python实现RSA加密解密方法

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本文主要介绍在Windows+python2.7环境下实现RSA加密解密

方法一:使用M2Crypto

1.  安装M2Crypto

M2Crypto库本身在windows下安装比较麻烦,但这里我们使用大神打包好的安装包^^。

点击下载M2Crypto>>>百度网盘地址

a. 根据你的系统不同下载对应的win32或win64安装包

b. 解压压缩包,进入目录中,使用 python setup.py install 命令安装即可

2. 示例

使用M2Crypto进行RSA加密示例代码如下:

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# -*- coding: utf-8 -*-
from M2Crypto import RSA,BIO

 

rsa = RSA.gen_key(1024, 3, lambda *agr:None)
pub_bio = BIO.MemoryBuffer()
priv_bio = BIO.MemoryBuffer()

 

rsa.save_pub_key_bio(pub_bio)
rsa.save_key_bio(priv_bio, None)

 

pub_key = RSA.load_pub_key_bio(pub_bio)
priv_key = RSA.load_key_bio(priv_bio)

 

message = 'lovesoo.org'

 

encrypted = pub_key.public_encrypt(message, RSA.pkcs1_padding)
decrypted = priv_key.private_decrypt(encrypted, RSA.pkcs1_padding)

 

print encrypted
print decrypted

方法二:使用rsa

1. rsa库安装

pip install rsa

2. 示例

我们可以生成RSA公钥和密钥,也可以load一个.pem文件进来

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# -*- coding: utf-8 -*-
import rsa

 

# 先生成一对密钥,然后保存.pem格式文件,当然也可以直接使用
(pubkey, privkey) = rsa.newkeys(1024)

 

pub = pubkey.save_pkcs1()
pubfile = open('public.pem','w+')
pubfile.write(pub)
pubfile.close()

 

pri = privkey.save_pkcs1()
prifile = open('private.pem','w+')
prifile.write(pri)
prifile.close()

 

# load公钥和密钥
message = 'lovesoo.org'
with open('public.pem') as publickfile:
    p = publickfile.read()
    pubkey = rsa.PublicKey.load_pkcs1(p)

 

with open('private.pem') as privatefile:
    p = privatefile.read()
    privkey = rsa.PrivateKey.load_pkcs1(p)

 

# 用公钥加密、再用私钥解密
crypto = rsa.encrypt(message, pubkey)
message = rsa.decrypt(crypto, privkey)
print message

 

# sign 用私钥签名认证、再用公钥验证签名
signature = rsa.sign(message, privkey, 'SHA-1')
rsa.verify('lovesoo.org', signature, pubkey)

FROM:http://lovesoo.org/python-implements-rsa-encryption-and-decryption-method.html

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