patched openpgpsdkfor c++ compilation, added test program, started retroshare PGPHandler component

git-svn-id: http://svn.code.sf.net/p/retroshare/code/branches/v0.5-OpenPGP@5050 b45a01b8-16f6-495d-af2f-9b41ad6348cc

libretroshare/src/pgp/pgphandler.h

@@ -0,0 +1,61 @@
+// This class implements an abstract pgp handler to be used in RetroShare.
+//
+#include <stdint.h>
+#include <string>
+#include <list>
+#include <util/rsthreads.h>
+
+extern "C" {
+#include <openpgpsdk/types.h>
+#include <openpgpsdk/keyring.h>
+}
+
+class PGPIdType
+{
+	public:
+		static const int KEY_ID_SIZE = 8 ;
+
+		PGPIdType(const std::string& hex_string) ;
+		PGPIdType(const unsigned char bytes[]) ;
+
+		std::string toStdString() const ;
+		uint64_t toUInt64() const ;
+
+	private:
+		unsigned char bytes[KEY_ID_SIZE] ;
+};
+
+class PGPHandler
+{
+	public:
+		PGPHandler(const std::string& path_to_public_keyring, const std::string& path_to_secret_keyring) ;
+
+		virtual ~PGPHandler() ;
+
+		/**
+		 * @param ids list of gpg certificate ids (note, not the actual certificates)
+		 */
+
+		bool availableGPGCertificatesWithPrivateKeys(std::list<PGPIdType>& ids);
+		bool GeneratePGPCertificate(const std::string& name, const std::string& email, const std::string& passwd, PGPIdType& pgpId, std::string& errString) ;
+
+		bool LoadCertificateFromString(const std::string& pem, PGPIdType& gpg_id, std::string& error_string);
+		std::string SaveCertificateToString(const PGPIdType& id,bool include_signatures) ;
+
+		bool TrustCertificate(const PGPIdType& id, int trustlvl);
+
+		virtual bool SignDataBin(const void *data, const uint32_t len, unsigned char *sign, unsigned int *signlen) { return false ; }
+		virtual bool VerifySignBin(const void*, uint32_t, unsigned char*, unsigned int, const std::string &withfingerprint) { return false ; }
+
+		// Debug stuff.
+		virtual bool printKeys() { return false;}
+
+	private:
+		RsMutex pgphandlerMtx ;
+
+		ops_keyring_t *_pubring ;
+		ops_keyring_t *_secring ;
+
+		const std::string _pubring_path ;
+		const std::string _secring_path ;
+};