#include <ldap.h>
#ifdef _WIN32
-# pragma comment(lib, "ldap.lib")
-# pragma comment(lib, "lber.lib")
+# pragma comment(lib, "libldap.lib")
+# pragma comment(lib, "liblber.lib")
#endif
/* $ModDesc: Allow/Deny connections based upon answer from LDAP server */
/* $LinkerFlags: -lldap */
+struct RAIILDAPString
+{
+ char *str;
+
+ RAIILDAPString(char *Str)
+ : str(Str)
+ {
+ }
+
+ ~RAIILDAPString()
+ {
+ ldap_memfree(str);
+ }
+
+ operator char*()
+ {
+ return str;
+ }
+
+ operator std::string()
+ {
+ return str;
+ }
+};
+
+struct RAIILDAPMessage
+{
+ RAIILDAPMessage()
+ {
+ }
+
+ ~RAIILDAPMessage()
+ {
+ dealloc();
+ }
+
+ void dealloc()
+ {
+ ldap_msgfree(msg);
+ }
+
+ operator LDAPMessage*()
+ {
+ return msg;
+ }
+
+ LDAPMessage **operator &()
+ {
+ return &msg;
+ }
+
+ LDAPMessage *msg;
+};
+
class ModuleLDAPAuth : public Module
{
LocalIntExt ldapAuthed;
+ LocalStringExt ldapVhost;
std::string base;
std::string attribute;
std::string ldapserver;
std::string killreason;
std::string username;
std::string password;
+ std::string vhost;
std::vector<std::string> whitelistedcidrs;
std::vector<std::pair<std::string, std::string> > requiredattributes;
int searchscope;
LDAP *conn;
public:
- ModuleLDAPAuth() : ldapAuthed("ldapauth", this)
+ ModuleLDAPAuth()
+ : ldapAuthed("ldapauth", this)
+ , ldapVhost("ldapauth_vhost", this)
{
conn = NULL;
}
void init()
{
- Implementation eventlist[] = { I_OnCheckReady, I_OnRehash, I_OnUserRegister };
- ServerInstance->Modules->Attach(eventlist, this, 3);
+ ServerInstance->Modules->AddService(ldapAuthed);
+ ServerInstance->Modules->AddService(ldapVhost);
+ Implementation eventlist[] = { I_OnCheckReady, I_OnRehash,I_OnUserRegister, I_OnUserConnect };
+ ServerInstance->Modules->Attach(eventlist, this, sizeof(eventlist)/sizeof(Implementation));
OnRehash(NULL);
}
std::string scope = tag->getString("searchscope");
username = tag->getString("binddn");
password = tag->getString("bindauth");
+ vhost = tag->getString("host");
verbose = tag->getBool("verbose"); /* Set to true if failed connects should be reported to operators */
useusername = tag->getBool("userfield");
return true;
}
+ std::string SafeReplace(const std::string &text, std::map<std::string,
+ std::string> &replacements)
+ {
+ std::string result;
+ result.reserve(MAXBUF);
+
+ for (unsigned int i = 0; i < text.length(); ++i) {
+ char c = text[i];
+ if (c == '$') {
+ // find the first nonalpha
+ i++;
+ unsigned int start = i;
+
+ while (i < text.length() - 1 && isalpha(text[i + 1]))
+ ++i;
+
+ std::string key = text.substr(start, (i - start) + 1);
+ result.append(replacements[key]);
+ } else {
+ result.push_back(c);
+ }
+ }
+
+ return result;
+ }
+
+ virtual void OnUserConnect(LocalUser *user)
+ {
+ std::string* cc = ldapVhost.get(user);
+ if (cc)
+ {
+ user->ChangeDisplayedHost(cc->c_str());
+ ldapVhost.unset(user);
+ }
+ }
+
ModResult OnUserRegister(LocalUser* user)
{
if ((!allowpattern.empty()) && (InspIRCd::Match(user->nick,allowpattern)))
}
}
- LDAPMessage *msg, *entry;
- std::string what = (attribute + "=" + (useusername ? user->ident : user->nick));
- if ((res = ldap_search_ext_s(conn, base.c_str(), searchscope, what.c_str(), NULL, 0, NULL, NULL, NULL, 0, &msg)) != LDAP_SUCCESS)
+ RAIILDAPMessage msg;
+ std::string what;
+ std::string::size_type pos = user->password.find(':');
+ // If a username is provided in PASS, use it, othewrise user their nick or ident
+ if (pos != std::string::npos)
{
- // Do a second search, based on password, if it contains a :
- // That is, PASS <user>:<password> will work.
- size_t pos = user->password.find(":");
- if (pos != std::string::npos)
- {
- std::string cutpassword = user->password.substr(0, pos);
- res = ldap_search_ext_s(conn, base.c_str(), searchscope, cutpassword.c_str(), NULL, 0, NULL, NULL, NULL, 0, &msg);
-
- if (res == LDAP_SUCCESS)
- {
- // Trim the user: prefix, leaving just 'pass' for later password check
- user->password = user->password.substr(pos + 1);
- }
- }
+ what = (attribute + "=" + user->password.substr(0, pos));
- // It may have found based on user:pass check above.
- if (res != LDAP_SUCCESS)
- {
- if (verbose)
- ServerInstance->SNO->WriteToSnoMask('c', "Forbidden connection from %s (LDAP search failed: %s)", user->GetFullRealHost().c_str(), ldap_err2string(res));
- return false;
- }
+ // Trim the user: prefix, leaving just 'pass' for later password check
+ user->password = user->password.substr(pos + 1);
+ }
+ else
+ {
+ what = (attribute + "=" + (useusername ? user->ident : user->nick));
+ }
+ if ((res = ldap_search_ext_s(conn, base.c_str(), searchscope, what.c_str(), NULL, 0, NULL, NULL, NULL, 0, &msg)) != LDAP_SUCCESS)
+ {
+ if (verbose)
+ ServerInstance->SNO->WriteToSnoMask('c', "Forbidden connection from %s (LDAP search failed: %s)", user->GetFullRealHost().c_str(), ldap_err2string(res));
+ return false;
}
if (ldap_count_entries(conn, msg) > 1)
{
if (verbose)
ServerInstance->SNO->WriteToSnoMask('c', "Forbidden connection from %s (LDAP search returned more than one result: %s)", user->GetFullRealHost().c_str(), ldap_err2string(res));
- ldap_msgfree(msg);
return false;
}
+
+ LDAPMessage *entry;
if ((entry = ldap_first_entry(conn, msg)) == NULL)
{
if (verbose)
ServerInstance->SNO->WriteToSnoMask('c', "Forbidden connection from %s (LDAP search returned no results: %s)", user->GetFullRealHost().c_str(), ldap_err2string(res));
- ldap_msgfree(msg);
return false;
}
cred.bv_val = (char*)user->password.data();
cred.bv_len = user->password.length();
- if ((res = ldap_sasl_bind_s(conn, ldap_get_dn(conn, entry), LDAP_SASL_SIMPLE, &cred, NULL, NULL, NULL)) != LDAP_SUCCESS)
+ RAIILDAPString DN(ldap_get_dn(conn, entry));
+ if ((res = ldap_sasl_bind_s(conn, DN, LDAP_SASL_SIMPLE, &cred, NULL, NULL, NULL)) != LDAP_SUCCESS)
{
if (verbose)
ServerInstance->SNO->WriteToSnoMask('c', "Forbidden connection from %s (%s)", user->GetFullRealHost().c_str(), ldap_err2string(res));
- ldap_msgfree(msg);
return false;
}
- if (requiredattributes.empty())
+ if (!requiredattributes.empty())
{
- ldap_msgfree(msg);
- ldapAuthed.set(user,1);
- return true;
- }
+ bool authed = false;
- bool authed = false;
+ for (std::vector<std::pair<std::string, std::string> >::const_iterator it = requiredattributes.begin(); it != requiredattributes.end(); ++it)
+ {
+ const std::string &attr = it->first;
+ const std::string &val = it->second;
- for (std::vector<std::pair<std::string, std::string> >::const_iterator it = requiredattributes.begin(); it != requiredattributes.end(); ++it)
- {
- const std::string &attr = it->first;
- const std::string &val = it->second;
+ struct berval attr_value;
+ attr_value.bv_val = const_cast<char*>(val.c_str());
+ attr_value.bv_len = val.length();
- struct berval attr_value;
- attr_value.bv_val = const_cast<char*>(val.c_str());
- attr_value.bv_len = val.length();
+ ServerInstance->Logs->Log("m_ldapauth", DEBUG, "LDAP compare: %s=%s", attr.c_str(), val.c_str());
- ServerInstance->Logs->Log("m_ldapauth", DEBUG, "LDAP compare: %s=%s", attr.c_str(), val.c_str());
+ authed = (ldap_compare_ext_s(conn, DN, attr.c_str(), &attr_value, NULL, NULL) == LDAP_COMPARE_TRUE);
- authed = (ldap_compare_ext_s(conn, ldap_get_dn(conn, entry), attr.c_str(), &attr_value, NULL, NULL) == LDAP_COMPARE_TRUE);
+ if (authed)
+ break;
+ }
- if (authed)
- break;
+ if (!authed)
+ {
+ if (verbose)
+ ServerInstance->SNO->WriteToSnoMask('c', "Forbidden connection from %s (Lacks required LDAP attributes)", user->GetFullRealHost().c_str());
+ return false;
+ }
}
- ldap_msgfree(msg);
+ if (!vhost.empty())
+ {
+ irc::commasepstream stream(DN);
- if (!authed)
- return false;
+ // mashed map of key:value parts of the DN
+ std::map<std::string, std::string> dnParts;
+
+ std::string dnPart;
+ while (stream.GetToken(dnPart))
+ {
+ pos = dnPart.find('=');
+ if (pos == std::string::npos) // malformed
+ continue;
+
+ std::string key = dnPart.substr(0, pos);
+ std::string value = dnPart.substr(pos + 1, dnPart.length() - pos + 1); // +1s to skip the = itself
+ dnParts[key] = value;
+ }
+
+ // change host according to config key
+ ldapVhost.set(user, SafeReplace(vhost, dnParts));
+ }
ldapAuthed.set(user,1);
return true;
projects / user / henk / code / inspircd.git / blobdiff