htpec page corruption fix

pgins_fix.py

from sys import argv
from x64dbg_automate import X64DbgClient

client = X64DbgClient(argv[1])
client.attach_session(X64DbgClient.list_sessions()[0].pid)
base_addr = client.eval_sync(argv[2])[0]

start_rva = int(argv[3], 16)
end_rva = start_rva + int(argv[4], 16)

io4 = int(argv[5])

data = bytearray(client.read_memory(base_addr, end_rva))

start_pg = start_rva >> 12
end_pg = end_rva >> 12

def ror(x, n):
    return (x >> n) | ((x << (32 - n)) & ((1 << 32) - 1))

def decrypt_page(data, offset):
    offset = (offset & 0xFFFFF000)
    page_num = (offset >> 12)
    seed = page_num
    
    for i in range(io4, 0x100):
        val = (i + ror(seed, 15)) & 0xFFFFFFFF
        seed = (i + val) & 0xFFFFFFFF
        xor_val = seed & 0xFF
        xor_offset = val & 0xF
        
        # input(f"{hex(base_addr + offset + xor_offset + (0x10 * i))} {hex(data[offset + xor_offset + (0x10 * i)])} {hex(data[offset + xor_offset + (0x10 * i)] ^ xor_val)}")
        
        data[offset + xor_offset + (0x10 * i)] ^= xor_val

for pg in range(start_pg, end_pg):
    decrypt_page(data, pg << 12)

client.write_memory(base_addr, data)
client.detach_session()