Encrypt file:

<code>
$ openssl aes-256-cbc -salt -in file-test -out file-test.aes
enter aes-256-cbc encryption password:
Verifying - enter aes-256-cbc encryption password:
</code>

Decrypt file:

<code>
$ openssl aes-256-cbc -d -in file-test.aes -out file-test-dec
</code>

Encrypt file and convert it to Base64:

<code>
$ openssl aes-256-cbc -a -salt -in file-test -out file-test-64
</code>

And this way to decrypt it:

<code>
$ openssl aes-256-cbc -d -a -in file-test-64 -out file-64.dec
</code>

Append password onto the encrypt command:

<code>
$ openssl aes-256-cbc -a -salt -in file-test -out file-test-64 -k password
</code>

Encrypt one-liner with password from a file:

<code>
$ for f in * ; do [ -f $f ] && openssl aes-256-cbc -salt -in $f -out $f.enc -pass file:password.txt ; done
</code>

Encrypt one-liner with password in commandline:

<code>
$ password="password123";for f in * ; do [ -f $f ] && openssl aes-256-cbc -salt -in $f -out $f.enc -k $password ; done
</code>

Hashes:

<code>
$ openssl sha1 file-test-64
SHA1(eapol-64)= afc594f26ca0878073769d24f8c04fe35f2bf8b3
</code>

Hash of files in current directory:

<code>
$ ls * | xargs openssl sha1
</code>

Replace "sha1" with "md5" if you need the md5 hash instead.


----
Source: http://olex.openlogic.com/wazi/2011/more-slick-openssl-tricks/