 301          * we have to be able to handle a not-yet-decrypted key
 302          * being written out correctly ... if it is decrypted or
 303          * it is non-encrypted then we use the base code
 304          */
 305         if (xi->x_pkey!=NULL)
 306                 {
 307                 if ( (xi->enc_data!=NULL) && (xi->enc_len>0) )
 308                         {
 309                         /* copy from wierdo names into more normal things */
 310                         iv=xi->enc_cipher.iv;
 311                         data=(unsigned char *)xi->enc_data;
 312                         i=xi->enc_len;
 313
 314                         /* we take the encryption data from the
 315                          * internal stuff rather than what the
 316                          * user has passed us ... as we have to
 317                          * match exactly for some strange reason
 318                          */
 319                         objstr=OBJ_nid2sn(
 320                                 EVP_CIPHER_nid(xi->enc_cipher.cipher));
 321                         if (objstr == NULL)
 322                                 {
 323                                 PEMerr(PEM_F_PEM_X509_INFO_WRITE_BIO,PEM_R_UNSUPPORTED_CIPHER);
 324                                 goto err;
 325                                 }
 326
 327                         /* create the right magic header stuff */
 328                         buf[0]='\0';
 329                         PEM_proc_type(buf,PEM_TYPE_ENCRYPTED);
 330                         PEM_dek_info(buf,objstr,8,(char *)iv);
 331
 332                         /* use the normal code to write things out */
 333                         i=PEM_write_bio(bp,PEM_STRING_RSA,buf,data,i);
 334                         if (i <= 0) goto err;
 335                         }
 336                 else
 337                         {
 338                         /* Add DSA/DH */
 339 #ifndef NO_RSA
 340                         /* normal optionally encrypted stuff */
 341                         if (PEM_write_bio_RSAPrivateKey(bp,
 342                                 xi->x_pkey->dec_pkey->pkey.rsa,
 343                                 enc,kstr,klen,cb)<=0)
 344                                 goto err;
 345 #endif
 346                         }
 347                 }
 348
 349         /* if we have a certificate then write it out now */
 350         if ((xi->x509 != NULL) || (PEM_write_bio_X509(bp,xi->x509) <= 0))
 351                 goto err;
 352
 353         /* we are ignoring anything else that is loaded into the X509_INFO
 354          * structure for the moment ... as I don't need it so I'm not
 355          * coding it here and Eric can do it when this makes it into the
 356          * base library --tjh
 357          */
 358
 359         ret=1;
 360
 361 err:
 362         memset((char *)&ctx,0,sizeof(ctx));
 363         memset(buf,0,PEM_BUFSIZE);
 364         return(ret);
 365         }