Icycoide/RSCC-Forge
1
0
Fork 0
forked from kevadesu/forgejo
Code Pull requests Activity

Prevent double-login for Git HTTP and LFS and simplify login (#15303)

Browse source 
* Prevent double-login for Git HTTP and LFS and simplify login

There are a number of inconsistencies with our current methods for
logging in for git and lfs. The first is that there is a double login
process. This is particularly evident in 1.13 where there are no less
than 4 hash checks for basic authentication due to the previous
IsPasswordSet behaviour.

This duplicated code had individual inconsistencies that were not
helpful and caused confusion.

This PR does the following:

* Remove the specific login code from the git and lfs handlers except
for the lfs special bearer token
* Simplify the meaning of DisableBasicAuthentication to allow Token and
Oauth2 sign-in.
* The removal of the specific code from git and lfs means that these
both now have the same login semantics and can - if not
DisableBasicAuthentication - login from external services. Further it
allows Oauth2 token authentication as per our standard mechanisms.
* The change in the recovery handler prevents the service from
re-attempting to login - primarily because this could easily cause a
further panic and it is wasteful.

* add test

Signed-off-by: Andrew Thornton <art27@cantab.net>
Co-authored-by: Andrew Thornton <art27@cantab.net>
This commit is contained in:
zeripath 2021-05-15 16:32:09 +01:00 • committed by GitHub
parent ba526ceffe
commit 17c5c654a5
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
10 changed files with 292 additions and 221 deletions
Download patch file Download diff file Expand all files Collapse all files

129
routers/repo/http.go
View file

@ -22,15 +22,12 @@ import (
"time"
"code.gitea.io/gitea/models"
"code.gitea.io/gitea/modules/auth/sso"
"code.gitea.io/gitea/modules/base"
"code.gitea.io/gitea/modules/context"
"code.gitea.io/gitea/modules/git"
"code.gitea.io/gitea/modules/log"
"code.gitea.io/gitea/modules/process"
"code.gitea.io/gitea/modules/setting"
"code.gitea.io/gitea/modules/structs"
"code.gitea.io/gitea/modules/timeutil"
"code.gitea.io/gitea/modules/util"
repo_service "code.gitea.io/gitea/services/repository"
)
@ -153,11 +150,8 @@ func httpBase(ctx *context.Context) (h *serviceHandler) {
// Only public pull don't need auth.
isPublicPull := repoExist && !repo.IsPrivate && isPull
var (
askAuth = !isPublicPull || setting.Service.RequireSignInView
authUser *models.User
authUsername string
authPasswd string
environ []string
askAuth = !isPublicPull || setting.Service.RequireSignInView
environ []string
)
// don't allow anonymous pulls if organization is not public
@ -172,108 +166,33 @@ func httpBase(ctx *context.Context) (h *serviceHandler) {
// check access
if askAuth {
authUsername = ctx.Req.Header.Get(setting.ReverseProxyAuthUser)
if setting.Service.EnableReverseProxyAuth && len(authUsername) > 0 {
authUser, err = models.GetUserByName(authUsername)
if err != nil {
ctx.HandleText(401, "reverse proxy login error, got error while running GetUserByName")
return
}
} else {
authHead := ctx.Req.Header.Get("Authorization")
if len(authHead) == 0 {
ctx.Resp.Header().Set("WWW-Authenticate", "Basic realm=\".\"")
ctx.Error(http.StatusUnauthorized)
return
}
// rely on the results of Contexter
if !ctx.IsSigned {
// TODO: support digit auth - which would be Authorization header with digit
ctx.Resp.Header().Set("WWW-Authenticate", "Basic realm=\".\"")
ctx.Error(http.StatusUnauthorized)
return
}
auths := strings.Fields(authHead)
// currently check basic auth
// TODO: support digit auth
// FIXME: middlewares/context.go did basic auth check already,
// maybe could use that one.
if len(auths) != 2 || auths[0] != "Basic" {
ctx.HandleText(http.StatusUnauthorized, "no basic auth and digit auth")
return
}
authUsername, authPasswd, err = base.BasicAuthDecode(auths[1])
if err != nil {
ctx.HandleText(http.StatusUnauthorized, "no basic auth and digit auth")
return
}
// Check if username or password is a token
isUsernameToken := len(authPasswd) == 0 || authPasswd == "x-oauth-basic"
// Assume username is token
authToken := authUsername
if !isUsernameToken {
// Assume password is token
authToken = authPasswd
}
uid := sso.CheckOAuthAccessToken(authToken)
if uid != 0 {
ctx.Data["IsApiToken"] = true
authUser, err = models.GetUserByID(uid)
if err != nil {
ctx.ServerError("GetUserByID", err)
return
}
}
// Assume password is a token.
token, err := models.GetAccessTokenBySHA(authToken)
if ctx.IsBasicAuth {
_, err = models.GetTwoFactorByUID(ctx.User.ID)
if err == nil {
authUser, err = models.GetUserByID(token.UID)
if err != nil {
ctx.ServerError("GetUserByID", err)
return
}
token.UpdatedUnix = timeutil.TimeStampNow()
if err = models.UpdateAccessToken(token); err != nil {
ctx.ServerError("UpdateAccessToken", err)
}
} else if !models.IsErrAccessTokenNotExist(err) && !models.IsErrAccessTokenEmpty(err) {
log.Error("GetAccessTokenBySha: %v", err)
}
if authUser == nil {
// Check username and password
authUser, err = models.UserSignIn(authUsername, authPasswd)
if err != nil {
if models.IsErrUserProhibitLogin(err) {
ctx.HandleText(http.StatusForbidden, "User is not permitted to login")
return
} else if !models.IsErrUserNotExist(err) {
ctx.ServerError("UserSignIn error: %v", err)
return
}
}
if authUser == nil {
ctx.HandleText(http.StatusUnauthorized, fmt.Sprintf("invalid credentials from %s", ctx.RemoteAddr()))
return
}
_, err = models.GetTwoFactorByUID(authUser.ID)
if err == nil {
// TODO: This response should be changed to "invalid credentials" for security reasons once the expectation behind it (creating an app token to authenticate) is properly documented
ctx.HandleText(http.StatusUnauthorized, "Users with two-factor authentication enabled cannot perform HTTP/HTTPS operations via plain username and password. Please create and use a personal access token on the user settings page")
return
} else if !models.IsErrTwoFactorNotEnrolled(err) {
ctx.ServerError("IsErrTwoFactorNotEnrolled", err)
return
}
// TODO: This response should be changed to "invalid credentials" for security reasons once the expectation behind it (creating an app token to authenticate) is properly documented
ctx.HandleText(http.StatusUnauthorized, "Users with two-factor authentication enabled cannot perform HTTP/HTTPS operations via plain username and password. Please create and use a personal access token on the user settings page")
return
} else if !models.IsErrTwoFactorNotEnrolled(err) {
ctx.ServerError("IsErrTwoFactorNotEnrolled", err)
return
}
}
if !authUser.IsActive || authUser.ProhibitLogin {
if !ctx.User.IsActive || ctx.User.ProhibitLogin {
ctx.HandleText(http.StatusForbidden, "Your account is disabled.")
return
}
if repoExist {
perm, err := models.GetUserRepoPermission(repo, authUser)
perm, err := models.GetUserRepoPermission(repo, ctx.User)
if err != nil {
ctx.ServerError("GetUserRepoPermission", err)
return
@ -293,14 +212,14 @@ func httpBase(ctx *context.Context) (h *serviceHandler) {
environ = []string{
models.EnvRepoUsername + "=" + username,
models.EnvRepoName + "=" + reponame,
models.EnvPusherName + "=" + authUser.Name,
models.EnvPusherID + fmt.Sprintf("=%d", authUser.ID),
models.EnvPusherName + "=" + ctx.User.Name,
models.EnvPusherID + fmt.Sprintf("=%d", ctx.User.ID),
models.EnvIsDeployKey + "=false",
models.EnvAppURL + "=" + setting.AppURL,
}
if !authUser.KeepEmailPrivate {
environ = append(environ, models.EnvPusherEmail+"="+authUser.Email)
if !ctx.User.KeepEmailPrivate {
environ = append(environ, models.EnvPusherEmail+"="+ctx.User.Email)
}
if isWiki {
@ -336,7 +255,7 @@ func httpBase(ctx *context.Context) (h *serviceHandler) {
return
}
repo, err = repo_service.PushCreateRepo(authUser, owner, reponame)
repo, err = repo_service.PushCreateRepo(ctx.User, owner, reponame)
if err != nil {
log.Error("pushCreateRepo: %v", err)
ctx.Status(http.StatusNotFound)