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

旧城等待， 2022-05-30 07:11 359阅读 0赞

转载自：[http://blog.csdn.net/nyist327/article/details/48352253][http_blog.csdn.net_nyist327_article_details_48352253]

## 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')

[http_blog.csdn.net_nyist327_article_details_48352253]: http://blog.csdn.net/nyist327/article/details/48352253