我正在尝试将哈希反转为字节序列。功能如下所示。
def decrypt(hash, size):
bytes = bin(int(hash, 16)).replace("0b", "").zfill(32)
bytes = flip(reverse(int(bytes, 2), 32), 33)
div = "100000100110000010001110110110111"
bytes = bytes.zfill(size*8)
div = div.zfill(size*8)
res = ""
print(bytes + " - DIV")
print(div + " - POLY")
while div[0] != "1":
res = ""
for b in range(len(bytes)):
if div[b] == bytes[b]:
res = res + "0"
else:
res = res + "1"
bytes = bin(int(res, 2) << 1).replace("0b", "").zfill(size*8)
div = bin(int(div, 2) << 1).replace("0b", "").zfill(size*8)
print(bytes + " - DIV")
print(div + " - POLY")
print(bytes)
bytes = flip(bytes[0:8], 8) + flip(bytes[8:16], 8) + flip(bytes[16:24], 8) + flip(bytes[24:32], 8) + bytes[32:len(bytes)]
bytes = bytes[0:len(bytes)-32]
bytes = [int(reverse(int(bytes[(c*8):(c+1)*8], 2), 8), 2) for c in range(int(len(bytes)/8))]
print(hex(zlib.crc32(bytearray(bytes))))
return bytes
print(decrypt(sys.argv[1], int(sys.argv[2])+4))
这是输出。
>>>python encrypt.py a
40
0xe8b7be43
[97]
>>>python decrypt.py e8b7be43 1
0000000000111101100000100001001011101000 - DIV
0000000100000100110000010001110110110111 - POLY
0000001001110010100001100001111010111110 - DIV
0000001000001001100000100011101101101110 - POLY
0000000011110110000010000100101110100000 - DIV
0000010000010011000001000111011011011100 - POLY
0000100111001010000110000111101011111000 - DIV
0000100000100110000010001110110110111000 - POLY
0000001111011000001000010010111010000000 - DIV
0001000001001100000100011101101101110000 - POLY
0010011100101000011000011110101111100000 - DIV
0010000010011000001000111011011011100000 - POLY
0000111101100000100001001011101000000000 - DIV
0100000100110000010001110110110111000000 - POLY
1001110010100001100001111010111110000000 - DIV
1000001001100000100011101101101110000000 - POLY
1001110010100001100001111010111110000000
0xa0058808
[198]
这里的问题是“解密”函数生成的字节数组的哈希与输入哈希 e8b7be43 不匹配。我该如何解决这个问题?