1 /* 2 * Copyright (c) 1997, 1998 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 1.7 2000/07/21 22:54:09 joda 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 return errno; 50 if(ret < 4) { 51 data->length = 0; 52 return HEIM_ERR_EOF; 53 } 54 len = (buf[0] << 24) | (buf[1] << 16) | (buf[2] << 8) | buf[3]; 55 ret = krb5_data_alloc (data, len); 56 if (ret) 57 return ret; 58 if (krb5_net_read (context, p_fd, data->data, len) != len) { 59 krb5_data_free (data); 60 return errno; 61 } 62 return 0; 63 } 64 65 krb5_error_code 66 krb5_read_priv_message(krb5_context context, 67 krb5_auth_context ac, 68 krb5_pointer p_fd, 69 krb5_data *data) 70 { 71 krb5_error_code ret; 72 krb5_data packet; 73 74 ret = krb5_read_message(context, p_fd, &packet); 75 if(ret) 76 return ret; 77 ret = krb5_rd_priv (context, ac, &packet, data, NULL); 78 krb5_data_free(&packet); 79 if(ret) 80 return ret; 81 return ret; 82 } 83 84 krb5_error_code 85 krb5_read_safe_message(krb5_context context, 86 krb5_auth_context ac, 87 krb5_pointer p_fd, 88 krb5_data *data) 89 { 90 krb5_error_code ret; 91 krb5_data packet; 92 93 ret = krb5_read_message(context, p_fd, &packet); 94 if(ret) 95 return ret; 96 ret = krb5_rd_safe (context, ac, &packet, data, NULL); 97 krb5_data_free(&packet); 98 if(ret) 99 return ret; 100 return ret; 101 } 102