403 lines
16 KiB
Text
403 lines
16 KiB
Text
#include "ikev2_vpn_protocol_mac.h"
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#include <core/networkUtilities.h>
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#include <SystemConfiguration/SCSchemaDefinitions.h>
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#include <SystemConfiguration/SCNetwork.h>
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#include <SystemConfiguration/SCNetworkConnection.h>
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#include <SystemConfiguration/SCNetworkConfiguration.h>
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#import <NetworkExtension/NetworkExtension.h>
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#import <Foundation/Foundation.h>
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#include <QWaitCondition>
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#include <openssl/bio.h>
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#include <openssl/pkcs12.h>
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#include <openssl/pem.h>
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#include <openssl/err.h>
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#include <sys/sysctl.h>
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#include <netinet/in.h>
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#include <net/if.h>
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#include <net/route.h>
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static NSString * const IKEv2ServiceName = @"AmneziaVPN IKEv2";
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static Ikev2Protocol* self = nullptr;
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Ikev2Protocol::Ikev2Protocol(const QJsonObject &configuration, QObject* parent) :
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VpnProtocol(configuration, parent)
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{
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qDebug() << "IpsecProtocol::IpsecProtocol()";
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m_routeGateway = NetworkUtilities::getGatewayAndIface();
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self = this;
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readIkev2Configuration(configuration);
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}
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Ikev2Protocol::~Ikev2Protocol()
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{
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qDebug() << "IpsecProtocol::~IpsecProtocol()";
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disconnect_vpn();
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QThread::msleep(1000);
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Ikev2Protocol::stop();
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}
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void Ikev2Protocol::stop()
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{
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setConnectionState(Vpn::ConnectionState::Disconnected);
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qDebug() << "IpsecProtocol::stop()";
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}
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void Ikev2Protocol::readIkev2Configuration(const QJsonObject &configuration)
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{
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qDebug() << "IpsecProtocol::readIkev2Configuration";
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m_config = configuration;
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auto ikev2_data = m_config.value(ProtocolProps::key_proto_config_data(Proto::Ikev2)).toObject();
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m_ikev2_config = QJsonDocument::fromJson(ikev2_data.value(config_key::config).toString().toUtf8()).object();
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}
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CFDataRef CreatePersistentRefForIdentity(SecIdentityRef identity)
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{
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CFTypeRef persistent_ref = NULL;
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const void *keys[] = { kSecReturnPersistentRef, kSecValueRef };
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const void *values[] = { kCFBooleanTrue, identity };
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CFDictionaryRef dict = CFDictionaryCreate(NULL, keys, values,
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sizeof(keys) / sizeof(*keys), NULL, NULL);
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if (SecItemCopyMatching(dict, &persistent_ref) != 0) {
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SecItemAdd(dict, &persistent_ref);
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}
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if (dict)
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CFRelease(dict);
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return (CFDataRef)persistent_ref;
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}
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NSData *searchKeychainCopyMatching(const char *certName)
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{
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NSMutableDictionary *dict = [[NSMutableDictionary alloc] init];
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[dict setObject:(__bridge id)kSecClassCertificate forKey:(__bridge id)kSecClass];
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[dict setObject:[NSString stringWithUTF8String:certName] forKey:(__bridge id)kSecAttrLabel];
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[dict setObject:(__bridge id)kSecMatchLimitOne forKey:(__bridge id)kSecMatchLimit];
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[dict setObject:@YES forKey:(__bridge id)kSecReturnPersistentRef];
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CFTypeRef result = NULL;
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SecItemCopyMatching((__bridge CFDictionaryRef)dict, &result);
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return (NSData *)result;
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}
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ErrorCode Ikev2Protocol::start()
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{
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qDebug() << "IpsecProtocol::start";
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static QMutex mutexLocal;
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mutexLocal.lock();
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setConnectionState(Vpn::ConnectionState::Disconnected);
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NEVPNManager *manager = [NEVPNManager sharedManager];
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[manager loadFromPreferencesWithCompletionHandler:^(NSError *err)
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{
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mutexLocal.lock();
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if (err)
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{
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qDebug() << "First load vpn preferences failed:" << QString::fromNSString(err.localizedDescription);
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setConnectionState(Vpn::ConnectionState::Disconnected);
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mutexLocal.unlock();
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}
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else
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{
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NSData *output = NULL;
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BIO *ibio, *obio = NULL;
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BUF_MEM *bptr;
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STACK_OF(X509) *certstack = sk_X509_new_null();
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BIO *p12 = BIO_new(BIO_s_mem());
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EVP_PKEY *pkey;
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X509 *cert;
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BIO_write(p12, QByteArray::fromBase64(m_ikev2_config[config_key::cert].toString().toUtf8()),
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QByteArray::fromBase64(m_ikev2_config[config_key::cert].toString().toUtf8()).size());
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PKCS12 *pkcs12 = d2i_PKCS12_bio(p12, NULL);
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PKCS12_parse(pkcs12, m_ikev2_config[config_key::password].toString().toStdString().c_str(), &pkey, &cert, &certstack);
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// We output everything in PEM
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obio = BIO_new(BIO_s_mem());
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// TODO: support protecting the private key with a PEM passphrase
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if (pkey)
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{
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PEM_write_bio_PrivateKey(obio, pkey, NULL, NULL, 0, NULL, NULL);
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}
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if (cert)
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{
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PEM_write_bio_X509(obio, cert);
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}
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if (certstack && sk_X509_num(certstack))
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{
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for (int i = 0; i < sk_X509_num(certstack); i++)
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PEM_write_bio_X509_AUX(obio, sk_X509_value(certstack, i));
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}
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BIO_get_mem_ptr(obio, &bptr);
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output = [NSData dataWithBytes: bptr->data length: bptr->length];
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NSData *PKCS12Data = [[NSData alloc] initWithBase64EncodedString:m_ikev2_config[config_key::cert].toString().toNSString() options:0];
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CFArrayRef items = CFArrayCreate(NULL, 0, 0, NULL);
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OSStatus ret = SecPKCS12Import(
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(__bridge CFDataRef)output,
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(__bridge CFDictionaryRef)@{(id)kSecImportExportPassphrase:@""},
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&items);
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if (ret != errSecSuccess) {
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qDebug() << "import err ret " << ret;
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}
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NSDictionary *firstItem = [(__bridge_transfer NSArray *)items firstObject];
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SecIdentityRef identity = (__bridge SecIdentityRef)(firstItem[(__bridge id)kSecImportItemIdentity]);
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NEVPNProtocolIKEv2 *protocol = [[NEVPNProtocolIKEv2 alloc] init];
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protocol.serverAddress = m_ikev2_config.value(amnezia::config_key::hostName).toString().toNSString();
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protocol.certificateType = NEVPNIKEv2CertificateTypeRSA;
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protocol.remoteIdentifier = m_ikev2_config.value(amnezia::config_key::hostName).toString().toNSString();
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protocol.authenticationMethod = NEVPNIKEAuthenticationMethodCertificate;
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protocol.identityReference = searchKeychainCopyMatching(m_ikev2_config.value(amnezia::config_key::userName).toString().toLocal8Bit().data());
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protocol.useExtendedAuthentication = NO;
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protocol.enablePFS = YES;
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protocol.IKESecurityAssociationParameters.encryptionAlgorithm = NEVPNIKEv2EncryptionAlgorithmAES256;
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protocol.IKESecurityAssociationParameters.diffieHellmanGroup = NEVPNIKEv2DiffieHellmanGroup19;
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protocol.IKESecurityAssociationParameters.integrityAlgorithm = NEVPNIKEv2IntegrityAlgorithmSHA256;
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protocol.IKESecurityAssociationParameters.lifetimeMinutes = 1440;
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protocol.childSecurityAssociationParameters.encryptionAlgorithm = NEVPNIKEv2EncryptionAlgorithmAES256;
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protocol.childSecurityAssociationParameters.diffieHellmanGroup = NEVPNIKEv2DiffieHellmanGroup19;
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protocol.childSecurityAssociationParameters.integrityAlgorithm = NEVPNIKEv2IntegrityAlgorithmSHA256;
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protocol.childSecurityAssociationParameters.lifetimeMinutes = 1440;
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[manager setEnabled:YES];
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[manager setProtocolConfiguration:(protocol)];
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[manager setOnDemandEnabled:NO];
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[manager setLocalizedDescription:@"Amnezia VPN"];
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#ifdef QT_DEBUG
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NSString *strProtocol = [NSString stringWithFormat:@"{Protocol: %@", protocol];
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qDebug() << QString::fromNSString(strProtocol);
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#endif
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// do config stuff
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[manager saveToPreferencesWithCompletionHandler:^(NSError *err)
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{
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if (err)
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{
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qDebug() << "First save vpn preferences failed:" << QString::fromNSString(err.localizedDescription);
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setConnectionState(Vpn::ConnectionState::Disconnected);
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mutexLocal.unlock();
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}
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else
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{
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// load and save preferences again, otherwise Mac bug (https://forums.developer.apple.com/thread/25928)
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[manager loadFromPreferencesWithCompletionHandler:^(NSError *err)
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{
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if (err)
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{
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qDebug() << "Second load vpn preferences failed:" << QString::fromNSString(err.localizedDescription);
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setConnectionState(Vpn::ConnectionState::Disconnected);
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mutexLocal.unlock();
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}
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else
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{
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[manager saveToPreferencesWithCompletionHandler:^(NSError *err)
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{
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if (err)
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{
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qDebug() << "Second Save vpn preferences failed:" << QString::fromNSString(err.localizedDescription);
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setConnectionState(Vpn::ConnectionState::Disconnected);
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mutexLocal.unlock();
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}
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else
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{
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notificationId_ = [[NSNotificationCenter defaultCenter] addObserverForName: (NSString *)NEVPNStatusDidChangeNotification object: manager.connection queue: nil usingBlock: ^ (NSNotification *notification)
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{
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this->handleNotification(notification);
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}];
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qDebug() << "NEVPNConnection current status:" << (int)manager.connection.status;
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NSError *startError;
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[manager.connection startVPNTunnelAndReturnError:&startError];
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if (startError)
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{
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qDebug() << "Error starting ikev2 connection:" << QString::fromNSString(startError.localizedDescription);
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[[NSNotificationCenter defaultCenter] removeObserver: (id)notificationId_ name: (NSString *)NEVPNStatusDidChangeNotification object: manager.connection];
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setConnectionState(Vpn::ConnectionState::Disconnected);
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}
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mutexLocal.unlock();
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}
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}];
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}
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}];
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}
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}];
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}
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}];
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mutexLocal.unlock();
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setConnectionState(Vpn::ConnectionState::Connected);
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return ErrorCode::NoError;
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}
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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bool Ikev2Protocol::create_new_vpn(const QString & vpn_name,
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const QString & serv_addr) {
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qDebug() << "Ikev2Protocol::create_new_vpn()";
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return true;
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}
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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bool Ikev2Protocol::delete_vpn_connection(const QString &vpn_name) {
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return false;
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}
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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bool Ikev2Protocol::connect_to_vpn(const QString & vpn_name) {
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return false;
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}
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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bool Ikev2Protocol::disconnect_vpn() {
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NEVPNManager *manager = [NEVPNManager sharedManager];
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// #713: If user had started connecting to IKev2 on Mac and quickly started after this connecting to Wireguard
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// then manager.connection.status doesn't have time to change to NEVPNStatusConnecting
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// and remains NEVPNStatusDisconnected as it was before connection tries.
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// Then we should check below isConnectingStateReachedAfterStartingConnection_ flag to be sure that connecting started.
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// Without this check we will start connecting to the Wireguard when IKEv2 connecting process hasn't finished yet.
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if (manager.connection.status == NEVPNStatusDisconnected && isConnectingStateReachedAfterStartingConnection_)
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{
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[[NSNotificationCenter defaultCenter] removeObserver: (id)notificationId_ name: (NSString *)NEVPNStatusDidChangeNotification object: manager.connection];
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setConnectionState(Vpn::ConnectionState::Disconnected);
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}
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else
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{
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[manager.connection stopVPNTunnel];
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}
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return true;
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}
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void Ikev2Protocol::closeWindscribeActiveConnection()
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{
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NEVPNManager *manager = [NEVPNManager sharedManager];
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if (manager)
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{
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[manager loadFromPreferencesWithCompletionHandler:^(NSError *err)
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{
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if (!err)
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{
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NEVPNConnection * connection = [manager connection];
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if (connection.status == NEVPNStatusConnected || connection.status == NEVPNStatusConnecting)
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{
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if ([manager.localizedDescription isEqualToString:@"Amnezia VPN"] == YES)
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{
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qDebug() << "Previous IKEv2 connection is active. Stop it.";
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[connection stopVPNTunnel];
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}
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}
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}
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}];
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}
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}
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void Ikev2Protocol::handleNotificationImpl(int status)
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{
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QMutexLocker locker(&mutex_);
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NEVPNManager *manager = [NEVPNManager sharedManager];
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if (status == NEVPNStatusInvalid)
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{
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qDebug() << "Connection status changed: NEVPNStatusInvalid";
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[[NSNotificationCenter defaultCenter] removeObserver: (id)notificationId_ name: (NSString *)NEVPNStatusDidChangeNotification object: manager.connection];
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setConnectionState(Vpn::ConnectionState::Disconnected);
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}
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else if (status == NEVPNStatusDisconnected)
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{
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qDebug() << "Connection status changed: NEVPNStatusDisconnected";
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IpcClient::Interface()->disableKillSwitch();
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setConnectionState(Vpn::ConnectionState::Disconnected);
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[[NSNotificationCenter defaultCenter] removeObserver: (id)notificationId_ name: (NSString *)NEVPNStatusDidChangeNotification object: manager.connection];
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}
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else if (status == NEVPNStatusConnecting)
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{
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isConnectingStateReachedAfterStartingConnection_ = true;
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setConnectionState(Vpn::ConnectionState::Connecting);
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qDebug() << "Connection status changed: NEVPNStatusConnecting";
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}
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else if (status == NEVPNStatusConnected)
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{
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qDebug() << "Connection status changed: NEVPNStatusConnected";
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QString ipsecAdapterName_ = NetworkUtilities::lastConnectedNetworkInterfaceName();
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m_vpnLocalAddress = NetworkUtilities::ipAddressByInterfaceName(ipsecAdapterName_);
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m_vpnGateway = m_vpnLocalAddress;
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QList<QHostAddress> dnsAddr;
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dnsAddr.push_back(QHostAddress(m_config.value(config_key::dns1).toString()));
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dnsAddr.push_back(QHostAddress(m_config.value(config_key::dns2).toString()));
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IpcClient::Interface()->updateResolvers(ipsecAdapterName_, dnsAddr);
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if (QVariant(m_config.value(config_key::killSwitchOption).toString()).toBool()) {
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qDebug() << "enable killswitch";
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IpcClient::Interface()->enableKillSwitch(m_config, 0);
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}
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if (m_config.value(amnezia::config_key::splitTunnelType).toInt() == 0) {
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IpcClient::Interface()->routeAddList(m_vpnGateway, QStringList() << "0.0.0.0/1");
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IpcClient::Interface()->routeAddList(m_vpnGateway, QStringList() << "128.0.0.0/1");
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IpcClient::Interface()->routeAddList(m_routeGateway, QStringList() << m_config.value(amnezia::config_key::hostName).toString());
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}
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setConnectionState(Vpn::ConnectionState::Connected);
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}
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else if (status == NEVPNStatusReasserting)
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{
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qDebug() << "Connection status changed: NEVPNStatusReasserting";
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setConnectionState(Vpn::ConnectionState::Connecting);
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}
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else if (status == NEVPNStatusDisconnecting)
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{
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qDebug() << "Connection status changed: NEVPNStatusDisconnecting";
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setConnectionState(Vpn::ConnectionState::Disconnecting);
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}
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}
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void Ikev2Protocol::handleNotification(void *notification)
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{
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QMutexLocker locker(&mutex_);
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NSNotification *nsNotification = (NSNotification *)notification;
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NEVPNConnection *connection = nsNotification.object;
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QMetaObject::invokeMethod(this, "handleNotificationImpl", Q_ARG(int, (int)connection.status));
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}
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