ed25519: Fix carry bug

See dchest/tweetnacl-js#187
StableLib · Feb 10, 2020 · 8ad6b7e · 8ad6b7e
1 parent 95694e3
commit 8ad6b7e
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/packages/ed25519/ed25519.ts b/packages/ed25519/ed25519.ts
@@ -704,7 +704,7 @@ function modL(r: Uint8Array, x: Float64Array) {
         carry = 0;
         for (j = i - 32, k = i - 12; j < k; ++j) {
             x[j] += carry - 16 * x[i] * L[j - (i - 32)];
-            carry = (x[j] + 128) >> 8;
+            carry = Math.floor((x[j] + 128) / 256);
             x[j] -= carry * 256;
         }
         x[j] += carry;