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

左手的ㄟ右手 2022-08-05 08:43 197阅读 0赞

## 安装Cryptor库 ##

wget [https://github.com/dlitz/pycrypto/archive/master.zip][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')

[https_github.com_dlitz_pycrypto_archive_master.zip]: https://github.com/dlitz/pycrypto/archive/master.zip