mem.c

   1 /* originally from crypto/x509/by_file.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 /* Added code to use a memory object as opposed to a file for lookup purposes. */
  60
  61 #include <string.h>
  62
  63 #include <openssl/bio.h>
  64 #include <openssl/err.h>
  65 #include <openssl/pem.h>
  66 #include <openssl/ssl.h>
  67 #include <openssl/x509_vfy.h>
  68
  69 static int by_mem_ctrl(X509_LOOKUP *, int, const char *, long, char **);
  70 static int X509_load_cert_crl_mem(X509_LOOKUP *ctx, const char *str, int type);
  71
  72 X509_LOOKUP_METHOD x509_mem_lookup =
  73 {
  74         "Memory from user provided string",
  75         NULL,
  76         NULL,
  77         NULL,
  78         NULL,
  79         by_mem_ctrl,
  80         NULL,
  81         NULL,
  82         NULL,
  83         NULL
  84 };
  85
  86 static X509_LOOKUP_METHOD * X509_LOOKUP_mem()
  87 {
  88         return (&x509_mem_lookup);
  89 }
  90
  91 static int by_mem_ctrl(X509_LOOKUP *ctx, int cmd, const char * str, long argl, char ** ret)
  92 {
  93         int status = 0;
  94         if (cmd == X509_L_FILE_LOAD)
  95         {
  96                 if (argl == X509_FILETYPE_PEM)
  97                         return X509_load_cert_crl_mem(ctx, str, X509_FILETYPE_PEM) != 0;
  98         }
  99         return status;
 100 }
 101
 102 static int X509_load_cert_crl_mem(X509_LOOKUP *ctx, const char *str, int type)
 103 {
 104         BIO *in = NULL;
 105         int status = 0;
 106         int count = 0;
 107         int i;
 108         X509 *x = NULL;
 109
 110         if (str == NULL) return 1;
 111         in = BIO_new(BIO_s_mem());
 112         if ((in == NULL) || (BIO_write(in, str, strlen(str)) != strlen(str)) || type != X509_FILETYPE_PEM)
 113         {
 114                 /* this error isn't the same as the real file one, but it'll serve the same purpose */
 115                 X509err(X509_F_X509_LOAD_CERT_FILE,ERR_R_SYS_LIB);
 116                 goto err;
 117         }
 118
 119         for (;;)
 120         {
 121                 x=PEM_read_bio_X509_AUX(in,NULL,NULL,NULL);
 122                 if (x == NULL)
 123                 {
 124                         if ((ERR_GET_REASON(ERR_peek_last_error()) ==
 125                                 PEM_R_NO_START_LINE) && (count > 0))
 126                         {
 127                                 ERR_clear_error();
 128                                 break;
 129                         }
 130                         else
 131                         {
 132                                 X509err(X509_F_X509_LOAD_CERT_FILE,
 133                                 ERR_R_PEM_LIB);
 134                                 goto err;
 135                         }
 136                 }
 137                 i=X509_STORE_add_cert(ctx->store_ctx,x);
 138                 if (!i) goto err;
 139                 count++;
 140                 X509_free(x);
 141                 x=NULL;
 142         }
 143         status=count;
 144
 145 err:
 146         if (x != NULL) X509_free(x);
 147         if (in != NULL) BIO_free(in);
 148         return status;
 149
 150 }
 151
 152 static int X509_STORE_load_mem(X509_STORE *ctx, const char *str)
 153 {
 154         X509_LOOKUP *lookup;
 155         if (!str) return 1;
 156
 157         lookup = X509_STORE_add_lookup(ctx, X509_LOOKUP_mem());
 158         if (lookup == NULL) return 0;
 159         if (X509_LOOKUP_ctrl(lookup,X509_L_FILE_LOAD,str,X509_FILETYPE_PEM, NULL) != 1)
 160                 return 0;
 161         return 1;
 162 }
 163 int SSL_CTX_load_verify_locations_mem(SSL_CTX * ctx, const char *str)
 164 {
 165         return X509_STORE_load_mem(ctx->cert_store, str);
 166 }