Add patch that contain Mali fixes.
[deb_xorg-server.git] / os / mitauth.c
1 /*
2
3 Copyright 1988, 1998 The Open Group
4
5 Permission to use, copy, modify, distribute, and sell this software and its
6 documentation for any purpose is hereby granted without fee, provided that
7 the above copyright notice appear in all copies and that both that
8 copyright notice and this permission notice appear in supporting
9 documentation.
10
11 The above copyright notice and this permission notice shall be included
12 in all copies or substantial portions of the Software.
13
14 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
15 OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
16 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
17 IN NO EVENT SHALL THE OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR
18 OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
19 ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
20 OTHER DEALINGS IN THE SOFTWARE.
21
22 Except as contained in this notice, the name of The Open Group shall
23 not be used in advertising or otherwise to promote the sale, use or
24 other dealings in this Software without prior written authorization
25 from The Open Group.
26
27 */
28
29 /*
30 * MIT-MAGIC-COOKIE-1 authorization scheme
31 * Author: Keith Packard, MIT X Consortium
32 */
33
34 #ifdef HAVE_DIX_CONFIG_H
35 #include <dix-config.h>
36 #endif
37
38 #include <X11/X.h>
39 #include "os.h"
40 #include "osdep.h"
41 #include "dixstruct.h"
42
43 static struct auth {
44 struct auth *next;
45 unsigned short len;
46 char *data;
47 XID id;
48 } *mit_auth;
49
50 int
51 MitAddCookie(unsigned short data_length, const char *data, XID id)
52 {
53 struct auth *new;
54
55 new = malloc(sizeof(struct auth));
56 if (!new)
57 return 0;
58 new->data = malloc((unsigned) data_length);
59 if (!new->data) {
60 free(new);
61 return 0;
62 }
63 new->next = mit_auth;
64 mit_auth = new;
65 memmove(new->data, data, (int) data_length);
66 new->len = data_length;
67 new->id = id;
68 return 1;
69 }
70
71 XID
72 MitCheckCookie(unsigned short data_length,
73 const char *data, ClientPtr client, const char **reason)
74 {
75 struct auth *auth;
76
77 for (auth = mit_auth; auth; auth = auth->next) {
78 if (data_length == auth->len &&
79 memcmp(data, auth->data, (int) data_length) == 0)
80 return auth->id;
81 }
82 *reason = "Invalid MIT-MAGIC-COOKIE-1 key";
83 return (XID) -1;
84 }
85
86 int
87 MitResetCookie(void)
88 {
89 struct auth *auth, *next;
90
91 for (auth = mit_auth; auth; auth = next) {
92 next = auth->next;
93 free(auth->data);
94 free(auth);
95 }
96 mit_auth = 0;
97 return 0;
98 }
99
100 XID
101 MitToID(unsigned short data_length, char *data)
102 {
103 struct auth *auth;
104
105 for (auth = mit_auth; auth; auth = auth->next) {
106 if (data_length == auth->len &&
107 memcmp(data, auth->data, data_length) == 0)
108 return auth->id;
109 }
110 return (XID) -1;
111 }
112
113 int
114 MitFromID(XID id, unsigned short *data_lenp, char **datap)
115 {
116 struct auth *auth;
117
118 for (auth = mit_auth; auth; auth = auth->next) {
119 if (id == auth->id) {
120 *data_lenp = auth->len;
121 *datap = auth->data;
122 return 1;
123 }
124 }
125 return 0;
126 }
127
128 int
129 MitRemoveCookie(unsigned short data_length, const char *data)
130 {
131 struct auth *auth, *prev;
132
133 prev = 0;
134 for (auth = mit_auth; auth; prev = auth, auth = auth->next) {
135 if (data_length == auth->len &&
136 memcmp(data, auth->data, data_length) == 0) {
137 if (prev)
138 prev->next = auth->next;
139 else
140 mit_auth = auth->next;
141 free(auth->data);
142 free(auth);
143 return 1;
144 }
145 }
146 return 0;
147 }
148
149 #ifdef XCSECURITY
150
151 static char cookie[16]; /* 128 bits */
152
153 XID
154 MitGenerateCookie(unsigned data_length,
155 const char *data,
156 XID id, unsigned *data_length_return, char **data_return)
157 {
158 int i = 0;
159 int status;
160
161 while (data_length--) {
162 cookie[i++] += *data++;
163 if (i >= sizeof(cookie))
164 i = 0;
165 }
166 GenerateRandomData(sizeof(cookie), cookie);
167 status = MitAddCookie(sizeof(cookie), cookie, id);
168 if (!status) {
169 id = -1;
170 }
171 else {
172 *data_return = cookie;
173 *data_length_return = sizeof(cookie);
174 }
175 return id;
176 }
177
178 #endif /* XCSECURITY */