flipBytes Serpent

gistfile1.txt

data byte[32]

def flipBytes(n):
    numByte = 5
    mask = 0xff
    i = 0
    while i < numByte:
        b = n & mask
        b /= 2^(i*8)
        b *= 2^((numByte-i-1)*8)
        mask *= 256
        byte[i] = b
        i += 1

    ret = byte[0]
    i = 1
    while i < numByte:
        ret = ret | byte[i]
        i += 1

    return(ret)

To get unsigned ints in Serpent:
map(lambda x: x%2**256, s.send(t.k0, c, 0, funid=5, abi=[]))