Initialize encryption and JavaScript reverse-engineering study repository

Document the project structure and setup while excluding local dependencies and IDE settings.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

对称加密-2026-08-21/2. python实现des加解密.py

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+import base64
+from Crypto.Cipher import DES
+from Crypto.Util.Padding import pad, unpad
+
+
+def des_encrypt(plain_text):
+    cipher = DES.new(des_key, DES.MODE_CBC, iv)
+    encrypted = cipher.encrypt(pad(plain_text.encode("utf-8"), DES.block_size))
+    return base64.b64encode(encrypted)
+
+
+def des_decrypt(cipher_text):
+    cipher = DES.new(des_key, DES.MODE_CBC, iv)
+    decrypt_byte_data = base64.b64decode(cipher_text)
+    decrypted = unpad(cipher.decrypt(decrypt_byte_data), DES.block_size)
+    return decrypted.decode("utf-8")
+
+
+source_data = "你好，世界！"
+des_key = "12345678".encode("utf-8")
+iv = "12345678".encode("utf-8")
+if __name__ == "__main__":
+    enc_data = des_encrypt(source_data)
+    print(enc_data)
+    print(des_decrypt(des_encrypt(source_data)))