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,
  75                                         pem_password_cb *cb, void *u)
  76         {
  77         BIO *b;
  78         STACK_OF(X509_INFO) *ret;
  79
  80         if ((b=BIO_new(BIO_s_file())) == NULL)
  81                 {
  82                 PEMerr(PEM_F_PEM_X509_INFO_READ,ERR_R_BUF_LIB);
  83                 return(0);
  84                 }
  85         BIO_set_fp(b,fp,BIO_NOCLOSE);
  86         ret=PEM_X509_INFO_read_bio(b,sk,cb,u);
  87         BIO_free(b);
  88         return(ret);
  89         }
  90 #endif
  91
  92 STACK_OF(X509_INFO) *PEM_X509_INFO_read_bio(BIO *bp, STACK_OF(X509_INFO) *sk,
  93                                             pem_password_cb *cb, void *u)
  94         {
  95         X509_INFO *xi=NULL;
  96         char *name=NULL,*header=NULL;
  97         void *pp;
  98         unsigned char *data=NULL;
  99         const unsigned char *p;
 100         long len,error=0;
 101         int ok=0;
 102         STACK_OF(X509_INFO) *ret=NULL;
 103         unsigned int i,raw,ptype;
 104         d2i_of_void *d2i = 0;
 105
 106         if (sk == NULL)
 107                 {
 108                 if ((ret=sk_X509_INFO_new_null()) == NULL)
 109                         {
 110                         PEMerr(PEM_F_PEM_X509_INFO_READ_BIO,ERR_R_MALLOC_FAILURE);
 111                         goto err;
 112                         }
 113                 }
 114         else
 115                 ret=sk;
 116
 117         if ((xi=X509_INFO_new()) == NULL) goto err;
 118         for (;;)
 119                 {
 120                 raw=0;
 121                 ptype = 0;
 122                 i=PEM_read_bio(bp,&name,&header,&data,&len);
 123                 if (i == 0)
 124                         {
 125                         error=ERR_GET_REASON(ERR_peek_last_error());
 126                         if (error == PEM_R_NO_START_LINE)
 127                                 {
 128                                 ERR_clear_error();
 129                                 break;
 130                                 }
 131                         goto err;
 132                         }
 133 start:
 134                 if (    (strcmp(name,PEM_STRING_X509) == 0) ||
 135                         (strcmp(name,PEM_STRING_X509_OLD) == 0))
 136                         {
 137                         d2i=(D2I_OF(void))d2i_X509;
 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=&(xi->x509);
 145                         }
 146                 else if ((strcmp(name,PEM_STRING_X509_TRUSTED) == 0))
 147                         {
 148                         d2i=(D2I_OF(void))d2i_X509_AUX;
 149                         if (xi->x509 != 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=&(xi->x509);
 156                         }
 157                 else if (strcmp(name,PEM_STRING_X509_CRL) == 0)
 158                         {
 159                         d2i=(D2I_OF(void))d2i_X509_CRL;
 160                         if (xi->crl != NULL)
 161                                 {
 162                                 if (!sk_X509_INFO_push(ret,xi)) goto err;
 163                                 if ((xi=X509_INFO_new()) == NULL) goto err;
 164                                 goto start;
 165                                 }
 166                         pp=&(xi->crl);
 167                         }
 168                 else
 169 #ifndef OPENSSL_NO_RSA
 170                         if (strcmp(name,PEM_STRING_RSA) == 0)
 171                         {
 172                         if (xi->x_pkey != NULL)
 173                                 {
 174                                 if (!sk_X509_INFO_push(ret,xi)) goto err;
 175                                 if ((xi=X509_INFO_new()) == NULL) goto err;
 176                                 goto start;
 177                                 }
 178
 179                         xi->enc_data=NULL;
 180                         xi->enc_len=0;
 181
 182                         xi->x_pkey=X509_PKEY_new();
 183                         ptype=EVP_PKEY_RSA;
 184                         pp=&xi->x_pkey->dec_pkey;
 185                         if ((int)strlen(header) > 10) /* assume encrypted */
 186                                 raw=1;
 187                         }
 188                 else
 189 #endif
 190 #ifndef OPENSSL_NO_DSA
 191                         if (strcmp(name,PEM_STRING_DSA) == 0)
 192                         {
 193                         d2i=(D2I_OF(void))d2i_DSAPrivateKey;
 194                         if (xi->x_pkey != NULL)
 195                                 {
 196                                 if (!sk_X509_INFO_push(ret,xi)) goto err;
 197                                 if ((xi=X509_INFO_new()) == NULL) goto err;
 198                                 goto start;
 199                                 }
 200
 201                         xi->enc_data=NULL;
 202                         xi->enc_len=0;
 203
 204                         xi->x_pkey=X509_PKEY_new();
 205                         ptype = EVP_PKEY_DSA;
 206                         pp=&xi->x_pkey->dec_pkey;
 207                         if ((int)strlen(header) > 10) /* assume encrypted */
 208                                 raw=1;
 209                         }
 210                 else
 211 #endif
 212 #ifndef OPENSSL_NO_EC
 213                         if (strcmp(name,PEM_STRING_ECPRIVATEKEY) == 0)
 214                         {
 215                                 d2i=(D2I_OF(void))d2i_ECPrivateKey;
 216                                 if (xi->x_pkey != NULL)
 217                                 {
 218                                         if (!sk_X509_INFO_push(ret,xi)) goto err;
 219                                         if ((xi=X509_INFO_new()) == NULL) goto err;
 220                                                 goto start;
 221                                 }
 222
 223                         xi->enc_data=NULL;
 224                         xi->enc_len=0;
 225
 226                         xi->x_pkey=X509_PKEY_new();
 227                         ptype = EVP_PKEY_EC;
 228                         pp=&xi->x_pkey->dec_pkey;
 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 (ptype)
 251                                         {
 252                                         if (!d2i_PrivateKey(ptype, pp, &p, len))
 253                                                 {
 254                                                 PEMerr(PEM_F_PEM_X509_INFO_READ_BIO,ERR_R_ASN1_LIB);
 255                                                 goto err;
 256                                                 }
 257                                         }
 258                                 else if (d2i(pp,&p,len) == NULL)
 259                                         {
 260                                         PEMerr(PEM_F_PEM_X509_INFO_READ_BIO,ERR_R_ASN1_LIB);
 261                                         goto err;
 262                                         }
 263                                 }
 264                         else
 265                                 { /* encrypted RSA data */
 266                                 if (!PEM_get_EVP_CIPHER_INFO(header,
 267                                         &xi->enc_cipher)) goto err;
 268                                 xi->enc_data=(char *)data;
 269                                 xi->enc_len=(int)len;
 270                                 data=NULL;
 271                                 }
 272                         }
 273                 else    {
 274                         /* unknown */
 275                         }
 276                 if (name != NULL) OPENSSL_free(name);
 277                 if (header != NULL) OPENSSL_free(header);
 278                 if (data != NULL) OPENSSL_free(data);
 279                 name=NULL;
 280                 header=NULL;
 281                 data=NULL;
 282                 }
 283
 284         /* if the last one hasn't been pushed yet and there is anything
 285          * in it then add it to the stack ...
 286          */
 287         if ((xi->x509 != NULL) || (xi->crl != NULL) ||
 288                 (xi->x_pkey != NULL) || (xi->enc_data != NULL))
 289                 {
 290                 if (!sk_X509_INFO_push(ret,xi)) goto err;
 291                 xi=NULL;
 292                 }
 293         ok=1;
 294 err:
 295         if (xi != NULL) X509_INFO_free(xi);
 296         if (!ok)
 297                 {
 298                 for (i=0; ((int)i)<sk_X509_INFO_num(ret); i++)
 299                         {
 300                         xi=sk_X509_INFO_value(ret,i);
 301                         X509_INFO_free(xi);
 302                         }
 303                 if (ret != sk) sk_X509_INFO_free(ret);
 304                 ret=NULL;
 305                 }
 306
 307         if (name != NULL) OPENSSL_free(name);
 308         if (header != NULL) OPENSSL_free(header);
 309         if (data != NULL) OPENSSL_free(data);
 310         return(ret);
 311         }
 312
 313
 314 /* A TJH addition */
 315 int PEM_X509_INFO_write_bio(BIO *bp, X509_INFO *xi, EVP_CIPHER *enc,
 316              unsigned char *kstr, int klen, pem_password_cb *cb, void *u)
 317         {
 318         EVP_CIPHER_CTX ctx;
 319         int i,ret=0;
 320         unsigned char *data=NULL;
 321         const char *objstr=NULL;
 322         char buf[PEM_BUFSIZE];
 323         unsigned char *iv=NULL;
 324
 325         if (enc != NULL)
 326                 {
 327                 objstr=OBJ_nid2sn(EVP_CIPHER_nid(enc));
 328                 if (objstr == NULL)
 329                         {
 330                         PEMerr(PEM_F_PEM_X509_INFO_WRITE_BIO,PEM_R_UNSUPPORTED_CIPHER);
 331                         goto err;
 332                         }
 333                 }
 334
 335         /* now for the fun part ... if we have a private key then
 336          * we have to be able to handle a not-yet-decrypted key
 337          * being written out correctly ... if it is decrypted or
 338          * it is non-encrypted then we use the base code
 339          */
 340         if (xi->x_pkey!=NULL)
 341                 {
 342                 if ( (xi->enc_data!=NULL) && (xi->enc_len>0) )
 343                         {
 344                         if (enc == NULL)
 345                                 {
 346                                 PEMerr(PEM_F_PEM_X509_INFO_WRITE_BIO,PEM_R_CIPHER_IS_NULL);
 347                                 goto err;
 348                                 }
 349
 350                         /* copy from weirdo names into more normal things */
 351                         iv=xi->enc_cipher.iv;
 352                         data=(unsigned char *)xi->enc_data;
 353                         i=xi->enc_len;
 354
 355                         /* we take the encryption data from the
 356                          * internal stuff rather than what the
 357                          * user has passed us ... as we have to
 358                          * match exactly for some strange reason
 359                          */
 360                         objstr=OBJ_nid2sn(
 361                                 EVP_CIPHER_nid(xi->enc_cipher.cipher));
 362                         if (objstr == NULL)
 363                                 {
 364                                 PEMerr(PEM_F_PEM_X509_INFO_WRITE_BIO,PEM_R_UNSUPPORTED_CIPHER);
 365                                 goto err;
 366                                 }
 367
 368                         /* create the right magic header stuff */
 369                         OPENSSL_assert(strlen(objstr)+23+2*enc->iv_len+13 <= sizeof buf);
 370                         buf[0]='\0';
 371                         PEM_proc_type(buf,PEM_TYPE_ENCRYPTED);
 372                         PEM_dek_info(buf,objstr,enc->iv_len,(char *)iv);
 373
 374                         /* use the normal code to write things out */
 375                         i=PEM_write_bio(bp,PEM_STRING_RSA,buf,data,i);
 376                         if (i <= 0) goto err;
 377                         }
 378                 else
 379                         {
 380                         /* Add DSA/DH */
 381 #ifndef OPENSSL_NO_RSA
 382                         /* normal optionally encrypted stuff */
 383                         if (PEM_write_bio_RSAPrivateKey(bp,
 384                                 xi->x_pkey->dec_pkey->pkey.rsa,
 385                                 enc,kstr,klen,cb,u)<=0)
 386                                 goto err;
 387 #endif
 388                         }
 389                 }
 390
 391         /* if we have a certificate then write it out now */
 392         if ((xi->x509 != NULL) && (PEM_write_bio_X509(bp,xi->x509) <= 0))
 393                 goto err;
 394
 395         /* we are ignoring anything else that is loaded into the X509_INFO
 396          * structure for the moment ... as I don't need it so I'm not
 397          * coding it here and Eric can do it when this makes it into the
 398          * base library --tjh
 399          */
 400
 401         ret=1;
 402
 403 err:
 404         OPENSSL_cleanse((char *)&ctx,sizeof(ctx));
 405         OPENSSL_cleanse(buf,PEM_BUFSIZE);
 406         return(ret);
 407         }