一、常用的js加密算法
1、js加密解密算法
对称加密(加密解密密钥相同):DES、DES3、AES
非对称加密(分公钥私钥):RSA
信息摘要算法/签名算法:MD5、HMAC、SHA
2、算法说明
①新浪微博登陆: RSA(非对称加密方式)
登录前先get请求返回携带有token、pubkey、raskv、servertime等信息的dict字符串,包含在js中需要提取转换
需要破解的参数是su和sp,sp是密码<br>
su:是通过封装了RSA源码的一个对象sinaSSOEncoder的base64编码用户名得到的<br>
sp:加密的密码,通过创建sinaSSOEncoder加密对象,公钥是上面返回的pubkey,偏移量"10001"
加密内容是servertime + "\t" + nonce + "\n" + pw
servertime:上面get请求返回的
nonce:上面get请求返回的
pw:输入的密码
②腾讯企鹅媒体:MD5双重加密(信息摘要算法或签名算法)
登录前后台会get请求一次,返回含有token和salf等加密参数信息以及一个cookie,该cookie要加在post的请求中
加密形式:MD5(token + MD5(salt + pwd))双重加密
③网易云获取评论请求参数加密:加密方式AES+RSA
评论请求加密参数是两个:params、encSecKey,传入加密函数的参数是a,b,c,d+内部随机生成的16位参数i
其中a='"{"rid":"R_SO_4_371362","offset":"160","total":"false","limit":"20","csrf_token":"de097d5986487c4aefe9f52c65e43224"}"}'形式参数
rid:歌曲id;
offset:歌词页数计算公式(n-1)*20;
total:在第一页是TRUE在其他是false;
csrf_token:在登陆成功后再返回的cookie中可以找到,未登录时是空。
b、c、d是固定的参数,由js内部定义的文字编码转码并并且得到的类似于
{"色":"00e0b","流感":"509f6","这边":"259df","弱":"8642d","嘴 唇":"bc356","亲":"62901","开心":"477df"}-->色+嘴唇="00e0bbc356"
bcd当做固定参数传入
其中内部随便变量i可以写死,那么encSecKey参数都是由固定参数生成的,可以当做固定参数使用
params根据页数和歌曲参数的不同是变化的
params:是内部方法AES CBC模式
encSecKey:RSA加密
④微信公众号密码加密:加密方式MD5
加密方式比较简单,取密码的前16位进行MD5加密
3、示例代码GitHub地址
https://github.com/dhfjcuff/Python-Crypto
二、Python3实现RSA-AES-MD5-DES-DES3-MD5-SHA-HMAC
GitHub地址:
https://github.com/dhfjcuff/R-A-M-D-D3-S-M-H
内容如下:
# -*- coding:utf-8 -*-
import base64
import rsa
from Crypto.Cipher import AES
from Crypto.PublicKey import RSA
from pyDes import des, CBC, PAD_PKCS5
from Crypto.Cipher import DES3
import hashlib
import hmac
class USE_AES:
"""
AES
除了MODE_SIV模式key长度为:32, 48, or 64,
其余key长度为16, 24 or 32
详细见AES内部文档
CBC模式传入iv参数
本例使用常用的ECB模式
"""
def __init__(self, key):
if len(key) > 32:
key = key[:32]
self.key = self.to_16(key)
def to_16(self, key):
"""
转为16倍数的bytes数据
:param key:
:return:
"""
key = bytes(key, encoding="utf8")
while len(key) % 16 != 0:
key += b'\0'
return key # 返回bytes
def aes(self):
return AES.new(self.key, AES.MODE_ECB) # 初始化加密器
def encrypt(self, text):
aes = self.aes()
return str(base64.encodebytes(aes.encrypt(self.to_16(text))),
encoding='utf8').replace('\n', '') # 加密
def decodebytes(self, text):
aes = self.aes()
return str(aes.decrypt(base64.decodebytes(bytes(
text, encoding='utf8'))).rstrip(b'\0').decode("utf8")) # 解密
class USE_RSA:
"""
生成密钥可保存.pem格式文件
1024位的证书,加密时最大支持117个字节,解密时为128;
2048位的证书,加密时最大支持245个字节,解密时为256。
加密大文件时需要先用AES或者DES加密,再用RSA加密密钥,详细见文档
文档:https://stuvel.eu/files/python-rsa-doc/usage.html#generating-keys
"""
def __init__(self, number=1024):
"""
:param number: 公钥、私钥
"""
self.pubkey, self.privkey = rsa.newkeys(number)
def rsaEncrypt(self, text):
"""
:param test: str
:return: bytes
"""
content = text.encode('utf-8')
crypto = rsa.encrypt(content, self.pubkey)
return crypto
def rsaDecrypt(self, text):
"""
:param text:bytes
:return: str
"""
content = rsa.decrypt(text, self.privkey)
con = content.decode('utf-8')
return con
def savePem(self, path_name, text):
"""
:param path_name: 保存路径
:param text: str
:return:bytes
"""
if "PEM" in path_name.upper():
path_name = path_name[:-4]
with open('{}.pem'.format(path_name), 'bw') as f:
f.write(text.save_pkcs1())
def readPem(self, path_name, key_type):
"""
:param path_name: 密钥文件
:param key_type:类型
:return:
"""
if 'pubkey' in key_type:
self.pubkey = rsa.PublicKey.load_pkcs1(path_name)
else:
self.privkey = rsa.PublicKey.load_pkcs1(path_name)
return True
def sign(self, message, priv_key=None, hash_method='SHA-1'):
"""
生成明文的哈希签名以便还原后对照
:param message: str
:param priv_key:
:param hash_method: 哈希的模式
:return:
"""
if None == priv_key:
priv_key = self.privkey
return rsa.sign(message.encode(), priv_key, hash_method)
def checkSign(self, mess, result, pubkey=None):
"""
验证签名:传入解密后明文、签名、公钥,验证成功返回哈希方法,失败则报错
:param mess: str
:param result: bytes
:param pubkey:
:return: str
"""
if None == pubkey:
pubkey = self.privkey
try:
result = rsa.verify(mess, result, pubkey)
return result
except:
return False
class USE_DES:
"""
des(key,[mode], [IV], [pad], [pad mode])
key:必须正好8字节
mode(模式):ECB、CBC
iv:CBC模式中必须提供长8字节
pad:填充字符
padmode:加密填充模式PAD_NORMAL or PAD_PKCS5
"""
def __init__(self, key, iv):
if not isinstance(key, bytes):
key = bytes(key, encoding="utf8")
if not isinstance(iv, bytes):
iv = bytes(iv, encoding="utf8")
self.key = key
self.iv = iv
def encrypt(self, text):
"""
DES 加密
:param text: 原始字符串
:return: 加密后字符串,bytes
"""
if not isinstance(text, bytes):
text = bytes(text, "utf-8")
secret_key = self.key
iv = self.iv
k = des(secret_key, CBC, iv, pad=None, padmode=PAD_PKCS5)
en = k.encrypt(text, padmode=PAD_PKCS5)
return en
def descrypt(self, text):
"""
DES 解密
:param text: 加密后的字符串,bytes
:return: 解密后的字符串
"""
secret_key = self.key
iv = self.iv
k = des(secret_key, CBC, iv, pad=None, padmode=PAD_PKCS5)
de = k.decrypt(text, padmode=PAD_PKCS5)
return de.decode()
class USE_DES3:
"""
new(key, mode, *args, **kwargs)
key:必须8bytes倍数介于16-24
mode:
iv:初始化向量适用于MODE_CBC、MODE_CFB、MODE_OFB、MODE_OPENPGP,4种模式
``MODE_CBC``, ``MODE_CFB``, and ``MODE_OFB``长度为8bytes
```MODE_OPENPGP```加密时8bytes解密时10bytes
未提供默认随机生成
nonce:仅在 ``MODE_EAX`` and ``MODE_CTR``模式中使用
``MODE_EAX``建议16bytes
``MODE_CTR``建议[0, 7]长度
未提供则随机生成
segment_size:分段大小,仅在 ``MODE_CFB``模式中使用,长度为8倍数,未指定则默认为8
mac_len: 适用``MODE_EAX``模式,身份验证标记的长度(字节),它不能超过8(默认值)
initial_value:适用```MODE_CTR```,计数器的初始值计数器块。默认为**0**。
"""
def __init__(self, key):
self.key = key
self.mode = DES3.MODE_ECB
def encrypt(self, text):
"""
传入明文
:param text:bytes类型,长度是KEY的倍数
:return:
"""
if not isinstance(text, bytes):
text = bytes(text, 'utf-8')
x = len(text) % 8
text = text+b'\0'*x
cryptor = DES3.new(self.key, self.mode)
ciphertext = cryptor.encrypt(text)
return ciphertext
def decrypt(self, text):
cryptor = DES3.new(self.key, self.mode)
plain_text = cryptor.decrypt(text)
st = str(plain_text.decode("utf-8")).rstrip('\0')
return st
def USE_MD5(test):
if not isinstance(test, bytes):
test = bytes(test, 'utf-8')
m = hashlib.md5()
m.update(test)
return m.hexdigest()
def USE_HMAC(key, text):
if not isinstance(key, bytes):
key = bytes(key, 'utf-8')
if not isinstance(text, bytes):
text = bytes(text, 'utf-8')
h = hmac.new(key, text, digestmod='MD5')
return h.hexdigest()
def USE_SHA(text):
if not isinstance(text, bytes):
text = bytes(text, 'utf-8')
sha = hashlib.sha1(text)
encrypts = sha.hexdigest()
return encrypts
if __name__ == '__main__':
aes_test = USE_AES("assssssssdfasasasasa")
a = aes_test.encrypt("测试")
b = aes_test.decodebytes(a)
rsa_test = USE_RSA()
a = rsa_test.rsaEncrypt("测试加密")
b = rsa_test.rsaDecrypt(a)
des_test = USE_DES(b"12345678", b"12345678")
a = des_test.encrypt("测试加密")
b = des_test.descrypt(a)
des3_test = USE_DES3(b"123456789qazxswe")
a = des3_test.encrypt("测试加密")
b = des3_test.decrypt(a)
md5_test = USE_MD5("测试签名")
hmac_test = USE_HMAC("123456", "测试")
sha_test = USE_SHA("测试加密")
三、学习资源推荐
https://lengyue.me/
https://segmentfault.com/a/1190000012359015
https://0x0d.im/archives/javascript-anti-debug-and-obfuscator.html
来源:CSDN
作者:幸福丶如此
链接:https://blog.csdn.net/m0_37886429/article/details/104355404