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90 lines
2.5 KiB
90 lines
2.5 KiB
/*-
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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 "time"
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const (
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// DefaultLeeway defines the default leeway for matching NotBefore/Expiry claims.
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DefaultLeeway = 1.0 * time.Minute
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)
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// Expected defines values used for protected claims validation.
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// If field has zero value then validation is skipped.
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type Expected struct {
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// Issuer matches the "iss" claim exactly.
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Issuer string
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// Subject matches the "sub" claim exactly.
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Subject string
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// Audience matches the values in "aud" claim, regardless of their order.
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Audience Audience
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// ID matches the "jti" claim exactly.
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ID string
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// Time matches the "exp" and "ebf" claims with leeway.
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Time time.Time
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}
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// WithTime copies expectations with new time.
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func (e Expected) WithTime(t time.Time) Expected {
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e.Time = t
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return e
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}
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// Validate checks claims in a token against expected values.
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// A default leeway value of one minute is used to compare time values.
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func (c Claims) Validate(e Expected) error {
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return c.ValidateWithLeeway(e, DefaultLeeway)
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}
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// ValidateWithLeeway checks claims in a token against expected values. A
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// custom leeway may be specified for comparing time values. You may pass a
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// zero value to check time values with no leeway, but you should not that
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// numeric date values are rounded to the nearest second and sub-second
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// precision is not supported.
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func (c Claims) ValidateWithLeeway(e Expected, leeway time.Duration) error {
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if e.Issuer != "" && e.Issuer != c.Issuer {
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return ErrInvalidIssuer
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}
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if e.Subject != "" && e.Subject != c.Subject {
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return ErrInvalidSubject
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}
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if e.ID != "" && e.ID != c.ID {
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return ErrInvalidID
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}
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if len(e.Audience) != 0 {
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for _, v := range e.Audience {
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if !c.Audience.Contains(v) {
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return ErrInvalidAudience
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}
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}
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}
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if !e.Time.IsZero() && e.Time.Add(leeway).Before(c.NotBefore.Time()) {
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return ErrNotValidYet
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}
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if !e.Time.IsZero() && e.Time.Add(-leeway).After(c.Expiry.Time()) {
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return ErrExpired
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}
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return nil
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}
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