编程语言
首页 > 编程语言> > python中的RSA加密和JS中的解密

python中的RSA加密和JS中的解密

作者:互联网

我是密码学的全新人物.我想从服务器端生成RSA密钥对,并将其发送给所有客户端(浏览器).但在此之前,我只是通过加密python中的数据并通过pubnub发送到index.html文件并尝试在JavaScript中解密来测试场景.问题是当我做加密时;

random_generator = Random.new().read
key = RSA.generate(1024, random_generator)
print key.exportKey() #<--private key
public_key = key.publickey()
print public_key.exportKey() #<--public key
msg = "hello"
enc_data = public_key.encrypt(msg, 32)
print '----ENCRYPTED DATA----'
enc = enc_data[0] 

并发送加密数据enc,它给我这个错误:

UnicodeDecodeError: 'utf8' codec can't decode byte 0xc4 in position 2: invalid continuation byte

我试着把它转换成

enc = base64.b64encode(enc_data[0])

它发送没有错误.但JS解密方法获取无

  var enc_from_python = $('#input').val();
  console.log("ENCRYPTED data:", enc_from_python);
  var decrypt = new JSEncrypt();
  decrypt.setPrivateKey($('#privkey').val());
  var uncrypted = decrypt.decrypt(enc_from_python);
  console.log(">>>",uncrypted);  //<-- this is None ! why ?

这两个代码都可以自己进行加/减.我还尝试使用python中收到的密钥对来加密/解析JS中的数据,这很有效.我想问题是来自Pycrypto的编码数据的unicode编码格式不匹配.谁能告诉我在这里我错过了什么.

Python的完整代码:

import time
from pubnub.pnconfiguration import PNConfiguration
from pubnub.pubnub import PubNub

from Crypto.PublicKey import RSA
from Crypto import Random
import base64

pnconfig = PNConfiguration()
pnconfig.subscribe_key = 'demo'
pnconfig.publish_key = 'demo'
channel = "my_channel" 
pubnub = PubNub(pnconfig)

def my_publish_callback(envelope, status):
    if not status.is_error():
        pass  # Message successfully published to specified channel.
    else:
        pass  # Handle message publish error. Check 'category' property to find out possible issue


time.sleep(1)
random_generator = Random.new().read
key = RSA.generate(1024, random_generator)
print key.exportKey() #<--private key
public_key = key.publickey()
print public_key.exportKey() #<--public key
msg = "hello"
enc_data = public_key.encrypt(msg, 32)
print '----ENCRYPTED DATA----'
#enc = enc_data[0]
enc = base64.b64encode(enc_data[0])

print enc        
#print type(enc_data[0])
print '----ENCRYPTED DATA----'
print  ''
print '----DECRYPTED DATA begin----'
print key.decrypt(enc_data[0])
print '----DECRYPTED DATA end----'      

pubnub.publish().channel(channel).message({"data": enc , "private": (key.exportKey()), "public" : (public_key.exportKey())}).async(my_publish_callback)         

和完整的JS代码是;

<!doctype html>
<html>
  <head>
    <title>JavaScript RSA Encryption</title>
    <script src="http://code.jquery.com/jquery-1.8.3.min.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/jsencrypt/2.3.1/jsencrypt.min.js"></script>
    <script src="https://cdn.pubnub.com/sdk/javascript/pubnub.4.12.0.min.js"></script>
    <script type="text/javascript">

      // Call this code when the page is done loading.
      $(function() {
        pubnub = new PubNub({
          publish_key: 'demo',
          subscribe_key: 'demo'
        });  

        pubnub.subscribe({
            channels: ['my_channel']
        }); 

    pubnub.addListener({
        message: function(message) {
            var msg = message.message;
            console.log("msg:" + JSON.stringify(msg));

             if (msg.private){
                $("#privkey").val(msg.private);
             }

             if(msg.public){
                $("#pubkey").val(msg.public);
             }

             if(msg.data){
                $("#input").val(msg.data);
             }           
        }    
    })      

        // Run a quick encryption/decryption when they click.
        $('#testme').click(function() {
          var enc_from_python = $('#input').val();
          console.log("ENCRYPTED data:", enc_from_python);
          // Decrypt with the private key...
          var decrypt = new JSEncrypt();
          decrypt.setPrivateKey($('#privkey').val());
          var uncrypted = decrypt.decrypt(enc_from_python);
          console.log(">>>",uncrypted);  //<-- this is None ! why ?
          // Now a simple check to see if the round-trip worked.
          if (uncrypted == $('#input').val()) {
            alert('It works!!!');
          }
          else {
            alert('Something went wrong....');
          }
        });
      });
    </script>
  </head>
  <body>
    <label for="privkey">Private Key</label><br/>
    <textarea id="privkey" rows="15" cols="65">   </textarea><br/>
    <label for="pubkey">Public Key</label><br/>
    <textarea id="pubkey" rows="15" cols="65">    </textarea><br/>
    <label for="input">Text to decrypt:</label><br/>
    <textarea id="input" name="input" type="text" rows=4 cols=70>This is a test!</textarea><br/>
    <input id="testme" type="button" value="Decrypt Me!!!" /><br/>
  </body>
</html>

解决方法:

如果您使用Crypto.Cipher.PKCS1_v1_5则可以.

这是python代码.

我只测试了python 3,但我相信它应该在python 2中使用__future__导入.

from __future__ import unicode_literals, print_function  # python2
from Crypto.PublicKey import RSA
from Crypto.Cipher import PKCS1_v1_5
import base64

private_key = """-----BEGIN RSA PRIVATE KEY-----
MIIBOwIBAAJBANBOMQo9wX55+w1ijEaPoYRP2T4BOjoFv3ma0QWqYYQ8FH0z14Zc
B/jb0j2PWpyNcsUUBovj+yWxQnQohCck64kCAwEAAQJBAL4s9PbNpO9MfFkfBMSS
8zoyEDtcsYUxpDtojbandDpdXfvn5D279QaOVLb1C3DgQTTEmroYB8dbeZBc5YJC
2AECIQDqyUn68ehRcx/EyLMUB1IuckZBWCIApgfn7phgVwSwiQIhAOMgY4bN+xrx
UV15Ian4ZbkME1IbAvDPcWuNGHxdsaMBAiBoz0K/S44yDfp4lj+bCUmeglTqhrVn
JLcSymgrWa02QQIhAMJFvPvcilGkYl1atCHHt3LN0mTjd+N0/OXq3SvblIsBAiAc
8RzaV1GmjMEJxw9vM/tQwQg0kyAPlITMRXnwGA6E0A==
-----END RSA PRIVATE KEY-----"""

rsa = RSA.importKey(private_key)
cipher = PKCS1_v1_5.new(rsa)

def encrypt(msg):
    ciphertext = cipher.encrypt(msg.encode('utf8'))
    return base64.b64encode(ciphertext).decode('ascii')

def decrypt(msg):
    ciphertext = base64.b64decode(msg.encode('ascii'))
    plaintext = cipher.decrypt(ciphertext, b'DECRYPTION FAILED')
    return plaintext.decode('utf8')

ciphertext = encrypt('hello stackoverflow!')
print(ciphertext)
plaintext = decrypt(ciphertext)
print(plaintext)

从明文“hello stackoverflow!”输出样本密文:

tZDRXXcf7ppbVr9JBHQ3+2k3geofl8BdDmLT3HRoqBGvfknY+xISbvy5hYH2alPAUDu2ae4iSYsLyRFBOnzpgw==

在javascript中,原始代码应该有效.这是一个简化版本,用于演示此特定密文和私有rsa密钥的工作原理.

const decrypt = () => {
  const privateKey = document.getElementById('private_key').value
  const cipherText = document.getElementById('ciphertext').value
  const decrypt = new JSEncrypt()
  decrypt.setPrivateKey(privateKey)
  const plainText = decrypt.decrypt(cipherText) || 'DECRYPTION FAILED'
  document.getElementById('plaintext').innerHTML = plainText
}
document.querySelector('button').addEventListener('click', decrypt)
<script src="https://cdnjs.cloudflare.com/ajax/libs/jsencrypt/2.3.1/jsencrypt.min.js"></script>
<button>Decrypt</button>

<p>plaintext: <em id=plaintext></em> </p>

<label>ciphertext:</label><br>
<textarea cols=64 rows=3 id=ciphertext>
tZDRXXcf7ppbVr9JBHQ3+2k3geofl8BdDmLT3HRoqBGvfknY+xISbvy5hYH2alPAUDu2ae4iSYsLyRFBOnzpgw==
</textarea>
<br>
<label>private key:</label><br>
<textarea cols=64 rows=10 id=private_key>
-----BEGIN RSA PRIVATE KEY-----
MIIBOwIBAAJBANBOMQo9wX55+w1ijEaPoYRP2T4BOjoFv3ma0QWqYYQ8FH0z14Zc
B/jb0j2PWpyNcsUUBovj+yWxQnQohCck64kCAwEAAQJBAL4s9PbNpO9MfFkfBMSS
8zoyEDtcsYUxpDtojbandDpdXfvn5D279QaOVLb1C3DgQTTEmroYB8dbeZBc5YJC
2AECIQDqyUn68ehRcx/EyLMUB1IuckZBWCIApgfn7phgVwSwiQIhAOMgY4bN+xrx
UV15Ian4ZbkME1IbAvDPcWuNGHxdsaMBAiBoz0K/S44yDfp4lj+bCUmeglTqhrVn
JLcSymgrWa02QQIhAMJFvPvcilGkYl1atCHHt3LN0mTjd+N0/OXq3SvblIsBAiAc
8RzaV1GmjMEJxw9vM/tQwQg0kyAPlITMRXnwGA6E0A==
-----END RSA PRIVATE KEY-----
</textarea>

标签:pycrypto,python,encryption,rsa,jsencrypt
来源: https://codeday.me/bug/20190823/1699828.html