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dex/vendor/gopkg.in/square/go-jose.v2/jwt/validation.go
2016-07-26 15:51:24 -07:00

88 lines
2.3 KiB
Go

/*-
* Copyright 2016 Zbigniew Mandziejewicz
* Copyright 2016 Square, Inc.
*
* 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.
*/
package jwt
import "time"
const (
// DefaultLeeway defines the default leeway for matching NotBefore/Expiry claims.
DefaultLeeway = 1.0 * time.Minute
)
// Expected defines values used for claims validation.
type Expected struct {
Issuer string
Subject string
Audience []string
ID string
Time time.Time
}
// WithTime copies expectations with new time.
func (e Expected) WithTime(t time.Time) Expected {
e.Time = t
return e
}
// Validate checks claims in a token against expected values.
// A default leeway value of one minute is used to compare time values.
func (c Claims) Validate(e Expected) error {
return c.ValidateWithLeeway(e, DefaultLeeway)
}
// ValidateWithLeeway checks claims in a token against expected values. A
// custom leeway may be specified for comparing time values. You may pass a
// zero value to check time values with no leeway, but you should not that
// numeric date values are rounded to the nearest second and sub-second
// precision is not supported.
func (c Claims) ValidateWithLeeway(e Expected, leeway time.Duration) error {
if e.Issuer != "" && e.Issuer != c.Issuer {
return ErrInvalidIssuer
}
if e.Subject != "" && e.Subject != c.Subject {
return ErrInvalidSubject
}
if e.ID != "" && e.ID != c.ID {
return ErrInvalidID
}
if len(e.Audience) != 0 {
if len(e.Audience) != len(c.Audience) {
return ErrInvalidAudience
}
for i, a := range e.Audience {
if a != c.Audience[i] {
return ErrInvalidAudience
}
}
}
if !e.Time.IsZero() && e.Time.Add(leeway).Before(c.NotBefore) {
return ErrNotValidYet
}
if !e.Time.IsZero() && e.Time.Add(-leeway).After(c.Expiry) {
return ErrExpired
}
return nil
}