Esempi in Python per double_ate

Esempio n. 1

File: mpin.py Progetto: lovesh/core

def server(ID, Y, SS, U, V):
    P = H(ID)
    y = big.from_bytes(Y)

    Q = ecp2.generator()

    P = y * P

    sQ = ECp2()
    if not sQ.fromBytes(SS):
        return (False, Fp12(), Fp12())

    TU = ECp()
    if not TU.fromBytes(U):
        return (False, bytearray(0), bytearray(0))

    TV = ECp()
    if not TV.fromBytes(V):
        return (False, bytearray(0), bytearray(0))

    TU.add(P)
    # TU.affine()

    r = pair.double_ate(Q, TV, sQ, TU)
    r = pair.fexp(r)

    if r.isone():
        return (True, bytearray(0), bytearray(0))


# failed - diagnose it
    E = r.toBytes()
    r = pair.e(Q, TU)
    F = r.toBytes()
    return (False, E, F)

Esempio n. 2

File: mpin.py Progetto: apache/incubator-milagro-crypto

def server(ID, Y, SS, U, V):
    P = H(ID)
    y = big.from_bytes(Y)

    Q = ecp2.generator()

    P = y * P

    sQ = ECp2()
    if not sQ.fromBytes(SS):
        return (False, Fp12(), Fp12())

    TU = ECp()
    if not TU.fromBytes(U):
        return (False, bytearray(0), bytearray(0))

    TV = ECp()
    if not TV.fromBytes(V):
        return (False, bytearray(0), bytearray(0))

    TU.add(P)
    # TU.affine()

    r = pair.double_ate(Q, TV, sQ, TU)
    r = pair.fexp(r)

    if r.isone():
        return (True, bytearray(0), bytearray(0))

# failed - diagnose it
    E = r.toBytes()
    r = pair.e(Q, TU)
    F = r.toBytes()
    return (False, E, F)