Trait ecdsa::hazmat::SignPrimitive

pub trait SignPrimitive<C>: Field + Into<FieldBytes<C>> + Reduce<C::UInt> + Sizedwhere
    C: PrimeCurve + ProjectiveArithmetic + ScalarArithmetic<Scalar = Self>,
    SignatureSize<C>: ArrayLength<u8>,{
    fn try_sign_prehashed<K>(
        &self,
        k: K,
        z: FieldBytes<C>
    ) -> Result<(Signature<C>, Option<RecoveryId>)>
    where
        K: Borrow<Self> + Invert<Output = CtOption<Self>>,
    { ... }
    fn try_sign_prehashed_rfc6979<D>(
        &self,
        z: FieldBytes<C>,
        ad: &[u8]
    ) -> Result<(Signature<C>, Option<RecoveryId>)>
    where
        Self: From<ScalarCore<C>>,
        C::UInt: for<'a> From<&'a Self>,
        D: Digest + BlockSizeUser + FixedOutput<OutputSize = FieldSize<C>> + FixedOutputReset,
    { ... }
    fn try_sign_digest_rfc6979<D>(
        &self,
        msg_digest: D,
        ad: &[u8]
    ) -> Result<(Signature<C>, Option<RecoveryId>)>
    where
        Self: From<ScalarCore<C>>,
        C::UInt: for<'a> From<&'a Self>,
        D: Digest + BlockSizeUser + FixedOutput<OutputSize = FieldSize<C>> + FixedOutputReset,
    { ... }
}

Try to sign the given prehashed message using ECDSA.

This trait is intended to be implemented on a type with access to the secret scalar via &self, such as particular curve’s Scalar type.

Provided Methods

fn try_sign_prehashed<K>(
    &self,
    k: K,
    z: FieldBytes<C>
) -> Result<(Signature<C>, Option<RecoveryId>)>where
    K: Borrow<Self> + Invert<Output = CtOption<Self>>,

Try to sign the prehashed message.

Accepts the following arguments:

• k: ephemeral scalar value. MUST BE UNIFORMLY RANDOM!!!
• z: message digest to be signed. MUST BE OUTPUT OF A CRYPTOGRAPHICALLY SECURE DIGEST ALGORITHM!!!

Returns

ECDSA Signature and, when possible/desired, a RecoveryId which can be used to recover the verifying key for a given signature.

fn try_sign_prehashed_rfc6979<D>(
    &self,
    z: FieldBytes<C>,
    ad: &[u8]
) -> Result<(Signature<C>, Option<RecoveryId>)>where
    Self: From<ScalarCore<C>>,
    C::UInt: for<'a> From<&'a Self>,
    D: Digest + BlockSizeUser + FixedOutput<OutputSize = FieldSize<C>> + FixedOutputReset,

Try to sign the given message digest deterministically using the method described in RFC6979 for computing ECDSA ephemeral scalar k.

Accepts the following parameters:

• z: message digest to be signed.
• ad: optional additional data, e.g. added entropy from an RNG

fn try_sign_digest_rfc6979<D>(
    &self,
    msg_digest: D,
    ad: &[u8]
) -> Result<(Signature<C>, Option<RecoveryId>)>where
    Self: From<ScalarCore<C>>,
    C::UInt: for<'a> From<&'a Self>,
    D: Digest + BlockSizeUser + FixedOutput<OutputSize = FieldSize<C>> + FixedOutputReset,

Try to sign the given digest instance using the method described in RFC6979.

Implementors