Python で RSA 暗号化、復号化、署名、検証関数を実装する方法の分析例

import rsa
# 生成密钥
(pubkey, privkey) = rsa.newkeys(1024)
# 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())
# 明文
message = 'hello'
# 公钥加密
crypto = rsa.encrypt(message.encode(), pubkey)
# 私钥解密
message = rsa.decrypt(crypto, privkey).decode()
print(message)
# 私钥签名
signature = rsa.sign(message.encode(), privkey, 'SHA-1')
# 公钥验证
rsa.verify(message.encode(), signature, pubkey)