mirror of https://github.com/dapr/kit.git
92 lines
2.5 KiB
Go
92 lines
2.5 KiB
Go
/*
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Copyright 2024 The Dapr Authors
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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 spiffe
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import (
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"context"
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"errors"
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"fmt"
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"strings"
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"github.com/spiffe/go-spiffe/v2/svid/jwtsvid"
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"github.com/spiffe/go-spiffe/v2/svid/x509svid"
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)
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var (
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errNoX509SVIDAvailable = errors.New("no X509 SVID available")
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errNoJWTSVIDAvailable = errors.New("no JWT SVID available")
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errAudienceRequired = errors.New("audience is required")
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)
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// svidSource is an implementation of both go-spiffe x509svid.Source and jwtsvid.Source interfaces.
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type svidSource struct {
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spiffe *SPIFFE
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}
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// GetX509SVID returns the current X.509 certificate identity as a SPIFFE SVID.
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// Implements the go-spiffe x509svid.Source interface.
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func (s *svidSource) GetX509SVID() (*x509svid.SVID, error) {
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s.spiffe.lock.RLock()
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defer s.spiffe.lock.RUnlock()
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<-s.spiffe.readyCh
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svid := s.spiffe.currentX509SVID
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if svid == nil {
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return nil, errNoX509SVIDAvailable
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}
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return svid, nil
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}
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// audienceMismatchError is an error that contains information about mismatched audiences
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type audienceMismatchError struct {
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Expected []string
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Actual []string
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}
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func (e *audienceMismatchError) Error() string {
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return fmt.Sprintf("JWT SVID has different audiences than requested: expected %s, got %s",
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strings.Join(e.Expected, ", "), strings.Join(e.Actual, ", "))
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}
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// FetchJWTSVID returns the current JWT SVID.
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// Implements the go-spiffe jwtsvid.Source interface.
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func (s *svidSource) FetchJWTSVID(_ context.Context, params jwtsvid.Params) (*jwtsvid.SVID, error) {
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s.spiffe.lock.RLock()
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defer s.spiffe.lock.RUnlock()
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if params.Audience == "" {
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return nil, errAudienceRequired
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}
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<-s.spiffe.readyCh
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svid := s.spiffe.currentJWTSVID
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if svid == nil {
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return nil, errNoJWTSVIDAvailable
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}
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// verify that the audience being requested is the same as the audience in the SVID
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// WARN: we do not check extra audiences here.
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if !audiencesMatch(svid.Audience, []string{params.Audience}) {
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return nil, &audienceMismatchError{
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Expected: []string{params.Audience},
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Actual: svid.Audience,
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}
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}
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return svid, nil
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}
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