14 files changed, 839 insertions, 35 deletions
diff --git a/Swiften/Base/Algorithm.h b/Swiften/Base/Algorithm.h
index 108dbe3..ee761b7 100644
--- a/Swiften/Base/Algorithm.h
+++ b/Swiften/Base/Algorithm.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2011-2014 Isode Limited.
+ * Copyright (c) 2011-2018 Isode Limited.
  * All rights reserved.
  * See the COPYING file for more information.
  */
@@ -160,4 +160,28 @@ namespace Swift {
 
         return lhs.size() == rhs.size() && std::equal(lhs.begin(), lhs.end(), rhs.begin(), pred);
     }
+
+    /**
+     * Ranges
+     */
+    template <typename T>
+    class range_t {
+        public:
+            range_t(T b, T e) : b_(b), e_(e) {}
+
+            T begin() {
+                return b_;
+            }
+            T end() {
+                return e_;
+            }
+        private:
+            T b_;
+            T e_;
+    };
+
+    template <typename T>
+    range_t<T> range(T b, T e) {
+        return range_t<T>(b, e);
+    }
 }
diff --git a/Swiften/SConscript b/Swiften/SConscript
index d028a0c..18458ee 100644
--- a/Swiften/SConscript
+++ b/Swiften/SConscript
@@ -575,6 +575,10 @@ if env["SCONS_STAGE"] == "build" :
             File("Whiteboard/UnitTest/WhiteboardServerTest.cpp"),
             File("Whiteboard/UnitTest/WhiteboardClientTest.cpp"),
         ])
+    if env.get("HAVE_OPENSSL", 0) :
+        env.Append(UNITTEST_SOURCES = [
+            File("TLS/UnitTest/ClientServerTest.cpp"),
+        ])
 
     # Generate the Swiften header
     def relpath(path, start) :
diff --git a/Swiften/TLS/OpenSSL/OpenSSLContext.cpp b/Swiften/TLS/OpenSSL/OpenSSLContext.cpp
index 6f15edf..f90b4a8 100644
--- a/Swiften/TLS/OpenSSL/OpenSSLContext.cpp
+++ b/Swiften/TLS/OpenSSL/OpenSSLContext.cpp
@@ -21,6 +21,8 @@
 #include <Security/Security.h>
 #endif
 
+#include <Swiften/Base/Log.h>
+#include <Swiften/Base/Algorithm.h>
 #include <Swiften/TLS/OpenSSL/OpenSSLContext.h>
 #include <Swiften/TLS/OpenSSL/OpenSSLCertificate.h>
 #include <Swiften/TLS/CertificateWithKey.h>
@@ -61,11 +63,33 @@ namespace {
 
             OpenSSLInitializerFinalizer(const OpenSSLInitializerFinalizer &) = delete;
     };
-}
 
-OpenSSLContext::OpenSSLContext() : state_(State::Start) {
+    std::unique_ptr<SSL_CTX> createSSL_CTX(OpenSSLContext::Mode mode) {
+        std::unique_ptr<SSL_CTX> sslCtx;
+        switch (mode) {
+            case OpenSSLContext::Mode::Client:
+                sslCtx = std::unique_ptr<SSL_CTX>(SSL_CTX_new(SSLv23_client_method()));
+                break;
+            case OpenSSLContext::Mode::Server:
+                sslCtx = std::unique_ptr<SSL_CTX>(SSL_CTX_new(SSLv23_server_method()));
+                break;
+        }
+        return sslCtx;
+    }
+
+    std::string openSSLInternalErrorToString() {
+        auto bio = std::shared_ptr<BIO>(BIO_new(BIO_s_mem()), BIO_free);
+        ERR_print_errors(bio.get());
+        std::string errorString;
+        errorString.resize(BIO_pending(bio.get()));
+        BIO_read(bio.get(), (void*)errorString.data(), errorString.size());
+        return errorString;
+    }
+ }
+
+OpenSSLContext::OpenSSLContext(Mode mode) : mode_(mode), state_(State::Start) {
     ensureLibraryInitialized();
-    context_ = std::unique_ptr<SSL_CTX>(SSL_CTX_new(SSLv23_client_method()));
+    context_ = createSSL_CTX(mode_);
     SSL_CTX_set_options(context_.get(), SSL_OP_NO_SSLv2 | SSL_OP_NO_SSLv3);
 
     // TODO: implement CRL checking
@@ -129,7 +153,30 @@ void OpenSSLContext::ensureLibraryInitialized() {
     static OpenSSLInitializerFinalizer openSSLInit;
 }
 
+void OpenSSLContext::initAndSetBIOs() {
+    // Ownership of BIOs is transferred
+    readBIO_ = BIO_new(BIO_s_mem());
+    writeBIO_ = BIO_new(BIO_s_mem());
+    SSL_set_bio(handle_.get(), readBIO_, writeBIO_);
+}
+
+void OpenSSLContext::accept() {
+    assert(mode_ == Mode::Server);
+    handle_ = std::unique_ptr<SSL>(SSL_new(context_.get()));
+    if (!handle_) {
+        state_ = State::Error;
+        onError(std::make_shared<TLSError>());
+        return;
+    }
+
+    initAndSetBIOs();
+
+    state_ = State::Accepting;
+    doAccept();
+}
+
 void OpenSSLContext::connect() {
+    assert(mode_ == Mode::Client);
     handle_ = std::unique_ptr<SSL>(SSL_new(context_.get()));
     if (!handle_) {
         state_ = State::Error;
@@ -137,15 +184,40 @@ void OpenSSLContext::connect() {
         return;
     }
 
-    // Ownership of BIOs is transferred
-    readBIO_ = BIO_new(BIO_s_mem());
-    writeBIO_ = BIO_new(BIO_s_mem());
-    SSL_set_bio(handle_.get(), readBIO_, writeBIO_);
+    // Ownership of BIOs is transferred to the SSL_CTX instance in handle_.
+    initAndSetBIOs();
 
     state_ = State::Connecting;
     doConnect();
 }
 
+void OpenSSLContext::doAccept() {
+    auto acceptResult = SSL_accept(handle_.get());
+    auto error = SSL_get_error(handle_.get(), acceptResult);
+    switch (error) {
+        case SSL_ERROR_NONE: {
+            state_ = State::Connected;
+            //std::cout << x->name << std::endl;
+            //const char* comp = SSL_get_current_compression(handle_.get());
+            //std::cout << "Compression: " << SSL_COMP_get_name(comp) << std::endl;
+            onConnected();
+            // The following call is important so the client knowns the handshake is finished.
+            sendPendingDataToNetwork();
+            break;
+        }
+        case SSL_ERROR_WANT_READ:
+            sendPendingDataToNetwork();
+            break;
+        case SSL_ERROR_WANT_WRITE:
+            sendPendingDataToNetwork();
+            break;
+        default:
+            SWIFT_LOG(warning) << openSSLInternalErrorToString() << std::endl;
+            state_ = State::Error;
+            onError(std::make_shared<TLSError>());
+    }
+}
+
 void OpenSSLContext::doConnect() {
     int connectResult = SSL_connect(handle_.get());
     int error = SSL_get_error(handle_.get(), connectResult);
@@ -162,6 +234,7 @@ void OpenSSLContext::doConnect() {
             sendPendingDataToNetwork();
             break;
         default:
+            SWIFT_LOG(warning) << openSSLInternalErrorToString() << std::endl;
             state_ = State::Error;
             onError(std::make_shared<TLSError>());
     }
@@ -180,6 +253,9 @@ void OpenSSLContext::sendPendingDataToNetwork() {
 void OpenSSLContext::handleDataFromNetwork(const SafeByteArray& data) {
     BIO_write(readBIO_, vecptr(data), data.size());
     switch (state_) {
+        case State::Accepting:
+            doAccept();
+            break;
         case State::Connecting:
             doConnect();
             break;
@@ -217,6 +293,98 @@ void OpenSSLContext::sendPendingDataToApplication() {
     }
 }
 
+bool OpenSSLContext::setCertificateChain(const std::vector<Certificate::ref>& certificateChain) {
+    if (certificateChain.size() == 0) {
+        SWIFT_LOG(warning) << "Trying to load empty certificate chain." << std::endl;
+        return false;
+    }
+
+    // load endpoint certificate
+    auto openSSLCert = std::dynamic_pointer_cast<OpenSSLCertificate>(certificateChain[0]);
+    if (!openSSLCert) {
+        return false;
+    }
+
+    if (SSL_CTX_use_certificate(context_.get(), openSSLCert->getInternalX509().get()) != 1) {
+        return false;
+    }
+
+    if (certificateChain.size() > 1) {
+        for (auto certificate : range(certificateChain.begin() + 1, certificateChain.end())) {
+            auto openSSLCert = std::dynamic_pointer_cast<OpenSSLCertificate>(certificate);
+            if (!openSSLCert) {
+                return false;
+            }
+            if (SSL_CTX_add_extra_chain_cert(context_.get(), openSSLCert->getInternalX509().get()) != 1) {
+                SWIFT_LOG(warning) << "Trying to load empty certificate chain." << std::endl;
+                return false;
+            }
+        }
+    }
+
+    if (handle_) {
+        // This workaround is needed as OpenSSL has a shortcut to not do anything
+        // if you set the SSL_CTX to the existing SSL_CTX and not reloading the
+        // certificates from the SSL_CTX.
+        auto dummyContext = createSSL_CTX(mode_);
+        SSL_set_SSL_CTX(handle_.get(), dummyContext.get());
+        SSL_set_SSL_CTX(handle_.get(), context_.get());
+    }
+
+    return true;
+}
+
+int empty_or_preset_password_cb(char* buf, int max_len, int flag, void* password);
+
+int empty_or_preset_password_cb(char* buf, int max_len, int /* flag */, void* password) {
+    char* charPassword = (char*)password;
+    if (charPassword == nullptr) {
+        return 0;
+    }
+    int len = strlen(charPassword);
+    if(len > max_len) {
+        return 0;
+    }
+    memcpy(buf, charPassword, len);
+    return len;
+}
+
+bool OpenSSLContext::setPrivateKey(const PrivateKey::ref& privateKey) {
+    if (privateKey->getData().size() > std::numeric_limits<int>::max()) {
+        return false;
+    }
+
+    auto bio = std::shared_ptr<BIO>(BIO_new(BIO_s_mem()), BIO_free);
+    BIO_write(bio.get(), vecptr(privateKey->getData()), int(privateKey->getData().size()));
+
+    SafeByteArray safePassword;
+    void* password = nullptr;
+    if (privateKey->getPassword()) {
+        safePassword = privateKey->getPassword().get();
+        safePassword.push_back(0);
+        password = safePassword.data();
+    }
+    auto resultKey = PEM_read_bio_PrivateKey(bio.get(), nullptr, empty_or_preset_password_cb, password);
+    if (resultKey) {
+        if (handle_) {
+            auto result = SSL_use_PrivateKey(handle_.get(), resultKey);;
+            if (result != 1) {
+                return false;
+            }
+        }
+        else {
+            auto result = SSL_CTX_use_PrivateKey(context_.get(), resultKey);
+            if (result != 1) {
+                return false;
+            }
+        }
+    }
+    else {
+        return false;
+    }
+    return true;
+}
+
 bool OpenSSLContext::setClientCertificate(CertificateWithKey::ref certificate) {
     std::shared_ptr<PKCS12Certificate> pkcs12Certificate = std::dynamic_pointer_cast<PKCS12Certificate>(certificate);
     if (!pkcs12Certificate || pkcs12Certificate->isNull()) {
diff --git a/Swiften/TLS/OpenSSL/OpenSSLContext.h b/Swiften/TLS/OpenSSL/OpenSSLContext.h
index 49ada51..5f06811 100644
--- a/Swiften/TLS/OpenSSL/OpenSSLContext.h
+++ b/Swiften/TLS/OpenSSL/OpenSSLContext.h
@@ -38,10 +38,14 @@ namespace std {
 namespace Swift {
     class OpenSSLContext : public TLSContext, boost::noncopyable {
         public:
-            OpenSSLContext();
+            OpenSSLContext(Mode mode);
             virtual ~OpenSSLContext() override final;
 
+            void accept() override final;
             void connect() override final;
+
+            bool setCertificateChain(const std::vector<Certificate::ref>& certificateChain) override final;
+            bool setPrivateKey(const PrivateKey::ref& privateKey) override final;
             bool setClientCertificate(CertificateWithKey::ref cert) override final;
 
             void handleDataFromNetwork(const SafeByteArray&) override final;
@@ -57,13 +61,16 @@ namespace Swift {
 
             static CertificateVerificationError::Type getVerificationErrorTypeForResult(int);
 
+            void initAndSetBIOs();
+            void doAccept();
             void doConnect();
             void sendPendingDataToNetwork();
             void sendPendingDataToApplication();
 
         private:
-            enum class State { Start, Connecting, Connected, Error };
+            enum class State { Start, Accepting, Connecting, Connected, Error };
 
+            Mode mode_;
             State state_;
             std::unique_ptr<SSL_CTX> context_;
             std::unique_ptr<SSL> handle_;
diff --git a/Swiften/TLS/OpenSSL/OpenSSLContextFactory.cpp b/Swiften/TLS/OpenSSL/OpenSSLContextFactory.cpp
index 9f7b2aa..af0966e 100644
--- a/Swiften/TLS/OpenSSL/OpenSSLContextFactory.cpp
+++ b/Swiften/TLS/OpenSSL/OpenSSLContextFactory.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2010-2016 Isode Limited.
+ * Copyright (c) 2010-2018 Isode Limited.
  * All rights reserved.
  * See the COPYING file for more information.
  */
@@ -15,8 +15,8 @@ bool OpenSSLContextFactory::canCreate() const {
     return true;
 }
 
-TLSContext* OpenSSLContextFactory::createTLSContext(const TLSOptions&) {
-    return new OpenSSLContext();
+TLSContext* OpenSSLContextFactory::createTLSContext(const TLSOptions&, TLSContext::Mode mode) {
+    return new OpenSSLContext(mode);
 }
 
 void OpenSSLContextFactory::setCheckCertificateRevocation(bool check) {
diff --git a/Swiften/TLS/OpenSSL/OpenSSLContextFactory.h b/Swiften/TLS/OpenSSL/OpenSSLContextFactory.h
index e121a1a..63fc17e 100644
--- a/Swiften/TLS/OpenSSL/OpenSSLContextFactory.h
+++ b/Swiften/TLS/OpenSSL/OpenSSLContextFactory.h
@@ -1,23 +1,21 @@
 /*
- * Copyright (c) 2010-2016 Isode Limited.
+ * Copyright (c) 2010-2018 Isode Limited.
  * All rights reserved.
  * See the COPYING file for more information.
  */
 
 #pragma once
 
-#include <cassert>
-
 #include <Swiften/TLS/TLSContextFactory.h>
 
 namespace Swift {
     class OpenSSLContextFactory : public TLSContextFactory {
         public:
-            bool canCreate() const;
-            virtual TLSContext* createTLSContext(const TLSOptions& tlsOptions);
+            bool canCreate() const override final;
+            virtual TLSContext* createTLSContext(const TLSOptions& tlsOptions, TLSContext::Mode mode) override final;
 
             // Not supported
-            virtual void setCheckCertificateRevocation(bool b);
-            virtual void setDisconnectOnCardRemoval(bool b);
+            virtual void setCheckCertificateRevocation(bool b) override final;
+            virtual void setDisconnectOnCardRemoval(bool b) override final;
     };
 }
diff --git a/Swiften/TLS/Schannel/SchannelContextFactory.cpp b/Swiften/TLS/Schannel/SchannelContextFactory.cpp
index f78d386..0015fbe 100644
--- a/Swiften/TLS/Schannel/SchannelContextFactory.cpp
+++ b/Swiften/TLS/Schannel/SchannelContextFactory.cpp
@@ -5,7 +5,7 @@
  */
 
 /*
- * Copyright (c) 2015-2016 Isode Limited.
+ * Copyright (c) 2015-2018 Isode Limited.
  * All rights reserved.
  * See the COPYING file for more information.
  */
@@ -23,7 +23,9 @@ bool SchannelContextFactory::canCreate() const {
     return true;
 }
 
-TLSContext* SchannelContextFactory::createTLSContext(const TLSOptions& tlsOptions) {
+TLSContext* SchannelContextFactory::createTLSContext(const TLSOptions& tlsOptions, TLSContext::Mode mode) {
+    // TLS server mode is not supported for the SecureTransport backend yet.
+    assert(mode == TLSContext::Mode::Client);
     SchannelContext* context = new SchannelContext(tlsOptions.schannelTLS1_0Workaround);
     context->setCheckCertificateRevocation(checkCertificateRevocation);
     context->setDisconnectOnCardRemoval(disconnectOnCardRemoval);
diff --git a/Swiften/TLS/Schannel/SchannelContextFactory.h b/Swiften/TLS/Schannel/SchannelContextFactory.h
index 142f193..f878037 100644
--- a/Swiften/TLS/Schannel/SchannelContextFactory.h
+++ b/Swiften/TLS/Schannel/SchannelContextFactory.h
@@ -5,7 +5,7 @@
  */
 
 /*
- * Copyright (c) 2015 Isode Limited.
+ * Copyright (c) 2015-2018 Isode Limited.
  * All rights reserved.
  * See the COPYING file for more information.
  */
@@ -20,8 +20,7 @@ namespace Swift {
             SchannelContextFactory();
 
             bool canCreate() const;
-            virtual TLSContext* createTLSContext(const TLSOptions& tlsOptions);
-
+            virtual TLSContext* createTLSContext(const TLSOptions& tlsOptions, TLSContext::Mode mode = TLSContext::Mode::Client);
             virtual void setCheckCertificateRevocation(bool b);
 
             virtual void setDisconnectOnCardRemoval(bool b);
diff --git a/Swiften/TLS/SecureTransport/SecureTransportContextFactory.cpp b/Swiften/TLS/SecureTransport/SecureTransportContextFactory.cpp
index 1fac1fb..dfb9d67 100644
--- a/Swiften/TLS/SecureTransport/SecureTransportContextFactory.cpp
+++ b/Swiften/TLS/SecureTransport/SecureTransportContextFactory.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2015-2016 Isode Limited.
+ * Copyright (c) 2015-2018 Isode Limited.
  * All rights reserved.
  * See the COPYING file for more information.
  */
@@ -26,7 +26,9 @@ bool SecureTransportContextFactory::canCreate() const {
     return true;
 }
 
-TLSContext* SecureTransportContextFactory::createTLSContext(const TLSOptions& /* tlsOptions */) {
+TLSContext* SecureTransportContextFactory::createTLSContext(const TLSOptions& /* tlsOptions */, TLSContext::Mode mode) {
+    // TLS server mode is not supported for the SecureTransport backend yet.
+    assert(mode == TLSContext::Mode::Client);
     return new SecureTransportContext(checkCertificateRevocation_);
 }
 
diff --git a/Swiften/TLS/SecureTransport/SecureTransportContextFactory.h b/Swiften/TLS/SecureTransport/SecureTransportContextFactory.h
index 74c598f..5962424 100644
--- a/Swiften/TLS/SecureTransport/SecureTransportContextFactory.h
+++ b/Swiften/TLS/SecureTransport/SecureTransportContextFactory.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2015 Isode Limited.
+ * Copyright (c) 2015-2018 Isode Limited.
  * All rights reserved.
  * See the COPYING file for more information.
  */
@@ -17,7 +17,7 @@ class SecureTransportContextFactory : public TLSContextFactory {
 
         virtual bool canCreate() const;
 
-        virtual TLSContext* createTLSContext(const TLSOptions& tlsOptions);
+        virtual TLSContext* createTLSContext(const TLSOptions& tlsOptions, TLSContext::Mode mode = TLSContext::Mode::Client);
         virtual void setCheckCertificateRevocation(bool b);
         virtual void setDisconnectOnCardRemoval(bool b);
 
diff --git a/Swiften/TLS/TLSContext.cpp b/Swiften/TLS/TLSContext.cpp
index 2763547..56814d2 100644
--- a/Swiften/TLS/TLSContext.cpp
+++ b/Swiften/TLS/TLSContext.cpp
@@ -1,16 +1,32 @@
 /*
- * Copyright (c) 2010 Isode Limited.
+ * Copyright (c) 2010-2018 Isode Limited.
  * All rights reserved.
  * See the COPYING file for more information.
  */
 
 #include <Swiften/TLS/TLSContext.h>
 
+#include <cassert>
+
 namespace Swift {
 
 TLSContext::~TLSContext() {
 }
 
+void TLSContext::accept() {
+     assert(false);
+}
+
+bool TLSContext::setCertificateChain(const std::vector<Certificate::ref>& /* certificateChain */) {
+    assert(false);
+    return false;
+}
+
+bool TLSContext::setPrivateKey(const PrivateKey::ref& /* privateKey */) {
+    assert(false);
+    return false;
+}
+
 Certificate::ref TLSContext::getPeerCertificate() const {
     std::vector<Certificate::ref> chain = getPeerCertificateChain();
     return chain.empty() ? Certificate::ref() : chain[0];
diff --git a/Swiften/TLS/TLSContext.h b/Swiften/TLS/TLSContext.h
index 79e3485..816f1c1 100644
--- a/Swiften/TLS/TLSContext.h
+++ b/Swiften/TLS/TLSContext.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2010-2016 Isode Limited.
+ * Copyright (c) 2010-2018 Isode Limited.
  * All rights reserved.
  * See the COPYING file for more information.
  */
@@ -15,6 +15,7 @@
 #include <Swiften/TLS/Certificate.h>
 #include <Swiften/TLS/CertificateVerificationError.h>
 #include <Swiften/TLS/CertificateWithKey.h>
+#include <Swiften/TLS/PrivateKey.h>
 #include <Swiften/TLS/TLSError.h>
 
 namespace Swift {
@@ -23,8 +24,12 @@ namespace Swift {
         public:
             virtual ~TLSContext();
 
+            virtual void accept();
             virtual void connect() = 0;
 
+            virtual bool setCertificateChain(const std::vector<Certificate::ref>& /* certificateChain */);
+            virtual bool setPrivateKey(const PrivateKey::ref& /* privateKey */);
+
             virtual bool setClientCertificate(CertificateWithKey::ref cert) = 0;
 
             virtual void handleDataFromNetwork(const SafeByteArray&) = 0;
@@ -37,6 +42,12 @@ namespace Swift {
             virtual ByteArray getFinishMessage() const = 0;
 
         public:
+            enum class Mode {
+                Client,
+                Server
+            };
+
+        public:
             boost::signals2::signal<void (const SafeByteArray&)> onDataForNetwork;
             boost::signals2::signal<void (const SafeByteArray&)> onDataForApplication;
             boost::signals2::signal<void (std::shared_ptr<TLSError>)> onError;
diff --git a/Swiften/TLS/TLSContextFactory.h b/Swiften/TLS/TLSContextFactory.h
index d2ffe15..ca9d98b 100644
--- a/Swiften/TLS/TLSContextFactory.h
+++ b/Swiften/TLS/TLSContextFactory.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2010-2015 Isode Limited.
+ * Copyright (c) 2010-2018 Isode Limited.
  * All rights reserved.
  * See the COPYING file for more information.
  */
@@ -7,18 +7,17 @@
 #pragma once
 
 #include <Swiften/Base/API.h>
+#include <Swiften/TLS/TLSContext.h>
 #include <Swiften/TLS/TLSOptions.h>
 
 namespace Swift {
-    class TLSContext;
-
     class SWIFTEN_API TLSContextFactory {
         public:
             virtual ~TLSContextFactory();
 
             virtual bool canCreate() const = 0;
 
-            virtual TLSContext* createTLSContext(const TLSOptions& tlsOptions) = 0;
+            virtual TLSContext* createTLSContext(const TLSOptions& tlsOptions, TLSContext::Mode = TLSContext::Mode::Client) = 0;
             virtual void setCheckCertificateRevocation(bool b) = 0;
             virtual void setDisconnectOnCardRemoval(bool b) = 0;
     };
diff --git a/Swiften/TLS/UnitTest/ClientServerTest.cpp b/Swiften/TLS/UnitTest/ClientServerTest.cpp
new file mode 100644
index 0000000..9aa1762
--- /dev/null
+++ b/Swiften/TLS/UnitTest/ClientServerTest.cpp
@@ -0,0 +1,574 @@
+/*
+ * Copyright (c) 2010-2018 Isode Limited.
+ * All rights reserved.
+ * See the COPYING file for more information.
+ */
+
+#include <map>
+#include <memory>
+#include <utility>
+#include <vector>
+
+#include <boost/variant.hpp>
+
+#include <gtest/gtest.h>
+
+#include <Swiften/Base/Log.h>
+#include <Swiften/TLS/CertificateFactory.h>
+#include <Swiften/TLS/PlatformTLSFactories.h>
+#include <Swiften/TLS/TLSContext.h>
+#include <Swiften/TLS/TLSContextFactory.h>
+#include <Swiften/TLS/TLSOptions.h>
+
+using namespace Swift;
+namespace {
+
+
+std::map<std::string, std::string> certificatePEM = {
+    {"montague.example",
+R"(-----BEGIN CERTIFICATE-----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+zqCzpwGL
+-----END CERTIFICATE-----
+)"},
+    {"capulet.example",
+R"(-----BEGIN CERTIFICATE-----
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+GMSL4g==
+-----END CERTIFICATE-----
+)"}};
+std::map<std::string, std::string> privateKeyPEM = {
+    {"montague.example",
+R"(-----BEGIN PRIVATE KEY-----
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+5IMXuORWuoq0gXiCdEyko+saXsyWlqw=
+-----END PRIVATE KEY-----
+)"},{"capulet.example",
+R"(-----BEGIN PRIVATE KEY-----
+MIIJQwIBADANBgkqhkiG9w0BAQEFAASCCS0wggkpAgEAAoICAQCgA/CpV7UGqUdj
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+mqAqcEHlTUnELOkiZjTj0CBq/OyF33xGyxLf1e/CibasAeJjtvr89+G/nGRoFGI9
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+BnRXFrzEQPJ9/j7Afjt8IdBOQ4dLeDwGI/NRiRXCgieHlZXZ6KY6xDYoROUmu5f8
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+O7PnAoIBAAggpMq7PMugGP4B9PgNb00oGmWfXSa+M83O0GGN7jSirxqkaK+/eDOY
+kSnVFWmORNBlSz+bLoA3Bw2mFXI8HfSbHM9E/Qt0scf0hV+SwpTuO3pDWF5ev20G
+mL1QEBUNDmvOn2SYERKI1iRevjBBXSzwTpAXnfaWvvTn1XSKzSJK3TjMhFTZHtbj
+mgPPV65cznhofUsg2QenT8zKisvYPYN3p3p9Jo6IqHyT/CCymwIB4OMZITiwXxQs
+PMAxlZGkX3Uri5A8Ln3QQ46elanI2TlC+ZDa84gu/Gw691JWCfsaSaQDTJKnGqos
+dwiNVl130YWaJLjiA9Poc2llKtypfQ8=
+-----END PRIVATE KEY-----
+)"}};
+
+auto montagueEncryptedPEM = R"(-----BEGIN RSA PRIVATE KEY-----
+Proc-Type: 4,ENCRYPTED
+DEK-Info: AES-256-CBC,6B0A69362920334824667C1B6207279B
+
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+in7Yt658hdf9CSA5snfUcvLeETNeQHQWvmN+0uD/UB9vRPbHp3kPSvitoS799QB1
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+cloY4yZVa+SWnj0P23oPdptL9vOM1NK1lXAp2tvvZHPp0UmLtXVU4eNaabC79dXC
+3KU9bVruCdpQki4kGk3MvsoB9OyNEZE1jxLZ+7FI0D1XKJ4qHZcwOyGqD07+Xect
+w2xs4stXxvogUZdQ3G6GBANFXEjDzEu5vZn9z668mCe0cQG/iNWOR5ZGmdjlmW5O
+6O9ibFmk7pc975V9SVHH9rS/GZGz/PW6CJ8O0GALw5y9fczXxjvCz7dPHK5MO40m
+fDWCwIqK1D2LOEewMFqOOleBhHMpVfQX+Uu34UlWHGFnOm1fK+dIdT7tss5o8Gkz
+gCBFpmjyi8H+VtXOy5JTTIi/80pnLO8nsv27FNPVU3UZJCZjfR9LCeqZwgF1MFIe
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+0UveWc1CDRa3qXpzW5U6NpFjYWQmiS3KA5VY5/KHE7UJxnEI1R1gEaQ6/Ogp2cmI
+-----END RSA PRIVATE KEY-----
+)";
+
+auto createTLSContext = [](TLSContext::Mode mode) {
+    auto tlsFactories = std::make_shared<PlatformTLSFactories>();
+
+    auto tlsContextFactory = tlsFactories->getTLSContextFactory();
+
+    auto tlsContext = std::unique_ptr<TLSContext>(tlsContextFactory->createTLSContext({}, mode));
+    return tlsContext;
+};
+
+// This connects a TLSContext to another TLSContext
+class ClientServerConnector {
+    public:
+        ClientServerConnector(TLSContext* client, TLSContext* server) : clientContext_(client), serverContext_(server) {
+            connections_.push_back(clientContext_->onDataForNetwork.connect([&](const SafeByteArray& data) {
+                serverContext_->handleDataFromNetwork(data);
+            }));
+            connections_.push_back(serverContext_->onDataForNetwork.connect([&](const SafeByteArray& data) {
+                clientContext_->handleDataFromNetwork(data);
+            }));
+        }
+
+    private:
+        TLSContext* clientContext_;
+        TLSContext* serverContext_;
+        std::vector<boost::signals2::connection> connections_;
+};
+
+struct TLSDataForNetwork {
+    SafeByteArray data;
+};
+
+struct TLSDataForApplication {
+    SafeByteArray data;
+};
+
+struct TLSFault {
+    std::shared_ptr<Swift::TLSError> error;
+};
+
+struct TLSConnected {
+    std::vector<Certificate::ref> chain;
+};
+
+using TLSEvent = boost::variant<TLSDataForNetwork, TLSDataForApplication, TLSFault, TLSConnected>;
+
+class TLSEventToSafeByteArrayVisitor : public boost::static_visitor<SafeByteArray> {
+    public:
+        SafeByteArray operator()(const TLSDataForNetwork& tlsData) const {
+            return tlsData.data;
+        }
+
+        SafeByteArray operator()(const TLSDataForApplication& tlsData) const {
+            return tlsData.data;
+        }
+
+        SafeByteArray operator()(const TLSFault&) const {
+            return createSafeByteArray("");
+        }
+
+        SafeByteArray operator()(const TLSConnected&) const {
+            return createSafeByteArray("");
+        }
+};
+
+class TLSEventToStringVisitor : public boost::static_visitor<std::string> {
+    public:
+        std::string operator()(const TLSDataForNetwork& event) const {
+            return std::string("TLSDataForNetwork(") + "size: " + std::to_string(event.data.size()) + ")";
+        }
+
+        std::string operator()(const TLSDataForApplication& event) const {
+            return std::string("TLSDataForApplication(") + "size: " + std::to_string(event.data.size()) + ")";
+        }
+
+        std::string operator()(const TLSFault&) const {
+            return "TLSFault()";
+        }
+
+        std::string operator()(const TLSConnected& event) const {
+            std::string certificates;
+            for (auto cert : event.chain) {
+                certificates += "\t" + cert->getSubjectName() + "\n";
+            }
+            return std::string("TLSConnected()") + "\n" + certificates;
+        }
+};
+
+class TLSClientServerEventHistory {
+    public:
+        TLSClientServerEventHistory(TLSContext* client, TLSContext* server) {
+            connectContext(std::string("client"), client);
+            connectContext(std::string("server"), server);
+        }
+
+        __attribute__((unused))
+        void print() {
+            auto count = 0;
+            std::cout << "\n";
+            for (auto event : events) {
+                if (event.first == "server") {
+                    std::cout << std::string(80, ' ');
+                }
+                std::cout << count << ". ";
+                std::cout << event.first << " : " << boost::apply_visitor(TLSEventToStringVisitor(), event.second) << std::endl;
+                count++;
+            }
+        }
+
+    private:
+        void connectContext(const std::string& name, TLSContext* context) {
+            connections_.push_back(context->onDataForNetwork.connect([=](const SafeByteArray& data) {
+                events.push_back(std::pair<std::string, TLSEvent>(name, TLSDataForNetwork{data}));
+            }));
+            connections_.push_back(context->onDataForApplication.connect([=](const SafeByteArray& data) {
+                events.push_back(std::pair<std::string, TLSEvent>(name, TLSDataForApplication{data}));
+            }));
+            connections_.push_back(context->onError.connect([=](std::shared_ptr<Swift::TLSError> error) {
+                events.push_back(std::pair<std::string, TLSEvent>(name, TLSFault{error}));
+            }));
+            connections_.push_back(context->onConnected.connect([=](){
+                events.push_back(std::pair<std::string, TLSEvent>(name, TLSConnected{context->getPeerCertificateChain()}));
+            }));
+        }
+
+    public:
+        std::vector<std::pair<std::string, TLSEvent>> events;
+
+    private:
+        std::vector<boost::signals2::connection> connections_;
+};
+
+}
+
+TEST(ClientServerTest, testInitAndFreeContext) {
+    auto tlsClientContext = createTLSContext(TLSContext::Mode::Client);
+    auto tlsServerContext = createTLSContext(TLSContext::Mode::Server);
+}
+
+TEST(ClientServerTest, testServerSetPrivateKey) {
+    auto tlsServerContext = createTLSContext(TLSContext::Mode::Server);
+}
+
+TEST(ClientServerTest, testServerSetCertificateChain) {
+    auto tlsServerContext = createTLSContext(TLSContext::Mode::Server);
+}
+
+TEST(ClientServerTest, testClientServerBasicCommunicationWithCertificateMissing) {
+    auto clientContext = createTLSContext(TLSContext::Mode::Client);
+    auto serverContext = createTLSContext(TLSContext::Mode::Server);
+
+    TLSClientServerEventHistory events(clientContext.get(), serverContext.get());
+
+    ClientServerConnector connector(clientContext.get(), serverContext.get());
+
+    auto tlsFactories = std::make_shared<PlatformTLSFactories>();
+
+    auto privateKey = tlsFactories->getCertificateFactory()->createPrivateKey(createSafeByteArray(privateKeyPEM["capulet.example"]));
+    ASSERT_NE(nullptr, privateKey.get());
+    ASSERT_EQ(true, serverContext->setPrivateKey(privateKey));
+
+    serverContext->accept();
+    clientContext->connect();
+
+    ASSERT_EQ("server", events.events[1].first);
+    ASSERT_EQ("TLSFault()", boost::apply_visitor(TLSEventToStringVisitor(), events.events[1].second));
+}
+
+TEST(ClientServerTest, testClientServerBasicCommunicationWithPrivateKeyMissing) {
+    auto clientContext = createTLSContext(TLSContext::Mode::Client);
+    auto serverContext = createTLSContext(TLSContext::Mode::Server);
+
+    TLSClientServerEventHistory events(clientContext.get(), serverContext.get());
+
+    ClientServerConnector connector(clientContext.get(), serverContext.get());
+
+    auto tlsFactories = std::make_shared<PlatformTLSFactories>();
+
+    ASSERT_EQ(true, serverContext->setCertificateChain(tlsFactories->getCertificateFactory()->createCertificateChain(createByteArray(certificatePEM["capulet.example"]))));
+
+    serverContext->accept();
+    clientContext->connect();
+
+    ASSERT_EQ("server", events.events[1].first);
+    ASSERT_EQ("TLSFault()", boost::apply_visitor(TLSEventToStringVisitor(), events.events[1].second));
+}
+
+TEST(ClientServerTest, testWrongPrivateKeyAfterCertificate) {
+    auto clientContext = createTLSContext(TLSContext::Mode::Client);
+    auto serverContext = createTLSContext(TLSContext::Mode::Server);
+
+    TLSClientServerEventHistory events(clientContext.get(), serverContext.get());
+
+    ClientServerConnector connector(clientContext.get(), serverContext.get());
+
+    auto tlsFactories = std::make_shared<PlatformTLSFactories>();
+
+    ASSERT_EQ(true, serverContext->setCertificateChain(tlsFactories->getCertificateFactory()->createCertificateChain(createByteArray(certificatePEM["capulet.example"]))));
+
+    auto privateKey = tlsFactories->getCertificateFactory()->createPrivateKey(createSafeByteArray(privateKeyPEM["montague.example"]));
+    ASSERT_NE(nullptr, privateKey.get());
+    ASSERT_EQ(false, serverContext->setPrivateKey(privateKey));
+
+    serverContext->accept();
+    clientContext->connect();
+}
+
+TEST(ClientServerTest, testWrongCertificateAfterPrivateKey) {
+    auto clientContext = createTLSContext(TLSContext::Mode::Client);
+    auto serverContext = createTLSContext(TLSContext::Mode::Server);
+
+    TLSClientServerEventHistory events(clientContext.get(), serverContext.get());
+
+    ClientServerConnector connector(clientContext.get(), serverContext.get());
+
+    auto tlsFactories = std::make_shared<PlatformTLSFactories>();
+
+    auto privateKey = tlsFactories->getCertificateFactory()->createPrivateKey(createSafeByteArray(privateKeyPEM["montague.example"]));
+    ASSERT_NE(nullptr, privateKey.get());
+    ASSERT_EQ(true, serverContext->setPrivateKey(privateKey));
+
+    ASSERT_EQ(true, serverContext->setCertificateChain(tlsFactories->getCertificateFactory()->createCertificateChain(createByteArray(certificatePEM["capulet.example"]))));
+
+    serverContext->accept();
+    clientContext->connect();
+
+    ASSERT_EQ("server", events.events[1].first);
+    ASSERT_EQ("TLSFault()", boost::apply_visitor(TLSEventToStringVisitor(), events.events[1].second));
+}
+
+TEST(ClientServerTest, testClientServerBasicCommunication) {
+    auto clientContext = createTLSContext(TLSContext::Mode::Client);
+    auto serverContext = createTLSContext(TLSContext::Mode::Server);
+
+    TLSClientServerEventHistory events(clientContext.get(), serverContext.get());
+
+    ClientServerConnector connector(clientContext.get(), serverContext.get());
+
+    auto tlsFactories = std::make_shared<PlatformTLSFactories>();
+
+    ASSERT_EQ(true, serverContext->setCertificateChain(tlsFactories->getCertificateFactory()->createCertificateChain(createByteArray(certificatePEM["capulet.example"]))));
+
+    auto privateKey = tlsFactories->getCertificateFactory()->createPrivateKey(createSafeByteArray(privateKeyPEM["capulet.example"]));
+    ASSERT_NE(nullptr, privateKey.get());
+    ASSERT_EQ(true, serverContext->setPrivateKey(privateKey));
+
+    serverContext->accept();
+    clientContext->connect();
+
+    clientContext->handleDataFromApplication(createSafeByteArray("This is a test message from the client."));
+    serverContext->handleDataFromApplication(createSafeByteArray("This is a test message from the server."));
+
+    ASSERT_EQ(safeByteArrayToString(createSafeByteArray("This is a test message from the client.")), safeByteArrayToString(boost::apply_visitor(TLSEventToSafeByteArrayVisitor(), std::find_if(events.events.begin(), events.events.end(), [](std::pair<std::string, TLSEvent>& event){
+        return event.first == "server" && (event.second.type() == typeid(TLSDataForApplication));
+    })->second)));
+    ASSERT_EQ(safeByteArrayToString(createSafeByteArray("This is a test message from the server.")), safeByteArrayToString(boost::apply_visitor(TLSEventToSafeByteArrayVisitor(), std::find_if(events.events.begin(), events.events.end(), [](std::pair<std::string, TLSEvent>& event){
+        return event.first == "client" && (event.second.type() == typeid(TLSDataForApplication));
+    })->second)));
+}
+
+TEST(ClientServerTest, testClientServerBasicCommunicationEncryptedPrivateKeyRightPassword) {
+    auto clientContext = createTLSContext(TLSContext::Mode::Client);
+    auto serverContext = createTLSContext(TLSContext::Mode::Server);
+
+    TLSClientServerEventHistory events(clientContext.get(), serverContext.get());
+
+    ClientServerConnector connector(clientContext.get(), serverContext.get());
+
+    auto tlsFactories = std::make_shared<PlatformTLSFactories>();
+
+    ASSERT_EQ(true, serverContext->setCertificateChain(tlsFactories->getCertificateFactory()->createCertificateChain(createByteArray(certificatePEM["montague.example"]))));
+
+    auto privateKey = tlsFactories->getCertificateFactory()->createPrivateKey(createSafeByteArray(montagueEncryptedPEM), createSafeByteArray("test"));
+    ASSERT_NE(nullptr, privateKey.get());
+    ASSERT_EQ(true, serverContext->setPrivateKey(privateKey));
+
+    serverContext->accept();
+    clientContext->connect();
+
+    clientContext->handleDataFromApplication(createSafeByteArray("This is a test message from the client."));
+    serverContext->handleDataFromApplication(createSafeByteArray("This is a test message from the server."));
+
+    ASSERT_EQ(safeByteArrayToString(createSafeByteArray("This is a test message from the client.")), safeByteArrayToString(boost::apply_visitor(TLSEventToSafeByteArrayVisitor(), std::find_if(events.events.begin(), events.events.end(), [](std::pair<std::string, TLSEvent>& event){
+        return event.first == "server" && (event.second.type() == typeid(TLSDataForApplication));
+    })->second)));
+    ASSERT_EQ(safeByteArrayToString(createSafeByteArray("This is a test message from the server.")), safeByteArrayToString(boost::apply_visitor(TLSEventToSafeByteArrayVisitor(), std::find_if(events.events.begin(), events.events.end(), [](std::pair<std::string, TLSEvent>& event){
+        return event.first == "client" && (event.second.type() == typeid(TLSDataForApplication));
+    })->second)));
+}
+
+TEST(ClientServerTest, testSettingPrivateKeyWithWrongPassword) {
+    auto clientContext = createTLSContext(TLSContext::Mode::Client);
+    auto serverContext = createTLSContext(TLSContext::Mode::Server);
+
+    TLSClientServerEventHistory events(clientContext.get(), serverContext.get());
+
+    ClientServerConnector connector(clientContext.get(), serverContext.get());
+
+    auto tlsFactories = std::make_shared<PlatformTLSFactories>();
+
+    ASSERT_EQ(true, serverContext->setCertificateChain(tlsFactories->getCertificateFactory()->createCertificateChain(createByteArray(certificatePEM["montague.example"]))));
+
+    auto privateKey = tlsFactories->getCertificateFactory()->createPrivateKey(createSafeByteArray(montagueEncryptedPEM), createSafeByteArray("foo"));
+    ASSERT_NE(nullptr, privateKey.get());
+    ASSERT_EQ(false, serverContext->setPrivateKey(privateKey));
+}
+
+TEST(ClientServerTest, testSettingPrivateKeyWithoutRequiredPassword) {
+    auto clientContext = createTLSContext(TLSContext::Mode::Client);
+    auto serverContext = createTLSContext(TLSContext::Mode::Server);
+
+    TLSClientServerEventHistory events(clientContext.get(), serverContext.get());
+
+    ClientServerConnector connector(clientContext.get(), serverContext.get());
+
+    auto tlsFactories = std::make_shared<PlatformTLSFactories>();
+
+    ASSERT_EQ(true, serverContext->setCertificateChain(tlsFactories->getCertificateFactory()->createCertificateChain(createByteArray(certificatePEM["montague.example"]))));
+
+    auto privateKey = tlsFactories->getCertificateFactory()->createPrivateKey(createSafeByteArray(montagueEncryptedPEM));
+    ASSERT_NE(nullptr, privateKey.get());
+    ASSERT_EQ(false, serverContext->setPrivateKey(privateKey));
+}