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. 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 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         return GSS_S_FAILURE;
  49     memcpy (tmp,
  50             input_name_buffer->value,
  51             input_name_buffer->length);
  52     tmp[input_name_buffer->length] = '\0';
  53
  54     kerr = krb5_parse_name (gssapi_krb5_context,
  55                             tmp,
  56                             output_name);
  57     free (tmp);
  58     if (kerr == 0)
  59         return GSS_S_COMPLETE;
  60     else if (kerr == KRB5_PARSE_ILLCHAR || kerr == KRB5_PARSE_MALFORMED)
  61         return GSS_S_BAD_NAME;
  62     else
  63         return GSS_S_FAILURE;
  64 }
  65
  66 static OM_uint32
  67 import_hostbased_name (OM_uint32 *minor_status,
  68                        const gss_buffer_t input_name_buffer,
  69                        gss_name_t *output_name)
  70 {
  71     krb5_error_code kerr;
  72     char *tmp;
  73     char *p;
  74     char *host;
  75     char local_hostname[MAXHOSTNAMELEN];
  76
  77     tmp = malloc (input_name_buffer->length + 1);
  78     if (tmp == NULL) {
  79         *minor_status = ENOMEM;
  80         return GSS_S_FAILURE;
  81     }
  82     memcpy (tmp,
  83             input_name_buffer->value,
  84             input_name_buffer->length);
  85     tmp[input_name_buffer->length] = '\0';
  86
  87     p = strchr (tmp, '@');
  88     if (p != NULL) {
  89         *p = '\0';
  90         host = p + 1;
  91     } else {
  92         if (gethostname(local_hostname, sizeof(local_hostname)) < 0) {
  93             *minor_status = errno;
  94             free (tmp);
  95             return GSS_S_FAILURE;
  96         }
  97         host = local_hostname;
  98     }
  99
 100     kerr = krb5_sname_to_principal (gssapi_krb5_context,
 101                                     host,
 102                                     tmp,
 103                                     KRB5_NT_SRV_HST,
 104                                     output_name);
 105     free (tmp);
 106     *minor_status = kerr;
 107     if (kerr == 0)
 108         return GSS_S_COMPLETE;
 109     else if (kerr == KRB5_PARSE_ILLCHAR || kerr == KRB5_PARSE_MALFORMED)
 110         return GSS_S_BAD_NAME;
 111     else
 112         return GSS_S_FAILURE;
 113 }
 114
 115 OM_uint32 gss_import_name
 116            (OM_uint32 * minor_status,
 117             const gss_buffer_t input_name_buffer,
 118             const gss_OID input_name_type,
 119             gss_name_t * output_name
 120            )
 121 {
 122     gssapi_krb5_init ();
 123
 124     if (input_name_type == GSS_C_NT_HOSTBASED_SERVICE)
 125         return import_hostbased_name (minor_status,
 126                                       input_name_buffer,
 127                                       output_name);
 128     else if (input_name_type == GSS_C_NO_OID
 129              || input_name_type == GSS_C_NT_USER_NAME
 130              || input_name_type == GSS_KRB5_NT_PRINCIPAL_NAME)
 131         /* default printable syntax */
 132         return import_krb5_name (minor_status,
 133                                  input_name_buffer,
 134                                  output_name);
 135     else
 136         return GSS_S_BAD_NAMETYPE;
 137 }