Trait signature::PrehashSignature
source ยท pub trait PrehashSignature {
type Digest: Digest;
}
Expand description
Marker trait for Signature
types computable as ๐(๐(๐))
i.e. ones which prehash a message to be signed as ๐(๐)
Where:
๐
: signature algorithm๐
: hash (a.k.a. digest) function๐
: message
This approach is relatively common in signature schemes based on the Fiat-Shamir heuristic.
For signature types that implement this trait, when the derive
crate
feature is enabled a custom derive for Signer
is available for any
types that impl DigestSigner
, and likewise for deriving Verifier
for
types which impl DigestVerifier
.