OpenSSL

• About
• Encrypt and decrypt a string

About

OpenSSL is a software toolkit for general-purpose cryptography, in implements cryptographic functions and provides various utility functions.

Encrypt and decrypt a string

We will use AES-256 (Advanced Encryption Standard with 256 bits block size) encryption in CBC (Cipher Block Chaining) mode.

Encryption:

echo "Message" | openssl aes-256-cbc -base64 -pass pass:password

U2FsdGVkX19HwyPahBZvi2pDMQ1cR9nDYGvriqUo1UM=

Decryption:

echo "U2FsdGVkX19HwyPahBZvi2pDMQ1cR9nDYGvriqUo1UM=" | openssl aes-256-cbc -d -base64 -pass pass:password

Message

Used openssl options:

• -base64: Perform Base64 encoding / decoding.
• -pass: Passphrase, pass:<value> for plain text.
• -d: Decrypt the input data.