forgejo/modules/setting/security.go
Gusted 8d2dab94a6
[GITEA] rework long-term authentication
- The current architecture is inherently insecure, because you can
construct the 'secret' cookie value with values that are available in
the database. Thus provides zero protection when a database is
dumped/leaked.
- This patch implements a new architecture that's inspired from: [Paragonie Initiative](https://paragonie.com/blog/2015/04/secure-authentication-php-with-long-term-persistence#secure-remember-me-cookies).
- Integration testing is added to ensure the new mechanism works.
- Removes a setting, because it's not used anymore.

(cherry picked from commit eff097448b)

[GITEA] rework long-term authentication (squash) add migration

Reminder: the migration is run via integration tests as explained
in the commit "[DB] run all Forgejo migrations in integration tests"

(cherry picked from commit 4accf7443c)
(cherry picked from commit 99d06e344ebc3b50bafb2ac4473dd95f057d1ddc)
(cherry picked from commit d8bc98a8f0)
(cherry picked from commit 6404845df9)
(cherry picked from commit 72bdd4f3b9)
(cherry picked from commit 4b01bb0ce8)
(cherry picked from commit c26ac31816)
2023-11-13 14:06:31 +01:00

160 lines
6.1 KiB
Go

// Copyright 2023 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package setting
import (
"net/url"
"os"
"strings"
"code.gitea.io/gitea/modules/auth/password/hash"
"code.gitea.io/gitea/modules/generate"
"code.gitea.io/gitea/modules/log"
)
var (
// Security settings
InstallLock bool
SecretKey string
InternalToken string // internal access token
LogInRememberDays int
CookieRememberName string
ReverseProxyAuthUser string
ReverseProxyAuthEmail string
ReverseProxyAuthFullName string
ReverseProxyLimit int
ReverseProxyTrustedProxies []string
MinPasswordLength int
ImportLocalPaths bool
DisableGitHooks bool
DisableWebhooks bool
OnlyAllowPushIfGiteaEnvironmentSet bool
PasswordComplexity []string
PasswordHashAlgo string
PasswordCheckPwn bool
SuccessfulTokensCacheSize int
CSRFCookieName = "_csrf"
CSRFCookieHTTPOnly = true
)
// loadSecret load the secret from ini by uriKey or verbatimKey, only one of them could be set
// If the secret is loaded from uriKey (file), the file should be non-empty, to guarantee the behavior stable and clear.
func loadSecret(sec ConfigSection, uriKey, verbatimKey string) string {
// don't allow setting both URI and verbatim string
uri := sec.Key(uriKey).String()
verbatim := sec.Key(verbatimKey).String()
if uri != "" && verbatim != "" {
log.Fatal("Cannot specify both %s and %s", uriKey, verbatimKey)
}
// if we have no URI, use verbatim
if uri == "" {
return verbatim
}
tempURI, err := url.Parse(uri)
if err != nil {
log.Fatal("Failed to parse %s (%s): %v", uriKey, uri, err)
}
switch tempURI.Scheme {
case "file":
buf, err := os.ReadFile(tempURI.RequestURI())
if err != nil {
log.Fatal("Failed to read %s (%s): %v", uriKey, tempURI.RequestURI(), err)
}
val := strings.TrimSpace(string(buf))
if val == "" {
// The file shouldn't be empty, otherwise we can not know whether the user has ever set the KEY or KEY_URI
// For example: if INTERNAL_TOKEN_URI=file:///empty-file,
// Then if the token is re-generated during installation and saved to INTERNAL_TOKEN
// Then INTERNAL_TOKEN and INTERNAL_TOKEN_URI both exist, that's a fatal error (they shouldn't)
log.Fatal("Failed to read %s (%s): the file is empty", uriKey, tempURI.RequestURI())
}
return val
// only file URIs are allowed
default:
log.Fatal("Unsupported URI-Scheme %q (%q = %q)", tempURI.Scheme, uriKey, uri)
return ""
}
}
// generateSaveInternalToken generates and saves the internal token to app.ini
func generateSaveInternalToken(rootCfg ConfigProvider) {
token, err := generate.NewInternalToken()
if err != nil {
log.Fatal("Error generate internal token: %v", err)
}
InternalToken = token
saveCfg, err := rootCfg.PrepareSaving()
if err != nil {
log.Fatal("Error saving internal token: %v", err)
}
rootCfg.Section("security").Key("INTERNAL_TOKEN").SetValue(token)
saveCfg.Section("security").Key("INTERNAL_TOKEN").SetValue(token)
if err = saveCfg.Save(); err != nil {
log.Fatal("Error saving internal token: %v", err)
}
}
func loadSecurityFrom(rootCfg ConfigProvider) {
sec := rootCfg.Section("security")
InstallLock = HasInstallLock(rootCfg)
LogInRememberDays = sec.Key("LOGIN_REMEMBER_DAYS").MustInt(7)
SecretKey = loadSecret(sec, "SECRET_KEY_URI", "SECRET_KEY")
if SecretKey == "" {
// FIXME: https://github.com/go-gitea/gitea/issues/16832
// Until it supports rotating an existing secret key, we shouldn't move users off of the widely used default value
SecretKey = "!#@FDEWREWR&*(" //nolint:gosec
}
CookieRememberName = sec.Key("COOKIE_REMEMBER_NAME").MustString("gitea_incredible")
ReverseProxyAuthUser = sec.Key("REVERSE_PROXY_AUTHENTICATION_USER").MustString("X-WEBAUTH-USER")
ReverseProxyAuthEmail = sec.Key("REVERSE_PROXY_AUTHENTICATION_EMAIL").MustString("X-WEBAUTH-EMAIL")
ReverseProxyAuthFullName = sec.Key("REVERSE_PROXY_AUTHENTICATION_FULL_NAME").MustString("X-WEBAUTH-FULLNAME")
ReverseProxyLimit = sec.Key("REVERSE_PROXY_LIMIT").MustInt(1)
ReverseProxyTrustedProxies = sec.Key("REVERSE_PROXY_TRUSTED_PROXIES").Strings(",")
if len(ReverseProxyTrustedProxies) == 0 {
ReverseProxyTrustedProxies = []string{"127.0.0.0/8", "::1/128"}
}
MinPasswordLength = sec.Key("MIN_PASSWORD_LENGTH").MustInt(8)
ImportLocalPaths = sec.Key("IMPORT_LOCAL_PATHS").MustBool(false)
DisableGitHooks = sec.Key("DISABLE_GIT_HOOKS").MustBool(true)
DisableWebhooks = sec.Key("DISABLE_WEBHOOKS").MustBool(false)
OnlyAllowPushIfGiteaEnvironmentSet = sec.Key("ONLY_ALLOW_PUSH_IF_GITEA_ENVIRONMENT_SET").MustBool(true)
// Ensure that the provided default hash algorithm is a valid hash algorithm
var algorithm *hash.PasswordHashAlgorithm
PasswordHashAlgo, algorithm = hash.SetDefaultPasswordHashAlgorithm(sec.Key("PASSWORD_HASH_ALGO").MustString(""))
if algorithm == nil {
log.Fatal("The provided password hash algorithm was invalid: %s", sec.Key("PASSWORD_HASH_ALGO").MustString(""))
}
CSRFCookieHTTPOnly = sec.Key("CSRF_COOKIE_HTTP_ONLY").MustBool(true)
PasswordCheckPwn = sec.Key("PASSWORD_CHECK_PWN").MustBool(false)
SuccessfulTokensCacheSize = sec.Key("SUCCESSFUL_TOKENS_CACHE_SIZE").MustInt(20)
InternalToken = loadSecret(sec, "INTERNAL_TOKEN_URI", "INTERNAL_TOKEN")
if InstallLock && InternalToken == "" {
// if Gitea has been installed but the InternalToken hasn't been generated (upgrade from an old release), we should generate
// some users do cluster deployment, they still depend on this auto-generating behavior.
generateSaveInternalToken(rootCfg)
}
cfgdata := sec.Key("PASSWORD_COMPLEXITY").Strings(",")
if len(cfgdata) == 0 {
cfgdata = []string{"off"}
}
PasswordComplexity = make([]string, 0, len(cfgdata))
for _, name := range cfgdata {
name := strings.ToLower(strings.Trim(name, `"`))
if name != "" {
PasswordComplexity = append(PasswordComplexity, name)
}
}
}