Trait k256::ecdsa::hazmat::SignPrimitive

pub trait SignPrimitive<C>: AsRef<Self> + Into<GenericArray<u8, <C as Curve>::FieldBytesSize>> + IsHigh + PrimeField<Repr = GenericArray<u8, <C as Curve>::FieldBytesSize>> + Reduce<<C as Curve>::Uint, Bytes = GenericArray<u8, <C as Curve>::FieldBytesSize>> + Sized
where
    C: PrimeCurve + CurveArithmetic<Scalar = Self>,
    <<C as Curve>::FieldBytesSize as Add>::Output: ArrayLength<u8>,
{
    // Provided methods
    fn try_sign_prehashed<K>(
        &self,
        k: K,
        z: &GenericArray<u8, <C as Curve>::FieldBytesSize>
    ) -> Result<(Signature<C>, Option<RecoveryId>), Error>
       where K: AsRef<Self> + Invert<Output = CtOption<Self>> { ... }
    fn try_sign_prehashed_rfc6979<D>(
        &self,
        z: &GenericArray<u8, <C as Curve>::FieldBytesSize>,
        ad: &[u8]
    ) -> Result<(Signature<C>, Option<RecoveryId>), Error>
       where Self: From<ScalarPrimitive<C>> + Invert<Output = CtOption<Self>>,
             D: Digest<OutputSize = <C as Curve>::FieldBytesSize> + BlockSizeUser + FixedOutput + FixedOutputReset { ... }
}

Available on (crate features ecdsa or sha256) and crate feature hazmat and crate feature ecdsa-core and crate feature arithmetic only.

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: &GenericArray<u8, <C as Curve>::FieldBytesSize> ) -> Result<(Signature<C>, Option<RecoveryId>), Error>

where K: AsRef<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: &GenericArray<u8, <C as Curve>::FieldBytesSize>, ad: &[u8] ) -> Result<(Signature<C>, Option<RecoveryId>), Error>

where Self: From<ScalarPrimitive<C>> + Invert<Output = CtOption<Self>>, D: Digest<OutputSize = <C as Curve>::FieldBytesSize> + BlockSizeUser + FixedOutput + FixedOutputReset,

Available on crate feature rfc6979 only.

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

Object Safety

This trait is not object safe.

Implementors

impl SignPrimitive<Secp256k1> for Scalar

Available on crate feature ecdsa only.