openssl 1.0.1-4ubuntu5.5 (amd64 binary) in ubuntu precise

 This package contains the openssl binary and related tools.
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 It is part of the OpenSSL implementation of SSL.
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 You need it to perform certain cryptographic actions like:
  - Creation of RSA, DH and DSA key parameters;
  - Creation of X.509 certificates, CSRs and CRLs;
  - Calculation of message digests;
  - Encryption and decryption with ciphers;
  - SSL/TLS client and server tests;
  - Handling of S/MIME signed or encrypted mail.