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;
  91         void *pp;
  92         unsigned char *data=NULL;
  93         const unsigned char *p;
  94         long len,error=0;
  95         int ok=0;
  96         STACK_OF(X509_INFO) *ret=NULL;
  97         unsigned int i,raw;
  98         d2i_of_void *d2i;
  99
 100         if (sk == NULL)
 101                 {
 102                 if ((ret=sk_X509_INFO_new_null()) == NULL)
 103                         {
 104                         PEMerr(PEM_F_PEM_X509_INFO_READ_BIO,ERR_R_MALLOC_FAILURE);
 105                         goto err;
 106                         }
 107                 }
 108         else
 109                 ret=sk;
 110
 111         if ((xi=X509_INFO_new()) == NULL) goto err;
 112         for (;;)
 113                 {
 114                 raw=0;
 115                 i=PEM_read_bio(bp,&name,&header,&data,&len);
 116                 if (i == 0)
 117                         {
 118                         error=ERR_GET_REASON(ERR_peek_last_error());
 119                         if (error == PEM_R_NO_START_LINE)
 120                                 {
 121                                 ERR_clear_error();
 122                                 break;
 123                                 }
 124                         goto err;
 125                         }
 126 start:
 127                 if (    (strcmp(name,PEM_STRING_X509) == 0) ||
 128                         (strcmp(name,PEM_STRING_X509_OLD) == 0))
 129                         {
 130                         d2i=(D2I_OF(void))d2i_X509;
 131                         if (xi->x509 != NULL)
 132                                 {
 133                                 if (!sk_X509_INFO_push(ret,xi)) goto err;
 134                                 if ((xi=X509_INFO_new()) == NULL) goto err;
 135                                 goto start;
 136                                 }
 137                         pp=&(xi->x509);
 138                         }
 139                 else if ((strcmp(name,PEM_STRING_X509_TRUSTED) == 0))
 140                         {
 141                         d2i=(D2I_OF(void))d2i_X509_AUX;
 142                         if (xi->x509 != NULL)
 143                                 {
 144                                 if (!sk_X509_INFO_push(ret,xi)) goto err;
 145                                 if ((xi=X509_INFO_new()) == NULL) goto err;
 146                                 goto start;
 147                                 }
 148                         pp=&(xi->x509);
 149                         }
 150                 else if (strcmp(name,PEM_STRING_X509_CRL) == 0)
 151                         {
 152                         d2i=(D2I_OF(void))d2i_X509_CRL;
 153                         if (xi->crl != NULL)
 154                                 {
 155                                 if (!sk_X509_INFO_push(ret,xi)) goto err;
 156                                 if ((xi=X509_INFO_new()) == NULL) goto err;
 157                                 goto start;
 158                                 }
 159                         pp=&(xi->crl);
 160                         }
 161                 else
 162 #ifndef OPENSSL_NO_RSA
 163                         if (strcmp(name,PEM_STRING_RSA) == 0)
 164                         {
 165                         d2i=(D2I_OF(void))d2i_RSAPrivateKey;
 166                         if (xi->x_pkey != NULL)
 167                                 {
 168                                 if (!sk_X509_INFO_push(ret,xi)) goto err;
 169                                 if ((xi=X509_INFO_new()) == NULL) goto err;
 170                                 goto start;
 171                                 }
 172
 173                         xi->enc_data=NULL;
 174                         xi->enc_len=0;
 175
 176                         xi->x_pkey=X509_PKEY_new();
 177                         if ((xi->x_pkey->dec_pkey=EVP_PKEY_new()) == NULL)
 178                                 goto err;
 179                         xi->x_pkey->dec_pkey->type=EVP_PKEY_RSA;
 180                         pp=&(xi->x_pkey->dec_pkey->pkey.rsa);
 181                         if ((int)strlen(header) > 10) /* assume encrypted */
 182                                 raw=1;
 183                         }
 184                 else
 185 #endif
 186 #ifndef OPENSSL_NO_DSA
 187                         if (strcmp(name,PEM_STRING_DSA) == 0)
 188                         {
 189                         d2i=(D2I_OF(void))d2i_DSAPrivateKey;
 190                         if (xi->x_pkey != NULL)
 191                                 {
 192                                 if (!sk_X509_INFO_push(ret,xi)) goto err;
 193                                 if ((xi=X509_INFO_new()) == NULL) goto err;
 194                                 goto start;
 195                                 }
 196
 197                         xi->enc_data=NULL;
 198                         xi->enc_len=0;
 199
 200                         xi->x_pkey=X509_PKEY_new();
 201                         if ((xi->x_pkey->dec_pkey=EVP_PKEY_new()) == NULL)
 202                                 goto err;
 203                         xi->x_pkey->dec_pkey->type=EVP_PKEY_DSA;
 204                         pp=(char **)&(xi->x_pkey->dec_pkey->pkey.dsa);
 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                         if ((xi->x_pkey->dec_pkey=EVP_PKEY_new()) == NULL)
 226                                 goto err;
 227                         xi->x_pkey->dec_pkey->type=EVP_PKEY_EC;
 228                         pp=&(xi->x_pkey->dec_pkey->pkey.ec);
 229                         if ((int)strlen(header) > 10) /* assume encrypted */
 230                                 raw=1;
 231                         }
 232                 else
 233 #endif
 234                         {
 235                         d2i=NULL;
 236                         pp=NULL;
 237                         }
 238
 239                 if (d2i != NULL)
 240                         {
 241                         if (!raw)
 242                                 {
 243                                 EVP_CIPHER_INFO cipher;
 244
 245                                 if (!PEM_get_EVP_CIPHER_INFO(header,&cipher))
 246                                         goto err;
 247                                 if (!PEM_do_header(&cipher,data,&len,cb,u))
 248                                         goto err;
 249                                 p=data;
 250                                 if (d2i(pp,&p,len) == NULL)
 251                                         {
 252                                         PEMerr(PEM_F_PEM_X509_INFO_READ_BIO,ERR_R_ASN1_LIB);
 253                                         goto err;
 254                                         }
 255                                 }
 256                         else
 257                                 { /* encrypted RSA data */
 258                                 if (!PEM_get_EVP_CIPHER_INFO(header,
 259                                         &xi->enc_cipher)) goto err;
 260                                 xi->enc_data=(char *)data;
 261                                 xi->enc_len=(int)len;
 262                                 data=NULL;
 263                                 }
 264                         }
 265                 else    {
 266                         /* unknown */
 267                         }
 268                 if (name != NULL) OPENSSL_free(name);
 269                 if (header != NULL) OPENSSL_free(header);
 270                 if (data != NULL) OPENSSL_free(data);
 271                 name=NULL;
 272                 header=NULL;
 273                 data=NULL;
 274                 }
 275
 276         /* if the last one hasn't been pushed yet and there is anything
 277          * in it then add it to the stack ...
 278          */
 279         if ((xi->x509 != NULL) || (xi->crl != NULL) ||
 280                 (xi->x_pkey != NULL) || (xi->enc_data != NULL))
 281                 {
 282                 if (!sk_X509_INFO_push(ret,xi)) goto err;
 283                 xi=NULL;
 284                 }
 285         ok=1;
 286 err:
 287         if (xi != NULL) X509_INFO_free(xi);
 288         if (!ok)
 289                 {
 290                 for (i=0; ((int)i)<sk_X509_INFO_num(ret); i++)
 291                         {
 292                         xi=sk_X509_INFO_value(ret,i);
 293                         X509_INFO_free(xi);
 294                         }
 295                 if (ret != sk) sk_X509_INFO_free(ret);
 296                 ret=NULL;
 297                 }
 298
 299         if (name != NULL) OPENSSL_free(name);
 300         if (header != NULL) OPENSSL_free(header);
 301         if (data != NULL) OPENSSL_free(data);
 302         return(ret);
 303         }
 304
 305
 306 /* A TJH addition */
 307 int PEM_X509_INFO_write_bio(BIO *bp, X509_INFO *xi, EVP_CIPHER *enc,
 308              unsigned char *kstr, int klen, pem_password_cb *cb, void *u)
 309         {
 310         EVP_CIPHER_CTX ctx;
 311         int i,ret=0;
 312         unsigned char *data=NULL;
 313         const char *objstr=NULL;
 314         char buf[PEM_BUFSIZE];
 315         unsigned char *iv=NULL;
 316
 317         if (enc != NULL)
 318                 {
 319                 objstr=OBJ_nid2sn(EVP_CIPHER_nid(enc));
 320                 if (objstr == NULL)
 321                         {
 322                         PEMerr(PEM_F_PEM_X509_INFO_WRITE_BIO,PEM_R_UNSUPPORTED_CIPHER);
 323                         goto err;
 324                         }
 325                 }
 326
 327         /* now for the fun part ... if we have a private key then
 328          * we have to be able to handle a not-yet-decrypted key
 329          * being written out correctly ... if it is decrypted or
 330          * it is non-encrypted then we use the base code
 331          */
 332         if (xi->x_pkey!=NULL)
 333                 {
 334                 if ( (xi->enc_data!=NULL) && (xi->enc_len>0) )
 335                         {
 336                         /* copy from weirdo names into more normal things */
 337                         iv=xi->enc_cipher.iv;
 338                         data=(unsigned char *)xi->enc_data;
 339                         i=xi->enc_len;
 340
 341                         /* we take the encryption data from the
 342                          * internal stuff rather than what the
 343                          * user has passed us ... as we have to
 344                          * match exactly for some strange reason
 345                          */
 346                         objstr=OBJ_nid2sn(
 347                                 EVP_CIPHER_nid(xi->enc_cipher.cipher));
 348                         if (objstr == NULL)
 349                                 {
 350                                 PEMerr(PEM_F_PEM_X509_INFO_WRITE_BIO,PEM_R_UNSUPPORTED_CIPHER);
 351                                 goto err;
 352                                 }
 353
 354                         /* create the right magic header stuff */
 355                         OPENSSL_assert(strlen(objstr)+23+2*enc->iv_len+13 <= sizeof buf);
 356                         buf[0]='\0';
 357                         PEM_proc_type(buf,PEM_TYPE_ENCRYPTED);
 358                         PEM_dek_info(buf,objstr,enc->iv_len,(char *)iv);
 359
 360                         /* use the normal code to write things out */
 361                         i=PEM_write_bio(bp,PEM_STRING_RSA,buf,data,i);
 362                         if (i <= 0) goto err;
 363                         }
 364                 else
 365                         {
 366                         /* Add DSA/DH */
 367 #ifndef OPENSSL_NO_RSA
 368                         /* normal optionally encrypted stuff */
 369                         if (PEM_write_bio_RSAPrivateKey(bp,
 370                                 xi->x_pkey->dec_pkey->pkey.rsa,
 371                                 enc,kstr,klen,cb,u)<=0)
 372                                 goto err;
 373 #endif
 374                         }
 375                 }
 376
 377         /* if we have a certificate then write it out now */
 378         if ((xi->x509 != NULL) && (PEM_write_bio_X509(bp,xi->x509) <= 0))
 379                 goto err;
 380
 381         /* we are ignoring anything else that is loaded into the X509_INFO
 382          * structure for the moment ... as I don't need it so I'm not
 383          * coding it here and Eric can do it when this makes it into the
 384          * base library --tjh
 385          */
 386
 387         ret=1;
 388
 389 err:
 390         OPENSSL_cleanse((char *)&ctx,sizeof(ctx));
 391         OPENSSL_cleanse(buf,PEM_BUFSIZE);
 392         return(ret);
 393         }