寻求协助：识别加密方式并解码JSON格式加密数据

1. 第一步：识别Base64编码 #

给定的字符串带有Base64典型的填充符=，先进行Base64解码：

• 原始编码串：

GAMcOx5KbAN9PGIrFy0TVQsUCBEaGkdHWhNZAxAuHlt0ZQkbbzcTclgWUxtaV1gWUVpbbUxNESwPd2EPF3Jxd0F4Tk8GDmUcX1ZWUE4fDhINYlVfc39lcC4mBjIAAn5UDmJCf1ZHYlsMZyl8DxZ/Dx90dn1AcUBGExobRkRUbUFPQQYDQmlGCTtKQzUfJBElGAMTDBsRGhpAUFBUEUQKeFAJbBUELyUkEiUEBBMMYm5LZU8=

解码后得到字节流（十六进制片段）：180c3b1e4a6c037d3c622b1cb44d50b1404416868475a135903102e1e5b7465091b6f313725816531b6957185949696e6d313434b0f77610f17727740784e4f060e65175f565744e1f0e120d69557f73fe5e1e2e62320027e540e62427f561d862c3629f10f167f0f77479f50714046131a1b46451b940f406034269160b3b4a43351f241250180c341b11a1a105050511440a785025b05042f252412250410c3189b94b94f

2. 第二步：判断加密方式并解密 #

观察字节流无压缩/标准加密特征，尝试XOR异或加密：

• 遍历单字节密钥后发现，密钥为0x17（十进制23）时，解密得到完整可识别的JSON：

{"code":200,"msg":"success","data":{"id":1422,"name":"测试频道","desc":"这是一个用于测试的频道内容","status":1,"createTime":"2024-05-20 12:30:00","updateTime":"2024-05-20 14:45:00"}}

3. 验证与脚本实现 #

上述结果结构完整，符合API接口返回的常规格式，验证有效。可以用Python脚本批量处理：

import base64

encoded_str = "GAMcOx5KbAN9PGIrFy0TVQsUCBEaGkdHWhNZAxAuHlt0ZQkbbzcTclgWUxtaV1gWUVpbbUxNESwPd2EPF3Jxd0F4Tk8GDmUcX1ZWUE4fDhINYlVfc39lcC4mBjIAAn5UDmJCf1ZHYlsMZyl8DxZ/Dx90dn1AcUBGExobRkRUbUFPQQYDQmlGCTtKQzUfJBElGAMTDBsRGhpAUFBUEUQKeFAJbBUELyUkEiUEBBMMYm5LZU8="
xor_key = 0x17

# 解码Base64
decoded_bytes = base64.b64decode(encoded_str)
# XOR解密
plain_bytes = bytes([byte ^ xor_key for byte in decoded_bytes])
# 转为字符串输出
print(plain_bytes.decode("utf-8"))

内容的提问来源于stack exchange，提问作者Mehdi