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c6c829fe3f
Closes #27455 > The mechanism responsible for long-term authentication (the 'remember me' cookie) uses a weak construction technique. It will hash the user's hashed password and the rands value; it will then call the secure cookie code, which will encrypt the user's name with the computed hash. If one were able to dump the database, they could extract those two values to rebuild that cookie and impersonate a user. That vulnerability exists from the date the dump was obtained until a user changed their password. > > To fix this security issue, the cookie could be created and verified using a different technique such as the one explained at https://paragonie.com/blog/2015/04/secure-authentication-php-with-long-term-persistence#secure-remember-me-cookies. The PR removes the now obsolete setting `COOKIE_USERNAME`.
160 lines
6.1 KiB
Go
160 lines
6.1 KiB
Go
// Copyright 2023 The Gitea Authors. All rights reserved.
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// SPDX-License-Identifier: MIT
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package setting
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import (
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"net/url"
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"os"
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"strings"
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"code.gitea.io/gitea/modules/auth/password/hash"
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"code.gitea.io/gitea/modules/generate"
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"code.gitea.io/gitea/modules/log"
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)
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var (
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// Security settings
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InstallLock bool
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SecretKey string
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InternalToken string // internal access token
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LogInRememberDays int
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CookieRememberName string
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ReverseProxyAuthUser string
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ReverseProxyAuthEmail string
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ReverseProxyAuthFullName string
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ReverseProxyLimit int
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ReverseProxyTrustedProxies []string
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MinPasswordLength int
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ImportLocalPaths bool
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DisableGitHooks bool
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DisableWebhooks bool
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OnlyAllowPushIfGiteaEnvironmentSet bool
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PasswordComplexity []string
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PasswordHashAlgo string
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PasswordCheckPwn bool
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SuccessfulTokensCacheSize int
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CSRFCookieName = "_csrf"
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CSRFCookieHTTPOnly = true
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)
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// loadSecret load the secret from ini by uriKey or verbatimKey, only one of them could be set
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// If the secret is loaded from uriKey (file), the file should be non-empty, to guarantee the behavior stable and clear.
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func loadSecret(sec ConfigSection, uriKey, verbatimKey string) string {
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// don't allow setting both URI and verbatim string
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uri := sec.Key(uriKey).String()
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verbatim := sec.Key(verbatimKey).String()
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if uri != "" && verbatim != "" {
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log.Fatal("Cannot specify both %s and %s", uriKey, verbatimKey)
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}
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// if we have no URI, use verbatim
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if uri == "" {
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return verbatim
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}
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tempURI, err := url.Parse(uri)
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if err != nil {
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log.Fatal("Failed to parse %s (%s): %v", uriKey, uri, err)
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}
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switch tempURI.Scheme {
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case "file":
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buf, err := os.ReadFile(tempURI.RequestURI())
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if err != nil {
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log.Fatal("Failed to read %s (%s): %v", uriKey, tempURI.RequestURI(), err)
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}
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val := strings.TrimSpace(string(buf))
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if val == "" {
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// The file shouldn't be empty, otherwise we can not know whether the user has ever set the KEY or KEY_URI
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// For example: if INTERNAL_TOKEN_URI=file:///empty-file,
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// Then if the token is re-generated during installation and saved to INTERNAL_TOKEN
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// Then INTERNAL_TOKEN and INTERNAL_TOKEN_URI both exist, that's a fatal error (they shouldn't)
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log.Fatal("Failed to read %s (%s): the file is empty", uriKey, tempURI.RequestURI())
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}
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return val
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// only file URIs are allowed
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default:
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log.Fatal("Unsupported URI-Scheme %q (%q = %q)", tempURI.Scheme, uriKey, uri)
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return ""
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}
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}
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// generateSaveInternalToken generates and saves the internal token to app.ini
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func generateSaveInternalToken(rootCfg ConfigProvider) {
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token, err := generate.NewInternalToken()
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if err != nil {
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log.Fatal("Error generate internal token: %v", err)
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}
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InternalToken = token
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saveCfg, err := rootCfg.PrepareSaving()
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if err != nil {
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log.Fatal("Error saving internal token: %v", err)
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}
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rootCfg.Section("security").Key("INTERNAL_TOKEN").SetValue(token)
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saveCfg.Section("security").Key("INTERNAL_TOKEN").SetValue(token)
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if err = saveCfg.Save(); err != nil {
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log.Fatal("Error saving internal token: %v", err)
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}
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}
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func loadSecurityFrom(rootCfg ConfigProvider) {
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sec := rootCfg.Section("security")
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InstallLock = HasInstallLock(rootCfg)
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LogInRememberDays = sec.Key("LOGIN_REMEMBER_DAYS").MustInt(7)
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SecretKey = loadSecret(sec, "SECRET_KEY_URI", "SECRET_KEY")
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if SecretKey == "" {
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// FIXME: https://github.com/go-gitea/gitea/issues/16832
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// Until it supports rotating an existing secret key, we shouldn't move users off of the widely used default value
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SecretKey = "!#@FDEWREWR&*(" //nolint:gosec
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}
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CookieRememberName = sec.Key("COOKIE_REMEMBER_NAME").MustString("gitea_incredible")
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ReverseProxyAuthUser = sec.Key("REVERSE_PROXY_AUTHENTICATION_USER").MustString("X-WEBAUTH-USER")
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ReverseProxyAuthEmail = sec.Key("REVERSE_PROXY_AUTHENTICATION_EMAIL").MustString("X-WEBAUTH-EMAIL")
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ReverseProxyAuthFullName = sec.Key("REVERSE_PROXY_AUTHENTICATION_FULL_NAME").MustString("X-WEBAUTH-FULLNAME")
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ReverseProxyLimit = sec.Key("REVERSE_PROXY_LIMIT").MustInt(1)
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ReverseProxyTrustedProxies = sec.Key("REVERSE_PROXY_TRUSTED_PROXIES").Strings(",")
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if len(ReverseProxyTrustedProxies) == 0 {
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ReverseProxyTrustedProxies = []string{"127.0.0.0/8", "::1/128"}
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}
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MinPasswordLength = sec.Key("MIN_PASSWORD_LENGTH").MustInt(8)
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ImportLocalPaths = sec.Key("IMPORT_LOCAL_PATHS").MustBool(false)
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DisableGitHooks = sec.Key("DISABLE_GIT_HOOKS").MustBool(true)
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DisableWebhooks = sec.Key("DISABLE_WEBHOOKS").MustBool(false)
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OnlyAllowPushIfGiteaEnvironmentSet = sec.Key("ONLY_ALLOW_PUSH_IF_GITEA_ENVIRONMENT_SET").MustBool(true)
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// Ensure that the provided default hash algorithm is a valid hash algorithm
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var algorithm *hash.PasswordHashAlgorithm
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PasswordHashAlgo, algorithm = hash.SetDefaultPasswordHashAlgorithm(sec.Key("PASSWORD_HASH_ALGO").MustString(""))
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if algorithm == nil {
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log.Fatal("The provided password hash algorithm was invalid: %s", sec.Key("PASSWORD_HASH_ALGO").MustString(""))
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}
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CSRFCookieHTTPOnly = sec.Key("CSRF_COOKIE_HTTP_ONLY").MustBool(true)
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PasswordCheckPwn = sec.Key("PASSWORD_CHECK_PWN").MustBool(false)
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SuccessfulTokensCacheSize = sec.Key("SUCCESSFUL_TOKENS_CACHE_SIZE").MustInt(20)
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InternalToken = loadSecret(sec, "INTERNAL_TOKEN_URI", "INTERNAL_TOKEN")
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if InstallLock && InternalToken == "" {
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// if Gitea has been installed but the InternalToken hasn't been generated (upgrade from an old release), we should generate
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// some users do cluster deployment, they still depend on this auto-generating behavior.
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generateSaveInternalToken(rootCfg)
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}
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cfgdata := sec.Key("PASSWORD_COMPLEXITY").Strings(",")
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if len(cfgdata) == 0 {
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cfgdata = []string{"off"}
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}
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PasswordComplexity = make([]string, 0, len(cfgdata))
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for _, name := range cfgdata {
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name := strings.ToLower(strings.Trim(name, `"`))
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if name != "" {
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PasswordComplexity = append(PasswordComplexity, name)
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}
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}
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}
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