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
|
#include "module.h"
#include "misc.h"
#include "settings.h"
#include "irc-cap.h"
#include "irc-servers.h"
#include "sasl.h"
#define SASL_TIMEOUT (20 * 1000) // ms
static gboolean sasl_timeout (IRC_SERVER_REC *server)
{
/* The authentication timed out, we can't do much beside terminating it */
g_critical("The authentication timed out, try increasing the timeout and check your connection "
"to the network.");
irc_send_cmd_now(server, "AUTHENTICATE *");
cap_finish_negotiation(server);
server->sasl_timeout = -1;
return FALSE;
}
static void sasl_start (IRC_SERVER_REC *server, const char *data, const char *from)
{
IRC_SERVER_CONNECT_REC *conn;
conn = server->connrec;
switch (conn->sasl_mechanism) {
case SASL_MECHANISM_PLAIN:
irc_send_cmd_now(server, "AUTHENTICATE PLAIN");
break;
case SASL_MECHANISM_EXTERNAL:
irc_send_cmd_now(server, "AUTHENTICATE EXTERNAL");
break;
}
server->sasl_timeout = g_timeout_add(SASL_TIMEOUT, (GSourceFunc) sasl_timeout, server);
}
static void sasl_fail (IRC_SERVER_REC *server, const char *data, const char *from)
{
/* Stop any pending timeout, if any */
if (server->sasl_timeout != -1) {
g_source_remove(server->sasl_timeout);
server->sasl_timeout = -1;
}
g_critical("Authentication failed, make sure your credentials are correct and that the mechanism "
"you have selected is supported by this server.");
/* Terminate the negotiation */
cap_finish_negotiation(server);
}
static void sasl_already (IRC_SERVER_REC *server, const char *data, const char *from)
{
if (server->sasl_timeout != -1) {
g_source_remove(server->sasl_timeout);
server->sasl_timeout = -1;
}
/* We're already authenticated, do nothing */
cap_finish_negotiation(server);
}
static void sasl_success (IRC_SERVER_REC *server, const char *data, const char *from)
{
if (server->sasl_timeout != -1) {
g_source_remove(server->sasl_timeout);
server->sasl_timeout = -1;
}
/* The authentication succeeded, time to finish the CAP negotiation */
g_warning("SASL authentication succeeded");
cap_finish_negotiation(server);
}
static void sasl_step (IRC_SERVER_REC *server, const char *data, const char *from)
{
IRC_SERVER_CONNECT_REC *conn;
GString *req;
char *enc_req;
conn = server->connrec;
/* Stop the timer */
if (server->sasl_timeout != -1) {
g_source_remove(server->sasl_timeout);
server->sasl_timeout = -1;
}
switch (conn->sasl_mechanism) {
case SASL_MECHANISM_PLAIN:
/* At this point we assume that conn->{username, password} are non-NULL.
* The PLAIN mechanism expects a NULL-separated string composed by the authorization identity, the
* authentication identity and the password.
* The authorization identity field is optional and can be omitted, the server will derive the
* identity by looking at the credentials provided.
* The whole request is then encoded in base64. */
req = g_string_new(NULL);
g_string_append_c(req, '\0');
g_string_append(req, conn->sasl_username);
g_string_append_c(req, '\0');
g_string_append(req, conn->sasl_password);
enc_req = g_base64_encode((const guchar *)req->str, req->len);
irc_send_cmdv(server, "AUTHENTICATE %s", enc_req);
g_free(enc_req);
g_string_free(req, TRUE);
break;
case SASL_MECHANISM_EXTERNAL:
/* Empty response */
irc_send_cmdv(server, "+");
break;
}
/* We expect a response within a reasonable time */
server->sasl_timeout = g_timeout_add(SASL_TIMEOUT, (GSourceFunc) sasl_timeout, server);
}
void sasl_init(void)
{
signal_add_first("server cap ack sasl", (SIGNAL_FUNC) sasl_start);
signal_add_first("event authenticate", (SIGNAL_FUNC) sasl_step);
signal_add_first("event 900", (SIGNAL_FUNC) sasl_success);
signal_add_first("event 902", (SIGNAL_FUNC) sasl_fail);
signal_add_first("event 904", (SIGNAL_FUNC) sasl_fail);
signal_add_first("event 905", (SIGNAL_FUNC) sasl_fail);
signal_add_first("event 907", (SIGNAL_FUNC) sasl_already);
}
void sasl_deinit(void)
{
signal_remove("server cap ack sasl", (SIGNAL_FUNC) sasl_start);
signal_remove("event authenticate", (SIGNAL_FUNC) sasl_step);
signal_remove("event 900", (SIGNAL_FUNC) sasl_success);
signal_remove("event 902", (SIGNAL_FUNC) sasl_fail);
signal_remove("event 904", (SIGNAL_FUNC) sasl_fail);
signal_remove("event 905", (SIGNAL_FUNC) sasl_fail);
signal_remove("event 907", (SIGNAL_FUNC) sasl_already);
}
|
