a08e247c98
Changes in release 0.6.1 * Fixed ARCFOUR suppport * Cross realm vulnerability * kdc: fix denial of service attack * kdc: stop clients from renewing kerberos 4 tickets into the future * bug fixes
126 lines
4.0 KiB
C
126 lines
4.0 KiB
C
/*
|
|
* Copyright (c) 1997 - 2002 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_locl.h>
|
|
|
|
__RCSID("$Heimdal: mk_safe.c,v 1.28.4.1 2004/03/07 12:46:43 lha Exp $"
|
|
"$NetBSD: mk_safe.c,v 1.1.1.7 2004/04/02 14:47:52 lha Exp $");
|
|
|
|
krb5_error_code
|
|
krb5_mk_safe(krb5_context context,
|
|
krb5_auth_context auth_context,
|
|
const krb5_data *userdata,
|
|
krb5_data *outbuf,
|
|
/*krb5_replay_data*/ void *outdata)
|
|
{
|
|
krb5_error_code ret;
|
|
KRB_SAFE s;
|
|
int32_t sec, usec;
|
|
KerberosTime sec2;
|
|
int usec2;
|
|
u_char *buf = NULL;
|
|
size_t buf_size;
|
|
size_t len;
|
|
u_int32_t tmp_seq;
|
|
krb5_crypto crypto;
|
|
krb5_keyblock *key;
|
|
|
|
if (auth_context->local_subkey)
|
|
key = auth_context->local_subkey;
|
|
else if (auth_context->remote_subkey)
|
|
key = auth_context->remote_subkey;
|
|
else
|
|
key = auth_context->keyblock;
|
|
|
|
s.pvno = 5;
|
|
s.msg_type = krb_safe;
|
|
|
|
s.safe_body.user_data = *userdata;
|
|
krb5_us_timeofday (context, &sec, &usec);
|
|
|
|
sec2 = sec;
|
|
s.safe_body.timestamp = &sec2;
|
|
usec2 = usec;
|
|
s.safe_body.usec = &usec2;
|
|
if (auth_context->flags & KRB5_AUTH_CONTEXT_DO_SEQUENCE) {
|
|
tmp_seq = auth_context->local_seqnumber;
|
|
s.safe_body.seq_number = &tmp_seq;
|
|
} else
|
|
s.safe_body.seq_number = NULL;
|
|
|
|
s.safe_body.s_address = auth_context->local_address;
|
|
s.safe_body.r_address = auth_context->remote_address;
|
|
|
|
s.cksum.cksumtype = 0;
|
|
s.cksum.checksum.data = NULL;
|
|
s.cksum.checksum.length = 0;
|
|
|
|
ASN1_MALLOC_ENCODE(KRB_SAFE, buf, buf_size, &s, &len, ret);
|
|
if (ret)
|
|
return ret;
|
|
if(buf_size != len)
|
|
krb5_abortx(context, "internal error in ASN.1 encoder");
|
|
ret = krb5_crypto_init(context, key, 0, &crypto);
|
|
if (ret) {
|
|
free (buf);
|
|
return ret;
|
|
}
|
|
ret = krb5_create_checksum(context,
|
|
crypto,
|
|
KRB5_KU_KRB_SAFE_CKSUM,
|
|
0,
|
|
buf,
|
|
len,
|
|
&s.cksum);
|
|
krb5_crypto_destroy(context, crypto);
|
|
if (ret) {
|
|
free (buf);
|
|
return ret;
|
|
}
|
|
|
|
free(buf);
|
|
ASN1_MALLOC_ENCODE(KRB_SAFE, buf, buf_size, &s, &len, ret);
|
|
free_Checksum (&s.cksum);
|
|
if(ret)
|
|
return ret;
|
|
if(buf_size != len)
|
|
krb5_abortx(context, "internal error in ASN.1 encoder");
|
|
|
|
outbuf->length = len;
|
|
outbuf->data = buf;
|
|
if (auth_context->flags & KRB5_AUTH_CONTEXT_DO_SEQUENCE)
|
|
auth_context->local_seqnumber =
|
|
(auth_context->local_seqnumber + 1) & 0xFFFFFFFF;
|
|
return 0;
|
|
}
|