Line data    Source code

       1             : /*
       2             :  * Copyright (c) 1997 - 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 "gsskrb5_locl.h"
      35             : 
      36             : void
      37       95238 : _gssapi_encap_length (size_t data_len,
      38             :                       size_t *len,
      39             :                       size_t *total_len,
      40             :                       const gss_OID mech)
      41             : {
      42             :     size_t len_len;
      43             : 
      44       95238 :     *len = 1 + 1 + mech->length + data_len;
      45             : 
      46       95238 :     len_len = der_length_len(*len);
      47             : 
      48       95238 :     *total_len = 1 + len_len + *len;
      49       95238 : }
      50             : 
      51             : void
      52       42474 : _gsskrb5_encap_length (size_t data_len,
      53             :                           size_t *len,
      54             :                           size_t *total_len,
      55             :                           const gss_OID mech)
      56             : {
      57       42474 :     _gssapi_encap_length(data_len + 2, len, total_len, mech);
      58       42474 : }
      59             : 
      60             : void *
      61       34003 : _gsskrb5_make_header (void *ptr,
      62             :                          size_t len,
      63             :                          const void *type,
      64             :                          const gss_OID mech)
      65             : {
      66       34003 :     u_char *p = ptr;
      67       34003 :     p = _gssapi_make_mech_header(p, len, mech);
      68       34003 :     memcpy (p, type, 2);
      69       34003 :     p += 2;
      70       34003 :     return p;
      71             : }
      72             : 
      73             : void *
      74       93346 : _gssapi_make_mech_header(void *ptr,
      75             :                          size_t len,
      76             :                          const gss_OID mech)
      77             : {
      78       93346 :     u_char *p = ptr;
      79             :     int e;
      80             :     size_t len_len, foo;
      81             : 
      82       93346 :     *p++ = 0x60;
      83       93346 :     len_len = der_length_len(len);
      84       93346 :     e = der_put_length (p + len_len - 1, len_len, len, &foo);
      85       93346 :     if(e || foo != len_len)
      86           0 :         abort ();
      87       93346 :     p += len_len;
      88       93346 :     *p++ = 0x06;
      89       93346 :     *p++ = mech->length;
      90       94630 :     memcpy (p, mech->elements, mech->length);
      91       93346 :     p += mech->length;
      92       93346 :     return p;
      93             : }
      94             : 
      95             : /*
      96             :  * Give it a krb5_data and it will encapsulate with extra GSS-API wrappings.
      97             :  */
      98             : 
      99             : OM_uint32
     100           0 : _gssapi_encapsulate(
     101             :     OM_uint32 *minor_status,
     102             :     const krb5_data *in_data,
     103             :     gss_buffer_t output_token,
     104             :     const gss_OID mech
     105             : )
     106             : {
     107             :     size_t len, outer_len;
     108             :     void *p;
     109             : 
     110           0 :     _gssapi_encap_length (in_data->length, &len, &outer_len, mech);
     111             : 
     112           0 :     output_token->length = outer_len;
     113           0 :     output_token->value  = malloc (outer_len);
     114           0 :     if (output_token->value == NULL) {
     115           0 :         *minor_status = ENOMEM;
     116           0 :         return GSS_S_FAILURE;
     117             :     }
     118             : 
     119           0 :     p = _gssapi_make_mech_header (output_token->value, len, mech);
     120           0 :     memcpy (p, in_data->data, in_data->length);
     121           0 :     return GSS_S_COMPLETE;
     122             : }
     123             : 
     124             : /*
     125             :  * Give it a krb5_data and it will encapsulate with extra GSS-API krb5
     126             :  * wrappings.
     127             :  */
     128             : 
     129             : OM_uint32
     130       34003 : _gsskrb5_encapsulate(
     131             :                         OM_uint32 *minor_status,
     132             :                         const krb5_data *in_data,
     133             :                         gss_buffer_t output_token,
     134             :                         const void *type,
     135             :                         const gss_OID mech
     136             : )
     137             : {
     138             :     size_t len, outer_len;
     139             :     u_char *p;
     140             : 
     141       34003 :     _gsskrb5_encap_length (in_data->length, &len, &outer_len, mech);
     142             : 
     143       34003 :     output_token->length = outer_len;
     144       34003 :     output_token->value  = malloc (outer_len);
     145       34003 :     if (output_token->value == NULL) {
     146           0 :         *minor_status = ENOMEM;
     147           0 :         return GSS_S_FAILURE;
     148             :     }
     149             : 
     150       34003 :     p = _gsskrb5_make_header (output_token->value, len, type, mech);
     151       35287 :     memcpy (p, in_data->data, in_data->length);
     152       34003 :     return GSS_S_COMPLETE;
     153             : }