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
36KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
37krb5_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
72KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
73krb5_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
89KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
90krb5_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