I was recently looking for a way of encrypting files with a salted encryption algruthum, and found this can be done using OpenSSL. It’s really easy and much more secure that using a zip product.
You do this by using the following syntax:
openssl des3 -salt -in /path/FileToBeEncrypted -out /path/EncryptedFileName
openssl enc -aes-256-cbc -md sha512 -pbkdf2 -salt -in ~/test.txt -out ~/test.txt.enc
The salt is equivlent to a password, you will need this to decrypt the file in the future.
To decrypt the file you need to add the -d switch]
openssl enc -aes-256-cbc -md sha512 -pbkdf2 -d -salt -in ~/test.txt.enc -out ~/test.txt
I recently had to do use the OpenSSL decryption process in a script, and needed a way to pass the salt password without being prompted.
My solution was to use the -pass switch and standard input.
echo <My Salt Password> | openssl enc -aes-256-cbc -md sha512 -pbkdf2 -salt -in ~/test.txt -out ~/test.txt.enc -pass stdin