1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
|
/* This file is part of the Project Athena Zephyr Notification System.
* It contains source for the ZFormatAuthenticNotice function.
*
* Created by: Robert French
*
* $Id: ZFmtAuth.c 2502 2009-07-26 21:25:27Z kcr@ATHENA.MIT.EDU $
*
* Copyright (c) 1987,1988 by the Massachusetts Institute of Technology.
* For copying and distribution information, see the file
* "mit-copyright.h".
*/
#ifndef lint
static const char rcsid_ZFormatAuthenticNotice_c[] = "$Id: ZFmtAuth.c 2502 2009-07-26 21:25:27Z kcr@ATHENA.MIT.EDU $";
#endif
#include <internal.h>
#ifdef HAVE_KRB4
Code_t
ZFormatAuthenticNotice(ZNotice_t *notice,
char *buffer,
int buffer_len,
int *len,
C_Block session)
{
ZNotice_t newnotice;
char *ptr;
int retval, hdrlen;
newnotice = *notice;
newnotice.z_auth = 1;
newnotice.z_authent_len = 0;
newnotice.z_ascii_authent = "";
if ((retval = Z_FormatRawHeader(&newnotice, buffer, buffer_len,
&hdrlen, &ptr, NULL)) != ZERR_NONE)
return (retval);
newnotice.z_checksum =
(ZChecksum_t)des_quad_cksum((unsigned char *)buffer, NULL, ptr - buffer, 0, (C_Block *)session);
if ((retval = Z_FormatRawHeader(&newnotice, buffer, buffer_len,
&hdrlen, NULL, NULL)) != ZERR_NONE)
return (retval);
ptr = buffer+hdrlen;
if (newnotice.z_message_len+hdrlen > buffer_len)
return (ZERR_PKTLEN);
(void) memcpy(ptr, newnotice.z_message, newnotice.z_message_len);
*len = hdrlen+newnotice.z_message_len;
if (*len > Z_MAXPKTLEN)
return (ZERR_PKTLEN);
return (ZERR_NONE);
}
#endif
#ifdef HAVE_KRB5
Code_t
ZFormatAuthenticNoticeV5(ZNotice_t *notice,
register char *buffer,
register int buffer_len,
int *len,
krb5_keyblock *keyblock)
{
ZNotice_t newnotice;
char *ptr;
int retval, hdrlen, hdr_adj;
krb5_enctype enctype;
krb5_cksumtype cksumtype;
int key_len;
char *cksum_start, *cstart, *cend;
int cksum_len;
key_len = Z_keylen(keyblock);
retval = Z_ExtractEncCksum(keyblock, &enctype, &cksumtype);
if (retval)
return (ZAUTH_FAILED);
#ifdef HAVE_KRB4
if (key_len == 8 && (enctype == ENCTYPE_DES_CBC_CRC ||
enctype == ENCTYPE_DES_CBC_MD4 ||
enctype == ENCTYPE_DES_CBC_MD5)) {
C_Block tmp;
memcpy(&tmp, Z_keydata(keyblock), key_len);
return ZFormatAuthenticNotice(notice, buffer, buffer_len, len,
tmp);
}
#endif
newnotice = *notice;
newnotice.z_auth = 1;
newnotice.z_authent_len = 0;
newnotice.z_ascii_authent = "";
if ((retval = Z_NewFormatRawHeader(&newnotice, buffer, buffer_len,
&hdrlen,
&cksum_start, &cksum_len, &cstart,
&cend)) != ZERR_NONE)
return (retval);
/* we know this is only called by the server */
retval = Z_InsertZcodeChecksum(keyblock, &newnotice, buffer,
cksum_start, cksum_len, cstart, cend,
buffer_len, &hdr_adj, 1);
if (retval)
return retval;
hdrlen += hdr_adj;
ptr = buffer+hdrlen;
if (newnotice.z_message_len+hdrlen > buffer_len)
return (ZERR_PKTLEN);
(void) memcpy(ptr, newnotice.z_message, newnotice.z_message_len);
*len = hdrlen+newnotice.z_message_len;
if (*len > Z_MAXPKTLEN)
return (ZERR_PKTLEN);
return (ZERR_NONE);
}
#endif
|
