15 files changed, 204 insertions, 242 deletions
diff --git a/Swiften/Client/CoreClient.cpp b/Swiften/Client/CoreClient.cpp
index 36bfe35..e2a8e5a 100644
--- a/Swiften/Client/CoreClient.cpp
+++ b/Swiften/Client/CoreClient.cpp
@@ -126,19 +126,6 @@ void CoreClient::bindSessionToStream() {
 	session_->start();
 }
 
-bool CoreClient::isCAPIURI() {
-#ifdef HAVE_SCHANNEL
-	if (!boost::iequals(certificate_.substr(0, 10), "certstore:")) {
-		return false;
-	}
-
-	return true;
-
-#else
-	return false;
-#endif
-}
-
 /**
  * Only called for TCP sessions. BOSH is handled inside the BOSHSessionStream.
  */
@@ -156,20 +143,8 @@ void CoreClient::handleConnectorFinished(boost::shared_ptr<Connection> connectio
 
 		assert(!sessionStream_);
 		sessionStream_ = boost::make_shared<BasicSessionStream>(ClientStreamType, connection_, getPayloadParserFactories(), getPayloadSerializers(), networkFactories->getTLSContextFactory(), networkFactories->getTimerFactory(), networkFactories->getXMLParserFactory());
-		if (!certificate_.empty()) {
-			CertificateWithKey* cert;
-
-#if defined(SWIFTEN_PLATFORM_WIN32)
-			if (isCAPIURI()) {
-				cert = new CAPICertificate(certificate_);
-			} else {
-				cert = new PKCS12Certificate(certificate_, password_);
-			}
-#else
-			cert = new PKCS12Certificate(certificate_, password_);
-#endif
-
-			sessionStream_->setTLSCertificate(cert);
+		if (certificate_ && !certificate_->isNull()) {
+			sessionStream_->setTLSCertificate(certificate_);
 		}
 		sessionStream_->onDataRead.connect(boost::bind(&CoreClient::handleDataRead, this, _1));
 		sessionStream_->onDataWritten.connect(boost::bind(&CoreClient::handleDataWritten, this, _1));
@@ -190,7 +165,7 @@ void CoreClient::disconnect() {
 	}
 }
 
-void CoreClient::setCertificate(const std::string& certificate) {
+void CoreClient::setCertificate(CertificateWithKey::ref certificate) {
 	certificate_ = certificate;
 }
 
diff --git a/Swiften/Client/CoreClient.h b/Swiften/Client/CoreClient.h
index 6712e03..1b875d2 100644
--- a/Swiften/Client/CoreClient.h
+++ b/Swiften/Client/CoreClient.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2010 Remko Tronçon
+ * Copyright (c) 2010-2012 Remko Tronçon
  * Licensed under the GNU General Public License v3.
  * See Documentation/Licenses/GPLv3.txt for more information.
  */
@@ -15,6 +15,7 @@
 #include <Swiften/Client/ClientError.h>
 #include <Swiften/Client/ClientOptions.h>
 #include <Swiften/Base/SafeByteArray.h>
+#include <Swiften/TLS/CertificateWithKey.h>
 
 namespace Swift {
 	class ChainedConnector;
@@ -53,7 +54,12 @@ namespace Swift {
 			CoreClient(const JID& jid, const SafeByteArray& password, NetworkFactories* networkFactories);
 			~CoreClient();
 
-			void setCertificate(const std::string& certificate);
+			/**
+			 * Set a client certificate to use for strong authentication with the server.
+			 * Ensure that it is of the correct type for the TLS engine in use.
+			 * This means, largely, PKCS12Certificate for OpenSSL and CAPICertificate for CAPI.
+			 */
+			void setCertificate(CertificateWithKey::ref certificate);
 
 			/**
 			 * Connects the client to the server.
@@ -227,7 +233,7 @@ namespace Swift {
 			boost::shared_ptr<Connection> connection_;
 			boost::shared_ptr<SessionStream> sessionStream_;
 			boost::shared_ptr<ClientSession> session_;
-			std::string certificate_;
+			CertificateWithKey::ref certificate_;
 			bool disconnectRequested_;
 			CertificateTrustChecker* certificateTrustChecker;
 	};
diff --git a/Swiften/Session/SessionStream.cpp b/Swiften/Session/SessionStream.cpp
index 487ad8b..0d73b63 100644
--- a/Swiften/Session/SessionStream.cpp
+++ b/Swiften/Session/SessionStream.cpp
@@ -9,7 +9,6 @@
 namespace Swift {
 
 SessionStream::~SessionStream() {
-	delete certificate;
 }
 
 };
diff --git a/Swiften/Session/SessionStream.h b/Swiften/Session/SessionStream.h
index 58015b3..2ff2a56 100644
--- a/Swiften/Session/SessionStream.h
+++ b/Swiften/Session/SessionStream.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2010 Remko Tronçon
+ * Copyright (c) 2010-2012 Remko Tronçon
  * Licensed under the GNU General Public License v3.
  * See Documentation/Licenses/GPLv3.txt for more information.
  */
@@ -36,7 +36,7 @@ namespace Swift {
 					Type type;
 			};
 
-			SessionStream(): certificate(0) {}
+			SessionStream(): certificate() {}
 
 			virtual ~SessionStream();
 
@@ -58,7 +58,7 @@ namespace Swift {
 
 			virtual void resetXMPPParser() = 0;
 
-			void setTLSCertificate(CertificateWithKey* cert) {
+			void setTLSCertificate(CertificateWithKey::ref cert) {
 				certificate = cert;
 			}
 
@@ -79,11 +79,11 @@ namespace Swift {
 			boost::signal<void (const SafeByteArray&)> onDataWritten;
 
 		protected:
-			CertificateWithKey * getTLSCertificate() const {
+			CertificateWithKey::ref getTLSCertificate() const {
 				return certificate;
 			}
 
 		private:
-			CertificateWithKey * certificate;
+			CertificateWithKey::ref certificate;
 	};
 }
diff --git a/Swiften/StreamStack/TLSLayer.cpp b/Swiften/StreamStack/TLSLayer.cpp
index b7efbcb..6d416bc 100644
--- a/Swiften/StreamStack/TLSLayer.cpp
+++ b/Swiften/StreamStack/TLSLayer.cpp
@@ -37,7 +37,7 @@ void TLSLayer::handleDataRead(const SafeByteArray& data) {
 	context->handleDataFromNetwork(data);
 }
 
-bool TLSLayer::setClientCertificate(CertificateWithKey * certificate) {
+bool TLSLayer::setClientCertificate(CertificateWithKey::ref certificate) {
 	return context->setClientCertificate(certificate);
 }
 
diff --git a/Swiften/StreamStack/TLSLayer.h b/Swiften/StreamStack/TLSLayer.h
index 6dc9135..5aab26a 100644
--- a/Swiften/StreamStack/TLSLayer.h
+++ b/Swiften/StreamStack/TLSLayer.h
@@ -9,12 +9,12 @@
 #include <Swiften/Base/SafeByteArray.h>
 #include <Swiften/StreamStack/StreamLayer.h>
 #include <Swiften/TLS/Certificate.h>
+#include <Swiften/TLS/CertificateWithKey.h>
 #include <Swiften/TLS/CertificateVerificationError.h>
 
 namespace Swift {
 	class TLSContext;
 	class TLSContextFactory;
-	class CertificateWithKey;
 
 	class TLSLayer : public StreamLayer {
 		public:
@@ -22,7 +22,7 @@ namespace Swift {
 			~TLSLayer();
 
 			void connect();
-			bool setClientCertificate(CertificateWithKey * cert);
+			bool setClientCertificate(CertificateWithKey::ref cert);
 
 			Certificate::ref getPeerCertificate() const;
 			boost::shared_ptr<CertificateVerificationError> getPeerCertificateVerificationError() const;
diff --git a/Swiften/TLS/CAPICertificate.cpp b/Swiften/TLS/CAPICertificate.cpp
new file mode 100644
index 0000000..9a3bbc8
--- /dev/null
+++ b/Swiften/TLS/CAPICertificate.cpp
@@ -0,0 +1,151 @@
+/*
+ * Copyright (c) 2012 Isode Limited, London, England.
+ * Licensed under the simplified BSD license.
+ * See Documentation/Licenses/BSD-simplified.txt for more information.
+ */
+#pragma once
+
+#include <Swiften/TLS/CAPICertificate.h>
+
+#include <boost/algorithm/string/predicate.hpp>
+
+
+namespace Swift {
+CAPICertificate::CAPICertificate(const std::string& capiUri)
+			  		 : valid_(false), uri_(capiUri), certStoreHandle_(0), certStore_(), certName_() {
+	setUri(capiUri);
+}
+
+CAPICertificate::~CAPICertificate() {
+	if (certStoreHandle_) {
+		CertCloseStore(certStoreHandle_, 0);
+	}
+}
+
+bool CAPICertificate::isNull() const {
+	return uri_.empty() || !valid_;
+}
+
+const std::string& CAPICertificate::getCertStoreName() const {
+	return certStore_;
+}
+
+const std::string& CAPICertificate::getCertName() const {
+	return certName_;
+}
+
+void CAPICertificate::setUri (const std::string& capiUri) {
+
+	valid_ = false;
+
+	/* Syntax: "certstore:" [<cert_store> ":"] <cert_id> */
+
+	if (!boost::iequals(capiUri.substr(0, 10), "certstore:")) {
+		return;
+	}
+
+	/* Substring of subject: uses "storename" */
+	std::string capi_identity = capiUri.substr(10);
+	std::string new_certStore_name;
+	size_t pos = capi_identity.find_first_of (':');
+
+	if (pos == std::string::npos) {
+		/* Using the default certificate store */
+		new_certStore_name = "MY";
+		certName_ = capi_identity;
+	}
+	else {
+		new_certStore_name = capi_identity.substr(0, pos);
+		certName_ = capi_identity.substr(pos + 1);
+	}
+
+	PCCERT_CONTEXT pCertContext = NULL;
+
+	if (certStoreHandle_ != NULL) {
+		if (new_certStore_name != certStore_) {
+			CertCloseStore(certStoreHandle_, 0);
+			certStoreHandle_ = NULL;
+		}
+	}
+
+	if (certStoreHandle_ == NULL) {
+		certStoreHandle_ = CertOpenSystemStore(0, certStore_.c_str());
+		if (!certStoreHandle_) {
+			return;
+		}
+	}
+
+	certStore_ = new_certStore_name;
+
+	/* NB: This might have to change, depending on how we locate certificates */
+
+	// Find client certificate. Note that this sample just searches for a
+	// certificate that contains the user name somewhere in the subject name.
+	pCertContext = CertFindCertificateInStore(certStoreHandle_,
+			X509_ASN_ENCODING,
+			0,				// dwFindFlags
+			CERT_FIND_SUBJECT_STR_A,
+			certName_.c_str(),		// *pvFindPara
+			NULL );				// pPrevCertContext
+
+	if (!pCertContext) {
+		return;
+	}
+
+
+	/* Now verify that we can have access to the corresponding private key */
+
+	DWORD len;
+	CRYPT_KEY_PROV_INFO *pinfo;
+	HCRYPTPROV hprov;
+	HCRYPTKEY key;
+
+	if (!CertGetCertificateContextProperty(pCertContext,
+			CERT_KEY_PROV_INFO_PROP_ID,
+			NULL,
+			&len)) {
+		CertFreeCertificateContext(pCertContext);
+		return;
+	}
+
+	pinfo = static_cast<CRYPT_KEY_PROV_INFO *>(malloc(len));
+	if (!pinfo) {
+		CertFreeCertificateContext(pCertContext);
+		return;
+	}
+
+	if (!CertGetCertificateContextProperty(pCertContext,
+			CERT_KEY_PROV_INFO_PROP_ID,
+			pinfo,
+			&len)) {
+		CertFreeCertificateContext(pCertContext);
+		free(pinfo);
+		return;
+	}
+
+	CertFreeCertificateContext(pCertContext);
+
+	// Now verify if we have access to the private key
+	if (!CryptAcquireContextW(&hprov,
+			pinfo->pwszContainerName,
+			pinfo->pwszProvName,
+			pinfo->dwProvType,
+			0)) {
+		free(pinfo);
+		return;
+	}
+
+	if (!CryptGetUserKey(hprov, pinfo->dwKeySpec, &key)) {
+		CryptReleaseContext(hprov, 0);
+		free(pinfo);
+		return;
+	}
+
+	CryptDestroyKey(key);
+	CryptReleaseContext(hprov, 0);
+	free(pinfo);
+
+	valid_ = true;
+}
+
+}
diff --git a/Swiften/TLS/CAPICertificate.h b/Swiften/TLS/CAPICertificate.h
index fcdb4c2..d9e2704 100644
--- a/Swiften/TLS/CAPICertificate.h
+++ b/Swiften/TLS/CAPICertificate.h
@@ -9,188 +9,34 @@
 #include <Swiften/Base/SafeByteArray.h>
 #include <Swiften/TLS/CertificateWithKey.h>
 
-#include <boost/algorithm/string/predicate.hpp>
-
 #define SECURITY_WIN32
+#include <Windows.h>
 #include <WinCrypt.h>
 
 namespace Swift {
 	class CAPICertificate : public Swift::CertificateWithKey {
 		public:
-			CAPICertificate(const std::string& capiUri)
-			    : valid_(false), uri_(capiUri), cert_store_handle_(0), cert_store_(NULL), cert_name_(NULL) {
-				setUri(capiUri);
-			}
-
-			virtual ~CAPICertificate() {
-				if (cert_store_handle_ != NULL)
-				{
-					CertCloseStore(cert_store_handle_, 0);
-				}
-			}
-
-			virtual bool isNull() const {
-				return uri_.empty() || !valid_;
-			}
-
-			virtual bool isPrivateKeyExportable() const {
-				/* We can check with CAPI, but for now the answer is "no" */
-				return false;
-			}
-
-			virtual const std::string& getCertStoreName() const {
-			    return cert_store_;
-			}
-
-			virtual const std::string& getCertName() const {
-			    return cert_name_;
-			}
-
-			const ByteArray& getData() const {
-////Might need to throw an exception here, or really generate PKCS12 blob from CAPI data?
-				assert(0);
-			}
-
-			void setData(const ByteArray& data) {
-				assert(0);
-			}
-
-			const SafeByteArray& getPassword() const {
-/////Can't pass NULL to createSafeByteArray!
-/////Should this throw an exception instead?
-				return createSafeByteArray("");
-			}
-
-		protected:
-			void setUri (const std::string& capiUri) {
-
-				valid_ = false;
-
-				/* Syntax: "certstore:" [<cert_store> ":"] <cert_id> */
-
-				if (!boost::iequals(capiUri.substr(0, 10), "certstore:")) {
-					return;
-				}
-
-				/* Substring of subject: uses "storename" */
-				std::string capi_identity = capiUri.substr(10);
-				std::string new_cert_store_name;
-				size_t pos = capi_identity.find_first_of (':');
-
-				if (pos == std::string::npos) {
-					/* Using the default certificate store */
-					new_cert_store_name = "MY";
-					cert_name_ = capi_identity;
-				} else {
-					new_cert_store_name = capi_identity.substr(0, pos);
-					cert_name_ = capi_identity.substr(pos + 1);
-				}
+			CAPICertificate(const std::string& capiUri);
 
-				PCCERT_CONTEXT pCertContext = NULL;
+			virtual ~CAPICertificate();
 
-				if (cert_store_handle_ != NULL)
-				{
-					if (new_cert_store_name != cert_store_) {
-						CertCloseStore(cert_store_handle_, 0);
-						cert_store_handle_ = NULL;
-					}
-				}
+			virtual bool isNull() const;
 
-				if (cert_store_handle_ == NULL)
-				{
-					cert_store_handle_ = CertOpenSystemStore(0, cert_store_.c_str());
-					if (!cert_store_handle_)
-					{
-						return;
-					}
-				}
+			const std::string& getCertStoreName() const;
 
-				cert_store_ = new_cert_store_name;
+			const std::string& getCertName() const;
 
-				/* NB: This might have to change, depending on how we locate certificates */
-
-				// Find client certificate. Note that this sample just searches for a 
-				// certificate that contains the user name somewhere in the subject name.
-				pCertContext = CertFindCertificateInStore(cert_store_handle_,
-					X509_ASN_ENCODING,
-					0,				// dwFindFlags
-					CERT_FIND_SUBJECT_STR_A,
-					cert_name_.c_str(),		// *pvFindPara
-					NULL );				// pPrevCertContext
-
-				if (pCertContext == NULL)
-				{
-					return;
-				}
-
-
-				/* Now verify that we can have access to the corresponding private key */
-
-				DWORD len;
-				CRYPT_KEY_PROV_INFO *pinfo;
-				HCRYPTPROV hprov;
-				HCRYPTKEY key;
-
-				if (!CertGetCertificateContextProperty(pCertContext,
-								       CERT_KEY_PROV_INFO_PROP_ID,
-								       NULL,
-								       &len))
-				{
-					CertFreeCertificateContext(pCertContext);
-					return;
-				}
-
-				pinfo = static_cast<CRYPT_KEY_PROV_INFO *>(malloc(len));
-				if (!pinfo) {
-					CertFreeCertificateContext(pCertContext);
-					return;
-				}
-
-				if (!CertGetCertificateContextProperty(pCertContext,
-								       CERT_KEY_PROV_INFO_PROP_ID,
-								       pinfo,
-								       &len))
-				{
-					CertFreeCertificateContext(pCertContext);
-					free(pinfo);
-					return;
-				}
-
-				CertFreeCertificateContext(pCertContext);
-
-				// Now verify if we have access to the private key
-				if (!CryptAcquireContextW(&hprov,
-							  pinfo->pwszContainerName,
-							  pinfo->pwszProvName,
-							  pinfo->dwProvType,
-							  0))
-				{
-					free(pinfo);
-					return;
-				}
-
-				if (!CryptGetUserKey(hprov, pinfo->dwKeySpec, &key))
-				{
-					CryptReleaseContext(hprov, 0);
-					free(pinfo);
-					return;
-				}
-
-				CryptDestroyKey(key);
-				CryptReleaseContext(hprov, 0);
-				free(pinfo);
-
-				valid_ = true;
-			}
+		private:
+			void setUri (const std::string& capiUri);
 
 		private:
 			bool valid_;
 			std::string uri_;
 
-			HCERTSTORE cert_store_handle_;
+			HCERTSTORE certStoreHandle_;
 
 			/* Parsed components of the uri_ */
-			std::string cert_store_;
-			std::string cert_name_;
+			std::string certStore_;
+			std::string certName_;
 	};
 }
diff --git a/Swiften/TLS/CertificateWithKey.h b/Swiften/TLS/CertificateWithKey.h
index 6f6ea39..1bdeb03 100644
--- a/Swiften/TLS/CertificateWithKey.h
+++ b/Swiften/TLS/CertificateWithKey.h
@@ -11,22 +11,12 @@
 namespace Swift {
 	class CertificateWithKey {
 		public:
+			typedef boost::shared_ptr<CertificateWithKey> ref;
 			CertificateWithKey() {}
 
 			virtual ~CertificateWithKey() {}
 
 			virtual bool isNull() const = 0;
 
-			virtual bool isPrivateKeyExportable() const = 0;
-
-			virtual const std::string& getCertStoreName() const = 0;
-
-			virtual const std::string& getCertName() const = 0;
-
-			virtual const ByteArray& getData() const = 0;
-
-			virtual void setData(const ByteArray& data) = 0;
-
-			virtual const SafeByteArray& getPassword() const = 0;
 	};
 }
diff --git a/Swiften/TLS/OpenSSL/OpenSSLContext.cpp b/Swiften/TLS/OpenSSL/OpenSSLContext.cpp
index dd3462f..8076967 100644
--- a/Swiften/TLS/OpenSSL/OpenSSLContext.cpp
+++ b/Swiften/TLS/OpenSSL/OpenSSLContext.cpp
@@ -186,17 +186,14 @@ void OpenSSLContext::sendPendingDataToApplication() {
 }
 
 bool OpenSSLContext::setClientCertificate(CertificateWithKey * certificate) {
-	if (!certificate || certificate->isNull()) {
-		return false;
-	}
-
-	if (!certificate->isPrivateKeyExportable()) {
+	boost::shared_ptr<PKCS12Certificate> pkcs12Certificate = boost::dynamic_pointer_cast<PKCS12Certificate>(certificate);
+	if (!pkcs12Certificate || pkcs12Certificate->isNull()) {
 		return false;
 	}
 
 	// Create a PKCS12 structure
 	BIO* bio = BIO_new(BIO_s_mem());
-	BIO_write(bio, vecptr(certificate->getData()), certificate->getData().size());
+	BIO_write(bio, vecptr(certificate->getData()), pkcs12Certificate->getData().size());
 	boost::shared_ptr<PKCS12> pkcs12(d2i_PKCS12_bio(bio, NULL), PKCS12_free);
 	BIO_free(bio);
 	if (!pkcs12) {
@@ -207,7 +204,7 @@ bool OpenSSLContext::setClientCertificate(CertificateWithKey * certificate) {
 	X509 *certPtr = 0;
 	EVP_PKEY* privateKeyPtr = 0;
 	STACK_OF(X509)* caCertsPtr = 0;
-	int result = PKCS12_parse(pkcs12.get(), reinterpret_cast<const char*>(vecptr(certificate->getPassword())), &privateKeyPtr, &certPtr, &caCertsPtr);
+	int result = PKCS12_parse(pkcs12.get(), reinterpret_cast<const char*>(vecptr(pkcs12Certificate->getPassword())), &privateKeyPtr, &certPtr, &caCertsPtr);
 	if (result != 1) { 
 		return false;
 	}
diff --git a/Swiften/TLS/OpenSSL/OpenSSLContext.h b/Swiften/TLS/OpenSSL/OpenSSLContext.h
index b53e715..e98fb49 100644
--- a/Swiften/TLS/OpenSSL/OpenSSLContext.h
+++ b/Swiften/TLS/OpenSSL/OpenSSLContext.h
@@ -22,7 +22,7 @@ namespace Swift {
 			~OpenSSLContext();
 
 			void connect();
-			bool setClientCertificate(CertificateWithKey * cert);
+			bool setClientCertificate(CertificateWithKey::ref cert);
 
 			void handleDataFromNetwork(const SafeByteArray&);
 			void handleDataFromApplication(const SafeByteArray&);
diff --git a/Swiften/TLS/SConscript b/Swiften/TLS/SConscript
index a71a446..0e95b8b 100644
--- a/Swiften/TLS/SConscript
+++ b/Swiften/TLS/SConscript
@@ -20,6 +20,7 @@ if myenv.get("HAVE_OPENSSL", 0) :
 	myenv.Append(CPPDEFINES = "HAVE_OPENSSL")
 elif myenv.get("HAVE_SCHANNEL", 0) :
 	objects += myenv.StaticObject([
+			"CAPICertificate.cpp",
 			"Schannel/SchannelContext.cpp",
 			"Schannel/SchannelCertificate.cpp",
 			"Schannel/SchannelContextFactory.cpp",
diff --git a/Swiften/TLS/Schannel/SchannelContext.cpp b/Swiften/TLS/Schannel/SchannelContext.cpp
index 6f50b3a..ddbebcb 100644
--- a/Swiften/TLS/Schannel/SchannelContext.cpp
+++ b/Swiften/TLS/Schannel/SchannelContext.cpp
@@ -4,8 +4,9 @@
  * See Documentation/Licenses/BSD-simplified.txt for more information.
  */
 
-#include "Swiften/TLS/Schannel/SchannelContext.h"
-#include "Swiften/TLS/Schannel/SchannelCertificate.h"
+#include <Swiften/TLS/Schannel/SchannelContext.h>
+#include <Swiften/TLS/Schannel/SchannelCertificate.h>
+#include <Swiften/TLS/CAPICertificate.h>
 
 namespace Swift {
 
@@ -17,7 +18,7 @@ SchannelContext::SchannelContext()
 , m_verificationError(CertificateVerificationError::UnknownError)
 , m_my_cert_store(NULL)
 , m_cert_store_name("MY")
-, m_cert_name(NULL)
+, m_cert_name()
 {
 	m_ctxtFlags = ISC_REQ_ALLOCATE_MEMORY | 
 				  ISC_REQ_CONFIDENTIALITY |
@@ -517,22 +518,18 @@ void SchannelContext::encryptAndSendData(const SafeByteArray& data)
 
 //------------------------------------------------------------------------
 
-bool SchannelContext::setClientCertificate(CertificateWithKey * certificate)
+bool SchannelContext::setClientCertificate(CertificateWithKey::ref certificate)
 {
-	if (!certificate || certificate->isNull()) {
+	boost::shared_ptr<CAPICertificate> capiCertificate = boost::dynamic_pointer_cast<CAPICertificate>(certificate);
+	if (!capiCertificate || capiCertificate->isNull()) {
 		return false;
 	}
 
-	if (!certificate->isPrivateKeyExportable()) {
-		// We assume that the Certificate Store Name/Certificate Name
-		// are valid at this point
-		m_cert_store_name = certificate->getCertStoreName();
-		m_cert_name = certificate->getCertName();
-
-		return true;
-	}
-
-	return false;
+	// We assume that the Certificate Store Name/Certificate Name
+	// are valid at this point
+	m_cert_store_name = capiCertificate->getCertStoreName();
+	m_cert_name = capiCertificate->getCertName();
+	return true;
 }
 
 //------------------------------------------------------------------------
diff --git a/Swiften/TLS/Schannel/SchannelContext.h b/Swiften/TLS/Schannel/SchannelContext.h
index 0cdb3d7..7726c41 100644
--- a/Swiften/TLS/Schannel/SchannelContext.h
+++ b/Swiften/TLS/Schannel/SchannelContext.h
@@ -37,7 +37,7 @@ namespace Swift
 		// TLSContext
 		//
 		virtual void	connect();
-		virtual bool	setClientCertificate(CertificateWithKey * cert);
+		virtual bool	setClientCertificate(CertificateWithKey::ref cert);
 
 		virtual void	handleDataFromNetwork(const SafeByteArray& data);
 		virtual void	handleDataFromApplication(const SafeByteArray& data);
diff --git a/Swiften/TLS/TLSContext.h b/Swiften/TLS/TLSContext.h
index ada813a..9dee902 100644
--- a/Swiften/TLS/TLSContext.h
+++ b/Swiften/TLS/TLSContext.h
@@ -11,10 +11,10 @@
 
 #include <Swiften/Base/SafeByteArray.h>
 #include <Swiften/TLS/Certificate.h>
+#include <Swiften/TLS/CertificateWithKey.h>
 #include <Swiften/TLS/CertificateVerificationError.h>
 
 namespace Swift {
-	class CertificateWithKey;
 
 	class TLSContext {
 		public:
@@ -22,7 +22,7 @@ namespace Swift {
 
 			virtual void connect() = 0;
 
-			virtual bool setClientCertificate(CertificateWithKey * cert) = 0;
+			virtual bool setClientCertificate(CertificateWithKey::ref cert) = 0;
 
 			virtual void handleDataFromNetwork(const SafeByteArray&) = 0;
 			virtual void handleDataFromApplication(const SafeByteArray&) = 0;