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
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
|
/* -*- mode: c; c-basic-offset: 4; indent-tabs-mode: nil -*- */
/*
* lib/krb5/rcache/rc_base.c
*
* This file of the Kerberos V5 software is derived from public-domain code
* contributed by Daniel J. Bernstein, <brnstnd@acf10.nyu.edu>.
*
*/
/*
* Base "glue" functions for the replay cache.
*/
#include "rc_base.h"
#include "rc-int.h"
#include "k5-thread.h"
struct krb5_rc_typelist {
const krb5_rc_ops *ops;
struct krb5_rc_typelist *next;
};
static struct krb5_rc_typelist none = { &krb5_rc_none_ops, 0 };
static struct krb5_rc_typelist krb5_rc_typelist_dfl = { &krb5_rc_dfl_ops, &none };
static struct krb5_rc_typelist *typehead = &krb5_rc_typelist_dfl;
static k5_mutex_t rc_typelist_lock = K5_MUTEX_PARTIAL_INITIALIZER;
int
krb5int_rc_finish_init(void)
{
return k5_mutex_finish_init(&rc_typelist_lock);
}
void
krb5int_rc_terminate(void)
{
struct krb5_rc_typelist *t, *t_next;
k5_mutex_destroy(&rc_typelist_lock);
for (t = typehead; t != &krb5_rc_typelist_dfl; t = t_next) {
t_next = t->next;
free(t);
}
}
krb5_error_code
krb5_rc_register_type(krb5_context context, const krb5_rc_ops *ops)
{
struct krb5_rc_typelist *t;
krb5_error_code err;
err = k5_mutex_lock(&rc_typelist_lock);
if (err)
return err;
for (t = typehead;t && strcmp(t->ops->type,ops->type);t = t->next)
;
if (t) {
k5_mutex_unlock(&rc_typelist_lock);
return KRB5_RC_TYPE_EXISTS;
}
t = (struct krb5_rc_typelist *) malloc(sizeof(struct krb5_rc_typelist));
if (t == NULL) {
k5_mutex_unlock(&rc_typelist_lock);
return KRB5_RC_MALLOC;
}
t->next = typehead;
t->ops = ops;
typehead = t;
k5_mutex_unlock(&rc_typelist_lock);
return 0;
}
krb5_error_code
krb5_rc_resolve_type(krb5_context context, krb5_rcache *idptr, char *type)
{
struct krb5_rc_typelist *t;
krb5_error_code err;
krb5_rcache id;
*idptr = NULL;
/* Find the named type in the list. */
err = k5_mutex_lock(&rc_typelist_lock);
if (err)
return err;
for (t = typehead; t && strcmp(t->ops->type, type); t = t->next)
;
k5_mutex_unlock(&rc_typelist_lock);
if (!t)
return KRB5_RC_TYPE_NOTFOUND;
/* Create and return the rcache structure. */
id = malloc(sizeof(*id));
if (!id)
return KRB5_RC_MALLOC;
err = k5_mutex_init(&id->lock);
if (err) {
free(id);
return err;
}
id->data = NULL; /* Gets real data when resolved */
id->magic = 0; /* Gets real magic after resolved */
id->ops = t->ops;
*idptr = id;
return 0;
}
char * krb5_rc_get_type(krb5_context context, krb5_rcache id)
{
return id->ops->type;
}
char *
krb5_rc_default_type(krb5_context context)
{
char *s;
if ((s = getenv("KRB5RCACHETYPE")))
return s;
else
return "dfl";
}
char *
krb5_rc_default_name(krb5_context context)
{
char *s;
if ((s = getenv("KRB5RCACHENAME")))
return s;
else
return (char *) 0;
}
krb5_error_code
krb5_rc_default(krb5_context context, krb5_rcache *idptr)
{
krb5_error_code retval;
krb5_rcache id;
*idptr = NULL;
retval = krb5_rc_resolve_type(context, &id, krb5_rc_default_type(context));
if (retval)
return retval;
retval = krb5_rc_resolve(context, id, krb5_rc_default_name(context));
if (retval) {
k5_mutex_destroy(&id->lock);
free(id);
return retval;
}
id->magic = KV5M_RCACHE;
*idptr = id;
return retval;
}
krb5_error_code
krb5_rc_resolve_full(krb5_context context, krb5_rcache *idptr,
char *string_name)
{
char *type;
char *residual;
krb5_error_code retval;
unsigned int diff;
krb5_rcache id;
*idptr = NULL;
if (!(residual = strchr(string_name,':')))
return KRB5_RC_PARSE;
diff = residual - string_name;
if (!(type = malloc(diff + 1)))
return KRB5_RC_MALLOC;
(void) strncpy(type, string_name, diff);
type[residual - string_name] = '\0';
retval = krb5_rc_resolve_type(context, &id,type);
free(type);
if (retval)
return retval;
if ((retval = krb5_rc_resolve(context, id,residual + 1))) {
k5_mutex_destroy(&id->lock);
free(id);
return retval;
}
id->magic = KV5M_RCACHE;
*idptr = id;
return retval;
}
|
