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oidc_server.go
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oidc_server.go
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// Copyright 2022 Monoskope Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package auth
import (
"context"
"time"
"github.com/finleap-connect/monoskope/pkg/jwt"
"github.com/finleap-connect/monoskope/pkg/logger"
"gopkg.in/square/go-jose.v2"
)
type ServerConfig struct {
URL string
TokenValidity time.Duration
}
// Server implements a very basic OIDC server which issues and validates tokens
type Server struct {
config *ServerConfig
verifier jwt.JWTVerifier
signer jwt.JWTSigner
log logger.Logger
}
// NewServer creates a new OIDC server
func NewServer(config *ServerConfig, signer jwt.JWTSigner, verifier jwt.JWTVerifier) *Server {
n := &Server{
config: config,
signer: signer,
verifier: verifier,
log: logger.WithName("auth-server"),
}
return n
}
// IssueToken wraps the upstream claims in a JWT signed by Monoskope
func (n *Server) IssueToken(ctx context.Context, upstreamClaims *jwt.StandardClaims, userId string) (string, *jwt.AuthToken, error) {
if upstreamClaims.FederatedClaims == nil {
upstreamClaims.FederatedClaims = make(map[string]string)
}
token := NewAuthToken(upstreamClaims, n.config.URL, userId, n.config.TokenValidity)
n.log.V(logger.DebugLevel).Info("Token issued successfully.", "RawToken", token, "Expiry", token.Expiry.Time().String())
signedToken, err := n.signer.GenerateSignedToken(token)
if err != nil {
return "", nil, err
}
n.log.V(logger.DebugLevel).Info("Token signed successfully.", "SignedToken", signedToken)
return signedToken, token, err
}
// Authorize parses the raw JWT, verifies the content against the public key of the verifier and parses the claims
func (n *Server) Authorize(ctx context.Context, token string, claims interface{}) error {
if err := n.verifier.Verify(token, claims); err != nil {
return err
}
return nil
}
func (n *Server) Keys() *jose.JSONWebKeySet {
return n.verifier.JWKS()
}