updating gotuf dep

Signed-off-by: David Lawrence <david.lawrence@docker.com> (github: endophage)

Godeps/Godeps.json

@@ -63,7 +63,7 @@
 		},
 		{
 			"ImportPath": "github.com/endophage/gotuf",
-			"Rev": "9640c9b3f2ff0ba75baf7d1a57632e16cb78d5e6"
+			"Rev": "b1fb060403583500ba06b11e35130b7c16c74c92"
 		},
 		{
 			"ImportPath": "github.com/go-sql-driver/mysql",

Godeps/_workspace/src/github.com/endophage/gotuf/.gitignore

@@ -1,2 +1,3 @@
 /db/
 *.bkp
+*.swp

Godeps/_workspace/src/github.com/endophage/gotuf/client/client.go

@@ -174,25 +174,7 @@ func (c *Client) downloadRoot() error {
 		logrus.Debug("using cached root")
 		s = old
 	}
-	// this will confirm that the root has been signed by the old root role
-	// as c.keysDB contains the root keys we bootstrapped with.
-	// Still need to determine if there has been a root key update and
-	// confirm signature with new root key
-	err = signed.Verify(s, role, version, c.keysDB)
-	if err != nil {
-		logrus.Debug("root did not verify with existing keys")
-		return err
-	}
-
-	// This will cause keyDB to get updated, overwriting any keyIDs associated
-	// with the roles in root.json
-	c.local.SetRoot(s)
-	// verify again now that the old keys have been replaced with the new keys.
-	// TODO(endophage): be more intelligent and only re-verify if we detect
-	//                  there has been a change in root keys
-	err = signed.Verify(s, role, version, c.keysDB)
-	if err != nil {
-		logrus.Debug("root did not verify with new keys")
+	if err := c.verifyRoot(role, s, version); err != nil {
 		return err
 	}
 	if download {
@@ -205,6 +187,39 @@ func (c *Client) downloadRoot() error {
 	return nil
 }
 
+func (c Client) verifyRoot(role string, s *data.Signed, minVersion int) error {
+	// this will confirm that the root has been signed by the old root role
+	// as c.keysDB contains the root keys we bootstrapped with.
+	// Still need to determine if there has been a root key update and
+	// confirm signature with new root key
+	logrus.Debug("verifying root with existing keys")
+	err := signed.Verify(s, role, minVersion, c.keysDB)
+	if err != nil {
+		logrus.Debug("root did not verify with existing keys")
+		return err
+	}
+
+	// This will cause keyDB to get updated, overwriting any keyIDs associated
+	// with the roles in root.json
+	logrus.Debug("updating known root roles and keys")
+	err = c.local.SetRoot(s)
+	if err != nil {
+		logrus.Error(err.Error())
+		return err
+	}
+	// verify again now that the old keys have been replaced with the new keys.
+	// TODO(endophage): be more intelligent and only re-verify if we detect
+	//                  there has been a change in root keys
+	logrus.Debug("verifying root with updated keys")
+	err = signed.Verify(s, role, minVersion, c.keysDB)
+	if err != nil {
+		logrus.Debug("root did not verify with new keys")
+		return err
+	}
+	logrus.Debug("successfully verified root")
+	return nil
+}
+
 // downloadTimestamp is responsible for downloading the timestamp.json
 func (c *Client) downloadTimestamp() error {
 	logrus.Debug("downloadTimestamp")
@@ -228,9 +243,13 @@ func (c *Client) downloadTimestamp() error {
 	}
 	// unlike root, targets and snapshot, always try and download timestamps
 	// from remote, only using the cache one if we couldn't reach remote.
+	logrus.Debug("Downloading timestamp")
 	raw, err := c.remote.GetMeta(role, maxSize)
 	var s *data.Signed
 	if err != nil || len(raw) == 0 {
+		if err, ok := err.(*store.ErrMetaNotFound); ok {
+			return err
+		}
 		s = old
 	} else {
 		download = true
@@ -244,6 +263,7 @@ func (c *Client) downloadTimestamp() error {
 	if err != nil {
 		return err
 	}
+	logrus.Debug("successfully verified timestamp")
 	if download {
 		c.cache.SetMeta(role, raw)
 	}
@@ -314,6 +334,7 @@ func (c *Client) downloadSnapshot() error {
 	if err != nil {
 		return err
 	}
+	logrus.Debug("successfully verified snapshot")
 	c.local.SetSnapshot(s)
 	if download {
 		err = c.cache.SetMeta(role, raw)
@@ -349,24 +370,24 @@ func (c *Client) downloadTargets(role string) error {
 	return nil
 }
 
-func (c Client) GetTargetsFile(roleName string, keyIDs []string, snapshotMeta data.Files, consistent bool, threshold int) (*data.Signed, error) {
+func (c Client) GetTargetsFile(role string, keyIDs []string, snapshotMeta data.Files, consistent bool, threshold int) (*data.Signed, error) {
 	// require role exists in snapshots
-	roleMeta, ok := snapshotMeta[roleName]
+	roleMeta, ok := snapshotMeta[role]
 	if !ok {
 		return nil, fmt.Errorf("Snapshot does not contain target role")
 	}
-	expectedSha256, ok := snapshotMeta[roleName].Hashes["sha256"]
+	expectedSha256, ok := snapshotMeta[role].Hashes["sha256"]
 	if !ok {
-		return nil, fmt.Errorf("Sha256 is currently the only hash supported by this client. No Sha256 found for targets role %s", roleName)
+		return nil, fmt.Errorf("Sha256 is currently the only hash supported by this client. No Sha256 found for targets role %s", role)
 	}
 
 	// try to get meta file from content addressed cache
 	var download bool
 	old := &data.Signed{}
 	version := 0
-	raw, err := c.cache.GetMeta(roleName, roleMeta.Length)
+	raw, err := c.cache.GetMeta(role, roleMeta.Length)
 	if err != nil || raw == nil {
-		logrus.Debugf("Couldn't not find cached %s, must download", roleName)
+		logrus.Debugf("Couldn't not find cached %s, must download", role)
 		download = true
 	} else {
 		// file may have been tampered with on disk. Always check the hash!
@@ -390,11 +411,11 @@ func (c Client) GetTargetsFile(roleName string, keyIDs []string, snapshotMeta da
 
 	var s *data.Signed
 	if download {
-		rolePath, err := c.RoleTargetsPath(roleName, hex.EncodeToString(expectedSha256), consistent)
+		rolePath, err := c.RoleTargetsPath(role, hex.EncodeToString(expectedSha256), consistent)
 		if err != nil {
 			return nil, err
 		}
-		raw, err = c.remote.GetMeta(rolePath, snapshotMeta[roleName].Length)
+		raw, err = c.remote.GetMeta(rolePath, snapshotMeta[role].Length)
 		if err != nil {
 			return nil, err
 		}
@@ -405,17 +426,18 @@ func (c Client) GetTargetsFile(roleName string, keyIDs []string, snapshotMeta da
 			return nil, err
 		}
 	} else {
-		logrus.Debug("using cached ", roleName)
+		logrus.Debug("using cached ", role)
 		s = old
 	}
 
-	err = signed.Verify(s, roleName, version, c.keysDB)
+	err = signed.Verify(s, role, version, c.keysDB)
 	if err != nil {
 		return nil, err
 	}
+	logrus.Debugf("successfully verified %s", role)
 	if download {
 		// if we error when setting meta, we should continue.
-		err = c.cache.SetMeta(roleName, raw)
+		err = c.cache.SetMeta(role, raw)
 		if err != nil {
 			logrus.Errorf("Failed to write snapshot to local cache: %s", err.Error())
 		}
@@ -425,19 +447,19 @@ func (c Client) GetTargetsFile(roleName string, keyIDs []string, snapshotMeta da
 
 // RoleTargetsPath generates the appropriate filename for the targets file,
 // based on whether the repo is marked as consistent.
-func (c Client) RoleTargetsPath(roleName string, hashSha256 string, consistent bool) (string, error) {
+func (c Client) RoleTargetsPath(role string, hashSha256 string, consistent bool) (string, error) {
 	if consistent {
-		dir := filepath.Dir(roleName)
-		if strings.Contains(roleName, "/") {
-			lastSlashIdx := strings.LastIndex(roleName, "/")
-			roleName = roleName[lastSlashIdx+1:]
+		dir := filepath.Dir(role)
+		if strings.Contains(role, "/") {
+			lastSlashIdx := strings.LastIndex(role, "/")
+			role = role[lastSlashIdx+1:]
 		}
-		roleName = path.Join(
+		role = path.Join(
 			dir,
-			fmt.Sprintf("%s.%s.json", hashSha256, roleName),
+			fmt.Sprintf("%s.%s.json", hashSha256, role),
 		)
 	}
-	return roleName, nil
+	return role, nil
 }
 
 // TargetMeta ensures the repo is up to date, downloading the minimum

Godeps/_workspace/src/github.com/endophage/gotuf/client/client_test.go

@@ -0,0 +1,190 @@
+package client
+
+import (
+	"testing"
+
+	"github.com/Sirupsen/logrus"
+	tuf "github.com/endophage/gotuf"
+	"github.com/stretchr/testify/assert"
+
+	"github.com/endophage/gotuf/data"
+	"github.com/endophage/gotuf/keys"
+	"github.com/endophage/gotuf/signed"
+	"github.com/endophage/gotuf/store"
+)
+
+func TestRotation(t *testing.T) {
+	kdb := keys.NewDB()
+	signer := signed.NewEd25519()
+	repo := tuf.NewTufRepo(kdb, signer)
+	remote := store.NewMemoryStore(nil, nil)
+	cache := store.NewMemoryStore(nil, nil)
+
+	// Generate initial root key and role and add to key DB
+	rootKey, err := signer.Create("root", data.ED25519Key)
+	assert.NoError(t, err, "Error creating root key")
+	rootRole, err := data.NewRole("root", 1, []string{rootKey.ID()}, nil, nil)
+	assert.NoError(t, err, "Error creating root role")
+
+	kdb.AddKey(rootKey)
+	err = kdb.AddRole(rootRole)
+	assert.NoError(t, err, "Error adding root role to db")
+
+	// Generate new key and role. These will appear in the root.json
+	// but will not be added to the keyDB.
+	replacementKey, err := signer.Create("root", data.ED25519Key)
+	assert.NoError(t, err, "Error creating replacement root key")
+	replacementRole, err := data.NewRole("root", 1, []string{replacementKey.ID()}, nil, nil)
+	assert.NoError(t, err, "Error creating replacement root role")
+
+	// Generate a new root with the replacement key and role
+	testRoot, err := data.NewRoot(
+		map[string]data.PublicKey{replacementKey.ID(): replacementKey},
+		map[string]*data.RootRole{"root": &replacementRole.RootRole},
+		false,
+	)
+	assert.NoError(t, err, "Failed to create new root")
+
+	// Sign testRoot with both old and new keys
+	signedRoot, err := testRoot.ToSigned()
+	err = signed.Sign(signer, signedRoot, rootKey, replacementKey)
+	assert.NoError(t, err, "Failed to sign root")
+	var origKeySig bool
+	var replKeySig bool
+	for _, sig := range signedRoot.Signatures {
+		if sig.KeyID == rootKey.ID() {
+			origKeySig = true
+		} else if sig.KeyID == replacementKey.ID() {
+			replKeySig = true
+		}
+	}
+	assert.True(t, origKeySig, "Original root key signature not present")
+	assert.True(t, replKeySig, "Replacement root key signature not present")
+
+	client := NewClient(repo, remote, kdb, cache)
+
+	err = client.verifyRoot("root", signedRoot, 0)
+	assert.NoError(t, err, "Failed to verify key rotated root")
+}
+
+func TestRotationNewSigMissing(t *testing.T) {
+	logrus.SetLevel(logrus.DebugLevel)
+	kdb := keys.NewDB()
+	signer := signed.NewEd25519()
+	repo := tuf.NewTufRepo(kdb, signer)
+	remote := store.NewMemoryStore(nil, nil)
+	cache := store.NewMemoryStore(nil, nil)
+
+	// Generate initial root key and role and add to key DB
+	rootKey, err := signer.Create("root", data.ED25519Key)
+	assert.NoError(t, err, "Error creating root key")
+	rootRole, err := data.NewRole("root", 1, []string{rootKey.ID()}, nil, nil)
+	assert.NoError(t, err, "Error creating root role")
+
+	kdb.AddKey(rootKey)
+	err = kdb.AddRole(rootRole)
+	assert.NoError(t, err, "Error adding root role to db")
+
+	// Generate new key and role. These will appear in the root.json
+	// but will not be added to the keyDB.
+	replacementKey, err := signer.Create("root", data.ED25519Key)
+	assert.NoError(t, err, "Error creating replacement root key")
+	replacementRole, err := data.NewRole("root", 1, []string{replacementKey.ID()}, nil, nil)
+	assert.NoError(t, err, "Error creating replacement root role")
+
+	assert.NotEqual(t, rootKey.ID(), replacementKey.ID(), "Key IDs are the same")
+
+	// Generate a new root with the replacement key and role
+	testRoot, err := data.NewRoot(
+		map[string]data.PublicKey{replacementKey.ID(): replacementKey},
+		map[string]*data.RootRole{"root": &replacementRole.RootRole},
+		false,
+	)
+	assert.NoError(t, err, "Failed to create new root")
+
+	_, ok := testRoot.Signed.Keys[rootKey.ID()]
+	assert.False(t, ok, "Old root key appeared in test root")
+
+	// Sign testRoot with both old and new keys
+	signedRoot, err := testRoot.ToSigned()
+	err = signed.Sign(signer, signedRoot, rootKey)
+	assert.NoError(t, err, "Failed to sign root")
+	var origKeySig bool
+	var replKeySig bool
+	for _, sig := range signedRoot.Signatures {
+		if sig.KeyID == rootKey.ID() {
+			origKeySig = true
+		} else if sig.KeyID == replacementKey.ID() {
+			replKeySig = true
+		}
+	}
+	assert.True(t, origKeySig, "Original root key signature not present")
+	assert.False(t, replKeySig, "Replacement root key signature was present and shouldn't be")
+
+	client := NewClient(repo, remote, kdb, cache)
+
+	err = client.verifyRoot("root", signedRoot, 0)
+	assert.Error(t, err, "Should have errored on verify as replacement signature was missing.")
+
+}
+
+func TestRotationOldSigMissing(t *testing.T) {
+	logrus.SetLevel(logrus.DebugLevel)
+	kdb := keys.NewDB()
+	signer := signed.NewEd25519()
+	repo := tuf.NewTufRepo(kdb, signer)
+	remote := store.NewMemoryStore(nil, nil)
+	cache := store.NewMemoryStore(nil, nil)
+
+	// Generate initial root key and role and add to key DB
+	rootKey, err := signer.Create("root", data.ED25519Key)
+	assert.NoError(t, err, "Error creating root key")
+	rootRole, err := data.NewRole("root", 1, []string{rootKey.ID()}, nil, nil)
+	assert.NoError(t, err, "Error creating root role")
+
+	kdb.AddKey(rootKey)
+	err = kdb.AddRole(rootRole)
+	assert.NoError(t, err, "Error adding root role to db")
+
+	// Generate new key and role. These will appear in the root.json
+	// but will not be added to the keyDB.
+	replacementKey, err := signer.Create("root", data.ED25519Key)
+	assert.NoError(t, err, "Error creating replacement root key")
+	replacementRole, err := data.NewRole("root", 1, []string{replacementKey.ID()}, nil, nil)
+	assert.NoError(t, err, "Error creating replacement root role")
+
+	assert.NotEqual(t, rootKey.ID(), replacementKey.ID(), "Key IDs are the same")
+
+	// Generate a new root with the replacement key and role
+	testRoot, err := data.NewRoot(
+		map[string]data.PublicKey{replacementKey.ID(): replacementKey},
+		map[string]*data.RootRole{"root": &replacementRole.RootRole},
+		false,
+	)
+	assert.NoError(t, err, "Failed to create new root")
+
+	_, ok := testRoot.Signed.Keys[rootKey.ID()]
+	assert.False(t, ok, "Old root key appeared in test root")
+
+	// Sign testRoot with both old and new keys
+	signedRoot, err := testRoot.ToSigned()
+	err = signed.Sign(signer, signedRoot, replacementKey)
+	assert.NoError(t, err, "Failed to sign root")
+	var origKeySig bool
+	var replKeySig bool
+	for _, sig := range signedRoot.Signatures {
+		if sig.KeyID == rootKey.ID() {
+			origKeySig = true
+		} else if sig.KeyID == replacementKey.ID() {
+			replKeySig = true
+		}
+	}
+	assert.False(t, origKeySig, "Original root key signature was present and shouldn't be")
+	assert.True(t, replKeySig, "Replacement root key signature was not present")
+
+	client := NewClient(repo, remote, kdb, cache)
+
+	err = client.verifyRoot("root", signedRoot, 0)
+	assert.Error(t, err, "Should have errored on verify as replacement signature was missing.")
+
+}

Godeps/_workspace/src/github.com/endophage/gotuf/signed/verify.go

@@ -3,6 +3,7 @@ package signed
 import (
 	"encoding/json"
 	"errors"
+	"strings"
 	"time"
 
 	"github.com/Sirupsen/logrus"
@@ -115,6 +116,11 @@ func VerifySignatures(s *data.Signed, role string, db *keys.KeyDB) error {
 		return ErrUnknownRole
 	}
 
+	if roleData.Threshold < 1 {
+		return ErrRoleThreshold
+	}
+	logrus.Debugf("%s role has key IDs: %s", role, strings.Join(roleData.KeyIDs, ","))
+
 	var decoded map[string]interface{}
 	if err := json.Unmarshal(s.Signed, &decoded); err != nil {
 		return err
@@ -126,6 +132,7 @@ func VerifySignatures(s *data.Signed, role string, db *keys.KeyDB) error {
 
 	valid := make(map[string]struct{})
 	for _, sig := range s.Signatures {
+		logrus.Debug("verifying signature for key ID: ", sig.KeyID)
 		if !roleData.ValidKey(sig.KeyID) {
 			logrus.Debugf("continuing b/c keyid was invalid: %s for roledata %s\n", sig.KeyID, roleData)
 			continue

Godeps/_workspace/src/github.com/endophage/gotuf/store/errors.go

@@ -1,13 +1,7 @@
 package store
 
-import (
-	"fmt"
-)
-
-type ErrMetaNotFound struct {
-	role string
-}
+type ErrMetaNotFound struct{}
 
 func (err ErrMetaNotFound) Error() string {
-	return fmt.Sprintf("no metadata for %s", err.role)
+	return "no trust data available"
 }

Godeps/_workspace/src/github.com/endophage/gotuf/store/httpstore.go

@@ -67,8 +67,9 @@ func (s HTTPStore) GetMeta(name string, size int64) ([]byte, error) {
 		return nil, err
 	}
 	defer resp.Body.Close()
+	logrus.Debugf("%d when retrieving metadata for %s", resp.StatusCode, name)
 	if resp.StatusCode == http.StatusNotFound {
-		return nil, &ErrMetaNotFound{role: name}
+		return nil, &ErrMetaNotFound{}
 	}
 	b := io.LimitReader(resp.Body, int64(size))
 	body, err := ioutil.ReadAll(b)

Godeps/_workspace/src/github.com/endophage/gotuf/store/httpstore_test.go

@@ -47,7 +47,7 @@ func TestHTTPStoreGetMeta(t *testing.T) {
 	rootPem := "-----BEGIN PUBLIC KEY-----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\niekEu4drSxpH41inLGSvdByDWLpcTvWQI9nkgclh3AT/AgMBAAE=\n-----END PUBLIC KEY-----"
 	k := data.NewPublicKey("RSA", []byte(rootPem))
 
-	sigBytes, err := hex.DecodeString(p.Signatures[0].Signature.String())
+	sigBytes := p.Signatures[0].Signature
 	if err != nil {
 		t.Fatal(err)
 	}

Godeps/_workspace/src/github.com/endophage/gotuf/store/memorystore.go

@@ -2,12 +2,15 @@ package store
 
 import (
 	"bytes"
+	"fmt"
+	"io"
 
 	"github.com/endophage/gotuf/data"
 	"github.com/endophage/gotuf/errors"
+	"github.com/endophage/gotuf/utils"
 )
 
-func NewMemoryStore(meta map[string][]byte, files map[string][]byte) LocalStore {
+func NewMemoryStore(meta map[string][]byte, files map[string][]byte) *memoryStore {
 	if meta == nil {
 		meta = make(map[string][]byte)
 	}
@@ -43,8 +46,8 @@ func (m *memoryStore) SetMultiMeta(metas map[string][]byte) error {
 	return nil
 }
 
-func (m *memoryStore) AddBlob(path string, meta data.FileMeta) {
-
+func (m *memoryStore) GetTarget(path string) (io.ReadCloser, error) {
+	return &utils.NoopCloser{Reader: bytes.NewReader(m.files[path])}, nil
 }
 
 func (m *memoryStore) WalkStagedTargets(paths []string, targetsFn targetsWalkFunc) error {
@@ -81,18 +84,6 @@ func (m *memoryStore) Commit(map[string][]byte, bool, map[string]data.Hashes) er
 	return nil
 }
 
-func (m *memoryStore) GetKeys(role string) ([]data.PrivateKey, error) {
-	return m.keys[role], nil
-}
-
-func (m *memoryStore) SaveKey(role string, key data.PrivateKey) error {
-	if _, ok := m.keys[role]; !ok {
-		m.keys[role] = make([]data.PrivateKey, 0)
-	}
-	m.keys[role] = append(m.keys[role], key)
-	return nil
-}
-
-func (m *memoryStore) Clean() error {
-	return nil
+func (m *memoryStore) GetKey(role string) ([]byte, error) {
+	return nil, fmt.Errorf("GetKey is not implemented for the memoryStore")
 }

Godeps/_workspace/src/github.com/endophage/gotuf/tuf.go

@@ -8,6 +8,7 @@ import (
 	"encoding/json"
 	"fmt"
 	"path/filepath"
+	"strings"
 	"time"
 
 	"github.com/Sirupsen/logrus"
@@ -263,9 +264,11 @@ func (tr *TufRepo) SetRoot(s *data.Signed) error {
 		return err
 	}
 	for _, key := range r.Signed.Keys {
+		logrus.Debug("Adding key ", key.ID())
 		tr.keysDB.AddKey(key)
 	}
 	for roleName, role := range r.Signed.Roles {
+		logrus.Debugf("Adding role %s with keys %s", roleName, strings.Join(role.KeyIDs, ","))
 		baseRole, err := data.NewRole(
 			roleName,
 			role.Threshold,

Godeps/_workspace/src/github.com/endophage/gotuf/utils/utils.go

@@ -70,3 +70,11 @@ func FileExists(path string) bool {
 	_, err := os.Stat(path)
 	return os.IsNotExist(err)
 }
+
+type NoopCloser struct {
+	io.Reader
+}
+
+func (nc *NoopCloser) Close() error {
+	return nil
+}