Struct HotpConfig

Source

pub struct HotpConfig {
    pub secret: ZeroizedString,
    pub digits: u8,
    pub algorithm: OtpAlgorithm,
    pub counter: u64,
    pub lookahead_window: u32,
    pub attempt_count: u8,
    pub max_attempts: u8,
}

Expand description

HOTP factor configuration (RFC 4226).

Fields§

§secret: ZeroizedString

Shared secret (raw bytes, base32-encoded for provisioning URIs). Zeroized on drop.

§digits: u8

Number of digits in the generated code (typically 6).

§algorithm: OtpAlgorithm

HMAC algorithm used for code derivation.

§counter: u64

Server-side counter; advances on every successful verification.

§lookahead_window: u32

Number of future counter values accepted to handle hardware-token drift.

§attempt_count: u8

Number of failed verification attempts made against the current counter window. Incremented on each failed verify; reset to 0 on successful verify. When attempt_count >= max_attempts, the counter is advanced past the lookahead window so the current set of codes can never be presented again, and the user must re-sync from a fresh hardware-token press.

Required by RFC 4226 §7.4 (“the server MUST set a throttling parameter T”). Without this counter, an attacker has unlimited guesses against the lookahead window.

§max_attempts: u8

Maximum failed attempts before the counter is burned. RFC 4226 §7.4 RECOMMENDS T ≤ 10. Default: 5. Set to 0 to disable (not recommended).

HotpConfig

Struct HotpConfig Copy item path

Fields§

Trait Implementations§

impl Clone for HotpConfig

fn clone(&self) -> HotpConfig

fn clone_from(&mut self, source: &Self)

impl Debug for HotpConfig

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

impl Default for HotpConfig

fn default() -> HotpConfig

impl<'de> Deserialize<'de> for HotpConfig

fn deserialize<__D>( __deserializer: __D, ) -> Result<HotpConfig, <__D as Deserializer<'de>>::Error>where __D: Deserializer<'de>,

impl Serialize for HotpConfig

fn serialize<__S>( &self, __serializer: __S, ) -> Result<<__S as Serializer>::Ok, <__S as Serializer>::Error>where __S: Serializer,

Auto Trait Implementations§

impl Freeze for HotpConfig

impl RefUnwindSafe for HotpConfig

impl Send for HotpConfig

impl Sync for HotpConfig

impl Unpin for HotpConfig

impl UnsafeUnpin for HotpConfig

impl UnwindSafe for HotpConfig

Blanket Implementations§

impl<T> Any for Twhere T: 'static + ?Sized,

fn type_id(&self) -> TypeId

impl<T> ArchivePointee for T

type ArchivedMetadata = ()

fn pointer_metadata( _: &<T as ArchivePointee>::ArchivedMetadata, ) -> <T as Pointee>::Metadata

impl<'a, T, E> AsTaggedExplicit<'a, E> for Twhere T: 'a,

fn explicit(self, class: Class, tag: u32) -> TaggedParser<'a, Explicit, Self, E>

impl<'a, T, E> AsTaggedExplicit<'a, E> for Twhere T: 'a,

fn explicit(self, class: Class, tag: u32) -> TaggedParser<'a, Explicit, Self, E>

impl<'a, T, E> AsTaggedImplicit<'a, E> for Twhere T: 'a,

fn implicit( self, class: Class, constructed: bool, tag: u32, ) -> TaggedParser<'a, Implicit, Self, E>

impl<'a, T, E> AsTaggedImplicit<'a, E> for Twhere T: 'a,

fn implicit( self, class: Class, constructed: bool, tag: u32, ) -> TaggedParser<'a, Implicit, Self, E>

impl<T> Borrow<T> for Twhere T: ?Sized,

fn borrow(&self) -> &T

impl<T> BorrowMut<T> for Twhere T: ?Sized,

fn borrow_mut(&mut self) -> &mut T

impl<T> CloneToUninit for Twhere T: Clone,

unsafe fn clone_to_uninit(&self, dest: *mut u8)

impl<T> DynClone for Twhere T: Clone,

fn __clone_box(&self, _: Private) -> *mut ()

impl<T> From<T> for T

fn from(t: T) -> T

impl<T> FromRef<T> for Twhere T: Clone,

fn from_ref(input: &T) -> T

impl<T> Instrument for T

fn instrument(self, span: Span) -> Instrumented<Self>

fn in_current_span(self) -> Instrumented<Self>

impl<T, U> Into<U> for Twhere U: From<T>,

fn into(self) -> U

impl<T> IntoEither for T

fn into_either(self, into_left: bool) -> Either<Self, Self>

fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>where F: FnOnce(&Self) -> bool,

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impl<T, N1, N2> Niching<NichedOption<T, N1>> for N2where T: SharedNiching<N1, N2>, N1: Niching<T>, N2: Niching<T>,

unsafe fn is_niched(niched: *const NichedOption<T, N1>) -> bool

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const ALIGN: usize

type Init = T

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impl<T> Pointee for T

type Metadata = ()

impl<T> PolicyExt for Twhere T: ?Sized,

fn and<P, B, E>(self, other: P) -> And<T, P>where T: Policy<B, E>, P: Policy<B, E>,

fn or<P, B, E>(self, other: P) -> Or<T, P>where T: Policy<B, E>, P: Policy<B, E>,

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type Output = T

impl<T> ToOwned for Twhere T: Clone,

type Owned = T

fn to_owned(&self) -> T

fn clone_into(&self, target: &mut T)

Struct HotpConfig

fn deserialize<D>( deserializer: D, ) -> Result<HotpConfig, <D as Deserializer<'de>>::Error>
where __D: Deserializer<'de>,

fn serialize<S>( &self, serializer: S, ) -> Result<<S as Serializer>::Ok, <S as Serializer>::Error>
where S: Serializer,

impl<T> Any for T
where T: 'static + ?Sized,

impl<'a, T, E> AsTaggedExplicit<'a, E> for T
where T: 'a,

impl<'a, T, E> AsTaggedExplicit<'a, E> for T
where T: 'a,

impl<'a, T, E> AsTaggedImplicit<'a, E> for T
where T: 'a,

impl<'a, T, E> AsTaggedImplicit<'a, E> for T
where T: 'a,

impl<T> Borrow<T> for T
where T: ?Sized,

impl<T> BorrowMut<T> for T
where T: ?Sized,

impl<T> CloneToUninit for T
where T: Clone,

impl<T> DynClone for T
where T: Clone,

impl<T> FromRef<T> for T
where T: Clone,

impl<T, U> Into<U> for T
where U: From<T>,

fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
where F: FnOnce(&Self) -> bool,

impl<T, N1, N2> Niching<NichedOption<T, N1>> for N2
where T: SharedNiching<N1, N2>, N1: Niching<T>, N2: Niching<T>,

impl<T> PolicyExt for T
where T: ?Sized,

fn and<P, B, E>(self, other: P) -> And<T, P>
where T: Policy<B, E>, P: Policy<B, E>,

fn or<P, B, E>(self, other: P) -> Or<T, P>
where T: Policy<B, E>, P: Policy<B, E>,

impl<T> ToOwned for T
where T: Clone,

impl<T, U> TryFrom<U> for T
where U: Into<T>,

impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

impl<V, T> VZip<V> for T
where V: MultiLane<T>,

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where S: Into<Dispatch>,

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where T: for<'de> Deserialize<'de>,