消息推送系统

from Crypto.Cipher import AES

from base64 import b64encode, b64decode

class SecureMessage:

def __init__(self, key):

self.key = key.encode('utf-8')

def encrypt(self, message):

cipher = AES.new(self.key, AES.MODE_EAX)

ciphertext, tag = cipher.encrypt_and_digest(message.encode('utf-8'))

return b64encode(cipher.nonce + tag + ciphertext).decode('utf-8')

def decrypt(self, encrypted_message):

decoded_message = b64decode(encrypted_message)

nonce = decoded_message[:16]

tag = decoded_message[16:32]

ciphertext = decoded_message[32:]

cipher = AES.new(self.key, AES.MODE_EAX, nonce=nonce)

decrypted_message = cipher.decrypt_and_verify(ciphertext, tag)

return decrypted_message.decode('utf-8')

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from pptx import Presentation

def read_pptx(file_path):

presentation = Presentation(file_path)

for slide in presentation.slides:

for shape in slide.shapes:

if hasattr(shape, "text"):

print(shape.text)

校友管理系统

def save_pptx(presentation, file_path):

presentation.save(file_path)

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