6 files changed, 378 insertions, 0 deletions
diff --git a/src/modules/CMakeLists.txt b/src/modules/CMakeLists.txt
index 1e8128b..1d036c9 100644
--- a/src/modules/CMakeLists.txt
+++ b/src/modules/CMakeLists.txt
@@ -40,6 +40,10 @@ if(MYSQL_FOUND)
 add_subdirectory(UserDBBackendMysql)
 endif(MYSQL_FOUND)
 
+if(KRB5_FOUND)
+add_subdirectory(UserConfigBackendKrb5)
+endif(KRB5_FOUND)
+
 SET(STATIC_MODULE_LOADERS "")
 SET(STATIC_MODULE_LIST "")
 
diff --git a/src/modules/UserConfigBackendKrb5/CMakeLists.txt b/src/modules/UserConfigBackendKrb5/CMakeLists.txt
new file mode 100644
index 0000000..1526af8
--- /dev/null
+++ b/src/modules/UserConfigBackendKrb5/CMakeLists.txt
@@ -0,0 +1,8 @@
+include_directories(${INCLUDES} ${KRB5_INCLUDE_DIRS})
+
+mad_module(UserConfigBackendKrb5
+  Module.cpp Module.h
+  UserConfigBackendKrb5.cpp UserConfigBackendKrb5.h
+)
+
+mad_module_libraries(UserConfigBackendKrb5 ${KRB5_LIBRARIES})
diff --git a/src/modules/UserConfigBackendKrb5/Module.cpp b/src/modules/UserConfigBackendKrb5/Module.cpp
new file mode 100644
index 0000000..ecfec56
--- /dev/null
+++ b/src/modules/UserConfigBackendKrb5/Module.cpp
@@ -0,0 +1,28 @@
+/*
+ * Module.cpp
+ *
+ * Copyright (C) 2009 Matthias Schiffer <matthias@gamezock.de>
+ *
+ * This program 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 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "Module.h"
+
+extern "C" {
+
+Mad::Common::Module* UserConfigBackendKrb5_create(Mad::Common::Application *application) {
+  return new Mad::Modules::UserConfigBackendKrb5::Module(application);
+}
+
+}
diff --git a/src/modules/UserConfigBackendKrb5/Module.h b/src/modules/UserConfigBackendKrb5/Module.h
new file mode 100644
index 0000000..b3d29a6
--- /dev/null
+++ b/src/modules/UserConfigBackendKrb5/Module.h
@@ -0,0 +1,52 @@
+/*
+ * Module.h
+ *
+ * Copyright (C) 2009 Matthias Schiffer <matthias@gamezock.de>
+ *
+ * This program 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 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef MAD_MODULES_USERCONFIGBACKENDKRB5_MODULE_H_
+#define MAD_MODULES_USERCONFIGBACKENDKRB5_MODULE_H_
+
+#include "UserConfigBackendKrb5.h"
+
+#include <Common/Module.h>
+#include <Common/UserManager.h>
+
+namespace Mad {
+namespace Modules {
+namespace UserConfigBackendKrb5 {
+
+class Module : public Common::Module {
+  private:
+    Common::Application *application;
+
+    boost::shared_ptr<UserConfigBackendKrb5> backend;
+
+  public:
+    Module(Common::Application *application0) : application(application0), backend(new UserConfigBackendKrb5(application)) {
+      application->getUserManager()->registerBackend(backend);
+    }
+
+    virtual ~Module() {
+      application->getUserManager()->unregisterBackend(backend);
+    }
+};
+
+}
+}
+}
+
+#endif /* MAD_MODULES_USERCONFIGBACKENDKRB5_MODULE_H_ */
diff --git a/src/modules/UserConfigBackendKrb5/UserConfigBackendKrb5.cpp b/src/modules/UserConfigBackendKrb5/UserConfigBackendKrb5.cpp
new file mode 100644
index 0000000..5a577ad
--- /dev/null
+++ b/src/modules/UserConfigBackendKrb5/UserConfigBackendKrb5.cpp
@@ -0,0 +1,189 @@
+/*
+ * UserConfigBackendKrb5.cpp
+ *
+ * Copyright (C) 2009 Matthias Schiffer <matthias@gamezock.de>
+ *
+ * This program 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 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "UserConfigBackendKrb5.h"
+#include <Core/ConfigEntry.h>
+
+#include <cstring>
+
+namespace Mad {
+namespace Modules {
+namespace UserConfigBackendKrb5 {
+
+bool UserConfigBackendKrb5::connect() {
+  if(principal.empty()) {
+    application->log(Core::LoggerBase::USER, Core::LoggerBase::ERROR, "UserConfigBackendKrb5: no principal given");
+    return false;
+  }
+
+  if(realm.empty()) {
+    application->log(Core::LoggerBase::USER, Core::LoggerBase::ERROR, "UserConfigBackendKrb5: no realm given and no default realm available");
+    return false;
+  }
+
+  if(handle) {
+    kadm5_destroy(handle);
+    handle = 0;
+  }
+
+  kadm5_config_params params;
+  params.realm = const_cast<char*>(realm.c_str());
+  params.mask = KADM5_CONFIG_REALM;
+
+  if(!server.empty()) {
+    params.admin_server = const_cast<char*>(server.c_str());
+    params.mask |= KADM5_CONFIG_ADMIN_SERVER;
+  }
+
+  std::string princ = principal;
+  if(princ.find('@') == std::string::npos)
+    princ += "@" + realm;
+
+  if(!password.empty() && keytab.empty()) {
+    krb5_error_code err = kadm5_init_with_password(const_cast<char*>(princ.c_str()), const_cast<char*>(password.c_str()),
+        const_cast<char*>(KADM5_ADMIN_SERVICE), &params, KADM5_STRUCT_VERSION, KADM5_API_VERSION_2, 0, &handle);
+
+    if(err) {
+      application->logf(Core::LoggerBase::USER, Core::LoggerBase::ERROR, "kadm5_init_with_password: %s", std::strerror(err));
+      return false;
+    }
+  }
+  else {
+    char *keytabName = 0;
+    if(!keytab.empty())
+      keytabName = const_cast<char*>(keytab.c_str());
+
+    krb5_error_code err = kadm5_init_with_skey(const_cast<char*>(princ.c_str()), keytabName,
+        const_cast<char*>(KADM5_ADMIN_SERVICE), &params, KADM5_STRUCT_VERSION, KADM5_API_VERSION_2, 0, &handle);
+
+    if(err) {
+      application->logf(Core::LoggerBase::USER, Core::LoggerBase::ERROR, "kadm5_init_with_skey: %s", std::strerror(err));
+      return false;
+    }
+  }
+
+  application->log(Core::LoggerBase::USER, Core::LoggerBase::VERBOSE, "Connected to kerberos admin server.");
+  return true;
+}
+
+bool UserConfigBackendKrb5::handleConfigEntry(const Core::ConfigEntry &entry, bool /*handled*/) {
+  if(!entry[0].getKey().matches("UserManager"))
+    return false;
+
+  if(entry[1].empty())
+    return true;
+
+  if(!entry[1].getKey().matches("Krb5"))
+    return false;
+
+  if(entry[2].getKey().matches("Realm")) {
+    if(entry[3].empty())
+      realm = entry[2][0];
+  }
+  else if(entry[2].getKey().matches("Principal")) {
+    if(entry[3].empty())
+      principal = entry[2][0];
+  }
+  else if(entry[2].getKey().matches("Server")) {
+    if(entry[3].empty())
+      server = entry[2][0];
+  }
+  else if(entry[2].getKey().matches("Password")) {
+    if(entry[3].empty())
+      password = entry[2][0];
+  }
+  else if(entry[2].getKey().matches("Keytab")) {
+    if(entry[3].empty())
+      keytab = entry[2][0];
+  }
+  else if(!entry[2].empty())
+    return false;
+
+  return true;
+}
+
+
+void UserConfigBackendKrb5::checkUserInfo(const Common::UserInfo &userInfo) throw(Core::Exception) {
+  if(std::strcspn(userInfo.getUsername().c_str(), "/@") != userInfo.getUsername().length())
+    throw Core::Exception(Core::Exception::INVALID_INPUT);
+}
+
+void UserConfigBackendKrb5::addUser(const Common::UserInfo &userInfo) throw(Core::Exception) {
+  std::string princStr = userInfo.getUsername() + "@" + realm;
+
+  kadm5_principal_ent_rec princ;
+
+  krb5_error_code err = krb5_parse_name(context, princStr.c_str(), &princ.principal);
+  if(err)
+    throw Core::Exception("krb5_parse_name", Core::Exception::INTERNAL_ERRNO, err);
+
+  princ.attributes = KRB5_KDB_DISALLOW_ALL_TIX;
+
+  char dummybuf[128];
+  for(int i = 0; i < 128; ++i)
+    dummybuf[i] = (i+1)%128;
+
+  err = kadm5_create_principal(handle, &princ, KADM5_PRINCIPAL|KADM5_ATTRIBUTES, dummybuf);
+  if(err) {
+    krb5_free_principal(context, princ.principal);
+    throw Core::Exception("kadm5_create_principal", Core::Exception::INTERNAL_ERRNO, err);
+  }
+
+  err = kadm5_randkey_principal(handle, princ.principal, 0, 0);
+  if(err) {
+    krb5_free_principal(context, princ.principal);
+    throw Core::Exception("kadm5_randkey_principal", Core::Exception::INTERNAL_ERRNO, err);
+  }
+
+  princ.attributes = 0;
+  err = kadm5_modify_principal(handle, &princ, KADM5_ATTRIBUTES);
+
+  krb5_free_principal(context, princ.principal);
+
+  if(err)
+    throw Core::Exception("kadm5_modify_principal", Core::Exception::INTERNAL_ERRNO, err);
+}
+
+void UserConfigBackendKrb5::updateUser(const Common::UserInfo &oldUserInfo, const Common::UserInfo &userInfo) throw(Core::Exception) {
+  if(oldUserInfo.getUsername() == userInfo.getUsername())
+    return;
+
+  deleteUser(oldUserInfo);
+  addUser(userInfo);
+}
+
+void UserConfigBackendKrb5::deleteUser(const Common::UserInfo &userInfo) throw(Core::Exception) {
+  std::string princStr = userInfo.getUsername() + "@" + realm;
+  krb5_principal princ;
+
+  krb5_error_code err = krb5_parse_name(context, princStr.c_str(), &princ);
+  if(err)
+    throw Core::Exception("krb5_parse_name", Core::Exception::INTERNAL_ERRNO, err);
+
+  /*err = */kadm5_delete_principal(handle, princ);
+
+  krb5_free_principal(context, princ);
+
+  //if(err)
+  //  throw Core::Exception("kadm5_delete_principal", Core::Exception::INTERNAL_ERRNO, err);
+}
+
+}
+}
+}
diff --git a/src/modules/UserConfigBackendKrb5/UserConfigBackendKrb5.h b/src/modules/UserConfigBackendKrb5/UserConfigBackendKrb5.h
new file mode 100644
index 0000000..afb7663
--- /dev/null
+++ b/src/modules/UserConfigBackendKrb5/UserConfigBackendKrb5.h
@@ -0,0 +1,97 @@
+/*
+ * UserConfigBackendKrb5.h
+ *
+ * Copyright (C) 2009 Matthias Schiffer <matthias@gamezock.de>
+ *
+ * This program 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 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef MAD_MODULES_USERCONFIGBACKENDKRB5_USERCONFIGBACKENDKRB5_H_
+#define MAD_MODULES_USERCONFIGBACKENDKRB5_USERCONFIGBACKENDKRB5_H_
+
+#include <Common/UserConfigBackend.h>
+#include <Common/Application.h>
+
+#include <Core/Configurable.h>
+#include <Core/ConfigManager.h>
+
+#define USE_KADM5_API_VERSION 2
+#include <kadm5/admin.h>
+
+namespace Mad {
+namespace Modules {
+namespace UserConfigBackendKrb5 {
+
+class UserConfigBackendKrb5 : public Common::UserConfigBackend, private Core::Configurable, private boost::noncopyable {
+  private:
+    Common::Application *application;
+
+    std::string realm, principal, server;
+    std::string password, keytab;
+
+    krb5_context context;
+    void *handle;
+
+    bool connect();
+
+  protected:
+    virtual bool handleConfigEntry(const Core::ConfigEntry &entry, bool handled);
+
+    virtual void configFinished() {
+      connect();
+    }
+
+    virtual void checkUserInfo(const Common::UserInfo &userInfo) throw(Core::Exception);
+
+    virtual void addUser(const Common::UserInfo &userInfo) throw(Core::Exception);
+    virtual void updateUser(const Common::UserInfo &oldUserInfo, const Common::UserInfo &userInfo) throw(Core::Exception);
+    virtual void deleteUser(const Common::UserInfo &userInfo) throw(Core::Exception);
+
+  public:
+    UserConfigBackendKrb5(Common::Application *application0) : application(application0), handle(0) {
+      krb5_error_code err = krb5_init_context(&context);
+      if(err) {
+        context = 0;
+        return;
+      }
+
+      char *defaultRealm;
+
+      krb5_get_default_realm(context, &defaultRealm);
+      if(defaultRealm) {
+        realm = defaultRealm;
+        free(defaultRealm);
+      }
+
+      application->getConfigManager()->registerConfigurable(this);
+    }
+
+    virtual ~UserConfigBackendKrb5() {
+      if(!context)
+        return;
+
+      application->getConfigManager()->unregisterConfigurable(this);
+
+      if(handle)
+        kadm5_destroy(handle);
+
+      krb5_free_context(context);
+    }
+};
+
+}
+}
+}
+
+#endif /* MAD_MODULES_USERCONFIGBACKENDKRB5_USERCONFIGBACKENDKRB5_H_ */