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Pull request: HOFTIX-csrf

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Merge in DNS/adguard-home from HOFTIX-csrf to master

Squashed commit of the following:

commit 75ab27bf6c52b80ab4e7347d7c254fa659eac244
Author: Ainar Garipov <A.Garipov@AdGuard.COM>
Date:   Thu Sep 29 18:45:54 2022 +0300

    all: imp cookie security; rm plain-text apis
This commit is contained in:
Ainar Garipov 2022-09-29 19:04:26 +03:00
parent b71a5d86de
commit 756b14a61d
23 changed files with 494 additions and 344 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

35
CHANGELOG.md
View File

@ -17,6 +17,41 @@ and this project adheres to
### Security
#### `SameSite` Policy
The `SameSite` policy on the AdGuard Home session cookies is now set to `Lax`.
Which means that the only cross-site HTTP request for which the browser is
allowed to send the session cookie is navigating to the AdGuard Home domain.
**Users are strongly advised to log out, clear browser cache, and log in again
after updating.**
#### Removal Of Plain-Text APIs (BREAKING API CHANGE)
A Cross-Site Request Forgery (CSRF) vulnerability has been discovered. We have
implemented several measures to prevent such vulnerabilities in the future, but
some of these measures break backwards compatibility for the sake of better
protection.
The following APIs, which previously accepted or returned `text/plain` data,
now accept or return data as JSON. All new formats for the request and response
bodies are documented in `openapi/openapi.yaml` and `openapi/CHANGELOG.md`.
- `GET /control/i18n/current_language`;
- `POST /control/dhcp/find_active_dhcp`;
- `POST /control/filtering/set_rules`;
- `POST /control/i18n/change_language`.
The CVE number is to be assigned. We thank Daniel Elkabes from Mend.io for
reporting this vulnerability to us.
#### Stricter Content-Type Checks (BREAKING API CHANGE)
All JSON APIs now check if the request actually has the `application/json`
content-type.
#### Other Security Changes
- Weaker cipher suites that use the CBC (cipher block chaining) mode of
operation have been disabled ([#2993]).

18
SECURITY.md Normal file
View File

@ -0,0 +1,18 @@
# Security Policy
## Reporting a Vulnerability
Please send your vulnerability reports to <security@adguard.com>. To make sure
that your report reaches us, please:
1. Include the words “AdGuard Home” and “vulnerability” to the subject line as
well as a short description of the vulnerability. For example:
> AdGuard Home API vulnerability: possible XSS attack
2. Make sure that the message body contains a clear description of the
vulnerability.
If you have not received a reply to your email within 7 days, please make sure
to follow up with us again at <security@adguard.com>. Once again, make sure
that the word “vulnerability” is in the subject line.

4
client/src/actions/filtering.js
View File

@ -31,7 +31,9 @@ export const setRulesSuccess = createAction('SET_RULES_SUCCESS');
export const setRules = (rules) => async (dispatch) => {
dispatch(setRulesRequest());
try {
const normalizedRules = normalizeRulesTextarea(rules);
const normalizedRules = {
rules: normalizeRulesTextarea(rules)?.split('\n'),
};
await apiClient.setRules(normalizedRules);
dispatch(addSuccessToast('updated_custom_filtering_toast'));
dispatch(setRulesSuccess());

11
client/src/actions/index.js
View File

@ -355,7 +355,7 @@ export const changeLanguageSuccess = createAction('CHANGE_LANGUAGE_SUCCESS');
export const changeLanguage = (lang) => async (dispatch) => {
dispatch(changeLanguageRequest());
try {
await apiClient.changeLanguage(lang);
await apiClient.changeLanguage({ language: lang });
dispatch(changeLanguageSuccess());
} catch (error) {
dispatch(addErrorToast({ error }));
@ -370,8 +370,8 @@ export const getLanguageSuccess = createAction('GET_LANGUAGE_SUCCESS');
export const getLanguage = () => async (dispatch) => {
dispatch(getLanguageRequest());
try {
const language = await apiClient.getCurrentLanguage();
dispatch(getLanguageSuccess(language));
const langSettings = await apiClient.getCurrentLanguage();
dispatch(getLanguageSuccess(langSettings.language));
} catch (error) {
dispatch(addErrorToast({ error }));
dispatch(getLanguageFailure());
@ -421,7 +421,10 @@ export const findActiveDhcpFailure = createAction('FIND_ACTIVE_DHCP_FAILURE');
export const findActiveDhcp = (name) => async (dispatch, getState) => {
dispatch(findActiveDhcpRequest());
try {
const activeDhcp = await apiClient.findActiveDhcp(name);
const req = {
interface: name,
};
const activeDhcp = await apiClient.findActiveDhcp(req);
dispatch(findActiveDhcpSuccess(activeDhcp));
const { check, interface_name, interfaces } = getState().dhcp;
const selectedInterface = getState().form[FORM_NAME.DHCP_INTERFACES].values.interface_name;

21
client/src/api/Api.js
View File

@ -130,7 +130,7 @@ class Api {
const { path, method } = this.FILTERING_SET_RULES;
const parameters = {
data: rules,
headers: { 'Content-Type': 'text/plain' },
headers: { 'Content-Type': 'application/json' },
};
return this.makeRequest(path, method, parameters);
}
@ -173,12 +173,7 @@ class Api {
enableParentalControl() {
const { path, method } = this.PARENTAL_ENABLE;
const parameter = 'sensitivity=TEEN'; // this parameter TEEN is hardcoded
const config = {
data: parameter,
headers: { 'Content-Type': 'text/plain' },
};
return this.makeRequest(path, method, config);
return this.makeRequest(path, method);
}
disableParentalControl() {
@ -240,11 +235,11 @@ class Api {
return this.makeRequest(path, method);
}
changeLanguage(lang) {
changeLanguage(config) {
const { path, method } = this.CHANGE_LANGUAGE;
const parameters = {
data: lang,
headers: { 'Content-Type': 'text/plain' },
data: config,
headers: { 'Content-Type': 'application/json' },
};
return this.makeRequest(path, method, parameters);
}
@ -285,11 +280,11 @@ class Api {
return this.makeRequest(path, method, parameters);
}
findActiveDhcp(name) {
findActiveDhcp(req) {
const { path, method } = this.DHCP_FIND_ACTIVE;
const parameters = {
data: name,
headers: { 'Content-Type': 'text/plain' },
data: req,
headers: { 'Content-Type': 'application/json' },
};
return this.makeRequest(path, method, parameters);
}

39
internal/aghhttp/aghhttp.go
View File

@ -2,10 +2,12 @@
package aghhttp
import (
"encoding/json"
"fmt"
"io"
"net/http"
"github.com/AdguardTeam/AdGuardHome/internal/version"
"github.com/AdguardTeam/golibs/log"
)
@ -34,3 +36,40 @@ func Error(r *http.Request, w http.ResponseWriter, code int, format string, args
log.Error("%s %s: %s", r.Method, r.URL, text)
http.Error(w, text, code)
}
// UserAgent returns the ID of the service as a User-Agent string. It can also
// be used as the value of the Server HTTP header.
func UserAgent() (ua string) {
return fmt.Sprintf("AdGuardHome/%s", version.Version())
}
// textPlainDeprMsg is the message returned to API users when they try to use
// an API that used to accept "text/plain" but doesn't anymore.
const textPlainDeprMsg = `using this api with the text/plain content-type is deprecated; ` +
`use application/json`
// WriteTextPlainDeprecated responds to the request with a message about
// deprecation and removal of a plain-text API if the request is made with the
// "text/plain" content-type.
func WriteTextPlainDeprecated(w http.ResponseWriter, r *http.Request) (isPlainText bool) {
if r.Header.Get(HdrNameContentType) != HdrValTextPlain {
return false
}
Error(r, w, http.StatusUnsupportedMediaType, textPlainDeprMsg)
return true
}
// WriteJSONResponse sets the content-type header in w.Header() to
// "application/json", encodes resp to w, calls Error on any returned error, and
// returns it as well.
func WriteJSONResponse(w http.ResponseWriter, r *http.Request, resp any) (err error) {
w.Header().Set(HdrNameContentType, HdrValApplicationJSON)
err = json.NewEncoder(w).Encode(resp)
if err != nil {
Error(r, w, http.StatusInternalServerError, "encoding resp: %s", err)
}
return err
}

22
internal/aghhttp/header.go Normal file
View File

@ -0,0 +1,22 @@
package aghhttp
// HTTP Headers
// HTTP header name constants.
//
// TODO(a.garipov): Remove unused.
const (
HdrNameAcceptEncoding = "Accept-Encoding"
HdrNameAccessControlAllowOrigin = "Access-Control-Allow-Origin"
HdrNameContentType = "Content-Type"
HdrNameContentEncoding = "Content-Encoding"
HdrNameServer = "Server"
HdrNameTrailer = "Trailer"
HdrNameUserAgent = "User-Agent"
)
// HTTP header value constants.
const (
HdrValApplicationJSON = "application/json"
HdrValTextPlain = "text/plain"
)

57
internal/dhcpd/http_unix.go
View File

@ -5,11 +5,9 @@ package dhcpd
import (
"encoding/json"
"fmt"
"io"
"net"
"net/http"
"os"
"strings"
"github.com/AdguardTeam/AdGuardHome/internal/aghalg"
"github.com/AdguardTeam/AdGuardHome/internal/aghhttp"
@ -410,31 +408,37 @@ type dhcpSearchResult struct {
V6 dhcpSearchV6Result `json:"v6"`
}
// Perform the following tasks:
// . Search for another DHCP server running
// . Check if a static IP is configured for the network interface
// Respond with results
// findActiveServerReq is the JSON structure for the request to find active DHCP
// servers.
type findActiveServerReq struct {
Interface string `json:"interface"`
}
// handleDHCPFindActiveServer performs the following tasks:
// 1. searches for another DHCP server in the network;
// 2. check if a static IP is configured for the network interface;
// 3. responds with the results.
func (s *server) handleDHCPFindActiveServer(w http.ResponseWriter, r *http.Request) {
// This use of ReadAll is safe, because request's body is now limited.
body, err := io.ReadAll(r.Body)
if aghhttp.WriteTextPlainDeprecated(w, r) {
return
}
req := &findActiveServerReq{}
err := json.NewDecoder(r.Body).Decode(req)
if err != nil {
msg := fmt.Sprintf("failed to read request body: %s", err)
log.Error(msg)
http.Error(w, msg, http.StatusBadRequest)
aghhttp.Error(r, w, http.StatusBadRequest, "reading req: %s", err)
return
}
ifaceName := strings.TrimSpace(string(body))
ifaceName := req.Interface
if ifaceName == "" {
msg := "empty interface name specified"
log.Error(msg)
http.Error(w, msg, http.StatusBadRequest)
aghhttp.Error(r, w, http.StatusBadRequest, "empty interface name")
return
}
result := dhcpSearchResult{
result := &dhcpSearchResult{
V4: dhcpSearchV4Result{
OtherServer: dhcpSearchOtherResult{
Found: "no",
@ -459,6 +463,14 @@ func (s *server) handleDHCPFindActiveServer(w http.ResponseWriter, r *http.Reque
result.V4.StaticIP.IP = aghnet.GetSubnet(ifaceName).String()
}
setOtherDHCPResult(ifaceName, result)
_ = aghhttp.WriteJSONResponse(w, r, result)
}
// setOtherDHCPResult sets the results of the check for another DHCP server in
// result.
func setOtherDHCPResult(ifaceName string, result *dhcpSearchResult) {
found4, found6, err4, err6 := aghnet.CheckOtherDHCP(ifaceName)
if err4 != nil {
result.V4.OtherServer.Found = "error"
@ -466,24 +478,13 @@ func (s *server) handleDHCPFindActiveServer(w http.ResponseWriter, r *http.Reque
} else if found4 {
result.V4.OtherServer.Found = "yes"
}
if err6 != nil {
result.V6.OtherServer.Found = "error"
result.V6.OtherServer.Error = err6.Error()
} else if found6 {
result.V6.OtherServer.Found = "yes"
}
w.Header().Set("Content-Type", "application/json")
err = json.NewEncoder(w).Encode(result)
if err != nil {
aghhttp.Error(
r,
w,
http.StatusInternalServerError,
"Failed to marshal DHCP found json: %s",
err,
)
}
}
func (s *server) handleDHCPAddStaticLease(w http.ResponseWriter, r *http.Request) {

19
internal/filtering/controlfiltering.go → internal/filtering/http.go
View File

@ -3,13 +3,11 @@ package filtering
import (
"encoding/json"
"fmt"
"io"
"net"
"net/http"
"net/url"
"os"
"path/filepath"
"strings"
"time"
"github.com/AdguardTeam/AdGuardHome/internal/aghhttp"
@ -249,16 +247,25 @@ func (d *DNSFilter) handleFilteringSetURL(w http.ResponseWriter, r *http.Request
}
}
// filteringRulesReq is the JSON structure for settings custom filtering rules.
type filteringRulesReq struct {
Rules []string `json:"rules"`
}
func (d *DNSFilter) handleFilteringSetRules(w http.ResponseWriter, r *http.Request) {
// This use of ReadAll is safe, because request's body is now limited.
body, err := io.ReadAll(r.Body)
if aghhttp.WriteTextPlainDeprecated(w, r) {
return
}
req := &filteringRulesReq{}
err := json.NewDecoder(r.Body).Decode(req)
if err != nil {
aghhttp.Error(r, w, http.StatusBadRequest, "Failed to read request body: %s", err)
aghhttp.Error(r, w, http.StatusBadRequest, "reading req: %s", err)
return
}
d.UserRules = strings.Split(string(body), "\n")
d.UserRules = req.Rules
d.ConfigModified()
d.EnableFilters(true)
}

300
internal/home/auth.go
View File

@ -8,12 +8,14 @@ import (
"fmt"
"net"
"net/http"
"path"
"strconv"
"strings"
"sync"
"time"
"github.com/AdguardTeam/AdGuardHome/internal/aghhttp"
"github.com/AdguardTeam/golibs/errors"
"github.com/AdguardTeam/golibs/log"
"github.com/AdguardTeam/golibs/netutil"
"github.com/AdguardTeam/golibs/timeutil"
@ -32,7 +34,8 @@ const sessionTokenSize = 16
type session struct {
userName string
expire uint32 // expiration time (in seconds)
// expire is the expiration time, in seconds.
expire uint32
}
func (s *session) serialize() []byte {
@ -64,29 +67,29 @@ func (s *session) deserialize(data []byte) bool {
// Auth - global object
type Auth struct {
db *bbolt.DB
blocker *authRateLimiter
sessions map[string]*session
users []User
lock sync.Mutex
sessionTTL uint32
db *bbolt.DB
raleLimiter *authRateLimiter
sessions map[string]*session
users []webUser
lock sync.Mutex
sessionTTL uint32
}
// User object
type User struct {
// webUser represents a user of the Web UI.
type webUser struct {
Name string `yaml:"name"`
PasswordHash string `yaml:"password"` // bcrypt hash
PasswordHash string `yaml:"password"`
}
// InitAuth - create a global object
func InitAuth(dbFilename string, users []User, sessionTTL uint32, blocker *authRateLimiter) *Auth {
func InitAuth(dbFilename string, users []webUser, sessionTTL uint32, rateLimiter *authRateLimiter) *Auth {
log.Info("Initializing auth module: %s", dbFilename)
a := &Auth{
sessionTTL: sessionTTL,
blocker: blocker,
sessions: make(map[string]*session),
users: users,
sessionTTL: sessionTTL,
raleLimiter: rateLimiter,
sessions: make(map[string]*session),
users: users,
}
var err error
a.db, err = bbolt.Open(dbFilename, 0o644, nil)
@ -326,35 +329,25 @@ func newSessionToken() (data []byte, err error) {
return randData, nil
}
// cookieTimeFormat is the format to be used in (time.Time).Format for cookie's
// expiry field.
const cookieTimeFormat = "Mon, 02 Jan 2006 15:04:05 GMT"
// cookieExpiryFormat returns the formatted exp to be used in cookie string.
// It's quite simple for now, but probably will be expanded in the future.
func cookieExpiryFormat(exp time.Time) (formatted string) {
return exp.Format(cookieTimeFormat)
}
func (a *Auth) httpCookie(req loginJSON, addr string) (cookie string, err error) {
blocker := a.blocker
u := a.UserFind(req.Name, req.Password)
if len(u.Name) == 0 {
if blocker != nil {
blocker.inc(addr)
// newCookie creates a new authentication cookie.
func (a *Auth) newCookie(req loginJSON, addr string) (c *http.Cookie, err error) {
rateLimiter := a.raleLimiter
u, ok := a.findUser(req.Name, req.Password)
if !ok {
if rateLimiter != nil {
rateLimiter.inc(addr)
}
return "", err
return nil, errors.Error("invalid username or password")
}
if blocker != nil {
blocker.remove(addr)
if rateLimiter != nil {
rateLimiter.remove(addr)
}
var sess []byte
sess, err = newSessionToken()
sess, err := newSessionToken()
if err != nil {
return "", err
return nil, fmt.Errorf("generating token: %w", err)
}
now := time.Now().UTC()
@ -364,11 +357,15 @@ func (a *Auth) httpCookie(req loginJSON, addr string) (cookie string, err error)
expire: uint32(now.Unix()) + a.sessionTTL,
})
return fmt.Sprintf(
"%s=%s; Path=/; HttpOnly; Expires=%s",
sessionCookieName, hex.EncodeToString(sess),
cookieExpiryFormat(now.Add(cookieTTL)),
), nil
return &http.Cookie{
Name: sessionCookieName,
Value: hex.EncodeToString(sess),
Path: "/",
Expires: now.Add(cookieTTL),
HttpOnly: true,
SameSite: http.SameSiteLaxMode,
}, nil
}
// realIP extracts the real IP address of the client from an HTTP request using
@ -436,8 +433,8 @@ func handleLogin(w http.ResponseWriter, r *http.Request) {
return
}
if blocker := Context.auth.blocker; blocker != nil {
if left := blocker.check(remoteAddr); left > 0 {
if rateLimiter := Context.auth.raleLimiter; rateLimiter != nil {
if left := rateLimiter.check(remoteAddr); left > 0 {
w.Header().Set("Retry-After", strconv.Itoa(int(left.Seconds())))
aghhttp.Error(r, w, http.StatusTooManyRequests, "auth: blocked for %s", left)
@ -445,10 +442,9 @@ func handleLogin(w http.ResponseWriter, r *http.Request) {
}
}
var cookie string
cookie, err = Context.auth.httpCookie(req, remoteAddr)
cookie, err := Context.auth.newCookie(req, remoteAddr)
if err != nil {
aghhttp.Error(r, w, http.StatusBadRequest, "crypto rand reader: %s", err)
aghhttp.Error(r, w, http.StatusForbidden, "%s", err)
return
}
@ -462,20 +458,11 @@ func handleLogin(w http.ResponseWriter, r *http.Request) {
log.Error("auth: unknown ip")
}
if len(cookie) == 0 {
log.Info("auth: failed to login user %q from ip %v", req.Name, ip)
time.Sleep(1 * time.Second)
http.Error(w, "invalid username or password", http.StatusBadRequest)
return
}
log.Info("auth: user %q successfully logged in from ip %v", req.Name, ip)
http.SetCookie(w, cookie)
h := w.Header()
h.Set("Set-Cookie", cookie)
h.Set("Cache-Control", "no-store, no-cache, must-revalidate, proxy-revalidate")
h.Set("Pragma", "no-cache")
h.Set("Expires", "0")
@ -484,17 +471,31 @@ func handleLogin(w http.ResponseWriter, r *http.Request) {
}
func handleLogout(w http.ResponseWriter, r *http.Request) {
cookie := r.Header.Get("Cookie")
sess := parseCookie(cookie)
respHdr := w.Header()
c, err := r.Cookie(sessionCookieName)
if err != nil {
// The only error that is returned from r.Cookie is [http.ErrNoCookie].
// The user is already logged out.
respHdr.Set("Location", "/login.html")
w.WriteHeader(http.StatusFound)
Context.auth.RemoveSession(sess)
return
}
w.Header().Set("Location", "/login.html")
Context.auth.RemoveSession(c.Value)
s := fmt.Sprintf("%s=; Path=/; HttpOnly; Expires=Thu, 01 Jan 1970 00:00:00 GMT",
sessionCookieName)
w.Header().Set("Set-Cookie", s)
c = &http.Cookie{
Name: sessionCookieName,
Value: "",
Path: "/",
Expires: time.Unix(0, 0),
HttpOnly: true,
SameSite: http.SameSiteLaxMode,
}
respHdr.Set("Location", "/login.html")
respHdr.Set("Set-Cookie", c.String())
w.WriteHeader(http.StatusFound)
}
@ -504,101 +505,108 @@ func RegisterAuthHandlers() {
httpRegister(http.MethodGet, "/control/logout", handleLogout)
}
func parseCookie(cookie string) string {
pairs := strings.Split(cookie, ";")
for _, pair := range pairs {
pair = strings.TrimSpace(pair)
kv := strings.SplitN(pair, "=", 2)
if len(kv) != 2 {
continue
}
if kv[0] == sessionCookieName {
return kv[1]
}
}
return ""
}
// optionalAuthThird return true if user should authenticate first.
func optionalAuthThird(w http.ResponseWriter, r *http.Request) (authFirst bool) {
authFirst = false
func optionalAuthThird(w http.ResponseWriter, r *http.Request) (mustAuth bool) {
if glProcessCookie(r) {
log.Debug("auth: authentication is handled by GL-Inet submodule")
return false
}
// redirect to login page if not authenticated
ok := false
isAuthenticated := false
cookie, err := r.Cookie(sessionCookieName)
if glProcessCookie(r) {
log.Debug("auth: authentication was handled by GL-Inet submodule")
ok = true
} else if err == nil {
r := Context.auth.checkSession(cookie.Value)
if r == checkSessionOK {
ok = true
} else if r < 0 {
log.Debug("auth: invalid cookie value: %s", cookie)
}
} else {
// there's no Cookie, check Basic authentication
user, pass, ok2 := r.BasicAuth()
if ok2 {
u := Context.auth.UserFind(user, pass)
if len(u.Name) != 0 {
ok = true
} else {
if err != nil {
// The only error that is returned from r.Cookie is [http.ErrNoCookie].
// Check Basic authentication.
user, pass, hasBasic := r.BasicAuth()
if hasBasic {
_, isAuthenticated = Context.auth.findUser(user, pass)
if !isAuthenticated {
log.Info("auth: invalid Basic Authorization value")
}
}
}
if !ok {
if r.URL.Path == "/" || r.URL.Path == "/index.html" {
if glProcessRedirect(w, r) {
log.Debug("auth: redirected to login page by GL-Inet submodule")
} else {
w.Header().Set("Location", "/login.html")
w.WriteHeader(http.StatusFound)
}
} else {
w.WriteHeader(http.StatusForbidden)
_, _ = w.Write([]byte("Forbidden"))
} else {
res := Context.auth.checkSession(cookie.Value)
isAuthenticated = res == checkSessionOK
if !isAuthenticated {
log.Debug("auth: invalid cookie value: %s", cookie)
}
authFirst = true
}
return authFirst
if isAuthenticated {
return false
}
if p := r.URL.Path; p == "/" || p == "/index.html" {
if glProcessRedirect(w, r) {
log.Debug("auth: redirected to login page by GL-Inet submodule")
} else {
log.Debug("auth: redirected to login page")
w.Header().Set("Location", "/login.html")
w.WriteHeader(http.StatusFound)
}
} else {
log.Debug("auth: responded with forbidden to %s %s", r.Method, p)
w.WriteHeader(http.StatusForbidden)
_, _ = w.Write([]byte("Forbidden"))
}
return true
}
func optionalAuth(handler func(http.ResponseWriter, *http.Request)) func(http.ResponseWriter, *http.Request) {
// TODO(a.garipov): Use [http.Handler] consistently everywhere throughout the
// project.
func optionalAuth(
h func(http.ResponseWriter, *http.Request),
) (wrapped func(http.ResponseWriter, *http.Request)) {
return func(w http.ResponseWriter, r *http.Request) {
if r.URL.Path == "/login.html" {
// redirect to dashboard if already authenticated
authRequired := Context.auth != nil && Context.auth.AuthRequired()
p := r.URL.Path
authRequired := Context.auth != nil && Context.auth.AuthRequired()
if p == "/login.html" {
cookie, err := r.Cookie(sessionCookieName)
if authRequired && err == nil {
r := Context.auth.checkSession(cookie.Value)
if r == checkSessionOK {
// Redirect to the dashboard if already authenticated.
res := Context.auth.checkSession(cookie.Value)
if res == checkSessionOK {
w.Header().Set("Location", "/")
w.WriteHeader(http.StatusFound)
return
} else if r == checkSessionNotFound {
log.Debug("auth: invalid cookie value: %s", cookie)
}
}
} else if strings.HasPrefix(r.URL.Path, "/assets/") ||
strings.HasPrefix(r.URL.Path, "/login.") {
// process as usual
// no additional auth requirements
} else if Context.auth != nil && Context.auth.AuthRequired() {
log.Debug("auth: invalid cookie value: %s", cookie)
}
} else if isPublicResource(p) {
// Process as usual, no additional auth requirements.
} else if authRequired {
if optionalAuthThird(w, r) {
return
}
}
handler(w, r)
h(w, r)
}
}
// isPublicResource returns true if p is a path to a public resource.
func isPublicResource(p string) (ok bool) {
isAsset, err := path.Match("/assets/*", p)
if err != nil {
// The only error that is returned from path.Match is
// [path.ErrBadPattern]. This is a programmer error.
panic(fmt.Errorf("bad asset pattern: %w", err))
}
isLogin, err := path.Match("/login.*", p)
if err != nil {
// Same as above.
panic(fmt.Errorf("bad login pattern: %w", err))
}
return isAsset || isLogin
}
type authHandler struct {
handler http.Handler
}
@ -612,7 +620,7 @@ func optionalAuthHandler(handler http.Handler) http.Handler {
}
// UserAdd - add new user
func (a *Auth) UserAdd(u *User, password string) {
func (a *Auth) UserAdd(u *webUser, password string) {
if len(password) == 0 {
return
}
@ -631,31 +639,35 @@ func (a *Auth) UserAdd(u *User, password string) {
log.Debug("auth: added user: %s", u.Name)
}
// UserFind - find a user
func (a *Auth) UserFind(login, password string) User {
// findUser returns a user if there is one.
func (a *Auth) findUser(login, password string) (u webUser, ok bool) {
a.lock.Lock()
defer a.lock.Unlock()
for _, u := range a.users {
for _, u = range a.users {
if u.Name == login &&
bcrypt.CompareHashAndPassword([]byte(u.PasswordHash), []byte(password)) == nil {
return u
return u, true
}
}
return User{}
return webUser{}, false
}
// getCurrentUser returns the current user. It returns an empty User if the
// user is not found.
func (a *Auth) getCurrentUser(r *http.Request) User {
func (a *Auth) getCurrentUser(r *http.Request) (u webUser) {
cookie, err := r.Cookie(sessionCookieName)
if err != nil {
// There's no Cookie, check Basic authentication.
user, pass, ok := r.BasicAuth()
if ok {
return Context.auth.UserFind(user, pass)
u, _ = Context.auth.findUser(user, pass)
return u
}
return User{}
return webUser{}
}
a.lock.Lock()
@ -663,20 +675,20 @@ func (a *Auth) getCurrentUser(r *http.Request) User {
s, ok := a.sessions[cookie.Value]
if !ok {
return User{}
return webUser{}
}
for _, u := range a.users {
for _, u = range a.users {
if u.Name == s.userName {
return u
}
}
return User{}
return webUser{}
}
// GetUsers - get users
func (a *Auth) GetUsers() []User {
func (a *Auth) GetUsers() []webUser {
a.lock.Lock()
users := a.users
a.lock.Unlock()

18
internal/home/auth_test.go
View File

@ -43,14 +43,14 @@ func TestAuth(t *testing.T) {
dir := t.TempDir()
fn := filepath.Join(dir, "sessions.db")
users := []User{{
users := []webUser{{
Name: "name",
PasswordHash: "$2y$05$..vyzAECIhJPfaQiOK17IukcQnqEgKJHy0iETyYqxn3YXJl8yZuo2",
}}
a := InitAuth(fn, nil, 60, nil)
s := session{}
user := User{Name: "name"}
user := webUser{Name: "name"}
a.UserAdd(&user, "password")
assert.Equal(t, checkSessionNotFound, a.checkSession("notfound"))
@ -84,7 +84,8 @@ func TestAuth(t *testing.T) {
a.storeSession(sess, &s)
a.Close()
u := a.UserFind("name", "password")
u, ok := a.findUser("name", "password")
assert.True(t, ok)
assert.NotEmpty(t, u.Name)
time.Sleep(3 * time.Second)
@ -118,7 +119,7 @@ func TestAuthHTTP(t *testing.T) {
dir := t.TempDir()
fn := filepath.Join(dir, "sessions.db")
users := []User{
users := []webUser{
{Name: "name", PasswordHash: "$2y$05$..vyzAECIhJPfaQiOK17IukcQnqEgKJHy0iETyYqxn3YXJl8yZuo2"},
}
Context.auth = InitAuth(fn, users, 60, nil)
@ -150,18 +151,19 @@ func TestAuthHTTP(t *testing.T) {
assert.True(t, handlerCalled)
// perform login
cookie, err := Context.auth.httpCookie(loginJSON{Name: "name", Password: "password"}, "")
cookie, err := Context.auth.newCookie(loginJSON{Name: "name", Password: "password"}, "")
require.NoError(t, err)
assert.NotEmpty(t, cookie)
require.NotNil(t, cookie)
// get /
handler2 = optionalAuth(handler)
w.hdr = make(http.Header)
r.Header.Set("Cookie", cookie)
r.Header.Set("Cookie", cookie.String())
r.URL = &url.URL{Path: "/"}
handlerCalled = false
handler2(&w, &r)
assert.True(t, handlerCalled)
r.Header.Del("Cookie")
// get / with basic auth
@ -177,7 +179,7 @@ func TestAuthHTTP(t *testing.T) {
// get login page with a valid cookie - we're redirected to /
handler2 = optionalAuth(handler)
w.hdr = make(http.Header)
r.Header.Set("Cookie", cookie)
r.Header.Set("Cookie", cookie.String())
r.URL = &url.URL{Path: loginURL}
handlerCalled = false
handler2(&w, &r)

14
internal/home/clientshttp.go
View File

@ -93,13 +93,7 @@ func (clients *clientsContainer) handleGetClients(w http.ResponseWriter, r *http
data.Tags = clientTags
w.Header().Set("Content-Type", "application/json")
e := json.NewEncoder(w).Encode(data)
if e != nil {
aghhttp.Error(r, w, http.StatusInternalServerError, "failed to encode to json: %v", e)
return
}
_ = aghhttp.WriteJSONResponse(w, r, data)
}
// Convert JSON object to Client object
@ -249,11 +243,7 @@ func (clients *clientsContainer) handleFindClient(w http.ResponseWriter, r *http
})
}
w.Header().Set("Content-Type", "application/json")
err := json.NewEncoder(w).Encode(data)
if err != nil {
aghhttp.Error(r, w, http.StatusInternalServerError, "Couldn't write response: %s", err)
}
_ = aghhttp.WriteJSONResponse(w, r, data)
}
// findRuntime looks up the IP in runtime and temporary storages, like

8
internal/home/config.go
View File

@ -85,10 +85,10 @@ type configuration struct {
// It's reset after config is parsed
fileData []byte
BindHost net.IP `yaml:"bind_host"` // BindHost is the IP address of the HTTP server to bind to
BindPort int `yaml:"bind_port"` // BindPort is the port the HTTP server
BetaBindPort int `yaml:"beta_bind_port"` // BetaBindPort is the port for new client
Users []User `yaml:"users"` // Users that can access HTTP server
BindHost net.IP `yaml:"bind_host"` // BindHost is the IP address of the HTTP server to bind to
BindPort int `yaml:"bind_port"` // BindPort is the port the HTTP server
BetaBindPort int `yaml:"beta_bind_port"` // BetaBindPort is the port for new client
Users []webUser `yaml:"users"` // Users that can access HTTP server
// AuthAttempts is the maximum number of failed login attempts a user
// can do before being blocked.
AuthAttempts uint `yaml:"auth_attempts"`

26
internal/home/control.go
View File

@ -146,13 +146,7 @@ func handleStatus(w http.ResponseWriter, r *http.Request) {
resp.IsDHCPAvailable = Context.dhcpServer != nil
}
w.Header().Set("Content-Type", "application/json")
err = json.NewEncoder(w).Encode(resp)
if err != nil {
aghhttp.Error(r, w, http.StatusInternalServerError, "Unable to write response json: %s", err)
return
}
_ = aghhttp.WriteJSONResponse(w, r, resp)
}
type profileJSON struct {
@ -162,13 +156,16 @@ type profileJSON struct {
func handleGetProfile(w http.ResponseWriter, r *http.Request) {
pj := profileJSON{}
u := Context.auth.getCurrentUser(r)
pj.Name = u.Name
data, err := json.Marshal(pj)
if err != nil {
aghhttp.Error(r, w, http.StatusInternalServerError, "json.Marshal: %s", err)
return
}
_, _ = w.Write(data)
}
@ -207,11 +204,24 @@ func ensure(method string, handler func(http.ResponseWriter, *http.Request)) fun
log.Debug("%s %v", r.Method, r.URL)
if r.Method != method {
http.Error(w, "This request must be "+method, http.StatusMethodNotAllowed)
aghhttp.Error(r, w, http.StatusMethodNotAllowed, "only %s is allowed", method)
return
}
if method == http.MethodPost || method == http.MethodPut || method == http.MethodDelete {
if r.Header.Get(aghhttp.HdrNameContentType) != aghhttp.HdrValApplicationJSON {
aghhttp.Error(
r,
w,
http.StatusUnsupportedMediaType,
"only %s is allowed",
aghhttp.HdrValApplicationJSON,
)
return
}
Context.controlLock.Lock()
defer Context.controlLock.Unlock()
}

38
internal/home/controlinstall.go
View File

@ -59,19 +59,7 @@ func (web *Web) handleInstallGetAddresses(w http.ResponseWriter, r *http.Request
data.Interfaces[iface.Name] = iface
}
w.Header().Set("Content-Type", "application/json")
err = json.NewEncoder(w).Encode(data)
if err != nil {
aghhttp.Error(
r,
w,
http.StatusInternalServerError,
"Unable to marshal default addresses to json: %s",
err,
)
return
}
_ = aghhttp.WriteJSONResponse(w, r, data)
}
type checkConfReqEnt struct {
@ -201,13 +189,7 @@ func (web *Web) handleInstallCheckConfig(w http.ResponseWriter, r *http.Request)
resp.StaticIP = handleStaticIP(req.DNS.IP, req.SetStaticIP)
}
w.Header().Set("Content-Type", "application/json")
err = json.NewEncoder(w).Encode(resp)
if err != nil {
aghhttp.Error(r, w, http.StatusInternalServerError, "encoding the response: %s", err)
return
}
_ = aghhttp.WriteJSONResponse(w, r, resp)
}
// handleStaticIP - handles static IP request
@ -424,7 +406,7 @@ func (web *Web) handleInstallConfigure(w http.ResponseWriter, r *http.Request) {
return
}
u := &User{
u := &webUser{
Name: req.Username,
}
Context.auth.UserAdd(u, req.Password)
@ -688,19 +670,7 @@ func (web *Web) handleInstallGetAddressesBeta(w http.ResponseWriter, r *http.Req
data.Interfaces = ifaces
w.Header().Set("Content-Type", "application/json")
err = json.NewEncoder(w).Encode(data)
if err != nil {
aghhttp.Error(
r,
w,
http.StatusInternalServerError,
"Unable to marshal default addresses to json: %s",
err,
)
return
}
_ = aghhttp.WriteJSONResponse(w, r, data)
}
// registerBetaInstallHandlers registers the install handlers for new client

7
internal/home/controlupdate.go
View File

@ -28,8 +28,6 @@ type temporaryError interface {
// Get the latest available version from the Internet
func handleGetVersionJSON(w http.ResponseWriter, r *http.Request) {
w.Header().Set("Content-Type", "application/json")
resp := &versionResponse{}
if Context.disableUpdate {
resp.Disabled = true
@ -71,10 +69,7 @@ func handleGetVersionJSON(w http.ResponseWriter, r *http.Request) {
return
}
err = json.NewEncoder(w).Encode(resp)
if err != nil {
aghhttp.Error(r, w, http.StatusInternalServerError, "writing body: %s", err)
}
_ = aghhttp.WriteJSONResponse(w, r, resp)
}
// requestVersionInfo sets the VersionInfo field of resp if it can reach the

8
internal/home/home.go
View File

@ -409,7 +409,7 @@ func run(args options, clientBuildFS fs.FS) {
configureLogger(args)
// Print the first message after logger is configured.
log.Println(version.Full())
log.Info(version.Full())
log.Debug("current working directory is %s", Context.workDir)
if args.runningAsService {
log.Info("AdGuard Home is running as a service")
@ -455,9 +455,9 @@ func run(args options, clientBuildFS fs.FS) {
sessFilename := filepath.Join(Context.getDataDir(), "sessions.db")
GLMode = args.glinetMode
var arl *authRateLimiter
var rateLimiter *authRateLimiter
if config.AuthAttempts > 0 && config.AuthBlockMin > 0 {
arl = newAuthRateLimiter(
rateLimiter = newAuthRateLimiter(
time.Duration(config.AuthBlockMin)*time.Minute,
config.AuthAttempts,
)
@ -469,7 +469,7 @@ func run(args options, clientBuildFS fs.FS) {
sessFilename,
config.Users,
config.WebSessionTTLHours*60*60,
arl,
rateLimiter,
)
if Context.auth == nil {
log.Fatalf("Couldn't initialize Auth module")

55
internal/home/i18n.go
View File

@ -1,10 +1,8 @@
package home
import (
"fmt"
"io"
"encoding/json"
"net/http"
"strings"
"github.com/AdguardTeam/AdGuardHome/internal/aghhttp"
"github.com/AdguardTeam/golibs/log"
@ -51,43 +49,35 @@ var allowedLanguages = stringutil.NewSet(
"zh-tw",
)
func handleI18nCurrentLanguage(w http.ResponseWriter, _ *http.Request) {
w.Header().Set("Content-Type", "text/plain")
log.Printf("config.Language is %s", config.Language)
_, err := fmt.Fprintf(w, "%s\n", config.Language)
if err != nil {
msg := fmt.Sprintf("Unable to write response json: %s", err)
log.Println(msg)
http.Error(w, msg, http.StatusInternalServerError)
// languageJSON is the JSON structure for language requests and responses.
type languageJSON struct {
Language string `json:"language"`
}
return
}
func handleI18nCurrentLanguage(w http.ResponseWriter, r *http.Request) {
log.Printf("home: language is %s", config.Language)
_ = aghhttp.WriteJSONResponse(w, r, &languageJSON{
Language: config.Language,
})
}
func handleI18nChangeLanguage(w http.ResponseWriter, r *http.Request) {
// This use of ReadAll is safe, because request's body is now limited.
body, err := io.ReadAll(r.Body)
if aghhttp.WriteTextPlainDeprecated(w, r) {
return
}
langReq := &languageJSON{}
err := json.NewDecoder(r.Body).Decode(langReq)
if err != nil {
msg := fmt.Sprintf("failed to read request body: %s", err)
log.Println(msg)
http.Error(w, msg, http.StatusBadRequest)
aghhttp.Error(r, w, http.StatusInternalServerError, "reading req: %s", err)
return
}
language := strings.TrimSpace(string(body))
if language == "" {
msg := "empty language specified"
log.Println(msg)
http.Error(w, msg, http.StatusBadRequest)
return
}
if !allowedLanguages.Has(language) {
msg := fmt.Sprintf("unknown language specified: %s", language)
log.Println(msg)
http.Error(w, msg, http.StatusBadRequest)
lang := langReq.Language
if !allowedLanguages.Has(lang) {
aghhttp.Error(r, w, http.StatusBadRequest, "unknown language: %q", lang)
return
}
@ -96,7 +86,8 @@ func handleI18nChangeLanguage(w http.ResponseWriter, r *http.Request) {
config.Lock()
defer config.Unlock()
config.Language = language
config.Language = lang
log.Printf("home: language is set to %s", lang)
}()
onConfigModified()

3
internal/home/service.go
View File

@ -176,7 +176,8 @@ func handleServiceControlAction(opts options, clientBuildFS fs.FS) {
chooseSystem()
action := opts.serviceControlAction
log.Printf("service: control action: %s", action)
log.Info(version.Full())
log.Info("service: control action: %s", action)
if action == "reload" {
sendSigReload()

13
internal/home/tls.go
View File

@ -680,8 +680,6 @@ func unmarshalTLS(r *http.Request) (tlsConfigSettingsExt, error) {
}
func marshalTLS(w http.ResponseWriter, r *http.Request, data tlsConfig) {
w.Header().Set("Content-Type", "application/json")
if data.CertificateChain != "" {
encoded := base64.StdEncoding.EncodeToString([]byte(data.CertificateChain))
data.CertificateChain = encoded
@ -692,16 +690,7 @@ func marshalTLS(w http.ResponseWriter, r *http.Request, data tlsConfig) {
data.PrivateKey = ""
}
err := json.NewEncoder(w).Encode(data)
if err != nil {
aghhttp.Error(
r,
w,
http.StatusInternalServerError,
"Failed to marshal json with TLS status: %s",
err,
)
}
_ = aghhttp.WriteJSONResponse(w, r, data)
}
// registerWebHandlers registers HTTP handlers for TLS configuration

4
internal/home/upgrade.go
View File

@ -278,11 +278,11 @@ func upgradeSchema4to5(diskConf yobj) error {
log.Fatalf("Can't use password \"%s\": bcrypt.GenerateFromPassword: %s", passStr, err)
return nil
}
u := User{
u := webUser{
Name: nameStr,
PasswordHash: string(hash),
}
users := []User{u}
users := []webUser{u}
diskConf["users"] = users
return nil
}

64
openapi/CHANGELOG.md
View File

@ -4,6 +4,64 @@
## v0.108.0: API changes
## v0.107.14: BREAKING API CHANGES
A Cross-Site Request Forgery (CSRF) vulnerability has been discovered. We have
implemented several measures to prevent such vulnerabilities in the future, but
some of these measures break backwards compatibility for the sake of better
protection.
All new formats for the request and response bodies are documented in
`openapi.yaml`.
### `POST /control/filtering/set_rules` And Other Plain-Text APIs
The following APIs, which previously accepted or returned `text/plain` data,
now accept or return data as JSON.
#### `POST /control/filtering/set_rules`
Previously, the API accepted a raw list of filters as a plain-text file. Now,
the filters must be presented in a JSON object with the following format:
```json
{
"rules":
[
"||example.com^",
"# comment",
"@@||www.example.com^"
]
}
```
#### `GET /control/i18n/current_language` And `POST /control/i18n/change_language`
Previously, these APIs accepted and returned the language code in plain text.
Now, they accept and return them in a JSON object with the following format:
```json
{
"language": "en"
}
```
#### `POST /control/dhcp/find_active_dhcp`
Previously, the API accepted the name of the network interface as a plain-text
string. Now, it must be contained within a JSON object with the following
format:
```json
{
"interface": "eth0"
}
```
## v0.107.12: API changes
### `GET /control/blocked_services/services`
@ -11,6 +69,8 @@
* The new `GET /control/blocked_services/services` HTTP API allows inspecting
all available services.
## v0.107.7: API changes
### The new optional field `"ecs"` in `QueryLogItem`
@ -24,6 +84,8 @@
`POST /install/configure` which means that the specified password does not
meet the strength requirements.
## v0.107.3: API changes
### The new field `"version"` in `AddressesInfo`
@ -31,6 +93,8 @@
* The new field `"version"` in `GET /install/get_addresses` is the version of
the AdGuard Home instance.
## v0.107.0: API changes
### The new field `"cached"` in `QueryLogItem`

54
openapi/openapi.yaml
View File

@ -413,6 +413,11 @@
- 'dhcp'
'operationId': 'checkActiveDhcp'
'summary': 'Searches for an active DHCP server on the network'
'requestBody':
'content':
'application/json':
'schema':
'$ref': '#/components/schemas/DhcpFindActiveReq'
'responses':
'200':
'description': 'OK.'
@ -667,24 +672,6 @@
- 'parental'
'operationId': 'parentalEnable'
'summary': 'Enable parental filtering'
'requestBody':
'content':
'text/plain':
'schema':
'type': 'string'
'enum':
- 'EARLY_CHILDHOOD'
- 'YOUNG'
- 'TEEN'
- 'MATURE'
'example': 'sensitivity=TEEN'
'description': |
Age sensitivity for parental filtering,
EARLY_CHILDHOOD is 3
YOUNG is 10
TEEN is 13
MATURE is 17
'required': true
'responses':
'200':
'description': 'OK.'
@ -958,10 +945,9 @@
Change current language. Argument must be an ISO 639-1 two-letter code.
'requestBody':
'content':
'text/plain':
'application/json':
'schema':
'type': 'string'
'example': 'en'
'$ref': '#/components/schemas/LanguageSettings'
'description': >
New language. It must be known to the server and must be an ISO 639-1
two-letter code.
@ -980,10 +966,9 @@
'200':
'description': 'OK.'
'content':
'text/plain':
'examples':
'response':
'value': 'en'
'application/json':
'schema':
'$ref': '#/components/schemas/LanguageSettings'
'/install/get_addresses_beta':
'get':
'tags':
@ -1777,6 +1762,16 @@
'additionalProperties':
'$ref': '#/components/schemas/NetInterface'
'DhcpFindActiveReq':
'description': >
Request for checking for other DHCP servers in the network.
'properties':
'interface':
'description': 'The name of the network interface'
'example': 'eth0'
'type': 'string'
'type': 'object'
'DhcpSearchResult':
'type': 'object'
'description': >
@ -2692,6 +2687,15 @@
'description': 'The error message, an opaque string.'
'type': 'string'
'type': 'object'
'LanguageSettings':
'description': 'Language settings object.'
'properties':
'language':
'description': 'The current language or the language to set.'
'type': 'string'
'required':
- 'language'
'type': 'object'
'securitySchemes':
'basicAuth':
'type': 'http'