Python RSA操作

公钥加密、私钥解密

# -*- coding: utf-8 -*-
import rsa# rsa加密
def rsaEncrypt(str):
# 生成公钥、私钥
(pubkey, privkey) = rsa.newkeys(512)
print("pub: ", pubkey)
print("priv: ", privkey)
# 明文编码格式
content = str.encode('utf-8')
# 公钥加密
crypto = rsa.encrypt(content, pubkey)
return (crypto, privkey)# rsa解密
def rsaDecrypt(str, pk):
# 私钥解密
content = rsa.decrypt(str, pk)
con = content.decode('utf-8')
return con(a, b) = rsaEncrypt("hello")
print('加密后密文：')
print(a)
content = rsaDecrypt(a, b)
print('解密后明文：')
print(content)


密钥导出、签名验证

# -*- 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', 'wb')
pubfile.write(pub)
pubfile.close()pri = privkey.save_pkcs1()
prifile = open('private.pem', 'wb')
prifile.write(pri)
prifile.close()# load公钥和密钥
message = 'lovesoo.org'
with open('public.pem', "rb") as publickfile:
p = publickfile.read()
pubkey = rsa.PublicKey.load_pkcs1(p)
print(pubkey)
with open('private.pem', "rb") as privatefile:
p = privatefile.read()
privkey = rsa.PrivateKey.load_pkcs1(p)
print(privkey)
# 用公钥加密、再用私钥解密
crypto = rsa.encrypt(message.encode('utf-8'), pubkey)
message = rsa.decrypt(crypto, privkey)
message = message.decode('utf-8')
print (message)# sign 用私钥签名认证、再用公钥验证签名
signature = rsa.sign(message.encode('utf-8'), privkey, 'SHA-1')
method_name = rsa.verify('lovesoo.org'.encode('utf-8'), signature, pubkey)
print(method_name)


对文件进行RSA加密解密

from rsa.bigfile import *
import rsawith 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)
with open('mysec.txt', 'rb') as infile, open('outputfile', 'wb') as outfile: #加密输出
encrypt_bigfile(infile, outfile, pubkey)with open('outputfile', 'rb') as infile2, open('result', 'wb') as outfile2: #解密输出
decrypt_bigfile(infile2, outfile2, privkey)


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4.0的主要变化

版本3.4是3.x范围内的最后一个版本。版本4.0删除了以下模块，因为它们不安全：

rsa._version133

rsa._version200

rsa.bigfile

rsa.varblock

这些模块在3.4版中被标记为已弃用。

此外，在4.0中，I / O函数经过简化，可以在所有支持的Python版本上使用字节。

4.0版本不再支持Python 2.6和3.3。