OpenSSL/Cheatsheet

Command line shortcuts

Type	Action	Command	Comment
Base64	Encode	`openssl base64 -in <INPUT>.txt -out <OUTPUT>.b64`
Base64	Decode	`openssl base64 -d -in <File>.b64 -out <File>.txt`
MD5	Checksum	`openssl md5 <File>`	Same as `md5sum <File>`
SHA1	Checksum	`openssl sha1 <File>`	Same as `sha1sum <File>`
SHA224	Checksum	`openssl sha224 <File>`	Same as `sha224sum <File>`
SHA256	Checksum	`openssl sha256 <File>`	Same as `sha256sum <File>`
SHA384	Checksum	`openssl sha384 <File>`	Same as `sha384sum <File>`
SHA512	Checksum	`openssl sha512 <File>`	Same as `sha512sum <File>`
Password	Encrypt	`openssl passwd <Password>`	Creates a crypt-ed password for use with `/etc/shadow` [1]
Password	Encrypt	`openssl passwd -1 <Password>`	Creates a md5 password for use with `/etc/shadow` [1]

Newer versions of Debian use the sha-512 there is a tool called mkpasswd that will create compatible passwords.

Encrypt

openssl enc -aes-256-cbc < <File> > <File>.aes
enter aes-256-cbc encryption password:
Verifying - enter aes-256-cbc encryption password:

Decrypt

openssl enc -d -aes-256-cbc -in <File>.aes > <File> 
enter aes-256-cbc decryption password: