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CHORE: move signer locgic out of cmd
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,83 @@ | ||
| // Copyright 2022 The Witness Contributors | ||
| // | ||
| // 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 file | ||
|
|
||
| import ( | ||
| "context" | ||
| "crypto/x509" | ||
| "fmt" | ||
| "os" | ||
|
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| "github.com/testifysec/witness/pkg/cryptoutil" | ||
| ) | ||
|
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| func Signer(ctx context.Context, keyPath, certPath string, intermediatePaths []string) (cryptoutil.Signer, error) { | ||
| keyFile, err := os.Open(keyPath) | ||
| if err != nil { | ||
| return nil, fmt.Errorf("failed to open key file: %v", err) | ||
| } | ||
|
|
||
| defer keyFile.Close() | ||
| key, err := cryptoutil.TryParseKeyFromReader(keyFile) | ||
| if err != nil { | ||
| return nil, fmt.Errorf("failed to load key: %v", err) | ||
| } | ||
|
|
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| signerOpts := []cryptoutil.SignerOption{} | ||
| if certPath != "" { | ||
| leaf, err := loadCert(certPath) | ||
| if err != nil { | ||
| return nil, fmt.Errorf("failed to load certificate: %v", err) | ||
| } | ||
|
|
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| signerOpts = append(signerOpts, cryptoutil.SignWithCertificate(leaf)) | ||
| } | ||
|
|
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| if len(intermediatePaths) > 0 { | ||
| intermediates := []*x509.Certificate{} | ||
| for _, path := range intermediatePaths { | ||
| cert, err := loadCert(path) | ||
| if err != nil { | ||
| return nil, fmt.Errorf("failed to load intermediate: %v", err) | ||
| } | ||
|
|
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| intermediates = append(intermediates, cert) | ||
| } | ||
|
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| signerOpts = append(signerOpts, cryptoutil.SignWithIntermediates(intermediates)) | ||
| } | ||
|
|
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| return cryptoutil.NewSigner(key, signerOpts...) | ||
| } | ||
|
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| func loadCert(path string) (*x509.Certificate, error) { | ||
| certFile, err := os.Open(path) | ||
| if err != nil { | ||
| return nil, fmt.Errorf("failed to load certificate: %v", err) | ||
| } | ||
|
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| defer certFile.Close() | ||
| possibleCert, err := cryptoutil.TryParseKeyFromReader(certFile) | ||
| if err != nil { | ||
| return nil, fmt.Errorf("failed to parse certificate") | ||
| } | ||
|
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| cert, ok := possibleCert.(*x509.Certificate) | ||
| if !ok { | ||
| return nil, fmt.Errorf("%v is not a x509 certificate", path) | ||
| } | ||
|
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| return cert, nil | ||
| } |
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