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 21750 2007-07-31 20:41:25Z lha $"); 37 38 krb5_error_code KRB5_LIB_FUNCTION 39 krb5_read_message (krb5_context context, 40 krb5_pointer p_fd, 41 krb5_data *data) 42 { 43 krb5_error_code ret; 44 uint32_t len; 45 uint8_t buf[4]; 46 47 krb5_data_zero(data); 48 49 ret = krb5_net_read (context, p_fd, buf, 4); 50 if(ret == -1) { 51 ret = errno; 52 krb5_clear_error_string (context); 53 return ret; 54 } 55 if(ret < 4) { 56 krb5_clear_error_string(context); 57 return HEIM_ERR_EOF; 58 } 59 len = (buf[0] << 24) | (buf[1] << 16) | (buf[2] << 8) | buf[3]; 60 ret = krb5_data_alloc (data, len); 61 if (ret) { 62 krb5_clear_error_string(context); 63 return ret; 64 } 65 if (krb5_net_read (context, p_fd, data->data, len) != len) { 66 ret = errno; 67 krb5_data_free (data); 68 krb5_clear_error_string (context); 69 return ret; 70 } 71 return 0; 72 } 73 74 krb5_error_code KRB5_LIB_FUNCTION 75 krb5_read_priv_message(krb5_context context, 76 krb5_auth_context ac, 77 krb5_pointer p_fd, 78 krb5_data *data) 79 { 80 krb5_error_code ret; 81 krb5_data packet; 82 83 ret = krb5_read_message(context, p_fd, &packet); 84 if(ret) 85 return ret; 86 ret = krb5_rd_priv (context, ac, &packet, data, NULL); 87 krb5_data_free(&packet); 88 return ret; 89 } 90 91 krb5_error_code KRB5_LIB_FUNCTION 92 krb5_read_safe_message(krb5_context context, 93 krb5_auth_context ac, 94 krb5_pointer p_fd, 95 krb5_data *data) 96 { 97 krb5_error_code ret; 98 krb5_data packet; 99 100 ret = krb5_read_message(context, p_fd, &packet); 101 if(ret) 102 return ret; 103 ret = krb5_rd_safe (context, ac, &packet, data, NULL); 104 krb5_data_free(&packet); 105 return ret; 106 } 107