You can buy this project and download/modify it how often you want.
Authentication OTP Type Time Based Counter Based totp is Time-Based One Time Password. 'hotp' is a counter base one time password in which the server keeps a counter to hash against. OTP Hash Algorithm SHA1 SHA256 SHA512 What hashing algorithm should be used to generate the OTP. Number of Digits How many digits should the OTP have? Look ahead window How far ahead should the server look just in case the token generator and server are out of time sync or counter sync? Initial Counter What should the initial counter value be? OTP Token Period How many seconds should an OTP token be valid? Defaults to 30 seconds. Save Cancel