Merge pull request #105 from yifan-gu/tests

refresh: bcrypt raw bytes rather than base64 encoded string.

db/migrations/0005_refresh_token_create.sql

 -- +migrate Up
 CREATE TABLE refresh_token (
     id bigint NOT NULL,
-    payload_hash text,
+    payload_hash bytea,
     user_id text,
     client_id text
 );

db/refresh.go

 package db
 
 import (
+	"encoding/base64"
 	"errors"
 	"fmt"
 	"strconv"
@@ -31,7 +32,7 @@ type refreshTokenRepo struct {
 
 type refreshTokenModel struct {
 	ID          int64  `db:"id"`
-	PayloadHash string `db:"payload_hash"`
+	PayloadHash []byte `db:"payload_hash"`
 	// TODO(yifan): Use some sort of foreign key to manage database level
 	// data integrity.
 	UserID   string `db:"user_id"`
@@ -39,25 +40,29 @@ type refreshTokenModel struct {
 }
 
 // buildToken combines the token ID and token payload to create a new token.
-func buildToken(tokenID int64, tokenPayload string) string {
-	return fmt.Sprintf("%d%s%s", tokenID, refresh.TokenDelimer, tokenPayload)
+func buildToken(tokenID int64, tokenPayload []byte) string {
+	return fmt.Sprintf("%d%s%s", tokenID, refresh.TokenDelimer, base64.URLEncoding.EncodeToString(tokenPayload))
 }
 
 // parseToken parses a token and returns the token ID and token payload.
-func parseToken(token string) (int64, string, error) {
+func parseToken(token string) (int64, []byte, error) {
 	parts := strings.SplitN(token, refresh.TokenDelimer, 2)
 	if len(parts) != 2 {
-		return -1, "", refresh.ErrorInvalidToken
+		return -1, nil, refresh.ErrorInvalidToken
 	}
 	id, err := strconv.ParseInt(parts[0], 0, 64)
 	if err != nil {
-		return -1, "", refresh.ErrorInvalidToken
+		return -1, nil, refresh.ErrorInvalidToken
 	}
-	return id, parts[1], nil
+	tokenPayload, err := base64.URLEncoding.DecodeString(parts[1])
+	if err != nil {
+		return -1, nil, refresh.ErrorInvalidToken
+	}
+	return id, tokenPayload, nil
 }
 
-func checkTokenPayload(payloadHash, payload string) error {
-	if err := bcrypt.CompareHashAndPassword([]byte(payloadHash), []byte(payload)); err != nil {
+func checkTokenPayload(payloadHash, payload []byte) error {
+	if err := bcrypt.CompareHashAndPassword(payloadHash, payload); err != nil {
 		switch err {
 		case bcrypt.ErrMismatchedHashAndPassword:
 			return refresh.ErrorInvalidToken
@@ -89,13 +94,13 @@ func (r *refreshTokenRepo) Create(userID, clientID string) (string, error) {
 		return "", err
 	}
 
-	payloadHash, err := bcrypt.GenerateFromPassword([]byte(tokenPayload), bcrypt.DefaultCost)
+	payloadHash, err := bcrypt.GenerateFromPassword(tokenPayload, bcrypt.DefaultCost)
 	if err != nil {
 		return "", err
 	}
 
 	record := &refreshTokenModel{
-		PayloadHash: string(payloadHash),
+		PayloadHash: payloadHash,
 		UserID:      userID,
 		ClientID:    clientID,
 	}
@@ -109,6 +114,7 @@ func (r *refreshTokenRepo) Create(userID, clientID string) (string, error) {
 
 func (r *refreshTokenRepo) Verify(clientID, token string) (string, error) {
 	tokenID, tokenPayload, err := parseToken(token)
+
 	if err != nil {
 		return "", err
 	}

functional/db_test.go

 package functional
 
 import (
+	"encoding/base64"
 	"fmt"
 	"net/url"
 	"os"
@@ -342,6 +343,12 @@ func TestDBClientIdentityAll(t *testing.T) {
 	}
 }
 
+// buildRefreshToken combines the token ID and token payload to create a new token.
+// used in the tests to created a refresh token.
+func buildRefreshToken(tokenID int64, tokenPayload []byte) string {
+	return fmt.Sprintf("%d%s%s", tokenID, refresh.TokenDelimer, base64.URLEncoding.EncodeToString(tokenPayload))
+}
+
 func TestDBRefreshRepoCreate(t *testing.T) {
 	r := db.NewRefreshTokenRepo(connect(t))
 
@@ -383,6 +390,13 @@ func TestDBRefreshRepoVerify(t *testing.T) {
 		t.Fatalf("Unexpected error: %v", err)
 	}
 
+	badTokenPayload, err := refresh.DefaultRefreshTokenGenerator()
+	if err != nil {
+		t.Fatalf("Unexpected error: %v", err)
+	}
+	tokenWithBadID := "404" + token[1:]
+	tokenWithBadPayload := buildRefreshToken(1, badTokenPayload)
+
 	tests := []struct {
 		token    string
 		creds    oidc.ClientCredentials
@@ -390,7 +404,39 @@ func TestDBRefreshRepoVerify(t *testing.T) {
 		expected string
 	}{
 		{
-			"invalid-token-foo",
+			"invalid-token-format",
+			oidc.ClientCredentials{ID: "client-foo", Secret: "secret-foo"},
+			refresh.ErrorInvalidToken,
+			"",
+		},
+		{
+			"b/invalid-base64-encoded-format",
+			oidc.ClientCredentials{ID: "client-foo", Secret: "secret-foo"},
+			refresh.ErrorInvalidToken,
+			"",
+		},
+		{
+			"1/invalid-base64-encoded-format",
+			oidc.ClientCredentials{ID: "client-foo", Secret: "secret-foo"},
+			refresh.ErrorInvalidToken,
+			"",
+		},
+		{
+			token + "corrupted-token-payload",
+			oidc.ClientCredentials{ID: "client-foo", Secret: "secret-foo"},
+			refresh.ErrorInvalidToken,
+			"",
+		},
+		{
+			// The token's ID content is invalid.
+			tokenWithBadID,
+			oidc.ClientCredentials{ID: "client-foo", Secret: "secret-foo"},
+			refresh.ErrorInvalidToken,
+			"",
+		},
+		{
+			// The token's payload content is invalid.
+			tokenWithBadPayload,
 			oidc.ClientCredentials{ID: "client-foo", Secret: "secret-foo"},
 			refresh.ErrorInvalidToken,
 			"",
@@ -428,13 +474,42 @@ func TestDBRefreshRepoRevoke(t *testing.T) {
 		t.Fatalf("Unexpected error: %v", err)
 	}
 
+	badTokenPayload, err := refresh.DefaultRefreshTokenGenerator()
+	if err != nil {
+		t.Fatalf("Unexpected error: %v", err)
+	}
+	tokenWithBadID := "404" + token[1:]
+	tokenWithBadPayload := buildRefreshToken(1, badTokenPayload)
+
 	tests := []struct {
 		token  string
 		userID string
 		err    error
 	}{
 		{
-			"invalid-token-foo",
+			"invalid-token-format",
+			"user-foo",
+			refresh.ErrorInvalidToken,
+		},
+		{
+			"1/invalid-base64-encoded-format",
+			"user-foo",
+			refresh.ErrorInvalidToken,
+		},
+		{
+			token + "corrupted-token-payload",
+			"user-foo",
+			refresh.ErrorInvalidToken,
+		},
+		{
+			// The token's ID is invalid.
+			tokenWithBadID,
+			"user-foo",
+			refresh.ErrorInvalidToken,
+		},
+		{
+			// The token's payload is invalid.
+			tokenWithBadPayload,
 			"user-foo",
 			refresh.ErrorInvalidToken,
 		},

refresh/refreshtest/repo.go

@@ -10,9 +10,9 @@ import (
 // The tokens are in the form { refresh-1, refresh-2 ... refresh-n}.
 func NewTestRefreshTokenRepo() (refresh.RefreshTokenRepo, error) {
 	var tokenIdx int
-	tokenGenerator := func() (string, error) {
+	tokenGenerator := func() ([]byte, error) {
 		tokenIdx++
-		return fmt.Sprintf("refresh-%d", tokenIdx), nil
+		return []byte(fmt.Sprintf("refresh-%d", tokenIdx)), nil
 	}
 	return refresh.NewRefreshTokenRepoWithTokenGenerator(tokenGenerator), nil
 }

refresh/repo.go

 package refresh
 
 import (
+	"bytes"
 	"crypto/rand"
-	"encoding/base64"
 	"errors"
 	"fmt"
 	"strconv"
@@ -17,25 +17,26 @@ const (
 var (
 	ErrorInvalidUserID   = errors.New("invalid user ID")
 	ErrorInvalidClientID = errors.New("invalid client ID")
+
 	ErrorInvalidToken = errors.New("invalid token")
 )
 
-type RefreshTokenGenerator func() (string, error)
+type RefreshTokenGenerator func() ([]byte, error)
 
-func (g RefreshTokenGenerator) Generate() (string, error) {
+func (g RefreshTokenGenerator) Generate() ([]byte, error) {
 	return g()
 }
 
-func DefaultRefreshTokenGenerator() (string, error) {
+func DefaultRefreshTokenGenerator() ([]byte, error) {
 	// TODO(yifan) Remove this duplicated token generate function.
 	b := make([]byte, DefaultRefreshTokenPayloadLength)
 	n, err := rand.Read(b)
 	if err != nil {
-		return "", err
+		return nil, err
 	} else if n != DefaultRefreshTokenPayloadLength {
-		return "", errors.New("unable to read enough random bytes")
+		return nil, errors.New("unable to read enough random bytes")
 	}
-	return base64.URLEncoding.EncodeToString(b), nil
+	return b, nil
 }
 
 type RefreshTokenRepo interface {
@@ -52,7 +53,7 @@ type RefreshTokenRepo interface {
 }
 
 type refreshToken struct {
-	payload  string
+	payload  []byte
 	userID   string
 	clientID string
 }
@@ -63,21 +64,21 @@ type memRefreshTokenRepo struct {
 }
 
 // buildToken combines the token ID and token payload to create a new token.
-func buildToken(tokenID int, tokenPayload string) string {
+func buildToken(tokenID int, tokenPayload []byte) string {
 	return fmt.Sprintf("%d%s%s", tokenID, TokenDelimer, tokenPayload)
 }
 
 // parseToken parses a token and returns the token ID and token payload.
-func parseToken(token string) (int, string, error) {
+func parseToken(token string) (int, []byte, error) {
 	parts := strings.SplitN(token, TokenDelimer, 2)
 	if len(parts) != 2 {
-		return -1, "", ErrorInvalidToken
+		return -1, nil, ErrorInvalidToken
 	}
 	id, err := strconv.Atoi(parts[0])
 	if err != nil {
-		return -1, "", ErrorInvalidToken
+		return -1, nil, ErrorInvalidToken
 	}
-	return id, parts[1], nil
+	return id, []byte(parts[1]), nil
 }
 
 // NewRefreshTokenRepo returns an in-memory RefreshTokenRepo useful for development.
@@ -131,7 +132,7 @@ func (r *memRefreshTokenRepo) Verify(clientID, token string) (string, error) {
 		return "", ErrorInvalidToken
 	}
 
-	if record.payload != tokenPayload {
+	if !bytes.Equal(record.payload, tokenPayload) {
 		return "", ErrorInvalidToken
 	}
 
@@ -153,7 +154,7 @@ func (r *memRefreshTokenRepo) Revoke(userID, token string) error {
 		return ErrorInvalidToken
 	}
 
-	if record.payload != tokenPayload {
+	if !bytes.Equal(record.payload, tokenPayload) {
 		return ErrorInvalidToken
 	}
 

server/server_test.go

@@ -397,7 +397,7 @@ func TestServerTokenFail(t *testing.T) {
 		signer       jose.Signer
 		argCC        oidc.ClientCredentials
 		argKey       string
-		err          string
+		err          error
 		scope        []string
 		refreshToken string
 	}{
@@ -423,7 +423,7 @@ func TestServerTokenFail(t *testing.T) {
 			signer: signerFixture,
 			argCC:  ccFixture,
 			argKey: "foo",
-			err:    oauth2.ErrorInvalidGrant,
+			err:    oauth2.NewError(oauth2.ErrorInvalidGrant),
 			scope:  []string{"openid", "offline_access"},
 		},
 
@@ -432,7 +432,7 @@ func TestServerTokenFail(t *testing.T) {
 			signer: signerFixture,
 			argCC:  oidc.ClientCredentials{ID: "YYY"},
 			argKey: keyFixture,
-			err:    oauth2.ErrorInvalidClient,
+			err:    oauth2.NewError(oauth2.ErrorInvalidClient),
 			scope:  []string{"openid", "offline_access"},
 		},
 
@@ -441,7 +441,7 @@ func TestServerTokenFail(t *testing.T) {
 			signer: &StaticSigner{sig: nil, err: errors.New("fail")},
 			argCC:  ccFixture,
 			argKey: keyFixture,
-			err:    oauth2.ErrorServerError,
+			err:    oauth2.NewError(oauth2.ErrorServerError),
 			scope:  []string{"openid", "offline_access"},
 		},
 	}
@@ -502,18 +502,14 @@ func TestServerTokenFail(t *testing.T) {
 			t.Fatalf("case %d: expect refresh token %q, got %q", i, tt.refreshToken, token)
 			panic("")
 		}
-		if tt.err == "" {
-			if err != nil {
-				t.Errorf("case %d: got non-nil error: %v", i, err)
-			} else if jwt == nil {
-				t.Errorf("case %d: got nil JWT", i)
+		if !reflect.DeepEqual(err, tt.err) {
+			t.Errorf("case %d: expect %v, got %v", i, tt.err, err)
 		}
-		} else {
-			if err.Error() != tt.err {
-				t.Errorf("case %d: want err %q, got %q", i, tt.err, err.Error())
-			} else if jwt != nil {
-				t.Errorf("case %d: got non-nil JWT", i)
+		if err == nil && jwt == nil {
+			t.Errorf("case %d: got nil JWT", i)
 		}
+		if err != nil && jwt != nil {
+			t.Errorf("case %d: got non-nil JWT %v", i, jwt)
 		}
 	}
 }
@@ -537,7 +533,7 @@ func TestServerRefreshToken(t *testing.T) {
 		clientID string // The client that associates with the token.
 		creds    oidc.ClientCredentials
 		signer   jose.Signer
-		err      string
+		err      error
 	}{
 		// Everything is good.
 		{
@@ -545,7 +541,7 @@ func TestServerRefreshToken(t *testing.T) {
 			"XXX",
 			credXXX,
 			signerFixture,
-			"",
+			nil,
 		},
 		// Invalid refresh token(malformatted).
 		{
@@ -553,15 +549,23 @@ func TestServerRefreshToken(t *testing.T) {
 			"XXX",
 			credXXX,
 			signerFixture,
-			oauth2.ErrorInvalidRequest,
+			oauth2.NewError(oauth2.ErrorInvalidRequest),
 		},
-		// Invalid refresh token.
+		// Invalid refresh token(invalid payload content).
 		{
-			"0/refresh-1",
+			"0/refresh-2",
 			"XXX",
 			credXXX,
 			signerFixture,
-			oauth2.ErrorInvalidRequest,
+			oauth2.NewError(oauth2.ErrorInvalidRequest),
+		},
+		// Invalid refresh token(invalid ID content).
+		{
+			"1/refresh-2",
+			"XXX",
+			credXXX,
+			signerFixture,
+			oauth2.NewError(oauth2.ErrorInvalidRequest),
 		},
 		// Invalid client(client is not associated with the token).
 		{
@@ -569,7 +573,7 @@ func TestServerRefreshToken(t *testing.T) {
 			"XXX",
 			credYYY,
 			signerFixture,
-			oauth2.ErrorInvalidClient,
+			oauth2.NewError(oauth2.ErrorInvalidClient),
 		},
 		// Invalid client(no client ID).
 		{
@@ -577,7 +581,7 @@ func TestServerRefreshToken(t *testing.T) {
 			"XXX",
 			oidc.ClientCredentials{ID: "", Secret: "aaa"},
 			signerFixture,
-			oauth2.ErrorInvalidClient,
+			oauth2.NewError(oauth2.ErrorInvalidClient),
 		},
 		// Invalid client(no such client).
 		{
@@ -585,7 +589,7 @@ func TestServerRefreshToken(t *testing.T) {
 			"XXX",
 			oidc.ClientCredentials{ID: "AAA", Secret: "aaa"},
 			signerFixture,
-			oauth2.ErrorInvalidClient,
+			oauth2.NewError(oauth2.ErrorInvalidClient),
 		},
 		// Invalid client(no secrets).
 		{
@@ -593,7 +597,7 @@ func TestServerRefreshToken(t *testing.T) {
 			"XXX",
 			oidc.ClientCredentials{ID: "XXX"},
 			signerFixture,
-			oauth2.ErrorInvalidClient,
+			oauth2.NewError(oauth2.ErrorInvalidClient),
 		},
 		// Invalid client(invalid secret).
 		{
@@ -601,7 +605,7 @@ func TestServerRefreshToken(t *testing.T) {
 			"XXX",
 			oidc.ClientCredentials{ID: "XXX", Secret: "bad-secret"},
 			signerFixture,
-			oauth2.ErrorInvalidClient,
+			oauth2.NewError(oauth2.ErrorInvalidClient),
 		},
 		// Signing operation fails.
 		{
@@ -609,7 +613,7 @@ func TestServerRefreshToken(t *testing.T) {
 			"XXX",
 			credXXX,
 			&StaticSigner{sig: nil, err: errors.New("fail")},
-			oauth2.ErrorServerError,
+			oauth2.NewError(oauth2.ErrorServerError),
 		},
 	}
 
@@ -646,11 +650,9 @@ func TestServerRefreshToken(t *testing.T) {
 		}
 
 		jwt, err := srv.RefreshToken(tt.creds, tt.token)
-		if err != nil {
-			if err.Error() != tt.err {
+		if !reflect.DeepEqual(err, tt.err) {
 			t.Errorf("Case %d: expect: %v, got: %v", i, tt.err, err)
 		}
-		}
 
 		if jwt != nil {
 			if string(jwt.Signature) != "beer" {
@@ -715,7 +717,7 @@ func TestServerRefreshToken(t *testing.T) {
 	srv.UserRepo = userRepo
 
 	_, err = srv.RefreshToken(credXXX, "0/refresh-1")
-	if err == nil || err.Error() != oauth2.ErrorServerError {
-		t.Errorf("Expect: %v, got: %v", oauth2.ErrorServerError, err)
+	if !reflect.DeepEqual(err, oauth2.NewError(oauth2.ErrorServerError)) {
+		t.Errorf("Expect: %v, got: %v", oauth2.NewError(oauth2.ErrorServerError), err)
 	}
 }