phosphor-ldap-conf: add application to configure LDAP

The application implements the xyz.openbmc_project.User.Ldap.Config
and xyz.openbmc_project.User.Ldap.Create D-Bus interfaces to create
LDAP config file(for example generate nslcd.conf)

Change-Id: Idc7cc643c4143f9bc51182019926e1dd6125da2f
Signed-off-by: Nagaraju Goruganti <ngorugan@in.ibm.com>

1 files changed, 234 insertions, 0 deletions

diff --git a/phosphor-ldap-config/ldap_configuration.cpp b/phosphor-ldap-config/ldap_configuration.cpp
new file mode 100644
index 0000000..06a4d5d
--- /dev/null
+++ b/phosphor-ldap-config/ldap_configuration.cpp
@@ -0,0 +1,234 @@
+#include <phosphor-logging/elog.hpp>
+#include <phosphor-logging/elog-errors.hpp>
+#include "ldap_configuration.hpp"
+#include "config.h"
+#include <fstream>
+#include <sstream>
+
+namespace phosphor
+{
+namespace ldap
+{
+constexpr auto nslcdService = "nslcd.service";
+
+Config::Config(sdbusplus::bus::bus& bus, const char* path, const char* filePath,
+               bool secureLDAP, std::string lDAPServerURI,
+               std::string lDAPBindDN, std::string lDAPBaseDN,
+               std::string lDAPBindDNpassword,
+               ldap_base::Config::SearchScope lDAPSearchScope,
+               ldap_base::Config::Type lDAPType, ConfigMgr& parent) :
+    ConfigIface(bus, path, true),
+    configFilePath(filePath), bus(bus), parent(parent)
+{
+    ConfigIface::secureLDAP(secureLDAP);
+    ConfigIface::lDAPServerURI(lDAPServerURI);
+    ConfigIface::lDAPBindDN(lDAPBindDN);
+    ConfigIface::lDAPBaseDN(lDAPBaseDN);
+    ConfigIface::lDAPBINDDNpassword(lDAPBindDNpassword);
+    ConfigIface::lDAPSearchScope(lDAPSearchScope);
+    ConfigIface::lDAPType(lDAPType);
+    writeConfig();
+    parent.restartService(nslcdService);
+    // Emit deferred signal.
+    this->emit_object_added();
+}
+
+void Config::writeConfig()
+{
+    std::fstream stream(configFilePath.c_str(), std::fstream::out);
+    std::stringstream confData;
+    confData << "uid root\n";
+    confData << "gid root\n\n";
+    confData << "ldap_version 3\n\n";
+    confData << "timelimit 30\n";
+    confData << "bind_timelimit 30\n";
+    confData << "pagesize 1000\n";
+    confData << "referrals off\n\n";
+    confData << "uri " << lDAPServerURI() << "\n\n";
+    confData << "base " << lDAPBaseDN() << "\n\n";
+    confData << "binddn " << lDAPBindDN() << "\n";
+    confData << "bindpw " << lDAPBINDDNpassword() << "\n\n";
+    switch (lDAPSearchScope())
+    {
+        case ldap_base::Config::SearchScope::sub:
+            confData << "scope sub\n\n";
+            break;
+        case ldap_base::Config::SearchScope::one:
+            confData << "scope one\n\n";
+            break;
+        case ldap_base::Config::SearchScope::base:
+            confData << "scope base\n\n";
+            break;
+    }
+    confData << "base passwd " << lDAPBaseDN() << "\n";
+    confData << "base shadow " << lDAPBaseDN() << "\n\n";
+    if (secureLDAP() == true)
+    {
+        confData << "ssl on\n";
+        confData << "tls_reqcert allow\n";
+        confData << "tls_cert /etc/nslcd/certs/cert.pem\n";
+    }
+    else
+    {
+        confData << "ssl off\n\n";
+    }
+    if (lDAPType() == ldap_base::Config::Type::ActiveDirectory)
+    {
+        confData << "filter passwd (&(objectClass=user)(objectClass=person)"
+                    "(!(objectClass=computer)))\n";
+        confData
+            << "filter group (|(objectclass=group)(objectclass=groupofnames) "
+               "(objectclass=groupofuniquenames))\n";
+        confData << "map passwd uid              sAMAccountName\n";
+        confData << "map passwd uidNumber        "
+                    "objectSid:S-1-5-21-3623811015-3361044348-30300820\n";
+        confData << "map passwd gidNumber        primaryGroupID\n";
+        confData << "map passwd homeDirectory    \"/home/$sAMAccountName\"\n";
+        confData << "map passwd gecos            displayName\n";
+        confData << "map passwd loginShell       \"/bin/bash\"\n";
+        confData << "map group gidNumber         primaryGroupID\n";
+        confData << "map group gidNumber         "
+                    "objectSid:S-1-5-21-3623811015-3361044348-30300820\n";
+        confData << "map group cn                sAMAccountName\n";
+    }
+    else if (lDAPType() == ldap_base::Config::Type::OpenLdap)
+    {
+        confData << "filter passwd (objectclass=*)\n";
+        confData << "map passwd uid cn\n";
+        confData << "map passwd gecos displayName\n";
+    }
+    stream << confData.str();
+    stream.flush();
+    stream.close();
+    return;
+}
+
+bool Config::secureLDAP(bool value)
+{
+    if (value == secureLDAP())
+    {
+        return value;
+    }
+
+    auto val = ConfigIface::secureLDAP(value);
+    writeConfig();
+    parent.restartService(nslcdService);
+
+    return val;
+}
+
+std::string Config::lDAPServerURI(std::string value)
+{
+    if (value == lDAPServerURI())
+    {
+        return value;
+    }
+
+    auto val = ConfigIface::lDAPServerURI(value);
+    writeConfig();
+    parent.restartService(nslcdService);
+
+    return val;
+}
+
+std::string Config::lDAPBindDN(std::string value)
+{
+    if (value == lDAPBindDN())
+    {
+        return value;
+    }
+
+    auto val = ConfigIface::lDAPBindDN(value);
+    writeConfig();
+    parent.restartService(nslcdService);
+
+    return val;
+}
+
+std::string Config::lDAPBaseDN(std::string value)
+{
+    if (value == lDAPBaseDN())
+    {
+        return value;
+    }
+
+    auto val = ConfigIface::lDAPBaseDN(value);
+    writeConfig();
+    parent.restartService(nslcdService);
+
+    return val;
+}
+
+std::string Config::lDAPBINDDNpassword(std::string value)
+{
+    if (value == lDAPBINDDNpassword())
+    {
+        return value;
+    }
+
+    auto val = ConfigIface::lDAPBINDDNpassword(value);
+    writeConfig();
+    parent.restartService(nslcdService);
+
+    return val;
+}
+
+ldap_base::Config::SearchScope
+    Config::lDAPSearchScope(ldap_base::Config::SearchScope value)
+{
+    if (value == lDAPSearchScope())
+    {
+        return value;
+    }
+
+    auto val = ConfigIface::lDAPSearchScope(value);
+    writeConfig();
+    parent.restartService(nslcdService);
+
+    return val;
+}
+
+ldap_base::Config::Type Config::lDAPType(ldap_base::Config::Type value)
+{
+    if (value == lDAPType())
+    {
+        return value;
+    }
+
+    auto val = ConfigIface::lDAPType(value);
+    writeConfig();
+    parent.restartService(nslcdService);
+
+    return val;
+}
+
+void ConfigMgr::restartService(const std::string& service)
+{
+    auto method = bus.new_method_call(SYSTEMD_BUSNAME, SYSTEMD_PATH,
+                                      SYSTEMD_INTERFACE, "RestartUnit");
+    method.append(service.c_str(), "replace");
+    bus.call_noreply(method);
+}
+
+std::string
+    ConfigMgr::createConfig(bool secureLDAP, std::string lDAPServerURI,
+                            std::string lDAPBindDN, std::string lDAPBaseDN,
+                            std::string lDAPBINDDNpassword,
+                            ldap_base::Create::SearchScope lDAPSearchScope,
+                            ldap_base::Create::Type lDAPType)
+{
+    // With current implementation we support only one LDAP server.
+    configPtr.reset(nullptr);
+
+    auto objPath = std::string(LDAP_CONFIG_DBUS_OBJ_PATH);
+    configPtr = std::make_unique<Config>(
+        bus, objPath.c_str(), LDAP_CONFIG_FILE, secureLDAP, lDAPServerURI,
+        lDAPBindDN, lDAPBaseDN, lDAPBINDDNpassword,
+        static_cast<ldap_base::Config::SearchScope>(lDAPSearchScope),
+        static_cast<ldap_base::Config::Type>(lDAPType), *this);
+
+    return objPath;
+}
+
+} // namespace ldap
+} // namespace phosphor