lib/gssapi/krb5/import_name.c

   1 /*
   2  * Copyright (c) 1997 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. All advertising materials mentioning features or use of this software
  18  *    must display the following acknowledgement:
  19  *      This product includes software developed by Kungliga Tekniska
  20  *      Högskolan and its contributors.
  21  *
  22  * 4. Neither the name of the Institute nor the names of its contributors
  23  *    may be used to endorse or promote products derived from this software
  24  *    without specific prior written permission.
  25  *
  26  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
  27  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  28  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  29  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
  30  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  31  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  32  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  33  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  34  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  35  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  36  * SUCH DAMAGE.
  37  */
  38
  39 #include "gssapi_locl.h"
  40
  41 RCSID("$Id$");
  42
  43 static OM_uint32
  44 import_krb5_name (OM_uint32 *minor_status,
  45                   const gss_buffer_t input_name_buffer,
  46                   gss_name_t *output_name)
  47 {
  48     krb5_error_code kerr;
  49     char *tmp;
  50
  51     tmp = malloc (input_name_buffer->length + 1);
  52     if (tmp == NULL)
  53         return GSS_S_FAILURE;
  54     memcpy (tmp,
  55             input_name_buffer->value,
  56             input_name_buffer->length);
  57     tmp[input_name_buffer->length] = '\0';
  58
  59     kerr = krb5_parse_name (gssapi_krb5_context,
  60                             tmp,
  61                             output_name);
  62     free (tmp);
  63     if (kerr == 0)
  64         return GSS_S_COMPLETE;
  65     else if (kerr == KRB5_PARSE_ILLCHAR || kerr == KRB5_PARSE_MALFORMED)
  66         return GSS_S_BAD_NAME;
  67     else
  68         return GSS_S_FAILURE;
  69 }
  70
  71 static OM_uint32
  72 import_hostbased_name (OM_uint32 *minor_status,
  73                        const gss_buffer_t input_name_buffer,
  74                        gss_name_t *output_name)
  75 {
  76     krb5_error_code kerr;
  77     char *tmp;
  78     char *p;
  79     char *host;
  80     char local_hostname[MAXHOSTNAMELEN];
  81
  82     tmp = malloc (input_name_buffer->length + 1);
  83     if (tmp == NULL) {
  84         *minor_status = ENOMEM;
  85         return GSS_S_FAILURE;
  86     }
  87     memcpy (tmp,
  88             input_name_buffer->value,
  89             input_name_buffer->length);
  90     tmp[input_name_buffer->length] = '\0';
  91
  92     p = strchr (tmp, '@');
  93     if (p != NULL) {
  94         *p = '\0';
  95         host = p + 1;
  96     } else {
  97         if (gethostname(local_hostname, sizeof(local_hostname)) < 0) {
  98             *minor_status = errno;
  99             free (tmp);
 100             return GSS_S_FAILURE;
 101         }
 102         host = local_hostname;
 103     }
 104
 105     kerr = krb5_sname_to_principal (gssapi_krb5_context,
 106                                     host,
 107                                     tmp,
 108                                     KRB5_NT_SRV_HST,
 109                                     output_name);
 110     free (tmp);
 111     *minor_status = kerr;
 112     if (kerr == 0)
 113         return GSS_S_COMPLETE;
 114     else if (kerr == KRB5_PARSE_ILLCHAR || kerr == KRB5_PARSE_MALFORMED)
 115         return GSS_S_BAD_NAME;
 116     else
 117         return GSS_S_FAILURE;
 118 }
 119
 120 OM_uint32 gss_import_name
 121            (OM_uint32 * minor_status,
 122             const gss_buffer_t input_name_buffer,
 123             const gss_OID input_name_type,
 124             gss_name_t * output_name
 125            )
 126 {
 127     gssapi_krb5_init ();
 128
 129     if (input_name_type == GSS_C_NT_HOSTBASED_SERVICE)
 130         return import_hostbased_name (minor_status,
 131                                       input_name_buffer,
 132                                       output_name);
 133     else if (input_name_type == GSS_C_NO_OID
 134              || input_name_type == GSS_C_NT_USER_NAME
 135              || input_name_type == GSS_KRB5_NT_PRINCIPAL_NAME)
 136         /* default printable syntax */
 137         return import_krb5_name (minor_status,
 138                                  input_name_buffer,
 139                                  output_name);
 140     else
 141         return GSS_S_BAD_NAMETYPE;
 142 }