Trait ecdsa::hazmat::SignPrimitive
source · pub trait SignPrimitive<C>: Field + Into<FieldBytes<C>> + Reduce<C::UInt> + Sizedwhere
C: PrimeCurve + ProjectiveArithmetic + ScalarArithmetic<Scalar = Self>,
SignatureSize<C>: ArrayLength<u8>,{
// 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>> { ... }
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 { ... }
}
Expand description
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§
sourcefn 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<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.
sourcefn 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_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
sourcefn 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,
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.