credentials_tls: Keep thumbprint rather than client certificate

By storing the client certificate the certificate became detached from
its private key stored in user certificate store. This rendered client
certificates useless for client TLS authentication.

Now, the client certificate thumbprint is stored instead. The client
certificate is looked up in the user certificate store as required.

This breaks profile XML and BLOB backward compatibility. Since the
client certificate support was broken, nobody probably used those in
the settings before.

Signed-off-by: Simon Rozman <simon@rozman.si>

lib/TLS_UI/include/TLS_UI.h

@@ -36,6 +36,7 @@
 #include <string>
 
 class wxCertificateClientData;
+class wxCertificateHashClientData;
 class wxTLSCredentialsPanel;
 class wxTLSServerTrustPanel;
 class wxTLSConfigPanel;
@@ -93,6 +94,16 @@ public:
 };
 
 
+///
+/// Helper class for auto-destroyable certificate hashes used in wxWidget's item containers
+///
+class wxCertificateHashClientData : public wxClientData
+{
+public:
+    std::vector<unsigned char> m_cert_hash; ///< Certificate thumbprint
+};
+
+
 ///
 /// TLS credential panel
 ///