Huge Rewrite!

Standalone/DecryptHDD.py

@@ -0,0 +1,71 @@
+# 解密从 HDD 抓包得到的数据
+# 兼容 PRiSM 和 CN 2024
+
+# 完全 Standalone，不依赖于其他文件
+
+import base64
+import zlib
+from Crypto.Cipher import AES
+from Crypto.Util.Padding import unpad, pad
+
+# 密钥和 IV
+# CN 2024
+aesKey2024 = "n7bx6:@Fg_:2;5E89Phy7AyIcpxEQ:R@"
+aesIV2024 = ";;KjR1C3hgB1ovXa"
+
+# 国际服 PRiSM
+aesKeyPrism = "A;mv5YUpHBK3YxTy5KB^[;5]C2AL50Bq"
+aesIVPrism = "9FM:sd9xA91X14v]"
+
+class AESPKCS7:
+    # 实现了 maimai 通讯所用的 AES 加密的类
+    def __init__(self, key: str, iv: str):
+        self.key = key.encode('utf-8')
+        self.iv = iv.encode('utf-8')
+        self.mode = AES.MODE_CBC
+    # 加密
+    def encrypt(self, content: bytes) -> bytes:
+        cipher = AES.new(self.key, self.mode, self.iv)
+        content_padded = pad(content, AES.block_size)
+        encrypted_bytes = cipher.encrypt(content_padded)
+        return encrypted_bytes
+    # 解密
+    def decrypt(self, encrypted_content: bytes) -> str:
+        cipher = AES.new(self.key, self.mode, self.iv)
+        decrypted_padded = cipher.decrypt(encrypted_content)
+        decrypted = unpad(decrypted_padded, AES.block_size)
+        return decrypted
+
+def main_sdga():
+    # 填入你的想解密的数据的 base64 编码
+    base64_encoded_data = "KSGm2qo7qVHz1wrK15PckYC5/kLjKcTtEXOgHeHt1Xn6DPdo3pltoPLADHpe8+Wq"
+
+    aes = AESPKCS7(aesKeyPrism, aesIVPrism)
+
+    # 首先解码 base64
+    decodedData = base64.b64decode(base64_encoded_data)
+    # 然后解密数据，PRiSM 是先压缩再加密（which is 正确做法）
+    decryptedData = aes.decrypt(decodedData)
+    # 解压数据
+    decompressedData = zlib.decompress(decryptedData)
+    
+    print(str(decompressedData))
+
+def main_sdgb():
+    # 填入你的想解密的数据的 base64 编码
+    base64_encoded_data = "eJyrTVvpuGwCR32OdodwtVXZ7/Ofmfhin7k/K61q3XNoad1rAPGwECU="
+
+    aes = AESPKCS7(aesKey2024, aesIV2024)
+
+    # 首先解码 base64
+    decodedData = base64.b64decode(base64_encoded_data)
+    # 然后解压数据，CN 2024 是加密后再压缩（纯傻逼
+    decompressedData = zlib.decompress(decodedData)
+    # 最后解密数据
+    decryptedData = aes.decrypt(decompressedData)
+
+    print(str(decryptedData))
+
+
+if __name__ == "__main__":
+    main_sdga()