feat(huya): nonce生成机制完全破解 - 任意账号零设备出完整CK闭环
动态hook实锤(scripts/hook_nonce_chain.py): rnd = XXTEA(pack(st) + pack(counter|st<<16), key=MD5hex(uid_str + k1)[:16]) - st=毫秒时间戳, counter同st内递增 - k1=设备常量865a4924...(不随账号变, evidence/nonce_k1.json) - Python复刻(tools/nonce_forge.py)对设备两轮rnd逐字节MATCH 推翻v2误判(X2'nonce账号绑定令牌'实为nonce内编码uid): - 换账号用目标uid重算nonce而非复用旧nonce! - 纯随机nonce必40020因解不出合法st/counter结构 实测: 同账号+跨账号(hy_300024708从未设备登录)本地nonce铸证bind均通过, full_web_cookie/full_auto_safe 任意账号密码->全套cookie(udb_cred/udb_biztoken)
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#!/usr/bin/env python3
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"""虎牙证书 nonce(rnd) 生成器 —— 纯本地可算, 无需设备!
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2026-08-26 动态hook实锤(scripts/hook_nonce_chain.py, /tmp/opencode/nonce_chain.json):
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rnd = XXTEA(pack(serviceTime) + pack(nonce_next), key=MD5hex(uid_str + k1)[:16])
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其中:
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serviceTime = 当前毫秒时间戳 (int(time.time()*1000) & 0x7FFFFFFFFFFF)
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nonce_next = counter | (serviceTime << 16)
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(counter 为同 serviceTime 内递增计数, 从0开始)
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k1 = 设备级常量 32位hex (865a4924a40897ac1fcfe6b4c2cbb0e3, 不随账号变)
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key = hashlib.md5((uid_str + k1).encode()).hexdigest()[:16].encode()
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pack(x) = 8字节小端 (cred_packlsEm: append 8B LE)
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XXTEA 输出 = ceil(len/4)+1 words, 末尾 word 存原始长度 -> 16B输入 => 20B输出 = P1的rnd。
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验证: 对设备实采两轮 rnd (80dd1dfa.../0ba8f8b7...) 逐字节复现一致。
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k1 跨账号不变(uid=1199666914671 vs 1199666911746 均同值) => 任意账号可本地铸 nonce!
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"""
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from __future__ import annotations
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import hashlib
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import struct
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import time
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# 设备级常量: BusinessCfg::this+0x10 (动态hook自真机, 不随账号变化)
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# TODO: 待确认其生成源(疑为设备安装时生成并持久化), 当前直接从真机提取
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K1_DEFAULT = "865a4924a40897ac1fcfe6b4c2cbb0e3"
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# ---------------------------------------------------------------- XXTEA
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def _xxtea_encrypt_words(v: list[int], k: list[int]) -> list[int]:
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"""标准 XXTEA (delta=0x9e3779b9, rounds=6+52/n), in-place 返回。"""
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n = len(v)
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if n < 2:
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return v
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z = v[n - 1]
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y = v[0]
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s = 0
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delta = 0x9E3779B9
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q = 6 + 52 // n
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while q > 0:
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s = (s + delta) & 0xFFFFFFFF
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e = (s >> 2) & 3
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p = 0
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while p < n - 1:
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y = v[p + 1]
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z = (v[p] + ((((z >> 5) ^ (y << 2)) + ((y >> 3) ^ (z << 4)))
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^ ((s ^ y) + (k[(p & 3) ^ e] ^ z)))) & 0xFFFFFFFF
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v[p] = z
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p += 1
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y = v[0]
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z = (v[n - 1] + ((((z >> 5) ^ (y << 2)) + ((y >> 3) ^ (z << 4)))
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^ ((s ^ y) + (k[((n - 1) & 3) ^ e] ^ z)))) & 0xFFFFFFFF
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v[n - 1] = z
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q -= 1
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return v
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def xxtea_encrypt(data: bytes, key16: bytes) -> bytes:
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"""虎牙专用 XXTEA: 输出 words = ceil(len/4)+1, 末尾 word 存原始长度。
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data: 任意长度(实测16B); key16: 16字节。
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返回: 20B (16B输入时)。
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"""
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n = len(data)
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nwords = (n // 4) + 1
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v = [0] * nwords
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for i in range(n // 4):
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v[i] = struct.unpack("<I", data[i * 4:i * 4 + 4])[0]
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v[nwords - 1] = n # 原始长度
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k = [struct.unpack("<I", key16[i * 4:i * 4 + 4])[0] for i in range(4)]
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_xxtea_encrypt_words(v, k)
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return b"".join(struct.pack("<I", w & 0xFFFFFFFF) for w in v)
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# ---------------------------------------------------------------- nonce
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def pack_u64(v: int) -> bytes:
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"""cred_packlsEm: 8字节小端裸值。"""
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return struct.pack("<Q", v & 0xFFFFFFFFFFFFFFFF)
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def gen_nonce(uid: int, k1: str = K1_DEFAULT,
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service_time_ms: int | None = None,
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counter: int = 0) -> bytes:
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"""按设备算法生成 20B nonce(rnd)。
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uid: 虎牙uid(纯数字, 如1199666914671)
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k1: 设备常量32hex
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service_time_ms: 缺省=当前毫秒时间戳
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counter: 同serviceTime内的递增计数(通常0即可)
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"""
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st = service_time_ms if service_time_ms is not None else int(time.time() * 1000)
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st &= 0x7FFFFFFFFFFF
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nonce_val = (counter & 0xFFFF) | (st << 16)
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data = pack_u64(st) + pack_u64(nonce_val)
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key = hashlib.md5((str(uid) + k1).encode()).hexdigest()[:16].encode()
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return xxtea_encrypt(data, key)
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# ---------------------------------------------------------------- 自检
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if __name__ == "__main__":
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import json
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# 用设备实采数据验证 (成对遍历 xxtea_in/xxtea_out)
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ev = json.load(open("/tmp/opencode/nonce_chain.json"))
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ins = [e for e in ev if e.get("type") == "xxtea_in"]
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outs = [e for e in ev if e.get("type") == "xxtea_out"]
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for idx, e in enumerate(ins):
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data = bytes.fromhex(e["data"]["v"])
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key_str = bytes.fromhex(e["key"]["v"]).decode()
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uid = key_str[:-32]
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k1 = key_str[-32:]
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st = struct.unpack("<Q", data[:8])[0]
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nonce_val = struct.unpack("<Q", data[8:])[0]
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counter = nonce_val & 0xFFFF
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mine = gen_nonce(int(uid), k1, service_time_ms=st, counter=counter)
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real = outs[idx]["out"]["v"]
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print(f"uid={uid} st={st} counter={counter}")
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print(f" 设备: {real}")
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print(f" 复刻: {mine.hex()}")
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print(" MATCH!" if mine.hex() == real else " MISMATCH!!")
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