113 lines
2.6 KiB
Go
113 lines
2.6 KiB
Go
/*-
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* Copyright 2016 Zbigniew Mandziejewicz
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* Copyright 2016 Square, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package jwt
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import (
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"gopkg.in/square/go-jose.v2"
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"gopkg.in/square/go-jose.v2/json"
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"strings"
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)
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// JSONWebToken represents a JSON Web Token (as specified in RFC7519).
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type JSONWebToken struct {
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payload func(k interface{}) ([]byte, error)
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Headers []jose.Header
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}
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type NestedJSONWebToken struct {
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enc *jose.JSONWebEncryption
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Headers []jose.Header
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}
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// Claims deserializes a JSONWebToken into dest using the provided key.
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func (t *JSONWebToken) Claims(key interface{}, dest ...interface{}) error {
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b, err := t.payload(key)
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if err != nil {
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return err
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}
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for _, d := range dest {
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if err := json.Unmarshal(b, d); err != nil {
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return err
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}
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}
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return nil
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}
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func (t *NestedJSONWebToken) Decrypt(decryptionKey interface{}) (*JSONWebToken, error) {
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b, err := t.enc.Decrypt(decryptionKey)
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if err != nil {
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return nil, err
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}
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sig, err := ParseSigned(string(b))
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if err != nil {
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return nil, err
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}
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return sig, nil
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}
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// ParseSigned parses token from JWS form.
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func ParseSigned(s string) (*JSONWebToken, error) {
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sig, err := jose.ParseSigned(s)
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if err != nil {
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return nil, err
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}
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headers := make([]jose.Header, len(sig.Signatures))
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for i, signature := range sig.Signatures {
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headers[i] = signature.Header
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}
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return &JSONWebToken{
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payload: sig.Verify,
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Headers: headers,
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}, nil
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}
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// ParseEncrypted parses token from JWE form.
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func ParseEncrypted(s string) (*JSONWebToken, error) {
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enc, err := jose.ParseEncrypted(s)
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if err != nil {
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return nil, err
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}
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return &JSONWebToken{
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payload: enc.Decrypt,
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Headers: []jose.Header{enc.Header},
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}, nil
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}
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// ParseSignedAndEncrypted parses signed-then-encrypted token from JWE form.
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func ParseSignedAndEncrypted(s string) (*NestedJSONWebToken, error) {
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enc, err := jose.ParseEncrypted(s)
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if err != nil {
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return nil, err
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}
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contentType, _ := enc.Header.ExtraHeaders[jose.HeaderContentType].(string)
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if strings.ToUpper(contentType) != "JWT" {
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return nil, ErrInvalidContentType
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}
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return &NestedJSONWebToken{
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enc: enc,
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Headers: []jose.Header{enc.Header},
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}, nil
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}
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