Major plugin refactor and cleanup.

Switched to POCO library for unified platform/library interface.
Deprecated the external module API. It was creating more problems than solving.
Removed most built-in libraries in favor of system libraries for easier maintenance.
Cleaned and secured code with help from static analyzers.

vendor/POCO/NetSSL_OpenSSL/include/Poco/Net/X509Certificate.h

@@ -0,0 +1,114 @@
+//
+// X509Certificate.h
+//
+// Library: NetSSL_OpenSSL
+// Package: SSLCore
+// Module:  X509Certificate
+//
+// Definition of the X509Certificate class.
+//
+// Copyright (c) 2006-2009, Applied Informatics Software Engineering GmbH.
+// and Contributors.
+//
+// SPDX-License-Identifier:	BSL-1.0
+//
+
+
+#ifndef NetSSL_X509Certificate_INCLUDED
+#define NetSSL_X509Certificate_INCLUDED
+
+
+#include "Poco/Net/NetSSL.h"
+#include "Poco/Net/SocketDefs.h"
+#include "Poco/Crypto/X509Certificate.h"
+#include "Poco/DateTime.h"
+#include "Poco/SharedPtr.h"
+#include <set>
+
+
+namespace Poco {
+namespace Net {
+
+
+class HostEntry;
+
+
+class NetSSL_API X509Certificate: public Poco::Crypto::X509Certificate
+	/// This class extends Poco::Crypto::X509Certificate with the
+	/// feature to validate a certificate.
+{
+public:
+	explicit X509Certificate(std::istream& istr);
+		/// Creates the X509Certificate object by reading
+		/// a certificate in PEM format from a stream.
+
+	explicit X509Certificate(const std::string& path);
+		/// Creates the X509Certificate object by reading
+		/// a certificate in PEM format from a file.
+
+	explicit X509Certificate(X509* pCert);
+		/// Creates the X509Certificate from an existing
+		/// OpenSSL certificate. Ownership is taken of 
+		/// the certificate.
+
+	X509Certificate(X509* pCert, bool shared);
+		/// Creates the X509Certificate from an existing
+		/// OpenSSL certificate. Ownership is taken of 
+		/// the certificate. If shared is true, the 
+		/// certificate's reference count is incremented.
+
+	X509Certificate(const Poco::Crypto::X509Certificate& cert);
+		/// Creates the certificate by copying another one.
+
+	X509Certificate(const X509Certificate& cert);
+		/// Creates the certificate by copying another one.
+
+	X509Certificate(X509Certificate&& cert) noexcept;
+		/// Creates the certificate by moving another one.
+
+	X509Certificate& operator = (const Poco::Crypto::X509Certificate& cert);
+		/// Assigns a certificate.
+
+	X509Certificate& operator = (const X509Certificate& cert);
+		/// Assigns a certificate.
+
+	X509Certificate& operator = (X509Certificate&& cert) noexcept;
+		/// Moves a certificate.
+
+	~X509Certificate();
+		/// Destroys the X509Certificate.
+
+	bool verify(const std::string& hostName) const;
+		/// Verifies the validity of the certificate against the host name.
+		///
+		/// For this check to be successful, the certificate must contain
+		/// a domain name that matches the domain name
+		/// of the host.
+		/// 
+		/// Returns true if verification succeeded, or false otherwise.
+		
+	static bool verify(const Poco::Crypto::X509Certificate& cert, const std::string& hostName);
+		/// Verifies the validity of the certificate against the host name.
+		///
+		/// For this check to be successful, the certificate must contain
+		/// a domain name that matches the domain name
+		/// of the host.
+		///
+		/// Returns true if verification succeeded, or false otherwise.
+		
+protected:
+	static bool containsWildcards(const std::string& commonName);
+	static bool matchWildcard(const std::string& alias, const std::string& hostName);
+	
+private:
+	enum
+	{
+		NAME_BUFFER_SIZE = 256
+	};
+};
+
+
+} } // namespace Poco::Net
+
+
+#endif // NetSSL_X509Certificate_INCLUDED