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DataToSign

cggmp24::signing

Struct DataToSign 

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pub struct DataToSign<E: Curve>(/* private fields */);
Expand description

A message digest that is guaranteed to have a known preimage, making it safe for signing.

This struct wraps a scalar value (Scalar<E>) that represents the cryptographic hash of a message. It is the primary and recommended type for all signing operations in this library.

§Purpose and Safety

The key security feature of DataToSign is its construction method. An instance of this struct can only be created by providing the original message bytes to the library’s API. The library then performs the hashing internally.

This design acts as a type-safe guard, ensuring that the system will only ever sign a hash for which the original message (the “preimage”) is known and has been processed by the library. This prevents a critical class of signature forgery attacks where an attacker provides a raw, maliciously crafted hash (refer to PrehashedDataToSign docs to learn more about this attack).

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impl<E: Curve> DataToSign<E>

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pub fn digest<D: Digest>(data: &[u8]) -> Self

Construct a DataToSign by hashing data with algorithm D

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pub fn from_digest<D: Digest>(hash: D) -> Self

Constructs a DataToSign from output of given digest

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pub fn to_scalar(self) -> Scalar<E>

Returns a scalar that represents a data to be signed

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impl<E: Curve> AnyDataToSign<E> for DataToSign<E>

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fn to_scalar(&self) -> Scalar<E>

Returns a scalar that represents a data to be signed
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impl<E: Clone + Curve> Clone for DataToSign<E>

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fn clone(&self) -> DataToSign<E>

Returns a duplicate of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl<E: Debug + Curve> Debug for DataToSign<E>

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

Formats the value using the given formatter. Read more
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impl<E: Copy + Curve> Copy for DataToSign<E>

Auto Trait Implementations§

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impl<E> Freeze for DataToSign<E>
where <E as Curve>::Scalar: Freeze,

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impl<E> RefUnwindSafe for DataToSign<E>
where <E as Curve>::Scalar: RefUnwindSafe,

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impl<E> Send for DataToSign<E>

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impl<E> Sync for DataToSign<E>

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impl<E> Unpin for DataToSign<E>

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impl<E> UnsafeUnpin for DataToSign<E>
where <E as Curve>::Scalar: UnsafeUnpin,

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impl<E> UnwindSafe for DataToSign<E>
where <E as Curve>::Scalar: UnwindSafe,

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

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Az for T

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fn az<Dst>(self) -> Dst
where T: Cast<Dst>,

Casts the value.
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where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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where T: ?Sized,

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

Mutably borrows from an owned value. Read more
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impl<Src, Dst> CastFrom<Src> for Dst
where Src: Cast<Dst>,

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fn cast_from(src: Src) -> Dst

Casts the value.
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fn checked_as<Dst>(self) -> Option<Dst>
where T: CheckedCast<Dst>,

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where Src: CheckedCast<Dst>,

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fn checked_cast_from(src: Src) -> Option<Dst>

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where T: Clone,

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

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dest. Read more
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fn fmt_binary(self) -> FmtBinary<Self>
where Self: Binary,

Causes self to use its Binary implementation when Debug-formatted.
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where Self: Display,

Causes self to use its Display implementation when Debug-formatted.
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fn fmt_lower_exp(self) -> FmtLowerExp<Self>
where Self: LowerExp,

Causes self to use its LowerExp implementation when Debug-formatted.
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fn fmt_lower_hex(self) -> FmtLowerHex<Self>
where Self: LowerHex,

Causes self to use its LowerHex implementation when Debug-formatted.
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fn fmt_upper_exp(self) -> FmtUpperExp<Self>
where Self: UpperExp,

Causes self to use its UpperExp implementation when Debug-formatted.
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where Self: UpperHex,

Causes self to use its UpperHex implementation when Debug-formatted.
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fn fmt_list(self) -> FmtList<Self>
where &'a Self: for<'a> IntoIterator,

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Casts the value.
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Pipes by value. This is generally the method you want to use. Read more
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Borrows self and passes that borrow into the pipe function. Read more
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type Output = T

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fn tap(self, func: impl FnOnce(&Self)) -> Self

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fn tap_mut(self, func: impl FnOnce(&mut Self)) -> Self

Mutable access to a value. Read more
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