解密未返回正确的明文[已关闭]

from Crypto.Cipher import AES
from Crypto.Util.Padding import pad, unpad
from Crypto.Random import get_random_bytes

# 生成密钥
key = get_random_bytes(16)

# 加密
def encrypt(plaintext):
    cipher = AES.new(key, AES.MODE_CBC)
    ct_bytes = cipher.encrypt(pad(plaintext.encode('utf-8'), AES.block_size))
    iv = cipher.iv
    return iv + ct_bytes

# 解密
def decrypt(ciphertext):
    iv = ciphertext[:16]
    ct = ciphertext[16:]
    cipher = AES.new(key, AES.MODE_CBC, iv)
    pt = unpad(cipher.decrypt(ct), AES.block_size)
    return pt.decode('utf-8')

# 示例
plaintext = "Hello, World!"
ciphertext = encrypt(plaintext)
print(f"Ciphertext: {ciphertext}")

decrypted_text = decrypt(ciphertext)
print(f"Decrypted text: {decrypted_text}")