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Port "Use general token signing secret"

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Port of https://github.com/go-gitea/gitea/pull/29205

Use a clearly defined "signing secret" for token signing.

(cherry picked from commit 8be198cdef0a486f417663b1fd6878458d7e5d92)
This commit is contained in:
wxiaoguang 2024-02-19 01:39:04 +08:00 • committed by Gusted
parent cfd6420a0e
commit 62d3e5255f
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GPG key ID: FD821B732837125F
13 changed files with 131 additions and 61 deletions
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23
modules/setting/lfs.go
View file

@ -4,22 +4,19 @@
package setting
import (
"encoding/base64"
"fmt"
"time"
"code.gitea.io/gitea/modules/generate"
"code.gitea.io/gitea/modules/util"
)
// LFS represents the configuration for Git LFS
var LFS = struct {
StartServer bool `ini:"LFS_START_SERVER"`
JWTSecretBase64 string `ini:"LFS_JWT_SECRET"`
JWTSecretBytes []byte `ini:"-"`
HTTPAuthExpiry time.Duration `ini:"LFS_HTTP_AUTH_EXPIRY"`
MaxFileSize int64 `ini:"LFS_MAX_FILE_SIZE"`
LocksPagingNum int `ini:"LFS_LOCKS_PAGING_NUM"`
StartServer bool `ini:"LFS_START_SERVER"`
JWTSecretBytes []byte `ini:"-"`
HTTPAuthExpiry time.Duration `ini:"LFS_HTTP_AUTH_EXPIRY"`
MaxFileSize int64 `ini:"LFS_MAX_FILE_SIZE"`
LocksPagingNum int `ini:"LFS_LOCKS_PAGING_NUM"`
Storage *Storage
}{}
@ -61,10 +58,10 @@ func loadLFSFrom(rootCfg ConfigProvider) error {
return nil
}
LFS.JWTSecretBase64 = loadSecret(rootCfg.Section("server"), "LFS_JWT_SECRET_URI", "LFS_JWT_SECRET")
LFS.JWTSecretBytes, err = util.Base64FixedDecode(base64.RawURLEncoding, []byte(LFS.JWTSecretBase64), 32)
jwtSecretBase64 := loadSecret(rootCfg.Section("server"), "LFS_JWT_SECRET_URI", "LFS_JWT_SECRET")
LFS.JWTSecretBytes, err = generate.DecodeJwtSecret(jwtSecretBase64)
if err != nil {
LFS.JWTSecretBytes, LFS.JWTSecretBase64, err = generate.NewJwtSecret()
LFS.JWTSecretBytes, jwtSecretBase64, err = generate.NewJwtSecret()
if err != nil {
return fmt.Errorf("error generating JWT Secret for custom config: %v", err)
}
@ -74,8 +71,8 @@ func loadLFSFrom(rootCfg ConfigProvider) error {
if err != nil {
return fmt.Errorf("error saving JWT Secret for custom config: %v", err)
}
rootCfg.Section("server").Key("LFS_JWT_SECRET").SetValue(LFS.JWTSecretBase64)
saveCfg.Section("server").Key("LFS_JWT_SECRET").SetValue(LFS.JWTSecretBase64)
rootCfg.Section("server").Key("LFS_JWT_SECRET").SetValue(jwtSecretBase64)
saveCfg.Section("server").Key("LFS_JWT_SECRET").SetValue(jwtSecretBase64)
if err := saveCfg.Save(); err != nil {
return fmt.Errorf("error saving JWT Secret for custom config: %v", err)
}

38
modules/setting/oauth2.go
View file

@ -4,13 +4,12 @@
package setting
import (
"encoding/base64"
"math"
"path/filepath"
"sync/atomic"
"code.gitea.io/gitea/modules/generate"
"code.gitea.io/gitea/modules/log"
"code.gitea.io/gitea/modules/util"
)
// OAuth2UsernameType is enum describing the way gitea 'name' should be generated from oauth2 data
@ -98,7 +97,6 @@ var OAuth2 = struct {
RefreshTokenExpirationTime int64
InvalidateRefreshTokens bool
JWTSigningAlgorithm string `ini:"JWT_SIGNING_ALGORITHM"`
JWTSecretBase64 string `ini:"JWT_SECRET"`
JWTSigningPrivateKeyFile string `ini:"JWT_SIGNING_PRIVATE_KEY_FILE"`
MaxTokenLength int
DefaultApplications []string
@ -130,28 +128,50 @@ func loadOAuth2From(rootCfg ConfigProvider) {
return
}
OAuth2.JWTSecretBase64 = loadSecret(sec, "JWT_SECRET_URI", "JWT_SECRET")
jwtSecretBase64 := loadSecret(sec, "JWT_SECRET_URI", "JWT_SECRET")
if !filepath.IsAbs(OAuth2.JWTSigningPrivateKeyFile) {
OAuth2.JWTSigningPrivateKeyFile = filepath.Join(AppDataPath, OAuth2.JWTSigningPrivateKeyFile)
}
if InstallLock {
if _, err := util.Base64FixedDecode(base64.RawURLEncoding, []byte(OAuth2.JWTSecretBase64), 32); err != nil {
_, OAuth2.JWTSecretBase64, err = generate.NewJwtSecret()
jwtSecretBytes, err := generate.DecodeJwtSecret(jwtSecretBase64)
if err != nil {
jwtSecretBytes, jwtSecretBase64, err = generate.NewJwtSecret()
if err != nil {
log.Fatal("error generating JWT secret: %v", err)
}
saveCfg, err := rootCfg.PrepareSaving()
if err != nil {
log.Fatal("save oauth2.JWT_SECRET failed: %v", err)
}
rootCfg.Section("oauth2").Key("JWT_SECRET").SetValue(OAuth2.JWTSecretBase64)
saveCfg.Section("oauth2").Key("JWT_SECRET").SetValue(OAuth2.JWTSecretBase64)
rootCfg.Section("oauth2").Key("JWT_SECRET").SetValue(jwtSecretBase64)
saveCfg.Section("oauth2").Key("JWT_SECRET").SetValue(jwtSecretBase64)
if err := saveCfg.Save(); err != nil {
log.Fatal("save oauth2.JWT_SECRET failed: %v", err)
}
}
generalSigningSecret.Store(&jwtSecretBytes)
}
}
// generalSigningSecret is used as container for a []byte value
// instead of an additional mutex, we use CompareAndSwap func to change the value thread save
var generalSigningSecret atomic.Pointer[[]byte]
func GetGeneralTokenSigningSecret() []byte {
old := generalSigningSecret.Load()
if old == nil || len(*old) == 0 {
jwtSecret, _, err := generate.NewJwtSecret()
if err != nil {
log.Fatal("Unable to generate general JWT secret: %s", err.Error())
}
if generalSigningSecret.CompareAndSwap(old, &jwtSecret) {
// FIXME: in main branch, the signing token should be refactored (eg: one unique for LFS/OAuth2/etc ...)
log.Warn("OAuth2 is not enabled, unable to use a persistent signing secret, a new one is generated, which is not persistent between restarts and cluster nodes")
return jwtSecret
}
return *generalSigningSecret.Load()
}
return *old
}

34
modules/setting/oauth2_test.go Normal file
View file

@ -0,0 +1,34 @@
// Copyright 2024 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package setting
import (
"testing"
"code.gitea.io/gitea/modules/generate"
"code.gitea.io/gitea/modules/test"
"github.com/stretchr/testify/assert"
)
func TestGetGeneralSigningSecret(t *testing.T) {
// when there is no general signing secret, it should be generated, and keep the same value
assert.Nil(t, generalSigningSecret.Load())
s1 := GetGeneralTokenSigningSecret()
assert.NotNil(t, s1)
s2 := GetGeneralTokenSigningSecret()
assert.Equal(t, s1, s2)
// the config value should always override any pre-generated value
cfg, _ := NewConfigProviderFromData(`
[oauth2]
JWT_SECRET = BBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB
`)
defer test.MockVariableValue(&InstallLock, true)()
loadOAuth2From(cfg)
actual := GetGeneralTokenSigningSecret()
expected, _ := generate.DecodeJwtSecret("BBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB")
assert.Len(t, actual, 32)
assert.EqualValues(t, expected, actual)
}