fix benchmarks

benches/oprf.rs

@@ -15,6 +15,7 @@ use opaque_ke::{
     oprf::{generate_oprf1_shim, generate_oprf2_shim, generate_oprf3_shim, OprfClientBytes},
 };
 use rand::{prelude::ThreadRng, thread_rng};
+use sha2::Sha256;
 
 fn oprf1(c: &mut Criterion) {
     let mut csprng: ThreadRng = thread_rng();
@@ -103,8 +104,8 @@ fn oprf3(c: &mut Criterion) {
 
     c.bench_function("generate_oprf3 with Ristretto", move |b| {
         b.iter(|| {
-            let _res =
-                generate_oprf3_shim::<RistrettoPoint>(input, beta, &blinding_factor).unwrap();
+            let _res = generate_oprf3_shim::<RistrettoPoint, Sha256>(input, beta, &blinding_factor)
+                .unwrap();
         })
     });
 }
@@ -126,7 +127,8 @@ fn oprf3_edwards(c: &mut Criterion) {
 
     c.bench_function("generate_oprf3 with Edwards", move |b| {
         b.iter(|| {
-            let _res = generate_oprf3_shim::<EdwardsPoint>(input, beta, &blinding_factor).unwrap();
+            let _res =
+                generate_oprf3_shim::<EdwardsPoint, Sha256>(input, beta, &blinding_factor).unwrap();
         })
     });
 }

src/oprf.rs

@@ -78,12 +78,12 @@ pub fn generate_oprf2_shim<G: Group>(
 
 #[cfg(feature = "bench")]
 #[inline]
-pub fn generate_oprf3_shim<G: Group>(
+pub fn generate_oprf3_shim<G: Group, H: Hash>(
     input: &[u8],
     point: G,
     blinding_factor: &G::Scalar,
-) -> Result<GenericArray<u8, U32>, InternalPakeError> {
-    generate_oprf3(input, point, blinding_factor)
+) -> Result<GenericArray<u8, <H as Digest>::OutputSize>, InternalPakeError> {
+    generate_oprf3::<G, H>(input, point, blinding_factor)
 }
 
 // Tests