Files
heimdal/lib/kadm5/send_recv.c
Johan Danielsson fd92b75e07 (_kadm5_client_recv): handle arbitrarily sized packets, check for errors
git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@6122 ec53bebd-3082-4978-b11e-865c3cabbd6b
1999-05-04 10:18:50 +00:00

98 lines
3.4 KiB
C

/*
* Copyright (c) 1997, 1999 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Kungliga Tekniska
* Högskolan and its contributors.
*
* 4. 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 "kadm5_locl.h"
RCSID("$Id$");
kadm5_ret_t
_kadm5_client_send(kadm5_client_context *context, krb5_storage *sp)
{
krb5_data msg, out;
krb5_error_code ret;
unsigned char buf[1024];
size_t len;
len = sp->seek(sp, 0, SEEK_CUR);
sp->seek(sp, 0, SEEK_SET);
sp->fetch(sp, buf, len);
msg.data = buf;
msg.length = len;
ret = krb5_mk_priv(context->context, context->ac, &msg, &out, NULL);
if(ret){
return ret;
}
buf[0] = (out.length >> 24) & 0xff;
buf[1] = (out.length >> 16) & 0xff;
buf[2] = (out.length >> 8) & 0xff;
buf[3] = out.length & 0xff;
krb5_net_write(context->context, &context->sock, buf, 4);
krb5_net_write(context->context, &context->sock, out.data, out.length);
krb5_data_free(&out);
return 0;
}
kadm5_ret_t
_kadm5_client_recv(kadm5_client_context *context, krb5_storage *sp)
{
unsigned char *buf;
size_t len;
krb5_error_code ret;
krb5_data data, reply;
len = krb5_net_read(context->context, &context->sock, buf, 4);
if(len != 4)
return KADM5_RPC_ERROR;
len = (buf[0] << 24) | (buf[1] << 16) | (buf[2] << 8) | buf[3];
buf = malloc(len);
if(buf == NULL)
return ENOMEM;
if(krb5_net_read(context->context, &context->sock, buf, len) != len) {
free(buf);
return KADM5_RPC_ERROR;
}
data.length = len;
data.data = buf;
ret = krb5_rd_priv(context->context, context->ac, &data, &reply, NULL);
krb5_data_free(&data);
sp->store(sp, reply.data, reply.length);
sp->seek(sp, 0, SEEK_SET);
krb5_data_free(&reply);
return ret;
}