title: python X.509 asymmetric encryption
body: <p>I'm trying to understand how certificate and asymmetric encryption works. I'm looking for a python library where i can import public or private ca signed certificates and automatically encrypt or decrypt message in string format, i viewed the crypto library embedded in python source, but i don't know how to use the hex modulus and exponent in this part of the certificate:</p>
  
  <pre><code>RSA Public Key: (1024 bit)  
  
                 Modulus (1024 bit):
  
                 00:b4:31:98:0a:c4:bc:62:c1:88:aa:dc:b0:c8:bb:  
                 33:35:19:d5:0c:64:b9:3d:41:b2:96:fc:f3:31:e1:  
                 66:36:d0:8e:56:12:44:ba:75:eb:e8:1c:9c:5b:66:  
                 70:33:52:14:c9:ec:4f:91:51:70:39:de:53:85:17:  
                 16:94:6e:ee:f4:d5:6f:d5:ca:b3:47:5e:1b:0c:7b:  
                 c5:cc:2b:6b:c1:90:c3:16:31:0d:bf:7a:c7:47:77:  
                 8f:a0:21:c7:4c:d0:16:65:00:c1:0f:d7:b8:80:e3:  
                 d2:75:6b:c1:ea:9e:5c:5c:ea:7d:c1:a1:10:bc:b8:  
                 e8:35:1c:9e:27:52:7e:41:8f  
  
             Exponent: 65537 (0x10001)  
  </code></pre>
  
  <p>is there anyone can help me?</p>
  
  <p>thanks</p>