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helper.go
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/
helper.go
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/*
* Copyright © 2015-2018 Aeneas Rekkas <aeneas+oss@aeneas.io>
*
* 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.
*
* @author Aeneas Rekkas <aeneas+oss@aeneas.io>
* @copyright 2015-2018 Aeneas Rekkas <aeneas+oss@aeneas.io>
* @license Apache-2.0
*
*/
package openid
import (
"bytes"
"context"
"crypto/sha256"
"encoding/base64"
"time"
"github.com/kalrashubham49/fosite"
)
type IDTokenHandleHelper struct {
IDTokenStrategy OpenIDConnectTokenStrategy
Storage OpenIDConnectRequestStorage
IDTokenLifeSpan time.Duration
}
func (i *IDTokenHandleHelper) GetAccessTokenHash(ctx context.Context, requester fosite.AccessRequester, responder fosite.AccessResponder) string {
token := responder.GetAccessToken()
buffer := bytes.NewBufferString(token)
hash := sha256.New()
hash.Write(buffer.Bytes())
hashBuf := bytes.NewBuffer(hash.Sum([]byte{}))
len := hashBuf.Len()
return base64.RawURLEncoding.EncodeToString(hashBuf.Bytes()[:len/2])
}
func (i *IDTokenHandleHelper) generateIDToken(ctx context.Context, fosr fosite.Requester) (token string, sig string, err error) {
token, sig, err = i.IDTokenStrategy.GenerateIDToken(ctx, fosr)
if err != nil {
return "", "", err
}
return token, sig, nil
}
func (i *IDTokenHandleHelper) IssueImplicitIDToken(ctx context.Context, ar fosite.Requester, resp fosite.AuthorizeResponder) error {
token, sig, err := i.generateIDToken(ctx, ar)
if err != nil {
return err
}
if err != nil {
return err
} else if err = i.Storage.CreateOpenIDConnectSession(ctx, sig, ar); err != nil {
return err
}
resp.AddFragment("id_token", token)
return nil
}
func (i *IDTokenHandleHelper) IssueExplicitIDToken(ctx context.Context, ar fosite.Requester, resp fosite.AccessResponder) error {
token, sig, err := i.generateIDToken(ctx, ar)
if err != nil {
return err
}
if err != nil {
return err
} else if err = i.Storage.CreateOpenIDConnectSession(ctx, sig, ar); err != nil {
return err
}
resp.SetExtra("id_token", token)
return nil
}