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// Copyright The Notary Project 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 notation_test
import (
"context"
"crypto/x509"
"encoding/pem"
"fmt"
"oras.land/oras-go/v2/registry/remote"
"github.com/notaryproject/notation-core-go/revocation"
"github.com/notaryproject/notation-core-go/revocation/purpose"
"github.com/notaryproject/notation-core-go/testhelper"
"github.com/notaryproject/notation-go"
"github.com/notaryproject/notation-go/registry"
"github.com/notaryproject/notation-go/signer"
"github.com/notaryproject/tspclient-go"
)
// Example_signWithTimestamp demonstrates how to use notation.Sign to sign an
// artifact with a RFC 3161 compliant timestamp countersignature and
// user trusted TSA root certificate
func Example_signWithTimestamp() {
// exampleArtifactReference is an example of the target artifact reference
var exampleArtifactReference = "localhost:5000/software@sha256:60043cf45eaebc4c0867fea485a039b598f52fd09fd5b07b0b2d2f88fad9d74e"
// exampleCertTuple contains a RSA privateKey and a self-signed X509
// certificate generated for demo purpose ONLY.
exampleCertTuple := testhelper.GetRSASelfSignedSigningCertTuple("Notation Example self-signed")
exampleCerts := []*x509.Certificate{exampleCertTuple.Cert}
// exampleSigner is a notation.Signer given key and X509 certificate chain.
// Users should replace `exampleCertTuple.PrivateKey` with their own private
// key and replace `exampleCerts` with the corresponding full certificate
// chain, following the Notary certificate requirements:
// https://github.com/notaryproject/notaryproject/blob/v1.0.0/specs/signature-specification.md#certificate-requirements
exampleSigner, err := signer.NewGenericSigner(exampleCertTuple.PrivateKey, exampleCerts)
if err != nil {
panic(err) // Handle error
}
// exampleRepo is an example of registry.Repository.
remoteRepo, err := remote.NewRepository(exampleArtifactReference)
if err != nil {
panic(err) // Handle error
}
exampleRepo := registry.NewRepository(remoteRepo)
// replace exampleRFC3161TSAServer with your trusted TSA server URL.
exampleRFC3161TSAServer := "<TSA server URL>"
httpTimestamper, err := tspclient.NewHTTPTimestamper(nil, exampleRFC3161TSAServer)
if err != nil {
panic(err) // Handle error
}
// replace exampleTSARootCertPem with your trusted TSA root cert.
exampleTSARootCertPem := "<TSA root cert>"
block, _ := pem.Decode([]byte(exampleTSARootCertPem))
if block == nil {
panic("failed to parse tsa root certificate PEM")
}
tsaRootCert, err := x509.ParseCertificate(block.Bytes)
if err != nil {
panic("failed to parse tsa root certificate: " + err.Error())
}
tsaRootCAs := x509.NewCertPool()
tsaRootCAs.AddCert(tsaRootCert)
// enable timestamping certificate chain revocation check
tsaRevocationValidator, err := revocation.NewWithOptions(revocation.Options{
CertChainPurpose: purpose.Timestamping,
})
if err != nil {
panic(err) // Handle error
}
// exampleSignOptions is an example of notation.SignOptions.
exampleSignOptions := notation.SignOptions{
SignerSignOptions: notation.SignerSignOptions{
SignatureMediaType: exampleSignatureMediaType,
Timestamper: httpTimestamper,
TSARootCAs: tsaRootCAs,
TSARevocationValidator: tsaRevocationValidator,
},
ArtifactReference: exampleArtifactReference,
}
targetDesc, err := notation.Sign(context.Background(), exampleSigner, exampleRepo, exampleSignOptions)
if err != nil {
panic(err) // Handle error
}
fmt.Println("Successfully signed")
fmt.Println("targetDesc MediaType:", targetDesc.MediaType)
fmt.Println("targetDesc Digest:", targetDesc.Digest)
fmt.Println("targetDesc Size:", targetDesc.Size)
}
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