请给出flask_jwt_extended使用RSA非对称加密的详细示例
时间: 2023-08-06 20:02:01 浏览: 173
flask_jwt_extended是一个用于Flask应用程序的JSON Web Token (JWT)扩展,它可以帮助你轻松地保护你的API。下面是一个使用RSA非对称加密的示例:
1. 安装所需的依赖
```
pip install flask flask_jwt_extended cryptography
```
2. 生成RSA密钥对
```
from cryptography.hazmat.primitives.asymmetric import rsa, padding
from cryptography.hazmat.primitives import serialization
private_key = rsa.generate_private_key(
public_exponent=65537,
key_size=2048,
)
public_key = private_key.public_key()
# 保存私钥
with open('private_key.pem', 'wb') as f:
f.write(private_key.private_bytes(
encoding=serialization.Encoding.PEM,
format=serialization.PrivateFormat.PKCS8,
encryption_algorithm=serialization.NoEncryption()
))
# 保存公钥
with open('public_key.pem', 'wb') as f:
f.write(public_key.public_bytes(
encoding=serialization.Encoding.PEM,
format=serialization.PublicFormat.SubjectPublicKeyInfo
))
```
3. 使用RSA密钥对进行JWT签名和验证
```
from flask import Flask, jsonify
from flask_jwt_extended import JWTManager, create_access_token, jwt_required
from cryptography.hazmat.primitives import serialization
from cryptography.hazmat.backends import default_backend
app = Flask(__name__)
app.config['JWT_SECRET_KEY'] = 'super-secret' # 这个密钥不用于签名,只用于加密
app.config['JWT_ALGORITHM'] = 'RS256'
jwt = JWTManager(app)
# 加载RSA密钥
with open('private_key.pem', 'rb') as f:
private_key = serialization.load_pem_private_key(
f.read(),
password=None,
backend=default_backend()
)
with open('public_key.pem', 'rb') as f:
public_key = serialization.load_pem_public_key(
f.read(),
backend=default_backend()
)
@app.route('/login')
def login():
access_token = create_access_token(
identity='user_id',
algorithm='RS256',
private_key=private_key
)
return jsonify(access_token=access_token)
@app.route('/protected')
@jwt_required(algorithms=['RS256'], public_key=public_key)
def protected():
return jsonify({'message': 'protected'})
if __name__ == '__main__':
app.run()
```
在这个示例中,我们使用RSA非对称加密算法来对JWT进行签名和验证。在生成JWT时,我们使用私钥来签名,而在验证JWT时,我们使用公钥来验证签名。使用RSA非对称加密算法可以更安全地保护JWT。
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