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#![crate_type = "proc-macro"]
#![recursion_limit = "128"]
#![deny(warnings, unused_import_braces, unused_qualifications)]
#![forbid(unsafe_code)]
extern crate proc_macro;
use proc_macro2::TokenStream;
use quote::quote;
use synstructure::{decl_derive, AddBounds};
fn derive_signer(mut s: synstructure::Structure) -> TokenStream {
s.add_bounds(AddBounds::None);
s.gen_impl(quote! {
gen impl<S> signature::Signer<S> for @Self
where
S: signature::PrehashSignature,
Self: signature::DigestSigner<S::Digest, S>
{
fn try_sign(&self, msg: &[u8]) -> Result<S, signature::Error> {
self.try_sign_digest(S::Digest::new().chain(msg))
}
}
})
}
decl_derive! {
[Signer] =>
derive_signer
}
fn derive_verifier(mut s: synstructure::Structure) -> TokenStream {
s.add_bounds(AddBounds::None);
s.gen_impl(quote! {
gen impl<S> signature::Verifier<S> for @Self
where
S: signature::PrehashSignature,
Self: signature::DigestVerifier<S::Digest, S>
{
fn verify(&self, msg: &[u8], signature: &S) -> Result<(), signature::Error> {
self.verify_digest(S::Digest::new().chain(msg), signature)
}
}
})
}
decl_derive! {
[Verifier] =>
derive_verifier
}
#[cfg(test)]
mod tests {
use super::*;
use synstructure::test_derive;
#[test]
fn signer() {
test_derive! {
derive_signer {
struct MySigner<C: EllipticCurve> {
scalar: Scalar<C::ScalarSize>
}
}
expands to {
#[allow(non_upper_case_globals)]
const _DERIVE_signature_Signer_S_FOR_MySigner: () = {
impl<S, C: EllipticCurve> signature::Signer<S> for MySigner<C>
where
S: signature::PrehashSignature,
Self: signature::DigestSigner<S::Digest, S>
{
fn try_sign(&self, msg: &[u8]) -> Result <S, signature::Error> {
self.try_sign_digest(S::Digest::new().chain(msg))
}
}
};
}
no_build
}
}
#[test]
fn verifier() {
test_derive! {
derive_verifier {
struct MyVerifier<C: EllipticCurve> {
point: UncompressedPoint<C>
}
}
expands to {
#[allow(non_upper_case_globals)]
const _DERIVE_signature_Verifier_S_FOR_MyVerifier: () = {
impl<S, C: EllipticCurve> signature::Verifier<S> for MyVerifier<C>
where
S: signature::PrehashSignature,
Self: signature::DigestVerifier<S::Digest, S>
{
fn verify(&self, msg: &[u8], signature: &S) -> Result<(), signature::Error> {
self.verify_digest(S::Digest::new().chain(msg), signature)
}
}
};
}
no_build
}
}
}