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-rw-r--r--src/modules/m_httpd_acl.cpp154
1 files changed, 137 insertions, 17 deletions
diff --git a/src/modules/m_httpd_acl.cpp b/src/modules/m_httpd_acl.cpp
index 903e83f26..36eab758b 100644
--- a/src/modules/m_httpd_acl.cpp
+++ b/src/modules/m_httpd_acl.cpp
@@ -23,13 +23,14 @@ class ACL : public Extensible
{
public:
std::string path;
+ std::string username;
std::string password;
std::string whitelist;
std::string blacklist;
- ACL(const std::string &set_path, const std::string &set_password,
+ ACL(const std::string &set_path, const std::string &set_username, const std::string &set_password,
const std::string &set_whitelist, const std::string &set_blacklist)
- : path(set_path), password(set_password), whitelist(set_whitelist),
+ : path(set_path), username(set_username), password(set_password), whitelist(set_whitelist),
blacklist(set_blacklist) { }
~ACL() { }
@@ -48,13 +49,14 @@ class ModuleHTTPAccessList : public Module
{
acl_list.clear();
ConfigReader c(ServerInstance);
- int n_items = c.Enumerate("httpacl");
+ int n_items = c.Enumerate("httpdacl");
for (int i = 0; i < n_items; ++i)
{
- std::string path = c.ReadValue("httpacl", "path", i);
- std::string types = c.ReadValue("httpacl", "types", i);
+ std::string path = c.ReadValue("httpdacl", "path", i);
+ std::string types = c.ReadValue("httpdacl", "types", i);
irc::commasepstream sep(types);
std::string type;
+ std::string username;
std::string password;
std::string whitelist;
std::string blacklist;
@@ -63,15 +65,16 @@ class ModuleHTTPAccessList : public Module
{
if (type == "password")
{
- password = c.ReadValue("httpacl", "password", i);
+ username = c.ReadValue("httpdacl", "username", i);
+ password = c.ReadValue("httpdacl", "password", i);
}
else if (type == "whitelist")
{
- whitelist = c.ReadValue("httpacl", "whitelist", i);
+ whitelist = c.ReadValue("httpdacl", "whitelist", i);
}
else if (type == "blacklist")
{
- blacklist = c.ReadValue("httpacl", "blacklist", i);
+ blacklist = c.ReadValue("httpdacl", "blacklist", i);
}
else
{
@@ -79,34 +82,95 @@ class ModuleHTTPAccessList : public Module
}
}
- acl_list.push_back(ACL(path, password, whitelist, blacklist));
+ ServerInstance->Logs->Log("m_httpd_acl", DEBUG, "Read ACL: path=%s pass=%s whitelist=%s blacklist=%s", path.c_str(),
+ password.c_str(), whitelist.c_str(), blacklist.c_str());
+
+ acl_list.push_back(ACL(path, username, password, whitelist, blacklist));
}
}
ModuleHTTPAccessList(InspIRCd* Me) : Module(Me)
{
ReadConfig();
- this->changed = true;
Implementation eventlist[] = { I_OnEvent, I_OnRequest };
ServerInstance->Modules->Attach(eventlist, this, 2);
}
- void BlockAccess(HTTPRequest* http, Event* event)
+ void BlockAccess(HTTPRequest* http, Event* event, int returnval, const std::string &extraheaderkey = "", const std::string &extraheaderval="")
{
std::stringstream data("Access to this resource is denied by an access control list. Please contact your IRC administrator.");
- HTTPDocument response(http->sock, &data, 403);
+ HTTPDocument response(http->sock, &data, returnval);
response.headers.SetHeader("X-Powered-By", "m_httpd_acl.so");
+ if (!extraheaderkey.empty())
+ response.headers.SetHeader(extraheaderkey, extraheaderval);
Request req((char*)&response, (Module*)this, event->GetSource());
req.Send();
}
+ bool IsBase64(unsigned char c)
+ {
+ return (isalnum(c) || (c == '+') || (c == '/'));
+ }
+
+ std::string Base64Decode(const std::string &base64)
+ {
+ const std::string base64_chars("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/");
+
+ int inputlen = base64.length();
+
+ if (inputlen == 0)
+ return "";
+
+ int i = 0, j = 0, input = 0;
+
+ unsigned char longbuf[4], shortbuf[3];
+ std::string ret;
+
+ while (inputlen-- && ( base64[input] != '=') && IsBase64(base64[input]))
+ {
+ longbuf[i++] = base64[input]; input++;
+ if (i ==4)
+ {
+ for (i = 0; i <4; i++)
+ longbuf[i] = base64_chars.find(longbuf[i]);
+
+ shortbuf[0] = (longbuf[0] << 2) + ((longbuf[1] & 0x30) >> 4);
+ shortbuf[1] = ((longbuf[1] & 0xf) << 4) + ((longbuf[2] & 0x3c) >> 2);
+ shortbuf[2] = ((longbuf[2] & 0x3) << 6) + longbuf[3];
+
+ for (i = 0; (i < 3); i++)
+ ret += shortbuf[i];
+
+ i = 0;
+ }
+ }
+
+ if (i)
+ {
+ for (j = i; j <4; j++)
+ longbuf[j] = 0;
+
+ for (j = 0; j <4; j++)
+ longbuf[j] = base64_chars.find(longbuf[j]);
+
+ shortbuf[0] = (longbuf[0] << 2) + ((longbuf[1] & 0x30) >> 4);
+ shortbuf[1] = ((longbuf[1] & 0xf) << 4) + ((longbuf[2] & 0x3c) >> 2);
+ shortbuf[2] = ((longbuf[2] & 0x3) << 6) + longbuf[3];
+
+ for (j = 0; (j < i - 1); j++)
+ ret += shortbuf[j];
+ }
+
+ return ret;
+ }
+
void OnEvent(Event* event)
{
std::stringstream data("");
- if (event->GetEventID() == "httpd_url")
+ if (event->GetEventID() == "httpd_acl")
{
- ServerInstance->Logs->Log("m_http_stats", DEBUG,"Handling httpd event");
+ ServerInstance->Logs->Log("m_http_stats", DEBUG,"Handling httpd acl event");
HTTPRequest* http = (HTTPRequest*)event->GetData();
for (std::vector<ACL>::const_iterator this_acl = acl_list.begin(); this_acl != acl_list.end(); ++this_acl)
@@ -123,7 +187,9 @@ class ModuleHTTPAccessList : public Module
{
if (match(http->GetIP(), entry))
{
- BlockAccess(http, event);
+ ServerInstance->Logs->Log("m_httpd_acl", DEBUG, "Denying access to blacklisted resource %s (matched by pattern %s) from ip %s (matched by entry %s)",
+ http->GetURI().c_str(), this_acl->path.c_str(), http->GetIP().c_str(), entry.c_str());
+ BlockAccess(http, event, 403);
return;
}
}
@@ -143,14 +209,68 @@ class ModuleHTTPAccessList : public Module
if (!allow_access)
{
- BlockAccess(http, event);
+ ServerInstance->Logs->Log("m_httpd_acl", DEBUG, "Denying access to whitelisted resource %s (matched by pattern %s) from ip %s (matched by entry %s)",
+ http->GetURI().c_str(), this_acl->path.c_str(), http->GetIP().c_str(), entry.c_str());
+ BlockAccess(http, event, 403);
return;
}
}
- if (!this_acl->password.empty())
+ if (!this_acl->password.empty() && !this_acl->username.empty())
{
/* Password auth, first look to see if we have a basic authentication header */
+ ServerInstance->Logs->Log("m_httpd_acl", DEBUG, "Checking HTTP auth password for resource %s (matched by pattern %s) from ip %s, against username %s",
+ http->GetURI().c_str(), this_acl->path.c_str(), http->GetIP().c_str(), this_acl->username.c_str());
+
+ if (http->headers->IsSet("Authorization"))
+ {
+ /* Password has been given, validate it */
+ std::string authorization = http->headers->GetHeader("Authorization");
+ irc::spacesepstream sep(authorization);
+ std::string authtype;
+ std::string base64;
+
+ sep.GetToken(authtype);
+ if (authtype == "Basic")
+ {
+ std::string user;
+ std::string pass;
+
+ sep.GetToken(base64);
+ std::string userpass = Base64Decode(base64);
+ ServerInstance->Logs->Log("m_httpd_acl", DEBUG, "HTTP authorization: %s (%s)", userpass.c_str(), base64.c_str());
+
+ irc::sepstream userpasspair(userpass, ':');
+ if (userpasspair.GetToken(user))
+ {
+ userpasspair.GetToken(pass);
+
+ /* Access granted if username and password are correct */
+ if (user == this_acl->username && pass == this_acl->password)
+ {
+ ServerInstance->Logs->Log("m_httpd_acl", DEBUG, "HTTP authorization: password and username match");
+ return;
+ }
+ else
+ /* Invalid password */
+ BlockAccess(http, event, 401, "WWW-Authenticate", "Basic realm=\"Restricted Object\"");
+ }
+ else
+ /* Malformed user:pass pair */
+ BlockAccess(http, event, 401, "WWW-Authenticate", "Basic realm=\"Restricted Object\"");
+ }
+ else
+ /* Unsupported authentication type */
+ BlockAccess(http, event, 401, "WWW-Authenticate", "Basic realm=\"Restricted Object\"");
+ }
+ else
+ {
+ /* No password given at all, access denied */
+ BlockAccess(http, event, 401, "WWW-Authenticate", "Basic realm=\"Restricted Object\"");
+ }
}
+
+ /* A path may only match one ACL (the first it finds in the config file) */
+ return;
}
}
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-18 23:46:49 +0000