[34][00:25:02] vlazarenko@alluminium (~/tests) > echo -ne "\[email protected]\0mypass" | base64
AG15dXNlckBteWhvc3QuY29tAG15cGFzcw==
[35][00:25:22] vlazarenko@alluminium (~/tests) > bash base64.sh
AG15dXNlckBteWhvc3QuY29tAG15cGFzcw==
[36][00:25:25] vlazarenko@alluminium (~/tests) > cat base64.sh
#!/bin/bash
user=myuser
pass=mypass
host=myhost.com

auth=$(echo -ne "\0$user@$host\0$pass" | base64);

echo $auth