mirror of
https://github.com/gravitational/teleport.git
synced 2026-11-04 02:21:02 +08:00
120 lines
2.9 KiB
Go
120 lines
2.9 KiB
Go
/*
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Copyright 2023 Gravitational, Inc.
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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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http://www.apache.org/licenses/LICENSE-2.0
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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 gitlab
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import (
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"context"
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"fmt"
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"time"
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"github.com/coreos/go-oidc"
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"github.com/gravitational/trace"
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"github.com/jonboulle/clockwork"
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"github.com/gravitational/teleport/api/types"
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"github.com/gravitational/teleport/lib/jwt"
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"github.com/gravitational/teleport/lib/services"
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)
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type clusterNameGetter interface {
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GetClusterName(opts ...services.MarshalOption) (types.ClusterName, error)
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}
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type IDTokenValidatorConfig struct {
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// Clock is used by the validator when checking expiry and issuer times of
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// tokens. If omitted, a real clock will be used.
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Clock clockwork.Clock
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// ClusterNameGetter is used to get the cluster name in order to identify
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// the correct audience for the token.
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ClusterNameGetter clusterNameGetter
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// insecure configures the validator to use HTTP rather than HTTPS. This
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// is not exported as this is only used in the test for now.
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insecure bool
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}
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type IDTokenValidator struct {
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IDTokenValidatorConfig
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}
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func NewIDTokenValidator(
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cfg IDTokenValidatorConfig,
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) (*IDTokenValidator, error) {
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if cfg.Clock == nil {
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cfg.Clock = clockwork.NewRealClock()
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}
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if cfg.ClusterNameGetter == nil {
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return nil, trace.BadParameter(
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"ClusterNameGetter must be configured",
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)
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}
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return &IDTokenValidator{
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IDTokenValidatorConfig: cfg,
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}, nil
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}
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func (id *IDTokenValidator) issuerURL(domain string) string {
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scheme := "https"
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if id.insecure {
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scheme = "http"
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}
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return fmt.Sprintf("%s://%s", scheme, domain)
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}
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func (id *IDTokenValidator) Validate(
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ctx context.Context, domain string, token string,
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) (*IDTokenClaims, error) {
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p, err := oidc.NewProvider(
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ctx,
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id.issuerURL(domain),
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)
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if err != nil {
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return nil, trace.Wrap(err)
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}
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clusterNameResource, err := id.ClusterNameGetter.GetClusterName()
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if err != nil {
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return nil, err
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}
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verifier := p.Verifier(&oidc.Config{
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ClientID: clusterNameResource.GetClusterName(),
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Now: id.Clock.Now,
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})
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idToken, err := verifier.Verify(ctx, token)
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if err != nil {
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return nil, trace.Wrap(err)
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}
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// `go-oidc` does not implement not before check, so we need to manually
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// perform this
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if err := jwt.CheckNotBefore(
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id.Clock.Now(), time.Minute*2, idToken,
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); err != nil {
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return nil, trace.Wrap(err)
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}
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claims := IDTokenClaims{}
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if err := idToken.Claims(&claims); err != nil {
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return nil, trace.Wrap(err)
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}
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return &claims, nil
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}
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