OpenSSL Overview
From OpenSSLWiki
OpenSsl is used in many places but not always for same purpose and not always fully.
With OpenSsl You can:
- Use openssl as a command line tool to create/handle certificates related files.
- Develop programs needing cryptographic functions, then use openssl library libcrypto.
- Develop programs needing SSL/TLS communication, then use openssl library libssl.
- Extend openssl to cover new cryptographic methods or new security protocols.