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 <INPUT>.b64 -out <OUTPUT>.txt`
MD5	Checksum	`openssl md5 <INPUT>`	Same as `md5sum <INPUT>`
SHA1	Checksum	`openssl sha1 <INPUT>`	Same as `sha1sum <INPUT>`
SHA224	Checksum	`openssl sha224 <INPUT>`	Same as `sha224sum <INPUT>`
SHA256	Checksum	`openssl sha256 <INPUT>`	Same as `sha256sum <INPUT>`
SHA384	Checksum	`openssl sha384 <INPUT>`	Same as `sha384sum <INPUT>`
SHA512	Checksum	`openssl sha512 <INPUT>`	Same as `sha512sum <INPUT>`

Checksum a file

openssl md5 file

Checksum a file

openssl sha1 file

Crypt

openssl passwd <Password>

MD5 (for /etc/passwd and /etc/shadow)

openssl passwd -1 <Password>

Note: 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: