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yarjor/rotate.py

Last active September 14, 2018 14:29
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[ROR & ROL] #re #reverse-engineering #operations #opcode #rotate
Raw
rotate.py
def rol(val, r_bits, max_bits):
return (val << r_bits % max_bits) & (2 ** max_bits - 1) | ((val & (2 ** max_bits - 1)) >> (max_bits - (r_bits % max_bits)))
def ror(val, r_bits, max_bits):
return ((val & (2 ** max_bits - 1)) >> r_bits % max_bits) | (val << (max_bits - (r_bits % max_bits)) & (2 ** max_bits - 1))
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