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
131
132
133
134
135
136
137
138
139
|
/*
* g_svc_in_tkt.c
*
* Copyright 1987, 1988 by the Massachusetts Institute of Technology.
*
* For copying and distribution information, please see the file
* <mit-copyright.h>.
*/
#include "mit-copyright.h"
#include "krb.h"
#include "prot.h"
#include "krb4int.h"
#include <string.h>
#ifndef NULL
#define NULL 0
#endif
/*
* This file contains two routines: srvtab_to_key(), which gets
* a server's key from a srvtab file, and krb_get_svc_in_tkt() which
* gets an initial ticket for a server.
*/
/*
* srvtab_to_key(): given a "srvtab" file (where the keys for the
* service on a host are stored), return the private key of the
* given service (user.instance@realm).
*
* srvtab_to_key() passes its arguments on to read_service_key(),
* plus one additional argument, the key version number.
* (Currently, the key version number is always 0; this value
* is treated as a wildcard by read_service_key().)
*
* If the "srvtab" argument is null, KEYFILE (defined in "krb.h")
* is passed in its place.
*
* It returns the return value of the read_service_key() call.
* The service key is placed in "key".
*/
static int srvtab_to_key(user, instance, realm, srvtab, key)
char *user, *instance, *realm, *srvtab;
C_Block key;
{
if (!srvtab)
srvtab = KEYFILE;
return(read_service_key(user, instance, realm, 0, srvtab,
(char *)key));
}
/*
* krb_get_svc_in_tkt() passes its arguments on to krb_get_in_tkt(),
* plus two additional arguments: a pointer to the srvtab_to_key()
* function to be used to get the key from the key file and a NULL
* for the decryption procedure indicating that krb_get_in_tkt should
* use the default method of decrypting the response from the KDC.
*
* It returns the return value of the krb_get_in_tkt() call.
*/
int KRB5_CALLCONV
krb_get_svc_in_tkt(user, instance, realm, service, sinstance, life, srvtab)
char FAR *user, FAR *instance, FAR *realm, FAR *service, FAR *sinstance;
int life;
char FAR *srvtab;
{
return(krb_get_in_tkt(user, instance, realm, service, sinstance, life,
(key_proc_type) srvtab_to_key, NULL, srvtab));
}
/* and we need a preauth version as well. */
static C_Block old_key;
static int stub_key(user,instance,realm,passwd,key)
char *user, *instance, *realm, *passwd;
C_Block key;
{
memcpy(key, old_key, sizeof(C_Block));
return 0;
}
int
krb_get_svc_in_tkt_preauth(user, instance, realm, service, sinstance, life, srvtab)
char *user, *instance, *realm, *service, *sinstance;
int life;
char *srvtab;
{
char *preauth_p;
int preauth_len;
int ret_st;
krb_mk_preauth(&preauth_p, &preauth_len,
(key_proc_type) srvtab_to_key, user, instance, realm,
srvtab, old_key);
ret_st = krb_get_in_tkt_preauth(user,instance,realm,service,sinstance,life,
(key_proc_type) stub_key, NULL, srvtab,
preauth_p, preauth_len);
krb_free_preauth(preauth_p, preauth_len);
return ret_st;
}
/* DEC's dss-kerberos adds krb_svc_init; simple enough */
int
krb_svc_init(user,instance,realm,lifetime,srvtab_file,tkt_file)
char *user;
char *instance;
char *realm;
int lifetime;
char *srvtab_file;
char *tkt_file;
{
if (tkt_file)
krb_set_tkt_string(tkt_file);
return krb_get_svc_in_tkt(user,instance,realm,
"krbtgt",realm,lifetime,srvtab_file);
}
int
krb_svc_init_preauth(user,instance,realm,lifetime,srvtab_file,tkt_file)
char *user;
char *instance;
char *realm;
int lifetime;
char *srvtab_file;
char *tkt_file;
{
if (tkt_file)
krb_set_tkt_string(tkt_file);
return krb_get_svc_in_tkt_preauth(user,instance,realm,
"krbtgt",realm,lifetime,srvtab_file);
}
|
