def polynomialPreCalculation(self, poly, mod, ordinal):
self.transientData.reset()
# evaluate polynomial for own ordinal
# polynomial is set to Hex, so convert the ordinal to hex string
self.transientData.f_x = poly(str(ordinal))
bignum = Nakasendo.BigNum(self.transientData.f_x, mod)
self.transientData.hiddenEvals[self.ordinal] = \
str(Nakasendo.ECPoint().GetGeneratorPoint().multipleScalar(bignum))
# evaluate polynomials for the group ordinals
for ord in self.ordinalList:
self.transientData.evals[ord[0]] = poly(str(ord[0]))
bignum = Nakasendo.BigNum(self.transientData.evals[ord[0]], mod)
self.transientData.hiddenEvals[ord[0]] = \
str(Nakasendo.ECPoint().GetGeneratorPoint().multipleScalar(bignum))
# hide own polynomial using generator point
GEN = Nakasendo.ECPoint()
GENPOINT = GEN.GetGeneratorPoint()
for index in poly.coefficients:
bignum = Nakasendo.BigNum(index, mod)
res = GENPOINT.multipleScalar(bignum)
self.transientData.hiddenPolynomial.append(res.value)
def test_CheckOnCurveFromHexOnCurve():
# Generating Random EC Points
for x in range(10):
# using the integer value of NID secp256k1, which is 714
nID = 714
# Generate a Random EC Point with default NID ==> NID_secp256k1
hexValue = Nakasendo.ECPoint(nID)
assert hexValue.IsPointOnCurve() is True, "Test failed"
def calculateShareOfVW(self, mod):
# littleK * alpha
v = self.littleK * self.alpha
# alpha * Generator Point
GEN = Nakasendo.ECPoint()
GENPOINT = GEN.GetGeneratorPoint()
w = GENPOINT.multipleScalar(self.alpha)
return v.value, w.value
def test_MultiplyScalarMNOnCurve():
# Generating Random EC
for x in range(10):
# using the integer value of NID secp256k1, which is 714
nID = 714
# Generate a Random EC Point with default NID ==> NID_secp256k1
mValue = Nakasendo.ECPoint(nID)
nValue = Nakasendo.ECPoint(nID)
# EC Point GetAffineCoOrdinates_GFp with default NID => NID_secp256k1
x_axis, y_axis = mValue.GetAffineCoOrdinates()
assert len(x_axis) == 62 or len(x_axis) == 64, "Test failed"
# EC Point Scalar multiply with supplied curve ID
actualValue = str(mValue.multipltScalarEx(mValue, nValue))
# Verifying the the length of actual value as 66
assert len(actualValue) == 66, "Test failed"
def test_GetAffineCoOrdinates():
# Generating Random EC
for x in range(10):
# using the integer value of NID secp256k1, which is 714
nID = 714
# Generate a Random EC Point with default NID ==> NID_secp256k1
hexValue = Nakasendo.ECPoint(nID)
# EC Point GetAffineCoOrdinates_GFp with default NID => NID_secp256k1
x_axis, y_axis = hexValue.GetAffineCoOrdinates()
assert len(x_axis) == 62 or len(x_axis) == 64, "Test failed"
def calculateEphemeralKey(self, groupId):
group = self.groups[groupId]
self.ptw("Calculating Ephemeral Key...")
xfx_v = []
xfx_w = []
allOrdinals = group.allOrdinals()
#allOrdinals = []
#for i in group.ordinalList :
# allOrdinals.append( i[0] )
#allOrdinals.append(group.ordinal)
for ord in allOrdinals:
vw = group.transientData.allVWshares[ord]
xfx_v.append((ord, vw[0]))
point = Nakasendo.ECPoint()
point.SetValue(vw[1])
w_points = point.GetAffineCoOrdinates()
xfx_w.append((str(ord), w_points[0], w_points[1]))
v_interpolator = Nakasendo.LGInterpolator \
( xfx_v, Player.modulo, decimal=False)
w_interpolator = Nakasendo.LGECInterpolator \
( xfx_w, Player.modulo, decimal=False)
vZeroVal = v_interpolator('0')
wZeroVal = w_interpolator('0')
vZeroValInv = vZeroVal.inverse()
interpolated_r = wZeroVal.multipleScalar(vZeroValInv)
if (interpolated_r.IsPointOnCurve() is not True):
msg = ("Error in Player:calculateEphemeralKey: point not on curve")
self.ptw(msg)
raise PlayerError(msg)
interpolated_r_points = interpolated_r.GetAffineCoOrdinates()
r_bn = Nakasendo.BigNum(interpolated_r_points[0], Player.modulo)
ephemeralKey = [group.littleK, r_bn]
group.ephemeralKeyList.append(ephemeralKey)
def test_GetGeneratorPoint():
# Generating Random EC
for x in range(10):
# using the integer value of NID secp256k1, which is 714
nID = 714
# Generate a Random EC Point with default NID ==> NID_secp256k1
hexValue = Nakasendo.ECPoint(nID)
# EC Point GetAffineCoOrdinates_GFp with default NID => NID_secp256k1
x_axis, y_axis = hexValue.GetAffineCoOrdinates()
assert len(x_axis) == 62 or len(x_axis) == 64, "Test failed"
assert hexValue.IsPointOnCurve() is True, "Test failed"
# Generate a Elliptic curve point
xPoint = str(hexValue.GetGeneratorPoint())
assert len(xPoint) == 66, "Test failed"
def test_MultiplyByGenerator():
# Generating Random EC
for x in range(10):
# using the integer value of NID secp256k1, which is 714
nID = 714
# Generate a Random EC Point with default NID ==> NID_secp256k1
hexValue = Nakasendo.ECPoint(nID)
bigNumB = Nakasendo.BigNum()
# EC Point GetAffineCoOrdinates_GFp with default NID => NID_secp256k1
x_axis, y_axis = hexValue.GetAffineCoOrdinates()
assert len(x_axis) == 62 or len(x_axis) == 64, "Test failed"
# EC Point Scalar multiply on curve with supplied ID
actualValue = str(
Nakasendo.MultiplyByGenerator(bigNumB, compressed=True))
assert len(actualValue) == 66, "Test failed"
def test_MultiplyScalarMOnCurve():
# Generating Random EC
for x in range(10):
# using the integer value of NID secp256k1, which is 714
nID = 714
# Generate a Random EC Point with default NID ==> NID_secp256k1
hexValue = Nakasendo.ECPoint(nID)
# EC Point GetAffineCoOrdinates_GFp with default NID => NID_secp256k1
x_axis, y_axis = hexValue.GetAffineCoOrdinates()
assert len(x_axis) == 62 or len(x_axis) == 64, "Test failed"
# EC Point Scalar multiply on curve with supplied ID
actualValue = str(hexValue.multipleScalar(hexValue))
# Verifying the actual value with expected value
assert len(actualValue) == 66, "Test failed"
def test_LGECInterpolatorFull():
modulo = PyBigNumbers.GenerateRandPrimeHex(1000)
xValue = PyBigNumbers.GenerateRandHex(1000)
listTupleObj = []
dec = False
# Generating Random EC
for x in range(10, 50):
# Generate a Random EC Point with default NID ==> NID_secp256k1
hexValue = Nakasendo.ECPoint()
# Check if the point is on the curve with the supplied NID default NID ==> NID_secp256k1
assert hexValue.IsPointOnCurve(), "Test failed"
x_Axis, y_axis = hexValue.GetAffineCoOrdinates()
# EC Point GetAffineCoOrdinates_GFp with default NID => NID_secp256k1
listTupleObj.append((str(x), x_Axis, y_axis))
lgInterpolatorX = PyPolynomial.LGECInterpolatorFull(
listTupleObj, modulo, xValue, dec)
assert type(lgInterpolatorX) == str, "Test failed"
def test_LGECInterpolatorFull():
# modulo = PyBigNumbers.GenerateRandPrimeHex(1000)
modulo = "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141"
xValue = Nakasendo.BigNum().value
listTupleObj = []
hex_value = False
# Generating Random EC
for x in range(10, 50):
# Generate a Random EC Point with default NID ==> NID_secp256k1
hexValue = Nakasendo.ECPoint()
print(hexValue.value)
# Check if the point is on the curve with the supplied NID default NID ==> NID_secp256k1
assert hexValue.IsPointOnCurve(), "Test failed"
x_Axis, y_axis = hexValue.GetAffineCoOrdinates()
# EC Point GetAffineCoOrdinates_GFp with default NID => NID_secp256k1
listTupleObj.append((str(x), x_Axis, y_axis))
lgInterpolatorX = Nakasendo.LGECInterpolator(listTupleObj, modulo,
hex_value)
lgInterpolatorX = lgInterpolatorX(xValue)
assert type(lgInterpolatorX) == Nakasendo.ECPoint, "Test failed"
import PyECPoint
import PySymEncDec
import PyMessageHash
import PyAsymKey
import PyPolynomial
import Nakasendo
except ImportError as e:
print('Error while loading SDKLibraries python modules {}'.format(e.message))
print('Try to define environment variable SDKLIBRARIES_ROOT pointing to the location of installed SDKLibraries or add this to PYTHONPATH')
raise ImportError('Unable to load SDKLibraries python modules')
if __name__ == "__main__":
print ("starting.....")
ECPointA = Nakasendo.ECPoint ()
print ("ECPointA output %s" % ECPointA )
ECPointB = Nakasendo.ECPoint ()
print ("ECPointB output %s " % ECPointB)
coordsA = ECPointA.GetAffineCoOrdinates()
print ("Random Elliptic Curve Point A:\n x = %s \ny= %s" % (coordsA[0], coordsA[1]))
coordsB = ECPointB.GetAffineCoOrdinates()
print ("Random Elliptic Curve Point B:\n x = %s \ny= %s" % (coordsB[0], coordsB[1]))
bigNumA = Nakasendo.BigNum()
bigNumB = Nakasendo.BigNum(ECPointA.value)
def getECPoint(value, isDecimal=False):
ecpoint = Nakasendo.ECPoint()
ecpoint.SetValue(value)
return ecpoint
index = random.randint(0, len(Players) - 1)
if (index not in subGroupPlayersIndex):
subGroupPlayersIndex.append(index)
subGroupSigningIndex = []
while (len(subGroupSigningIndex)) < (2 * tt + 1):
index = random.randint(0, len(Players) - 1)
if (index not in subGroupSigningIndex):
subGroupSigningIndex.append(index)
#print('Players SubGroup')
vect_d = CalculateSecret(Players, modulo_n.value, isDec=False)
print(vect_d)
secret = DerivePubKey(Players, modulo_n.value, isDec=False)
GEN = Nakasendo.ECPoint(isDec=False)
GENPOINT = GEN.GetGeneratorPoint()
HiddenPoint = GENPOINT.multipleScalar(secret)
PubKeyPoints = HiddenPoint.GetAffineCoOrdinates()
print('Public Key %s %s' % (PubKeyPoints[0], PubKeyPoints[1]))
print('public key in compressed form %s' % HiddenPoint)
print('private key %s' % secret.value)
#can we recover the key from a subgroup with interpolation
#Recover the public key from a t+1 group.
print('Recover the public/private key pair from a group size of t+1 = %s' %
(tt + 1))
private_d_points = []
for i in subGroupPlayersIndex:
label_j = Players[i].getOrdinal()
e.message))
print(
'Try to define environment variable SDKLIBRARIES_ROOT pointing to the location of installed SDKLibraries or add this to PYTHONPATH'
)
raise ImportError('Unable to load SDKLibraries python modules')
if __name__ == "__main__":
print("starting.....")
bigNumA = Nakasendo.BigNum()
bigNumB = Nakasendo.BigNum()
c = bigNumA + bigNumB
print("operator A -> %s, ..... operator B-> %s" % (bigNumA, bigNumB))
print("...result of addition %s", c)
ECPointA = Nakasendo.ECPoint()
print("ECPointA output %s" % ECPointA)
ECPointB = Nakasendo.ECPoint()
print("ECPointB output %s " % ECPointB)
ECPointC = ECPointA + ECPointB
print("ECPointC (ECPointA + ECPointB) output %s " % ECPointC)
print("Testing multiplication (2 parameters)... ")
BigNumScalerA = Nakasendo.BigNum()
ECPointG = Nakasendo.ECPoint()
ECPointRes = ECPointG.multipleScalar(BigNumScalerA)
print("Multiplication res: %s " % ECPointRes)
if __name__ == "__main__":
print("...starting....")
#print (sys.argv)
sigRStr = sys.argv[1]
sigSStr = sys.argv[2]
pubKeyStr = sys.argv[3]
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):
