1 /* +------------------------------------+
2 * | Inspire Internet Relay Chat Daemon |
3 * +------------------------------------+
5 * InspIRCd: (C) 2002-2008 InspIRCd Development Team
6 * See: http://www.inspircd.org/wiki/index.php/Credits
8 * This program is free but copyrighted software; see
9 * the file COPYING for details.
11 * ---------------------------------------------------
18 /* $ModDesc: Provides access control lists (passwording of resources, ip restrictions etc) to m_httpd.so dependent modules */
19 /* $ModDep: httpd.h */
21 class HTTPACL : public Extensible
27 std::string whitelist;
28 std::string blacklist;
30 HTTPACL(const std::string &set_path, const std::string &set_username, const std::string &set_password,
31 const std::string &set_whitelist, const std::string &set_blacklist)
32 : path(set_path), username(set_username), password(set_password), whitelist(set_whitelist),
33 blacklist(set_blacklist) { }
38 class ModuleHTTPAccessList : public Module
41 std::string stylesheet;
43 std::vector<HTTPACL> acl_list;
50 ConfigReader c(ServerInstance);
51 int n_items = c.Enumerate("httpdacl");
52 for (int i = 0; i < n_items; ++i)
54 std::string path = c.ReadValue("httpdacl", "path", i);
55 std::string types = c.ReadValue("httpdacl", "types", i);
56 irc::commasepstream sep(types);
60 std::string whitelist;
61 std::string blacklist;
63 while (sep.GetToken(type))
65 if (type == "password")
67 username = c.ReadValue("httpdacl", "username", i);
68 password = c.ReadValue("httpdacl", "password", i);
70 else if (type == "whitelist")
72 whitelist = c.ReadValue("httpdacl", "whitelist", i);
74 else if (type == "blacklist")
76 blacklist = c.ReadValue("httpdacl", "blacklist", i);
80 throw ModuleException("Invalid HTTP ACL type '" + type + "'");
84 ServerInstance->Logs->Log("m_httpd_acl", DEBUG, "Read ACL: path=%s pass=%s whitelist=%s blacklist=%s", path.c_str(),
85 password.c_str(), whitelist.c_str(), blacklist.c_str());
87 acl_list.push_back(HTTPACL(path, username, password, whitelist, blacklist));
91 ModuleHTTPAccessList(InspIRCd* Me) : Module(Me)
94 Implementation eventlist[] = { I_OnEvent, I_OnRequest };
95 ServerInstance->Modules->Attach(eventlist, this, 2);
98 void BlockAccess(HTTPRequest* http, Event* event, int returnval, const std::string &extraheaderkey = "", const std::string &extraheaderval="")
100 ServerInstance->Logs->Log("m_httpd_acl", DEBUG, "BlockAccess (%d)", returnval);
102 std::stringstream data("Access to this resource is denied by an access control list. Please contact your IRC administrator.");
103 HTTPDocument response(http->sock, &data, returnval);
104 response.headers.SetHeader("X-Powered-By", "m_httpd_acl.so");
105 if (!extraheaderkey.empty())
106 response.headers.SetHeader(extraheaderkey, extraheaderval);
107 Request req((char*)&response, (Module*)this, event->GetSource());
111 bool IsBase64(unsigned char c)
113 return (isalnum(c) || (c == '+') || (c == '/'));
116 std::string Base64Decode(const std::string &base64)
118 const std::string base64_chars("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/");
119 int inputlen = base64.length();
120 int i = 0, j = 0, input = 0;
121 unsigned char longbuf[4], shortbuf[3];
127 while (inputlen-- && (base64[input] != '=') && IsBase64(base64[input]))
129 longbuf[i++] = base64[input];
133 for (i = 0; i < 4; ++i)
134 longbuf[i] = base64_chars.find(longbuf[i]);
136 shortbuf[0] = (longbuf[0] << 2) + ((longbuf[1] & 0x30) >> 4);
137 shortbuf[1] = ((longbuf[1] & 0xf) << 4) + ((longbuf[2] & 0x3c) >> 2);
138 shortbuf[2] = ((longbuf[2] & 0x3) << 6) + longbuf[3];
140 for (i = 0; i < 3; ++i)
141 retval += shortbuf[i];
149 for (j = i; j < 4; ++j)
152 for (j = 0; j < 4; ++j)
153 longbuf[j] = base64_chars.find(longbuf[j]);
155 shortbuf[0] = (longbuf[0] << 2) + ((longbuf[1] & 0x30) >> 4);
156 shortbuf[1] = ((longbuf[1] & 0xf) << 4) + ((longbuf[2] & 0x3c) >> 2);
157 shortbuf[2] = ((longbuf[2] & 0x3) << 6) + longbuf[3];
159 for (j = 0; j < i - 1; ++j)
160 retval += shortbuf[j];
166 void OnEvent(Event* event)
168 if (event->GetEventID() == "httpd_acl")
170 ServerInstance->Logs->Log("m_http_stats", DEBUG,"Handling httpd acl event");
171 HTTPRequest* http = (HTTPRequest*)event->GetData();
173 for (std::vector<HTTPACL>::const_iterator this_acl = acl_list.begin(); this_acl != acl_list.end(); ++this_acl)
175 if (InspIRCd::Match(http->GetURI(), this_acl->path))
177 if (!this_acl->blacklist.empty())
180 irc::commasepstream sep(this_acl->blacklist);
183 while (sep.GetToken(entry))
185 if (InspIRCd::Match(http->GetIP(), entry))
187 ServerInstance->Logs->Log("m_httpd_acl", DEBUG, "Denying access to blacklisted resource %s (matched by pattern %s) from ip %s (matched by entry %s)",
188 http->GetURI().c_str(), this_acl->path.c_str(), http->GetIP().c_str(), entry.c_str());
189 BlockAccess(http, event, 403);
194 if (!this_acl->whitelist.empty())
197 irc::commasepstream sep(this_acl->whitelist);
199 bool allow_access = false;
201 while (sep.GetToken(entry))
203 if (InspIRCd::Match(http->GetIP(), entry))
209 ServerInstance->Logs->Log("m_httpd_acl", DEBUG, "Denying access to whitelisted resource %s (matched by pattern %s) from ip %s (Not in whitelist)",
210 http->GetURI().c_str(), this_acl->path.c_str(), http->GetIP().c_str());
211 BlockAccess(http, event, 403);
215 if (!this_acl->password.empty() && !this_acl->username.empty())
217 /* Password auth, first look to see if we have a basic authentication header */
218 ServerInstance->Logs->Log("m_httpd_acl", DEBUG, "Checking HTTP auth password for resource %s (matched by pattern %s) from ip %s, against username %s",
219 http->GetURI().c_str(), this_acl->path.c_str(), http->GetIP().c_str(), this_acl->username.c_str());
221 if (http->headers->IsSet("Authorization"))
223 /* Password has been given, validate it */
224 std::string authorization = http->headers->GetHeader("Authorization");
225 irc::spacesepstream sep(authorization);
226 std::string authtype;
229 sep.GetToken(authtype);
230 if (authtype == "Basic")
235 sep.GetToken(base64);
236 std::string userpass = Base64Decode(base64);
237 ServerInstance->Logs->Log("m_httpd_acl", DEBUG, "HTTP authorization: %s (%s)", userpass.c_str(), base64.c_str());
239 irc::sepstream userpasspair(userpass, ':');
240 if (userpasspair.GetToken(user))
242 userpasspair.GetToken(pass);
244 /* Access granted if username and password are correct */
245 if (user == this_acl->username && pass == this_acl->password)
247 ServerInstance->Logs->Log("m_httpd_acl", DEBUG, "HTTP authorization: password and username match");
251 /* Invalid password */
252 BlockAccess(http, event, 401, "WWW-Authenticate", "Basic realm=\"Restricted Object\"");
255 /* Malformed user:pass pair */
256 BlockAccess(http, event, 401, "WWW-Authenticate", "Basic realm=\"Restricted Object\"");
259 /* Unsupported authentication type */
260 BlockAccess(http, event, 401, "WWW-Authenticate", "Basic realm=\"Restricted Object\"");
264 /* No password given at all, access denied */
265 BlockAccess(http, event, 401, "WWW-Authenticate", "Basic realm=\"Restricted Object\"");
269 /* A path may only match one ACL (the first it finds in the config file) */
276 const char* OnRequest(Request* request)
281 virtual ~ModuleHTTPAccessList()
285 virtual Version GetVersion()
287 return Version("$Id$", VF_VENDOR, API_VERSION);
291 MODULE_INIT(ModuleHTTPAccessList)