Python使用Rsa公钥加密，私钥解密以及私钥签名，公钥验签的例子

安装Cryptor库

wget https://github.com/dlitz/pycrypto/archive/master.zip 
python setup.py install

生成rsa公钥和私钥

     
     
     
     

      
      
      
      
私钥
      
      
      
      
openssl genrsa -out ./myPrivateKey.pem -passout pass:"f00bar" -des3 2048
      
      
      
      

      
      
      
      
用私钥生成公钥
      
      
      
      
openssl rsa -pubout -in ./myPrivateKey.pem -passin pass:"f00bar" -out ./myPublicKey.pem
     
     
     
     

Rsa公钥加密，私钥解密的Python代码

encrypto.py

     
     
     
     

      
      
      
      
#!/usr/bin/python
      
      
      
      

      
      
      
      
from Crypto.PublicKey import RSA
      
      
      
      

      
      
      
      
def encrypt(message):
      
      
      
      
 externKey="./myPublicKey.pem"
      
      
      
      
 privatekey = open(externKey, "r")
      
      
      
      
 encryptor = RSA.importKey(privatekey, passphrase="f00bar")
      
      
      
      
 encriptedData=encryptor.encrypt(message, 0)
      
      
      
      
 file = open("./cryptThingy.txt", "wb")
      
      
      
      
 file.write(encriptedData[0])
      
      
      
      
 file.close()
      
      
      
      

      
      
      
      
if __name__ == "__main__":
      
      
      
      
 encryptedThingy=encrypt("Loren ipsum")
     
     
     
     

decrypto.py

     
     
     
     

      
      
      
      
#!/usr/bin/python
      
      
      
      

      
      
      
      
from Crypto.PublicKey import RSA
      
      
      
      

      
      
      
      
def decrypt():
      
      
      
      
 externKey="./myPrivateKey.pem"
      
      
      
      
 publickey = open(externKey, "r")
      
      
      
      
 decryptor = RSA.importKey(publickey, passphrase="f00bar")
      
      
      
      
 retval=None
      
      
      
      

      
      
      
      
 file = open("./cryptThingy.txt", "rb")
      
      
      
      
 retval = decryptor.decrypt(file.read())
      
      
      
      
 file.close()
      
      
      
      
 return retval
      
      
      
      

      
      
      
      

      
      
      
      
if __name__ == "__main__":
      
      
      
      
 decryptedThingy=decrypt()
      
      
      
      
 print "Decrypted: %s" % decryptedThingy
     
     
     
     

Rsa私钥签名，公钥验签的Python代码

sign.py

     
     
     
     

      
      
      
      
from Crypto.PublicKey import RSA
      
      
      
      
from Crypto.Hash import SHA
      
      
      
      
from Crypto.Signature import PKCS1_v1_5
      
      
      
      
from base64 import b64encode
      
      
      
      

      
      
      
      
def rsa_sign(message):
      
      
      
      
 private_key_file = open('./myPrivateKey.pem', 'r')
      
      
      
      
 private_key = RSA.importKey(private_key_file)
      
      
      
      
 hash_obj = SHA.new(message)
      
      
      
      
 signer = PKCS1_v1_5.new(private_key)
      
      
      
      
 d = b64encode(signer.sign(hash_obj))
      
      
      
      
 file = open('./signThing.txt', 'wb')
      
      
      
      
 file.write(d)
      
      
      
      
 file.close()
      
      
      
      

      
      
      
      
if '__main__' == __name__:
      
      
      
      
 rsa_sign('zhangshibo')
     
     
     
     

verify.py

     
     
     
     

      
      
      
      
from Crypto.PublicKey import RSA
      
      
      
      
from Crypto.Signature import PKCS1_v1_5
      
      
      
      
from Crypto.Hash import SHA
      
      
      
      
from base64 import b64decode
      
      
      
      

      
      
      
      
def rsa_verify(message):
      
      
      
      
 public_key_file = open('./myPublicKey.pem', 'r')
      
      
      
      
 public_key = RSA.importKey(public_key_file)
      
      
      
      
 sign_file = open('./signThing.txt', 'r')
      
      
      
      
 sign = b64decode(sign_file.read())
      
      
      
      
 h = SHA.new(message)
      
      
      
      
 verifier = PKCS1_v1_5.new(public_key)
      
      
      
      
 return verifier.verify(h, sign)
      
      
      
      

      
      
      
      
if '__main__' == __name__:
      
      
      
      
 print rsa_verify('zhangshibo')
     
     
     
     

+