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
|
/*
* lib/krb5/keytab/file/ktf_get_en.c
*
* Copyright 1990 by the Massachusetts Institute of Technology.
* All Rights Reserved.
*
* Export of this software from the United States of America may
* require a specific license from the United States Government.
* It is the responsibility of any person or organization contemplating
* export to obtain such a license before exporting.
*
* WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
* distribute this software and its documentation for any purpose and
* without fee is hereby granted, provided that the above copyright
* notice appear in all copies and that both that copyright notice and
* this permission notice appear in supporting documentation, and that
* the name of M.I.T. not be used in advertising or publicity pertaining
* to distribution of the software without specific, written prior
* permission. M.I.T. makes no representations about the suitability of
* this software for any purpose. It is provided "as is" without express
* or implied warranty.
*
*
* This is the get_entry routine for the file based keytab implementation.
* It opens the keytab file, and either retrieves the entry or returns
* an error.
*/
#include "k5-int.h"
#include "ktfile.h"
krb5_error_code
krb5_ktfile_get_entry(context, id, principal, kvno, enctype, entry)
krb5_context context;
krb5_keytab id;
krb5_principal principal;
krb5_kvno kvno;
krb5_enctype enctype;
krb5_keytab_entry * entry;
{
krb5_keytab_entry cur_entry, new_entry;
krb5_error_code kerror = 0;
int found_wrong_kvno = 0;
/* Open the keyfile for reading */
if ((kerror = krb5_ktfileint_openr(context, id)))
return(kerror);
/*
* For efficiency and simplicity, we'll use a while true that
* is exited with a break statement.
*/
cur_entry.principal = 0;
cur_entry.vno = 0;
cur_entry.key.contents = 0;
while (TRUE) {
krb5_enctype entry_type;
if ((kerror = krb5_ktfileint_read_entry(context, id, &new_entry)))
break;
switch (enctype) {
case ENCTYPE_DES_CBC_CRC:
case ENCTYPE_DES_CBC_MD5:
case ENCTYPE_DES_CBC_MD4:
case ENCTYPE_DES_CBC_RAW:
enctype = ENCTYPE_DES_CBC_CRC;
break;
}
entry_type = new_entry.key.enctype;
switch(entry_type) {
case ENCTYPE_DES_CBC_CRC:
case ENCTYPE_DES_CBC_MD5:
case ENCTYPE_DES_CBC_MD4:
case ENCTYPE_DES_CBC_RAW:
entry_type = ENCTYPE_DES_CBC_CRC;
break;
}
if (((enctype == IGNORE_ENCTYPE)||
(entry_type == enctype))&&
krb5_principal_compare(context, principal, new_entry.principal)) {
if (kvno == IGNORE_VNO) {
if (! cur_entry.principal ||
(cur_entry.vno < new_entry.vno))
{
krb5_kt_free_entry(context, &cur_entry);
cur_entry = new_entry;
}
} else {
if (new_entry.vno == kvno) {
krb5_kt_free_entry(context, &cur_entry);
cur_entry = new_entry;
break;
} else
found_wrong_kvno++;
}
} else {
krb5_kt_free_entry(context, &new_entry);
}
}
if (kerror == KRB5_KT_END) {
if (cur_entry.principal)
kerror = 0;
else if (found_wrong_kvno)
kerror = KRB5_KT_KVNONOTFOUND;
else
kerror = KRB5_KT_NOTFOUND;
}
if (kerror) {
(void) krb5_ktfileint_close(context, id);
krb5_kt_free_entry(context, &cur_entry);
return kerror;
}
if ((kerror = krb5_ktfileint_close(context, id)) != 0) {
krb5_kt_free_entry(context, &cur_entry);
return kerror;
}
*entry = cur_entry;
return 0;
}
|
