Update ecdsa.py

starkbank · May 7, 2021 · f53358c · f53358c
1 parent 4a46a45
commit f53358c
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/ellipticcurve/ecdsa.py b/ellipticcurve/ecdsa.py
@@ -37,4 +37,5 @@ def verify(cls, message, signature, publicKey, hashfunc=sha256):
         u1 = Math.multiply(curve.G, n=(numberMessage * inv) % curve.N, A=curve.A, P=curve.P, N=curve.N)
         u2 = Math.multiply(publicKey.point, n=(sigR * inv) % curve.N, A=curve.A, P=curve.P, N=curve.N)
         add = Math.add(u1, u2, P=curve.P, A=curve.A)
-        return sigR == add.x
+        modX = add.x % curve.N
+        return sigR == modX