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feat: add ambient credential detection with spiffe/spire
Signed-off-by: Batuhan Apaydın <batuhan.apaydin@trendyol.com> Co-authored-by: Furkan Türkal <furkan.turkal@trendyol.com> Signed-off-by: Batuhan Apaydın <batuhan.apaydin@trendyol.com>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,17 @@ | ||
| // | ||
| // Copyright 2021 The Sigstore Authors. | ||
| // | ||
| // 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 spiffe defines a SPIFFE/SPIRE implementation of the providers.Interface. | ||
| package spiffe |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,51 @@ | ||
| package spiffe | ||
|
|
||
| import ( | ||
| "context" | ||
| "os" | ||
|
|
||
| "github.com/pkg/errors" | ||
| "github.com/sigstore/cosign/pkg/providers" | ||
| "github.com/spiffe/go-spiffe/v2/workloadapi" | ||
| ) | ||
|
|
||
| func init() { | ||
| providers.Register("spiffe", &spiffe{}) | ||
| } | ||
|
|
||
| type spiffe struct{} | ||
|
|
||
| var _ providers.Interface = (*spiffe)(nil) | ||
|
|
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| const ( | ||
| // socketPath is the path to where we read an OIDC | ||
| // token from the spiffe. | ||
| // nolint | ||
| socketPath = "/run/spire-sockets/api.sock" | ||
| ) | ||
|
|
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| // Enabled implements providers.Interface | ||
| func (ga *spiffe) Enabled(ctx context.Context) bool { | ||
| // If we can stat the file without error then this is enabled. | ||
| _, err := os.Stat(socketPath) | ||
| return err == nil | ||
| } | ||
|
|
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| // Provide implements providers.Interface | ||
| func (ga *spiffe) Provide(ctx context.Context, audience string) (string, error) { | ||
| svidCtx, err := workloadapi.FetchX509Context(ctx, workloadapi.WithAddr(socketPath)) | ||
| if err != nil { | ||
| return "", err | ||
| } | ||
|
|
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| svid := svidCtx.DefaultSVID() | ||
| if len(svid.Certificates) <= 0 { | ||
| return "", errors.New("could not found certificates") | ||
| } | ||
|
|
||
| if svid.PrivateKey == nil { | ||
| return "", errors.New("could not found private key") | ||
| } | ||
|
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| return svid.ID.String(), nil | ||
| } |