Encrypt/Decrypt Files Using OpenSSL

crypt.sh

# encrypt
openssl enc -in test.txt -aes-256-cbc -pass pass:mypass -out test.txt.enc

# decrypt
openssl enc -in test.txt.enc -d -aes-256-cbc -pass pass:mypass -out test.txt

# valid password sources (as of OpenSSL 1.1.1, see 'man openssl' for more recent info):
# -pass pass:mypass
# -pass env:somevar
# -pass file:somepathname
# -pass fd:number
# -pass stdin