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feat: optionally load extra CA certs for HTTP statuscheck
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,104 @@ | ||
| // Copyright 2023 Chaos Mesh 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 catrust | ||
|
|
||
| import ( | ||
| "crypto/x509" | ||
| "os" | ||
| "path/filepath" | ||
|
|
||
| "github.com/pkg/errors" | ||
| ) | ||
|
|
||
| func loadExtraCACerts(caCerts *x509.CertPool) error { | ||
| extraCAPath, ok := os.LookupEnv("EXTRA_CA_TRUST_PATH") | ||
| if !ok { | ||
| return nil | ||
| } | ||
|
|
||
| err := filepath.WalkDir(extraCAPath, func(path string, d os.DirEntry, err error) error { | ||
| if err != nil { | ||
| if os.IsNotExist(err) { | ||
| return nil | ||
| } | ||
| return err | ||
| } | ||
|
|
||
| info, err := d.Info() | ||
| if err != nil { | ||
| return errors.Wrapf(err, "get info for path %q", path) | ||
| } | ||
|
|
||
| // follow symlinks - kubernetes secret volume mounts contain symlinks to the secret value files and | ||
| // a directory containing the raw data. Following symlinks allows us to process only links to regular | ||
| // files. | ||
| if info.Mode()&os.ModeSymlink == os.ModeSymlink { | ||
| newPath, err := filepath.EvalSymlinks(path) | ||
| if err != nil { | ||
| return errors.Wrapf(err, "read symlink %q", path) | ||
| } | ||
|
|
||
| path = newPath | ||
| info, err = os.Stat(path) | ||
| if err != nil { | ||
| return errors.Wrapf(err, "cannot stat %q", path) | ||
| } | ||
| } | ||
|
|
||
| // filter directories, pipes, other irregular files | ||
| if !info.Mode().IsRegular() { | ||
| return nil | ||
| } | ||
|
|
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| bytes, err := os.ReadFile(path) | ||
| if err != nil { | ||
| return errors.Wrapf(err, "read cert file %q", path) | ||
| } | ||
|
|
||
| ok := caCerts.AppendCertsFromPEM(bytes) | ||
| if !ok { | ||
| return errors.Errorf("parse PEM file %q", path) | ||
| } | ||
| return nil | ||
| }) | ||
|
|
||
| if err != nil { | ||
| return errors.Wrap(err, "load extra CA trust certificates") | ||
| } | ||
|
|
||
| return nil | ||
| } | ||
|
|
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| type CACertLoader struct{} | ||
|
|
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| func (cac CACertLoader) Load() (*x509.CertPool, error) { | ||
| caCerts, _ := x509.SystemCertPool() | ||
|
|
||
| if caCerts == nil { | ||
| caCerts = x509.NewCertPool() | ||
| } | ||
|
|
||
| err := loadExtraCACerts(caCerts) | ||
| if err != nil { | ||
| return nil, errors.Wrap(err, "load extra CA certificates") | ||
| } | ||
|
|
||
| return caCerts, nil | ||
| } | ||
|
|
||
| func New() *CACertLoader { | ||
| return &CACertLoader{} | ||
| } |
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