爬虫逆向学习(四)：python与Javascript方式处理常见加解密

在线加解密工具

国密SM系列

SM2

JavaScript实现

const sm2 = require('sm-crypto').sm2
const cipherMode = 1
// 获取密钥对
let keypair = sm2.generateKeyPairHex()
let publicKey = keypair.publicKey   // 公钥
let privateKey = keypair.privateKey // 私钥

let msgString = "this is the data to be encrypted"
let encryptData = sm2.doEncrypt(msgString, publicKey, cipherMode)    // 加密结果
let decryptData = sm2.doDecrypt(encryptData, privateKey, cipherMode) // 解密结果
console.log("encryptData: ", encryptData)
console.log("decryptData: ", decryptData)

python实现

from gmssl import sm2
 
# 16 进制的公钥和私钥
private_key = '私钥'
public_key = '公钥'
sm2_crypt = sm2.CryptSM2(public_key=public_key, private_key=private_key)
 
# 待加密数据和加密后数据为 bytes 类型
data = b"this is the data to be encrypted"
enc_data = sm2_crypt.encrypt(data)
dec_data = sm2_crypt.decrypt(enc_data)
 
print('enc_data: ', enc_data.hex())
print('dec_data: ', dec_data)

SM4

JavaScript实现

var sKey = "JeF38U9wT9wlMfs2";
var sm4 = new JSSM4(sKey);
function SM4_decrypt(text) {
  let dedata = sm4.decryptData_ECB(text);
  return dedata;
}
function SM4_encrypt(text) {
  let endata = sm4.encryptData_ECB(text);
  return endata;
}
 
let str = "我是一段加密文本";
str = SM4_encrypt(str);
console.log("加密结果", str);
str = SM4_decrypt(str);
console.log("解密结果", str);

python实现

import binascii
from gmssl import sm4


class SM4:
    """
    国产加密 sm4加解密
    """

    def __init__(self):
        self.crypt_sm4 = sm4.CryptSM4()  # 实例化

    def str_to_hexStr(self, hex_str):
        """
        字符串转hex
        :param hex_str: 字符串
        :return: hex
        """
        hex_data = hex_str.encode('utf-8')
        str_bin = binascii.unhexlify(hex_data)
        return str_bin.decode('utf-8')

    def encryptSM4(self, encrypt_key, value):
        """
        国密sm4加密
        :param encrypt_key: sm4加密key
        :param value: 待加密的字符串
        :return: sm4加密后的十六进制值
        """
        crypt_sm4 = self.crypt_sm4
        crypt_sm4.set_key(encrypt_key.encode(), sm4.SM4_ENCRYPT)  # 设置密钥
        date_str = str(value)
        encrypt_value = crypt_sm4.crypt_ecb(date_str.encode())  # 开始加密。bytes类型
        return encrypt_value.hex()  # 返回十六进制值

    def decryptSM4(self, decrypt_key, encrypt_value):
        """
        国密sm4解密
        :param decrypt_key:sm4加密key
        :param encrypt_value: 待解密的十六进制值
        :return: 原字符串
        """
        crypt_sm4 = self.crypt_sm4
        crypt_sm4.set_key(decrypt_key.encode(), sm4.SM4_DECRYPT)  # 设置密钥
        decrypt_value = crypt_sm4.crypt_ecb(bytes.fromhex(encrypt_value))  # 开始解密。十六进制类型
        return decrypt_value.decode()


if __name__ == '__main__':
    key = "f38fc9b32af486e65d6f93dbc41b9123"
    strData = "90897h8789thvht"
    SM4 = SM4()
    print("原字符：", strData)
    encData = SM4.encryptSM4(key, strData)  # 加密后的数据，返回bytes类型
    print("sm4加密结果：", encData)
    decData = SM4.decryptSM4(key, encData)
    print("sm4解密结果：", decData)  # 解密后的数据

MD5

JavaScript实现

var CryptoJS = require('crypto-js')

function MD5Test() {
    var text = "I love python!"
    return CryptoJS.MD5(text).toString()
}

console.log(MD5Test()) 

python实现

import hashlib

def md5_test2():
    md5 = hashlib.md5()
    md5.update('python'.encode('utf-8'))
    print(md5.hexdigest())

if __name__ == '__main__':
    md5_test2() 

SHA

JavaScript实现

// 引用 crypto-js 加密模块
var CryptoJS = require('crypto-js')

function SHA1Encrypt() {
    var text = "I love python!"
    return CryptoJS.SHA1(text).toString();
}

console.log(SHA1Encrypt()) 

python实现

import hashlib

def sha1_test2():
    sha1 = hashlib.sha1()
    sha1.update('I love python!'.encode('utf-8'))
    print(sha1.hexdigest())

if __name__ == '__main__':
    sha1_test2() 

HMAC

JavaScript实现

var CryptoJS = require('crypto-js')

function HMACEncrypt() {
    var text = "I love python!"
    var key = "secret"   // 密钥文件
    return CryptoJS.HmacMD5(text, key).toString();
    // return CryptoJS.HmacSHA1(text, key).toString();
    // return CryptoJS.HmacSHA256(text, key).toString();
}
console.log(HMACEncrypt())

python实现

import hmac

def hmac_test1():
    message = b'I love python!'
    key = b'secret'
    md5 = hmac.new(key, message, digestmod='MD5')
    print(md5.hexdigest())


def hmac_test2():
    key = 'secret'.encode('utf8')
    sha1 = hmac.new(key, digestmod='sha1')
    sha1.update('I love '.encode('utf8'))
    sha1.update('Python!'.encode('utf8'))
    print(sha1.hexdigest())

if __name__ == '__main__':
    hmac_test1()  # 9c503a1f852edcc3526ea56976c38edf
    hmac_test2()  # 2d8449a4292d4bbeed99ce9ea570880d6e19b61a

DES

JavaScript实现

var CryptoJS = require('crypto-js')

function desEncrypt() {
    var key = CryptoJS.enc.Utf8.parse(desKey),
        iv = CryptoJS.enc.Utf8.parse(desIv),
        srcs = CryptoJS.enc.Utf8.parse(text),
        // CBC 加密模式，Pkcs7 填充方式
        encrypted = CryptoJS.DES.encrypt(srcs, key, {
            iv: iv,
            mode: CryptoJS.mode.CBC,
            padding: CryptoJS.pad.Pkcs7
        });
    return encrypted.toString();
}

function desDecrypt() {
    var key = CryptoJS.enc.Utf8.parse(desKey),
        iv = CryptoJS.enc.Utf8.parse(desIv),
        srcs = encryptedData,
        // CBC 加密模式，Pkcs7 填充方式
        decrypted = CryptoJS.DES.decrypt(srcs, key, {
            iv: iv,
            mode: CryptoJS.mode.CBC,
            padding: CryptoJS.pad.Pkcs7
        });
    return decrypted.toString(CryptoJS.enc.Utf8);
}

var text = "I love Python!"       // 待加密对象
var desKey = "6f726c64f2c2057"    // 密钥
var desIv = "0123456789ABCDEF"    // 初始向量

var encryptedData = desEncrypt()
var decryptedData = desDecrypt()

console.log("加密字符串: ", encryptedData)
console.log("解密字符串: ", decryptedData)

python实现

import binascii
from pyDes import des, CBC, PAD_PKCS5

def des_encrypt(key, text, iv):
    k = des(key, CBC, iv, pad=None, padmode=PAD_PKCS5)
    en = k.encrypt(text, padmode=PAD_PKCS5)
    return binascii.b2a_hex(en)

def des_decrypt(key, text, iv):
    k = des(key, CBC, iv, pad=None, padmode=PAD_PKCS5)
    de = k.decrypt(binascii.a2b_hex(text), padmode=PAD_PKCS5)
    return de

if __name__ == '__main__':
    secret_key = '12345678'   # 密钥
    text = 'hello world'   # 加密对象
    iv = secret_key           # 偏移量
    secret_str = des_encrypt(secret_key, text, iv)
    print('加密字符串：', secret_str)
    clear_str = des_decrypt(secret_key, secret_str, iv)
    print('解密字符串：', clear_str)

AES

JavaScript实现

var CryptoJS = require('crypto-js')

function tripleAesEncrypt() {
    var key = CryptoJS.enc.Utf8.parse(aesKey),
        iv = CryptoJS.enc.Utf8.parse(aesIv),
        srcs = CryptoJS.enc.Utf8.parse(text),
        // CBC 加密方式，Pkcs7 填充方式
        encrypted = CryptoJS.AES.encrypt(srcs, key, {
            iv: iv,
            mode: CryptoJS.mode.CBC,
            padding: CryptoJS.pad.Pkcs7
        });
    return encrypted.toString();
}

function tripleAesDecrypt() {
    var key = CryptoJS.enc.Utf8.parse(aesKey),
        iv = CryptoJS.enc.Utf8.parse(aesIv),
        srcs = encryptedData,
        // CBC 加密方式，Pkcs7 填充方式
        decrypted = CryptoJS.AES.decrypt(srcs, key, {
            iv: iv,
            mode: CryptoJS.mode.CBC,
            padding: CryptoJS.pad.Pkcs7
        });
    return decrypted.toString(CryptoJS.enc.Utf8);
}

var text = "I love Python!"       // 待加密对象
var aesKey = "6f726c64f2c2057c"   // 密钥，16 倍数
var aesIv = "0123456789ABCDEF"    // 偏移量，16 倍数

var encryptedData = tripleAesEncrypt()
var decryptedData = tripleAesDecrypt()

console.log("加密字符串: ", encryptedData)
console.log("解密字符串: ", decryptedData)

python实现

import base64
import hashlib
from Crypto.Cipher import AES
from Crypto.Util.Padding import pad, unpad


class AESCipher(object):
    """ 进行 aes 加密 解密 """

    def __init__(self, key, model='ECB', iv=''):
        self.mode = model
        self.key = key.encode('utf-8')
        self.iv = iv.encode()
        if model == 'ECB':
            self.aes = AES.new(self.key, AES.MODE_ECB)  # 创建一个aes对象
        elif model == 'CBC':
            self.aes = AES.new(self.key, AES.MODE_CBC, self.iv)

    def add_16(self, par):
        # python3字符串是unicode编码，需要 encode才可以转换成字节型数据
        par = par.encode('utf-8')
        while len(par) % 16 != 0:
            par += b'\x00'
        return par

    def encrypt(self, data):
        # pad_pkcs7 = pad(data.encode('utf-8'), AES.block_size, style='pkcs7')
        pad_pkcs7 = pad(data.encode('utf-8'), AES.block_size, style='pkcs7')
        result = base64.encodebytes(self.aes.encrypt(pad_pkcs7))
        encrypted_text = str(result, encoding='utf-8').replace('\n', '')
        return encrypted_text

    def decrypt(self, data):
        base64_decrypted = base64.decodebytes(data.encode('utf-8'))
        una_pkcs7 = unpad(self.aes.decrypt(base64_decrypted), AES.block_size, style='pkcs7')
        decrypted_text = str(una_pkcs7, encoding='utf-8')
        return decrypted_text

RSA

JavaScript实现

var NodeRSA = require('node-rsa');

function rsaEncrypt() {
    pubKey = new NodeRSA(publicKey,'pkcs8-public');
    var encryptedData = pubKey.encrypt(text, 'base64');
    return encryptedData
}

function rsaDecrypt() {
    priKey = new NodeRSA(privatekey,'pkcs8-private');
    var decryptedData = priKey.decrypt(encryptedData, 'utf8');
    return decryptedData
}

var key = new NodeRSA({b: 512});                    //生成512位秘钥
var publicKey = key.exportKey('pkcs8-public');    //导出公钥
var privatekey = key.exportKey('pkcs8-private');  //导出私钥
var text = "I love Python!"

var encryptedData = rsaEncrypt()
var decryptedData = rsaDecrypt()

console.log("公钥:\n", publicKey)
console.log("私钥:\n", privatekey)
console.log("加密字符串: ", encryptedData)
console.log("解密字符串: ", decryptedData)

python实现

import rsa
import base64

def rsa_encrypt(pu_key, t):
    # 公钥加密
    rsas = rsa.encrypt(t.encode("utf-8"), pu_key)
    return base64.b64encode(rsas)

def rsa_decrypt(pr_key, t):
    # 私钥解密
    rsas = rsa.decrypt(base64.b64decode(t), pr_key).decode("utf-8")
    return rsas

if __name__ == "__main__":
    public_key, private_key = rsa.newkeys(512)   # 生成公钥、私钥
    print('公钥：', public_key)
    print('私钥：', private_key)
    text = 'I love Python!'  # 加密对象
    encrypted_str = rsa_encrypt(public_key, text)
    print('加密字符串：', encrypted_str)
    decrypted_str = rsa_decrypt(private_key, encrypted_str)
    print('解密字符串：', decrypted_str)

通过已有公钥对文本进行加密

def rsa_encrypt(self, public_key, encrypt_text):
    # 将Base64编码的公钥解码为RSA公钥
    key_data = base64.b64decode(public_key)
    key = RSA.importKey(key_data)
    # 使用RSA公钥加密明文密码
    encryptor = PKCS1_OAEP.new(key)
    encryptPassword = encryptor.encrypt(encrypt_text.encode())
    # 打印加密后的密文密码
    return base64.b64encode(encryptPassword).decode()