125 lines
3.7 KiB
C
125 lines
3.7 KiB
C
/*
|
|
* Copyright (c) 1997 - 2001 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("$Id: rd_rep.c 17890 2006-08-21 09:19:22Z lha $");
|
|
|
|
krb5_error_code KRB5_LIB_FUNCTION
|
|
krb5_rd_rep(krb5_context context,
|
|
krb5_auth_context auth_context,
|
|
const krb5_data *inbuf,
|
|
krb5_ap_rep_enc_part **repl)
|
|
{
|
|
krb5_error_code ret;
|
|
AP_REP ap_rep;
|
|
size_t len;
|
|
krb5_data data;
|
|
krb5_crypto crypto;
|
|
|
|
krb5_data_zero (&data);
|
|
ret = 0;
|
|
|
|
ret = decode_AP_REP(inbuf->data, inbuf->length, &ap_rep, &len);
|
|
if (ret)
|
|
return ret;
|
|
if (ap_rep.pvno != 5) {
|
|
ret = KRB5KRB_AP_ERR_BADVERSION;
|
|
krb5_clear_error_string (context);
|
|
goto out;
|
|
}
|
|
if (ap_rep.msg_type != krb_ap_rep) {
|
|
ret = KRB5KRB_AP_ERR_MSG_TYPE;
|
|
krb5_clear_error_string (context);
|
|
goto out;
|
|
}
|
|
|
|
ret = krb5_crypto_init(context, auth_context->keyblock, 0, &crypto);
|
|
if (ret)
|
|
goto out;
|
|
ret = krb5_decrypt_EncryptedData (context,
|
|
crypto,
|
|
KRB5_KU_AP_REQ_ENC_PART,
|
|
&ap_rep.enc_part,
|
|
&data);
|
|
krb5_crypto_destroy(context, crypto);
|
|
if (ret)
|
|
goto out;
|
|
|
|
*repl = malloc(sizeof(**repl));
|
|
if (*repl == NULL) {
|
|
ret = ENOMEM;
|
|
krb5_set_error_string (context, "malloc: out of memory");
|
|
goto out;
|
|
}
|
|
ret = krb5_decode_EncAPRepPart(context,
|
|
data.data,
|
|
data.length,
|
|
*repl,
|
|
&len);
|
|
if (ret)
|
|
return ret;
|
|
|
|
if (auth_context->flags & KRB5_AUTH_CONTEXT_DO_TIME) {
|
|
if ((*repl)->ctime != auth_context->authenticator->ctime ||
|
|
(*repl)->cusec != auth_context->authenticator->cusec)
|
|
{
|
|
krb5_free_ap_rep_enc_part(context, *repl);
|
|
*repl = NULL;
|
|
ret = KRB5KRB_AP_ERR_MUT_FAIL;
|
|
krb5_clear_error_string (context);
|
|
goto out;
|
|
}
|
|
}
|
|
if ((*repl)->seq_number)
|
|
krb5_auth_con_setremoteseqnumber(context, auth_context,
|
|
*((*repl)->seq_number));
|
|
if ((*repl)->subkey)
|
|
krb5_auth_con_setremotesubkey(context, auth_context, (*repl)->subkey);
|
|
|
|
out:
|
|
krb5_data_free (&data);
|
|
free_AP_REP (&ap_rep);
|
|
return ret;
|
|
}
|
|
|
|
void KRB5_LIB_FUNCTION
|
|
krb5_free_ap_rep_enc_part (krb5_context context,
|
|
krb5_ap_rep_enc_part *val)
|
|
{
|
|
if (val) {
|
|
free_EncAPRepPart (val);
|
|
free (val);
|
|
}
|
|
}
|