def xor(key, data):
    return bytes(x ^ y for x, y in zip(key * len(data), data))


def viscrypt(data):
    return xor(data, data[1:] + b"\xaa")


def round(key, rawdata):
    return viscrypt(xor(key, rawdata))

cipher_hex="5e904cfb42a18e054f9b04a057ab81421b9c18b046a59b1f48914de312e58b011dc25bfe15e6d75f54941cb04abc8112569534"

cipher=bytes.fromhex(cipher_hex)

def get_key(original,shifted,number,cipher):
    return(ord(chr(ord(original)^ord(shifted)^number^cipher)))


expected8="srdnlen{"
left_shift_expected8="rdnlen{"

key=[0]*8

key[2]=ord(chr(cipher[50]^170^ord('}')))

key[1]=get_key('r','d',key[2],cipher[1])
key[0]=get_key('s','r',key[1],cipher[0])
key[3]=get_key('d','n',key[2],cipher[2])
key[4]=get_key('n','l',key[3],cipher[3])
key[5]=get_key('l','e',key[4],cipher[4])
key[6]=get_key('e','n',key[5],cipher[5])
key[7]=get_key('n','{',key[6],cipher[6])


print(key)

#key=[58,101,227,165,92,23,189,38]

quasi_output=[]

for i in range(0,len(cipher)):
    quasi_output.append(cipher[i] ^ key[(i+1)%8] ^ key[(i)%8])

last=ord('}') #quasi_output[-1]^key[3]^170

print(chr (last))

quasi_output[-1]=last

for i in range(49,0,-1):
    quasi_output[i]^=quasi_output[i+1]

print(quasi_output)

output=""
for i in range(0,len(quasi_output)):
    output+=chr(quasi_output[i])

print(output)