TOTP class

Time-based One-Time Password (RFC 6238).

Constructors

TOTP({required String secret, int digits = 6, OTPAlgorithm algorithm = OTPAlgorithm.sha1, int period = 30})

Creates a TOTP instance from a Base32-encoded secret.

TOTP.fromBytes({required Uint8List secret, int digits = 6, OTPAlgorithm algorithm = OTPAlgorithm.sha1, int period = 30})

Creates a TOTP instance from raw secret bytes.

Properties

algorithm → OTPAlgorithm

Hash algorithm used.

no setter

digits → int

Number of digits in the generated code.

no setter

hashCode → int

The hash code for this object.

no setter, inherited

period → int

Time step in seconds (default: 30).

final

remaining → int

Seconds remaining until the current code expires.

no setter

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

at(DateTime time) → String

Generates the OTP code for the given time.

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

now() → String

Generates the current OTP code.

toString() → String

A string representation of this object.

inherited

verify(String code, {DateTime? time, int window = 1}) → bool

Verifies the code against the given time (or now).

Operators

operator ==(Object other) → bool

The equality operator.

inherited

Static Methods

format(String code) → String

Formats a code with a space in the middle for readability.