1 /* $NetBSD: read_message.c,v 1.1.1.1 2011/04/13 18:15:37 elric Exp $ */ 2 3 /* 4 * Copyright (c) 1997 - 2001 Kungliga Tekniska Högskolan 5 * (Royal Institute of Technology, Stockholm, Sweden). 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * 3. Neither the name of the Institute nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #include "krb5_locl.h" 37 38 KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL 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_message (context); 53 return ret; 54 } 55 if(ret < 4) { 56 krb5_clear_error_message(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_message(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_message (context); 69 return ret; 70 } 71 return 0; 72 } 73 74 KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL 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_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL 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