diff --git a/api/v2/descriptors.go b/api/v2/descriptors.go
index a0569840..e98ed4ad 100644
--- a/api/v2/descriptors.go
+++ b/api/v2/descriptors.go
@@ -4,7 +4,6 @@ import (
 	"net/http"
 	"regexp"
 
-	"github.com/docker/distribution/common"
 	"github.com/docker/distribution/digest"
 )
 
@@ -12,7 +11,7 @@ var (
 	nameParameterDescriptor = ParameterDescriptor{
 		Name:        "name",
 		Type:        "string",
-		Format:      common.RepositoryNameRegexp.String(),
+		Format:      RepositoryNameRegexp.String(),
 		Required:    true,
 		Description: `Name of the target repository.`,
 	}
@@ -20,7 +19,7 @@ var (
 	tagParameterDescriptor = ParameterDescriptor{
 		Name:        "tag",
 		Type:        "string",
-		Format:      common.TagNameRegexp.String(),
+		Format:      TagNameRegexp.String(),
 		Required:    true,
 		Description: `Tag of the target manifiest.`,
 	}
@@ -377,7 +376,7 @@ var routeDescriptors = []RouteDescriptor{
 	},
 	{
 		Name:        RouteNameTags,
-		Path:        "/v2/{name:" + common.RepositoryNameRegexp.String() + "}/tags/list",
+		Path:        "/v2/{name:" + RepositoryNameRegexp.String() + "}/tags/list",
 		Entity:      "Tags",
 		Description: "Retrieve information about tags.",
 		Methods: []MethodDescriptor{
@@ -448,7 +447,7 @@ var routeDescriptors = []RouteDescriptor{
 	},
 	{
 		Name:        RouteNameManifest,
-		Path:        "/v2/{name:" + common.RepositoryNameRegexp.String() + "}/manifests/{tag:" + common.TagNameRegexp.String() + "}",
+		Path:        "/v2/{name:" + RepositoryNameRegexp.String() + "}/manifests/{tag:" + TagNameRegexp.String() + "}",
 		Entity:      "Manifest",
 		Description: "Create, update and retrieve manifests.",
 		Methods: []MethodDescriptor{
@@ -693,7 +692,7 @@ var routeDescriptors = []RouteDescriptor{
 
 	{
 		Name:        RouteNameBlob,
-		Path:        "/v2/{name:" + common.RepositoryNameRegexp.String() + "}/blobs/{digest:" + digest.DigestRegexp.String() + "}",
+		Path:        "/v2/{name:" + RepositoryNameRegexp.String() + "}/blobs/{digest:" + digest.DigestRegexp.String() + "}",
 		Entity:      "Blob",
 		Description: "Fetch the blob identified by `name` and `digest`. Used to fetch layers by tarsum digest.",
 		Methods: []MethodDescriptor{
@@ -852,7 +851,7 @@ var routeDescriptors = []RouteDescriptor{
 
 	{
 		Name:        RouteNameBlobUpload,
-		Path:        "/v2/{name:" + common.RepositoryNameRegexp.String() + "}/blobs/uploads/",
+		Path:        "/v2/{name:" + RepositoryNameRegexp.String() + "}/blobs/uploads/",
 		Entity:      "Intiate Blob Upload",
 		Description: "Initiate a blob upload. This endpoint can be used to create resumable uploads or monolithic uploads.",
 		Methods: []MethodDescriptor{
@@ -964,7 +963,7 @@ var routeDescriptors = []RouteDescriptor{
 
 	{
 		Name:        RouteNameBlobUploadChunk,
-		Path:        "/v2/{name:" + common.RepositoryNameRegexp.String() + "}/blobs/uploads/{uuid}",
+		Path:        "/v2/{name:" + RepositoryNameRegexp.String() + "}/blobs/uploads/{uuid}",
 		Entity:      "Blob Upload",
 		Description: "Interact with blob uploads. Clients should never assemble URLs for this endpoint and should only take it through the `Location` header on related API requests. The `Location` header and its parameters should be preserved by clients, using the latest value returned via upload related API calls.",
 		Methods: []MethodDescriptor{
diff --git a/common/names.go b/api/v2/names.go
similarity index 99%
rename from common/names.go
rename to api/v2/names.go
index 0172c480..e0c05d48 100644
--- a/common/names.go
+++ b/api/v2/names.go
@@ -1,4 +1,4 @@
-package common
+package v2
 
 import (
 	"fmt"
diff --git a/common/names_test.go b/api/v2/names_test.go
similarity index 99%
rename from common/names_test.go
rename to api/v2/names_test.go
index e88257bd..038386e4 100644
--- a/common/names_test.go
+++ b/api/v2/names_test.go
@@ -1,4 +1,4 @@
-package common
+package v2
 
 import (
 	"testing"
diff --git a/api_test.go b/api_test.go
index acd9e257..b0f3bb2b 100644
--- a/api_test.go
+++ b/api_test.go
@@ -14,11 +14,11 @@ import (
 	"testing"
 
 	"github.com/docker/distribution/api/v2"
-	"github.com/docker/distribution/common/testutil"
 	"github.com/docker/distribution/configuration"
 	"github.com/docker/distribution/digest"
 	"github.com/docker/distribution/manifest"
 	_ "github.com/docker/distribution/storagedriver/inmemory"
+	"github.com/docker/distribution/testutil"
 	"github.com/docker/libtrust"
 	"github.com/gorilla/handlers"
 )
diff --git a/auth/token/accesscontroller.go b/auth/token/accesscontroller.go
index ca92861e..4bbbc3e0 100644
--- a/auth/token/accesscontroller.go
+++ b/auth/token/accesscontroller.go
@@ -14,7 +14,6 @@ import (
 	"github.com/docker/libtrust"
 
 	"github.com/docker/distribution/auth"
-	"github.com/docker/distribution/common"
 )
 
 // accessSet maps a typed, named resource to
@@ -38,7 +37,7 @@ func newAccessSet(accessItems ...auth.Access) accessSet {
 			accessSet[resource] = set
 		}
 
-		set.Add(access.Action)
+		set.add(access.Action)
 	}
 
 	return accessSet
@@ -48,7 +47,7 @@ func newAccessSet(accessItems ...auth.Access) accessSet {
 func (s accessSet) contains(access auth.Access) bool {
 	actionSet, ok := s[access.Resource]
 	if ok {
-		return actionSet.Contains(access.Action)
+		return actionSet.contains(access.Action)
 	}
 
 	return false
@@ -61,7 +60,7 @@ func (s accessSet) scopeParam() string {
 	scopes := make([]string, 0, len(s))
 
 	for resource, actionSet := range s {
-		actions := strings.Join(actionSet.Keys(), ",")
+		actions := strings.Join(actionSet.keys(), ",")
 		scopes = append(scopes, fmt.Sprintf("%s:%s:%s", resource.Type, resource.Name, actions))
 	}
 
@@ -241,8 +240,8 @@ func (ac *accessController) Authorized(req *http.Request, accessItems ...auth.Ac
 	}
 
 	verifyOpts := VerifyOptions{
-		TrustedIssuers:    common.NewStringSet(ac.issuer),
-		AcceptedAudiences: common.NewStringSet(ac.service),
+		TrustedIssuers:    []string{ac.issuer},
+		AcceptedAudiences: []string{ac.service},
 		Roots:             ac.rootCerts,
 		TrustedKeys:       ac.trustedKeys,
 	}
diff --git a/common/stringset.go b/auth/token/stringset.go
similarity index 64%
rename from common/stringset.go
rename to auth/token/stringset.go
index 36f4ba5a..1d04f104 100644
--- a/common/stringset.go
+++ b/auth/token/stringset.go
@@ -1,30 +1,30 @@
-package common
+package token
 
 // StringSet is a useful type for looking up strings.
-type StringSet map[string]struct{}
+type stringSet map[string]struct{}
 
 // NewStringSet creates a new StringSet with the given strings.
-func NewStringSet(keys ...string) StringSet {
-	ss := make(StringSet, len(keys))
-	ss.Add(keys...)
+func newStringSet(keys ...string) stringSet {
+	ss := make(stringSet, len(keys))
+	ss.add(keys...)
 	return ss
 }
 
 // Add inserts the given keys into this StringSet.
-func (ss StringSet) Add(keys ...string) {
+func (ss stringSet) add(keys ...string) {
 	for _, key := range keys {
 		ss[key] = struct{}{}
 	}
 }
 
 // Contains returns whether the given key is in this StringSet.
-func (ss StringSet) Contains(key string) bool {
+func (ss stringSet) contains(key string) bool {
 	_, ok := ss[key]
 	return ok
 }
 
 // Keys returns a slice of all keys in this StringSet.
-func (ss StringSet) Keys() []string {
+func (ss stringSet) keys() []string {
 	keys := make([]string, 0, len(ss))
 
 	for key := range ss {
diff --git a/auth/token/token.go b/auth/token/token.go
index cdbf7107..49449f3b 100644
--- a/auth/token/token.go
+++ b/auth/token/token.go
@@ -14,7 +14,6 @@ import (
 	"github.com/docker/libtrust"
 
 	"github.com/docker/distribution/auth"
-	"github.com/docker/distribution/common"
 )
 
 const (
@@ -71,8 +70,8 @@ type Token struct {
 // VerifyOptions is used to specify
 // options when verifying a JSON Web Token.
 type VerifyOptions struct {
-	TrustedIssuers    common.StringSet
-	AcceptedAudiences common.StringSet
+	TrustedIssuers    []string
+	AcceptedAudiences []string
 	Roots             *x509.CertPool
 	TrustedKeys       map[string]libtrust.PublicKey
 }
@@ -132,13 +131,13 @@ func NewToken(rawToken string) (*Token, error) {
 // Returns a nil error if the token is valid.
 func (t *Token) Verify(verifyOpts VerifyOptions) error {
 	// Verify that the Issuer claim is a trusted authority.
-	if !verifyOpts.TrustedIssuers.Contains(t.Claims.Issuer) {
+	if !contains(verifyOpts.TrustedIssuers, t.Claims.Issuer) {
 		log.Errorf("token from untrusted issuer: %q", t.Claims.Issuer)
 		return ErrInvalidToken
 	}
 
 	// Verify that the Audience claim is allowed.
-	if !verifyOpts.AcceptedAudiences.Contains(t.Claims.Audience) {
+	if !contains(verifyOpts.AcceptedAudiences, t.Claims.Audience) {
 		log.Errorf("token intended for another audience: %q", t.Claims.Audience)
 		return ErrInvalidToken
 	}
@@ -332,7 +331,7 @@ func (t *Token) accessSet() accessSet {
 		}
 
 		for _, action := range resourceActions.Actions {
-			set.Add(action)
+			set.add(action)
 		}
 	}
 
diff --git a/auth/token/token_test.go b/auth/token/token_test.go
index 9c8ab6cb..ba81900b 100644
--- a/auth/token/token_test.go
+++ b/auth/token/token_test.go
@@ -15,10 +15,8 @@ import (
 	"testing"
 	"time"
 
-	"github.com/docker/libtrust"
-
 	"github.com/docker/distribution/auth"
-	"github.com/docker/distribution/common"
+	"github.com/docker/libtrust"
 )
 
 func makeRootKeys(numKeys int) ([]libtrust.PrivateKey, error) {
@@ -196,8 +194,8 @@ func TestTokenVerify(t *testing.T) {
 	}
 
 	verifyOps := VerifyOptions{
-		TrustedIssuers:    common.NewStringSet(issuer),
-		AcceptedAudiences: common.NewStringSet(audience),
+		TrustedIssuers:    []string{issuer},
+		AcceptedAudiences: []string{audience},
 		Roots:             rootPool,
 		TrustedKeys:       trustedKeys,
 	}
diff --git a/auth/token/util.go b/auth/token/util.go
index 8aa46bac..bf3e01e8 100644
--- a/auth/token/util.go
+++ b/auth/token/util.go
@@ -4,8 +4,6 @@ import (
 	"encoding/base64"
 	"errors"
 	"strings"
-
-	"github.com/docker/distribution/common"
 )
 
 // joseBase64UrlEncode encodes the given data using the standard base64 url
@@ -35,15 +33,26 @@ func joseBase64UrlDecode(s string) ([]byte, error) {
 
 // actionSet is a special type of stringSet.
 type actionSet struct {
-	common.StringSet
+	stringSet
 }
 
 func newActionSet(actions ...string) actionSet {
-	return actionSet{common.NewStringSet(actions...)}
+	return actionSet{newStringSet(actions...)}
 }
 
 // Contains calls StringSet.Contains() for
 // either "*" or the given action string.
-func (s actionSet) Contains(action string) bool {
-	return s.StringSet.Contains("*") || s.StringSet.Contains(action)
+func (s actionSet) contains(action string) bool {
+	return s.stringSet.contains("*") || s.stringSet.contains(action)
+}
+
+// contains returns true if q is found in ss.
+func contains(ss []string, q string) bool {
+	for _, s := range ss {
+		if s == q {
+			return true
+		}
+	}
+
+	return false
 }
diff --git a/client/client_test.go b/client/client_test.go
index 76867bcf..65e73f34 100644
--- a/client/client_test.go
+++ b/client/client_test.go
@@ -9,9 +9,9 @@ import (
 	"sync"
 	"testing"
 
-	"github.com/docker/distribution/common/testutil"
 	"github.com/docker/distribution/digest"
 	"github.com/docker/distribution/manifest"
+	"github.com/docker/distribution/testutil"
 )
 
 type testBlob struct {
diff --git a/digest/digest.go b/digest/digest.go
index dcf6bc91..a5d5b5a8 100644
--- a/digest/digest.go
+++ b/digest/digest.go
@@ -10,7 +10,6 @@ import (
 	"regexp"
 	"strings"
 
-	"github.com/docker/distribution/common"
 	"github.com/docker/docker/pkg/tarsum"
 )
 
@@ -105,7 +104,7 @@ func FromBytes(p []byte) (Digest, error) {
 func (d Digest) Validate() error {
 	s := string(d)
 	// Common case will be tarsum
-	_, err := common.ParseTarSum(s)
+	_, err := ParseTarSum(s)
 	if err == nil {
 		return nil
 	}
diff --git a/common/tarsum.go b/digest/tarsum.go
similarity index 99%
rename from common/tarsum.go
rename to digest/tarsum.go
index a1a56d6d..6c32bc59 100644
--- a/common/tarsum.go
+++ b/digest/tarsum.go
@@ -1,4 +1,4 @@
-package common
+package digest
 
 import (
 	"fmt"
diff --git a/common/tarsum_test.go b/digest/tarsum_test.go
similarity index 99%
rename from common/tarsum_test.go
rename to digest/tarsum_test.go
index e860c9cd..5a10b746 100644
--- a/common/tarsum_test.go
+++ b/digest/tarsum_test.go
@@ -1,4 +1,4 @@
-package common
+package digest
 
 import (
 	"reflect"
diff --git a/digest/verifiers_test.go b/digest/verifiers_test.go
index 5d595ec1..939a8c81 100644
--- a/digest/verifiers_test.go
+++ b/digest/verifiers_test.go
@@ -7,7 +7,7 @@ import (
 	"os"
 	"testing"
 
-	"github.com/docker/distribution/common/testutil"
+	"github.com/docker/distribution/testutil"
 )
 
 func TestDigestVerifier(t *testing.T) {
diff --git a/storage/layer_test.go b/storage/layer_test.go
index be5ac57d..ec5b7406 100644
--- a/storage/layer_test.go
+++ b/storage/layer_test.go
@@ -9,10 +9,10 @@ import (
 	"os"
 	"testing"
 
-	"github.com/docker/distribution/common/testutil"
 	"github.com/docker/distribution/digest"
 	"github.com/docker/distribution/storagedriver"
 	"github.com/docker/distribution/storagedriver/inmemory"
+	"github.com/docker/distribution/testutil"
 )
 
 // TestSimpleLayerUpload covers the layer upload process, exercising common
diff --git a/storage/paths.go b/storage/paths.go
index 9a61e081..a19f2d70 100644
--- a/storage/paths.go
+++ b/storage/paths.go
@@ -5,7 +5,6 @@ import (
 	"path"
 	"strings"
 
-	"github.com/docker/distribution/common"
 	"github.com/docker/distribution/digest"
 )
 
@@ -189,7 +188,7 @@ func digestPathComoponents(dgst digest.Digest) ([]string, error) {
 		hex,
 	}
 
-	if tsi, err := common.ParseTarSum(dgst.String()); err == nil {
+	if tsi, err := digest.ParseTarSum(dgst.String()); err == nil {
 		// We have a tarsum!
 		version := tsi.Version
 		if version == "" {
diff --git a/common/testutil/handler.go b/testutil/handler.go
similarity index 100%
rename from common/testutil/handler.go
rename to testutil/handler.go
diff --git a/common/testutil/tarfile.go b/testutil/tarfile.go
similarity index 100%
rename from common/testutil/tarfile.go
rename to testutil/tarfile.go