resolves #516 adds support for private rekor for gitsign attest

internal/attest/attest.go

@@ -26,15 +26,18 @@ import (
 	"sort"
 
 	"github.com/go-git/go-git/v5"
-	"github.com/go-git/go-git/v5/config"
+	gitconfig "github.com/go-git/go-git/v5/config"
 	"github.com/go-git/go-git/v5/plumbing"
 	"github.com/go-git/go-git/v5/plumbing/filemode"
 	"github.com/go-git/go-git/v5/plumbing/object"
 	"github.com/go-git/go-git/v5/storage"
+	"github.com/go-openapi/strfmt"
 	"github.com/jonboulle/clockwork"
 	"github.com/sigstore/cosign/v2/cmd/cosign/cli/sign"
 	"github.com/sigstore/cosign/v2/pkg/cosign/attestation"
 	"github.com/sigstore/cosign/v2/pkg/types"
+	utils "github.com/sigstore/gitsign/internal"
+	gitsignconfig "github.com/sigstore/gitsign/internal/config"
 	rekorclient "github.com/sigstore/rekor/pkg/generated/client"
 	"github.com/sigstore/rekor/pkg/generated/models"
 	dssesig "github.com/sigstore/sigstore/pkg/signature/dsse"
@@ -57,13 +60,15 @@ type Attestor struct {
 	repo    *git.Repository
 	sv      *sign.SignerVerifier
 	rekorFn rekorUpload
+	config  *gitsignconfig.Config
 }
 
-func NewAttestor(repo *git.Repository, sv *sign.SignerVerifier, rekorFn rekorUpload) *Attestor {
+func NewAttestor(repo *git.Repository, sv *sign.SignerVerifier, rekorFn rekorUpload, config *gitsignconfig.Config) *Attestor {
 	return &Attestor{
 		repo:    repo,
 		sv:      sv,
 		rekorFn: rekorFn,
+		config:  config,
 	}
 }
 
@@ -175,7 +180,7 @@ func (a *Attestor) WriteAttestation(ctx context.Context, refName string, sha plu
 	// Step 3: Make the commit
 
 	// Grab the user from the repository config so we know who to attribute the commit to.
-	cfg, err := a.repo.ConfigScoped(config.GlobalScope)
+	cfg, err := a.repo.ConfigScoped(gitconfig.GlobalScope)
 	if err != nil {
 		return plumbing.ZeroHash, err
 	}
@@ -242,8 +247,15 @@ func (a *Attestor) signPayload(ctx context.Context, sha plumbing.Hash, b []byte,
 		return nil, err
 	}
 
+	rekorHost, rekorBasePath := utils.StripURL(a.config.Rekor)
+	tc := &rekorclient.TransportConfig{
+		Host:     rekorHost,
+		BasePath: rekorBasePath,
+	}
+	rcfg := rekorclient.NewHTTPClientWithConfig(strfmt.Default, tc)
+
 	// Upload to rekor
-	entry, err := a.rekorFn(ctx, rekorclient.Default, envelope, a.sv.Cert)
+	entry, err := a.rekorFn(ctx, rcfg, envelope, a.sv.Cert)
 	if err != nil {
 		return nil, err
 	}

internal/attest/attest_test.go

@@ -37,6 +37,7 @@ import (
 	"github.com/jonboulle/clockwork"
 	"github.com/secure-systems-lab/go-securesystemslib/dsse"
 	"github.com/sigstore/cosign/v2/cmd/cosign/cli/sign"
+	gitsignconfig "github.com/sigstore/gitsign/internal/config"
 	"github.com/sigstore/rekor/pkg/generated/client"
 	"github.com/sigstore/rekor/pkg/generated/models"
 	"github.com/sigstore/sigstore/pkg/signature"
@@ -71,7 +72,12 @@ func TestAttestCommitRef(t *testing.T) {
 	name := "test.json"
 	content := readFile(t, filepath.Join("testdata/", name))
 
-	attestor := NewAttestor(repo, sv, fakeRekor)
+	cfg, err := gitsignconfig.Get()
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	attestor := NewAttestor(repo, sv, fakeRekor, cfg)
 
 	fc := []fileContent{
 		{
@@ -149,7 +155,9 @@ func TestAttestTreeRef(t *testing.T) {
 	name := "test.json"
 	content := readFile(t, filepath.Join("testdata", name))
 
-	attestor := NewAttestor(repo, sv, fakeRekor)
+	cfg, _ := gitsignconfig.Get()
+
+	attestor := NewAttestor(repo, sv, fakeRekor, cfg)
 
 	fc := []fileContent{
 		{

internal/commands/attest/attest.go

@@ -84,7 +84,7 @@ func (o *options) Run(ctx context.Context) error {
 	}
 	defer sv.Close()
 
-	attestor := attest.NewAttestor(repo, sv, cosign.TLogUploadInTotoAttestation)
+	attestor := attest.NewAttestor(repo, sv, cosign.TLogUploadInTotoAttestation, o.Config)
 
 	out, err := attestor.WriteFile(ctx, refName, sha, o.FlagPath, o.FlagAttestationType)
 	if err != nil {

internal/utils.go

@@ -19,6 +19,7 @@ import (
 	"crypto/sha1" // #nosec G505
 	"crypto/x509"
 	"encoding/hex"
+	"net/url"
 )
 
 // certHexFingerprint calculated the hex SHA1 fingerprint of a certificate.
@@ -35,3 +36,12 @@ func certFingerprint(cert *x509.Certificate) []byte {
 	fpr := sha1.Sum(cert.Raw) // nolint:gosec
 	return fpr[:]
 }
+
+// StripURL returns the baseHost with the basePath given a full endpoint
+func StripURL(endpoint string) (string, string) {
+	u, err := url.Parse(endpoint)
+	if err != nil {
+		return "", ""
+	}
+	return u.Host, u.Path
+}

internal/utils_test.go

@@ -0,0 +1,27 @@
+// Copyright 2024 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 internal
+
+import (
+	"testing"
+)
+
+func TestStripUrl(t *testing.T) {
+	endpoint := "https://private.rekor.com/rekor"
+	host, basePath := StripURL(endpoint)
+	if host != "private.rekor.com" || basePath != "/rekor" {
+		t.Fatalf("Host and/or BasePath are not correct")
+	}
+}