Trait Signer 

pub trait Signer<S> {
    // Required method
    fn try_sign(&self, msg: &[u8]) -> Result<S, Error>;

    // Provided method
    fn sign(&self, msg: &[u8]) -> S { ... }
}

Sign the provided message bytestring using Self (e.g. a cryptographic key or connection to an HSM), returning a digital signature.

Required Methods

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

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

The main intended use case for signing errors is when communicating with external signers, e.g. cloud KMS, HSMs, or other hardware tokens.

Provided Methods

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

Sign the given message and return a digital signature

Implementations on Foreign Types

impl<C> Signer<(Signature<C>, RecoveryId)> for SigningKey<C>

where C: PrimeCurve + CurveArithmetic + DigestPrimitive, <C as CurveArithmetic>::Scalar: Invert<Output = CtOption<<C as CurveArithmetic>::Scalar>> + SignPrimitive<C>, <<C as Curve>::FieldBytesSize as Add>::Output: ArrayLength<u8>,

Available on crate feature signing only.

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

impl<C> Signer<Signature<C>> for SigningKey<C>

where C: PrimeCurve + CurveArithmetic + DigestPrimitive, <C as CurveArithmetic>::Scalar: Invert<Output = CtOption<<C as CurveArithmetic>::Scalar>> + SignPrimitive<C>, <<C as Curve>::FieldBytesSize as Add>::Output: ArrayLength<u8> + Add<UInt<UInt<UInt<UInt<UTerm, B1>, B0>, B0>, B1>>, <<<C as Curve>::FieldBytesSize as Add>::Output as Add<UInt<UInt<UInt<UInt<UTerm, B1>, B0>, B0>, B1>>>::Output: ArrayLength<u8>,

Available on crate feature der only.

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

impl<C> Signer<Signature<C>> for SigningKey<C>

where C: PrimeCurve + CurveArithmetic + DigestPrimitive, <C as CurveArithmetic>::Scalar: Invert<Output = CtOption<<C as CurveArithmetic>::Scalar>> + SignPrimitive<C>, <<C as Curve>::FieldBytesSize as Add>::Output: ArrayLength<u8>,

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

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

impl<C> Signer<SignatureWithOid<C>> for SigningKey<C>

where C: PrimeCurve + CurveArithmetic + DigestPrimitive, <C as DigestPrimitive>::Digest: AssociatedOid, <C as CurveArithmetic>::Scalar: Invert<Output = CtOption<<C as CurveArithmetic>::Scalar>> + SignPrimitive<C>, <<C as Curve>::FieldBytesSize as Add>::Output: ArrayLength<u8>,

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

Implementors