crypto/heimdal/lib/gssapi/import_name.c

   1 /*
   2  * Copyright (c) 1997 - 2001 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: import_name.c,v 1.11 2002/06/20 20:05:42 nectar Exp $");
  37
  38 static OM_uint32
  39 import_krb5_name (OM_uint32 *minor_status,
  40                   const gss_buffer_t input_name_buffer,
  41                   gss_name_t *output_name)
  42 {
  43     krb5_error_code kerr;
  44     char *tmp;
  45
  46     tmp = malloc (input_name_buffer->length + 1);
  47     if (tmp == NULL) {
  48         *minor_status = ENOMEM;
  49         return GSS_S_FAILURE;
  50     }
  51     memcpy (tmp,
  52             input_name_buffer->value,
  53             input_name_buffer->length);
  54     tmp[input_name_buffer->length] = '\0';
  55
  56     kerr = krb5_parse_name (gssapi_krb5_context,
  57                             tmp,
  58                             output_name);
  59     free (tmp);
  60     if (kerr == 0)
  61         return GSS_S_COMPLETE;
  62     else if (kerr == KRB5_PARSE_ILLCHAR || kerr == KRB5_PARSE_MALFORMED) {
  63         gssapi_krb5_set_error_string ();
  64         *minor_status = kerr;
  65         return GSS_S_BAD_NAME;
  66     } else {
  67         gssapi_krb5_set_error_string ();
  68         *minor_status = kerr;
  69         return GSS_S_FAILURE;
  70     }
  71 }
  72
  73 static OM_uint32
  74 import_hostbased_name (OM_uint32 *minor_status,
  75                        const gss_buffer_t input_name_buffer,
  76                        gss_name_t *output_name)
  77 {
  78     krb5_error_code kerr;
  79     char *tmp;
  80     char *p;
  81     char *host;
  82     char local_hostname[MAXHOSTNAMELEN];
  83
  84     tmp = malloc (input_name_buffer->length + 1);
  85     if (tmp == NULL) {
  86         *minor_status = ENOMEM;
  87         return GSS_S_FAILURE;
  88     }
  89     memcpy (tmp,
  90             input_name_buffer->value,
  91             input_name_buffer->length);
  92     tmp[input_name_buffer->length] = '\0';
  93
  94     p = strchr (tmp, '@');
  95     if (p != NULL) {
  96         *p = '\0';
  97         host = p + 1;
  98     } else {
  99         if (gethostname(local_hostname, sizeof(local_hostname)) < 0) {
 100             *minor_status = errno;
 101             free (tmp);
 102             return GSS_S_FAILURE;
 103         }
 104         host = local_hostname;
 105     }
 106
 107     kerr = krb5_sname_to_principal (gssapi_krb5_context,
 108                                     host,
 109                                     tmp,
 110                                     KRB5_NT_SRV_HST,
 111                                     output_name);
 112     free (tmp);
 113     *minor_status = kerr;
 114     if (kerr == 0)
 115         return GSS_S_COMPLETE;
 116     else if (kerr == KRB5_PARSE_ILLCHAR || kerr == KRB5_PARSE_MALFORMED) {
 117         gssapi_krb5_set_error_string ();
 118         *minor_status = kerr;
 119         return GSS_S_BAD_NAME;
 120     } else {
 121         gssapi_krb5_set_error_string ();
 122         *minor_status = kerr;
 123         return GSS_S_FAILURE;
 124     }
 125 }
 126
 127 static int
 128 oid_equal(const gss_OID a, const gss_OID b)
 129 {
 130         if (a == b)
 131                 return 1;
 132         else if (a == GSS_C_NO_OID || b == GSS_C_NO_OID || a->length != b->length)
 133                 return 0;
 134         else
 135                 return memcmp(a->elements, b->elements, a->length) == 0;
 136 }
 137
 138 OM_uint32 gss_import_name
 139            (OM_uint32 * minor_status,
 140             const gss_buffer_t input_name_buffer,
 141             const gss_OID input_name_type,
 142             gss_name_t * output_name
 143            )
 144 {
 145     gssapi_krb5_init ();
 146
 147     if (oid_equal(input_name_type, GSS_C_NT_HOSTBASED_SERVICE))
 148         return import_hostbased_name (minor_status,
 149                                       input_name_buffer,
 150                                       output_name);
 151     else if (input_name_type == GSS_C_NO_OID
 152              || oid_equal(input_name_type, GSS_C_NT_USER_NAME)
 153              || oid_equal(input_name_type, GSS_KRB5_NT_PRINCIPAL_NAME))
 154         /* default printable syntax */
 155         return import_krb5_name (minor_status,
 156                                  input_name_buffer,
 157                                  output_name);
 158     else {
 159         *minor_status = 0;
 160         return GSS_S_BAD_NAMETYPE;
 161     }
 162 }