本文主要介绍在Windows+python2.7环境下实现RSA加密解密。
1. 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^^。
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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
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2. 使用rsa库
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)
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