From cdc0c59cbb5fab2431c696c3d84c7e0898fe2c17 Mon Sep 17 00:00:00 2001
From: David Lawrence <david.lawrence@docker.com>
Date: Thu, 16 Apr 2015 15:49:27 -0700
Subject: [PATCH] update go-tuf dependency

---
 Godeps/Godeps.json                            |   2 +-
 .../endophage/go-tuf/client/client_test.go    |   2 +-
 .../endophage/go-tuf/client/interop_test.go   |   4 +-
 .../endophage/go-tuf/client/local_store.go    |   2 +-
 .../go-tuf/client/local_store_test.go         |   2 +-
 .../client/testdata/generate/generate.py      |   0
 .../client/testdata/generate/generate.sh      |   0
 .../endophage/go-tuf/cmd/tools/main.go        |   2 +-
 .../endophage/go-tuf/cmd/tools/meta.go        |   2 +-
 .../endophage/go-tuf/cmd/tuf-client/get.go    |   2 +-
 .../endophage/go-tuf/cmd/tuf-client/init.go   |   2 +-
 .../endophage/go-tuf/cmd/tuf-client/list.go   |   4 +-
 .../endophage/go-tuf/cmd/tuf-client/main.go   |   2 +-
 .../endophage/go-tuf/cmd/tuf/add.go           |  16 +-
 .../endophage/go-tuf/cmd/tuf/clean.go         |   2 +-
 .../endophage/go-tuf/cmd/tuf/commit.go        |   2 +-
 .../endophage/go-tuf/cmd/tuf/gen_key.go       |   2 +-
 .../endophage/go-tuf/cmd/tuf/init.go          |   2 +-
 .../endophage/go-tuf/cmd/tuf/main.go          |   9 +-
 .../endophage/go-tuf/cmd/tuf/regenerate.go    |   2 +-
 .../endophage/go-tuf/cmd/tuf/remove.go        |   2 +-
 .../endophage/go-tuf/cmd/tuf/revoke_key.go    |   2 +-
 .../endophage/go-tuf/cmd/tuf/root_keys.go     |   2 +-
 .../endophage/go-tuf/cmd/tuf/sign.go          |   2 +-
 .../endophage/go-tuf/cmd/tuf/snapshot.go      |   2 +-
 .../endophage/go-tuf/cmd/tuf/timestamp.go     |   2 +-
 .../endophage/go-tuf/data/hex_bytes_test.go   |   2 +-
 .../github.com/endophage/go-tuf/data/types.go |  35 +-
 .../endophage/go-tuf/encrypted/encrypted.go   |   4 +-
 .../go-tuf/encrypted/encrypted_test.go        |   2 +-
 .../endophage/go-tuf/{ => errors}/errors.go   |   2 +-
 .../github.com/endophage/go-tuf/keys/db.go    | 110 ++--
 .../src/github.com/endophage/go-tuf/repo.go   |  81 +--
 .../github.com/endophage/go-tuf/repo_test.go  | 502 ++++++++++--------
 .../endophage/go-tuf/signed/interface.go      |  15 +-
 .../endophage/go-tuf/signed/sign.go           |  74 ++-
 .../endophage/go-tuf/signed/sign_test.go      | 113 ++++
 .../endophage/go-tuf/signed/trust.go          |  89 ++++
 .../endophage/go-tuf/signed/verify.go         |  10 +-
 .../endophage/go-tuf/signed/verify_test.go    |   4 +-
 .../{local_store.go.bkp => filestore.go}      |  92 +---
 .../endophage/go-tuf/store/memorystore.go     |  86 +++
 .../endophage/go-tuf/util/util_test.go        |   2 +-
 43 files changed, 801 insertions(+), 495 deletions(-)
 mode change 100644 => 100755 Godeps/_workspace/src/github.com/endophage/go-tuf/client/testdata/generate/generate.py
 mode change 100644 => 100755 Godeps/_workspace/src/github.com/endophage/go-tuf/client/testdata/generate/generate.sh
 rename Godeps/_workspace/src/github.com/endophage/go-tuf/{ => errors}/errors.go (99%)
 create mode 100644 Godeps/_workspace/src/github.com/endophage/go-tuf/signed/sign_test.go
 create mode 100644 Godeps/_workspace/src/github.com/endophage/go-tuf/signed/trust.go
 rename Godeps/_workspace/src/github.com/endophage/go-tuf/store/{local_store.go.bkp => filestore.go} (82%)
 create mode 100644 Godeps/_workspace/src/github.com/endophage/go-tuf/store/memorystore.go

diff --git a/Godeps/Godeps.json b/Godeps/Godeps.json
index 8667c8b7c3..ebbf89546b 100644
--- a/Godeps/Godeps.json
+++ b/Godeps/Godeps.json
@@ -16,7 +16,7 @@
 		},
 		{
 			"ImportPath": "github.com/endophage/go-tuf",
-			"Rev": "a06029e9b42bff41f0277e5ceb482ad00299210a"
+			"Rev": "913d6f239a809f317bf3642019bc480d18e80cfc"
 		},
 		{
 			"ImportPath": "github.com/gorilla/context",
diff --git a/Godeps/_workspace/src/github.com/endophage/go-tuf/client/client_test.go b/Godeps/_workspace/src/github.com/endophage/go-tuf/client/client_test.go
index a0083acde6..af999bf347 100644
--- a/Godeps/_workspace/src/github.com/endophage/go-tuf/client/client_test.go
+++ b/Godeps/_workspace/src/github.com/endophage/go-tuf/client/client_test.go
@@ -11,11 +11,11 @@ import (
 	"time"
 
 	"github.com/flynn/go-tuf"
+	. "github.com/flynn/go-tuf/Godeps/_workspace/src/gopkg.in/check.v1"
 	"github.com/flynn/go-tuf/data"
 	"github.com/flynn/go-tuf/keys"
 	"github.com/flynn/go-tuf/signed"
 	"github.com/flynn/go-tuf/util"
-	. "gopkg.in/check.v1"
 )
 
 // Hook up gocheck into the "go test" runner.
diff --git a/Godeps/_workspace/src/github.com/endophage/go-tuf/client/interop_test.go b/Godeps/_workspace/src/github.com/endophage/go-tuf/client/interop_test.go
index 9f28f67f9c..ada487191b 100644
--- a/Godeps/_workspace/src/github.com/endophage/go-tuf/client/interop_test.go
+++ b/Godeps/_workspace/src/github.com/endophage/go-tuf/client/interop_test.go
@@ -12,11 +12,11 @@ import (
 	"path/filepath"
 	"strings"
 
-	"github.com/agl/ed25519"
 	"github.com/flynn/go-tuf"
+	"github.com/flynn/go-tuf/Godeps/_workspace/src/github.com/agl/ed25519"
+	. "github.com/flynn/go-tuf/Godeps/_workspace/src/gopkg.in/check.v1"
 	"github.com/flynn/go-tuf/data"
 	"github.com/flynn/go-tuf/util"
-	. "gopkg.in/check.v1"
 )
 
 type InteropSuite struct{}
diff --git a/Godeps/_workspace/src/github.com/endophage/go-tuf/client/local_store.go b/Godeps/_workspace/src/github.com/endophage/go-tuf/client/local_store.go
index 76fc864eb6..cd5a86fcd7 100644
--- a/Godeps/_workspace/src/github.com/endophage/go-tuf/client/local_store.go
+++ b/Godeps/_workspace/src/github.com/endophage/go-tuf/client/local_store.go
@@ -4,7 +4,7 @@ import (
 	"encoding/json"
 	"time"
 
-	"github.com/boltdb/bolt"
+	"github.com/flynn/go-tuf/Godeps/_workspace/src/github.com/boltdb/bolt"
 )
 
 func MemoryLocalStore() LocalStore {
diff --git a/Godeps/_workspace/src/github.com/endophage/go-tuf/client/local_store_test.go b/Godeps/_workspace/src/github.com/endophage/go-tuf/client/local_store_test.go
index c784dc128f..7a408f4de7 100644
--- a/Godeps/_workspace/src/github.com/endophage/go-tuf/client/local_store_test.go
+++ b/Godeps/_workspace/src/github.com/endophage/go-tuf/client/local_store_test.go
@@ -4,7 +4,7 @@ import (
 	"encoding/json"
 	"path/filepath"
 
-	. "gopkg.in/check.v1"
+	. "github.com/flynn/go-tuf/Godeps/_workspace/src/gopkg.in/check.v1"
 )
 
 type LocalStoreSuite struct{}
diff --git a/Godeps/_workspace/src/github.com/endophage/go-tuf/client/testdata/generate/generate.py b/Godeps/_workspace/src/github.com/endophage/go-tuf/client/testdata/generate/generate.py
old mode 100644
new mode 100755
diff --git a/Godeps/_workspace/src/github.com/endophage/go-tuf/client/testdata/generate/generate.sh b/Godeps/_workspace/src/github.com/endophage/go-tuf/client/testdata/generate/generate.sh
old mode 100644
new mode 100755
diff --git a/Godeps/_workspace/src/github.com/endophage/go-tuf/cmd/tools/main.go b/Godeps/_workspace/src/github.com/endophage/go-tuf/cmd/tools/main.go
index 1d9d8e1b88..4662b1d8e6 100644
--- a/Godeps/_workspace/src/github.com/endophage/go-tuf/cmd/tools/main.go
+++ b/Godeps/_workspace/src/github.com/endophage/go-tuf/cmd/tools/main.go
@@ -5,9 +5,9 @@ import (
 	"log"
 
 	"github.com/endophage/go-tuf"
+	"github.com/endophage/go-tuf/Godeps/_workspace/src/github.com/flynn/go-docopt"
 	"github.com/endophage/go-tuf/store"
 	"github.com/endophage/go-tuf/util"
-	"github.com/flynn/go-docopt"
 )
 
 func main() {
diff --git a/Godeps/_workspace/src/github.com/endophage/go-tuf/cmd/tools/meta.go b/Godeps/_workspace/src/github.com/endophage/go-tuf/cmd/tools/meta.go
index 139cc7d55b..d8a8a6280f 100644
--- a/Godeps/_workspace/src/github.com/endophage/go-tuf/cmd/tools/meta.go
+++ b/Godeps/_workspace/src/github.com/endophage/go-tuf/cmd/tools/meta.go
@@ -7,8 +7,8 @@ import (
 	"os"
 
 	"github.com/endophage/go-tuf"
+	"github.com/endophage/go-tuf/Godeps/_workspace/src/github.com/flynn/go-docopt"
 	"github.com/endophage/go-tuf/util"
-	"github.com/flynn/go-docopt"
 )
 
 func init() {
diff --git a/Godeps/_workspace/src/github.com/endophage/go-tuf/cmd/tuf-client/get.go b/Godeps/_workspace/src/github.com/endophage/go-tuf/cmd/tuf-client/get.go
index ce57c81bd8..518c0791ff 100644
--- a/Godeps/_workspace/src/github.com/endophage/go-tuf/cmd/tuf-client/get.go
+++ b/Godeps/_workspace/src/github.com/endophage/go-tuf/cmd/tuf-client/get.go
@@ -5,7 +5,7 @@ import (
 	"io/ioutil"
 	"os"
 
-	"github.com/flynn/go-docopt"
+	"github.com/flynn/go-tuf/Godeps/_workspace/src/github.com/flynn/go-docopt"
 	tuf "github.com/flynn/go-tuf/client"
 	"github.com/flynn/go-tuf/util"
 )
diff --git a/Godeps/_workspace/src/github.com/endophage/go-tuf/cmd/tuf-client/init.go b/Godeps/_workspace/src/github.com/endophage/go-tuf/cmd/tuf-client/init.go
index ae188d7dc6..77248a11d5 100644
--- a/Godeps/_workspace/src/github.com/endophage/go-tuf/cmd/tuf-client/init.go
+++ b/Godeps/_workspace/src/github.com/endophage/go-tuf/cmd/tuf-client/init.go
@@ -5,7 +5,7 @@ import (
 	"io"
 	"os"
 
-	"github.com/flynn/go-docopt"
+	"github.com/flynn/go-tuf/Godeps/_workspace/src/github.com/flynn/go-docopt"
 	tuf "github.com/flynn/go-tuf/client"
 	"github.com/flynn/go-tuf/data"
 )
diff --git a/Godeps/_workspace/src/github.com/endophage/go-tuf/cmd/tuf-client/list.go b/Godeps/_workspace/src/github.com/endophage/go-tuf/cmd/tuf-client/list.go
index 64cb947326..07ce6cf0a9 100644
--- a/Godeps/_workspace/src/github.com/endophage/go-tuf/cmd/tuf-client/list.go
+++ b/Godeps/_workspace/src/github.com/endophage/go-tuf/cmd/tuf-client/list.go
@@ -5,8 +5,8 @@ import (
 	"os"
 	"text/tabwriter"
 
-	"github.com/dustin/go-humanize"
-	"github.com/flynn/go-docopt"
+	"github.com/flynn/go-tuf/Godeps/_workspace/src/github.com/dustin/go-humanize"
+	"github.com/flynn/go-tuf/Godeps/_workspace/src/github.com/flynn/go-docopt"
 	tuf "github.com/flynn/go-tuf/client"
 )
 
diff --git a/Godeps/_workspace/src/github.com/endophage/go-tuf/cmd/tuf-client/main.go b/Godeps/_workspace/src/github.com/endophage/go-tuf/cmd/tuf-client/main.go
index 5da2ee554a..7c85d20962 100644
--- a/Godeps/_workspace/src/github.com/endophage/go-tuf/cmd/tuf-client/main.go
+++ b/Godeps/_workspace/src/github.com/endophage/go-tuf/cmd/tuf-client/main.go
@@ -4,7 +4,7 @@ import (
 	"fmt"
 	"log"
 
-	"github.com/flynn/go-docopt"
+	"github.com/flynn/go-tuf/Godeps/_workspace/src/github.com/flynn/go-docopt"
 	tuf "github.com/flynn/go-tuf/client"
 )
 
diff --git a/Godeps/_workspace/src/github.com/endophage/go-tuf/cmd/tuf/add.go b/Godeps/_workspace/src/github.com/endophage/go-tuf/cmd/tuf/add.go
index c982191ef6..077212d5c9 100644
--- a/Godeps/_workspace/src/github.com/endophage/go-tuf/cmd/tuf/add.go
+++ b/Godeps/_workspace/src/github.com/endophage/go-tuf/cmd/tuf/add.go
@@ -1,10 +1,10 @@
 package main
 
 import (
-	"encoding/json"
+	//	"encoding/json"
 
-	"github.com/flynn/go-docopt"
 	"github.com/flynn/go-tuf"
+	"github.com/flynn/go-tuf/Godeps/_workspace/src/github.com/flynn/go-docopt"
 )
 
 func init() {
@@ -20,17 +20,17 @@ Options:
 }
 
 func cmdAdd(args *docopt.Args, repo *tuf.Repo) error {
-	var custom json.RawMessage
-	if c := args.String["--custom"]; c != "" {
-		custom = json.RawMessage(c)
-	}
+	//	var custom json.RawMessage
+	//	if c := args.String["--custom"]; c != "" {
+	//		custom = json.RawMessage(c)
+	//	}
 	paths := args.All["<path>"].([]string)
 	if arg := args.String["--expires"]; arg != "" {
 		expires, err := parseExpires(arg)
 		if err != nil {
 			return err
 		}
-		return repo.AddTargetsWithExpires(paths, custom, expires)
+		return repo.AddTargetsWithExpires(paths, nil, expires)
 	}
-	return repo.AddTargets(paths, custom)
+	return repo.AddTargets(paths, nil)
 }
diff --git a/Godeps/_workspace/src/github.com/endophage/go-tuf/cmd/tuf/clean.go b/Godeps/_workspace/src/github.com/endophage/go-tuf/cmd/tuf/clean.go
index 40814a059f..650489e5fd 100644
--- a/Godeps/_workspace/src/github.com/endophage/go-tuf/cmd/tuf/clean.go
+++ b/Godeps/_workspace/src/github.com/endophage/go-tuf/cmd/tuf/clean.go
@@ -1,8 +1,8 @@
 package main
 
 import (
-	"github.com/flynn/go-docopt"
 	"github.com/flynn/go-tuf"
+	"github.com/flynn/go-tuf/Godeps/_workspace/src/github.com/flynn/go-docopt"
 )
 
 func init() {
diff --git a/Godeps/_workspace/src/github.com/endophage/go-tuf/cmd/tuf/commit.go b/Godeps/_workspace/src/github.com/endophage/go-tuf/cmd/tuf/commit.go
index 764d432cbb..1688a74bd0 100644
--- a/Godeps/_workspace/src/github.com/endophage/go-tuf/cmd/tuf/commit.go
+++ b/Godeps/_workspace/src/github.com/endophage/go-tuf/cmd/tuf/commit.go
@@ -1,8 +1,8 @@
 package main
 
 import (
-	"github.com/flynn/go-docopt"
 	"github.com/flynn/go-tuf"
+	"github.com/flynn/go-tuf/Godeps/_workspace/src/github.com/flynn/go-docopt"
 )
 
 func init() {
diff --git a/Godeps/_workspace/src/github.com/endophage/go-tuf/cmd/tuf/gen_key.go b/Godeps/_workspace/src/github.com/endophage/go-tuf/cmd/tuf/gen_key.go
index 6df24a71b9..6dbca5559a 100644
--- a/Godeps/_workspace/src/github.com/endophage/go-tuf/cmd/tuf/gen_key.go
+++ b/Godeps/_workspace/src/github.com/endophage/go-tuf/cmd/tuf/gen_key.go
@@ -3,8 +3,8 @@ package main
 import (
 	"fmt"
 
-	"github.com/flynn/go-docopt"
 	"github.com/flynn/go-tuf"
+	"github.com/flynn/go-tuf/Godeps/_workspace/src/github.com/flynn/go-docopt"
 )
 
 func init() {
diff --git a/Godeps/_workspace/src/github.com/endophage/go-tuf/cmd/tuf/init.go b/Godeps/_workspace/src/github.com/endophage/go-tuf/cmd/tuf/init.go
index af328acca9..6fb2c19a4f 100644
--- a/Godeps/_workspace/src/github.com/endophage/go-tuf/cmd/tuf/init.go
+++ b/Godeps/_workspace/src/github.com/endophage/go-tuf/cmd/tuf/init.go
@@ -1,8 +1,8 @@
 package main
 
 import (
-	"github.com/flynn/go-docopt"
 	"github.com/flynn/go-tuf"
+	"github.com/flynn/go-tuf/Godeps/_workspace/src/github.com/flynn/go-docopt"
 )
 
 func init() {
diff --git a/Godeps/_workspace/src/github.com/endophage/go-tuf/cmd/tuf/main.go b/Godeps/_workspace/src/github.com/endophage/go-tuf/cmd/tuf/main.go
index 37d0e8728b..9b4e1604ed 100644
--- a/Godeps/_workspace/src/github.com/endophage/go-tuf/cmd/tuf/main.go
+++ b/Godeps/_workspace/src/github.com/endophage/go-tuf/cmd/tuf/main.go
@@ -11,9 +11,11 @@ import (
 	"strings"
 	"time"
 
-	"github.com/docker/docker/pkg/term"
-	"github.com/flynn/go-docopt"
+	"github.com/endophage/go-tuf/signed"
+	"github.com/endophage/go-tuf/store"
 	"github.com/flynn/go-tuf"
+	"github.com/flynn/go-tuf/Godeps/_workspace/src/github.com/docker/docker/pkg/term"
+	"github.com/flynn/go-tuf/Godeps/_workspace/src/github.com/flynn/go-docopt"
 	"github.com/flynn/go-tuf/util"
 )
 
@@ -107,7 +109,8 @@ func runCommand(name string, args []string, dir string, insecure bool) error {
 	if !insecure {
 		p = getPassphrase
 	}
-	repo, err := tuf.NewRepo(tuf.FileSystemStore(dir, p))
+	signer := signed.Ed25519{}
+	repo, err := tuf.NewRepo(signer, store.FileSystemStore(dir, p), "sha256")
 	if err != nil {
 		return err
 	}
diff --git a/Godeps/_workspace/src/github.com/endophage/go-tuf/cmd/tuf/regenerate.go b/Godeps/_workspace/src/github.com/endophage/go-tuf/cmd/tuf/regenerate.go
index 70d5ec1dad..77f3e097b2 100644
--- a/Godeps/_workspace/src/github.com/endophage/go-tuf/cmd/tuf/regenerate.go
+++ b/Godeps/_workspace/src/github.com/endophage/go-tuf/cmd/tuf/regenerate.go
@@ -3,8 +3,8 @@ package main
 import (
 	"log"
 
-	"github.com/flynn/go-docopt"
 	"github.com/flynn/go-tuf"
+	"github.com/flynn/go-tuf/Godeps/_workspace/src/github.com/flynn/go-docopt"
 )
 
 func init() {
diff --git a/Godeps/_workspace/src/github.com/endophage/go-tuf/cmd/tuf/remove.go b/Godeps/_workspace/src/github.com/endophage/go-tuf/cmd/tuf/remove.go
index 2871cfd16f..7fb61a4eef 100644
--- a/Godeps/_workspace/src/github.com/endophage/go-tuf/cmd/tuf/remove.go
+++ b/Godeps/_workspace/src/github.com/endophage/go-tuf/cmd/tuf/remove.go
@@ -3,8 +3,8 @@ package main
 import (
 	"errors"
 
-	"github.com/flynn/go-docopt"
 	"github.com/flynn/go-tuf"
+	"github.com/flynn/go-tuf/Godeps/_workspace/src/github.com/flynn/go-docopt"
 )
 
 func init() {
diff --git a/Godeps/_workspace/src/github.com/endophage/go-tuf/cmd/tuf/revoke_key.go b/Godeps/_workspace/src/github.com/endophage/go-tuf/cmd/tuf/revoke_key.go
index e243a702db..d214dab779 100644
--- a/Godeps/_workspace/src/github.com/endophage/go-tuf/cmd/tuf/revoke_key.go
+++ b/Godeps/_workspace/src/github.com/endophage/go-tuf/cmd/tuf/revoke_key.go
@@ -1,8 +1,8 @@
 package main
 
 import (
-	"github.com/flynn/go-docopt"
 	"github.com/flynn/go-tuf"
+	"github.com/flynn/go-tuf/Godeps/_workspace/src/github.com/flynn/go-docopt"
 )
 
 func init() {
diff --git a/Godeps/_workspace/src/github.com/endophage/go-tuf/cmd/tuf/root_keys.go b/Godeps/_workspace/src/github.com/endophage/go-tuf/cmd/tuf/root_keys.go
index ec6a59ff82..1ea4c04fa0 100644
--- a/Godeps/_workspace/src/github.com/endophage/go-tuf/cmd/tuf/root_keys.go
+++ b/Godeps/_workspace/src/github.com/endophage/go-tuf/cmd/tuf/root_keys.go
@@ -4,8 +4,8 @@ import (
 	"encoding/json"
 	"os"
 
-	"github.com/flynn/go-docopt"
 	"github.com/flynn/go-tuf"
+	"github.com/flynn/go-tuf/Godeps/_workspace/src/github.com/flynn/go-docopt"
 )
 
 func init() {
diff --git a/Godeps/_workspace/src/github.com/endophage/go-tuf/cmd/tuf/sign.go b/Godeps/_workspace/src/github.com/endophage/go-tuf/cmd/tuf/sign.go
index bcd9d0c4b8..6b18509448 100644
--- a/Godeps/_workspace/src/github.com/endophage/go-tuf/cmd/tuf/sign.go
+++ b/Godeps/_workspace/src/github.com/endophage/go-tuf/cmd/tuf/sign.go
@@ -1,8 +1,8 @@
 package main
 
 import (
-	"github.com/flynn/go-docopt"
 	"github.com/flynn/go-tuf"
+	"github.com/flynn/go-tuf/Godeps/_workspace/src/github.com/flynn/go-docopt"
 )
 
 func init() {
diff --git a/Godeps/_workspace/src/github.com/endophage/go-tuf/cmd/tuf/snapshot.go b/Godeps/_workspace/src/github.com/endophage/go-tuf/cmd/tuf/snapshot.go
index ba88c3172e..f86b07758c 100644
--- a/Godeps/_workspace/src/github.com/endophage/go-tuf/cmd/tuf/snapshot.go
+++ b/Godeps/_workspace/src/github.com/endophage/go-tuf/cmd/tuf/snapshot.go
@@ -1,8 +1,8 @@
 package main
 
 import (
-	"github.com/flynn/go-docopt"
 	"github.com/flynn/go-tuf"
+	"github.com/flynn/go-tuf/Godeps/_workspace/src/github.com/flynn/go-docopt"
 )
 
 func init() {
diff --git a/Godeps/_workspace/src/github.com/endophage/go-tuf/cmd/tuf/timestamp.go b/Godeps/_workspace/src/github.com/endophage/go-tuf/cmd/tuf/timestamp.go
index 581a6b1998..dc3e61416d 100644
--- a/Godeps/_workspace/src/github.com/endophage/go-tuf/cmd/tuf/timestamp.go
+++ b/Godeps/_workspace/src/github.com/endophage/go-tuf/cmd/tuf/timestamp.go
@@ -1,8 +1,8 @@
 package main
 
 import (
-	"github.com/flynn/go-docopt"
 	"github.com/flynn/go-tuf"
+	"github.com/flynn/go-tuf/Godeps/_workspace/src/github.com/flynn/go-docopt"
 )
 
 func init() {
diff --git a/Godeps/_workspace/src/github.com/endophage/go-tuf/data/hex_bytes_test.go b/Godeps/_workspace/src/github.com/endophage/go-tuf/data/hex_bytes_test.go
index 8c11623ece..e0700a4a2e 100644
--- a/Godeps/_workspace/src/github.com/endophage/go-tuf/data/hex_bytes_test.go
+++ b/Godeps/_workspace/src/github.com/endophage/go-tuf/data/hex_bytes_test.go
@@ -4,7 +4,7 @@ import (
 	"encoding/json"
 	"testing"
 
-	. "gopkg.in/check.v1"
+	. "github.com/endophage/go-tuf/Godeps/_workspace/src/gopkg.in/check.v1"
 )
 
 // Hook up gocheck into the "go test" runner.
diff --git a/Godeps/_workspace/src/github.com/endophage/go-tuf/data/types.go b/Godeps/_workspace/src/github.com/endophage/go-tuf/data/types.go
index 9d43185251..7afec3604c 100644
--- a/Godeps/_workspace/src/github.com/endophage/go-tuf/data/types.go
+++ b/Godeps/_workspace/src/github.com/endophage/go-tuf/data/types.go
@@ -6,20 +6,14 @@ import (
 	"encoding/json"
 	"time"
 
-	"github.com/tent/canonical-json-go"
+	cjson "github.com/endophage/go-tuf/Godeps/_workspace/src/github.com/tent/canonical-json-go"
 )
 
 const KeyIDLength = sha256.Size * 2
 
-type Signed struct {
-	Signed     json.RawMessage `json:"signed"`
-	Signatures []Signature     `json:"signatures"`
-}
-
-type Signature struct {
-	KeyID     string   `json:"keyid"`
-	Method    string   `json:"method"`
-	Signature HexBytes `json:"sig"`
+type KeyValue struct {
+	Public HexBytes `json:"public"`
+	//	Private HexBytes `json:"private,omitempty"`
 }
 
 type Key struct {
@@ -37,9 +31,15 @@ func (k *Key) ID() string {
 	return hex.EncodeToString(digest[:])
 }
 
-type KeyValue struct {
-	Public HexBytes `json:"public"`
-	//Private HexBytes `json:"private,omitempty"`
+type Signed struct {
+	Signed     json.RawMessage `json:"signed"`
+	Signatures []Signature     `json:"signatures"`
+}
+
+type Signature struct {
+	KeyID     string   `json:"keyid"`
+	Method    string   `json:"method"`
+	Signature HexBytes `json:"sig"`
 }
 
 func DefaultExpires(role string) time.Time {
@@ -82,6 +82,15 @@ type Role struct {
 	Threshold int      `json:"threshold"`
 }
 
+func (r *Role) ValidKey(id string) bool {
+	for _, key := range r.KeyIDs {
+		if key == id {
+			return true
+		}
+	}
+	return false
+}
+
 type Files map[string]FileMeta
 
 type Snapshot struct {
diff --git a/Godeps/_workspace/src/github.com/endophage/go-tuf/encrypted/encrypted.go b/Godeps/_workspace/src/github.com/endophage/go-tuf/encrypted/encrypted.go
index 4d174d61f9..dc08bf9374 100644
--- a/Godeps/_workspace/src/github.com/endophage/go-tuf/encrypted/encrypted.go
+++ b/Godeps/_workspace/src/github.com/endophage/go-tuf/encrypted/encrypted.go
@@ -12,8 +12,8 @@ import (
 	"fmt"
 	"io"
 
-	"golang.org/x/crypto/nacl/secretbox"
-	"golang.org/x/crypto/scrypt"
+	"github.com/flynn/go-tuf/Godeps/_workspace/src/golang.org/x/crypto/nacl/secretbox"
+	"github.com/flynn/go-tuf/Godeps/_workspace/src/golang.org/x/crypto/scrypt"
 )
 
 const saltSize = 32
diff --git a/Godeps/_workspace/src/github.com/endophage/go-tuf/encrypted/encrypted_test.go b/Godeps/_workspace/src/github.com/endophage/go-tuf/encrypted/encrypted_test.go
index 31b058252f..8eb57a993f 100644
--- a/Godeps/_workspace/src/github.com/endophage/go-tuf/encrypted/encrypted_test.go
+++ b/Godeps/_workspace/src/github.com/endophage/go-tuf/encrypted/encrypted_test.go
@@ -4,7 +4,7 @@ import (
 	"encoding/json"
 	"testing"
 
-	. "gopkg.in/check.v1"
+	. "github.com/flynn/go-tuf/Godeps/_workspace/src/gopkg.in/check.v1"
 )
 
 // Hook up gocheck into the "go test" runner.
diff --git a/Godeps/_workspace/src/github.com/endophage/go-tuf/errors.go b/Godeps/_workspace/src/github.com/endophage/go-tuf/errors/errors.go
similarity index 99%
rename from Godeps/_workspace/src/github.com/endophage/go-tuf/errors.go
rename to Godeps/_workspace/src/github.com/endophage/go-tuf/errors/errors.go
index 3b119046df..b5bb40a7a8 100644
--- a/Godeps/_workspace/src/github.com/endophage/go-tuf/errors.go
+++ b/Godeps/_workspace/src/github.com/endophage/go-tuf/errors/errors.go
@@ -1,4 +1,4 @@
-package tuf
+package errors
 
 import (
 	"errors"
diff --git a/Godeps/_workspace/src/github.com/endophage/go-tuf/keys/db.go b/Godeps/_workspace/src/github.com/endophage/go-tuf/keys/db.go
index 5dc620534f..aa3c14a696 100644
--- a/Godeps/_workspace/src/github.com/endophage/go-tuf/keys/db.go
+++ b/Godeps/_workspace/src/github.com/endophage/go-tuf/keys/db.go
@@ -1,10 +1,8 @@
 package keys
 
 import (
-	"crypto/rand"
 	"errors"
 
-	"github.com/agl/ed25519"
 	"github.com/endophage/go-tuf/data"
 )
 
@@ -18,79 +16,59 @@ var (
 	ErrInvalidThreshold = errors.New("tuf: invalid role threshold")
 )
 
-func NewKey() (*Key, error) {
-	pub, priv, err := ed25519.GenerateKey(rand.Reader)
-	if err != nil {
-		return nil, err
+type PublicKey struct {
+	data.Key
+	ID string
+}
+
+func NewPublicKey(keyType string, public []byte) *PublicKey {
+	// create a copy so the private key is not included
+	key := data.Key{
+		Type:  keyType,
+		Value: data.KeyValue{Public: public},
 	}
-	k := &Key{
-		Public:  *pub,
-		Private: priv,
-	}
-	k.ID = k.Serialize().ID()
-	return k, nil
+	return &PublicKey{key, key.ID()}
 }
 
-type Key struct {
-	ID     string
-	Public [ed25519.PublicKeySize]byte
-	//Private *[ed25519.PrivateKeySize]byte
-}
-
-func (k *Key) Serialize() *data.Key {
-	return &data.Key{
-		Type:  "ed25519",
-		Value: data.KeyValue{Public: k.Public[:]},
-	}
-}
-
-func (k *Key) SerializePrivate() *data.Key {
-	return &data.Key{
-		Type: "ed25519",
-		Value: data.KeyValue{
-			Public:  k.Public[:],
-			Private: k.Private[:],
-		},
-	}
-}
-
-type Role struct {
-	KeyIDs    map[string]struct{}
-	Threshold int
-}
-
-func (r *Role) ValidKey(id string) bool {
-	_, ok := r.KeyIDs[id]
-	return ok
+type PrivateKey struct {
+	PublicKey
+	Private []byte
 }
 
 type DB struct {
-	roles map[string]*Role
-	keys  map[string]*Key
+	types map[string]int
+	roles map[string]*data.Role
+	keys  map[string]*PublicKey
 }
 
 func NewDB() *DB {
 	return &DB{
-		roles: make(map[string]*Role),
-		keys:  make(map[string]*Key),
+		roles: make(map[string]*data.Role),
+		keys:  make(map[string]*PublicKey),
 	}
 }
 
-func (db *DB) AddKey(id string, k *data.Key) error {
-	if k.Type != "ed25519" {
-		return ErrWrongType
-	}
-	if id != k.ID() {
-		return ErrWrongID
-	}
-	if len(k.Value.Public) != ed25519.PublicKeySize {
-		return ErrInvalidKey
+func (db *DB) AddKey(k *PublicKey) error {
+	//if _, ok := db.types[k.Type]; !ok {
+	//	return ErrWrongType
+	//}
+	//if len(k.Value.Public) != ed25519.PublicKeySize {
+	//	return ErrInvalidKey
+	//}
+
+	key := PublicKey{
+		Key: data.Key{
+			Type: k.Type,
+			Value: data.KeyValue{
+				Public: make([]byte, len(k.Value.Public)),
+			},
+		},
+		ID: k.ID,
 	}
 
-	var key Key
-	copy(key.Public[:], k.Value.Public)
-	key.ID = id
-	db.keys[id] = &key
+	copy(key.Value.Public, k.Value.Public)
+
+	db.keys[k.ID] = &key
 	return nil
 }
 
@@ -114,25 +92,21 @@ func (db *DB) AddRole(name string, r *data.Role) error {
 		return ErrInvalidThreshold
 	}
 
-	role := &Role{
-		KeyIDs:    make(map[string]struct{}),
-		Threshold: r.Threshold,
-	}
+	// validate all key ids have the correct length
 	for _, id := range r.KeyIDs {
 		if len(id) != data.KeyIDLength {
 			return ErrInvalidKeyID
 		}
-		role.KeyIDs[id] = struct{}{}
 	}
 
-	db.roles[name] = role
+	db.roles[name] = r
 	return nil
 }
 
-func (db *DB) GetKey(id string) *Key {
+func (db *DB) GetKey(id string) *PublicKey {
 	return db.keys[id]
 }
 
-func (db *DB) GetRole(name string) *Role {
+func (db *DB) GetRole(name string) *data.Role {
 	return db.roles[name]
 }
diff --git a/Godeps/_workspace/src/github.com/endophage/go-tuf/repo.go b/Godeps/_workspace/src/github.com/endophage/go-tuf/repo.go
index a64a1047ff..0210a101c9 100644
--- a/Godeps/_workspace/src/github.com/endophage/go-tuf/repo.go
+++ b/Godeps/_workspace/src/github.com/endophage/go-tuf/repo.go
@@ -10,6 +10,7 @@ import (
 	"time"
 
 	"github.com/endophage/go-tuf/data"
+	"github.com/endophage/go-tuf/errors"
 	"github.com/endophage/go-tuf/keys"
 	"github.com/endophage/go-tuf/signed"
 	"github.com/endophage/go-tuf/store"
@@ -37,13 +38,14 @@ var snapshotManifests = []string{
 }
 
 type Repo struct {
+	trust          signed.Signer
 	local          store.LocalStore
 	hashAlgorithms []string
 	meta           map[string]json.RawMessage
 }
 
-func NewRepo(local store.LocalStore, hashAlgorithms ...string) (*Repo, error) {
-	r := &Repo{local: local, hashAlgorithms: hashAlgorithms}
+func NewRepo(trust *signed.Signer, local store.LocalStore, hashAlgorithms ...string) (*Repo, error) {
+	r := &Repo{trust: *trust, local: local, hashAlgorithms: hashAlgorithms}
 
 	var err error
 	r.meta, err = local.GetMeta()
@@ -59,7 +61,7 @@ func (r *Repo) Init(consistentSnapshot bool) error {
 		return err
 	}
 	if len(t.Targets) > 0 {
-		return ErrInitNotAllowed
+		return errors.ErrInitNotAllowed
 	}
 	root := data.NewRoot()
 	root.ConsistentSnapshot = consistentSnapshot
@@ -72,8 +74,8 @@ func (r *Repo) db() (*keys.DB, error) {
 	if err != nil {
 		return nil, err
 	}
-	for id, k := range root.Keys {
-		if err := db.AddKey(id, k); err != nil {
+	for _, k := range root.Keys {
+		if err := db.AddKey(&keys.PublicKey{*k, k.ID()}); err != nil {
 			return nil, err
 		}
 	}
@@ -94,7 +96,7 @@ func (r *Repo) root() (*data.Root, error) {
 	if err := json.Unmarshal(rootJSON, s); err != nil {
 		return nil, err
 	}
-	root := &data.Root{}
+	root := data.NewRoot()
 	if err := json.Unmarshal(s.Signed, root); err != nil {
 		return nil, err
 	}
@@ -155,11 +157,11 @@ func (r *Repo) GenKey(role string) (string, error) {
 
 func (r *Repo) GenKeyWithExpires(keyRole string, expires time.Time) (string, error) {
 	if !keys.ValidRole(keyRole) {
-		return "", ErrInvalidRole{keyRole}
+		return "", errors.ErrInvalidRole{keyRole}
 	}
 
 	if !validExpires(expires) {
-		return "", ErrInvalidExpires{expires}
+		return "", errors.ErrInvalidExpires{expires}
 	}
 
 	root, err := r.root()
@@ -167,11 +169,11 @@ func (r *Repo) GenKeyWithExpires(keyRole string, expires time.Time) (string, err
 		return "", err
 	}
 
-	key, err := keys.NewKey()
+	key, err := r.trust.NewKey()
 	if err != nil {
 		return "", err
 	}
-	if err := r.local.SaveKey(keyRole, key.SerializePrivate()); err != nil {
+	if err := r.local.SaveKey(keyRole, &key.Key); err != nil {
 		return "", err
 	}
 
@@ -182,7 +184,7 @@ func (r *Repo) GenKeyWithExpires(keyRole string, expires time.Time) (string, err
 	}
 	role.KeyIDs = append(role.KeyIDs, key.ID)
 
-	root.Keys[key.ID] = key.Serialize()
+	root.Keys[key.ID] = &key.Key
 	root.Expires = expires.Round(time.Second)
 	root.Version++
 
@@ -219,11 +221,11 @@ func (r *Repo) RevokeKey(role, id string) error {
 
 func (r *Repo) RevokeKeyWithExpires(keyRole, id string, expires time.Time) error {
 	if !keys.ValidRole(keyRole) {
-		return ErrInvalidRole{keyRole}
+		return errors.ErrInvalidRole{keyRole}
 	}
 
 	if !validExpires(expires) {
-		return ErrInvalidExpires{expires}
+		return errors.ErrInvalidExpires{expires}
 	}
 
 	root, err := r.root()
@@ -232,12 +234,12 @@ func (r *Repo) RevokeKeyWithExpires(keyRole, id string, expires time.Time) error
 	}
 
 	if _, ok := root.Keys[id]; !ok {
-		return ErrKeyNotFound{keyRole, id}
+		return errors.ErrKeyNotFound{keyRole, id}
 	}
 
 	role, ok := root.Roles[keyRole]
 	if !ok {
-		return ErrKeyNotFound{keyRole, id}
+		return errors.ErrKeyNotFound{keyRole, id}
 	}
 
 	keyIDs := make([]string, 0, len(role.KeyIDs))
@@ -248,7 +250,7 @@ func (r *Repo) RevokeKeyWithExpires(keyRole, id string, expires time.Time) error
 		keyIDs = append(keyIDs, keyID)
 	}
 	if len(keyIDs) == len(role.KeyIDs) {
-		return ErrKeyNotFound{keyRole, id}
+		return errors.ErrKeyNotFound{keyRole, id}
 	}
 	role.KeyIDs = keyIDs
 
@@ -265,7 +267,7 @@ func (r *Repo) setMeta(name string, meta interface{}) error {
 	if err != nil {
 		return err
 	}
-	s, err := signed.Marshal(meta, keys...)
+	s, err := r.trust.Marshal(meta, keys...)
 	if err != nil {
 		return err
 	}
@@ -280,7 +282,7 @@ func (r *Repo) setMeta(name string, meta interface{}) error {
 func (r *Repo) Sign(name string) error {
 	role := strings.TrimSuffix(name, ".json")
 	if !keys.ValidRole(role) {
-		return ErrInvalidRole{role}
+		return errors.ErrInvalidRole{role}
 	}
 
 	s, err := r.signedMeta(name)
@@ -293,12 +295,11 @@ func (r *Repo) Sign(name string) error {
 		return err
 	}
 	if len(keys) == 0 {
-		return ErrInsufficientKeys{name}
-	}
-	for _, k := range keys {
-		signed.Sign(s, k)
+		return errors.ErrInsufficientKeys{name}
 	}
 
+	r.trust.Sign(s, keys...)
+
 	b, err := json.Marshal(s)
 	if err != nil {
 		return err
@@ -313,13 +314,17 @@ func (r *Repo) Sign(name string) error {
 // been revoked are omitted), except for the root role in which case all local
 // keys are returned (revoked root keys still need to sign new root metadata so
 // clients can verify the new root.json and update their keys db accordingly).
-func (r *Repo) getKeys(name string) ([]*data.Key, error) {
+func (r *Repo) getKeys(name string) ([]*keys.PublicKey, error) {
 	localKeys, err := r.local.GetKeys(name)
 	if err != nil {
 		return nil, err
 	}
 	if name == "root" {
-		return localKeys, nil
+		rootkeys := make([]*keys.PublicKey, 0, len(localKeys))
+		for _, key := range localKeys {
+			rootkeys = append(rootkeys, &keys.PublicKey{*key, key.ID()})
+		}
+		return rootkeys, nil
 	}
 	db, err := r.db()
 	if err != nil {
@@ -332,19 +337,19 @@ func (r *Repo) getKeys(name string) ([]*data.Key, error) {
 	if len(role.KeyIDs) == 0 {
 		return nil, nil
 	}
-	keys := make([]*data.Key, 0, len(role.KeyIDs))
+	rolekeys := make([]*keys.PublicKey, 0, len(role.KeyIDs))
 	for _, key := range localKeys {
-		if _, ok := role.KeyIDs[key.ID()]; ok {
-			keys = append(keys, key)
+		if role.ValidKey(key.ID()) {
+			rolekeys = append(rolekeys, &keys.PublicKey{*key, key.ID()})
 		}
 	}
-	return keys, nil
+	return rolekeys, nil
 }
 
 func (r *Repo) signedMeta(name string) (*data.Signed, error) {
 	b, ok := r.meta[name]
 	if !ok {
-		return nil, ErrMissingMetadata{name}
+		return nil, errors.ErrMissingMetadata{name}
 	}
 	s := &data.Signed{}
 	if err := json.Unmarshal(b, s); err != nil {
@@ -376,7 +381,7 @@ func (r *Repo) AddTargetWithExpires(path string, custom json.RawMessage, expires
 
 func (r *Repo) AddTargetsWithExpires(paths []string, custom json.RawMessage, expires time.Time) error {
 	if !validExpires(expires) {
-		return ErrInvalidExpires{expires}
+		return errors.ErrInvalidExpires{expires}
 	}
 
 	t, err := r.targets()
@@ -388,7 +393,7 @@ func (r *Repo) AddTargetsWithExpires(paths []string, custom json.RawMessage, exp
 		normalizedPaths[i] = util.NormalizeTarget(path)
 	}
 	if err := r.local.WalkStagedTargets(normalizedPaths, func(path string, meta data.FileMeta) (err error) {
-		t.Targets[path] = meta
+		t.Targets[util.NormalizeTarget(path)] = meta
 		return nil
 	}); err != nil {
 		return err
@@ -413,7 +418,7 @@ func (r *Repo) RemoveTargetWithExpires(path string, expires time.Time) error {
 // If paths is empty, all targets will be removed.
 func (r *Repo) RemoveTargetsWithExpires(paths []string, expires time.Time) error {
 	if !validExpires(expires) {
-		return ErrInvalidExpires{expires}
+		return errors.ErrInvalidExpires{expires}
 	}
 
 	t, err := r.targets()
@@ -447,7 +452,7 @@ func (r *Repo) Snapshot(t CompressionType) error {
 
 func (r *Repo) SnapshotWithExpires(t CompressionType, expires time.Time) error {
 	if !validExpires(expires) {
-		return ErrInvalidExpires{expires}
+		return errors.ErrInvalidExpires{expires}
 	}
 
 	snapshot, err := r.snapshot()
@@ -480,7 +485,7 @@ func (r *Repo) Timestamp() error {
 
 func (r *Repo) TimestampWithExpires(expires time.Time) error {
 	if !validExpires(expires) {
-		return ErrInvalidExpires{expires}
+		return errors.ErrInvalidExpires{expires}
 	}
 
 	db, err := r.db()
@@ -535,7 +540,7 @@ func (r *Repo) Commit() error {
 	// check we have all the metadata
 	for _, name := range topLevelManifests {
 		if _, ok := r.meta[name]; !ok {
-			return ErrMissingMetadata{name}
+			return errors.ErrMissingMetadata{name}
 		}
 	}
 
@@ -546,7 +551,7 @@ func (r *Repo) Commit() error {
 	}
 	for name, role := range root.Roles {
 		if len(role.KeyIDs) < role.Threshold {
-			return ErrNotEnoughKeys{name, len(role.KeyIDs), role.Threshold}
+			return errors.ErrNotEnoughKeys{name, len(role.KeyIDs), role.Threshold}
 		}
 	}
 
@@ -611,7 +616,7 @@ func (r *Repo) verifySignature(name string, db *keys.DB) error {
 	}
 	role := strings.TrimSuffix(name, ".json")
 	if err := signed.Verify(s, role, 0, db); err != nil {
-		return ErrInsufficientSignatures{name, err}
+		return errors.ErrInsufficientSignatures{name, err}
 	}
 	return nil
 }
@@ -619,7 +624,7 @@ func (r *Repo) verifySignature(name string, db *keys.DB) error {
 func (r *Repo) fileMeta(name string) (data.FileMeta, error) {
 	b, ok := r.meta[name]
 	if !ok {
-		return data.FileMeta{}, ErrMissingMetadata{name}
+		return data.FileMeta{}, errors.ErrMissingMetadata{name}
 	}
 	return util.GenerateFileMeta(bytes.NewReader(b), r.hashAlgorithms...)
 }
diff --git a/Godeps/_workspace/src/github.com/endophage/go-tuf/repo_test.go b/Godeps/_workspace/src/github.com/endophage/go-tuf/repo_test.go
index 0453fe0918..36c84eca79 100644
--- a/Godeps/_workspace/src/github.com/endophage/go-tuf/repo_test.go
+++ b/Godeps/_workspace/src/github.com/endophage/go-tuf/repo_test.go
@@ -10,12 +10,12 @@ import (
 	"testing"
 	"time"
 
-	"github.com/agl/ed25519"
+	"github.com/endophage/go-tuf/Godeps/_workspace/src/github.com/agl/ed25519"
+	. "github.com/endophage/go-tuf/Godeps/_workspace/src/gopkg.in/check.v1"
 	"github.com/endophage/go-tuf/data"
 	"github.com/endophage/go-tuf/store"
-	. "gopkg.in/check.v1"
 	//	"github.com/endophage/go-tuf/encrypted"
-	"github.com/endophage/go-tuf/keys"
+	tuferr "github.com/endophage/go-tuf/errors"
 	"github.com/endophage/go-tuf/signed"
 	"github.com/endophage/go-tuf/util"
 )
@@ -28,6 +28,9 @@ type RepoSuite struct{}
 var _ = Suite(&RepoSuite{})
 
 func (RepoSuite) TestNewRepo(c *C) {
+	trust := signed.NewEd25519()
+	signer := signed.NewSigner(trust)
+
 	meta := map[string]json.RawMessage{
 		"root.json": []byte(`{
 		  "signed": {
@@ -75,7 +78,7 @@ func (RepoSuite) TestNewRepo(c *C) {
 		local.SetMeta(k, v)
 	}
 
-	r, err := NewRepo(local)
+	r, err := NewRepo(signer, local, "sha256")
 	c.Assert(err, IsNil)
 
 	root, err := r.root()
@@ -108,6 +111,9 @@ func (RepoSuite) TestNewRepo(c *C) {
 }
 
 func (RepoSuite) TestInit(c *C) {
+	trust := signed.NewEd25519()
+	signer := signed.NewSigner(trust)
+
 	db := util.GetSqliteDB()
 	defer util.FlushDB(db)
 	local := store.DBStore(
@@ -117,7 +123,7 @@ func (RepoSuite) TestInit(c *C) {
 	)
 	local.AddBlob("/foo.txt", util.SampleMeta())
 
-	r, err := NewRepo(local)
+	r, err := NewRepo(signer, local, "sha256")
 	c.Assert(err, IsNil)
 
 	// Init() sets root.ConsistentSnapshot
@@ -130,7 +136,7 @@ func (RepoSuite) TestInit(c *C) {
 
 	// Init() fails if targets have been added
 	c.Assert(r.AddTarget("foo.txt", nil), IsNil)
-	c.Assert(r.Init(true), Equals, ErrInitNotAllowed)
+	c.Assert(r.Init(true), Equals, tuferr.ErrInitNotAllowed)
 }
 
 func genKey(c *C, r *Repo, role string) string {
@@ -140,15 +146,18 @@ func genKey(c *C, r *Repo, role string) string {
 }
 
 func (RepoSuite) TestGenKey(c *C) {
+	trust := signed.NewEd25519()
+	signer := signed.NewSigner(trust)
+
 	sqldb := util.GetSqliteDB()
 	defer util.FlushDB(sqldb)
 	local := store.DBStore(sqldb, "")
-	r, err := NewRepo(local)
+	r, err := NewRepo(signer, local, "sha256")
 	c.Assert(err, IsNil)
 
 	// generate a key for an unknown role
 	_, err = r.GenKey("foo")
-	c.Assert(err, Equals, ErrInvalidRole{"foo"})
+	c.Assert(err, Equals, tuferr.ErrInvalidRole{"foo"})
 
 	// generate a root key
 	id := genKey(c, r, "root")
@@ -173,7 +182,7 @@ func (RepoSuite) TestGenKey(c *C) {
 	}
 	c.Assert(k.ID(), Equals, keyID)
 	c.Assert(k.Value.Public, HasLen, ed25519.PublicKeySize)
-	c.Assert(k.Value.Private, IsNil)
+	//c.Assert(k.Value.Private, IsNil)
 
 	// check root key + role are in db
 	db, err := r.db()
@@ -182,7 +191,7 @@ func (RepoSuite) TestGenKey(c *C) {
 	c.Assert(rootKey, NotNil)
 	c.Assert(rootKey.ID, Equals, keyID)
 	role := db.GetRole("root")
-	c.Assert(role.KeyIDs, DeepEquals, map[string]struct{}{keyID: {}})
+	c.Assert(role.KeyIDs, DeepEquals, []string{keyID})
 
 	// check the key was saved correctly
 	localKeys, err := local.GetKeys("root")
@@ -195,8 +204,8 @@ func (RepoSuite) TestGenKey(c *C) {
 	c.Assert(err, IsNil)
 	c.Assert(rootKeys, HasLen, 1)
 	c.Assert(rootKeys[0].ID(), Equals, rootKey.ID)
-	c.Assert(rootKeys[0].Value.Public, DeepEquals, rootKey.Serialize().Value.Public)
-	c.Assert(rootKeys[0].Value.Private, IsNil)
+	c.Assert(rootKeys[0].Value.Public, DeepEquals, rootKey.Key.Value.Public)
+	//c.Assert(rootKeys[0].Value.Private, IsNil)
 
 	// generate two targets keys
 	genKey(c, r, "targets")
@@ -212,11 +221,11 @@ func (RepoSuite) TestGenKey(c *C) {
 		c.Fatal("missing targets role")
 	}
 	c.Assert(targetsRole.KeyIDs, HasLen, 2)
-	targetKeyIDs := make(map[string]struct{}, 2)
+	targetKeyIDs := make([]string, 0, 2)
 	db, err = r.db()
 	c.Assert(err, IsNil)
 	for _, id := range targetsRole.KeyIDs {
-		targetKeyIDs[id] = struct{}{}
+		targetKeyIDs = append(targetKeyIDs, id)
 		_, ok = root.Keys[id]
 		if !ok {
 			c.Fatal("missing key")
@@ -269,17 +278,20 @@ func (RepoSuite) TestGenKey(c *C) {
 }
 
 func (RepoSuite) TestRevokeKey(c *C) {
+	trust := signed.NewEd25519()
+	signer := signed.NewSigner(trust)
+
 	db := util.GetSqliteDB()
 	defer util.FlushDB(db)
 	local := store.DBStore(db, "")
-	r, err := NewRepo(local)
+	r, err := NewRepo(signer, local, "sha256")
 	c.Assert(err, IsNil)
 
 	// revoking a key for an unknown role returns ErrInvalidRole
-	c.Assert(r.RevokeKey("foo", ""), DeepEquals, ErrInvalidRole{"foo"})
+	c.Assert(r.RevokeKey("foo", ""), DeepEquals, tuferr.ErrInvalidRole{"foo"})
 
 	// revoking a key which doesn't exist returns ErrKeyNotFound
-	c.Assert(r.RevokeKey("root", "nonexistent"), DeepEquals, ErrKeyNotFound{"root", "nonexistent"})
+	c.Assert(r.RevokeKey("root", "nonexistent"), DeepEquals, tuferr.ErrKeyNotFound{"root", "nonexistent"})
 
 	// generate keys
 	genKey(c, r, "root")
@@ -319,16 +331,19 @@ func (RepoSuite) TestRevokeKey(c *C) {
 }
 
 func (RepoSuite) TestSign(c *C) {
+	trust := signed.NewEd25519()
+	signer := signed.NewSigner(trust)
+
 	baseMeta := map[string]json.RawMessage{"root.json": []byte(`{"signed":{},"signatures":[]}`)}
 	db := util.GetSqliteDB()
 	defer util.FlushDB(db)
 	local := store.DBStore(db, "")
 	local.SetMeta("root.json", baseMeta["root.json"])
-	r, err := NewRepo(local)
+	r, err := NewRepo(signer, local, "sha256")
 	c.Assert(err, IsNil)
 
 	// signing with no keys returns ErrInsufficientKeys
-	c.Assert(r.Sign("root.json"), Equals, ErrInsufficientKeys{"root.json"})
+	c.Assert(r.Sign("root.json"), Equals, tuferr.ErrInsufficientKeys{"root.json"})
 
 	checkSigIDs := func(keyIDs ...string) {
 		meta, err := local.GetMeta()
@@ -341,8 +356,6 @@ func (RepoSuite) TestSign(c *C) {
 		}
 		s := &data.Signed{}
 		c.Assert(json.Unmarshal(rootJSON, s), IsNil)
-		fmt.Println("Len Signatures", len(s.Signatures))
-		fmt.Println("Len KeyIDs", len(keyIDs))
 		c.Assert(s.Signatures, HasLen, len(keyIDs))
 		for i, id := range keyIDs {
 			c.Assert(s.Signatures[i].KeyID, Equals, id)
@@ -350,53 +363,58 @@ func (RepoSuite) TestSign(c *C) {
 	}
 
 	// signing with an available key generates a signature
-	key, err := keys.NewKey()
+	//key, err := signer.NewKey()
+	kID, err := r.GenKey("root")
 	c.Assert(err, IsNil)
-	c.Assert(local.SaveKey("root", key.SerializePrivate()), IsNil)
+	//c.Assert(local.SaveKey("root", key.SerializePrivate()), IsNil)
 	c.Assert(r.Sign("root.json"), IsNil)
-	checkSigIDs(key.ID)
+	checkSigIDs(kID)
 
 	// signing again does not generate a duplicate signature
 	c.Assert(r.Sign("root.json"), IsNil)
-	checkSigIDs(key.ID)
+	checkSigIDs(kID)
 
 	// signing with a new available key generates another signature
-	newKey, err := keys.NewKey()
+	//newKey, err := signer.NewKey()
+	newkID, err := r.GenKey("root")
 	c.Assert(err, IsNil)
-	c.Assert(local.SaveKey("root", newKey.SerializePrivate()), IsNil)
+	//c.Assert(local.SaveKey("root", newKey.SerializePrivate()), IsNil)
 	c.Assert(r.Sign("root.json"), IsNil)
-	checkSigIDs(key.ID, newKey.ID)
+	checkSigIDs(kID, newkID)
 }
 
 func (RepoSuite) TestCommit(c *C) {
+	trust := signed.NewEd25519()
+	signer := signed.NewSigner(trust)
+
 	//files := map[string][]byte{"/foo.txt": []byte("foo"), "/bar.txt": []byte("bar")}
 	db := util.GetSqliteDB()
 	defer util.FlushDB(db)
 	local := store.DBStore(db, "")
-	r, err := NewRepo(local)
+	r, err := NewRepo(signer, local, "sha256")
 	c.Assert(err, IsNil)
 
 	// commit without root.json
-	c.Assert(r.Commit(), DeepEquals, ErrMissingMetadata{"root.json"})
+	c.Assert(r.Commit(), DeepEquals, tuferr.ErrMissingMetadata{"root.json"})
 
 	// commit without targets.json
 	genKey(c, r, "root")
-	c.Assert(r.Commit(), DeepEquals, ErrMissingMetadata{"targets.json"})
+	c.Assert(r.Commit(), DeepEquals, tuferr.ErrMissingMetadata{"targets.json"})
 
 	// commit without snapshot.json
 	genKey(c, r, "targets")
 	local.AddBlob("/foo.txt", util.SampleMeta())
 	c.Assert(r.AddTarget("foo.txt", nil), IsNil)
-	c.Assert(r.Commit(), DeepEquals, ErrMissingMetadata{"snapshot.json"})
+	c.Assert(r.Commit(), DeepEquals, tuferr.ErrMissingMetadata{"snapshot.json"})
 
 	// commit without timestamp.json
 	genKey(c, r, "snapshot")
 	c.Assert(r.Snapshot(CompressionTypeNone), IsNil)
-	c.Assert(r.Commit(), DeepEquals, ErrMissingMetadata{"timestamp.json"})
+	c.Assert(r.Commit(), DeepEquals, tuferr.ErrMissingMetadata{"timestamp.json"})
 
 	// commit with timestamp.json but no timestamp key
 	c.Assert(r.Timestamp(), IsNil)
-	c.Assert(r.Commit(), DeepEquals, ErrInsufficientSignatures{"timestamp.json", signed.ErrNoSignatures})
+	c.Assert(r.Commit(), DeepEquals, tuferr.ErrInsufficientSignatures{"timestamp.json", signed.ErrNoSignatures})
 
 	// commit success
 	genKey(c, r, "timestamp")
@@ -436,7 +454,7 @@ func (RepoSuite) TestCommit(c *C) {
 	c.Assert(r.RevokeKey("timestamp", role.KeyIDs[0]), IsNil)
 	c.Assert(r.Snapshot(CompressionTypeNone), IsNil)
 	c.Assert(r.Timestamp(), IsNil)
-	c.Assert(r.Commit(), DeepEquals, ErrNotEnoughKeys{"timestamp", 0, 1})
+	c.Assert(r.Commit(), DeepEquals, tuferr.ErrNotEnoughKeys{"timestamp", 0, 1})
 }
 
 type tmpDir struct {
@@ -512,147 +530,154 @@ func (t *tmpDir) readFile(path string) []byte {
 	return data
 }
 
-//func (RepoSuite) TestCommitFileSystem(c *C) {
-//	tmp := newTmpDir(c)
-//	local := FileSystemStore(tmp.path, nil)
-//	r, err := NewRepo(local)
-//	c.Assert(err, IsNil)
-//
-//	// don't use consistent snapshots to make the checks simpler
-//	c.Assert(r.Init(false), IsNil)
-//
-//	// generating keys should stage root.json and create repo dirs
-//	genKey(c, r, "root")
-//	genKey(c, r, "targets")
-//	genKey(c, r, "snapshot")
-//	genKey(c, r, "timestamp")
-//	tmp.assertExists("staged/root.json")
-//	tmp.assertEmpty("repository")
-//	tmp.assertEmpty("staged/targets")
-//
-//	// adding a non-existent file fails
-//	c.Assert(r.AddTarget("foo.txt", nil), Equals, ErrFileNotFound{tmp.stagedTargetPath("foo.txt")})
-//	tmp.assertEmpty("repository")
-//
-//	// adding a file stages targets.json
-//	tmp.writeStagedTarget("foo.txt", "foo")
-//	c.Assert(r.AddTarget("foo.txt", nil), IsNil)
-//	tmp.assertExists("staged/targets.json")
-//	tmp.assertEmpty("repository")
-//	t, err := r.targets()
-//	c.Assert(err, IsNil)
-//	c.Assert(t.Targets, HasLen, 1)
-//	if _, ok := t.Targets["/foo.txt"]; !ok {
-//		c.Fatal("missing target file: /foo.txt")
-//	}
-//
-//	// Snapshot() stages snapshot.json
-//	c.Assert(r.Snapshot(CompressionTypeNone), IsNil)
-//	tmp.assertExists("staged/snapshot.json")
-//	tmp.assertEmpty("repository")
-//
-//	// Timestamp() stages timestamp.json
-//	c.Assert(r.Timestamp(), IsNil)
-//	tmp.assertExists("staged/timestamp.json")
-//	tmp.assertEmpty("repository")
-//
-//	// committing moves files from staged -> repository
-//	c.Assert(r.Commit(), IsNil)
-//	tmp.assertExists("repository/root.json")
-//	tmp.assertExists("repository/targets.json")
-//	tmp.assertExists("repository/snapshot.json")
-//	tmp.assertExists("repository/timestamp.json")
-//	tmp.assertFileContent("repository/targets/foo.txt", "foo")
-//	tmp.assertEmpty("staged/targets")
-//	tmp.assertEmpty("staged")
-//
-//	// adding and committing another file moves it into repository/targets
-//	tmp.writeStagedTarget("path/to/bar.txt", "bar")
-//	c.Assert(r.AddTarget("path/to/bar.txt", nil), IsNil)
-//	tmp.assertExists("staged/targets.json")
-//	c.Assert(r.Snapshot(CompressionTypeNone), IsNil)
-//	c.Assert(r.Timestamp(), IsNil)
-//	c.Assert(r.Commit(), IsNil)
-//	tmp.assertFileContent("repository/targets/foo.txt", "foo")
-//	tmp.assertFileContent("repository/targets/path/to/bar.txt", "bar")
-//	tmp.assertEmpty("staged/targets")
-//	tmp.assertEmpty("staged")
-//
-//	// removing and committing a file removes it from repository/targets
-//	c.Assert(r.RemoveTarget("foo.txt"), IsNil)
-//	tmp.assertExists("staged/targets.json")
-//	c.Assert(r.Snapshot(CompressionTypeNone), IsNil)
-//	c.Assert(r.Timestamp(), IsNil)
-//	c.Assert(r.Commit(), IsNil)
-//	tmp.assertNotExist("repository/targets/foo.txt")
-//	tmp.assertFileContent("repository/targets/path/to/bar.txt", "bar")
-//	tmp.assertEmpty("staged/targets")
-//	tmp.assertEmpty("staged")
-//}
-//
-//func (RepoSuite) TestConsistentSnapshot(c *C) {
-//	tmp := newTmpDir(c)
-//	local := FileSystemStore(tmp.path, nil)
-//	r, err := NewRepo(local, "sha512", "sha256")
-//	c.Assert(err, IsNil)
-//
-//	genKey(c, r, "root")
-//	genKey(c, r, "targets")
-//	genKey(c, r, "snapshot")
-//	genKey(c, r, "timestamp")
-//	tmp.writeStagedTarget("foo.txt", "foo")
-//	c.Assert(r.AddTarget("foo.txt", nil), IsNil)
-//	tmp.writeStagedTarget("dir/bar.txt", "bar")
-//	c.Assert(r.AddTarget("dir/bar.txt", nil), IsNil)
-//	c.Assert(r.Snapshot(CompressionTypeNone), IsNil)
-//	c.Assert(r.Timestamp(), IsNil)
-//	c.Assert(r.Commit(), IsNil)
-//
-//	hashes, err := r.fileHashes()
-//	c.Assert(err, IsNil)
-//
-//	// root.json, targets.json and snapshot.json should exist at both hashed and unhashed paths
-//	for _, path := range []string{"root.json", "targets.json", "snapshot.json"} {
-//		repoPath := filepath.Join("repository", path)
-//		tmp.assertHashedFilesExist(repoPath, hashes[path])
-//		tmp.assertExists(repoPath)
-//	}
-//
-//	// target files should exist at hashed but not unhashed paths
-//	for _, path := range []string{"targets/foo.txt", "targets/dir/bar.txt"} {
-//		repoPath := filepath.Join("repository", path)
-//		tmp.assertHashedFilesExist(repoPath, hashes[path])
-//		tmp.assertNotExist(repoPath)
-//	}
-//
-//	// timestamp.json should exist at an unhashed path (it doesn't have a hash)
-//	tmp.assertExists("repository/timestamp.json")
-//
-//	// removing a file should remove the hashed files
-//	c.Assert(r.RemoveTarget("foo.txt"), IsNil)
-//	c.Assert(r.Snapshot(CompressionTypeNone), IsNil)
-//	c.Assert(r.Timestamp(), IsNil)
-//	c.Assert(r.Commit(), IsNil)
-//	tmp.assertHashedFilesNotExist("repository/targets/foo.txt", hashes["targets/foo.txt"])
-//	tmp.assertNotExist("repository/targets/foo.txt")
-//
-//	// targets should be returned by new repo
-//	newRepo, err := NewRepo(local, "sha512", "sha256")
-//	c.Assert(err, IsNil)
-//	t, err := newRepo.targets()
-//	c.Assert(err, IsNil)
-//	c.Assert(t.Targets, HasLen, 1)
-//	if _, ok := t.Targets["/dir/bar.txt"]; !ok {
-//		c.Fatal("missing targets file: dir/bar.txt")
-//	}
-//}
+func (RepoSuite) TestCommitFileSystem(c *C) {
+	trust := signed.NewEd25519()
+	signer := signed.NewSigner(trust)
+	tmp := newTmpDir(c)
+	local := store.FileSystemStore(tmp.path, nil)
+	r, err := NewRepo(signer, local, "sha256")
+	c.Assert(err, IsNil)
+
+	// don't use consistent snapshots to make the checks simpler
+	c.Assert(r.Init(false), IsNil)
+
+	// generating keys should stage root.json and create repo dirs
+	genKey(c, r, "root")
+	genKey(c, r, "targets")
+	genKey(c, r, "snapshot")
+	genKey(c, r, "timestamp")
+	tmp.assertExists("staged/root.json")
+	tmp.assertEmpty("repository")
+	tmp.assertEmpty("staged/targets")
+
+	// adding a non-existent file fails
+	c.Assert(r.AddTarget("foo.txt", nil), Equals, tuferr.ErrFileNotFound{tmp.stagedTargetPath("foo.txt")})
+	tmp.assertEmpty("repository")
+
+	// adding a file stages targets.json
+	tmp.writeStagedTarget("foo.txt", "foo")
+	c.Assert(r.AddTarget("foo.txt", nil), IsNil)
+	tmp.assertExists("staged/targets.json")
+	tmp.assertEmpty("repository")
+	t, err := r.targets()
+	c.Assert(err, IsNil)
+	c.Assert(t.Targets, HasLen, 1)
+	if _, ok := t.Targets["/foo.txt"]; !ok {
+		c.Fatal("missing target file: /foo.txt")
+	}
+
+	// Snapshot() stages snapshot.json
+	c.Assert(r.Snapshot(CompressionTypeNone), IsNil)
+	tmp.assertExists("staged/snapshot.json")
+	tmp.assertEmpty("repository")
+
+	// Timestamp() stages timestamp.json
+	c.Assert(r.Timestamp(), IsNil)
+	tmp.assertExists("staged/timestamp.json")
+	tmp.assertEmpty("repository")
+
+	// committing moves files from staged -> repository
+	c.Assert(r.Commit(), IsNil)
+	tmp.assertExists("repository/root.json")
+	tmp.assertExists("repository/targets.json")
+	tmp.assertExists("repository/snapshot.json")
+	tmp.assertExists("repository/timestamp.json")
+	tmp.assertFileContent("repository/targets/foo.txt", "foo")
+	tmp.assertEmpty("staged/targets")
+	tmp.assertEmpty("staged")
+
+	// adding and committing another file moves it into repository/targets
+	tmp.writeStagedTarget("path/to/bar.txt", "bar")
+	c.Assert(r.AddTarget("path/to/bar.txt", nil), IsNil)
+	tmp.assertExists("staged/targets.json")
+	c.Assert(r.Snapshot(CompressionTypeNone), IsNil)
+	c.Assert(r.Timestamp(), IsNil)
+	c.Assert(r.Commit(), IsNil)
+	tmp.assertFileContent("repository/targets/foo.txt", "foo")
+	tmp.assertFileContent("repository/targets/path/to/bar.txt", "bar")
+	tmp.assertEmpty("staged/targets")
+	tmp.assertEmpty("staged")
+
+	// removing and committing a file removes it from repository/targets
+	c.Assert(r.RemoveTarget("foo.txt"), IsNil)
+	tmp.assertExists("staged/targets.json")
+	c.Assert(r.Snapshot(CompressionTypeNone), IsNil)
+	c.Assert(r.Timestamp(), IsNil)
+	c.Assert(r.Commit(), IsNil)
+	tmp.assertNotExist("repository/targets/foo.txt")
+	tmp.assertFileContent("repository/targets/path/to/bar.txt", "bar")
+	tmp.assertEmpty("staged/targets")
+	tmp.assertEmpty("staged")
+}
+
+func (RepoSuite) TestConsistentSnapshot(c *C) {
+	trust := signed.NewEd25519()
+	signer := signed.NewSigner(trust)
+	tmp := newTmpDir(c)
+	local := store.FileSystemStore(tmp.path, nil)
+	r, err := NewRepo(signer, local, "sha512", "sha256")
+	c.Assert(err, IsNil)
+
+	genKey(c, r, "root")
+	genKey(c, r, "targets")
+	genKey(c, r, "snapshot")
+	genKey(c, r, "timestamp")
+	tmp.writeStagedTarget("foo.txt", "foo")
+	c.Assert(r.AddTarget("foo.txt", nil), IsNil)
+	tmp.writeStagedTarget("dir/bar.txt", "bar")
+	c.Assert(r.AddTarget("dir/bar.txt", nil), IsNil)
+	c.Assert(r.Snapshot(CompressionTypeNone), IsNil)
+	c.Assert(r.Timestamp(), IsNil)
+	c.Assert(r.Commit(), IsNil)
+
+	hashes, err := r.fileHashes()
+	c.Assert(err, IsNil)
+
+	// root.json, targets.json and snapshot.json should exist at both hashed and unhashed paths
+	for _, path := range []string{"root.json", "targets.json", "snapshot.json"} {
+		repoPath := filepath.Join("repository", path)
+		tmp.assertHashedFilesExist(repoPath, hashes[path])
+		tmp.assertExists(repoPath)
+	}
+
+	// target files should exist at hashed but not unhashed paths
+	for _, path := range []string{"targets/foo.txt", "targets/dir/bar.txt"} {
+		repoPath := filepath.Join("repository", path)
+		tmp.assertHashedFilesExist(repoPath, hashes[path])
+		tmp.assertNotExist(repoPath)
+	}
+
+	// timestamp.json should exist at an unhashed path (it doesn't have a hash)
+	tmp.assertExists("repository/timestamp.json")
+
+	// removing a file should remove the hashed files
+	c.Assert(r.RemoveTarget("foo.txt"), IsNil)
+	c.Assert(r.Snapshot(CompressionTypeNone), IsNil)
+	c.Assert(r.Timestamp(), IsNil)
+	c.Assert(r.Commit(), IsNil)
+	tmp.assertHashedFilesNotExist("repository/targets/foo.txt", hashes["targets/foo.txt"])
+	tmp.assertNotExist("repository/targets/foo.txt")
+
+	// targets should be returned by new repo
+	newRepo, err := NewRepo(signer, local, "sha512", "sha256")
+	c.Assert(err, IsNil)
+	t, err := newRepo.targets()
+	c.Assert(err, IsNil)
+	c.Assert(t.Targets, HasLen, 1)
+	if _, ok := t.Targets["/dir/bar.txt"]; !ok {
+		c.Fatal("missing targets file: dir/bar.txt")
+	}
+}
 
 func (RepoSuite) TestExpiresAndVersion(c *C) {
+	trust := signed.NewEd25519()
+	signer := signed.NewSigner(trust)
+
 	//files := map[string][]byte{"/foo.txt": []byte("foo")}
 	db := util.GetSqliteDB()
 	defer util.FlushDB(db)
 	local := store.DBStore(db, "")
-	r, err := NewRepo(local)
+	r, err := NewRepo(signer, local, "sha256")
 	c.Assert(err, IsNil)
 
 	past := time.Now().Add(-1 * time.Second)
@@ -664,7 +689,7 @@ func (RepoSuite) TestExpiresAndVersion(c *C) {
 		r.SnapshotWithExpires(CompressionTypeNone, past),
 		r.TimestampWithExpires(past),
 	} {
-		c.Assert(err, Equals, ErrInvalidExpires{past})
+		c.Assert(err, Equals, tuferr.ErrInvalidExpires{past})
 	}
 
 	genKey(c, r, "root")
@@ -736,6 +761,9 @@ func (RepoSuite) TestExpiresAndVersion(c *C) {
 }
 
 func (RepoSuite) TestHashAlgorithm(c *C) {
+	trust := signed.NewEd25519()
+	signer := signed.NewSigner(trust)
+
 	//files := map[string][]byte{"/foo.txt": []byte("foo")}
 	db := util.GetSqliteDB()
 	defer util.FlushDB(db)
@@ -750,7 +778,7 @@ func (RepoSuite) TestHashAlgorithm(c *C) {
 		{args: []string{"sha512", "sha256"}},
 	} {
 		// generate metadata with specific hash functions
-		r, err := NewRepo(local, test.args...)
+		r, err := NewRepo(signer, local, test.args...)
 		c.Assert(err, IsNil)
 		genKey(c, r, "root")
 		genKey(c, r, "targets")
@@ -851,67 +879,69 @@ func testPassphraseFunc(p []byte) util.PassphraseFunc {
 //	c.Assert(insecureStore.SaveKey("targets", key.SerializePrivate()), IsNil)
 //	assertKeys("targets", false, []*keys.Key{key})
 //}
-//
-//func (RepoSuite) TestManageMultipleTargets(c *C) {
-//	tmp := newTmpDir(c)
-//	local := FileSystemStore(tmp.path, nil)
-//	r, err := NewRepo(local)
-//	c.Assert(err, IsNil)
-//	// don't use consistent snapshots to make the checks simpler
-//	c.Assert(r.Init(false), IsNil)
-//	genKey(c, r, "root")
-//	genKey(c, r, "targets")
-//	genKey(c, r, "snapshot")
-//	genKey(c, r, "timestamp")
-//
-//	assertRepoTargets := func(paths ...string) {
-//		t, err := r.targets()
-//		c.Assert(err, IsNil)
-//		for _, path := range paths {
-//			if _, ok := t.Targets[path]; !ok {
-//				c.Fatalf("missing target file: %s", path)
-//			}
-//		}
-//	}
-//
-//	// adding and committing multiple files moves correct targets from staged -> repository
-//	tmp.writeStagedTarget("foo.txt", "foo")
-//	tmp.writeStagedTarget("bar.txt", "bar")
-//	c.Assert(r.AddTargets([]string{"foo.txt", "bar.txt"}, nil), IsNil)
-//	c.Assert(r.Snapshot(CompressionTypeNone), IsNil)
-//	c.Assert(r.Timestamp(), IsNil)
-//	c.Assert(r.Commit(), IsNil)
-//	assertRepoTargets("/foo.txt", "/bar.txt")
-//	tmp.assertExists("repository/targets/foo.txt")
-//	tmp.assertExists("repository/targets/bar.txt")
-//
-//	// adding all targets moves them all from staged -> repository
-//	count := 10
-//	files := make([]string, count)
-//	for i := 0; i < count; i++ {
-//		files[i] = fmt.Sprintf("/file%d.txt", i)
-//		tmp.writeStagedTarget(files[i], "data")
-//	}
-//	c.Assert(r.AddTargets(nil, nil), IsNil)
-//	c.Assert(r.Snapshot(CompressionTypeNone), IsNil)
-//	c.Assert(r.Timestamp(), IsNil)
-//	c.Assert(r.Commit(), IsNil)
-//	tmp.assertExists("repository/targets/foo.txt")
-//	tmp.assertExists("repository/targets/bar.txt")
-//	assertRepoTargets(files...)
-//	for _, file := range files {
-//		tmp.assertExists("repository/targets/" + file)
-//	}
-//	tmp.assertEmpty("staged/targets")
-//	tmp.assertEmpty("staged")
-//
-//	// removing all targets removes them from the repository and targets.json
-//	c.Assert(r.RemoveTargets(nil), IsNil)
-//	c.Assert(r.Snapshot(CompressionTypeNone), IsNil)
-//	c.Assert(r.Timestamp(), IsNil)
-//	c.Assert(r.Commit(), IsNil)
-//	tmp.assertEmpty("repository/targets")
-//	t, err := r.targets()
-//	c.Assert(err, IsNil)
-//	c.Assert(t.Targets, HasLen, 0)
-//}
+
+func (RepoSuite) TestManageMultipleTargets(c *C) {
+	trust := signed.NewEd25519()
+	signer := signed.NewSigner(trust)
+	tmp := newTmpDir(c)
+	local := store.FileSystemStore(tmp.path, nil)
+	r, err := NewRepo(signer, local)
+	c.Assert(err, IsNil)
+	// don't use consistent snapshots to make the checks simpler
+	c.Assert(r.Init(false), IsNil)
+	genKey(c, r, "root")
+	genKey(c, r, "targets")
+	genKey(c, r, "snapshot")
+	genKey(c, r, "timestamp")
+
+	assertRepoTargets := func(paths ...string) {
+		t, err := r.targets()
+		c.Assert(err, IsNil)
+		for _, path := range paths {
+			if _, ok := t.Targets[path]; !ok {
+				c.Fatalf("missing target file: %s", path)
+			}
+		}
+	}
+
+	// adding and committing multiple files moves correct targets from staged -> repository
+	tmp.writeStagedTarget("foo.txt", "foo")
+	tmp.writeStagedTarget("bar.txt", "bar")
+	c.Assert(r.AddTargets([]string{"foo.txt", "bar.txt"}, nil), IsNil)
+	c.Assert(r.Snapshot(CompressionTypeNone), IsNil)
+	c.Assert(r.Timestamp(), IsNil)
+	c.Assert(r.Commit(), IsNil)
+	assertRepoTargets("/foo.txt", "/bar.txt")
+	tmp.assertExists("repository/targets/foo.txt")
+	tmp.assertExists("repository/targets/bar.txt")
+
+	// adding all targets moves them all from staged -> repository
+	count := 10
+	files := make([]string, count)
+	for i := 0; i < count; i++ {
+		files[i] = fmt.Sprintf("/file%d.txt", i)
+		tmp.writeStagedTarget(files[i], "data")
+	}
+	c.Assert(r.AddTargets(nil, nil), IsNil)
+	c.Assert(r.Snapshot(CompressionTypeNone), IsNil)
+	c.Assert(r.Timestamp(), IsNil)
+	c.Assert(r.Commit(), IsNil)
+	tmp.assertExists("repository/targets/foo.txt")
+	tmp.assertExists("repository/targets/bar.txt")
+	assertRepoTargets(files...)
+	for _, file := range files {
+		tmp.assertExists("repository/targets/" + file)
+	}
+	tmp.assertEmpty("staged/targets")
+	tmp.assertEmpty("staged")
+
+	// removing all targets removes them from the repository and targets.json
+	c.Assert(r.RemoveTargets(nil), IsNil)
+	c.Assert(r.Snapshot(CompressionTypeNone), IsNil)
+	c.Assert(r.Timestamp(), IsNil)
+	c.Assert(r.Commit(), IsNil)
+	tmp.assertEmpty("repository/targets")
+	t, err := r.targets()
+	c.Assert(err, IsNil)
+	c.Assert(t.Targets, HasLen, 0)
+}
diff --git a/Godeps/_workspace/src/github.com/endophage/go-tuf/signed/interface.go b/Godeps/_workspace/src/github.com/endophage/go-tuf/signed/interface.go
index 5a21e8a7bc..1b69e538a3 100644
--- a/Godeps/_workspace/src/github.com/endophage/go-tuf/signed/interface.go
+++ b/Godeps/_workspace/src/github.com/endophage/go-tuf/signed/interface.go
@@ -5,7 +5,16 @@ import (
 	"github.com/endophage/go-tuf/keys"
 )
 
-type Signer interface {
-	GetPublicKeys(keyIDs ...string) (map[string]keys.Key, error)
-	Sign(keyIDs []string, data json.RawMessage) ([]data.Signature, error)
+type SigningService interface {
+	Sign(keyIDs []string, data []byte) ([]data.Signature, error)
+}
+
+type KeyService interface {
+	Create() (*keys.PublicKey, error)
+	PublicKeys(keyIDs ...string) (map[string]*keys.PublicKey, error)
+}
+
+type TrustService interface {
+	SigningService
+	KeyService
 }
diff --git a/Godeps/_workspace/src/github.com/endophage/go-tuf/signed/sign.go b/Godeps/_workspace/src/github.com/endophage/go-tuf/signed/sign.go
index e1fda0ea91..603ce4b59c 100644
--- a/Godeps/_workspace/src/github.com/endophage/go-tuf/signed/sign.go
+++ b/Godeps/_workspace/src/github.com/endophage/go-tuf/signed/sign.go
@@ -1,40 +1,78 @@
 package signed
 
 import (
-	"github.com/agl/ed25519"
+	cjson "github.com/endophage/go-tuf/Godeps/_workspace/src/github.com/tent/canonical-json-go"
+
 	"github.com/endophage/go-tuf/data"
-	cjson "github.com/tent/canonical-json-go"
+	"github.com/endophage/go-tuf/keys"
 )
 
 // Sign takes a data.Signed and a key, calculated and adds the signature
 // to the data.Signed
-func Sign(s *data.Signed, k *data.Key) {
-	id := k.ID()
+//func Sign(s *data.Signed, k *data.Key) {
+//	id := k.ID()
+//	signatures := make([]data.Signature, 0, len(s.Signatures)+1)
+//	for _, sig := range s.Signatures {
+//		if sig.KeyID == id {
+//			continue
+//		}
+//		signatures = append(signatures, sig)
+//	}
+//	priv := [ed25519.PrivateKeySize]byte{}
+//	copy(priv[:], k.Value.Private)
+//	sig := ed25519.Sign(&priv, s.Signed)
+//	s.Signatures = append(signatures, data.Signature{
+//		KeyID:     id,
+//		Method:    "ed25519",
+//		Signature: sig[:],
+//	})
+//}
+
+// Signer encapsulates a signing service with some convenience methods to
+// interface between TUF keys and the generic service interface
+type Signer struct {
+	service TrustService
+}
+
+func NewSigner(service TrustService) *Signer {
+	return &Signer{service}
+}
+
+// Sign takes a data.Signed and a key, calculated and adds the signature
+// to the data.Signed
+func (signer *Signer) Sign(s *data.Signed, keys ...*keys.PublicKey) error {
 	signatures := make([]data.Signature, 0, len(s.Signatures)+1)
+	keyIDMemb := make(map[string]struct{})
+	keyIDs := make([]string, 0, len(keys))
+	for _, key := range keys {
+		keyIDMemb[key.ID] = struct{}{}
+		keyIDs = append(keyIDs, key.ID)
+	}
 	for _, sig := range s.Signatures {
-		if sig.KeyID == id {
+		if _, ok := keyIDMemb[sig.KeyID]; ok {
 			continue
 		}
 		signatures = append(signatures, sig)
 	}
-	priv := [ed25519.PrivateKeySize]byte{}
-	copy(priv[:], k.Value.Private)
-	sig := ed25519.Sign(&priv, s.Signed)
-	s.Signatures = append(signatures, data.Signature{
-		KeyID:     id,
-		Method:    "ed25519",
-		Signature: sig[:],
-	})
+	newSigs, err := signer.service.Sign(keyIDs, s.Signed)
+
+	if err != nil {
+		return err
+	}
+	s.Signatures = append(signatures, newSigs...)
+	return nil
 }
 
-func Marshal(v interface{}, keys ...*data.Key) (*data.Signed, error) {
+func (signer *Signer) Marshal(v interface{}, keys ...*keys.PublicKey) (*data.Signed, error) {
 	b, err := cjson.Marshal(v)
 	if err != nil {
 		return nil, err
 	}
 	s := &data.Signed{Signed: b}
-	for _, k := range keys {
-		Sign(s, k)
-	}
-	return s, nil
+	err = signer.Sign(s, keys...)
+	return s, err // err may be nil but there's no point in checking, just return it
+}
+
+func (signer *Signer) NewKey() (*keys.PublicKey, error) {
+	return signer.service.Create()
 }
diff --git a/Godeps/_workspace/src/github.com/endophage/go-tuf/signed/sign_test.go b/Godeps/_workspace/src/github.com/endophage/go-tuf/signed/sign_test.go
new file mode 100644
index 0000000000..dae242c6b8
--- /dev/null
+++ b/Godeps/_workspace/src/github.com/endophage/go-tuf/signed/sign_test.go
@@ -0,0 +1,113 @@
+package signed
+
+import (
+	"testing"
+
+	"github.com/endophage/go-tuf/data"
+	"github.com/endophage/go-tuf/keys"
+)
+
+type MockTrustService struct {
+	testSig data.Signature
+	testKey keys.PublicKey
+}
+
+func (mts *MockTrustService) Sign(keyIDs []string, data []byte) ([]data.Signature, error) {
+	sigs := []data.Signature{mts.testSig}
+	return sigs, nil
+}
+
+func (mts *MockTrustService) Create(keyType string) (keys.PublicKey, error) {
+	return keys.PublicKey{mts.testKey}, nil
+}
+
+func (mts *MockTrustService) PublicKeys(keyIDs ...string) (map[string]keys.PublicKey, error) {
+	keys := map[string]keys.PublicKey{"testID": mts.testKey}
+	return keys, nil
+}
+
+var _ TrustService = &MockTrustService{}
+
+// Test signing and ensure the expected signature is added
+func TestBasicSign(t *testing.T) {
+	signer := Signer{&MockTrustService{
+		testSig: data.Signature{KeyID: "testID"},
+		testKey: keys.PublicKey{},
+	}}
+	key := keys.PublicKey{}
+	testData := data.Signed{}
+
+	signer.Sign(&testData, &key)
+
+	if len(testData.Signatures) != 1 {
+		t.Fatalf("Incorrect number of signatures: %d", len(testData.Signatures))
+	}
+
+	if testData.Signatures[0].KeyID != "testID" {
+		t.Fatalf("Wrong signature ID returned: %s", testData.Signatures[0].KeyID)
+	}
+
+}
+
+// Test signing with the same key multiple times only registers a single signature
+// for the key (N.B. MockTrustService.Sign will still be called again, but Signer.Sign
+// should be cleaning previous signatures by the KeyID when asked to sign again)
+func TestReSign(t *testing.T) {
+	signer := Signer{&MockTrustService{
+		testSig: data.Signature{KeyID: "testID"},
+		testKey: keys.PublicKey{},
+	}}
+	key := keys.PublicKey{ID: "testID"}
+	testData := data.Signed{}
+
+	signer.Sign(&testData, &key)
+	signer.Sign(&testData, &key)
+
+	if len(testData.Signatures) != 1 {
+		t.Fatalf("Incorrect number of signatures: %d", len(testData.Signatures))
+	}
+
+	if testData.Signatures[0].KeyID != "testID" {
+		t.Fatalf("Wrong signature ID returned: %s", testData.Signatures[0].KeyID)
+	}
+
+}
+
+func TestMultiSign(t *testing.T) {
+	signer := Signer{&MockTrustService{
+		testSig: data.Signature{KeyID: "testID"},
+		testKey: keys.PublicKey{},
+	}}
+	key := keys.PublicKey{ID: "testID1"}
+	testData := data.Signed{}
+
+	signer.Sign(&testData, &key)
+
+	key = keys.PublicKey{ID: "testID2"}
+	signer.Sign(&testData, &key)
+
+	if len(testData.Signatures) != 2 {
+		t.Fatalf("Incorrect number of signatures: %d", len(testData.Signatures))
+	}
+
+	keyIDs := map[string]struct{}{"testID1": struct{}{}, "testID2": struct{}{}}
+	for _, sig := range testData.Signatures {
+		if _, ok := keyIDs[sig.KeyID]; !ok {
+			t.Fatalf("Got a signature we didn't expect: %s", sig.KeyID)
+		}
+	}
+
+}
+
+func TestNewKey(t *testing.T) {
+	signer := Signer{&MockTrustService{
+		testSig: data.Signature{},
+		testKey: keys.PublicKey{ID: "testID"},
+	}}
+
+	key := signer.NewKey("testType")
+
+	if key.ID != "testID" {
+		t.Fatalf("Expected key ID not found: %s", key.ID)
+	}
+}
diff --git a/Godeps/_workspace/src/github.com/endophage/go-tuf/signed/trust.go b/Godeps/_workspace/src/github.com/endophage/go-tuf/signed/trust.go
new file mode 100644
index 0000000000..ed644ce357
--- /dev/null
+++ b/Godeps/_workspace/src/github.com/endophage/go-tuf/signed/trust.go
@@ -0,0 +1,89 @@
+package signed
+
+import (
+	"crypto/rand"
+
+	"github.com/endophage/go-tuf/Godeps/_workspace/src/github.com/agl/ed25519"
+	"github.com/endophage/go-tuf/data"
+	"github.com/endophage/go-tuf/keys"
+)
+
+// Ed25519 implements a simple in memory keystore and trust service
+type Ed25519 struct {
+	keys map[string]*keys.PrivateKey
+}
+
+var _ TrustService = &Ed25519{}
+
+func NewEd25519() *Ed25519 {
+	return &Ed25519{
+		make(map[string]*keys.PrivateKey),
+	}
+}
+
+// addKey allows you to add a private key to the trust service
+func (trust *Ed25519) addKey(k *keys.PrivateKey) {
+	key := keys.PrivateKey{
+		PublicKey: keys.PublicKey{
+			Key: data.Key{
+				Type: k.Type,
+				Value: data.KeyValue{
+					Public: make([]byte, len(k.Value.Public)),
+				},
+			},
+			ID: k.ID,
+		},
+		Private: make([]byte, len(k.Private)),
+	}
+
+	copy(key.Value.Public, k.Value.Public)
+	copy(key.Private, k.Private)
+	trust.keys[k.ID] = &key
+}
+
+func (trust *Ed25519) RemoveKey(keyID string) {
+	delete(trust.keys, keyID)
+}
+
+func (trust *Ed25519) Sign(keyIDs []string, toSign []byte) ([]data.Signature, error) {
+	signatures := make([]data.Signature, 0, len(keyIDs))
+	for _, kID := range keyIDs {
+		priv := [ed25519.PrivateKeySize]byte{}
+		pub := [ed25519.PublicKeySize]byte{}
+		copy(priv[:], trust.keys[kID].Private)
+		copy(pub[:], trust.keys[kID].Value.Public)
+		sig := ed25519.Sign(&priv, toSign)
+		signatures = append(signatures, data.Signature{
+			KeyID:     kID,
+			Method:    "ed25519",
+			Signature: sig[:],
+		})
+	}
+	return signatures, nil
+
+}
+
+func (trust *Ed25519) Create() (*keys.PublicKey, error) {
+	pub, priv, err := ed25519.GenerateKey(rand.Reader)
+	if err != nil {
+		return nil, err
+	}
+	pubBytes := make([]byte, ed25519.PublicKeySize)
+	copy(pubBytes, pub[:])
+	privBytes := make([]byte, ed25519.PrivateKeySize)
+	copy(privBytes, priv[:])
+	public := keys.NewPublicKey("ed25519", pubBytes)
+	private := keys.PrivateKey{*public, privBytes}
+	trust.addKey(&private)
+	return public, nil
+}
+
+func (trust *Ed25519) PublicKeys(keyIDs ...string) (map[string]*keys.PublicKey, error) {
+	k := make(map[string]*keys.PublicKey)
+	for _, kID := range keyIDs {
+		if key, ok := trust.keys[kID]; ok {
+			k[kID] = &key.PublicKey
+		}
+	}
+	return k, nil
+}
diff --git a/Godeps/_workspace/src/github.com/endophage/go-tuf/signed/verify.go b/Godeps/_workspace/src/github.com/endophage/go-tuf/signed/verify.go
index 61bce788a3..938c9922c3 100644
--- a/Godeps/_workspace/src/github.com/endophage/go-tuf/signed/verify.go
+++ b/Godeps/_workspace/src/github.com/endophage/go-tuf/signed/verify.go
@@ -6,10 +6,10 @@ import (
 	"strings"
 	"time"
 
-	"github.com/agl/ed25519"
+	"github.com/endophage/go-tuf/Godeps/_workspace/src/github.com/agl/ed25519"
+	"github.com/endophage/go-tuf/Godeps/_workspace/src/github.com/tent/canonical-json-go"
 	"github.com/endophage/go-tuf/data"
 	"github.com/endophage/go-tuf/keys"
-	"github.com/tent/canonical-json-go"
 )
 
 var (
@@ -74,8 +74,8 @@ func VerifySignatures(s *data.Signed, role string, db *keys.DB) error {
 	}
 
 	valid := make(map[string]struct{})
-	var sigBytes [ed25519.SignatureSize]byte
 	for _, sig := range s.Signatures {
+		var sigBytes [ed25519.SignatureSize]byte
 		if sig.Method != "ed25519" {
 			return ErrWrongMethod
 		}
@@ -92,7 +92,9 @@ func VerifySignatures(s *data.Signed, role string, db *keys.DB) error {
 		}
 
 		copy(sigBytes[:], sig.Signature)
-		if !ed25519.Verify(&key.Public, msg, &sigBytes) {
+		var keyBytes [32]byte
+		copy(keyBytes[:], key.Value.Public)
+		if !ed25519.Verify(&keyBytes, msg, &sigBytes) {
 			return ErrInvalid
 		}
 		valid[sig.KeyID] = struct{}{}
diff --git a/Godeps/_workspace/src/github.com/endophage/go-tuf/signed/verify_test.go b/Godeps/_workspace/src/github.com/endophage/go-tuf/signed/verify_test.go
index 468a80680a..08eacc1aee 100644
--- a/Godeps/_workspace/src/github.com/endophage/go-tuf/signed/verify_test.go
+++ b/Godeps/_workspace/src/github.com/endophage/go-tuf/signed/verify_test.go
@@ -4,11 +4,11 @@ import (
 	"testing"
 	"time"
 
-	"github.com/agl/ed25519"
+	"github.com/endophage/go-tuf/Godeps/_workspace/src/github.com/agl/ed25519"
 	"github.com/endophage/go-tuf/data"
 	"github.com/endophage/go-tuf/keys"
 
-	. "gopkg.in/check.v1"
+	. "github.com/endophage/go-tuf/Godeps/_workspace/src/gopkg.in/check.v1"
 )
 
 // Hook up gocheck into the "go test" runner.
diff --git a/Godeps/_workspace/src/github.com/endophage/go-tuf/store/local_store.go.bkp b/Godeps/_workspace/src/github.com/endophage/go-tuf/store/filestore.go
similarity index 82%
rename from Godeps/_workspace/src/github.com/endophage/go-tuf/store/local_store.go.bkp
rename to Godeps/_workspace/src/github.com/endophage/go-tuf/store/filestore.go
index c2a3a02ccf..961f1fc7b1 100644
--- a/Godeps/_workspace/src/github.com/endophage/go-tuf/store/local_store.go.bkp
+++ b/Godeps/_workspace/src/github.com/endophage/go-tuf/store/filestore.go
@@ -1,7 +1,6 @@
 package store
 
 import (
-	"bytes"
 	"encoding/json"
 	"io"
 	"io/ioutil"
@@ -11,75 +10,16 @@ import (
 
 	"github.com/endophage/go-tuf/data"
 	"github.com/endophage/go-tuf/encrypted"
+	"github.com/endophage/go-tuf/errors"
 	"github.com/endophage/go-tuf/util"
 )
 
-func MemoryStore(meta map[string]json.RawMessage, files map[string][]byte) LocalStore {
-	if meta == nil {
-		meta = make(map[string]json.RawMessage)
-	}
-	return &memoryStore{
-		meta:  meta,
-		files: files,
-		keys:  make(map[string][]*data.Key),
-	}
-}
-
-type memoryStore struct {
-	meta  map[string]json.RawMessage
-	files map[string][]byte
-	keys  map[string][]*data.Key
-}
-
-func (m *memoryStore) GetMeta() (map[string]json.RawMessage, error) {
-	return m.meta, nil
-}
-
-func (m *memoryStore) SetMeta(name string, meta json.RawMessage) error {
-	m.meta[name] = meta
-	return nil
-}
-
-func (m *memoryStore) WalkStagedTargets(paths []string, targetsFn targetsWalkFunc) error {
-	if len(paths) == 0 {
-		for path, data := range m.files {
-			if err := targetsFn(path, bytes.NewReader(data)); err != nil {
-				return err
-			}
-		}
-		return nil
-	}
-
-	for _, path := range paths {
-		data, ok := m.files[path]
-		if !ok {
-			return ErrFileNotFound{path}
-		}
-		if err := targetsFn(path, bytes.NewReader(data)); err != nil {
-			return err
-		}
-	}
-	return nil
-}
-
-func (m *memoryStore) Commit(map[string]json.RawMessage, bool, map[string]data.Hashes) error {
-	return nil
-}
-
-func (m *memoryStore) GetKeys(role string) ([]*data.Key, error) {
-	return m.keys[role], nil
-}
-
-func (m *memoryStore) SaveKey(role string, key *data.Key) error {
-	if _, ok := m.keys[role]; !ok {
-		m.keys[role] = make([]*data.Key, 0)
-	}
-	m.keys[role] = append(m.keys[role], key)
-	return nil
-}
-
-func (m *memoryStore) Clean() error {
-	return nil
+// topLevelManifests determines the order signatures are verified when committing.
+var topLevelManifests = []string{
+	"root.json",
+	"targets.json",
+	"snapshot.json",
+	"timestamp.json",
 }
 
 type persistedKeys struct {
@@ -171,7 +111,11 @@ func (f *fileSystemStore) WalkStagedTargets(paths []string, targetsFn targetsWal
 				return err
 			}
 			defer file.Close()
-			return targetsFn(rel, file)
+			meta, err := util.GenerateFileMeta(file, "sha256")
+			if err != nil {
+				return err
+			}
+			return targetsFn(rel, meta)
 		}
 		return filepath.Walk(filepath.Join(f.stagedDir(), "targets"), walkFunc)
 	}
@@ -181,7 +125,7 @@ func (f *fileSystemStore) WalkStagedTargets(paths []string, targetsFn targetsWal
 		realPath := filepath.Join(f.stagedDir(), "targets", path)
 		if _, err := os.Stat(realPath); err != nil {
 			if os.IsNotExist(err) {
-				return ErrFileNotFound{realPath}
+				return errors.ErrFileNotFound{realPath}
 			}
 			return err
 		}
@@ -192,11 +136,15 @@ func (f *fileSystemStore) WalkStagedTargets(paths []string, targetsFn targetsWal
 		file, err := os.Open(realPath)
 		if err != nil {
 			if os.IsNotExist(err) {
-				return ErrFileNotFound{realPath}
+				return errors.ErrFileNotFound{realPath}
 			}
 			return err
 		}
-		err = targetsFn(path, file)
+		meta, err := util.GenerateFileMeta(file, "sha256")
+		if err != nil {
+			return err
+		}
+		err = targetsFn(path, meta)
 		file.Close()
 		if err != nil {
 			return err
@@ -382,7 +330,7 @@ func (f *fileSystemStore) loadKeys(role string) ([]*data.Key, []byte, error) {
 
 	// the keys are encrypted so cannot be loaded if passphraseFunc is not set
 	if f.passphraseFunc == nil {
-		return nil, nil, ErrPassphraseRequired{role}
+		return nil, nil, errors.ErrPassphraseRequired{role}
 	}
 
 	pass, err := f.passphraseFunc(role, false)
diff --git a/Godeps/_workspace/src/github.com/endophage/go-tuf/store/memorystore.go b/Godeps/_workspace/src/github.com/endophage/go-tuf/store/memorystore.go
new file mode 100644
index 0000000000..dfca36ef64
--- /dev/null
+++ b/Godeps/_workspace/src/github.com/endophage/go-tuf/store/memorystore.go
@@ -0,0 +1,86 @@
+package store
+
+import (
+	"bytes"
+	"encoding/json"
+
+	"github.com/endophage/go-tuf/data"
+	"github.com/endophage/go-tuf/errors"
+	"github.com/endophage/go-tuf/util"
+)
+
+func MemoryStore(meta map[string]json.RawMessage, files map[string][]byte) LocalStore {
+	if meta == nil {
+		meta = make(map[string]json.RawMessage)
+	}
+	return &memoryStore{
+		meta:  meta,
+		files: files,
+		keys:  make(map[string][]*data.Key),
+	}
+}
+
+type memoryStore struct {
+	meta  map[string]json.RawMessage
+	files map[string][]byte
+	keys  map[string][]*data.Key
+}
+
+func (m *memoryStore) GetMeta() (map[string]json.RawMessage, error) {
+	return m.meta, nil
+}
+
+func (m *memoryStore) SetMeta(name string, meta json.RawMessage) error {
+	m.meta[name] = meta
+	return nil
+}
+
+func (m *memoryStore) WalkStagedTargets(paths []string, targetsFn targetsWalkFunc) error {
+	if len(paths) == 0 {
+		for path, data := range m.files {
+			meta, err := util.GenerateFileMeta(bytes.NewReader(data), "sha256")
+			if err != nil {
+				return err
+			}
+			if err = targetsFn(path, meta); err != nil {
+				return err
+			}
+		}
+		return nil
+	}
+
+	for _, path := range paths {
+		data, ok := m.files[path]
+		if !ok {
+			return errors.ErrFileNotFound{path}
+		}
+		meta, err := util.GenerateFileMeta(bytes.NewReader(data), "sha256")
+		if err != nil {
+			return err
+		}
+		if err = targetsFn(path, meta); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func (m *memoryStore) Commit(map[string]json.RawMessage, bool, map[string]data.Hashes) error {
+	return nil
+}
+
+func (m *memoryStore) GetKeys(role string) ([]*data.Key, error) {
+	return m.keys[role], nil
+}
+
+func (m *memoryStore) SaveKey(role string, key *data.Key) error {
+	if _, ok := m.keys[role]; !ok {
+		m.keys[role] = make([]*data.Key, 0)
+	}
+	m.keys[role] = append(m.keys[role], key)
+	return nil
+}
+
+func (m *memoryStore) Clean() error {
+	return nil
+}
diff --git a/Godeps/_workspace/src/github.com/endophage/go-tuf/util/util_test.go b/Godeps/_workspace/src/github.com/endophage/go-tuf/util/util_test.go
index 8a7a3ac14e..90fbaf0633 100644
--- a/Godeps/_workspace/src/github.com/endophage/go-tuf/util/util_test.go
+++ b/Godeps/_workspace/src/github.com/endophage/go-tuf/util/util_test.go
@@ -5,8 +5,8 @@ import (
 	"encoding/hex"
 	"testing"
 
+	. "github.com/endophage/go-tuf/Godeps/_workspace/src/gopkg.in/check.v1"
 	"github.com/endophage/go-tuf/data"
-	. "gopkg.in/check.v1"
 )
 
 // Hook up gocheck into the "go test" runner.