mirror of
https://github.com/ihmily/DouyinLiveRecorder.git
synced 2025-12-25 21:36:46 +08:00
455 lines
13 KiB
Python
455 lines
13 KiB
Python
# -*- encoding: utf-8 -*-
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import math
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import time
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def rc4_encrypt(plaintext: str, key: str) -> str:
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# 初始化状态数组
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s = list(range(256))
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# 使用密钥对状态数组进行置换
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j = 0
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for i in range(256):
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j = (j + s[i] + ord(key[i % len(key)])) % 256
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s[i], s[j] = s[j], s[i]
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# 生成密钥流并加密
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i = j = 0
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result = []
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for char in plaintext:
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i = (i + 1) % 256
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j = (j + s[i]) % 256
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s[i], s[j] = s[j], s[i]
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t = (s[i] + s[j]) % 256
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result.append(chr(s[t] ^ ord(char)))
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return ''.join(result)
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def left_rotate(x: int, n: int) -> int:
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n %= 32
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return ((x << n) | (x >> (32 - n))) & 0xFFFFFFFF
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def get_t_j(j: int) -> int:
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if 0 <= j < 16:
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return 2043430169 # 0x79CC4519
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elif 16 <= j < 64:
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return 2055708042 # 0x7A879D8A
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else:
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raise ValueError("invalid j for constant Tj")
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def ff_j(j: int, x: int, y: int, z: int) -> int:
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if 0 <= j < 16:
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return (x ^ y ^ z) & 0xFFFFFFFF
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elif 16 <= j < 64:
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return ((x & y) | (x & z) | (y & z)) & 0xFFFFFFFF
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else:
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raise ValueError("invalid j for bool function FF")
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def gg_j(j: int, x: int, y: int, z: int) -> int:
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if 0 <= j < 16:
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return (x ^ y ^ z) & 0xFFFFFFFF
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elif 16 <= j < 64:
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return ((x & y) | (~x & z)) & 0xFFFFFFFF
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else:
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raise ValueError("invalid j for bool function GG")
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class SM3:
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def __init__(self):
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self.reg = []
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self.chunk = []
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self.size = 0
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self.reset()
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def reset(self):
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# 初始化寄存器值 - 修正为与JS版本相同的值
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self.reg = [
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1937774191, 1226093241, 388252375, 3666478592,
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2842636476, 372324522, 3817729613, 2969243214
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]
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self.chunk = []
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self.size = 0
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def write(self, data):
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# 将输入转换为字节数组
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if isinstance(data, str):
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# 直接转换为UTF-8字节列表
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a = list(data.encode('utf-8'))
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else:
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a = data
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self.size += len(a)
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f = 64 - len(self.chunk)
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if len(a) < f:
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# 如果数据长度小于剩余空间，直接添加
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self.chunk.extend(a)
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else:
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# 否则分块处理
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self.chunk.extend(a[:f])
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while len(self.chunk) >= 64:
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self._compress(self.chunk)
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if f < len(a):
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self.chunk = a[f:min(f + 64, len(a))]
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else:
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self.chunk = []
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f += 64
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def _fill(self):
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# 计算比特长度
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bit_length = 8 * self.size
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# 添加填充位
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padding_pos = len(self.chunk)
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self.chunk.append(0x80)
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padding_pos = (padding_pos + 1) % 64
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# 如果剩余空间不足8字节，则填充到下一个块
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if 64 - padding_pos < 8:
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padding_pos -= 64
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# 填充0直到剩余8字节用于存储长度
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while padding_pos < 56:
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self.chunk.append(0)
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padding_pos += 1
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# 添加消息长度（高32位）
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high_bits = bit_length // 4294967296
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for i in range(4):
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self.chunk.append((high_bits >> (8 * (3 - i))) & 0xFF)
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# 添加消息长度（低32位）
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for i in range(4):
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self.chunk.append((bit_length >> (8 * (3 - i))) & 0xFF)
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def _compress(self, data):
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if len(data) < 64:
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raise ValueError("compress error: not enough data")
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else:
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# 消息扩展
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w = [0] * 132
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# 将字节数组转换为字
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for t in range(16):
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w[t] = (data[4 * t] << 24) | (data[4 * t + 1] << 16) | (data[4 * t + 2] << 8) | data[4 * t + 3]
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w[t] &= 0xFFFFFFFF
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# 消息扩展
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for j in range(16, 68):
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a = w[j - 16] ^ w[j - 9] ^ left_rotate(w[j - 3], 15)
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a = a ^ left_rotate(a, 15) ^ left_rotate(a, 23)
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w[j] = (a ^ left_rotate(w[j - 13], 7) ^ w[j - 6]) & 0xFFFFFFFF
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# 计算w'
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for j in range(64):
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w[j + 68] = (w[j] ^ w[j + 4]) & 0xFFFFFFFF
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# 压缩
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a, b, c, d, e, f, g, h = self.reg
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for j in range(64):
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ss1 = left_rotate((left_rotate(a, 12) + e + left_rotate(get_t_j(j), j)) & 0xFFFFFFFF, 7)
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ss2 = ss1 ^ left_rotate(a, 12)
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tt1 = (ff_j(j, a, b, c) + d + ss2 + w[j + 68]) & 0xFFFFFFFF
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tt2 = (gg_j(j, e, f, g) + h + ss1 + w[j]) & 0xFFFFFFFF
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d = c
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c = left_rotate(b, 9)
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b = a
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a = tt1
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h = g
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g = left_rotate(f, 19)
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f = e
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e = (tt2 ^ left_rotate(tt2, 9) ^ left_rotate(tt2, 17)) & 0xFFFFFFFF
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# 更新寄存器
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self.reg[0] ^= a
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self.reg[1] ^= b
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self.reg[2] ^= c
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self.reg[3] ^= d
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self.reg[4] ^= e
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self.reg[5] ^= f
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self.reg[6] ^= g
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self.reg[7] ^= h
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def sum(self, data=None, output_format=None):
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"""
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计算哈希值
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"""
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# 如果提供了输入，则重置并写入
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if data is not None:
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self.reset()
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self.write(data)
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self._fill()
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# 分块压缩
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for f in range(0, len(self.chunk), 64):
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self._compress(self.chunk[f:f + 64])
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if output_format == 'hex':
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# 十六进制输出
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result = ''.join(f'{val:08x}' for val in self.reg)
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else:
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# 字节数组输出
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result = []
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for f in range(8):
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c = self.reg[f]
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result.append((c >> 24) & 0xFF)
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result.append((c >> 16) & 0xFF)
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result.append((c >> 8) & 0xFF)
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result.append(c & 0xFF)
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self.reset()
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return result
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def result_encrypt(long_str: str, num: str | None = None) -> str:
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# 魔改base64编码表
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encoding_tables = {
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"s0": "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=",
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"s1": "Dkdpgh4ZKsQB80/Mfvw36XI1R25+WUAlEi7NLboqYTOPuzmFjJnryx9HVGcaStCe=",
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"s2": "Dkdpgh4ZKsQB80/Mfvw36XI1R25-WUAlEi7NLboqYTOPuzmFjJnryx9HVGcaStCe=",
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"s3": "ckdp1h4ZKsUB80/Mfvw36XIgR25+WQAlEi7NLboqYTOPuzmFjJnryx9HVGDaStCe",
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"s4": "Dkdpgh2ZmsQB80/MfvV36XI1R45-WUAlEixNLwoqYTOPuzKFjJnry79HbGcaStCe"
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}
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# 位移常量
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masks = [16515072, 258048, 4032, 63] # 对应 0, 1, 2 的掩码，添加63作为第四个掩码
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shifts = [18, 12, 6, 0] # 对应的位移量
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encoding_table = encoding_tables[num]
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result = ""
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round_num = 0
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long_int = get_long_int(round_num, long_str)
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total_chars = math.ceil(len(long_str) / 3 * 4)
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for i in range(total_chars):
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# 每4个字符处理一组3字节
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if i // 4 != round_num:
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round_num += 1
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long_int = get_long_int(round_num, long_str)
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# 计算当前位置的索引
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index = i % 4
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# 使用掩码和位移提取6位值
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char_index = (long_int & masks[index]) >> shifts[index]
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result += encoding_table[char_index]
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return result
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def get_long_int(round_num: int, long_str: str) -> int:
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round_num = round_num * 3
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# 获取字符串中的字符，如果超出范围则使用0
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char1 = ord(long_str[round_num]) if round_num < len(long_str) else 0
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char2 = ord(long_str[round_num + 1]) if round_num + 1 < len(long_str) else 0
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char3 = ord(long_str[round_num + 2]) if round_num + 2 < len(long_str) else 0
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return (char1 << 16) | (char2 << 8) | char3
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def gener_random(random_num: int, option: list[int]) -> list[int]:
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byte1 = random_num & 255
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byte2 = (random_num >> 8) & 255
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return [
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(byte1 & 170) | (option[0] & 85), # 偶数位与option[0]的奇数位合并
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(byte1 & 85) | (option[0] & 170), # 奇数位与option[0]的偶数位合并
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(byte2 & 170) | (option[1] & 85), # 偶数位与option[1]的奇数位合并
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(byte2 & 85) | (option[1] & 170), # 奇数位与option[1]的偶数位合并
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]
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def generate_random_str() -> str:
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"""
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生成随机字符串
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Returns:
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随机字符串
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"""
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# 使用与JS版本相同的固定随机值
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random_values = [0.123456789, 0.987654321, 0.555555555]
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# 生成三组随机字节并合并
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random_bytes = []
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random_bytes.extend(gener_random(int(random_values[0] * 10000), [3, 45]))
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random_bytes.extend(gener_random(int(random_values[1] * 10000), [1, 0]))
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random_bytes.extend(gener_random(int(random_values[2] * 10000), [1, 5]))
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return ''.join(chr(b) for b in random_bytes)
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def generate_rc4_bb_str(url_search_params: str, user_agent: str, window_env_str: str,
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suffix: str = "cus", arguments: list[int] | None = None) -> str:
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if arguments is None:
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arguments = [0, 1, 14]
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sm3 = SM3()
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start_time = int(time.time() * 1000)
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# 三次加密处理
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# 1: url_search_params两次sm3之的结果
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url_search_params_list = sm3.sum(sm3.sum(url_search_params + suffix))
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# 2: 对后缀两次sm3之的结果
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cus = sm3.sum(sm3.sum(suffix))
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# 3: 对ua处理之后的结果
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ua_key = chr(0) + chr(1) + chr(14) # [1/256, 1, 14]
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ua = sm3.sum(result_encrypt(
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rc4_encrypt(user_agent, ua_key),
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"s3"
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))
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end_time = start_time + 100
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# 构建配置对象
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b = {
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8: 3,
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10: end_time,
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15: {
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"aid": 6383,
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"pageId": 110624,
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"boe": False,
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"ddrt": 7,
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"paths": {
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"include": [{} for _ in range(7)],
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"exclude": []
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},
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"track": {
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"mode": 0,
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"delay": 300,
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"paths": []
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},
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"dump": True,
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"rpU": "hwj"
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},
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16: start_time,
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18: 44,
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19: [1, 0, 1, 5],
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}
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def split_to_bytes(num: int) -> list[int]:
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return [
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(num >> 24) & 255,
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(num >> 16) & 255,
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(num >> 8) & 255,
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num & 255
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]
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# 处理时间戳
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start_time_bytes = split_to_bytes(b[16])
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b[20] = start_time_bytes[0]
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b[21] = start_time_bytes[1]
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b[22] = start_time_bytes[2]
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b[23] = start_time_bytes[3]
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b[24] = int(b[16] / 256 / 256 / 256 / 256) & 255
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b[25] = int(b[16] / 256 / 256 / 256 / 256 / 256) & 255
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# 处理Arguments参数
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arg0_bytes = split_to_bytes(arguments[0])
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b[26] = arg0_bytes[0]
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b[27] = arg0_bytes[1]
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b[28] = arg0_bytes[2]
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b[29] = arg0_bytes[3]
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b[30] = int(arguments[1] / 256) & 255
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b[31] = (arguments[1] % 256) & 255
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arg1_bytes = split_to_bytes(arguments[1])
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b[32] = arg1_bytes[0]
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b[33] = arg1_bytes[1]
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arg2_bytes = split_to_bytes(arguments[2])
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b[34] = arg2_bytes[0]
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b[35] = arg2_bytes[1]
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b[36] = arg2_bytes[2]
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b[37] = arg2_bytes[3]
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# 处理加密结果
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b[38] = url_search_params_list[21]
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b[39] = url_search_params_list[22]
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b[40] = cus[21]
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b[41] = cus[22]
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b[42] = ua[23]
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b[43] = ua[24]
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# 处理结束时间
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end_time_bytes = split_to_bytes(b[10])
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b[44] = end_time_bytes[0]
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b[45] = end_time_bytes[1]
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b[46] = end_time_bytes[2]
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b[47] = end_time_bytes[3]
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b[48] = b[8]
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b[49] = int(b[10] / 256 / 256 / 256 / 256) & 255
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b[50] = int(b[10] / 256 / 256 / 256 / 256 / 256) & 255
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# 处理配置项
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b[51] = b[15]['pageId']
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page_id_bytes = split_to_bytes(b[15]['pageId'])
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b[52] = page_id_bytes[0]
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b[53] = page_id_bytes[1]
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b[54] = page_id_bytes[2]
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b[55] = page_id_bytes[3]
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b[56] = b[15]['aid']
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b[57] = b[15]['aid'] & 255
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b[58] = (b[15]['aid'] >> 8) & 255
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b[59] = (b[15]['aid'] >> 16) & 255
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b[60] = (b[15]['aid'] >> 24) & 255
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# 处理环境信息
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window_env_list = [ord(char) for char in window_env_str]
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b[64] = len(window_env_list)
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b[65] = b[64] & 255
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b[66] = (b[64] >> 8) & 255
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b[69] = 0
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b[70] = 0
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b[71] = 0
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# 计算校验和
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b[72] = b[18] ^ b[20] ^ b[26] ^ b[30] ^ b[38] ^ b[40] ^ b[42] ^ b[21] ^ b[27] ^ b[31] ^ \
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b[35] ^ b[39] ^ b[41] ^ b[43] ^ b[22] ^ b[28] ^ b[32] ^ b[36] ^ b[23] ^ b[29] ^ \
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b[33] ^ b[37] ^ b[44] ^ b[45] ^ b[46] ^ b[47] ^ b[48] ^ b[49] ^ b[50] ^ b[24] ^ \
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b[25] ^ b[52] ^ b[53] ^ b[54] ^ b[55] ^ b[57] ^ b[58] ^ b[59] ^ b[60] ^ b[65] ^ \
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b[66] ^ b[70] ^ b[71]
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# 构建最终字节数组
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bb = [
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b[18], b[20], b[52], b[26], b[30], b[34], b[58], b[38], b[40], b[53], b[42], b[21],
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b[27], b[54], b[55], b[31], b[35], b[57], b[39], b[41], b[43], b[22], b[28], b[32],
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b[60], b[36], b[23], b[29], b[33], b[37], b[44], b[45], b[59], b[46], b[47], b[48],
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b[49], b[50], b[24], b[25], b[65], b[66], b[70], b[71]
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]
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bb.extend(window_env_list)
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bb.append(b[72])
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return rc4_encrypt(
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''.join(chr(byte) for byte in bb),
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chr(121)
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)
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def ab_sign(url_search_params: str, user_agent: str) -> str:
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window_env_str = "1920|1080|1920|1040|0|30|0|0|1872|92|1920|1040|1857|92|1|24|Win32"
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# 1. 生成随机字符串前缀
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# 2. 生成RC4加密的主体部分
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# 3. 对结果进行最终加密并添加等号后缀
|
||
return result_encrypt(
|
||
generate_random_str() +
|
||
generate_rc4_bb_str(url_search_params, user_agent, window_env_str),
|
||
"s4"
|
||
) + "="
|