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_STDIO
  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         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,
  92                                             pem_password_cb *cb, void *u)
  93 {
  94     X509_INFO *xi = NULL;
  95     char *name = NULL, *header = NULL;
  96     void *pp;
  97     unsigned char *data = NULL;
  98     const unsigned char *p;
  99     long len, error = 0;
 100     int ok = 0;
 101     STACK_OF(X509_INFO) *ret = NULL;
 102     unsigned int i, raw, ptype;
 103     d2i_of_void *d2i = 0;
 104
 105     if (sk == NULL) {
 106         if ((ret = sk_X509_INFO_new_null()) == NULL) {
 107             PEMerr(PEM_F_PEM_X509_INFO_READ_BIO, ERR_R_MALLOC_FAILURE);
 108             goto err;
 109         }
 110     } else
 111         ret = sk;
 112
 113     if ((xi = X509_INFO_new()) == NULL)
 114         goto err;
 115     for (;;) {
 116         raw = 0;
 117         ptype = 0;
 118         i = PEM_read_bio(bp, &name, &header, &data, &len);
 119         if (i == 0) {
 120             error = ERR_GET_REASON(ERR_peek_last_error());
 121             if (error == PEM_R_NO_START_LINE) {
 122                 ERR_clear_error();
 123                 break;
 124             }
 125             goto err;
 126         }
 127  start:
 128         if ((strcmp(name, PEM_STRING_X509) == 0) ||
 129             (strcmp(name, PEM_STRING_X509_OLD) == 0)) {
 130             d2i = (D2I_OF(void)) d2i_X509;
 131             if (xi->x509 != NULL) {
 132                 if (!sk_X509_INFO_push(ret, xi))
 133                     goto err;
 134                 if ((xi = X509_INFO_new()) == NULL)
 135                     goto err;
 136                 goto start;
 137             }
 138             pp = &(xi->x509);
 139         } else if ((strcmp(name, PEM_STRING_X509_TRUSTED) == 0)) {
 140             d2i = (D2I_OF(void)) d2i_X509_AUX;
 141             if (xi->x509 != NULL) {
 142                 if (!sk_X509_INFO_push(ret, xi))
 143                     goto err;
 144                 if ((xi = X509_INFO_new()) == NULL)
 145                     goto err;
 146                 goto start;
 147             }
 148             pp = &(xi->x509);
 149         } else if (strcmp(name, PEM_STRING_X509_CRL) == 0) {
 150             d2i = (D2I_OF(void)) d2i_X509_CRL;
 151             if (xi->crl != NULL) {
 152                 if (!sk_X509_INFO_push(ret, xi))
 153                     goto err;
 154                 if ((xi = X509_INFO_new()) == NULL)
 155                     goto err;
 156                 goto start;
 157             }
 158             pp = &(xi->crl);
 159         } else
 160 #ifndef OPENSSL_NO_RSA
 161         if (strcmp(name, PEM_STRING_RSA) == 0) {
 162             d2i = (D2I_OF(void)) d2i_RSAPrivateKey;
 163             if (xi->x_pkey != NULL) {
 164                 if (!sk_X509_INFO_push(ret, xi))
 165                     goto err;
 166                 if ((xi = X509_INFO_new()) == NULL)
 167                     goto err;
 168                 goto start;
 169             }
 170
 171             xi->enc_data = NULL;
 172             xi->enc_len = 0;
 173
 174             xi->x_pkey = X509_PKEY_new();
 175             ptype = EVP_PKEY_RSA;
 176             pp = &xi->x_pkey->dec_pkey;
 177             if ((int)strlen(header) > 10) /* assume encrypted */
 178                 raw = 1;
 179         } else
 180 #endif
 181 #ifndef OPENSSL_NO_DSA
 182         if (strcmp(name, PEM_STRING_DSA) == 0) {
 183             d2i = (D2I_OF(void)) d2i_DSAPrivateKey;
 184             if (xi->x_pkey != NULL) {
 185                 if (!sk_X509_INFO_push(ret, xi))
 186                     goto err;
 187                 if ((xi = X509_INFO_new()) == NULL)
 188                     goto err;
 189                 goto start;
 190             }
 191
 192             xi->enc_data = NULL;
 193             xi->enc_len = 0;
 194
 195             xi->x_pkey = X509_PKEY_new();
 196             ptype = EVP_PKEY_DSA;
 197             pp = &xi->x_pkey->dec_pkey;
 198             if ((int)strlen(header) > 10) /* assume encrypted */
 199                 raw = 1;
 200         } else
 201 #endif
 202 #ifndef OPENSSL_NO_EC
 203         if (strcmp(name, PEM_STRING_ECPRIVATEKEY) == 0) {
 204             d2i = (D2I_OF(void)) d2i_ECPrivateKey;
 205             if (xi->x_pkey != NULL) {
 206                 if (!sk_X509_INFO_push(ret, xi))
 207                     goto err;
 208                 if ((xi = X509_INFO_new()) == NULL)
 209                     goto err;
 210                 goto start;
 211             }
 212
 213             xi->enc_data = NULL;
 214             xi->enc_len = 0;
 215
 216             xi->x_pkey = X509_PKEY_new();
 217             ptype = EVP_PKEY_EC;
 218             pp = &xi->x_pkey->dec_pkey;
 219             if ((int)strlen(header) > 10) /* assume encrypted */
 220                 raw = 1;
 221         } else
 222 #endif
 223         {
 224             d2i = NULL;
 225             pp = NULL;
 226         }
 227
 228         if (d2i != NULL) {
 229             if (!raw) {
 230                 EVP_CIPHER_INFO cipher;
 231
 232                 if (!PEM_get_EVP_CIPHER_INFO(header, &cipher))
 233                     goto err;
 234                 if (!PEM_do_header(&cipher, data, &len, cb, u))
 235                     goto err;
 236                 p = data;
 237                 if (ptype) {
 238                     if (!d2i_PrivateKey(ptype, pp, &p, len)) {
 239                         PEMerr(PEM_F_PEM_X509_INFO_READ_BIO, ERR_R_ASN1_LIB);
 240                         goto err;
 241                     }
 242                 } else if (d2i(pp, &p, len) == NULL) {
 243                     PEMerr(PEM_F_PEM_X509_INFO_READ_BIO, ERR_R_ASN1_LIB);
 244                     goto err;
 245                 }
 246             } else {            /* encrypted RSA data */
 247                 if (!PEM_get_EVP_CIPHER_INFO(header, &xi->enc_cipher))
 248                     goto err;
 249                 xi->enc_data = (char *)data;
 250                 xi->enc_len = (int)len;
 251                 data = NULL;
 252             }
 253         } else {
 254             /* unknown */
 255         }
 256         if (name != NULL)
 257             OPENSSL_free(name);
 258         if (header != NULL)
 259             OPENSSL_free(header);
 260         if (data != NULL)
 261             OPENSSL_free(data);
 262         name = NULL;
 263         header = NULL;
 264         data = NULL;
 265     }
 266
 267     /*
 268      * if the last one hasn't been pushed yet and there is anything in it
 269      * then add it to the stack ...
 270      */
 271     if ((xi->x509 != NULL) || (xi->crl != NULL) ||
 272         (xi->x_pkey != NULL) || (xi->enc_data != NULL)) {
 273         if (!sk_X509_INFO_push(ret, xi))
 274             goto err;
 275         xi = NULL;
 276     }
 277     ok = 1;
 278  err:
 279     X509_INFO_free(xi);
 280     if (!ok) {
 281         for (i = 0; ((int)i) < sk_X509_INFO_num(ret); i++) {
 282             xi = sk_X509_INFO_value(ret, i);
 283             X509_INFO_free(xi);
 284         }
 285         if (ret != sk)
 286             sk_X509_INFO_free(ret);
 287         ret = NULL;
 288     }
 289
 290     if (name != NULL)
 291         OPENSSL_free(name);
 292     if (header != NULL)
 293         OPENSSL_free(header);
 294     if (data != NULL)
 295         OPENSSL_free(data);
 296     return (ret);
 297 }
 298
 299 /* A TJH addition */
 300 int PEM_X509_INFO_write_bio(BIO *bp, X509_INFO *xi, EVP_CIPHER *enc,
 301                             unsigned char *kstr, int klen,
 302                             pem_password_cb *cb, void *u)
 303 {
 304     EVP_CIPHER_CTX ctx;
 305     int i, ret = 0;
 306     unsigned char *data = NULL;
 307     const char *objstr = NULL;
 308     char buf[PEM_BUFSIZE];
 309     unsigned char *iv = NULL;
 310
 311     if (enc != NULL) {
 312         objstr = OBJ_nid2sn(EVP_CIPHER_nid(enc));
 313         if (objstr == NULL) {
 314             PEMerr(PEM_F_PEM_X509_INFO_WRITE_BIO, PEM_R_UNSUPPORTED_CIPHER);
 315             goto err;
 316         }
 317     }
 318
 319     /*
 320      * now for the fun part ... if we have a private key then we have to be
 321      * able to handle a not-yet-decrypted key being written out correctly ...
 322      * if it is decrypted or it is non-encrypted then we use the base code
 323      */
 324     if (xi->x_pkey != NULL) {
 325         if ((xi->enc_data != NULL) && (xi->enc_len > 0)) {
 326             if (enc == NULL) {
 327                 PEMerr(PEM_F_PEM_X509_INFO_WRITE_BIO, PEM_R_CIPHER_IS_NULL);
 328                 goto err;
 329             }
 330
 331             /* copy from weirdo names into more normal things */
 332             iv = xi->enc_cipher.iv;
 333             data = (unsigned char *)xi->enc_data;
 334             i = xi->enc_len;
 335
 336             /*
 337              * we take the encryption data from the internal stuff rather
 338              * than what the user has passed us ... as we have to match
 339              * exactly for some strange reason
 340              */
 341             objstr = OBJ_nid2sn(EVP_CIPHER_nid(xi->enc_cipher.cipher));
 342             if (objstr == NULL) {
 343                 PEMerr(PEM_F_PEM_X509_INFO_WRITE_BIO,
 344                        PEM_R_UNSUPPORTED_CIPHER);
 345                 goto err;
 346             }
 347
 348             /* create the right magic header stuff */
 349             OPENSSL_assert(strlen(objstr) + 23 + 2 * enc->iv_len + 13 <=
 350                            sizeof buf);
 351             buf[0] = '\0';
 352             PEM_proc_type(buf, PEM_TYPE_ENCRYPTED);
 353             PEM_dek_info(buf, objstr, enc->iv_len, (char *)iv);
 354
 355             /* use the normal code to write things out */
 356             i = PEM_write_bio(bp, PEM_STRING_RSA, buf, data, i);
 357             if (i <= 0)
 358                 goto err;
 359         } else {
 360             /* Add DSA/DH */
 361 #ifndef OPENSSL_NO_RSA
 362             /* normal optionally encrypted stuff */
 363             if (PEM_write_bio_RSAPrivateKey(bp,
 364                                             xi->x_pkey->dec_pkey->pkey.rsa,
 365                                             enc, kstr, klen, cb, u) <= 0)
 366                 goto err;
 367 #endif
 368         }
 369     }
 370
 371     /* if we have a certificate then write it out now */
 372     if ((xi->x509 != NULL) && (PEM_write_bio_X509(bp, xi->x509) <= 0))
 373         goto err;
 374
 375     /*
 376      * we are ignoring anything else that is loaded into the X509_INFO
 377      * structure for the moment ... as I don't need it so I'm not coding it
 378      * here and Eric can do it when this makes it into the base library --tjh
 379      */
 380
 381     ret = 1;
 382
 383  err:
 384     OPENSSL_cleanse((char *)&ctx, sizeof(ctx));
 385     OPENSSL_cleanse(buf, PEM_BUFSIZE);
 386     return (ret);
 387 }