lib/gssapi/compat.c

   1 /*
   2  * Copyright (c) 2003 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 "gssapi_locl.h"
  35
  36 RCSID("$Id$");
  37
  38
  39 static krb5_error_code
  40 check_compat(OM_uint32 *minor_status, gss_name_t name,
  41              const char *option, krb5_boolean *compat,
  42              krb5_boolean match_val)
  43 {
  44     krb5_error_code ret = 0;
  45     char **p, **q;
  46     krb5_principal match;
  47
  48
  49     p = krb5_config_get_strings(gssapi_krb5_context, NULL, "gssapi",
  50                                 option, NULL);
  51     if(p == NULL)
  52         return 0;
  53
  54     for(q = p; *q; q++) {
  55
  56         ret = krb5_parse_name(gssapi_krb5_context, *q, &match);
  57         if (ret)
  58             break;
  59
  60         if (krb5_principal_match(gssapi_krb5_context, name, match)) {
  61             *compat = match_val;
  62             break;
  63         }
  64
  65         krb5_free_principal(gssapi_krb5_context, match);
  66     }
  67     krb5_config_free_strings(p);
  68
  69     if (ret) {
  70         *minor_status = ret;
  71         return GSS_S_FAILURE;
  72     }
  73
  74     return 0;
  75 }
  76
  77 OM_uint32
  78 _gss_DES3_get_mic_compat(OM_uint32 *minor_status, gss_ctx_id_t ctx)
  79 {
  80     krb5_boolean use_compat = TRUE;
  81     OM_uint32 ret;
  82
  83     if ((ctx->more_flags & COMPAT_OLD_DES3_SELECTED) == 0) {
  84         ret = check_compat(minor_status, ctx->target,
  85                            "broken_des3_mic", &use_compat, TRUE);
  86         if (ret)
  87             return ret;
  88         ret = check_compat(minor_status, ctx->target,
  89                            "correct_des3_mic", &use_compat, FALSE);
  90         if (ret)
  91             return ret;
  92
  93         if (use_compat)
  94             ctx->more_flags |= COMPAT_OLD_DES3;
  95         ctx->more_flags |= COMPAT_OLD_DES3_SELECTED;
  96     }
  97     return 0;
  98 }
  99
 100 OM_uint32
 101 gss_krb5_compat_des3_mic(OM_uint32 *minor_status, gss_ctx_id_t ctx, int on)
 102 {
 103     *minor_status = 0;
 104
 105     if (on) {
 106         ctx->more_flags |= COMPAT_OLD_DES3;
 107     } else {
 108         ctx->more_flags &= ~COMPAT_OLD_DES3;
 109     }
 110     ctx->more_flags |= COMPAT_OLD_DES3_SELECTED;
 111
 112     return 0;
 113 }