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 #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         }