read_message.c revision 178825
1331722Seadler/* 2256694Snp * Copyright (c) 1997 - 2001 Kungliga Tekniska H�gskolan 3256694Snp * (Royal Institute of Technology, Stockholm, Sweden). 4256694Snp * All rights reserved. 5256694Snp * 6256694Snp * Redistribution and use in source and binary forms, with or without 7256694Snp * modification, are permitted provided that the following conditions 8256694Snp * are met: 9256694Snp * 10256694Snp * 1. Redistributions of source code must retain the above copyright 11256694Snp * notice, this list of conditions and the following disclaimer. 12256694Snp * 13256694Snp * 2. Redistributions in binary form must reproduce the above copyright 14256694Snp * notice, this list of conditions and the following disclaimer in the 15256694Snp * documentation and/or other materials provided with the distribution. 16256694Snp * 17256694Snp * 3. Neither the name of the Institute nor the names of its contributors 18256694Snp * may be used to endorse or promote products derived from this software 19256694Snp * without specific prior written permission. 20256694Snp * 21256694Snp * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND 22256694Snp * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23256694Snp * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24256694Snp * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE 25256694Snp * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26256694Snp * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27256694Snp * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28256694Snp * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29256694Snp * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30256694Snp * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31256694Snp * SUCH DAMAGE. 32256694Snp */ 33256694Snp 34256694Snp#include "krb5_locl.h" 35256694Snp 36331769ShselaskyRCSID("$Id: read_message.c 21750 2007-07-31 20:41:25Z lha $"); 37331769Shselasky 38256694Snpkrb5_error_code KRB5_LIB_FUNCTION 39256694Snpkrb5_read_message (krb5_context context, 40256694Snp krb5_pointer p_fd, 41256694Snp krb5_data *data) 42256694Snp{ 43256694Snp krb5_error_code ret; 44256694Snp uint32_t len; 45256694Snp uint8_t buf[4]; 46256694Snp 47256694Snp krb5_data_zero(data); 48256694Snp 49256694Snp ret = krb5_net_read (context, p_fd, buf, 4); 50256694Snp if(ret == -1) { 51256694Snp ret = errno; 52256694Snp krb5_clear_error_string (context); 53256694Snp return ret; 54256694Snp } 55256694Snp if(ret < 4) { 56256694Snp krb5_clear_error_string(context); 57256694Snp return HEIM_ERR_EOF; 58256694Snp } 59256694Snp len = (buf[0] << 24) | (buf[1] << 16) | (buf[2] << 8) | buf[3]; 60256694Snp ret = krb5_data_alloc (data, len); 61256694Snp if (ret) { 62256694Snp krb5_clear_error_string(context); 63256694Snp return ret; 64318798Snp } 65331769Shselasky if (krb5_net_read (context, p_fd, data->data, len) != len) { 66331769Shselasky ret = errno; 67256694Snp krb5_data_free (data); 68256694Snp krb5_clear_error_string (context); 69256694Snp return ret; 70256694Snp } 71256694Snp return 0; 72256694Snp} 73256694Snp 74256694Snpkrb5_error_code KRB5_LIB_FUNCTION 75256694Snpkrb5_read_priv_message(krb5_context context, 76256694Snp krb5_auth_context ac, 77256694Snp krb5_pointer p_fd, 78256694Snp krb5_data *data) 79256694Snp{ 80256694Snp krb5_error_code ret; 81256694Snp krb5_data packet; 82256694Snp 83256694Snp ret = krb5_read_message(context, p_fd, &packet); 84256694Snp if(ret) 85256694Snp return ret; 86256694Snp ret = krb5_rd_priv (context, ac, &packet, data, NULL); 87256694Snp krb5_data_free(&packet); 88256694Snp return ret; 89256694Snp} 90256694Snp 91256694Snpkrb5_error_code KRB5_LIB_FUNCTION 92256694Snpkrb5_read_safe_message(krb5_context context, 93256694Snp krb5_auth_context ac, 94256694Snp krb5_pointer p_fd, 95256694Snp krb5_data *data) 96256694Snp{ 97256694Snp krb5_error_code ret; 98256694Snp krb5_data packet; 99256694Snp 100256694Snp ret = krb5_read_message(context, p_fd, &packet); 101331769Shselasky if(ret) 102331769Shselasky return ret; 103331769Shselasky ret = krb5_rd_safe (context, ac, &packet, data, NULL); 104256694Snp krb5_data_free(&packet); 105331769Shselasky return ret; 106331769Shselasky} 107331769Shselasky