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verifier.go
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verifier.go
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// Copyright 2023 LiveKit, 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 auth
import (
"time"
"github.com/go-jose/go-jose/v3/jwt"
)
type APIKeyTokenVerifier struct {
token *jwt.JSONWebToken
identity string
apiKey string
}
// ParseAPIToken parses an encoded JWT token and
func ParseAPIToken(raw string) (*APIKeyTokenVerifier, error) {
tok, err := jwt.ParseSigned(raw)
if err != nil {
return nil, err
}
out := jwt.Claims{}
if err := tok.UnsafeClaimsWithoutVerification(&out); err != nil {
return nil, err
}
v := &APIKeyTokenVerifier{
token: tok,
apiKey: out.Issuer,
identity: out.Subject,
}
if v.identity == "" {
v.identity = out.ID
}
return v, nil
}
// APIKey returns the API key this token was signed with
func (v *APIKeyTokenVerifier) APIKey() string {
return v.apiKey
}
func (v *APIKeyTokenVerifier) Identity() string {
return v.identity
}
func (v *APIKeyTokenVerifier) Verify(key interface{}) (*ClaimGrants, error) {
if key == nil || key == "" {
return nil, ErrKeysMissing
}
if s, ok := key.(string); ok {
key = []byte(s)
}
out := jwt.Claims{}
claims := ClaimGrants{}
if err := v.token.Claims(key, &out, &claims); err != nil {
return nil, err
}
if err := out.Validate(jwt.Expected{Issuer: v.apiKey, Time: time.Now()}); err != nil {
return nil, err
}
// copy over identity
claims.Identity = v.identity
return &claims, nil
}