storage/static.go: storage backend should not explicitly lower-case email ids.

cmd/dex/serve.go

@@ -144,7 +144,7 @@ func serve(cmd *cobra.Command, args []string) error {
 		for i, p := range c.StaticPasswords {
 			passwords[i] = storage.Password(p)
 		}
-		s = storage.WithStaticPasswords(s, passwords)
+		s = storage.WithStaticPasswords(s, passwords, logger)
 	}
 
 	storageConnectors := make([]storage.Connector, len(c.StaticConnectors))

storage/memory/memory.go

@@ -128,12 +128,12 @@ func (s *memStorage) CreateAuthRequest(a storage.AuthRequest) (err error) {
 }
 
 func (s *memStorage) CreatePassword(p storage.Password) (err error) {
-	p.Email = strings.ToLower(p.Email)
+	lowerEmail := strings.ToLower(p.Email)
 	s.tx(func() {
-		if _, ok := s.passwords[p.Email]; ok {
+		if _, ok := s.passwords[lowerEmail]; ok {
 			err = storage.ErrAlreadyExists
 		} else {
-			s.passwords[p.Email] = p
+			s.passwords[lowerEmail] = p
 		}
 	})
 	return

storage/memory/static_test.go

@@ -108,9 +108,10 @@ func TestStaticPasswords(t *testing.T) {
 	p1 := storage.Password{Email: "foo@example.com", Username: "foo_secret"}
 	p2 := storage.Password{Email: "bar@example.com", Username: "bar_secret"}
 	p3 := storage.Password{Email: "spam@example.com", Username: "spam_secret"}
+	p4 := storage.Password{Email: "Spam@example.com", Username: "Spam_secret"}
 
 	backing.CreatePassword(p1)
-	s := storage.WithStaticPasswords(backing, []storage.Password{p2})
+	s := storage.WithStaticPasswords(backing, []storage.Password{p2}, logger)
 
 	tests := []struct {
 		name    string
@@ -159,6 +160,29 @@ func TestStaticPasswords(t *testing.T) {
 				return s.UpdatePassword(p1.Email, updater)
 			},
 		},
+		{
+			name: "create passwords",
+			action: func() error {
+				if err := s.CreatePassword(p4); err != nil {
+					return err
+				}
+				return s.CreatePassword(p3)
+			},
+			wantErr: true,
+		},
+		{
+			name: "get password",
+			action: func() error {
+				p, err := s.GetPassword(p4.Email)
+				if err != nil {
+					return err
+				}
+				if strings.Compare(p.Email, p4.Email) != 0 {
+					return fmt.Errorf("expected %s passwords got %s", p4.Email, p.Email)
+				}
+				return nil
+			},
+		},
 		{
 			name: "list passwords",
 			action: func() error {
@@ -166,18 +190,12 @@ func TestStaticPasswords(t *testing.T) {
 				if err != nil {
 					return err
 				}
-				if n := len(passwords); n != 2 {
-					return fmt.Errorf("expected 2 passwords got %d", n)
+				if n := len(passwords); n != 3 {
+					return fmt.Errorf("expected 3 passwords got %d", n)
 				}
 				return nil
 			},
 		},
-		{
-			name: "create password",
-			action: func() error {
-				return s.CreatePassword(p3)
-			},
-		},
 	}
 
 	for _, tc := range tests {

storage/static.go

@@ -3,6 +3,8 @@ package storage
 import (
 	"errors"
 	"strings"
+
+	"github.com/sirupsen/logrus"
 )
 
 // Tests for this code are in the "memory" package, since this package doesn't
@@ -25,6 +27,7 @@ func WithStaticClients(s Storage, staticClients []Client) Storage {
 	for _, client := range staticClients {
 		clientsByID[client.ID] = client
 	}
+
 	return staticClientsStorage{s, staticClients, clientsByID}
 }
 
@@ -82,19 +85,26 @@ type staticPasswordsStorage struct {
 	Storage
 
 	// A read-only set of passwords.
-	passwords        []Password
+	passwords []Password
+	// A map of passwords that is indexed by lower-case email ids
 	passwordsByEmail map[string]Password
+
+	logger logrus.FieldLogger
 }
 
-// WithStaticPasswords returns a storage with a read-only set of passwords. Write actions,
-// such as creating other passwords, will fail.
-func WithStaticPasswords(s Storage, staticPasswords []Password) Storage {
+// WithStaticPasswords returns a storage with a read-only set of passwords.
+func WithStaticPasswords(s Storage, staticPasswords []Password, logger logrus.FieldLogger) Storage {
 	passwordsByEmail := make(map[string]Password, len(staticPasswords))
 	for _, p := range staticPasswords {
-		p.Email = strings.ToLower(p.Email)
-		passwordsByEmail[p.Email] = p
+		//Enable case insensitive email comparison.
+		lowerEmail := strings.ToLower(p.Email)
+		if _, ok := passwordsByEmail[lowerEmail]; ok {
+			logger.Errorf("Attempting to create StaticPasswords with the same email id: %s", p.Email)
+		}
+		passwordsByEmail[lowerEmail] = p
 	}
-	return staticPasswordsStorage{s, staticPasswords, passwordsByEmail}
+
+	return staticPasswordsStorage{s, staticPasswords, passwordsByEmail, logger}
 }
 
 func (s staticPasswordsStorage) isStatic(email string) bool {