Mask and UnMask the Password

[kumaresan]

this Idea is to MASK a Passphrase Filed and encode / Decode a password

a. User enters a PassPhrase

b. I use Formula to Convert the "Passphrase" into a Masked Random Charter and Update in filed "maskedPassphrase"

achieved using this:
maskedPassphrase=string\upperCase(
string\concatenate(
string\substring(passphrase, 0, number\randomInt(1, 3)),
string\substring("##########", -3, number\randomInt(2, 10)),
string\substring(passphrase, -3, number\randomInt(2, 4)),
string\substring(password\generate(), -3, number\randomInt(2, 6)),"X",
string\substring("##########", -3, number\randomInt(2, 10))));

c. Convert the Passphrase to a Encoded String and Store ina Field "EncodedPassword "

Tried using this:
$EncodedPassword=password\hash(passphrase);

d. When ever requried, I want to Decode the Field "EncodedPassword " back to Filed "Passphrase"

Tried using this:
util\base64Decode($EncodedPassword));

got ERROR :

Function util\base64Encode; Bad argument type on position 1, must be string.

Request you to guide me to achieve
a. Mask a Passphrase
b. Encrypt a Password
c. Decrypt when requried

[emillod]

You'll not be able to do that. Formulas are not for this.
You can have password field which will not be visible to a user and you'll be able to use it, for example in formulas, but there is no such feature like you want to encrypt/decrypt.

It could be achieved by creating custom formula which would encrypt/decrypt based on secret in config file, but it's not available now. Base64 is not an encryption.