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
  67 #ifndef OPENSSL_NO_FP_API
  68 STACK_OF(X509_INFO) *PEM_X509_INFO_read(FILE *fp, STACK_OF(X509_INFO) *sk, pem_password_cb *cb, void *u)
  69         {
  70         BIO *b;
  71         STACK_OF(X509_INFO) *ret;
  72
  73         if ((b=BIO_new(BIO_s_file())) == NULL)
  74                 {
  75                 PEMerr(PEM_F_PEM_X509_INFO_READ,ERR_R_BUF_LIB);
  76                 return(0);
  77                 }
  78         BIO_set_fp(b,fp,BIO_NOCLOSE);
  79         ret=PEM_X509_INFO_read_bio(b,sk,cb,u);
  80         BIO_free(b);
  81         return(ret);
  82         }
  83 #endif
  84
  85 STACK_OF(X509_INFO) *PEM_X509_INFO_read_bio(BIO *bp, STACK_OF(X509_INFO) *sk, pem_password_cb *cb, void *u)
  86         {
  87         X509_INFO *xi=NULL;
  88         char *name=NULL,*header=NULL,**pp;
  89         unsigned char *data=NULL,*p;
  90         long len,error=0;
  91         int ok=0;
  92         STACK_OF(X509_INFO) *ret=NULL;
  93         unsigned int i,raw;
  94         char *(*d2i)();
  95
  96         if (sk == NULL)
  97                 {
  98                 if ((ret=sk_X509_INFO_new_null()) == NULL)
  99                         {
 100                         PEMerr(PEM_F_PEM_X509_INFO_READ_BIO,ERR_R_MALLOC_FAILURE);
 101                         goto err;
 102                         }
 103                 }
 104         else
 105                 ret=sk;
 106
 107         if ((xi=X509_INFO_new()) == NULL) goto err;
 108         for (;;)
 109                 {
 110                 raw=0;
 111                 i=PEM_read_bio(bp,&name,&header,&data,&len);
 112                 if (i == 0)
 113                         {
 114                         error=ERR_GET_REASON(ERR_peek_error());
 115                         if (error == PEM_R_NO_START_LINE)
 116                                 {
 117                                 ERR_clear_error();
 118                                 break;
 119                                 }
 120                         goto err;
 121                         }
 122 start:
 123                 if (    (strcmp(name,PEM_STRING_X509) == 0) ||
 124                         (strcmp(name,PEM_STRING_X509_OLD) == 0))
 125                         {
 126                         d2i=(char *(*)())d2i_X509;
 127                         if (xi->x509 != NULL)
 128                                 {
 129                                 if (!sk_X509_INFO_push(ret,xi)) goto err;
 130                                 if ((xi=X509_INFO_new()) == NULL) goto err;
 131                                 goto start;
 132                                 }
 133                         pp=(char **)&(xi->x509);
 134                         }
 135                 else if ((strcmp(name,PEM_STRING_X509_TRUSTED) == 0))
 136                         {
 137                         d2i=(char *(*)())d2i_X509_AUX;
 138                         if (xi->x509 != NULL)
 139                                 {
 140                                 if (!sk_X509_INFO_push(ret,xi)) goto err;
 141                                 if ((xi=X509_INFO_new()) == NULL) goto err;
 142                                 goto start;
 143                                 }
 144                         pp=(char **)&(xi->x509);
 145                         }
 146                 else if (strcmp(name,PEM_STRING_X509_CRL) == 0)
 147                         {
 148                         d2i=(char *(*)())d2i_X509_CRL;
 149                         if (xi->crl != NULL)
 150                                 {
 151                                 if (!sk_X509_INFO_push(ret,xi)) goto err;
 152                                 if ((xi=X509_INFO_new()) == NULL) goto err;
 153                                 goto start;
 154                                 }
 155                         pp=(char **)&(xi->crl);
 156                         }
 157                 else
 158 #ifndef OPENSSL_NO_RSA
 159                         if (strcmp(name,PEM_STRING_RSA) == 0)
 160                         {
 161                         d2i=(char *(*)())d2i_RSAPrivateKey;
 162                         if (xi->x_pkey != NULL)
 163                                 {
 164                                 if (!sk_X509_INFO_push(ret,xi)) goto err;
 165                                 if ((xi=X509_INFO_new()) == NULL) goto err;
 166                                 goto start;
 167                                 }
 168
 169                         xi->enc_data=NULL;
 170                         xi->enc_len=0;
 171
 172                         xi->x_pkey=X509_PKEY_new();
 173                         if ((xi->x_pkey->dec_pkey=EVP_PKEY_new()) == NULL)
 174                                 goto err;
 175                         xi->x_pkey->dec_pkey->type=EVP_PKEY_RSA;
 176                         pp=(char **)&(xi->x_pkey->dec_pkey->pkey.rsa);
 177                         if ((int)strlen(header) > 10) /* assume encrypted */
 178                                 raw=1;
 179                         }
 180                 else
 181 #endif
 182 #ifndef OPENSSL_NO_DSA
 183                         if (strcmp(name,PEM_STRING_DSA) == 0)
 184                         {
 185                         d2i=(char *(*)())d2i_DSAPrivateKey;
 186                         if (xi->x_pkey != NULL)
 187                                 {
 188                                 if (!sk_X509_INFO_push(ret,xi)) goto err;
 189                                 if ((xi=X509_INFO_new()) == NULL) goto err;
 190                                 goto start;
 191                                 }
 192
 193                         xi->enc_data=NULL;
 194                         xi->enc_len=0;
 195
 196                         xi->x_pkey=X509_PKEY_new();
 197                         if ((xi->x_pkey->dec_pkey=EVP_PKEY_new()) == NULL)
 198                                 goto err;
 199                         xi->x_pkey->dec_pkey->type=EVP_PKEY_DSA;
 200                         pp=(char **)&(xi->x_pkey->dec_pkey->pkey.dsa);
 201                         if ((int)strlen(header) > 10) /* assume encrypted */
 202                                 raw=1;
 203                         }
 204                 else
 205 #endif
 206                         {
 207                         d2i=NULL;
 208                         pp=NULL;
 209                         }
 210
 211                 if (d2i != NULL)
 212                         {
 213                         if (!raw)
 214                                 {
 215                                 EVP_CIPHER_INFO cipher;
 216
 217                                 if (!PEM_get_EVP_CIPHER_INFO(header,&cipher))
 218                                         goto err;
 219                                 if (!PEM_do_header(&cipher,data,&len,cb,u))
 220                                         goto err;
 221                                 p=data;
 222                                 if (d2i(pp,&p,len) == NULL)
 223                                         {
 224                                         PEMerr(PEM_F_PEM_X509_INFO_READ_BIO,ERR_R_ASN1_LIB);
 225                                         goto err;
 226                                         }
 227                                 }
 228                         else
 229                                 { /* encrypted RSA data */
 230                                 if (!PEM_get_EVP_CIPHER_INFO(header,
 231                                         &xi->enc_cipher)) goto err;
 232                                 xi->enc_data=(char *)data;
 233                                 xi->enc_len=(int)len;
 234                                 data=NULL;
 235                                 }
 236                         }
 237                 else    {
 238                         /* unknown */
 239                         }
 240                 if (name != NULL) OPENSSL_free(name);
 241                 if (header != NULL) OPENSSL_free(header);
 242                 if (data != NULL) OPENSSL_free(data);
 243                 name=NULL;
 244                 header=NULL;
 245                 data=NULL;
 246                 }
 247
 248         /* if the last one hasn't been pushed yet and there is anything
 249          * in it then add it to the stack ...
 250          */
 251         if ((xi->x509 != NULL) || (xi->crl != NULL) ||
 252                 (xi->x_pkey != NULL) || (xi->enc_data != NULL))
 253                 {
 254                 if (!sk_X509_INFO_push(ret,xi)) goto err;
 255                 xi=NULL;
 256                 }
 257         ok=1;
 258 err:
 259         if (xi != NULL) X509_INFO_free(xi);
 260         if (!ok)
 261                 {
 262                 for (i=0; ((int)i)<sk_X509_INFO_num(ret); i++)
 263                         {
 264                         xi=sk_X509_INFO_value(ret,i);
 265                         X509_INFO_free(xi);
 266                         }
 267                 if (ret != sk) sk_X509_INFO_free(ret);
 268                 ret=NULL;
 269                 }
 270
 271         if (name != NULL) OPENSSL_free(name);
 272         if (header != NULL) OPENSSL_free(header);
 273         if (data != NULL) OPENSSL_free(data);
 274         return(ret);
 275         }
 276
 277
 278 /* A TJH addition */
 279 int PEM_X509_INFO_write_bio(BIO *bp, X509_INFO *xi, EVP_CIPHER *enc,
 280              unsigned char *kstr, int klen, pem_password_cb *cb, void *u)
 281         {
 282         EVP_CIPHER_CTX ctx;
 283         int i,ret=0;
 284         unsigned char *data=NULL;
 285         const char *objstr=NULL;
 286         char buf[PEM_BUFSIZE];
 287         unsigned char *iv=NULL;
 288
 289         if (enc != NULL)
 290                 {
 291                 objstr=OBJ_nid2sn(EVP_CIPHER_nid(enc));
 292                 if (objstr == NULL)
 293                         {
 294                         PEMerr(PEM_F_PEM_X509_INFO_WRITE_BIO,PEM_R_UNSUPPORTED_CIPHER);
 295                         goto err;
 296                         }
 297                 }
 298
 299         /* now for the fun part ... if we have a private key then
 300          * we have to be able to handle a not-yet-decrypted key
 301          * being written out correctly ... if it is decrypted or
 302          * it is non-encrypted then we use the base code
 303          */
 304         if (xi->x_pkey!=NULL)
 305                 {
 306                 if ( (xi->enc_data!=NULL) && (xi->enc_len>0) )
 307                         {
 308                         /* copy from weirdo names into more normal things */
 309                         iv=xi->enc_cipher.iv;
 310                         data=(unsigned char *)xi->enc_data;
 311                         i=xi->enc_len;
 312
 313                         /* we take the encryption data from the
 314                          * internal stuff rather than what the
 315                          * user has passed us ... as we have to
 316                          * match exactly for some strange reason
 317                          */
 318                         objstr=OBJ_nid2sn(
 319                                 EVP_CIPHER_nid(xi->enc_cipher.cipher));
 320                         if (objstr == NULL)
 321                                 {
 322                                 PEMerr(PEM_F_PEM_X509_INFO_WRITE_BIO,PEM_R_UNSUPPORTED_CIPHER);
 323                                 goto err;
 324                                 }
 325
 326                         /* create the right magic header stuff */
 327                         buf[0]='\0';
 328                         PEM_proc_type(buf,PEM_TYPE_ENCRYPTED);
 329                         PEM_dek_info(buf,objstr,8,(char *)iv);
 330
 331                         /* use the normal code to write things out */
 332                         i=PEM_write_bio(bp,PEM_STRING_RSA,buf,data,i);
 333                         if (i <= 0) goto err;
 334                         }
 335                 else
 336                         {
 337                         /* Add DSA/DH */
 338 #ifndef OPENSSL_NO_RSA
 339                         /* normal optionally encrypted stuff */
 340                         if (PEM_write_bio_RSAPrivateKey(bp,
 341                                 xi->x_pkey->dec_pkey->pkey.rsa,
 342                                 enc,kstr,klen,cb,u)<=0)
 343                                 goto err;
 344 #endif
 345                         }
 346                 }
 347
 348         /* if we have a certificate then write it out now */
 349         if ((xi->x509 != NULL) || (PEM_write_bio_X509(bp,xi->x509) <= 0))
 350                 goto err;
 351
 352         /* we are ignoring anything else that is loaded into the X509_INFO
 353          * structure for the moment ... as I don't need it so I'm not
 354          * coding it here and Eric can do it when this makes it into the
 355          * base library --tjh
 356          */
 357
 358         ret=1;
 359
 360 err:
 361         memset((char *)&ctx,0,sizeof(ctx));
 362         memset(buf,0,PEM_BUFSIZE);
 363         return(ret);
 364         }