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subject_identifier_algorithm_pairwise.go
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/
subject_identifier_algorithm_pairwise.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 2017-2018 Aeneas Rekkas <aeneas+oss@aeneas.io>
* @license Apache-2.0
*/
package consent
import (
"crypto/sha256"
"fmt"
"net/url"
"github.com/ory/fosite"
"github.com/ory/hydra/client"
"github.com/pkg/errors"
)
type SubjectIdentifierAlgorithmPairwise struct {
Salt []byte
}
func NewSubjectIdentifierAlgorithmPairwise(salt []byte) *SubjectIdentifierAlgorithmPairwise {
return &SubjectIdentifierAlgorithmPairwise{Salt: salt}
}
func (g *SubjectIdentifierAlgorithmPairwise) Obfuscate(subject string, client *client.Client) (string, error) {
// sub = SHA-256 ( sector_identifier || local_account_id || salt ).
var id string
if len(client.SectorIdentifierURI) == 0 && len(client.RedirectURIs) > 1 {
return "", errors.WithStack(fosite.ErrInvalidRequest.WithHint(fmt.Sprintf("OAuth 2.0 Client %s has multiple redirect_uris but no sector_identifier_uri was set which is not allowed when performing using subject type pairwise. Please reconfigure the OAuth 2.0 client properly.", client.ClientID)))
} else if len(client.SectorIdentifierURI) == 0 && len(client.RedirectURIs) == 0 {
return "", errors.WithStack(fosite.ErrInvalidRequest.WithHint(fmt.Sprintf("OAuth 2.0 Client %s neither specifies a sector_identifier_uri nor a redirect_uri which is not allowed when performing using subject type pairwise. Please reconfigure the OAuth 2.0 client properly.", client.ClientID)))
} else if len(client.SectorIdentifierURI) > 0 {
id = client.SectorIdentifierURI
} else {
redirectURL, err := url.Parse(client.RedirectURIs[0])
if err != nil {
return "", errors.WithStack(err)
}
id = redirectURL.Host
}
return fmt.Sprintf("%x", sha256.Sum256(append(append([]byte{}, []byte(id+subject)...), g.Salt...))), nil
}