Struct ecdsa::Signature[−][src]

pub struct Signature<C: Curve + Order> where
    SignatureSize<C>: ArrayLength<u8>,  { /* fields omitted */ }
Expand description

ECDSA signature (fixed-size). Generic over elliptic curve types.

Serialized as fixed-sized big endian scalar values with no added framing:

  • r: field element size for the given curve, big-endian
  • s: field element size for the given curve, big-endian

For example, in a curve with a 256-bit modulus like NIST P-256 or secp256k1, r and s will both be 32-bytes, resulting in a signature with a total of 64-bytes.

ASN.1 DER-encoded signatures also supported via the Signature::from_der and Signature::to_der methods.

Implementations

impl<C> Signature<C> where
    C: Curve + Order,
    SignatureSize<C>: ArrayLength<u8>, [src]

pub fn from_scalars(
    r: impl Into<FieldBytes<C>>,
    s: impl Into<FieldBytes<C>>
) -> Result<Self, Error>[src]

Create a Signature from the serialized r and s scalar values which comprise the signature.

pub fn from_der(bytes: &[u8]) -> Result<Self, Error> where
    C::FieldSize: Add + ArrayLength<u8> + NonZero,
    MaxSize<C>: ArrayLength<u8>,
    <C::FieldSize as Add>::Output: Add<MaxOverhead> + ArrayLength<u8>, [src]

This is supported on crate feature der only.

Parse a signature from ASN.1 DER

pub fn to_der(&self) -> Signature<C> where
    C::FieldSize: Add + ArrayLength<u8> + NonZero,
    MaxSize<C>: ArrayLength<u8>,
    <C::FieldSize as Add>::Output: Add<MaxOverhead> + ArrayLength<u8>, [src]

This is supported on crate feature der only.

Serialize this signature as ASN.1 DER

impl<C> Signature<C> where
    C: Curve + Order + ProjectiveArithmetic,
    Scalar<C>: PrimeField<Repr = FieldBytes<C>>,
    <Scalar<C> as PrimeField>::Repr: From<Scalar<C>> + for<'a> From<&'a Scalar<C>>,
    SignatureSize<C>: ArrayLength<u8>, [src]

pub fn r(&self) -> NonZeroScalar<C>[src]

This is supported on crate feature arithmetic only.

Get the r component of this signature

pub fn s(&self) -> NonZeroScalar<C>[src]

This is supported on crate feature arithmetic only.

Get the s component of this signature

pub fn normalize_s(&mut self) -> Result<bool, Error> where
    Scalar<C>: NormalizeLow, [src]

This is supported on crate feature arithmetic only.

Normalize signature into “low S” form as described in BIP 0062: Dealing with Malleability.

Trait Implementations

impl<C> AsRef<[u8]> for Signature<C> where
    C: Curve + Order,
    SignatureSize<C>: ArrayLength<u8>, [src]

fn as_ref(&self) -> &[u8][src]

Performs the conversion.

impl<C: Clone + Curve + Order> Clone for Signature<C> where
    SignatureSize<C>: ArrayLength<u8>, [src]

fn clone(&self) -> Signature<C>[src]

Returns a copy of the value. Read more

fn clone_from(&mut self, source: &Self)1.0.0[src]

Performs copy-assignment from source. Read more

impl<C> Debug for Signature<C> where
    C: Curve + Order,
    SignatureSize<C>: ArrayLength<u8>, [src]

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

Formats the value using the given formatter. Read more

impl<C, D> DigestSigner<D, Signature<C>> for SigningKey<C> where
    C: Curve + Order + ProjectiveArithmetic,
    D: FixedOutput<OutputSize = C::FieldSize> + BlockInput + Clone + Default + Reset + Update,
    Scalar<C>: PrimeField<Repr = FieldBytes<C>> + FromDigest<C> + Invert<Output = Scalar<C>> + SignPrimitive<C> + Zeroize,
    SignatureSize<C>: ArrayLength<u8>, [src]

fn try_sign_digest(&self, digest: D) -> Result<Signature<C>, Error>[src]

Sign message prehash using a deterministic ephemeral scalar (k) computed using the algorithm described in RFC 6979 (Section 3.2): https://tools.ietf.org/html/rfc6979#section-3

fn sign_digest(&self, digest: D) -> S[src]

Sign the given prehashed message [Digest], returning a signature. Read more

impl<C, D> DigestVerifier<D, Signature<C>> for VerifyingKey<C> where
    C: Curve + Order + ProjectiveArithmetic,
    D: Digest<OutputSize = C::FieldSize>,
    AffinePoint<C>: Copy + Clone + Debug + VerifyPrimitive<C>,
    ProjectivePoint<C>: From<AffinePoint<C>>,
    Scalar<C>: PrimeField<Repr = FieldBytes<C>> + FromDigest<C>,
    SignatureSize<C>: ArrayLength<u8>, [src]

fn verify_digest(
    &self,
    digest: D,
    signature: &Signature<C>
) -> Result<(), Error>[src]

Verify the signature against the given [Digest] output.

impl<C: PartialEq + Curve + Order> PartialEq<Signature<C>> for Signature<C> where
    SignatureSize<C>: ArrayLength<u8>, [src]

fn eq(&self, other: &Signature<C>) -> bool[src]

This method tests for self and other values to be equal, and is used by ==. Read more

fn ne(&self, other: &Signature<C>) -> bool[src]

This method tests for !=.

impl<C> PrehashSignature for Signature<C> where
    C: DigestPrimitive,
    <C::FieldSize as Add>::Output: ArrayLength<u8>, [src]

This is supported on crate feature hazmat only.

type Digest = C::Digest

Preferred Digest algorithm to use when computing this signature type.

impl<C, D> RandomizedDigestSigner<D, Signature<C>> for SigningKey<C> where
    C: Curve + Order + ProjectiveArithmetic,
    D: FixedOutput<OutputSize = C::FieldSize> + BlockInput + Clone + Default + Reset + Update,
    Scalar<C>: PrimeField<Repr = FieldBytes<C>> + FromDigest<C> + Invert<Output = Scalar<C>> + SignPrimitive<C> + Zeroize,
    SignatureSize<C>: ArrayLength<u8>, [src]

fn try_sign_digest_with_rng(
    &self,
    rng: impl CryptoRng + RngCore,
    digest: D
) -> Result<Signature<C>, Error>[src]

Sign message prehash using an ephemeral scalar (k) derived according to a variant of RFC 6979 (Section 3.6) which supplies additional entropy from an RNG.

fn sign_digest_with_rng(&self, rng: impl CryptoRng + RngCore, digest: D) -> S[src]

Sign the given prehashed message Digest, returning a signature. Read more

impl<C> RandomizedSigner<Signature<C>> for SigningKey<C> where
    Self: RandomizedDigestSigner<C::Digest, Signature<C>>,
    C: Curve + Order + ProjectiveArithmetic + DigestPrimitive,
    Scalar<C>: PrimeField<Repr = FieldBytes<C>> + FromDigest<C> + Invert<Output = Scalar<C>> + SignPrimitive<C> + Zeroize,
    SignatureSize<C>: ArrayLength<u8>, [src]

fn try_sign_with_rng(
    &self,
    rng: impl CryptoRng + RngCore,
    msg: &[u8]
) -> Result<Signature<C>, Error>[src]

Attempt to sign the given message, returning a digital signature on success, or an error if something went wrong. Read more

fn sign_with_rng(&self, rng: impl CryptoRng + RngCore, msg: &[u8]) -> S[src]

Sign the given message and return a digital signature

impl<C> Signature for Signature<C> where
    C: Curve + Order,
    SignatureSize<C>: ArrayLength<u8>, [src]

fn from_bytes(bytes: &[u8]) -> Result<Self, Error>[src]

Parse a signature from its byte representation

fn as_bytes(&self) -> &[u8][src]

Borrow a byte slice representing the serialized form of this signature

impl<C> Signer<Signature<C>> for SigningKey<C> where
    Self: DigestSigner<C::Digest, Signature<C>>,
    C: Curve + Order + ProjectiveArithmetic + DigestPrimitive,
    Scalar<C>: PrimeField<Repr = FieldBytes<C>> + FromDigest<C> + Invert<Output = Scalar<C>> + SignPrimitive<C> + Zeroize,
    SignatureSize<C>: ArrayLength<u8>, [src]

fn try_sign(&self, msg: &[u8]) -> Result<Signature<C>, Error>[src]

Attempt to sign the given message, returning a digital signature on success, or an error if something went wrong. Read more

fn sign(&self, msg: &[u8]) -> S[src]

Sign the given message and return a digital signature

impl<C> TryFrom<&'_ [u8]> for Signature<C> where
    C: Curve + Order,
    SignatureSize<C>: ArrayLength<u8>, [src]

type Error = Error

The type returned in the event of a conversion error.

fn try_from(bytes: &[u8]) -> Result<Self, Error>[src]

Performs the conversion.

impl<C> TryFrom<Signature<C>> for Signature<C> where
    C: Curve + Order,
    C::FieldSize: Add + ArrayLength<u8> + NonZero,
    MaxSize<C>: ArrayLength<u8>,
    <C::FieldSize as Add>::Output: Add<MaxOverhead> + ArrayLength<u8>, [src]

This is supported on crate feature der only.

type Error = Error

The type returned in the event of a conversion error.

fn try_from(doc: Signature<C>) -> Result<Signature<C>, Error>[src]

Performs the conversion.

impl<C> Verifier<Signature<C>> for VerifyingKey<C> where
    C: Curve + Order + ProjectiveArithmetic + DigestPrimitive,
    C::Digest: Digest<OutputSize = C::FieldSize>,
    AffinePoint<C>: Copy + Clone + Debug + VerifyPrimitive<C>,
    ProjectivePoint<C>: From<AffinePoint<C>>,
    Scalar<C>: PrimeField<Repr = FieldBytes<C>> + FromDigest<C>,
    SignatureSize<C>: ArrayLength<u8>, [src]

fn verify(&self, msg: &[u8], signature: &Signature<C>) -> Result<(), Error>[src]

Use Self to verify that the provided signature for a given message bytestring is authentic. Read more

impl<C> Copy for Signature<C> where
    C: Curve + Order,
    SignatureSize<C>: ArrayLength<u8>,
    <SignatureSize<C> as ArrayLength<u8>>::ArrayType: Copy, [src]

impl<C: Eq + Curve + Order> Eq for Signature<C> where
    SignatureSize<C>: ArrayLength<u8>, [src]

impl<C: Curve + Order> StructuralEq for Signature<C> where
    SignatureSize<C>: ArrayLength<u8>, [src]

impl<C: Curve + Order> StructuralPartialEq for Signature<C> where
    SignatureSize<C>: ArrayLength<u8>, [src]

Auto Trait Implementations

impl<C> RefUnwindSafe for Signature<C> where
    <<<C as Curve>::FieldSize as Add<<C as Curve>::FieldSize>>::Output as ArrayLength<u8>>::ArrayType: RefUnwindSafe, 

impl<C> Send for Signature<C>

impl<C> Sync for Signature<C>

impl<C> Unpin for Signature<C> where
    <<<C as Curve>::FieldSize as Add<<C as Curve>::FieldSize>>::Output as ArrayLength<u8>>::ArrayType: Unpin, 

impl<C> UnwindSafe for Signature<C> where
    <<<C as Curve>::FieldSize as Add<<C as Curve>::FieldSize>>::Output as ArrayLength<u8>>::ArrayType: UnwindSafe, 

Blanket Implementations

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

pub fn type_id(&self) -> TypeId[src]

Gets the TypeId of self. Read more

impl<A, T> AsBits<T> for A where
    T: BitStore + BitRegister,
    A: AsRef<[T]>, 

pub fn as_bits<O>(&self) -> &BitSlice<O, T> where
    O: BitOrder, 

Views memory as a slice of immutable bits. Read more

impl<T> Borrow<T> for T where
    T: ?Sized, [src]

pub fn borrow(&self) -> &T[src]

Immutably borrows from an owned value. Read more

impl<T> BorrowMut<T> for T where
    T: ?Sized, [src]

pub fn borrow_mut(&mut self) -> &mut T[src]

Mutably borrows from an owned value. Read more

impl<T> Conv for T

fn conv<T>(self) -> T where
    Self: Into<T>, 

Converts self into T using Into<T>. Read more

impl<T> Conv for T

fn conv<T>(self) -> T where
    Self: Into<T>, 

Converts self into a target type. Read more

impl<T> FmtForward for T

fn fmt_binary(self) -> FmtBinary<Self> where
    Self: Binary, 

Causes self to use its Binary implementation when Debug-formatted.

fn fmt_display(self) -> FmtDisplay<Self> where
    Self: Display, 

Causes self to use its Display implementation when Debug-formatted. Read more

fn fmt_lower_exp(self) -> FmtLowerExp<Self> where
    Self: LowerExp, 

Causes self to use its LowerExp implementation when Debug-formatted. Read more

fn fmt_lower_hex(self) -> FmtLowerHex<Self> where
    Self: LowerHex, 

Causes self to use its LowerHex implementation when Debug-formatted. Read more

fn fmt_octal(self) -> FmtOctal<Self> where
    Self: Octal, 

Causes self to use its Octal implementation when Debug-formatted.

fn fmt_pointer(self) -> FmtPointer<Self> where
    Self: Pointer, 

Causes self to use its Pointer implementation when Debug-formatted. Read more

fn fmt_upper_exp(self) -> FmtUpperExp<Self> where
    Self: UpperExp, 

Causes self to use its UpperExp implementation when Debug-formatted. Read more

fn fmt_upper_hex(self) -> FmtUpperHex<Self> where
    Self: UpperHex, 

Causes self to use its UpperHex implementation when Debug-formatted. Read more

impl<T> From<T> for T[src]

pub fn from(t: T) -> T[src]

Performs the conversion.

impl<T, U> Into<U> for T where
    U: From<T>, [src]

pub fn into(self) -> U[src]

Performs the conversion.

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

fn pipe<R>(self, func: impl FnOnce(Self) -> R) -> R

Pipes by value. This is generally the method you want to use. Read more

fn pipe_ref<'a, R>(&'a self, func: impl FnOnce(&'a Self) -> R) -> R where
    R: 'a, 

Borrows self and passes that borrow into the pipe function. Read more

fn pipe_ref_mut<'a, R>(&'a mut self, func: impl FnOnce(&'a mut Self) -> R) -> R where
    R: 'a, 

Mutably borrows self and passes that borrow into the pipe function. Read more

fn pipe_borrow<'a, B, R>(&'a self, func: impl FnOnce(&'a B) -> R) -> R where
    Self: Borrow<B>,
    B: 'a + ?Sized,
    R: 'a, 

Borrows self, then passes self.borrow() into the pipe function. Read more

fn pipe_borrow_mut<'a, B, R>(
    &'a mut self,
    func: impl FnOnce(&'a mut B) -> R
) -> R where
    Self: BorrowMut<B>,
    B: 'a + ?Sized,
    R: 'a, 

Mutably borrows self, then passes self.borrow_mut() into the pipe function. Read more

fn pipe_as_ref<'a, U, R>(&'a self, func: impl FnOnce(&'a U) -> R) -> R where
    Self: AsRef<U>,
    U: 'a + ?Sized,
    R: 'a, 

Borrows self, then passes self.as_ref() into the pipe function.

fn pipe_as_mut<'a, U, R>(&'a mut self, func: impl FnOnce(&'a mut U) -> R) -> R where
    Self: AsMut<U>,
    U: 'a + ?Sized,
    R: 'a, 

Mutably borrows self, then passes self.as_mut() into the pipe function. Read more

fn pipe_deref<'a, T, R>(&'a self, func: impl FnOnce(&'a T) -> R) -> R where
    Self: Deref<Target = T>,
    T: 'a + ?Sized,
    R: 'a, 

Borrows self, then passes self.deref() into the pipe function.

fn pipe_deref_mut<'a, T, R>(
    &'a mut self,
    func: impl FnOnce(&'a mut T) -> R
) -> R where
    Self: DerefMut<Target = T> + Deref,
    T: 'a + ?Sized,
    R: 'a, 

Mutably borrows self, then passes self.deref_mut() into the pipe function. Read more

impl<T> Pipe for T

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Pipes a value into a function that cannot ordinarily be called in suffix position. Read more

impl<T> PipeAsRef for T

fn pipe_as_ref<'a, T, R>(&'a self, func: impl FnOnce(&'a T) -> R) -> R where
    Self: AsRef<T>,
    T: 'a,
    R: 'a, 

Pipes a trait borrow into a function that cannot normally be called in suffix position. Read more

fn pipe_as_mut<'a, T, R>(&'a mut self, func: impl FnOnce(&'a mut T) -> R) -> R where
    Self: AsMut<T>,
    T: 'a,
    R: 'a, 

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fn pipe_borrow<'a, T, R>(&'a self, func: impl FnOnce(&'a T) -> R) -> R where
    Self: Borrow<T>,
    T: 'a,
    R: 'a, 

Pipes a trait borrow into a function that cannot normally be called in suffix position. Read more

fn pipe_borrow_mut<'a, T, R>(
    &'a mut self,
    func: impl FnOnce(&'a mut T) -> R
) -> R where
    Self: BorrowMut<T>,
    T: 'a,
    R: 'a, 

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impl<T> PipeDeref for T

fn pipe_deref<'a, R>(&'a self, func: impl FnOnce(&'a Self::Target) -> R) -> R where
    Self: Deref,
    R: 'a, 

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fn pipe_deref_mut<'a, R>(
    &'a mut self,
    func: impl FnOnce(&'a mut Self::Target) -> R
) -> R where
    Self: DerefMut,
    R: 'a, 

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impl<T> PipeRef for T

fn pipe_ref<'a, R>(&'a self, func: impl FnOnce(&'a Self) -> R) -> R where
    R: 'a, 

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    R: 'a, 

Pipes a mutable reference into a function that cannot ordinarily be called in suffix position. Read more

impl<T> Same<T> for T

type Output = T

Should always be Self

impl<T> Tap for T

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

Immutable access to a value. Read more

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

Mutable access to a value. Read more

fn tap_borrow<B>(self, func: impl FnOnce(&B)) -> Self where
    Self: Borrow<B>,
    B: ?Sized, 

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fn tap_borrow_mut<B>(self, func: impl FnOnce(&mut B)) -> Self where
    Self: BorrowMut<B>,
    B: ?Sized, 

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fn tap_ref<R>(self, func: impl FnOnce(&R)) -> Self where
    Self: AsRef<R>,
    R: ?Sized, 

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fn tap_ref_mut<R>(self, func: impl FnOnce(&mut R)) -> Self where
    Self: AsMut<R>,
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fn tap_deref<T>(self, func: impl FnOnce(&T)) -> Self where
    Self: Deref<Target = T>,
    T: ?Sized, 

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fn tap_deref_mut<T>(self, func: impl FnOnce(&mut T)) -> Self where
    Self: DerefMut<Target = T> + Deref,
    T: ?Sized, 

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

Calls .tap() only in debug builds, and is erased in release builds.

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

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fn tap_borrow_dbg<B>(self, func: impl FnOnce(&B)) -> Self where
    Self: Borrow<B>,
    B: ?Sized, 

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fn tap_borrow_mut_dbg<B>(self, func: impl FnOnce(&mut B)) -> Self where
    Self: BorrowMut<B>,
    B: ?Sized, 

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fn tap_ref_dbg<R>(self, func: impl FnOnce(&R)) -> Self where
    Self: AsRef<R>,
    R: ?Sized, 

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fn tap_ref_mut_dbg<R>(self, func: impl FnOnce(&mut R)) -> Self where
    Self: AsMut<R>,
    R: ?Sized, 

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fn tap_deref_dbg<T>(self, func: impl FnOnce(&T)) -> Self where
    Self: Deref<Target = T>,
    T: ?Sized, 

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fn tap_deref_mut_dbg<T>(self, func: impl FnOnce(&mut T)) -> Self where
    Self: DerefMut<Target = T> + Deref,
    T: ?Sized, 

Calls .tap_deref_mut() only in debug builds, and is erased in release builds. Read more

impl<T> Tap for T

fn tap<F, R>(self, func: F) -> Self where
    F: FnOnce(&Self) -> R, 

Provides immutable access for inspection. Read more

fn tap_dbg<F, R>(self, func: F) -> Self where
    F: FnOnce(&Self) -> R, 

Calls tap in debug builds, and does nothing in release builds.

fn tap_mut<F, R>(self, func: F) -> Self where
    F: FnOnce(&mut Self) -> R, 

Provides mutable access for modification. Read more

fn tap_mut_dbg<F, R>(self, func: F) -> Self where
    F: FnOnce(&mut Self) -> R, 

Calls tap_mut in debug builds, and does nothing in release builds.

impl<T, U> TapAsRef<U> for T where
    U: ?Sized, 

fn tap_ref<F, R>(self, func: F) -> Self where
    Self: AsRef<T>,
    F: FnOnce(&T) -> R, 

Provides immutable access to the reference for inspection.

fn tap_ref_dbg<F, R>(self, func: F) -> Self where
    Self: AsRef<T>,
    F: FnOnce(&T) -> R, 

Calls tap_ref in debug builds, and does nothing in release builds.

fn tap_ref_mut<F, R>(self, func: F) -> Self where
    Self: AsMut<T>,
    F: FnOnce(&mut T) -> R, 

Provides mutable access to the reference for modification.

fn tap_ref_mut_dbg<F, R>(self, func: F) -> Self where
    Self: AsMut<T>,
    F: FnOnce(&mut T) -> R, 

Calls tap_ref_mut in debug builds, and does nothing in release builds.

impl<T, U> TapBorrow<U> for T where
    U: ?Sized, 

fn tap_borrow<F, R>(self, func: F) -> Self where
    Self: Borrow<T>,
    F: FnOnce(&T) -> R, 

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fn tap_borrow_dbg<F, R>(self, func: F) -> Self where
    Self: Borrow<T>,
    F: FnOnce(&T) -> R, 

Calls tap_borrow in debug builds, and does nothing in release builds.

fn tap_borrow_mut<F, R>(self, func: F) -> Self where
    Self: BorrowMut<T>,
    F: FnOnce(&mut T) -> R, 

Provides mutable access to the borrow for modification.

fn tap_borrow_mut_dbg<F, R>(self, func: F) -> Self where
    Self: BorrowMut<T>,
    F: FnOnce(&mut T) -> R, 

Calls tap_borrow_mut in debug builds, and does nothing in release builds. Read more

impl<T> TapDeref for T

fn tap_deref<F, R>(self, func: F) -> Self where
    Self: Deref,
    F: FnOnce(&Self::Target) -> R, 

Immutably dereferences self for inspection.

fn tap_deref_dbg<F, R>(self, func: F) -> Self where
    Self: Deref,
    F: FnOnce(&Self::Target) -> R, 

Calls tap_deref in debug builds, and does nothing in release builds.

fn tap_deref_mut<F, R>(self, func: F) -> Self where
    Self: DerefMut,
    F: FnOnce(&mut Self::Target) -> R, 

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fn tap_deref_mut_dbg<F, R>(self, func: F) -> Self where
    Self: DerefMut,
    F: FnOnce(&mut Self::Target) -> R, 

Calls tap_deref_mut in debug builds, and does nothing in release builds. Read more

impl<T> ToOwned for T where
    T: Clone, [src]

type Owned = T

The resulting type after obtaining ownership.

pub fn to_owned(&self) -> T[src]

Creates owned data from borrowed data, usually by cloning. Read more

pub fn clone_into(&self, target: &mut T)[src]

🔬 This is a nightly-only experimental API. (toowned_clone_into)

recently added

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impl<T> TryConv for T

fn try_conv<T>(self) -> Result<T, Self::Error> where
    Self: TryInto<T>, 

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impl<T> TryConv for T

fn try_conv<T>(self) -> Result<T, Self::Error> where
    Self: TryInto<T>, 

Attempts to convert self into a target type. Read more

impl<T, U> TryFrom<U> for T where
    U: Into<T>, [src]

type Error = Infallible

The type returned in the event of a conversion error.

pub fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>[src]

Performs the conversion.

impl<T, U> TryInto<U> for T where
    U: TryFrom<T>, [src]

type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.

pub fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>[src]

Performs the conversion.