// Cleans up the Value property, and removes rows that aren't visible to the current user
func filterViewResult(input walrus.ViewResult, user auth.User) (result walrus.ViewResult) {
checkChannels := false
var visibleChannels ch.TimedSet
if user != nil {
visibleChannels = user.InheritedChannels()
checkChannels = !visibleChannels.Contains("*")
}
result.TotalRows = input.TotalRows
result.Rows = make([]*walrus.ViewRow, 0, len(input.Rows)/2)
for _, row := range input.Rows {
value := row.Value.([]interface{})
// value[0] is the array of channels; value[1] is the actual value
if !checkChannels || channelsIntersect(visibleChannels, value[0].([]interface{})) {
// Add this row:
stripSyncProperty(row)
result.Rows = append(result.Rows, &walrus.ViewRow{
Key: row.Key,
Value: value[1],
ID: row.ID,
Doc: row.Doc,
})
}
}
return
}
// POST /_session creates a login session and sets its cookie
func (h *handler) handleSessionPOST() error {
// CORS not allowed for login #115 #762
originHeader := h.rq.Header["Origin"]
if len(originHeader) > 0 {
matched := ""
if h.server.config.CORS != nil {
matched = matchedOrigin(h.server.config.CORS.LoginOrigin, originHeader)
}
if matched == "" {
return base.HTTPErrorf(http.StatusBadRequest, "No CORS")
}
}
var params struct {
Name string `json:"name"`
Password string `json:"password"`
}
err := h.readJSONInto(¶ms)
if err != nil {
return err
}
var user auth.User
user, err = h.db.Authenticator().GetUser(params.Name)
if err != nil {
return err
}
if user != nil && !user.Authenticate(params.Password) {
user = nil
}
return h.makeSession(user)
}
func (h *handler) makeSession(user auth.User) error {
if user == nil {
return base.HTTPErrorf(http.StatusUnauthorized, "Invalid login")
}
h.user = user
auth := h.db.Authenticator()
session, err := auth.CreateSession(user.Name(), kDefaultSessionTTL)
if err != nil {
return err
}
cookie := auth.MakeSessionCookie(session)
cookie.Path = "/" + h.db.Name + "/"
http.SetCookie(h.response, cookie)
return h.respondWithSessionInfo()
}
// Creates a session with TTL and adds to the response. Does NOT return the session info response.
func (h *handler) makeSessionWithTTL(user auth.User, expiry time.Duration) (sessionID string, err error) {
if user == nil {
return "", base.HTTPErrorf(http.StatusUnauthorized, "Invalid login")
}
h.user = user
auth := h.db.Authenticator()
session, err := auth.CreateSession(user.Name(), expiry)
if err != nil {
return "", err
}
cookie := auth.MakeSessionCookie(session)
base.AddDbPathToCookie(h.rq, cookie)
http.SetCookie(h.response, cookie)
return session.ID, nil
}
func (listener *changeListener) NewWaiterWithChannels(chans base.Set, user auth.User) *changeWaiter {
waitKeys := make([]string, 0, 5)
for channel, _ := range chans {
waitKeys = append(waitKeys, channel)
}
var userKeys []string
if user != nil {
userKeys = []string{auth.UserKeyPrefix + user.Name()}
for role, _ := range user.RoleNames() {
userKeys = append(userKeys, auth.RoleKeyPrefix+role)
}
waitKeys = append(waitKeys, userKeys...)
}
waiter := listener.NewWaiter(waitKeys)
waiter.userKeys = userKeys
return waiter
}
// Cleans up the Value property, and removes rows that aren't visible to the current user
func filterViewResult(input sgbucket.ViewResult, user auth.User, applyChannelFiltering bool) (result sgbucket.ViewResult) {
hasStarChannel := false
var visibleChannels ch.TimedSet
if user != nil {
visibleChannels = user.InheritedChannels()
hasStarChannel = !visibleChannels.Contains("*")
if !applyChannelFiltering {
return // this is an error
}
}
result.TotalRows = input.TotalRows
result.Rows = make([]*sgbucket.ViewRow, 0, len(input.Rows)/2)
for _, row := range input.Rows {
if applyChannelFiltering {
value, ok := row.Value.([]interface{})
if ok {
// value[0] is the array of channels; value[1] is the actual value
if !hasStarChannel || channelsIntersect(visibleChannels, value[0].([]interface{})) {
// Add this row:
stripSyncProperty(row)
result.Rows = append(result.Rows, &sgbucket.ViewRow{
Key: row.Key,
Value: value[1],
ID: row.ID,
Doc: row.Doc,
})
}
}
} else {
// Add the raw row:
stripSyncProperty(row)
result.Rows = append(result.Rows, &sgbucket.ViewRow{
Key: row.Key,
Value: row.Value,
ID: row.ID,
Doc: row.Doc,
})
}
}
result.TotalRows = len(result.Rows)
return
}
// Formats session response similar to what is returned by CouchDB
func (h *handler) formatSessionResponse(user auth.User) db.Body {
var name *string
allChannels := channels.TimedSet{}
if user != nil {
userName := user.Name()
if userName != "" {
name = &userName
}
allChannels = user.Channels()
}
// Return a JSON struct similar to what CouchDB returns:
userCtx := db.Body{"name": name, "channels": allChannels}
handlers := []string{"default", "cookie"}
response := db.Body{"ok": true, "userCtx": userCtx, "authentication_handlers": handlers}
return response
}
// Recomputes the set of roles a User has been granted access to by sync() functions.
// This is part of the ChannelComputer interface defined by the Authenticator.
func (context *DatabaseContext) ComputeRolesForUser(user auth.User) (channels.TimedSet, error) {
var vres struct {
Rows []struct {
Value channels.TimedSet
}
}
opts := map[string]interface{}{"stale": false, "key": user.Name()}
if verr := context.Bucket.ViewCustom(DesignDocSyncGateway, ViewRoleAccess, opts, &vres); verr != nil {
return nil, verr
}
// Merge the TimedSets from the view result:
var result channels.TimedSet
for _, row := range vres.Rows {
if result == nil {
result = row.Value
} else {
result.Add(row.Value)
}
}
return result, nil
}
func (h *handler) getUserFromSessionRequestBody() (auth.User, error) {
var params struct {
Name string `json:"name"`
Password string `json:"password"`
}
err := h.readJSONInto(¶ms)
if err != nil {
return nil, err
}
var user auth.User
user, err = h.db.Authenticator().GetUser(params.Name)
if err != nil {
return nil, err
}
if user != nil && !user.Authenticate(params.Password) {
user = nil
}
return user, err
}
// POST /_session creates a login session and sets its cookie
func (h *handler) handleSessionPOST() error {
if len(h.rq.Header["Origin"]) > 0 {
// CORS not allowed for login #115
return base.HTTPErrorf(http.StatusBadRequest, "No CORS")
}
var params struct {
Name string `json:"name"`
Password string `json:"password"`
}
err := h.readJSONInto(¶ms)
if err != nil {
return err
}
var user auth.User
user, err = h.db.Authenticator().GetUser(params.Name)
if err != nil {
return err
}
if !user.Authenticate(params.Password) {
user = nil
}
return h.makeSession(user)
}
// Creates a userCtx object to be passed to the sync function
func makeUserCtx(user auth.User) map[string]interface{} {
if user == nil {
return nil
}
return map[string]interface{}{
"name": user.Name(),
"roles": user.RoleNames(),
"channels": user.InheritedChannels().AllChannels(),
}
}
// Updates or creates a principal from a PrincipalConfig structure.
func (dbc *DatabaseContext) UpdatePrincipal(newInfo PrincipalConfig, isUser bool, allowReplace bool) (replaced bool, err error) {
// Get the existing principal, or if this is a POST make sure there isn't one:
var princ auth.Principal
var user auth.User
authenticator := dbc.Authenticator()
if isUser {
isValid, reason := newInfo.IsPasswordValid(dbc.AllowEmptyPassword)
if !isValid {
err = base.HTTPErrorf(http.StatusBadRequest, reason)
return
}
user, err = authenticator.GetUser(*newInfo.Name)
princ = user
} else {
princ, err = authenticator.GetRole(*newInfo.Name)
}
if err != nil {
return
}
changed := false
replaced = (princ != nil)
if !replaced {
// If user/role didn't exist already, instantiate a new one:
if isUser {
user, err = authenticator.NewUser(*newInfo.Name, "", nil)
princ = user
} else {
princ, err = authenticator.NewRole(*newInfo.Name, nil)
}
if err != nil {
return
}
changed = true
} else if !allowReplace {
err = base.HTTPErrorf(http.StatusConflict, "Already exists")
return
}
updatedChannels := princ.ExplicitChannels()
if updatedChannels == nil {
updatedChannels = ch.TimedSet{}
}
if !updatedChannels.Equals(newInfo.ExplicitChannels) {
changed = true
}
var updatedRoles ch.TimedSet
// Then the user-specific fields like roles:
if isUser {
if newInfo.Email != user.Email() {
user.SetEmail(newInfo.Email)
changed = true
}
if newInfo.Password != nil {
user.SetPassword(*newInfo.Password)
changed = true
}
if newInfo.Disabled != user.Disabled() {
user.SetDisabled(newInfo.Disabled)
changed = true
}
updatedRoles = user.ExplicitRoles()
if updatedRoles == nil {
updatedRoles = ch.TimedSet{}
}
if !updatedRoles.Equals(base.SetFromArray(newInfo.ExplicitRoleNames)) {
changed = true
}
}
// And finally save the Principal:
if changed {
// Update the persistent sequence number of this principal (only allocate a sequence when needed - issue #673):
nextSeq := uint64(0)
if dbc.writeSequences() {
var err error
nextSeq, err = dbc.sequences.nextSequence()
if err != nil {
return replaced, err
}
princ.SetSequence(nextSeq)
}
// Now update the Principal object from the properties in the request, first the channels:
if updatedChannels.UpdateAtSequence(newInfo.ExplicitChannels, nextSeq) {
princ.SetExplicitChannels(updatedChannels)
}
if isUser {
if updatedRoles.UpdateAtSequence(base.SetFromArray(newInfo.ExplicitRoleNames), nextSeq) {
user.SetExplicitRoles(updatedRoles)
}
}
err = authenticator.Save(princ)
}
return
}