Add vector backend for computing δ(aA + bB - C) in variable time

dalek-cryptography · Mar 30, 2024 · fd8952c · fd8952c
1 parent ee6bba2
commit fd8952c
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Showing 7 changed files with 3,423 additions and 1 deletion.
diff --git a/curve25519-dalek/src/backend/mod.rs b/curve25519-dalek/src/backend/mod.rs
@@ -265,5 +265,13 @@ pub fn scalar_mul_abglsv_pornin(
     b: &Scalar,
     C: &EdwardsPoint,
 ) -> EdwardsPoint {
-    serial::scalar_mul::abglsv_pornin::mul(a, A, b, C)
+    match get_selected_backend() {
+        #[cfg(curve25519_dalek_backend = "simd")]
+        BackendKind::Avx2 => vector::scalar_mul::abglsv_pornin::spec_avx2::mul(a, A, b, C),
+        #[cfg(all(curve25519_dalek_backend = "simd", nightly))]
+        BackendKind::Avx512 => {
+            vector::scalar_mul::abglsv_pornin::spec_avx512ifma_avx512vl::mul(a, A, b, C)
+        }
+        BackendKind::Serial => serial::scalar_mul::abglsv_pornin::mul(a, A, b, C),
+    }
 }