deprecate use of github.com/satori/go.uuid for github.com/gofrs/uuid

Gopkg.toml version of go.uuid@1.2.0 did not include non-random uuid fix:
satori/go.uuid#73

also, deprecation notice for satori/go.uuid posted via issue:
satori/go.uuid#84

community recommended replacement is available at github.com/gofrs/uuid

* updated Gopkg.toml to use github.com/gofrs/uuid @ 3.1.2
* rebuilt Gopkg.lock
* incorporate symmantics of uuid.NewV4() can return error

Signed-off-by: David Gervais <dgervais@gmail.com>

Gopkg.toml

@@ -25,7 +25,7 @@
 #   unused-packages = true
 
 required = ["github.com/hashicorp/go-plugin",
-  "github.com/satori/go.uuid",
+  "github.com/gofrs/uuid",
   "github.com/golang/protobuf/protoc-gen-go",
   "github.com/grpc-ecosystem/grpc-gateway/protoc-gen-grpc-gateway",
   "github.com/grpc-ecosystem/grpc-gateway/protoc-gen-swagger",
@@ -88,8 +88,8 @@ required = ["github.com/hashicorp/go-plugin",
   version = "1.0.0"
 
 [[constraint]]
-  name = "github.com/satori/go.uuid"
-  version = "1.2.0"
+  name = "github.com/gofrs/uuid"
+  version = "3.1.2"
 
 [[constraint]]
   name = "github.com/shirou/gopsutil"

pkg/agent/manager/cache/subscriber.go

@@ -3,7 +3,7 @@ package cache
 import (
 	"sync"
 
-	"github.com/satori/go.uuid"
+	"github.com/gofrs/uuid"
 	"github.com/spiffe/spire/pkg/common/selector"
 )
 
@@ -33,10 +33,14 @@ type subscribers struct {
 }
 
 func NewSubscriber(selectors Selectors) (*subscriber, error) {
+	u, err := uuid.NewV4()
+	if err != nil {
+		return nil, err
+	}
 	return &subscriber{
 		c:      make(chan *WorkloadUpdate, 1),
 		sel:    selectors,
-		sid:    uuid.NewV4(),
+		sid:    u,
 		active: true,
 	}, nil
 }

pkg/agent/plugin/nodeattestor/k8s/sat.go

@@ -6,8 +6,8 @@ import (
 	"io/ioutil"
 	"sync"
 
+	"github.com/gofrs/uuid"
 	"github.com/hashicorp/hcl"
-	uuid "github.com/satori/go.uuid"
 	"github.com/spiffe/spire/pkg/common/plugin/k8s"
 	"github.com/spiffe/spire/proto/agent/nodeattestor"
 	"github.com/spiffe/spire/proto/common"
@@ -41,16 +41,20 @@ type SATAttestorPlugin struct {
 	config *satAttestorConfig
 
 	hooks struct {
-		newUUID func() string
+		newUUID func() (string, error)
 	}
 }
 
 var _ nodeattestor.Plugin = (*SATAttestorPlugin)(nil)
 
 func NewSATAttestorPlugin() *SATAttestorPlugin {
 	p := &SATAttestorPlugin{}
-	p.hooks.newUUID = func() string {
-		return uuid.NewV4().String()
+	p.hooks.newUUID = func() (string, error) {
+		u, err := uuid.NewV4()
+		if err != nil {
+			return "", err
+		}
+		return u.String(), nil
 	}
 	return p
 }
@@ -61,7 +65,10 @@ func (p *SATAttestorPlugin) FetchAttestationData(stream nodeattestor.FetchAttest
 		return err
 	}
 
-	uuid := p.hooks.newUUID()
+	uuid, err := p.hooks.newUUID()
+	if err != nil {
+		return err
+	}
 
 	token, err := loadTokenFromFile(config.tokenPath)
 	if err != nil {

pkg/agent/plugin/nodeattestor/k8s/sat_test.go

@@ -116,8 +116,8 @@ func (s *SATAttestorSuite) TestGetPluginInfo() {
 
 func (s *SATAttestorSuite) newAttestor() {
 	attestor := NewSATAttestorPlugin()
-	attestor.hooks.newUUID = func() string {
-		return "UUID"
+	attestor.hooks.newUUID = func() (string, error) {
+		return "UUID", nil
 	}
 	s.attestor = nodeattestor.NewBuiltIn(attestor)
 }

pkg/server/endpoints/registration/handler.go

@@ -6,9 +6,9 @@ import (
 	"net/url"
 	"time"
 
+	"github.com/gofrs/uuid"
 	"github.com/golang/protobuf/proto"
 	"github.com/golang/protobuf/ptypes/wrappers"
-	"github.com/satori/go.uuid"
 	"github.com/sirupsen/logrus"
 	"github.com/spiffe/spire/pkg/common/bundleutil"
 	"github.com/spiffe/spire/pkg/common/idutil"
@@ -425,7 +425,11 @@ func (h *Handler) CreateJoinToken(
 
 	// Generate a token if one wasn't specified
 	if request.Token == "" {
-		request.Token = uuid.NewV4().String()
+		u, err := uuid.NewV4()
+		if err != nil {
+			return nil, errors.New("Error generating uuid token: %v")
+		}
+		request.Token = u.String()
 	}
 
 	ds := h.getDataStore()

pkg/server/plugin/datastore/sql/sql.go

@@ -10,11 +10,11 @@ import (
 	"sync"
 	"time"
 
+	"github.com/gofrs/uuid"
 	"github.com/golang/protobuf/proto"
 	"github.com/hashicorp/hcl"
 	"github.com/jinzhu/gorm"
 	_ "github.com/jinzhu/gorm/dialects/sqlite"
-	uuid "github.com/satori/go.uuid"
 	"github.com/spiffe/spire/pkg/common/bundleutil"
 	"github.com/spiffe/spire/pkg/common/idutil"
 	"github.com/spiffe/spire/pkg/common/selector"
@@ -772,7 +772,10 @@ func createRegistrationEntry(tx *gorm.DB,
 		return nil, err
 	}
 
-	entryID := newRegistrationEntryID()
+	entryID, err := newRegistrationEntryID()
+	if err != nil {
+		return nil, err
+	}
 
 	newRegisteredEntry := RegisteredEntry{
 		EntryID:  entryID,
@@ -1235,8 +1238,12 @@ func modelToEntry(tx *gorm.DB, model RegisteredEntry) (*common.RegistrationEntry
 	}, nil
 }
 
-func newRegistrationEntryID() string {
-	return uuid.NewV4().String()
+func newRegistrationEntryID() (string, error) {
+	u, err := uuid.NewV4()
+	if err != nil {
+		return "", err
+	}
+	return u.String(), nil
 }
 
 func modelToAttestedNode(model AttestedNode) *datastore.AttestedNode {

test/fakes/fakedatastore/fakedatastore.go

@@ -7,9 +7,9 @@ import (
 	"sort"
 	"sync"
 
+	"github.com/gofrs/uuid"
 	"github.com/golang/protobuf/proto"
 	_ "github.com/jinzhu/gorm/dialects/sqlite"
-	uuid "github.com/satori/go.uuid"
 	"github.com/spiffe/spire/pkg/common/bundleutil"
 	"github.com/spiffe/spire/pkg/common/selector"
 	"github.com/spiffe/spire/pkg/common/util"
@@ -310,7 +310,10 @@ func (s *DataStore) CreateRegistrationEntry(ctx context.Context,
 	s.mu.Lock()
 	defer s.mu.Unlock()
 
-	entryID := newRegistrationEntryID()
+	entryID, err := newRegistrationEntryID()
+	if err != nil {
+		return nil, err
+	}
 
 	entry := cloneRegistrationEntry(req.Entry)
 	entry.EntryId = entryID
@@ -603,8 +606,12 @@ func cloneJoinToken(token *datastore.JoinToken) *datastore.JoinToken {
 	return proto.Clone(token).(*datastore.JoinToken)
 }
 
-func newRegistrationEntryID() string {
-	return uuid.NewV4().String()
+func newRegistrationEntryID() (string, error) {
+	u, err := uuid.NewV4()
+	if err != nil {
+		return "", err
+	}
+	return u.String(), nil
 }
 
 func containsSelectors(selectors, subset []*common.Selector) bool {