def __init__(
self,
sig: bytes = bytes()
) -> None:
self.value: G1Obj = G1Obj()
if len(sig) == 0:
MilagroPairing.ECP_BLS381_inf(byref(self.value))
return
g: Tuple[bool, bool, bool, Big384] = parse(sig)
if g[0] != g[1]:
raise Exception("Infinite flag set improperly.")
if g[0]:
MilagroPairing.ECP_BLS381_inf(byref(self.value))
return
if MilagroPairing.ECP_BLS381_setx(byref(self.value), g[3], 0) != 1:
raise Exception("Invalid G1.")
yNeg: FP1Obj = FP1Obj()
MilagroPairing.FP_BLS381_neg(byref(yNeg), byref(self.value.y))
a: Big384 = Big384()
b: Big384 = Big384()
MilagroCurve.FP_BLS381_redc(a, byref(self.value.y))
MilagroCurve.FP_BLS381_redc(b, byref(yNeg))
if (MilagroCurve.BIG_384_58_comp(a, b) == 1) != g[2]:
if MilagroPairing.ECP_BLS381_setx(byref(self.value), g[3], 1) != 1:
raise Exception("Setting a proven valid X failed.")
def __init__(
self,
key: bytes
) -> None:
key = key.rjust(48, b'\0')
self.value: Big384 = Big384()
MilagroCurve.BIG_384_58_fromBytesLen(self.value, c_char_p(key), 48)
MilagroCurve.BIG_384_58_mod(self.value, r)
def serialize(
self
) -> bytes:
x: Big384 = Big384()
y: Big384 = Big384()
MilagroCurve.ECP_BLS381_get(x, y, byref(self.value))
yNeg: Big384 = Big384()
MilagroCurve.FP_BLS381_neg(self.value.y, self.value.y)
MilagroCurve.ECP_BLS381_get(x, yNeg, byref(self.value))
MilagroCurve.FP_BLS381_neg(self.value.y, self.value.y)
return bytes(serialize(x, MilagroCurve.BIG_384_58_comp(y, yNeg) == 1))
def parse(
gArg: bytes,
second: bool = False
) -> Tuple[bool, bool, bool, Big384]:
if len(gArg) != 48:
raise Exception("Invalid length G.")
flags = gArg[0]
g: bytearray = bytearray(gArg)
g[0] = g[0] & CLEAR_FLAGS
if (not second) and (flags & C_FLAG == 0):
raise Exception("Uncompressed G.")
b: int = 1
if flags & B_FLAG != 0:
while b < 48:
if g[b] != 0:
break
b += 1
result: Big384 = Big384()
MilagroCurve.BIG_384_58_fromBytesLen(result, c_char_p(bytes(g)), 48)
return (flags & B_FLAG != 0, b == 48, flags & A_FLAG != 0, result)
def msgToG(
msg: bytes
) -> G1Obj:
result: G1Obj = G1Obj()
hashed: OctetObj = OctetObj()
shake: Any = shake_256()
shake.update(msg)
hashed.val = c_char_p(shake.digest(48))
hashed.len = 48
hashed.max = 48
MilagroCurve.ECP_BLS381_mapit(byref(result), hashed)
return result
def verify(
self,
agInfo: AggregationInfo
) -> bool:
if self.isInf():
return False
sig: G1Obj = self.value
generator: G2Obj = G2Obj()
sigPairing: FP12Obj = FP12Obj()
MilagroCurve.ECP_BLS381_neg(byref(sig))
MilagroPairing.ECP2_BLS381_generator(byref(generator))
MilagroPairing.PAIR_BLS381_ate(byref(sigPairing), byref(generator), byref(sig))
MilagroPairing.FP12_BLS381_ssmul(byref(sigPairing), byref(agInfo.value))
MilagroPairing.PAIR_BLS381_fexp(byref(sigPairing))
return int(MilagroPairing.FP12_BLS381_isunity(byref(sigPairing))) == 1
def serialize(
self
) -> bytes:
yNeg: FP2Obj = FP2Obj()
cmpRes: int
MilagroPairing.FP2_BLS381_neg(byref(yNeg), byref(self.value.y))
a: Big384 = Big384()
b: Big384 = Big384()
MilagroCurve.FP_BLS381_redc(a, byref(self.value.y.b))
MilagroCurve.FP_BLS381_redc(b, byref(yNeg.b))
cmpRes = MilagroCurve.BIG_384_58_comp(a, b)
if cmpRes == 0:
MilagroCurve.FP_BLS381_redc(a, byref(self.value.y.a))
MilagroCurve.FP_BLS381_redc(b, byref(yNeg.a))
cmpRes = MilagroCurve.BIG_384_58_comp(a, b)
MilagroCurve.FP_BLS381_redc(a, byref(self.value.x.a))
MilagroCurve.FP_BLS381_redc(b, byref(self.value.x.b))
result: bytearray = serialize(b, cmpRes == 1)
result += serialize(a, False)
result[48] = result[48] & CLEAR_FLAGS
return bytes(result)
def __init__(
self,
key: bytes = bytes()
) -> None:
self.value: G2Obj = G2Obj()
if len(key) == 0:
MilagroPairing.ECP2_BLS381_inf(byref(self.value))
return
if len(key) != 96:
raise Exception("Invalid length Public Key.")
if key[48] != (key[48] & CLEAR_FLAGS):
raise Exception("G2's second G has flags set.")
g1: Tuple[bool, bool, bool, Big384] = parse(key[0 : 48])
g2: Tuple[bool, bool, bool, Big384] = parse(key[48 : 96], True)
if g1[0] != (g1[1] & g2[1]):
raise Exception("Infinite flag set improperly.")
if g1[0]:
MilagroPairing.ECP2_BLS381_inf(byref(self.value))
return
x: FP2Obj = FP2Obj()
MilagroPairing.FP2_BLS381_from_BIGs(byref(x), g2[3], g1[3])
if MilagroPairing.ECP2_BLS381_setx(byref(self.value), byref(x)) == 0:
raise Exception("Invalid G2.")
yNeg: FP2Obj = FP2Obj()
cmpRes: int
MilagroPairing.FP2_BLS381_neg(byref(yNeg), byref(self.value.y))
a: Big384 = Big384()
b: Big384 = Big384()
MilagroCurve.FP_BLS381_redc(a, byref(self.value.y.b))
MilagroCurve.FP_BLS381_redc(b, byref(yNeg.b))
cmpRes = MilagroCurve.BIG_384_58_comp(a, b)
if cmpRes == 0:
MilagroCurve.FP_BLS381_redc(a, byref(self.value.y.a))
MilagroCurve.FP_BLS381_redc(b, byref(yNeg.a))
cmpRes = MilagroCurve.BIG_384_58_comp(a, b)
if (cmpRes == 1) != g1[2]:
self.value.y = yNeg
def serialize(
g: Big384,
largerY: bool
) -> bytearray:
buffer: Array[c_char] = create_string_buffer(48)
MilagroCurve.BIG_384_58_toBytes(buffer, g)
result: bytearray = bytearray(buffer)
result[0] = result[0] | C_FLAG
inf: int = 1
if result[0] == C_FLAG:
while inf < 48:
if result[inf] != 0:
break
inf += 1
if inf == 48:
result[0] = result[0] | B_FLAG
return result
if largerY:
result[0] = result[0] | A_FLAG
return result
def serialize(
self
) -> bytes:
result: Array[c_char] = create_string_buffer(48)
MilagroCurve.BIG_384_58_toBytes(result, self.value)
return bytes(result)
def isInf(
self
) -> bool:
return int(MilagroCurve.ECP_BLS381_isinf(byref(self.value))) == 1