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verify_blob_test.go
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verify_blob_test.go
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// Copyright 2022 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 verify
import (
"bytes"
"context"
"crypto"
"crypto/ecdsa"
"crypto/elliptic"
"crypto/rand"
"crypto/sha256"
"crypto/x509"
"encoding/base64"
"encoding/hex"
"encoding/json"
"fmt"
"os"
"path/filepath"
"strings"
"testing"
"time"
"github.com/cyberphone/json-canonicalization/go/src/webpki.org/jsoncanonicalizer"
"github.com/go-openapi/swag"
ssldsse "github.com/secure-systems-lab/go-securesystemslib/dsse"
"github.com/sigstore/cosign/cmd/cosign/cli/options"
"github.com/sigstore/cosign/internal/pkg/cosign/rekor/mock"
"github.com/sigstore/cosign/pkg/cosign"
"github.com/sigstore/cosign/pkg/cosign/bundle"
sigs "github.com/sigstore/cosign/pkg/signature"
ctypes "github.com/sigstore/cosign/pkg/types"
"github.com/sigstore/cosign/test"
"github.com/sigstore/rekor/pkg/generated/client"
"github.com/sigstore/rekor/pkg/generated/models"
"github.com/sigstore/rekor/pkg/pki"
"github.com/sigstore/rekor/pkg/types"
"github.com/sigstore/rekor/pkg/types/hashedrekord"
hashedrekord_v001 "github.com/sigstore/rekor/pkg/types/hashedrekord/v0.0.1"
"github.com/sigstore/rekor/pkg/types/intoto"
"github.com/sigstore/rekor/pkg/types/rekord"
"github.com/sigstore/sigstore/pkg/cryptoutils"
"github.com/sigstore/sigstore/pkg/signature"
"github.com/sigstore/sigstore/pkg/signature/dsse"
signatureoptions "github.com/sigstore/sigstore/pkg/signature/options"
)
func TestSignaturesRef(t *testing.T) {
sig := "a=="
b64sig := "YT09"
tests := []struct {
description string
sigRef string
shouldErr bool
}{
{
description: "raw sig",
sigRef: sig,
},
{
description: "encoded sig",
sigRef: b64sig,
}, {
description: "empty ref",
shouldErr: true,
},
}
for _, test := range tests {
t.Run(test.description, func(t *testing.T) {
gotSig, err := signatures(test.sigRef, "")
if test.shouldErr && err != nil {
return
}
if test.shouldErr {
t.Fatal("should have received an error")
}
if gotSig != sig {
t.Fatalf("unexpected signature, expected: %s got: %s", sig, gotSig)
}
})
}
}
func TestSignaturesBundle(t *testing.T) {
td := t.TempDir()
fp := filepath.Join(td, "file")
sig := "a=="
b64sig := "YT09"
// save as a LocalSignedPayload to the file
lsp := cosign.LocalSignedPayload{
Base64Signature: b64sig,
}
contents, err := json.Marshal(lsp)
if err != nil {
t.Fatal(err)
}
if err := os.WriteFile(fp, contents, 0644); err != nil {
t.Fatal(err)
}
gotSig, err := signatures("", fp)
if err != nil {
t.Fatal(err)
}
if gotSig != sig {
t.Fatalf("unexpected signature, expected: %s got: %s", sig, gotSig)
}
}
func TestIsIntotoDSSEWithEnvelopes(t *testing.T) {
tts := []struct {
envelope ssldsse.Envelope
isIntotoDSSE bool
}{
{
envelope: ssldsse.Envelope{
PayloadType: "application/vnd.in-toto+json",
Payload: base64.StdEncoding.EncodeToString([]byte("This is a test")),
Signatures: []ssldsse.Signature{},
},
isIntotoDSSE: true,
},
}
for _, tt := range tts {
envlopeBytes, _ := json.Marshal(tt.envelope)
got := isIntotoDSSE(envlopeBytes)
if got != tt.isIntotoDSSE {
t.Fatalf("unexpected envelope content")
}
}
}
func TestIsIntotoDSSEWithBytes(t *testing.T) {
tts := []struct {
envelope []byte
isIntotoDSSE bool
}{
{
envelope: []byte("This is no valid"),
isIntotoDSSE: false,
},
{
envelope: []byte("MEUCIQDBmE1ZRFjUVic1hzukesJlmMFG1JqWWhcthnhawTeBNQIga3J9/WKsNlSZaySnl8V360bc2S8dIln2/qo186EfjHA="),
isIntotoDSSE: false,
},
}
for _, tt := range tts {
envlopeBytes, _ := json.Marshal(tt.envelope)
got := isIntotoDSSE(envlopeBytes)
if got != tt.isIntotoDSSE {
t.Fatalf("unexpected envelope content")
}
}
}
// Does not test identity options, only blob verification with different
// options.
func TestVerifyBlob(t *testing.T) {
ctx := context.Background()
td := t.TempDir()
leafPriv, err := ecdsa.GenerateKey(elliptic.P256(), rand.Reader)
if err != nil {
t.Fatal(err)
}
signer, err := signature.LoadECDSASignerVerifier(leafPriv, crypto.SHA256)
if err != nil {
t.Fatal(err)
}
pubKeyBytes, err := sigs.PublicKeyPem(signer, signatureoptions.WithContext(ctx))
if err != nil {
t.Fatal(err)
}
// Generate expired and unexpired certificates
identity := "hello@foo.com"
issuer := "issuer"
rootCert, rootPriv, _ := test.GenerateRootCa()
rootPool := x509.NewCertPool()
rootPool.AddCert(rootCert)
unexpiredLeafCert, _ := test.GenerateLeafCertWithExpiration(identity, issuer,
time.Now(), leafPriv, rootCert, rootPriv)
unexpiredCertPem, _ := cryptoutils.MarshalCertificateToPEM(unexpiredLeafCert)
expiredLeafCert, _ := test.GenerateLeafCertWithExpiration(identity, issuer,
time.Now().Add(-time.Hour), leafPriv, rootCert, rootPriv)
expiredLeafPem, _ := cryptoutils.MarshalCertificateToPEM(expiredLeafCert)
// Make rekor signer
rekorPriv, err := ecdsa.GenerateKey(elliptic.P256(), rand.Reader)
if err != nil {
t.Fatal(err)
}
rekorSigner, err := signature.LoadECDSASignerVerifier(rekorPriv, crypto.SHA256)
if err != nil {
t.Fatal(err)
}
pemRekor, err := cryptoutils.MarshalPublicKeyToPEM(rekorSigner.Public())
if err != nil {
t.Fatal(err)
}
tmpRekorPubFile, err := os.CreateTemp(td, "cosign_rekor_pub_*.key")
if err != nil {
t.Fatalf("failed to create temp rekor pub file: %v", err)
}
defer tmpRekorPubFile.Close()
if _, err := tmpRekorPubFile.Write(pemRekor); err != nil {
t.Fatalf("failed to write rekor pub file: %v", err)
}
t.Setenv("SIGSTORE_REKOR_PUBLIC_KEY", tmpRekorPubFile.Name())
var makeSignature = func(blob []byte) string {
sig, err := signer.SignMessage(bytes.NewReader(blob))
if err != nil {
t.Fatal(err)
}
return string(sig)
}
blobBytes := []byte("foo")
blobSignature := makeSignature(blobBytes)
otherBytes := []byte("bar")
otherSignature := makeSignature(otherBytes)
tts := []struct {
name string
blob []byte
signature string
sigVerifier signature.Verifier
cert *x509.Certificate
bundlePath string
// If online lookups to Rekor are enabled
experimental bool
// The rekor entry response when Rekor is enabled
rekorEntry *models.LogEntry
shouldErr bool
}{
{
name: "valid signature with public key",
blob: blobBytes,
signature: blobSignature,
sigVerifier: signer,
experimental: false,
shouldErr: false,
},
{
name: "valid signature with public key - experimental no rekor fail",
blob: blobBytes,
signature: blobSignature,
sigVerifier: signer,
experimental: true,
rekorEntry: nil,
shouldErr: true,
},
{
name: "valid signature with public key - experimental rekor entry success",
blob: blobBytes,
signature: blobSignature,
sigVerifier: signer,
experimental: true,
rekorEntry: makeRekorEntry(t, *rekorSigner, blobBytes, []byte(blobSignature),
pubKeyBytes, true),
shouldErr: false,
},
{
name: "valid signature with public key - good bundle provided",
blob: blobBytes,
signature: blobSignature,
sigVerifier: signer,
experimental: false,
bundlePath: makeLocalBundle(t, *rekorSigner, blobBytes, []byte(blobSignature),
pubKeyBytes, true),
shouldErr: false,
},
{
name: "valid signature with public key - bundle without rekor bundle fails",
blob: blobBytes,
signature: blobSignature,
sigVerifier: signer,
experimental: false,
bundlePath: makeLocalBundleWithoutRekorBundle(t, []byte(blobSignature), pubKeyBytes),
shouldErr: false,
},
{
name: "valid signature with public key - bad bundle SET",
blob: blobBytes,
signature: blobSignature,
sigVerifier: signer,
experimental: false,
bundlePath: makeLocalBundle(t, *signer, blobBytes, []byte(blobSignature),
unexpiredCertPem, true),
shouldErr: true,
},
{
name: "valid signature with public key - bad bundle cert mismatch",
blob: blobBytes,
signature: blobSignature,
sigVerifier: signer,
experimental: false,
bundlePath: makeLocalBundle(t, *rekorSigner, blobBytes, []byte(blobSignature),
unexpiredCertPem, true),
shouldErr: true,
},
{
name: "valid signature with public key - bad bundle signature mismatch",
blob: blobBytes,
signature: blobSignature,
sigVerifier: signer,
experimental: false,
bundlePath: makeLocalBundle(t, *rekorSigner, blobBytes, []byte(makeSignature(blobBytes)),
pubKeyBytes, true),
shouldErr: true,
},
{
name: "valid signature with public key - bad bundle msg & signature mismatch",
blob: blobBytes,
signature: blobSignature,
sigVerifier: signer,
experimental: false,
bundlePath: makeLocalBundle(t, *rekorSigner, otherBytes, []byte(otherSignature),
pubKeyBytes, true),
shouldErr: true,
},
{
name: "invalid signature with public key",
blob: blobBytes,
signature: otherSignature,
sigVerifier: signer,
experimental: false,
shouldErr: true,
},
{
name: "invalid signature with public key - experimental",
blob: blobBytes,
signature: otherSignature,
sigVerifier: signer,
experimental: true,
shouldErr: true,
},
{
name: "valid signature with unexpired certificate",
blob: blobBytes,
signature: blobSignature,
sigVerifier: signer,
cert: unexpiredLeafCert,
experimental: false,
shouldErr: false,
},
{
name: "valid signature with unexpired certificate - bad bundle cert mismatch",
blob: blobBytes,
signature: blobSignature,
sigVerifier: signer,
experimental: false,
cert: unexpiredLeafCert,
bundlePath: makeLocalBundle(t, *rekorSigner, blobBytes, []byte(blobSignature),
pubKeyBytes, true),
shouldErr: true,
},
{
name: "valid signature with unexpired certificate - bad bundle signature mismatch",
blob: blobBytes,
signature: blobSignature,
sigVerifier: signer,
experimental: false,
cert: unexpiredLeafCert,
bundlePath: makeLocalBundle(t, *rekorSigner, blobBytes, []byte(makeSignature(blobBytes)),
unexpiredCertPem, true),
shouldErr: true,
},
{
name: "valid signature with unexpired certificate - bad bundle msg & signature mismatch",
blob: blobBytes,
signature: blobSignature,
sigVerifier: signer,
experimental: false,
cert: unexpiredLeafCert,
bundlePath: makeLocalBundle(t, *rekorSigner, otherBytes, []byte(otherSignature),
unexpiredCertPem, true),
shouldErr: true,
},
{
name: "invalid signature with unexpired certificate",
blob: blobBytes,
signature: otherSignature,
sigVerifier: signer,
cert: unexpiredLeafCert,
experimental: false,
shouldErr: true,
},
{
name: "valid signature with unexpired certificate - experimental",
blob: blobBytes,
signature: blobSignature,
cert: unexpiredLeafCert,
sigVerifier: signer,
experimental: true,
rekorEntry: makeRekorEntry(t, *rekorSigner, blobBytes, []byte(blobSignature),
unexpiredCertPem, true),
shouldErr: false,
},
{
name: "valid signature with unexpired certificate - experimental & rekor entry found",
blob: blobBytes,
signature: blobSignature,
cert: unexpiredLeafCert,
experimental: true,
rekorEntry: makeRekorEntry(t, *rekorSigner, blobBytes, []byte(blobSignature),
unexpiredCertPem, true),
shouldErr: false,
},
{
name: "valid signature with expired certificate",
blob: blobBytes,
signature: blobSignature,
cert: expiredLeafCert,
sigVerifier: signer,
experimental: false,
shouldErr: true,
},
{
name: "valid signature with expired certificate - experimental good rekor lookup",
blob: blobBytes,
signature: blobSignature,
sigVerifier: signer,
cert: expiredLeafCert,
experimental: true,
rekorEntry: makeRekorEntry(t, *rekorSigner, blobBytes, []byte(blobSignature),
expiredLeafPem, true),
shouldErr: false,
},
{
name: "valid signature with expired certificate - experimental bad rekor integrated time",
blob: blobBytes,
signature: blobSignature,
cert: expiredLeafCert,
sigVerifier: signer,
experimental: true,
rekorEntry: makeRekorEntry(t, *rekorSigner, blobBytes, []byte(blobSignature),
expiredLeafPem, false),
shouldErr: true,
},
{
name: "valid signature with unexpired certificate - good bundle, nonexperimental",
blob: blobBytes,
signature: blobSignature,
cert: unexpiredLeafCert,
sigVerifier: signer,
experimental: false,
bundlePath: makeLocalBundle(t, *rekorSigner, blobBytes, []byte(blobSignature),
unexpiredCertPem, true),
shouldErr: false,
},
{
name: "valid signature with expired certificate - good bundle, nonexperimental",
blob: blobBytes,
signature: blobSignature,
cert: expiredLeafCert,
sigVerifier: signer,
experimental: false,
bundlePath: makeLocalBundle(t, *rekorSigner, blobBytes, []byte(blobSignature),
expiredLeafPem, true),
shouldErr: false,
},
{
name: "valid signature with expired certificate - bundle with bad expiration",
blob: blobBytes,
signature: blobSignature,
sigVerifier: signer,
cert: expiredLeafCert,
experimental: false,
bundlePath: makeLocalBundle(t, *rekorSigner, blobBytes, []byte(blobSignature),
expiredLeafPem, false),
shouldErr: true,
},
{
name: "valid signature with expired certificate - bundle with bad SET",
blob: blobBytes,
signature: blobSignature,
sigVerifier: signer,
cert: expiredLeafCert,
experimental: false,
bundlePath: makeLocalBundle(t, *signer, blobBytes, []byte(blobSignature),
expiredLeafPem, true),
shouldErr: true,
},
{
name: "valid signature with expired certificate - experimental good bundle",
blob: blobBytes,
signature: blobSignature,
sigVerifier: signer,
cert: expiredLeafCert,
experimental: true,
bundlePath: makeLocalBundle(t, *rekorSigner, blobBytes, []byte(blobSignature),
expiredLeafPem, true),
shouldErr: false,
},
{
name: "valid signature with expired certificate - experimental bad rekor entry",
blob: blobBytes,
signature: blobSignature,
sigVerifier: signer,
cert: expiredLeafCert,
experimental: true,
// This is the wrong signer for the SET!
rekorEntry: makeRekorEntry(t, *signer, blobBytes, []byte(blobSignature),
expiredLeafPem, true),
shouldErr: true,
},
}
for _, tt := range tts {
t.Run(tt.name, func(t *testing.T) {
tt := tt
var mClient client.Rekor
mClient.Entries = &mock.EntriesClient{Entries: tt.rekorEntry}
co := &cosign.CheckOpts{
SigVerifier: tt.sigVerifier,
RootCerts: rootPool,
}
// if expermental is enabled, add RekorClient to co.
if tt.experimental {
co.RekorClient = &mClient
}
var bundle *bundle.RekorBundle
b, err := cosign.FetchLocalSignedPayloadFromPath(tt.bundlePath)
if err == nil && b.Bundle != nil {
bundle = b.Bundle
}
err = verifyBlob(ctx, co, tt.blob, tt.signature, tt.cert, bundle, nil)
if (err != nil) != tt.shouldErr {
t.Fatalf("verifyBlob()= %s, expected shouldErr=%t ", err, tt.shouldErr)
}
})
}
}
func makeRekorEntry(t *testing.T, rekorSigner signature.ECDSASignerVerifier,
pyld, sig, svBytes []byte, expiryValid bool) *models.LogEntry {
ctx := context.Background()
// Calculate log ID, the digest of the Rekor public key
logID, err := getLogID(rekorSigner.Public())
if err != nil {
t.Fatal(err)
}
hashedrekord := &hashedrekord_v001.V001Entry{}
h := sha256.Sum256(pyld)
pe, err := hashedrekord.CreateFromArtifactProperties(ctx, types.ArtifactProperties{
ArtifactHash: hex.EncodeToString(h[:]),
SignatureBytes: sig,
PublicKeyBytes: svBytes,
PKIFormat: "x509",
})
if err != nil {
t.Fatal(err)
}
entry, err := types.NewEntry(pe)
if err != nil {
t.Fatal(err)
}
leaf, err := entry.Canonicalize(ctx)
if err != nil {
t.Fatal(err)
}
integratedTime := time.Now()
certs, _ := cryptoutils.UnmarshalCertificatesFromPEM(svBytes)
if len(certs) > 0 {
if expiryValid {
integratedTime = certs[0].NotAfter.Add(-time.Second)
} else {
integratedTime = certs[0].NotAfter.Add(time.Second)
}
}
e := models.LogEntryAnon{
Body: base64.StdEncoding.EncodeToString(leaf),
IntegratedTime: swag.Int64(integratedTime.Unix()),
LogIndex: swag.Int64(0),
LogID: swag.String(logID),
}
// Marshal payload, sign, and set SET in Bundle
jsonPayload, err := json.Marshal(e)
if err != nil {
t.Fatal(err)
}
canonicalized, err := jsoncanonicalizer.Transform(jsonPayload)
if err != nil {
t.Fatal(err)
}
bundleSig, err := rekorSigner.SignMessage(bytes.NewReader(canonicalized))
if err != nil {
t.Fatal(err)
}
uuid, _ := cosign.ComputeLeafHash(&e)
e.Verification = &models.LogEntryAnonVerification{
SignedEntryTimestamp: bundleSig,
InclusionProof: &models.InclusionProof{
LogIndex: swag.Int64(0),
TreeSize: swag.Int64(1),
RootHash: swag.String(hex.EncodeToString(uuid)),
Hashes: []string{},
},
}
return &models.LogEntry{hex.EncodeToString(uuid): e}
}
func makeLocalBundle(t *testing.T, rekorSigner signature.ECDSASignerVerifier,
pyld []byte, sig []byte, svBytes []byte, expiryValid bool) string {
td := t.TempDir()
// Create bundle.
entry := makeRekorEntry(t, rekorSigner, pyld, sig, svBytes, expiryValid)
var e models.LogEntryAnon
for _, v := range *entry {
e = v
}
b := cosign.LocalSignedPayload{
Base64Signature: base64.StdEncoding.EncodeToString(sig),
Cert: string(svBytes),
Bundle: &bundle.RekorBundle{
Payload: bundle.RekorPayload{
Body: e.Body,
IntegratedTime: *e.IntegratedTime,
LogIndex: *e.LogIndex,
LogID: *e.LogID,
},
SignedEntryTimestamp: e.Verification.SignedEntryTimestamp,
},
}
// Write bundle to disk
jsonBundle, err := json.Marshal(b)
if err != nil {
t.Fatal(err)
}
bundlePath := filepath.Join(td, "bundle.sig")
if err := os.WriteFile(bundlePath, jsonBundle, 0644); err != nil {
t.Fatal(err)
}
return bundlePath
}
func makeLocalBundleWithoutRekorBundle(t *testing.T, sig []byte, svBytes []byte) string {
td := t.TempDir()
b := cosign.LocalSignedPayload{
Base64Signature: base64.StdEncoding.EncodeToString(sig),
Cert: string(svBytes),
}
// Write bundle to disk
jsonBundle, err := json.Marshal(b)
if err != nil {
t.Fatal(err)
}
bundlePath := filepath.Join(td, "bundle.sig")
if err := os.WriteFile(bundlePath, jsonBundle, 0644); err != nil {
t.Fatal(err)
}
return bundlePath
}
func TestVerifyBlobCmdWithBundle(t *testing.T) {
keyless := newKeylessStack(t)
t.Run("Normal verification", func(t *testing.T) {
identity := "hello@foo.com"
issuer := "issuer"
leafCert, _, leafPemCert, signer := keyless.genLeafCert(t, identity, issuer)
// Create blob
blob := "someblob"
// Sign blob with private key
sig, err := signer.SignMessage(bytes.NewReader([]byte(blob)))
if err != nil {
t.Fatal(err)
}
// Create bundle
entry := genRekorEntry(t, hashedrekord.KIND, hashedrekord.New().DefaultVersion(), []byte(blob), leafPemCert, sig)
b := createBundle(t, sig, leafPemCert, keyless.rekorLogID, leafCert.NotBefore.Unix()+1, entry)
b.Bundle.SignedEntryTimestamp = keyless.rekorSignPayload(t, b.Bundle.Payload)
bundlePath := writeBundleFile(t, keyless.td, b, "bundle.json")
blobPath := writeBlobFile(t, keyless.td, blob, "blob.txt")
// Verify command
err = VerifyBlobCmd(context.Background(),
options.KeyOpts{BundlePath: bundlePath},
"", /*certRef*/ // Cert is fetched from bundle
identity, /*certEmail*/
issuer, /*certOidcIssuer*/
"", /*certChain*/ // Chain is fetched from TUF/SIGSTORE_ROOT_FILE
"", /*sigRef*/ // Sig is fetched from bundle
blobPath, /*blobRef*/
// GitHub identity flags start
"", "", "", "", "",
// GitHub identity flags end
false /*enforceSCT*/)
if err != nil {
t.Fatal(err)
}
})
t.Run("Mismatched cert/sig", func(t *testing.T) {
// This test ensures that the signature and cert at the top level in the LocalSignedPayload must be identical to the ones in the RekorBundle.
identity := "hello@foo.com"
issuer := "issuer"
leafCert, _, leafPemCert, signer := keyless.genLeafCert(t, identity, issuer)
_, _, leafPemCert2, signer2 := keyless.genLeafCert(t, identity, issuer)
// Create blob
blob := "someblob"
sig, err := signer.SignMessage(bytes.NewReader([]byte(blob)))
if err != nil {
t.Fatal(err)
}
sig2, err := signer2.SignMessage(bytes.NewReader([]byte(blob)))
if err != nil {
t.Fatal(err)
}
// Create bundle
entry := genRekorEntry(t, hashedrekord.KIND, hashedrekord.New().DefaultVersion(), []byte(blob), leafPemCert2, sig2)
b := createBundle(t, sig, leafPemCert, keyless.rekorLogID, leafCert.NotBefore.Unix()+1, entry)
b.Bundle.SignedEntryTimestamp = keyless.rekorSignPayload(t, b.Bundle.Payload)
bundlePath := writeBundleFile(t, keyless.td, b, "bundle.json")
blobPath := writeBlobFile(t, keyless.td, blob, "blob.txt")
// Verify command
err = VerifyBlobCmd(context.Background(),
options.KeyOpts{BundlePath: bundlePath},
"", /*certRef*/ // Cert is fetched from bundle
"", /*certEmail*/
"", /*certOidcIssuer*/
"", /*certChain*/ // Chain is fetched from TUF/SIGSTORE_ROOT_FILE
"", /*sigRef*/ // Sig is fetched from bundle
blobPath, /*blobRef*/
// GitHub identity flags start
"", "", "", "", "",
// GitHub identity flags end
false /*enforceSCT*/)
if err == nil {
t.Fatal("expecting err due to mismatched signatures, got nil")
}
})
t.Run("Expired cert", func(t *testing.T) {
identity := "hello@foo.com"
issuer := "issuer"
leafCert, _, leafPemCert, signer := keyless.genLeafCert(t, identity, issuer)
// Create blob
blob := "someblob"
// Sign blob with private key
sig, err := signer.SignMessage(bytes.NewReader([]byte(blob)))
if err != nil {
t.Fatal(err)
}
// Create bundle
entry := genRekorEntry(t, hashedrekord.KIND, hashedrekord.New().DefaultVersion(), []byte(blob), leafPemCert, sig)
b := createBundle(t, sig, leafPemCert, keyless.rekorLogID, leafCert.NotBefore.Unix()-1, entry)
b.Bundle.SignedEntryTimestamp = keyless.rekorSignPayload(t, b.Bundle.Payload)
bundlePath := writeBundleFile(t, keyless.td, b, "bundle.json")
blobPath := writeBlobFile(t, keyless.td, blob, "blob.txt")
// Verify command
err = VerifyBlobCmd(context.Background(),
options.KeyOpts{BundlePath: bundlePath},
"", /*certRef*/ // Cert is fetched from bundle
"", /*certEmail*/
"", /*certOidcIssuer*/
"", /*certChain*/ // Chain is fetched from TUF/SIGSTORE_ROOT_FILE
"", /*sigRef*/ // Sig is fetched from bundle
blobPath, /*blobRef*/
// GitHub identity flags start
"", "", "", "", "",
// GitHub identity flags end
false /*enforceSCT*/)
if err == nil {
t.Fatal("expected error due to expired cert, received nil")
}
})
t.Run("Attestation", func(t *testing.T) {
identity := "hello@foo.com"
issuer := "issuer"
leafCert, _, leafPemCert, signer := keyless.genLeafCert(t, identity, issuer)
stmt := `{"_type":"https://in-toto.io/Statement/v0.1","predicateType":"customFoo","subject":[{"name":"subject","digest":{"sha256":"deadbeefdeadbeefdeadbeefdeadbeefdeadbeefdeadbeefdeadbeefdeadbeef"}}],"predicate":{}}`
wrapped := dsse.WrapSigner(signer, ctypes.IntotoPayloadType)
signedPayload, err := wrapped.SignMessage(bytes.NewReader([]byte(stmt)), signatureoptions.WithContext(context.Background()))
if err != nil {
t.Fatal(err)
}
// intoto sig = json-serialized dsse envelope
sig := signedPayload
// Create bundle
entry := genRekorEntry(t, intoto.KIND, intoto.New().DefaultVersion(), signedPayload, leafPemCert, sig)
b := createBundle(t, sig, leafPemCert, keyless.rekorLogID, leafCert.NotBefore.Unix()+1, entry)
b.Bundle.SignedEntryTimestamp = keyless.rekorSignPayload(t, b.Bundle.Payload)
bundlePath := writeBundleFile(t, keyless.td, b, "bundle.json")
blobPath := writeBlobFile(t, keyless.td, string(signedPayload), "attestation.txt")
// Verify command
err = VerifyBlobCmd(context.Background(),
options.KeyOpts{BundlePath: bundlePath},
"", /*certRef*/ // Cert is fetched from bundle
"", /*certEmail*/
"", /*certOidcIssuer*/
"", /*certChain*/ // Chain is fetched from TUF/SIGSTORE_ROOT_FILE
"", /*sigRef*/ // Sig is fetched from bundle
blobPath, /*blobRef*/
// GitHub identity flags start
"", "", "", "", "",
// GitHub identity flags end
false /*enforceSCT*/)
if err != nil {
t.Fatal(err)
}
})
t.Run("Invalid blob signature", func(t *testing.T) {
identity := "hello@foo.com"
issuer := "issuer"
leafCert, _, leafPemCert, signer := keyless.genLeafCert(t, identity, issuer)
// Create blob
blob := "someblob"
// Sign blob with private key
sig, err := signer.SignMessage(bytes.NewReader([]byte(blob)))
if err != nil {
t.Fatal(err)
}
// Create bundle
entry := genRekorEntry(t, hashedrekord.KIND, hashedrekord.New().DefaultVersion(), []byte(blob), leafPemCert, sig)
b := createBundle(t, sig, leafPemCert, keyless.rekorLogID, leafCert.NotBefore.Unix()+1, entry)
b.Bundle.SignedEntryTimestamp = []byte{'i', 'n', 'v', 'a', 'l', 'i', 'd'}
bundlePath := writeBundleFile(t, keyless.td, b, "bundle.json")
blobPath := writeBlobFile(t, keyless.td, blob, "blob.txt")
// Verify command
err = VerifyBlobCmd(context.Background(),
options.KeyOpts{BundlePath: bundlePath},
"", /*certRef*/ // Cert is fetched from bundle
"", /*certEmail*/
"", /*certOidcIssuer*/
"", /*certChain*/ // Chain is fetched from TUF/SIGSTORE_ROOT_FILE
"", /*sigRef*/ // Sig is fetched from bundle
blobPath, /*blobRef*/
// GitHub identity flags start
"", "", "", "", "",
// GitHub identity flags end
false /*enforceSCT*/)
if err == nil || !strings.Contains(err.Error(), "unable to verify SET") {
t.Fatalf("expected error verifying SET, got %v", err)
}
})
t.Run("Mismatched certificate email", func(t *testing.T) {
identity := "hello@foo.com"
issuer := "issuer"
leafCert, _, leafPemCert, signer := keyless.genLeafCert(t, identity, issuer)
// Create blob
blob := "someblob"
// Sign blob with private key
sig, err := signer.SignMessage(bytes.NewReader([]byte(blob)))
if err != nil {
t.Fatal(err)
}
// Create bundle
entry := genRekorEntry(t, hashedrekord.KIND, hashedrekord.New().DefaultVersion(), []byte(blob), leafPemCert, sig)
b := createBundle(t, sig, leafPemCert, keyless.rekorLogID, leafCert.NotBefore.Unix()+1, entry)
b.Bundle.SignedEntryTimestamp = keyless.rekorSignPayload(t, b.Bundle.Payload)
bundlePath := writeBundleFile(t, keyless.td, b, "bundle.json")
blobPath := writeBlobFile(t, keyless.td, blob, "blob.txt")
// Verify command
err = VerifyBlobCmd(context.Background(),
options.KeyOpts{BundlePath: bundlePath},
"", /*certRef*/ // Cert is fetched from bundle
"invalid@example.com", /*certEmail*/
issuer, /*certOidcIssuer*/
"", /*certChain*/ // Chain is fetched from TUF/SIGSTORE_ROOT_FILE
"", /*sigRef*/ // Sig is fetched from bundle
blobPath, /*blobRef*/
// GitHub identity flags start
"", "", "", "", "",
// GitHub identity flags end
false /*enforceSCT*/)
if err == nil || !strings.Contains(err.Error(), "expected email not found in certificate") {
t.Fatalf("expected error with mismatched identity, got %v", err)
}
})
t.Run("Mismatched certificate issuer", func(t *testing.T) {
identity := "hello@foo.com"
issuer := "issuer"
leafCert, _, leafPemCert, signer := keyless.genLeafCert(t, identity, issuer)
// Create blob
blob := "someblob"
// Sign blob with private key
sig, err := signer.SignMessage(bytes.NewReader([]byte(blob)))
if err != nil {
t.Fatal(err)
}
// Create bundle
entry := genRekorEntry(t, hashedrekord.KIND, hashedrekord.New().DefaultVersion(), []byte(blob), leafPemCert, sig)
b := createBundle(t, sig, leafPemCert, keyless.rekorLogID, leafCert.NotBefore.Unix()+1, entry)
b.Bundle.SignedEntryTimestamp = keyless.rekorSignPayload(t, b.Bundle.Payload)
bundlePath := writeBundleFile(t, keyless.td, b, "bundle.json")
blobPath := writeBlobFile(t, keyless.td, blob, "blob.txt")
// Verify command
err = VerifyBlobCmd(context.Background(),
options.KeyOpts{BundlePath: bundlePath},
"", /*certRef*/ // Cert is fetched from bundle
identity, /*certEmail*/
"invalid", /*certOidcIssuer*/
"", /*certChain*/ // Chain is fetched from TUF/SIGSTORE_ROOT_FILE
"", /*sigRef*/ // Sig is fetched from bundle
blobPath, /*blobRef*/
// GitHub identity flags start
"", "", "", "", "",
// GitHub identity flags end
false /*enforceSCT*/)
if err == nil || !strings.Contains(err.Error(), "expected oidc issuer not found in certificate") {
t.Fatalf("expected error with mismatched issuer, got %v", err)
}
})
}
func TestVerifyBlobCmdInvalidRootCA(t *testing.T) {
keyless := newKeylessStack(t)
// Change the keyless stack.
_ = newKeylessStack(t)
t.Run("Invalid certificate root explicit certRef", func(t *testing.T) {
// Change the keyless stack.
_ = newKeylessStack(t)
identity := "hello@foo.com"
issuer := "issuer"
leafCert, _, leafPemCert, signer := keyless.genLeafCert(t, identity, issuer)
// Create blob
blob := "someblob"
// Sign blob with private key
sig, err := signer.SignMessage(bytes.NewReader([]byte(blob)))
if err != nil {
t.Fatal(err)
}
// Create bundle
entry := genRekorEntry(t, hashedrekord.KIND, hashedrekord.New().DefaultVersion(), []byte(blob), leafPemCert, sig)
b := createBundle(t, sig, leafPemCert, keyless.rekorLogID, leafCert.NotBefore.Unix()+1, entry)
b.Bundle.SignedEntryTimestamp = keyless.rekorSignPayload(t, b.Bundle.Payload)
bundlePath := writeBundleFile(t, keyless.td, b, "bundle.json")
blobPath := writeBlobFile(t, keyless.td, blob, "blob.txt")
certPath := writeBlobFile(t, keyless.td, string(leafPemCert), "cert.pem")
// Verify command
err = VerifyBlobCmd(context.Background(),
options.KeyOpts{BundlePath: bundlePath},
certPath, /*certRef*/
identity, /*certEmail*/
issuer, /*certOidcIssuer*/
"", /*certChain*/ // Chain is fetched from TUF/SIGSTORE_ROOT_FILE
"", /*sigRef*/ // Sig is fetched from bundle
blobPath, /*blobRef*/
// GitHub identity flags start
"", "", "", "", "",
// GitHub identity flags end
false /*enforceSCT*/)