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session.go
140 lines (117 loc) · 3.54 KB
/
session.go
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/*
* 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/v4"
"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.StandardClaims, sessionClaims *oidc.SessionClaims, identityClaims jwt.MapClaims) (string, *string) {
if claims == nil || identityClaims == nil {
return "", nil
}
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(), claims.Audience, userClaim)
}