RSA实际应用场景

import rsa
# 生成密钥
pubkey, privkey = rsa.newkeys(512)
# 保存密钥
print("==============保存密钥===============")
with open('public.pem', 'w+') as f:
    f.write(pubkey.save_pkcs1().decode())
with open('private.pem', 'w+') as f:
    f.write(privkey.save_pkcs1().decode())
# 导入密钥
with open('public.pem', 'r') as f:
    pubkey = rsa.PublicKey.load_pkcs1(f.read().encode())
with open('private.pem', 'r') as f:
    privkey = rsa.PrivateKey.load_pkcs1(f.read().encode())
"""
加密 RSA
"""
def rsa_encrypt(message):
    crypto_email_text = rsa.encrypt(message.encode(), pubkey)
    return crypto_email_text
text = rsa_encrypt("first test rsa")
print(text)
"""
解密
"""
def rsa_decrypt(message):
    message_str = rsa.decrypt(message, privkey).decode()
    return message_str
newmessage = rsa_encrypt("haha,one two three four smile!")
message = rsa_decrypt(newmessage)
print("\n", message)
"""
签名
"""
message = '这是重要指令：...'
crypto_email_text = rsa.sign(message.encode(), privkey, 'SHA-1')
"""
验证
"""
# 收到指令明文、密文，然后用公钥验证，进行身份确认
rsa.verify(message.encode(), crypto_email_text, pubkey)