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[原创]第二题 子鼠开天
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发表于: 2020-4-16 17:06
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 | #!/usr/bin/env python3from Crypto.Cipher import AESimport gmpy2import hashlibimport binasciifrom Crypto.Util.number import bytes_to_longkey = [0x48, 0x0B, 0x62, 0xC3, 0xAC, 0xD6, 0xC8, 0xA3, 0x6B, 0x18, 0xD9, 0xE9, 0x06, 0xCD, 0x90, 0xD2]# str to hex# aes decryption# mod_n = b'i\x820(Wte\xab9\x91\xdf\x04QF\xf9\x1dUm\xee\x88p\x84]\x8e\xe1\xcd<\xf7~J\x0c9'mod_n = gmpy2.mpz(0x69823028577465ab3991df045146f91d556dee8870845d8ee1cd3cf77e4a0c39)# 94aea8ebf17c84bb40acd07433e77dcd3038f95dc0ce1b427ac21f714d19c56f# B1AC71D22D82EBB1head = bytes([0xB9, 0x79, 0x37, 0x9E])tail = bytes([0xDE, 0xED, 0xBE, 0xEF])def myhash(str): sha512 = hashlib.sha512() sha512.update(str) get_str = sha512.digest() md5 = hashlib.md5() md5.update(get_str) return md5.digest()def genhash(username): temp = username + tail get_temp_hash = myhash(temp) return myhash(get_temp_hash + head)print(genhash(b"B1AC71D22D82EBB1"))# input_str == len(64)# sn = binascii.unhexlify(input_str)# aes = AES.new(bytes(key))# temp_1 = aes.decrypt(sn)# e = 65537# get_final = gmpy2.powmod(bytes_to_long(temp_1), e, mod_n)# hex(get_final[1]) == 2, hex(get_final[15]) == 0# len(hex(get_final)) == 32 |
满足条件即可
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