Struct ecdsa::SigningKey

pub struct SigningKey<C>where
    C: PrimeCurve + ProjectiveArithmetic,
    Scalar<C>: Invert<Output = CtOption<Scalar<C>>> + Reduce<C::UInt> + SignPrimitive<C>,
    SignatureSize<C>: ArrayLength<u8>,{ /* private fields */ }

ECDSA signing key. Generic over elliptic curves.

Requires an elliptic_curve::ProjectiveArithmetic impl on the curve, and a SignPrimitive impl on its associated Scalar type.

Implementations

impl<C> SigningKey<C>where
    C: PrimeCurve + ProjectiveArithmetic,
    Scalar<C>: Invert<Output = CtOption<Scalar<C>>> + Reduce<C::UInt> + SignPrimitive<C>,
    SignatureSize<C>: ArrayLength<u8>,

pub fn random(rng: impl CryptoRng + RngCore) -> Self

Generate a cryptographically random SigningKey.

pub fn from_bytes(bytes: &[u8]) -> Result<Self>

Initialize signing key from a raw scalar serialized as a byte slice.

pub fn to_bytes(&self) -> FieldBytes<C>

Serialize this SigningKey as bytes

pub fn as_nonzero_scalar(&self) -> &NonZeroScalar<C>

Borrow the secret NonZeroScalar value for this key.

⚠️ Warning

This value is key material.

Please treat it with the care it deserves!

pub fn verifying_key(&self) -> VerifyingKey<C>

Get the VerifyingKey which corresponds to this SigningKey

Trait Implementations

impl<C> AsRef<VerifyingKey<C>> for SigningKey<C>where
    C: PrimeCurve + ProjectiveArithmetic,
    Scalar<C>: Invert<Output = CtOption<Scalar<C>>> + Reduce<C::UInt> + SignPrimitive<C>,
    SignatureSize<C>: ArrayLength<u8>,

fn as_ref(&self) -> &VerifyingKey<C>

Converts this type into a shared reference of the (usually inferred) input type.

impl<C> Clone for SigningKey<C>where
    C: PrimeCurve + ProjectiveArithmetic + Clone,
    Scalar<C>: Invert<Output = CtOption<Scalar<C>>> + Reduce<C::UInt> + SignPrimitive<C>,
    SignatureSize<C>: ArrayLength<u8>,

fn clone(&self) -> SigningKey<C>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<C> ConstantTimeEq for SigningKey<C>where
    C: PrimeCurve + ProjectiveArithmetic,
    Scalar<C>: Invert<Output = CtOption<Scalar<C>>> + Reduce<C::UInt> + SignPrimitive<C>,
    SignatureSize<C>: ArrayLength<u8>,

fn ct_eq(&self, other: &Self) -> Choice

Determine if two items are equal.

impl<C> Debug for SigningKey<C>where
    C: PrimeCurve + ProjectiveArithmetic,
    Scalar<C>: Invert<Output = CtOption<Scalar<C>>> + Reduce<C::UInt> + SignPrimitive<C>,
    SignatureSize<C>: ArrayLength<u8>,

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

Formats the value using the given formatter.

impl<C, D> DigestSigner<D, Signature<C>> for SigningKey<C>where
    C: PrimeCurve + ProjectiveArithmetic,
    C::UInt: for<'a> From<&'a Scalar<C>>,
    D: Digest + BlockSizeUser + FixedOutput<OutputSize = FieldSize<C>> + FixedOutputReset,
    Scalar<C>: Invert<Output = CtOption<Scalar<C>>> + Reduce<C::UInt> + SignPrimitive<C>,
    SignatureSize<C>: ArrayLength<u8>,

fn try_sign_digest(&self, msg_digest: D) -> Result<Signature<C>>

Sign message digest using a deterministic ephemeral scalar (k) computed using the algorithm described in RFC6979 § 3.2.

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

Sign the given prehashed message Digest, returning a signature.

impl<C> Drop for SigningKey<C>where
    C: PrimeCurve + ProjectiveArithmetic,
    Scalar<C>: Invert<Output = CtOption<Scalar<C>>> + Reduce<C::UInt> + SignPrimitive<C>,
    SignatureSize<C>: ArrayLength<u8>,

fn drop(&mut self)

Executes the destructor for this type.

impl<C> From<&SecretKey<C>> for SigningKey<C>where
    C: PrimeCurve + ProjectiveArithmetic,
    Scalar<C>: Invert<Output = CtOption<Scalar<C>>> + Reduce<C::UInt> + SignPrimitive<C>,
    SignatureSize<C>: ArrayLength<u8>,

fn from(secret_key: &SecretKey<C>) -> Self

Converts to this type from the input type.

impl<C> From<&SigningKey<C>> for SecretKey<C>where
    C: PrimeCurve + ProjectiveArithmetic,
    Scalar<C>: Invert<Output = CtOption<Scalar<C>>> + Reduce<C::UInt> + SignPrimitive<C>,
    SignatureSize<C>: ArrayLength<u8>,

fn from(secret_key: &SigningKey<C>) -> Self

Converts to this type from the input type.

impl<C> From<&SigningKey<C>> for VerifyingKey<C>where
    C: PrimeCurve + ProjectiveArithmetic,
    Scalar<C>: Invert<Output = CtOption<Scalar<C>>> + Reduce<C::UInt> + SignPrimitive<C>,
    SignatureSize<C>: ArrayLength<u8>,

fn from(signing_key: &SigningKey<C>) -> VerifyingKey<C>

Converts to this type from the input type.

impl<C> From<NonZeroScalar<C>> for SigningKey<C>where
    C: PrimeCurve + ProjectiveArithmetic,
    Scalar<C>: Invert<Output = CtOption<Scalar<C>>> + Reduce<C::UInt> + SignPrimitive<C>,
    SignatureSize<C>: ArrayLength<u8>,

fn from(secret_scalar: NonZeroScalar<C>) -> Self

Converts to this type from the input type.

impl<C> From<SecretKey<C>> for SigningKey<C>where
    C: PrimeCurve + ProjectiveArithmetic,
    Scalar<C>: Invert<Output = CtOption<Scalar<C>>> + Reduce<C::UInt> + SignPrimitive<C>,
    SignatureSize<C>: ArrayLength<u8>,

fn from(secret_key: SecretKey<C>) -> Self

Converts to this type from the input type.

impl<C> From<SigningKey<C>> for SecretKey<C>where
    C: PrimeCurve + ProjectiveArithmetic,
    Scalar<C>: Invert<Output = CtOption<Scalar<C>>> + Reduce<C::UInt> + SignPrimitive<C>,
    SignatureSize<C>: ArrayLength<u8>,

fn from(key: SigningKey<C>) -> Self

Converts to this type from the input type.

impl<C> Keypair<Signature<C>> for SigningKey<C>where
    C: PrimeCurve + ProjectiveArithmetic,
    Scalar<C>: Invert<Output = CtOption<Scalar<C>>> + Reduce<C::UInt> + SignPrimitive<C>,
    SignatureSize<C>: ArrayLength<u8>,

type VerifyingKey = VerifyingKey<C>

Verifying key type for this keypair.

fn verifying_key(&self) -> &Self::VerifyingKey

Get the verifying key which can verify signatures produced by the signing key portion of this keypair.

impl<C> PartialEq<SigningKey<C>> for SigningKey<C>where
    C: PrimeCurve + ProjectiveArithmetic,
    Scalar<C>: Invert<Output = CtOption<Scalar<C>>> + Reduce<C::UInt> + SignPrimitive<C>,
    SignatureSize<C>: ArrayLength<u8>,

Constant-time comparison

fn eq(&self, other: &SigningKey<C>) -> bool

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

fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl<C> PrehashSigner<Signature<C>> for SigningKey<C>where
    C: PrimeCurve + ProjectiveArithmetic + DigestPrimitive,
    C::Digest: BlockSizeUser + FixedOutput<OutputSize = FieldSize<C>> + FixedOutputReset,
    C::UInt: for<'a> From<&'a Scalar<C>>,
    Scalar<C>: Invert<Output = CtOption<Scalar<C>>> + Reduce<C::UInt> + SignPrimitive<C>,
    SignatureSize<C>: ArrayLength<u8>,

fn sign_prehash(&self, prehash: &[u8]) -> Result<Signature<C>>

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

impl<C, D> RandomizedDigestSigner<D, Signature<C>> for SigningKey<C>where
    C: PrimeCurve + ProjectiveArithmetic,
    C::UInt: for<'a> From<&'a Scalar<C>>,
    D: Digest + BlockSizeUser + FixedOutput<OutputSize = FieldSize<C>> + FixedOutputReset,
    Scalar<C>: Invert<Output = CtOption<Scalar<C>>> + Reduce<C::UInt> + SignPrimitive<C>,
    SignatureSize<C>: ArrayLength<u8>,

fn try_sign_digest_with_rng(
    &self,
    rng: impl CryptoRng + RngCore,
    msg_digest: D
) -> Result<Signature<C>>

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

Sign the given prehashed message Digest, returning a signature.

impl<C> RandomizedSigner<Signature<C>> for SigningKey<C>where
    Self: RandomizedDigestSigner<C::Digest, Signature<C>>,
    C: PrimeCurve + ProjectiveArithmetic + DigestPrimitive,
    Scalar<C>: Invert<Output = CtOption<Scalar<C>>> + Reduce<C::UInt> + SignPrimitive<C>,
    SignatureSize<C>: ArrayLength<u8>,

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

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

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

Sign the given message and return a digital signature

impl<C> Signer<Signature<C>> for SigningKey<C>where
    Self: DigestSigner<C::Digest, Signature<C>>,
    C: PrimeCurve + ProjectiveArithmetic + DigestPrimitive,
    Scalar<C>: Invert<Output = CtOption<Scalar<C>>> + Reduce<C::UInt> + SignPrimitive<C>,
    SignatureSize<C>: ArrayLength<u8>,

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

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

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

Sign the given message and return a digital signature

impl<C> TryFrom<&[u8]> for SigningKey<C>where
    C: PrimeCurve + ProjectiveArithmetic,
    Scalar<C>: Invert<Output = CtOption<Scalar<C>>> + Reduce<C::UInt> + SignPrimitive<C>,
    SignatureSize<C>: ArrayLength<u8>,

type Error = Error

The type returned in the event of a conversion error.

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

Performs the conversion.

impl<C> Eq for SigningKey<C>where
    C: PrimeCurve + ProjectiveArithmetic,
    Scalar<C>: Invert<Output = CtOption<Scalar<C>>> + Reduce<C::UInt> + SignPrimitive<C>,
    SignatureSize<C>: ArrayLength<u8>,

Constant-time comparison

impl<C> ZeroizeOnDrop for SigningKey<C>where
    C: PrimeCurve + ProjectiveArithmetic,
    Scalar<C>: Invert<Output = CtOption<Scalar<C>>> + Reduce<C::UInt> + SignPrimitive<C>,
    SignatureSize<C>: ArrayLength<u8>,