mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-26 11:47:31 +00:00
108 lines
2.8 KiB
C
108 lines
2.8 KiB
C
/*-
|
|
* Copyright (c) 2008 Doug Rabson
|
|
* 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.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#include <gssapi/gssapi.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
|
|
#include "utils.h"
|
|
|
|
OM_uint32
|
|
gss_decapsulate_token(const gss_buffer_t input_token, gss_OID oid,
|
|
gss_buffer_t output_token)
|
|
{
|
|
unsigned char *p = input_token->value;
|
|
size_t len = input_token->length;
|
|
size_t a, b;
|
|
gss_OID_desc mech_oid;
|
|
|
|
_gss_buffer_zero(output_token);
|
|
|
|
/*
|
|
* Token must start with [APPLICATION 0] SEQUENCE.
|
|
*/
|
|
if (len == 0 || *p != 0x60)
|
|
return (GSS_S_DEFECTIVE_TOKEN);
|
|
p++;
|
|
len--;
|
|
|
|
/*
|
|
* Decode the length and make sure it agrees with the
|
|
* token length.
|
|
*/
|
|
if (len == 0)
|
|
return (GSS_S_DEFECTIVE_TOKEN);
|
|
if ((*p & 0x80) == 0) {
|
|
a = *p;
|
|
p++;
|
|
len--;
|
|
} else {
|
|
b = *p & 0x7f;
|
|
p++;
|
|
len--;
|
|
if (len < b)
|
|
return (GSS_S_DEFECTIVE_TOKEN);
|
|
a = 0;
|
|
while (b) {
|
|
a = (a << 8) | *p;
|
|
p++;
|
|
len--;
|
|
b--;
|
|
}
|
|
}
|
|
if (a != len)
|
|
return (GSS_S_DEFECTIVE_TOKEN);
|
|
|
|
/*
|
|
* Decode the OID for the mechanism. Simplify life by
|
|
* assuming that the OID length is less than 128 bytes.
|
|
*/
|
|
if (len < 2 || *p != 0x06)
|
|
return (GSS_S_DEFECTIVE_TOKEN);
|
|
if ((p[1] & 0x80) || p[1] > (len - 2))
|
|
return (GSS_S_DEFECTIVE_TOKEN);
|
|
mech_oid.length = p[1];
|
|
p += 2;
|
|
len -= 2;
|
|
mech_oid.elements = p;
|
|
|
|
if (!gss_oid_equal(&mech_oid, oid))
|
|
return (GSS_S_FAILURE);
|
|
|
|
p += mech_oid.length;
|
|
len -= mech_oid.length;
|
|
|
|
output_token->length = len;
|
|
output_token->value = malloc(len);
|
|
if (!output_token->value)
|
|
return (GSS_S_DEFECTIVE_TOKEN);
|
|
memcpy(output_token->value, p, len);
|
|
|
|
return (GSS_S_COMPLETE);
|
|
}
|