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https://github.com/ppwang06/frida_js.git
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41 lines
1.1 KiB
Python
41 lines
1.1 KiB
Python
"""
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python 与 js 函数之间转换
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python js
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int("BB", base=16) parseInt
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unsigned_right_shift >>>
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int_overflow（^） ^
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int_overflow（<<） <<
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charCodeAt ord（）
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chr(72) String.fromCharCode(72)
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str.charAt(index) str 取对应字符串
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"""
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import ctypes
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def int_overflow(val):
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maxint = 2147483647
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if not -maxint-1 <= val <= maxint:
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val = (val + (maxint + 1)) % (2 * (maxint + 1)) - maxint - 1
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return val
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# 该方法后面为负数时 不对 不推荐
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def unsigned_right_shift(n, i):
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# 如果js右移为0, 且数字小于0
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if i == 0 and n < 0:
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return n + 2 ** 32
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# 数字小于0，则转为32位无符号uint
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if n < 0:
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n = ctypes.c_uint32(n).value
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# 正常位移位数是为正数，但是为了兼容js之类的，负数就右移变成左移好了
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if i < 0:
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return -int_overflow(n << abs(i))
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return int_overflow(n >> i)
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# 推荐这个
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def unsinged_right_shift(x, y):
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x, y = ctypes.c_uint32(x).value, y % 32
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return ctypes.c_uint32(x >> y).value |