1 /* 2 * Copyright (c) 1997 - 2001 Kungliga Tekniska Högskolan 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 KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL 37 krb5_read_message (krb5_context context, 38 krb5_pointer p_fd, 39 krb5_data *data) 40 { 41 krb5_error_code ret; 42 uint32_t len; 43 uint8_t buf[4]; 44 45 krb5_data_zero(data); 46 47 ret = krb5_net_read (context, p_fd, buf, 4); 48 if(ret == -1) { 49 ret = errno; 50 krb5_clear_error_message (context); 51 return ret; 52 } 53 if(ret < 4) { 54 krb5_clear_error_message(context); 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 krb5_clear_error_message(context); 61 return ret; 62 } 63 if (krb5_net_read (context, p_fd, data->data, len) != len) { 64 ret = errno; 65 krb5_data_free (data); 66 krb5_clear_error_message (context); 67 return ret; 68 } 69 return 0; 70 } 71 72 KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL 73 krb5_read_priv_message(krb5_context context, 74 krb5_auth_context ac, 75 krb5_pointer p_fd, 76 krb5_data *data) 77 { 78 krb5_error_code ret; 79 krb5_data packet; 80 81 ret = krb5_read_message(context, p_fd, &packet); 82 if(ret) 83 return ret; 84 ret = krb5_rd_priv (context, ac, &packet, data, NULL); 85 krb5_data_free(&packet); 86 return ret; 87 } 88 89 KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL 90 krb5_read_safe_message(krb5_context context, 91 krb5_auth_context ac, 92 krb5_pointer p_fd, 93 krb5_data *data) 94 { 95 krb5_error_code ret; 96 krb5_data packet; 97 98 ret = krb5_read_message(context, p_fd, &packet); 99 if(ret) 100 return ret; 101 ret = krb5_rd_safe (context, ac, &packet, data, NULL); 102 krb5_data_free(&packet); 103 return ret; 104 } 105