      openssl command [ command_opts ] [ command_args ]

       openssl [ list-standard-commands | list-message-digest-commands | list-
       cipher-commands | list-cipher-algorithms | list-message-digest-
       algorithms | list-public-key-algorithms]

       openssl no-XXX [ arbitrary options ]

       dgst      Message Digest Calculation.

      dhparam   Generation and Management of Diffie-Hellman Parameters.
                 Superseded by genpkey and pkeyparam

       genpkey   Generation of Private Key or Parameters.

      passwd    Generation of hashed passwords.

       rand      Generate pseudo-random bytes.
       x509      X.509 Certificate Data Management.

   MESSAGE DIGEST COMMANDS
       md2       MD2 Digest
       md5       MD5 Digest
       mdc2      MDC2 Digest
       rmd160    RMD-160 Digest
       sha       SHA Digest
       sha1      SHA-1 Digest
       sha224    SHA-224 Digest
       sha256    SHA-256 Digest
       sha384    SHA-384 Digest
       sha512    SHA-512 Digest
   ENCODING AND CIPHER COMMANDS
       base64    Base64 Encoding
       bf bf-cbc bf-cfb bf-ecb bf-ofb
                 Blowfish Cipher
       cast cast-cbc
                 CAST Cipher

       cast5-cbc cast5-cfb cast5-ecb cast5-ofb
                 CAST5 Cipher

       des des-cbc des-cfb des-ecb des-ede des-ede-cbc des-ede-cfb des-ede-ofb
       des-ofb
                 DES Cipher

       des3 desx des-ede3 des-ede3-cbc des-ede3-cfb des-ede3-ofb
                 Triple-DES Cipher

       idea idea-cbc idea-cfb idea-ecb idea-ofb
                 IDEA Cipher

       rc2 rc2-cbc rc2-cfb rc2-ecb rc2-ofb
                 RC2 Cipher

       rc4       RC4 Cipher

       rc5 rc5-cbc rc5-cfb rc5-ecb rc5-ofb
                 RC5 Cipher
