Provides Time-based One-Time Password (TOTP) generating procedures. TOTP is defined in RFC 6238: RFC 6238.
K must be a bytevector represents shared secret.
digit must be a positive exact integer.
The keyword argument time is given, then it must be a UTC time object
of SRFI-19. The procedure computes returning one-time password according to
the given time. The default value is (current-time).
NOTE: time keyword should not be specified unless its testing purpose.
The keyword arguments described below are system parameters, means these parameters must be agreed between authenticator.
The keyword argument start-time is given, then it must be a UTC time
object of SRFI-19. The procedure computes returning one-time password according
to the given time. The defaule value is (make-time time-utc 0 0).
The keyword argument step is given, then it must be a positive exact
integer. The procedure computes returning one-time password according
to the given time. The defaule value is 30.
The keyword argument step is given, then it must be a positive exact
integer. The procedure computes returning one-time password according
to the given time. The defaule value is 30.
The keyword argument mode is given, then it must be a hash algorithm name
either builtin or custom. The procedure computes returning one-time password
according to the given time. The defaule value is SHA-1.
Generates an Time-based one-time password.
totp is an alias of generate-time-based-one-time-password.