Chilkat is a cross-language, cross-platform API providing 90+ classes for many Internet protocols, formats, and algorithms.
Some classes need a license: SSH, SFTP, FTP2, HTTP, REST, Socket/TLS, IMAP, ...
Some are free: JSON, XML, Cert, PrivateKey, ...

VCL Component with extensive configurability for integrating Google Maps in Delphi & C++Builder.

Different map modes: default road map, satellite view, hybrid view, StreetView, terrain
Extra map information: Bicycle View, Panoramio (pictures of interest) information, Traffic information
Get & show directions on the map (Delphi XE or newer Delphi releases only)
Position markers, including default Google balloon markers and custom image markers.
Moving over a marker can display a hint with the marker title information

Mandatory are file to be signed (To be signed)
and the two keys: publicKey and private key,
you can easy generate public key from private key
using "From PrivKey" button of PublicKey section,
there is no way in hell you can get private key from public key,
RSA 1024 is commonly used and sometimes (not often) even RSA 2048.
Rest of informations are optional and will be filled with some default values.