python之初学RAS库实现：加密，解密，签名，验签

csx

最近学习RSA非对称加密，找了很多资料。发一下学习成果

RSA实例1.1生产秘钥.py

[Python] 纯文本查看 复制代码

import rsa

import time

 

v_秘钥强度 = 128

v_开始时间 = time.time()

(v_公钥, v_私钥) = rsa.newkeys(v_秘钥强度 * 8)

print('耗时：', time.time() - v_开始时间)

with open('公钥.pem', 'w+') as f:

    f.write(v_公钥.save_pkcs1().decode())

with open('私钥.pem', 'w+') as f:

    f.write(v_私钥.save_pkcs1().decode())

RSA实例1.2公钥加密信息.py

[Python] 纯文本查看 复制代码

import rsa

 

with open('公钥.pem', 'r') as f:

    v_公钥 = rsa.PublicKey.load_pkcs1(f.read().encode())

 

v_需要加密的数据 = input('输入要加密的内容：')

print(f'需要加密的原始内容：{v_需要加密的数据}')

 

# 公钥加密

v_密文 = rsa.encrypt(v_需要加密的数据.encode(), v_公钥)

 

print(f'加密后的密文：{v_密文}')

 

# 保存密文

with open('密文.b', mode='wb') as f:

    f.write(v_密文)

RSA实例1.3私钥解密信息.py

[Python] 纯文本查看 复制代码

import rsa

 

# 读取私钥

with open(file='私钥.pem', mode='r') as f:

    v_私钥 = rsa.PrivateKey.load_pkcs1(f.read().encode())

 

# 读取密文

with open(file='密文.b', mode='rb') as f:

    v_密文 = f.read()

 

# 解密明文

v_解密明文 = rsa.decrypt(v_密文, v_私钥).decode()

print(f'解密后的明文：{v_解密明文}')

RSA实例1.4私钥签名信息.py

[Python] 纯文本查看 复制代码

import rsa

 

# 读取私钥

with open(file='私钥.pem', mode='r') as f:

    v_私钥 = rsa.PrivateKey.load_pkcs1(f.read().encode())

 

v_需要签名的信息 = input('输入要签名的消息：')

v_签名数据 = rsa.sign(v_需要签名的信息.encode(), v_私钥, 'SHA-1')

 

with open(file='签名内容.txt', mode='w+') as f:

    f.write(v_需要签名的信息)

 

with open(file='签名.b', mode='wb') as f:

    f.write(v_签名数据)

 

print(f'私钥签名数据：{v_签名数据}')

RSA实例1.5公钥验证签名.py

[Python] 纯文本查看 复制代码

import rsa

 

with open('公钥.pem', 'r') as f:

    v_公钥 = rsa.PublicKey.load_pkcs1(f.read().encode())

 

with open(file='签名内容.txt', mode='r') as f:

    v_签名数据 = f.read()

 

with open(file='签名.b', mode='rb') as f:

    v_签名 = f.read()

 

print(v_签名数据)

try:

    xx = rsa.verify(v_签名数据.encode(), v_签名, v_公钥)

    if xx=='SHA-1':

        print('签名正确')

except BaseException as e:

    print('签名错误')

简单的实现了加密，解密，签名，验签。然后就可以做很多事情了。