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/*******************************************************************************
* Copyright (C) 2009 Nathaniel McCallum <nathaniel@natemccallum.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
******************************************************************************/
#include <algorithm>
#include "../extension_config.hpp"
using namespace libproxy;
#define W32REG_OFFSET_PAC (1 << 2)
#define W32REG_OFFSET_WPAD (1 << 3)
#define W32REG_BASEKEY "Software\\Microsoft\\Windows\\CurrentVersion\\Internet Settings"
#define W32REG_BUFFLEN 1024
static bool get_registry(const char *key, const char *name, char **sval, uint32_t *slen, uint32_t *ival) {
HKEY hkey;
LONG result;
DWORD type;
DWORD buflen = W32REG_BUFFLEN;
BYTE buffer[W32REG_BUFFLEN];
// Don't allow the caller to specify both sval and ival
if (sval && ival)
return false;
// Open the key
if (RegOpenKeyExA(HKEY_CURRENT_USER, key, 0, KEY_READ, &hkey) != ERROR_SUCCESS)
return false;
// Read the value
result = RegQueryValueExA(hkey, name, NULL, &type, buffer, &buflen);
// Close the key
RegCloseKey(hkey);
// Evaluate
if (result != ERROR_SUCCESS)
return false;
switch (type)
{
case REG_BINARY:
case REG_EXPAND_SZ:
case REG_SZ:
if (!sval) return false;
if (slen) *slen = buflen;
*sval = new char[buflen];
return memcpy(*sval, buffer, buflen) != NULL;
case REG_DWORD:
if (ival) return memcpy(ival, buffer, buflen < sizeof(uint32_t) ? buflen : sizeof(uint32_t)) != NULL;
}
return false;
}
static bool is_enabled(uint8_t type) {
char *data = NULL;
uint32_t dlen = 0;
bool result = false;
// Get the binary value DefaultConnectionSettings
if (!get_registry(W32REG_BASEKEY "\\Connections", "DefaultConnectionSettings", &data, &dlen, NULL))
return false;
// WPAD and PAC are contained in the 9th value
if (dlen >= 9)
result = (data[8] & type) == type; // Check to see if the bit is set
delete data;
return result;
}
static map<string, string> parse_manual(string data) {
// ProxyServer comes in two formats:
// 1.2.3.4:8080 or ftp=1.2.3.4:8080;https=1.2.3.4:8080...
map<string, string> rval;
// If we have the second format, do recursive parsing,
// then handle just the first entry
if (data.find(";") != string::npos) {
rval = parse_manual(data.substr(data.find(";")+1));
data = data.substr(0, data.find(";"));
}
// If we have the first format, just assign HTTP and we're done
if (data.find("=") == string::npos) {
rval["http"] = string("http://") + data;
return rval;
}
// Otherwise set the value for this single entry and return
string protocol = data.substr(0, data.find("="));
try { rval[protocol] = url(protocol + "://" + data.substr(data.find("=")+1)).to_string(); }
catch (parse_error&) {}
return rval;
}
class w32reg_config_extension : public config_extension {
public:
vector<url> get_config(const url &dst) {
char *tmp = NULL;
uint32_t enabled = 0;
vector<url> response;
// WPAD
if (is_enabled(W32REG_OFFSET_WPAD)) {
response.push_back(url("wpad://"));
return response;
}
// PAC
if (is_enabled(W32REG_OFFSET_PAC) &&
get_registry(W32REG_BASEKEY, "AutoConfigURL", &tmp, NULL, NULL) &&
url::is_valid(string("pac+") + tmp)) {
response.push_back(url(string("pac+") + tmp));
delete tmp;
return response;
}
// Manual proxy
// Check to see if we are enabled and get the value of ProxyServer
if (get_registry(W32REG_BASEKEY, "ProxyEnable", NULL, NULL, &enabled) && enabled &&
get_registry(W32REG_BASEKEY, "ProxyServer", &tmp, NULL, NULL)) {
map<string, string> manual = parse_manual(tmp);
delete tmp;
// First we look for an exact match
if (manual.find(dst.get_scheme()) != manual.end())
response.push_back(manual[dst.get_scheme()]);
// Next we look for http
else if (manual.find("http") != manual.end())
response.push_back(manual["http"]);
// Last we look for socks
else if (manual.find("socks") != manual.end())
response.push_back(manual["socks"]);
return response;
}
// Direct
response.push_back(url("direct://"));
return response;
}
string get_ignore(const url &dst) {
char *tmp;
if (get_registry(W32REG_BASEKEY, "ProxyOverride", &tmp, NULL, NULL)) {
string po = tmp;
delete tmp;
const char windowsDelimiter = ';';
const char libproxyDelimiter = ',';
replace(po.begin(), po.end(), windowsDelimiter, libproxyDelimiter );
if (po.length()>0)
return po;
}
return "";
}
};
MM_MODULE_INIT_EZ(w32reg_config_extension, true, NULL, NULL);
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