add accelerate for verify

Author: gstarovo

src/ecdsa/ecdsa.py

@@ -181,7 +181,7 @@ def __ne__(self, other):
         """Return False if the keys are identical, True otherwise."""
         return not self == other
 
-    def verifies(self, hash, signature):
+    def verifies(self, hash, signature, accelerate=False):
         """Verify that signature is a valid signature of hash.
         Return True if the signature is valid.
         """
@@ -194,9 +194,9 @@ def verifies(self, hash, signature):
         s = signature.s
         if s < 1 or s > n - 1:
             return False
-        if not isinstance(r, int):
+        if accelerate:
             point = ellipticcurve.AbstractPoint.from_bytes(
-                self.generator.curve(), bytearray(r))
+                self.generator.curve(),r)
             r = point[0] % n
         if r < 1 or r > n - 1:
             return False

src/ecdsa/keys.py

@@ -633,6 +633,7 @@ def verify(
         hashfunc=None,
         sigdecode=sigdecode_string,
         allow_truncate=True,
+        accelerate=False
     ):
         """
         Verify a signature made over provided data.
@@ -682,14 +683,15 @@ def verify(
 
         hashfunc = hashfunc or self.default_hashfunc
         digest = hashfunc(data).digest()
-        return self.verify_digest(signature, digest, sigdecode, allow_truncate)
+        return self.verify_digest(signature, digest, sigdecode, allow_truncate, accelerate)
 
     def verify_digest(
         self,
         signature,
         digest,
         sigdecode=sigdecode_string,
         allow_truncate=False,
+        accelerate=False
     ):
         """
         Verify a signature made over provided hash value.
@@ -736,7 +738,7 @@ def verify_digest(
         except (der.UnexpectedDER, MalformedSignature) as e:
             raise BadSignatureError("Malformed formatting of signature", e)
         sig = ecdsa.Signature(r, s)
-        if self.pubkey.verifies(number, sig):
+        if self.pubkey.verifies(number, sig, accelerate):
             return True
         raise BadSignatureError("Signature verification failed")
 

src/ecdsa/test_malformed_sigs.py

@@ -269,7 +269,7 @@ def test_random_der_ecdsa_sig_value_full_r(params):
     verifying_key, sig = params
 
     with pytest.raises(BadSignatureError):
-        verifying_key.verify(sig, example_data, sigdecode=sigdecode_der)
+        verifying_key.verify(sig, example_data, sigdecode=sigdecode_der, accelerate=True)
 
 
 def st_der_integer(*args, **kwargs):  # pragma: no cover

src/ecdsa/test_pyecdsa.py

@@ -459,7 +459,7 @@ def test_sigencode_der_full_r(self):
         sig = priv1.sign(data, sigencode=util.sigencode_der_full_r, accelerate=True)
 
         self.assertEqual(type(sig), binary_type)
-        self.assertTrue(pub1.verify(sig, data, sigdecode=util.sigdecode_der_full_r))
+        self.assertTrue(pub1.verify(sig, data, sigdecode=util.sigdecode_der_full_r, accelerate=True))
 
     def test_sigencode_der_full_r_uncompressed(self):
         priv1 = SigningKey.generate()
@@ -483,7 +483,7 @@ def test_sigencode_der_full_r_compressed(self):
         sig = util.sigencode_der_full_r(point, s, encoding="compressed")
 
         self.assertEqual(type(sig), binary_type)
-        self.assertTrue(pub1.verify(sig, data, sigdecode=util.sigdecode_der_full_r))
+        self.assertTrue(pub1.verify(sig, data, sigdecode=util.sigdecode_der_full_r, accelerate=True))
 
     def test_sigencode_der_sig_value_with_y_boolean(self):
         priv1 = SigningKey.generate()
@@ -492,7 +492,7 @@ def test_sigencode_der_sig_value_with_y_boolean(self):
         sig = priv1.sign(data, sigencode=util.sigencode_der_sig_value_y_boolean,
                          accelerate=True)
         self.assertEqual(type(sig), binary_type)
-        self.assertTrue(pub1.verify(sig, data, sigdecode=util.sigdecode_der_ecdsa_sig_value))
+        self.assertTrue(pub1.verify(sig, data, sigdecode=util.sigdecode_der_ecdsa_sig_value, accelerate=True))
 
     def test_sigencode_der_sig_value_with_y_field_elem(self):
         priv1 = SigningKey.generate()
@@ -501,7 +501,7 @@ def test_sigencode_der_sig_value_with_y_field_elem(self):
         sig = priv1.sign(data, sigencode=util.sigencode_der_sig_value_y_field_elem,
                          accelerate=True)
         self.assertEqual(type(sig), binary_type)
-        self.assertTrue(pub1.verify(sig, data, sigdecode=util.sigdecode_der_ecdsa_sig_value))
+        self.assertTrue(pub1.verify(sig, data, sigdecode=util.sigdecode_der_ecdsa_sig_value, accelerate=True))
 
     def test_sigencode_string_canonize_no_change(self):
         r = 12