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/*
* Copyright (c) 1997 - 2003 Kungliga Tekniska Högskolan
* (Royal Institute of Technology, Stockholm, Sweden).
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include "krb5/gsskrb5_locl.h"
RCSID("$Id: encapsulate.c,v 1.12 2006/10/14 10:02:56 lha Exp $");
void
_gssapi_encap_length (size_t data_len,
size_t *len,
size_t *total_len,
const gss_OID mech)
{
size_t len_len;
*len = 1 + 1 + mech->length + data_len;
len_len = der_length_len(*len);
*total_len = 1 + len_len + *len;
}
void
_gsskrb5_encap_length (size_t data_len,
size_t *len,
size_t *total_len,
const gss_OID mech)
{
_gssapi_encap_length(data_len + 2, len, total_len, mech);
}
void *
_gsskrb5_make_header (void *ptr,
size_t len,
const void *type,
const gss_OID mech)
{
u_char *p = ptr;
p = _gssapi_make_mech_header(p, len, mech);
memcpy (p, type, 2);
p += 2;
return p;
}
void *
_gssapi_make_mech_header(void *ptr,
size_t len,
const gss_OID mech)
{
u_char *p = ptr;
int e;
size_t len_len, foo;
*p++ = 0x60;
len_len = der_length_len(len);
e = der_put_length (p + len_len - 1, len_len, len, &foo);
if(e || foo != len_len)
abort ();
p += len_len;
*p++ = 0x06;
*p++ = mech->length;
memcpy (p, mech->elements, mech->length);
p += mech->length;
return p;
}
/*
* Give it a krb5_data and it will encapsulate with extra GSS-API wrappings.
*/
OM_uint32
_gssapi_encapsulate(
OM_uint32 *minor_status,
const krb5_data *in_data,
gss_buffer_t output_token,
const gss_OID mech
)
{
size_t len, outer_len;
void *p;
_gssapi_encap_length (in_data->length, &len, &outer_len, mech);
output_token->length = outer_len;
output_token->value = malloc (outer_len);
if (output_token->value == NULL) {
*minor_status = ENOMEM;
return GSS_S_FAILURE;
}
p = _gssapi_make_mech_header (output_token->value, len, mech);
memcpy (p, in_data->data, in_data->length);
return GSS_S_COMPLETE;
}
/*
* Give it a krb5_data and it will encapsulate with extra GSS-API krb5
* wrappings.
*/
OM_uint32
_gsskrb5_encapsulate(
OM_uint32 *minor_status,
const krb5_data *in_data,
gss_buffer_t output_token,
const void *type,
const gss_OID mech
)
{
size_t len, outer_len;
u_char *p;
_gsskrb5_encap_length (in_data->length, &len, &outer_len, mech);
output_token->length = outer_len;
output_token->value = malloc (outer_len);
if (output_token->value == NULL) {
*minor_status = ENOMEM;
return GSS_S_FAILURE;
}
p = _gsskrb5_make_header (output_token->value, len, type, mech);
memcpy (p, in_data->data, in_data->length);
return GSS_S_COMPLETE;
}
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