python3 AES 加解密

#coding:utf-8
import base64
from Crypto.Cipher import AES     #注：python3 安装 Crypto 是 pip3 install -i https://pypi.tuna.tsinghua.edu.cn/simple pycryptodome


#解密
def aes_decode(data, key):
    try:
        aes = AES.new(str.encode(key), AES.MODE_ECB)  # 初始化加密器
        decrypted_text = aes.decrypt(base64.decodebytes(bytes(data, encoding='utf8'))).decode("utf8")  # 解密
        decrypted_text = decrypted_text[:-ord(decrypted_text[-1])]  # 去除多余补位
    except Exception as e:
        pass
    return decrypted_text

#加密
def aes_encode(data, key):
    while len(data) % 16 != 0:     # 补足字符串长度为16的倍数
        data += (16 - len(data) % 16) * chr(16 - len(data) % 16)
    data = str.encode(data)
    aes = AES.new(str.encode(key), AES.MODE_ECB)  # 初始化加密器
    return str(base64.encodebytes(aes.encrypt(data)), encoding='utf8').replace('
', '')  # 加密

if __name__ == '__main__':
    key = '12345678g01234ab'  # 密钥长度必须为16、24或32位，分别对应AES-128、AES-192和AES-256
    data = "E83A56F6BCF88E5BD3600C398E39EAAFA91DBA24807B73F7B76FF1E180CEA14DAED6A43F9304901044C50503198C2D3A57661"    # 待加密文本
    
    mi = aes_encode(data,key)
    print("加密值：",mi)
    print("解密值：",aes_decode(mi,key))

　　案例2：

#coding:utf-8
import base64
from Crypto.Cipher import AES       #注：python3 安装 Crypto 是 pip3 install -i https://pypi.tuna.tsinghua.edu.cn/simple pycryptodome


def pkcs7padding(text):
    """
    明文使用PKCS7填充
    最终调用AES加密方法时，传入的是一个byte数组，要求是16的整数倍，因此需要对明文进行处理
    :param text: 待加密内容(明文)
    :return:
    """
    bs = AES.block_size  # 16
    length = len(text)
    bytes_length = len(bytes(text, encoding='utf-8'))
    # tips：utf-8编码时，英文占1个byte，而中文占3个byte
    padding_size = length if(bytes_length == length) else bytes_length
    padding = bs - padding_size % bs
    # tips：chr(padding)看与其它语言的约定，有的会使用''
    padding_text = chr(padding) * padding
    return text + padding_text


def pkcs7unpadding(text):
    """
    处理使用PKCS7填充过的数据
    :param text: 解密后的字符串
    :return:
    """
    try:
        length = len(text)
        unpadding = ord(text[length-1])
        return text[0:length-unpadding]
    except Exception as e:
        pass


def aes_encode(key, content):
    """
    AES加密
    key,iv使用同一个
    模式cbc
    填充pkcs7
    :param key: 密钥
    :param content: 加密内容
    :return:
    """
    key_bytes = bytes(key, encoding='utf-8')
    iv = key_bytes
    cipher = AES.new(key_bytes, AES.MODE_CBC, iv)
    # 处理明文
    content_padding = pkcs7padding(content)
    # 加密
    aes_encode_bytes = cipher.encrypt(bytes(content_padding, encoding='utf-8'))
    # 重新编码
    result = str(base64.b64encode(aes_encode_bytes), encoding='utf-8')
    return result


def aes_decode(key, content):
    """
    AES解密
     key,iv使用同一个
    模式cbc
    去填充pkcs7
    :param key:
    :param content:
    :return:
    """
    try:
        key_bytes = bytes(key, encoding='utf-8')
        iv = key_bytes
        cipher = AES.new(key_bytes, AES.MODE_CBC, iv)
        # base64解码
        aes_encode_bytes = base64.b64decode(content)
        # 解密
        aes_decode_bytes = cipher.decrypt(aes_encode_bytes)
        # 重新编码
        result = str(aes_decode_bytes, encoding='utf-8')
        # 去除填充内容
        result = pkcs7unpadding(result)
    except Exception as e:
        pass
    if result == None:
        return ""
    else:
        return result





key = '12345678g01234ab'

# 对英文加密
data = 'Hello!'
mi = aes_encode(key, data)
print(mi)
# 解密
print(aes_decode(key, mi))


# 中英文混合加密
data = 'Hello, 韩- 梅 -梅'
aes_encode_mixed = aes_encode(key, data)
print(aes_encode_mixed)
# 解密
print(aes_decode(key, aes_encode_mixed))