Function create_passcode_key 

pub fn create_passcode_key(
    passcode: &[u8],
    salt: &[u8],
    params: &PasscodeKdf,
) -> Result<AuthKey>

Derives the key of one passcode wrap (CreatePasscodeKey).

Errors

• Error::KeyDataInvalid for an empty passcode, a salt shorter than kdf::PASSCODE_SALT_MIN_SIZE, or parameters that are above the caps or not PasscodeKdf::valid.
• Error::BadDecryptKey when the derivation itself fails, which Telegram Desktop reports as a wrong passcode.