1 /* 2 * Copyright (c) 1997 - 2001 Kungliga Tekniska H�gskolan 3 * (Royal Institute of Technology, Stockholm, Sweden). 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * 3. Neither the name of the Institute nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #include "krb5_locl.h" 35 36 RCSID("$Id: read_message.c,v 1.8 2001/05/14 06:14:51 assar Exp $"); 37 38 krb5_error_code 39 krb5_read_message (krb5_context context, 40 krb5_pointer p_fd, 41 krb5_data *data) 42 { 43 krb5_error_code ret; 44 u_int32_t len; 45 u_int8_t buf[4]; 46 47 ret = krb5_net_read (context, p_fd, buf, 4); 48 if(ret == -1) { 49 ret = errno; 50 krb5_clear_error_string (context); 51 return ret; 52 } 53 if(ret < 4) { 54 data->length = 0; 55 return HEIM_ERR_EOF; 56 } 57 len = (buf[0] << 24) | (buf[1] << 16) | (buf[2] << 8) | buf[3]; 58 ret = krb5_data_alloc (data, len); 59 if (ret) 60 return ret; 61 if (krb5_net_read (context, p_fd, data->data, len) != len) { 62 ret = errno; 63 krb5_data_free (data); 64 krb5_clear_error_string (context); 65 return ret; 66 } 67 return 0; 68 } 69 70 krb5_error_code 71 krb5_read_priv_message(krb5_context context, 72 krb5_auth_context ac, 73 krb5_pointer p_fd, 74 krb5_data *data) 75 { 76 krb5_error_code ret; 77 krb5_data packet; 78 79 ret = krb5_read_message(context, p_fd, &packet); 80 if(ret) 81 return ret; 82 ret = krb5_rd_priv (context, ac, &packet, data, NULL); 83 krb5_data_free(&packet); 84 return ret; 85 } 86 87 krb5_error_code 88 krb5_read_safe_message(krb5_context context, 89 krb5_auth_context ac, 90 krb5_pointer p_fd, 91 krb5_data *data) 92 { 93 krb5_error_code ret; 94 krb5_data packet; 95 96 ret = krb5_read_message(context, p_fd, &packet); 97 if(ret) 98 return ret; 99 ret = krb5_rd_safe (context, ac, &packet, data, NULL); 100 krb5_data_free(&packet); 101 return ret; 102 } 103