forked from mystiq/dex
128 lines
2.9 KiB
Go
128 lines
2.9 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 "gopkg.in/square/go-jose.v2"
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// Builder is a utility for making JSON Web Tokens. Calls can be chained, and
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// errors are accumulated until the final call to CompactSerialize/FullSerialize.
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type Builder struct {
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transform func([]byte) (serializer, payload, error)
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payload payload
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serializer serializer
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err error
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}
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type payload func(interface{}) ([]byte, error)
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type serializer interface {
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FullSerialize() string
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CompactSerialize() (string, error)
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}
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// Signed creates builder for signed tokens.
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func Signed(sig jose.Signer) *Builder {
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return &Builder{
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transform: func(b []byte) (serializer, payload, error) {
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s, err := sig.Sign(b)
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if err != nil {
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return nil, nil, err
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}
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return s, s.Verify, nil
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},
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}
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}
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// Encrypted creates builder for encrypted tokens.
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func Encrypted(enc jose.Encrypter) *Builder {
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return &Builder{
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transform: func(b []byte) (serializer, payload, error) {
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e, err := enc.Encrypt(b)
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if err != nil {
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return nil, nil, err
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}
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return e, e.Decrypt, nil
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},
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}
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}
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// Claims encodes claims into the builder.
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func (b *Builder) Claims(c interface{}) *Builder {
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if b.transform == nil {
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panic("Signer/Encrypter not set")
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}
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if b.payload != nil {
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panic("Claims already set")
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}
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raw, err := marshalClaims(c)
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if err != nil {
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return &Builder{
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err: err,
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}
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}
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ser, pl, err := b.transform(raw)
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return &Builder{
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transform: b.transform,
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serializer: ser,
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payload: pl,
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err: err,
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}
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}
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// Token builds a JSONWebToken from provided data.
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func (b *Builder) Token() (*JSONWebToken, error) {
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if b.err != nil {
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return nil, b.err
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}
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if b.payload == nil {
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return nil, ErrInvalidClaims
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}
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return &JSONWebToken{b.payload}, nil
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}
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// FullSerialize serializes a token using the full serialization format.
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func (b *Builder) FullSerialize() (string, error) {
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if b.err != nil {
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return "", b.err
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}
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if b.serializer == nil {
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return "", ErrInvalidClaims
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}
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return b.serializer.FullSerialize(), nil
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}
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// CompactSerialize serializes a token using the compact serialization format.
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func (b *Builder) CompactSerialize() (string, error) {
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if b.err != nil {
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return "", b.err
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}
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if b.serializer == nil {
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return "", ErrInvalidClaims
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}
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return b.serializer.CompactSerialize()
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}
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