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         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;
 103     d2i_of_void *d2i;
 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         i = PEM_read_bio(bp, &name, &header, &data, &len);
 118         if (i == 0) {
 119             error = ERR_GET_REASON(ERR_peek_last_error());
 120             if (error == PEM_R_NO_START_LINE) {
 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             d2i = (D2I_OF(void)) d2i_X509;
 130             if (xi->x509 != NULL) {
 131                 if (!sk_X509_INFO_push(ret, xi))
 132                     goto err;
 133                 if ((xi = X509_INFO_new()) == NULL)
 134                     goto err;
 135                 goto start;
 136             }
 137             pp = &(xi->x509);
 138         } else if ((strcmp(name, PEM_STRING_X509_TRUSTED) == 0)) {
 139             d2i = (D2I_OF(void)) d2i_X509_AUX;
 140             if (xi->x509 != NULL) {
 141                 if (!sk_X509_INFO_push(ret, xi))
 142                     goto err;
 143                 if ((xi = X509_INFO_new()) == NULL)
 144                     goto err;
 145                 goto start;
 146             }
 147             pp = &(xi->x509);
 148         } else if (strcmp(name, PEM_STRING_X509_CRL) == 0) {
 149             d2i = (D2I_OF(void)) d2i_X509_CRL;
 150             if (xi->crl != NULL) {
 151                 if (!sk_X509_INFO_push(ret, xi))
 152                     goto err;
 153                 if ((xi = X509_INFO_new()) == NULL)
 154                     goto err;
 155                 goto start;
 156             }
 157             pp = &(xi->crl);
 158         } else
 159 #ifndef OPENSSL_NO_RSA
 160         if (strcmp(name, PEM_STRING_RSA) == 0) {
 161             d2i = (D2I_OF(void)) d2i_RSAPrivateKey;
 162             if (xi->x_pkey != NULL) {
 163                 if (!sk_X509_INFO_push(ret, xi))
 164                     goto err;
 165                 if ((xi = X509_INFO_new()) == NULL)
 166                     goto err;
 167                 goto start;
 168             }
 169
 170             xi->enc_data = NULL;
 171             xi->enc_len = 0;
 172
 173             xi->x_pkey = X509_PKEY_new();
 174             if ((xi->x_pkey->dec_pkey = EVP_PKEY_new()) == NULL)
 175                 goto err;
 176             xi->x_pkey->dec_pkey->type = EVP_PKEY_RSA;
 177             pp = &(xi->x_pkey->dec_pkey->pkey.rsa);
 178             if ((int)strlen(header) > 10) /* assume encrypted */
 179                 raw = 1;
 180         } else
 181 #endif
 182 #ifndef OPENSSL_NO_DSA
 183         if (strcmp(name, PEM_STRING_DSA) == 0) {
 184             d2i = (D2I_OF(void)) d2i_DSAPrivateKey;
 185             if (xi->x_pkey != NULL) {
 186                 if (!sk_X509_INFO_push(ret, xi))
 187                     goto err;
 188                 if ((xi = X509_INFO_new()) == NULL)
 189                     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 = &xi->x_pkey->dec_pkey->pkey.dsa;
 201             if ((int)strlen(header) > 10) /* assume encrypted */
 202                 raw = 1;
 203         } else
 204 #endif
 205 #ifndef OPENSSL_NO_EC
 206         if (strcmp(name, PEM_STRING_ECPRIVATEKEY) == 0) {
 207             d2i = (D2I_OF(void)) d2i_ECPrivateKey;
 208             if (xi->x_pkey != NULL) {
 209                 if (!sk_X509_INFO_push(ret, xi))
 210                     goto err;
 211                 if ((xi = X509_INFO_new()) == NULL)
 212                     goto err;
 213                 goto start;
 214             }
 215
 216             xi->enc_data = NULL;
 217             xi->enc_len = 0;
 218
 219             xi->x_pkey = X509_PKEY_new();
 220             if ((xi->x_pkey->dec_pkey = EVP_PKEY_new()) == NULL)
 221                 goto err;
 222             xi->x_pkey->dec_pkey->type = EVP_PKEY_EC;
 223             pp = &(xi->x_pkey->dec_pkey->pkey.ec);
 224             if ((int)strlen(header) > 10) /* assume encrypted */
 225                 raw = 1;
 226         } else
 227 #endif
 228         {
 229             d2i = NULL;
 230             pp = NULL;
 231         }
 232
 233         if (d2i != NULL) {
 234             if (!raw) {
 235                 EVP_CIPHER_INFO cipher;
 236
 237                 if (!PEM_get_EVP_CIPHER_INFO(header, &cipher))
 238                     goto err;
 239                 if (!PEM_do_header(&cipher, data, &len, cb, u))
 240                     goto err;
 241                 p = data;
 242                 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     if (xi != NULL)
 280         X509_INFO_free(xi);
 281     if (!ok) {
 282         for (i = 0; ((int)i) < sk_X509_INFO_num(ret); i++) {
 283             xi = sk_X509_INFO_value(ret, i);
 284             X509_INFO_free(xi);
 285         }
 286         if (ret != sk)
 287             sk_X509_INFO_free(ret);
 288         ret = NULL;
 289     }
 290
 291     if (name != NULL)
 292         OPENSSL_free(name);
 293     if (header != NULL)
 294         OPENSSL_free(header);
 295     if (data != NULL)
 296         OPENSSL_free(data);
 297     return (ret);
 298 }
 299
 300 /* A TJH addition */
 301 int PEM_X509_INFO_write_bio(BIO *bp, X509_INFO *xi, EVP_CIPHER *enc,
 302                             unsigned char *kstr, int klen,
 303                             pem_password_cb *cb, void *u)
 304 {
 305     EVP_CIPHER_CTX ctx;
 306     int i, ret = 0;
 307     unsigned char *data = NULL;
 308     const char *objstr = NULL;
 309     char buf[PEM_BUFSIZE];
 310     unsigned char *iv = NULL;
 311
 312     if (enc != NULL) {
 313         objstr = OBJ_nid2sn(EVP_CIPHER_nid(enc));
 314         if (objstr == NULL) {
 315             PEMerr(PEM_F_PEM_X509_INFO_WRITE_BIO, PEM_R_UNSUPPORTED_CIPHER);
 316             goto err;
 317         }
 318     }
 319
 320     /*
 321      * now for the fun part ... if we have a private key then we have to be
 322      * able to handle a not-yet-decrypted key being written out correctly ...
 323      * if it is decrypted or it is non-encrypted then we use the base code
 324      */
 325     if (xi->x_pkey != NULL) {
 326         if ((xi->enc_data != NULL) && (xi->enc_len > 0)) {
 327             /* copy from weirdo names into more normal things */
 328             iv = xi->enc_cipher.iv;
 329             data = (unsigned char *)xi->enc_data;
 330             i = xi->enc_len;
 331
 332             /*
 333              * we take the encryption data from the internal stuff rather
 334              * than what the user has passed us ... as we have to match
 335              * exactly for some strange reason
 336              */
 337             objstr = OBJ_nid2sn(EVP_CIPHER_nid(xi->enc_cipher.cipher));
 338             if (objstr == NULL) {
 339                 PEMerr(PEM_F_PEM_X509_INFO_WRITE_BIO,
 340                        PEM_R_UNSUPPORTED_CIPHER);
 341                 goto err;
 342             }
 343
 344             /* create the right magic header stuff */
 345             OPENSSL_assert(strlen(objstr) + 23 + 2 * enc->iv_len + 13 <=
 346                            sizeof buf);
 347             buf[0] = '\0';
 348             PEM_proc_type(buf, PEM_TYPE_ENCRYPTED);
 349             PEM_dek_info(buf, objstr, enc->iv_len, (char *)iv);
 350
 351             /* use the normal code to write things out */
 352             i = PEM_write_bio(bp, PEM_STRING_RSA, buf, data, i);
 353             if (i <= 0)
 354                 goto err;
 355         } else {
 356             /* Add DSA/DH */
 357 #ifndef OPENSSL_NO_RSA
 358             /* normal optionally encrypted stuff */
 359             if (PEM_write_bio_RSAPrivateKey(bp,
 360                                             xi->x_pkey->dec_pkey->pkey.rsa,
 361                                             enc, kstr, klen, cb, u) <= 0)
 362                 goto err;
 363 #endif
 364         }
 365     }
 366
 367     /* if we have a certificate then write it out now */
 368     if ((xi->x509 != NULL) && (PEM_write_bio_X509(bp, xi->x509) <= 0))
 369         goto err;
 370
 371     /*
 372      * we are ignoring anything else that is loaded into the X509_INFO
 373      * structure for the moment ... as I don't need it so I'm not coding it
 374      * here and Eric can do it when this makes it into the base library --tjh
 375      */
 376
 377     ret = 1;
 378
 379  err:
 380     OPENSSL_cleanse((char *)&ctx, sizeof(ctx));
 381     OPENSSL_cleanse(buf, PEM_BUFSIZE);
 382     return (ret);
 383 }