AES算法可以实现字符串的加解密,本文主要介绍Python、Js(JavaScript)和node.js中实现AES(Crypto)相互加解密,分别通过Python和aes.js实现方法及示例代码。

Python中实现AES(CBC)加密和解密:

安装Crypto:pip install pycrypto

windows中pip install pycryptodome

from Crypto.Cipher  import AES
import base64
BLOCK_SIZE = 16  # Bytes
pad = lambda s: s + (BLOCK_SIZE - len(s) % BLOCK_SIZE) * \
                chr(BLOCK_SIZE - len(s) % BLOCK_SIZE)
unpad = lambda s: s[:-ord(s[len(s) - 1:])]
#python3中
#加密
def AES_Encrypt(key, iv,data):
    data = pad(data)
    # 字符串补位
    cipher = AES.new(key.encode('utf8'), AES.MODE_CBC, iv.encode('utf8'))
    encryptedbytes = cipher.encrypt(data.encode('utf8'))
    # 加密后得到的是bytes类型的数据,使用Base64进行编码,返回byte字符串
    encodestrs = base64.b64encode(encryptedbytes)
    # 对byte字符串按utf-8进行解码
    return encodestrs
#解密
def AES_Decrypt(key,iv, data):
    data = data.encode('utf8')
    encodebytes = base64.decodebytes(data)
    # 将加密数据转换位bytes类型数据
    cipher = AES.new(key.encode('utf8'), AES.MODE_CBC, iv.encode('utf8'))
    text_decrypted = cipher.decrypt(encodebytes)
    # 去补位
    text_decrypted = unpad(text_decrypted)
    text_decrypted = text_decrypted.decode('utf8')
    print(text_decrypted)
    return text_decrypted
#python2中
#加密
def AES_Encrypt(key, iv,data):
    data = pad(data)
    # 字符串补位
    cipher = AES.new(key.encode('utf8'), AES.MODE_CBC, iv.encode('utf8'))
    encryptedbytes = cipher.encrypt(data.encode('utf8'))
    # 加密后得到的是bytes类型的数据,使用Base64进行编码,返回byte字符串
    encodestrs = base64.standard_b64encode(encryptedbytes)
    # 对byte字符串按utf-8进行解码
    return encodestrs
#解密
def AES_Decrypt(key,iv, data):
    data = data.encode('utf8')
    encodebytes = base64.standard_b64decode(data)
    # 将加密数据转换位bytes类型数据
    cipher = AES.new(key.encode('utf8'), AES.MODE_CBC, iv.encode('utf8'))
    text_decrypted = cipher.decrypt(encodebytes)
    # 去补位
    text_decrypted = unpad(text_decrypted)
    text_decrypted = text_decrypted.decode('utf8')
    print(text_decrypted)
    return text_decrypted

测试:

AES_Encrypt("CJAVAPmXcuAksWmF","V33CQ1428SI8ZNMT","137") 
AES_Decrypt("CJAVAPmXcuAksWmF","V33CQ1428SI8ZNMT","v9BxRJX+ojPDhyJFrglcbA==")

注意:CBC加密需要一个十六位的key(密钥)和一个十六位iv(偏移量)ECB加密不需要iv。

JS中实现AES(CBC)加密和解密:

aes.js下载引用地址https://cdnjs.cloudflare.com/ajax/libs/crypto-js/3.1.2/rollups/aes.js

//加密
function encrypt(e,key,iv) {
       var r =  CryptoJS.enc.Utf8.parse(key),
       var n =  CryptoJS.enc.Utf8.parse(iv),
       var  o =  CryptoJS.enc.Utf8.parse(e),
       var u = {
            iv: n,
            mode:  CryptoJS.mode.CBC,
            padding:  CryptoJS.pad.Pkcs7
        },
        i =  CryptoJS.AES.encrypt(o, r, u);
        return i.toString()
 }
//解密
function decrypt(str, key, iv) {
   var r = CryptoJS.enc.Utf8.parse(iv),
   var  n = CryptoJS.enc.Utf8.parse(key),
   var o = CryptoJS.AES.decrypt(e, n, {
        iv: r,
        mode: CryptoJS.mode.CBC,
        padding: CryptoJS.pad.Pkcs7
    });
    return CryptoJS.enc.Utf8.stringify(o).toString()
}

Node.js中实现AES(CBC)加密和解密:

安装cryptonpm install crypto

//加密
function encrypt (data, key, iv) {
    iv = iv || "";
    var clearEncoding = 'utf8';
    var cipherEncoding = 'base64';
    var cipherChunks = [];
    var cipher = crypto.createCipheriv('aes-128-cbc', key, iv);
    cipher.setAutoPadding(true);
    cipherChunks.push(cipher.update(data, clearEncoding, cipherEncoding));
    cipherChunks.push(cipher.final(cipherEncoding));
    return cipherChunks.join('');
}
//解密
function decrypt (data, key, iv) {
    if (!data) {
        return "";
    }
    iv = iv || "";
    var clearEncoding = 'utf8';
    var cipherEncoding = 'base64';
    var cipherChunks = [];
    var decipher = crypto.createDecipheriv('aes-128-cbc', key, iv);
    decipher.setAutoPadding(true);
    cipherChunks.push(decipher.update(data, cipherEncoding, clearEncoding));
    cipherChunks.push(decipher.final(clearEncoding));
    return cipherChunks.join('');
}