Registrars are responsible for obtaining an SSL toolkit that is compatible with the development language and platform of their client system. The minimum requirement is that it must support SSL version 3.
For C, C++ or Perl, OpenSSL is an open-source SSL solution.
For Java:
• Sun's Java Secure Socket Extension.
• SSLava from Phaos Technology. SSLava also is the toolkit used in the development of the SRS.