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/*
* SASL authentication plugin for XChat
* Extremely primitive: only PLAIN, no error checking
*
* Copyright (c) 2010, <ygrek@autistici.org>
* http://ygrek.org.ua/p/cap_sasl.html
*
* Docs:
* http://hg.atheme.org/charybdis/charybdis/file/6144f52a119b/doc/sasl.txt
* http://tools.ietf.org/html/rfc4422
*/
#include <string.h>
#include <stdlib.h>
#include <assert.h>
#include <glib/gbase64.h>
#include "xchat-plugin.h"
#define PNAME "XSASL"
#define PDESC "SASL authentication plugin";
#define PVERSION "0.0.4"
static xchat_plugin *ph; /* plugin handle */
struct sasl_info;
struct sasl_info
{
char const* login;
char const* password;
char const* network;
struct sasl_info* next;
};
typedef struct sasl_info sasl_info;
sasl_info* all_info = NULL;
static void add_info(char const* login, char const* password, char const* network)
{
sasl_info* prev = all_info;
sasl_info* info = (sasl_info*)malloc(sizeof(sasl_info));
info->login = strdup(login);
info->password = strdup(password);
info->network = strdup(network);
info->next = prev;
all_info = info;
}
static sasl_info* find_info(char const* network)
{
sasl_info* cur = all_info;
while (cur)
{
if (0 == strcmp(cur->network, network)) return cur;
cur = cur->next;
}
return NULL;
}
static sasl_info* get_info(void)
{
const char* name = xchat_get_info(ph, "network");
if (name)
return find_info(name);
else
return NULL;
}
static int authend_cb(char *word[], char *word_eol[], void *userdata)
{
if (get_info())
{
xchat_printf(ph, "XSASL result: %s", word_eol[1]);
xchat_commandf(ph, "QUOTE CAP END");
}
return XCHAT_EAT_ALL;
}
/*
static int disconnect_cb(char *word[], void *userdata)
{
xchat_printf(ph, "disconnected");
return XCHAT_EAT_NONE;
}
*/
static int server_cb(char *word[], char *word_eol[], void *userdata)
{
if (0 == strcmp("AUTHENTICATE",word[1]) && 0 == strcmp("+",word[2]))
{
size_t len;
char* buf;
char* enc;
sasl_info* p = get_info();
if (!p) return XCHAT_EAT_NONE;
xchat_printf(ph,"XSASL authenticating as %s",p->login);
len = strlen(p->login)*2 + 2 + strlen(p->password);
buf = (char*)malloc(len + 1);
strcpy(buf,p->login);
strcpy(buf+strlen(p->login)+1,p->login);
strcpy(buf+strlen(p->login)*2+2,p->password);
enc = g_base64_encode((unsigned char*)buf,len);
/*xchat_printf(ph,"AUTHENTICATE %s",enc);*/
xchat_commandf(ph,"QUOTE AUTHENTICATE %s",enc);
free(enc);
free(buf);
return XCHAT_EAT_ALL;
}
return XCHAT_EAT_NONE;
}
static int cap_cb(char *word[], char *word_eol[], void *userdata)
{
if (get_info())
{
/* FIXME test sasl cap */
xchat_printf(ph, "XSASL info: %s", word_eol[1]);
xchat_commandf(ph,"QUOTE AUTHENTICATE PLAIN");
}
return XCHAT_EAT_ALL;
}
static int sasl_cmd_cb(char *word[], char *word_eol[], void *userdata)
{
const char* login = word[2];
const char* password = word[3];
const char* network = word_eol[4];
if (!login || !*login)
{
sasl_info *cur = all_info;
if (NULL == cur)
{
xchat_printf(ph,"Nothing, see /help sasl");
return XCHAT_EAT_ALL;
}
while (cur)
{
xchat_printf(ph,"%s:%s at %s",cur->login,cur->password,cur->network);
cur = cur->next;
}
return XCHAT_EAT_ALL;
}
if (!login || !password || !network || !*login || !*password || !*network)
{
xchat_printf(ph,"Wrong usage, try /help sasl");
return XCHAT_EAT_ALL;
}
add_info(login,password,network);
xchat_printf(ph,"Enabled SASL authentication for %s",network);
return XCHAT_EAT_ALL;
}
static int connect_cb(char *word[], void *userdata)
{
if (get_info())
{
xchat_printf(ph, "XSASL enabled");
xchat_commandf(ph, "QUOTE CAP REQ :sasl");
}
return XCHAT_EAT_NONE;
}
int xchat_plugin_init(xchat_plugin *plugin_handle,
char **plugin_name,
char **plugin_desc,
char **plugin_version,
char *arg)
{
/* we need to save this for use with any xchat_* functions */
ph = plugin_handle;
/* tell xchat our info */
*plugin_name = PNAME;
*plugin_desc = PDESC;
*plugin_version = PVERSION;
xchat_hook_command(ph, "sasl", XCHAT_PRI_NORM, sasl_cmd_cb,
"Usage: SASL <login> <password> <network>, enable SASL authentication for given network", 0);
xchat_hook_print(ph, "Connected", XCHAT_PRI_NORM, connect_cb, NULL);
/*
xchat_hook_print(ph, "Disconnected", XCHAT_PRI_NORM, disconnect_cb, NULL);
*/
xchat_hook_server(ph, "CAP", XCHAT_PRI_NORM, cap_cb, NULL);
xchat_hook_server(ph, "RAW LINE", XCHAT_PRI_NORM, server_cb, NULL);
xchat_hook_server(ph, "903", XCHAT_PRI_NORM, authend_cb, NULL);
xchat_hook_server(ph, "904", XCHAT_PRI_NORM, authend_cb, NULL);
xchat_hook_server(ph, "905", XCHAT_PRI_NORM, authend_cb, NULL);
xchat_hook_server(ph, "906", XCHAT_PRI_NORM, authend_cb, NULL);
xchat_hook_server(ph, "907", XCHAT_PRI_NORM, authend_cb, NULL);
/* xchat_print(ph,"Loading cap_sasl.conf");
xchat_commandf(ph, "load -e %s/cap_sasl.conf",xchat_get_info(ph, "xchatdir")); */
xchat_printf(ph, PNAME " plugin loaded\n");
return 1;
}
int xchat_plugin_deinit (void)
{
xchat_printf(ph, PNAME " plugin unloaded\n");
return 1;
}
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