def testDerConversion(self):
privateKey = PrivateKey()
message = "This is a text message"
signature1 = Ecdsa.sign(message, privateKey)
der = signature1.toDer()
signature2 = Signature.fromDer(der)
self.assertEqual(signature1.r, signature2.r)
self.assertEqual(signature1.s, signature2.s)
def testDerConversion(self):
privateKey = PrivateKey()
message = "This is a text message"
signature1 = Ecdsa.sign(message, privateKey)
der = signature1.toDer(withRecoveryId=True)
signature2 = Signature.fromDer(der, recoveryByte=True)
self.assertEqual(signature1.r, signature2.r)
self.assertEqual(signature1.s, signature2.s)
self.assertEqual(signature1.recoveryId, signature2.recoveryId)
def testVerifySignature(self):
# openssl ec -in privateKey.pem -pubout -out publicKey.pem
publicKeyPem = File.read("publicKey.pem")
# openssl dgst -sha256 -sign privateKey.pem -out signature.binary message.txt
signatureDer = File.read("signatureDer.txt", "rb")
message = File.read("message.txt")
publicKey = PublicKey.fromPem(publicKeyPem)
signature = Signature.fromDer(string=signatureDer)
self.assertTrue(
Ecdsa.verify(message=message,
signature=signature,
publicKey=publicKey))