lib/gssapi/krb5/compat.c

   1 /*
   2  * Copyright (c) 2003 - 2005 Kungliga Tekniska Högskolan
   3  * (Royal Institute of Technology, Stockholm, Sweden).
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  *
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  *
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  *
  17  * 3. Neither the name of the Institute nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  */
  33
  34 #include "gsskrb5_locl.h"
  35
  36 static krb5_error_code
  37 check_compat(OM_uint32 *minor_status,
  38              krb5_context context, krb5_const_principal name,
  39              const char *option, krb5_boolean *compat,
  40              krb5_boolean match_val)
  41 {
  42     krb5_error_code ret = 0;
  43     char **p, **q;
  44     krb5_principal match;
  45
  46
  47     p = krb5_config_get_strings(context, NULL, "gssapi",
  48                                 option, NULL);
  49     if(p == NULL)
  50         return 0;
  51
  52     match = NULL;
  53     for(q = p; *q; q++) {
  54         ret = krb5_parse_name(context, *q, &match);
  55         if (ret)
  56             break;
  57
  58         if (krb5_principal_match(context, name, match)) {
  59             *compat = match_val;
  60             break;
  61         }
  62
  63         krb5_free_principal(context, match);
  64         match = NULL;
  65     }
  66     if (match)
  67         krb5_free_principal(context, match);
  68     krb5_config_free_strings(p);
  69
  70     if (ret) {
  71         if (minor_status)
  72             *minor_status = ret;
  73         return GSS_S_FAILURE;
  74     }
  75
  76     return 0;
  77 }
  78
  79 /*
  80  * ctx->ctx_id_mutex is assumed to be locked
  81  */
  82
  83 OM_uint32
  84 _gss_DES3_get_mic_compat(OM_uint32 *minor_status,
  85                          gsskrb5_ctx ctx,
  86                          krb5_context context)
  87 {
  88     krb5_boolean use_compat = FALSE;
  89     OM_uint32 ret;
  90
  91     if ((ctx->more_flags & COMPAT_OLD_DES3_SELECTED) == 0) {
  92         ret = check_compat(minor_status, context, ctx->target,
  93                            "broken_des3_mic", &use_compat, TRUE);
  94         if (ret)
  95             return ret;
  96         ret = check_compat(minor_status, context, ctx->target,
  97                            "correct_des3_mic", &use_compat, FALSE);
  98         if (ret)
  99             return ret;
 100
 101         if (use_compat)
 102             ctx->more_flags |= COMPAT_OLD_DES3;
 103         ctx->more_flags |= COMPAT_OLD_DES3_SELECTED;
 104     }
 105     return 0;
 106 }
 107
 108 #if 0
 109 OM_uint32
 110 gss_krb5_compat_des3_mic(OM_uint32 *minor_status, gss_ctx_id_t ctx, int on)
 111 {
 112     *minor_status = 0;
 113
 114     HEIMDAL_MUTEX_lock(&ctx->ctx_id_mutex);
 115     if (on) {
 116         ctx->more_flags |= COMPAT_OLD_DES3;
 117     } else {
 118         ctx->more_flags &= ~COMPAT_OLD_DES3;
 119     }
 120     ctx->more_flags |= COMPAT_OLD_DES3_SELECTED;
 121     HEIMDAL_MUTEX_unlock(&ctx->ctx_id_mutex);
 122
 123     return 0;
 124 }
 125 #endif