Initial QSfera import

Server/vendor/github.com/libregraph/lico/oidc/provider/session.go

@@ -0,0 +1,145 @@
+/*
+ * Copyright 2017-2019 Kopano and its licensors
+ *
+ * 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 provider
+
+import (
+	"bytes"
+	"encoding/base64"
+	"encoding/gob"
+	"net/http"
+
+	"github.com/golang-jwt/jwt/v5"
+	"github.com/longsleep/rndm"
+
+	konnect "github.com/libregraph/lico"
+	"github.com/libregraph/lico/identity"
+	"github.com/libregraph/lico/oidc"
+	"github.com/libregraph/lico/oidc/payload"
+)
+
+const sessionVersion = 2
+
+func (p *Provider) getSession(req *http.Request) (*payload.Session, error) {
+	serialized, err := p.getSessionCookie(req)
+	switch err {
+	case nil:
+		// breaks
+	case http.ErrNoCookie:
+		return nil, nil
+	default:
+		return nil, err
+	}
+	// Decode.
+	return p.unserializeSession(serialized)
+}
+
+func (p *Provider) updateOrCreateSession(rw http.ResponseWriter, req *http.Request, ar *payload.AuthenticationRequest, auth identity.AuthRecord) (*payload.Session, error) {
+	session := ar.Session
+	if session != nil && session.Version == sessionVersion && session.Sub == auth.Subject() {
+		// Existing session with same sub.
+		return session, nil
+	}
+
+	// Create new session.
+	session = &payload.Session{
+		Version:  sessionVersion,
+		ID:       rndm.GenerateRandomString(32),
+		Sub:      auth.Subject(),
+		Provider: auth.Manager().Name(),
+	}
+
+	serialized, err := p.serializeSession(session)
+	if err != nil {
+		return session, err
+	}
+	err = p.setSessionCookie(rw, serialized)
+
+	return session, err
+}
+
+func (p *Provider) serializeSession(session *payload.Session) (string, error) {
+	var b bytes.Buffer
+	enc := gob.NewEncoder(&b)
+	err := enc.Encode(session)
+	if err != nil {
+		return "", err
+	}
+
+	ciphertext, err := p.encryptionManager.Encrypt(b.Bytes())
+	if err != nil {
+		return "", err
+	}
+
+	return base64.StdEncoding.EncodeToString(ciphertext), nil
+}
+
+func (p *Provider) unserializeSession(value string) (*payload.Session, error) {
+	ciphertext, err := base64.StdEncoding.DecodeString(value)
+	if err != nil {
+		return nil, err
+	}
+
+	raw, err := p.encryptionManager.Decrypt(ciphertext)
+	if err != nil {
+		return nil, err
+	}
+
+	var session payload.Session
+
+	r := bytes.NewReader(raw)
+	dec := gob.NewDecoder(r)
+
+	err = dec.Decode(&session)
+	if err != nil {
+		return nil, err
+	}
+
+	return &session, nil
+}
+
+func (p *Provider) getUserIDAndSessionRefFromClaims(claims *jwt.RegisteredClaims, sessionClaims *oidc.SessionClaims, identityClaims jwt.MapClaims) (string, *string) {
+	if claims == nil || identityClaims == nil {
+		return "", nil
+	}
+
+	if len(claims.Audience) != 1 {
+		return "", nil
+	}
+	audience := claims.Audience[0]
+
+	userIDClaim, _ := identityClaims[konnect.IdentifiedUserIDClaim].(string)
+	if userIDClaim == "" {
+		return userIDClaim, nil
+	}
+	userClaim, _ := identityClaims[konnect.IdentifiedUserClaim].(string)
+	if userClaim == "" {
+		userClaim = userIDClaim
+	}
+
+	if sessionClaims != nil {
+		sessionIDClaim := sessionClaims.SessionID
+		if sessionIDClaim != "" {
+			return userIDClaim, &sessionIDClaim
+		}
+	}
+
+	// NOTE(longsleep): Return the userID from claims and generate a session ref
+	// for it. Session refs use the userClaim if available and set by the
+	// underlaying backend.
+	return userIDClaim, identity.GetSessionRef(p.identityManager.Name(), audience, userClaim)
+}