print(e)
address = Nakasendo.BSVAddress.initFromAddress(addressStrValid)
print("Address: %s has valid = %s" %
(addressStrValid, bool(address.valid)))
#creata an Asmkey ..
#use ECDSA to sign
#use Nakasendo to verify
AliceKey = Nakasendo.ECKey256K1(asHex=True)
ecdsaPubKey = int(AliceKey.priKey, 16) * G
print('Public Key for ecdsa verification %s' % ecdsaPubKey)
points = ecdsaPubKey
xval = hex(ecdsaPubKey.x())[2:]
yval = hex(ecdsaPubKey.y())[2:]
pempubkey = Nakasendo.pubKeyHexPtasPem(xval, yval)
pubkeytest = ecdsa.ecdsa.Public_key(G, ecdsaPubKey)
privkeytest = ecdsa.ecdsa.Private_key(pubkeytest, int(AliceKey.priKey, 16))
#print ('private key %s' % secret.value )
#ecdsa_sig = privkeytest.sign(int(Hm.value,16),int(inv_k.value,16))
#signature = ecdsa.util.sigencode_der_canonize(ecdsa_sig.r, ecdsa_sig.s,int(modulo_n.value,16))
message = 'Im a message and Im about to be hashed'
print('Private Key in Hex %s \n Public Key Hex %s' %
(AliceKey.priKey, AliceKey.pubKey))
hashedT = Nakasendo.hash256(message)
print(hashedT)
ecdsa_sig = privkeytest.sign(int(hashedT.value, 16),
message = sys.argv[4]
dersigStr = None
if (len(sys.argv) == 6):
dersigStr = sys.argv[5]
print('[%s, %s] \n pubkey %s \nmessage = %s' %
(sigRStr, sigSStr, pubKeyStr, message))
# create an ECPoint
pt = Nakasendo.ECPoint()
pt.value = pubKeyStr
#print(pt.GetAffineCoOrdinates())
coords = pt.GetAffineCoOrdinates()
pempubkey = Nakasendo.pubKeyHexPtasPem(coords[0], coords[1])
print(pempubkey)
print('verify the pem format')
pubKeyStrValidate = Nakasendo.pubKeyPEMasHex(pempubkey, True)
#print(pubKeyStrValidate)
# get the affine co-ordinates
# get pem format
valPem = Nakasendo.verify(message, pempubkey, sigRStr, sigSStr)
if (valPem == True):
print(
'Calculated signature verified with calculated PEM & call to verify'
)
else:
print('Failed to verify with calculated PEM')
