mirror of
https://codeberg.org/forgejo/forgejo.git
synced 2024-11-14 18:24:14 +01:00
238 lines
7.5 KiB
Go
238 lines
7.5 KiB
Go
// Copyright 2024 The Forgejo Authors. All rights reserved.
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// SPDX-License-Identifier: MIT
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package forgefed
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import (
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"context"
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"fmt"
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"net/http"
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"net/url"
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"strings"
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"code.gitea.io/gitea/models/forgefed"
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"code.gitea.io/gitea/models/repo"
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"code.gitea.io/gitea/models/user"
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"code.gitea.io/gitea/modules/activitypub"
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"code.gitea.io/gitea/modules/auth/password"
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"code.gitea.io/gitea/modules/log"
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"code.gitea.io/gitea/modules/setting"
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"code.gitea.io/gitea/modules/validation"
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"github.com/google/uuid"
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)
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// ToDo: May need to change the name to reflect workings of function better
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// LikeActivity receives a ForgeLike activity and does the following:
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// Validation of the activity
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// Creation of a (remote) federationHost if not existing
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// Creation of a forgefed Person if not existing
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// Validation of incoming RepositoryID against Local RepositoryID
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// Star the repo if it wasn't already stared
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// Do some mitigation against out of order attacks
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func LikeActivity(ctx context.Context, form any, repositoryID int64) (int, string, error) {
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activity := form.(*forgefed.ForgeLike)
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if res, err := validation.IsValid(activity); !res {
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return http.StatusNotAcceptable, "Invalid activity", err
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}
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log.Info("Activity validated:%v", activity)
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// parse actorID (person)
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actorURI := activity.Actor.GetID().String()
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log.Info("actorURI was: %v", actorURI)
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federationHost, err := GetFederationHostForUri(ctx, actorURI)
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if err != nil {
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return http.StatusInternalServerError, "Wrong FederationHost", err
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}
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if !activity.IsNewer(federationHost.LatestActivity) {
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return http.StatusNotAcceptable, "Activity out of order.", fmt.Errorf("Activity already processed")
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}
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actorID, err := forgefed.NewPersonID(actorURI, string(federationHost.NodeInfo.Source))
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if err != nil {
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return http.StatusNotAcceptable, "Invalid PersonID", err
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}
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log.Info("Actor accepted:%v", actorID)
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// parse objectID (repository)
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objectID, err := forgefed.NewRepositoryID(activity.Object.GetID().String(), string(forgefed.ForgejoSourceType))
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if err != nil {
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return http.StatusNotAcceptable, "Invalid objectId", err
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}
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if objectID.ID != fmt.Sprint(repositoryID) {
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return http.StatusNotAcceptable, "Invalid objectId", err
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}
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log.Info("Object accepted:%v", objectID)
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// Check if user already exists
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user, _, err := user.FindFederatedUser(ctx, actorID.ID, federationHost.ID)
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if err != nil {
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return http.StatusInternalServerError, "Searching for user failed", err
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}
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if user != nil {
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log.Info("Found local federatedUser: %v", user)
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} else {
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user, _, err = CreateUserFromAP(ctx, actorID, federationHost.ID)
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if err != nil {
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return http.StatusInternalServerError, "Error creating federatedUser", err
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}
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log.Info("Created federatedUser from ap: %v", user)
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}
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log.Info("Got user:%v", user.Name)
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// execute the activity if the repo was not stared already
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alreadyStared := repo.IsStaring(ctx, user.ID, repositoryID)
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if !alreadyStared {
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err = repo.StarRepo(ctx, user.ID, repositoryID, true)
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if err != nil {
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return http.StatusNotAcceptable, "Error staring", err
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}
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}
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federationHost.LatestActivity = activity.StartTime
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err = forgefed.UpdateFederationHost(ctx, federationHost)
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if err != nil {
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return http.StatusNotAcceptable, "Error updating federatedHost", err
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}
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return 0, "", nil
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}
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func CreateFederationHostFromAP(ctx context.Context, actorID forgefed.ActorID) (*forgefed.FederationHost, error) {
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actionsUser := user.NewActionsUser()
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client, err := activitypub.NewClient(ctx, actionsUser, "no idea where to get key material.")
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if err != nil {
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return nil, err
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}
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body, err := client.GetBody(actorID.AsWellKnownNodeInfoURI())
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if err != nil {
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return nil, err
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}
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nodeInfoWellKnown, err := forgefed.NewNodeInfoWellKnown(body)
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if err != nil {
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return nil, err
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}
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body, err = client.GetBody(nodeInfoWellKnown.Href)
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if err != nil {
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return nil, err
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}
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nodeInfo, err := forgefed.NewNodeInfo(body)
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if err != nil {
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return nil, err
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}
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result, err := forgefed.NewFederationHost(nodeInfo, actorID.Host)
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if err != nil {
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return nil, err
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}
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err = forgefed.CreateFederationHost(ctx, &result)
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if err != nil {
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return nil, err
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}
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return &result, nil
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}
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func GetFederationHostForUri(ctx context.Context, actorURI string) (*forgefed.FederationHost, error) {
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// parse actorID (person)
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log.Info("Input was: %v", actorURI)
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rawActorID, err := forgefed.NewActorID(actorURI)
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if err != nil {
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return nil, err
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}
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federationHost, err := forgefed.FindFederationHostByFqdn(ctx, rawActorID.Host)
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if err != nil {
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return nil, err
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}
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if federationHost == nil {
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result, err := CreateFederationHostFromAP(ctx, rawActorID)
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if err != nil {
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return nil, err
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}
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federationHost = result
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}
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return federationHost, nil
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}
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func CreateUserFromAP(ctx context.Context, personID forgefed.PersonID, federationHostID int64) (*user.User, *user.FederatedUser, error) {
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// ToDo: Do we get a publicKeyId from server, repo or owner or repo?
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actionsUser := user.NewActionsUser()
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client, err := activitypub.NewClient(ctx, actionsUser, "no idea where to get key material.")
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if err != nil {
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return nil, nil, err
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}
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body, err := client.GetBody(personID.AsURI())
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if err != nil {
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return nil, nil, err
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}
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person := forgefed.ForgePerson{}
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err = person.UnmarshalJSON(body)
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if err != nil {
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return nil, nil, err
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}
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if res, err := validation.IsValid(person); !res {
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return nil, nil, err
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}
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log.Info("Fetched valid person:%q", person)
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localFqdn, err := url.ParseRequestURI(setting.AppURL)
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if err != nil {
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return nil, nil, err
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}
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email := fmt.Sprintf("f%v@%v", uuid.New().String(), localFqdn.Hostname())
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loginName := personID.AsLoginName()
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name := fmt.Sprintf("%v%v", person.PreferredUsername.String(), personID.HostSuffix())
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fullName := person.Name.String()
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if len(person.Name) == 0 {
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fullName = name
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}
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password, err := password.Generate(32)
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if err != nil {
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return nil, nil, err
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}
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newUser := user.User{
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LowerName: strings.ToLower(person.PreferredUsername.String()),
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Name: name,
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FullName: fullName,
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Email: email,
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EmailNotificationsPreference: "disabled",
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Passwd: password,
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MustChangePassword: false,
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LoginName: loginName,
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Type: user.UserTypeRemoteUser,
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IsAdmin: false,
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}
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federatedUser := user.FederatedUser{
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ExternalID: personID.ID,
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FederationHostID: federationHostID,
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}
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err = user.CreateFederatedUser(ctx, &newUser, &federatedUser)
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if err != nil {
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return nil, nil, err
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}
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log.Info("Created federatedUser:%q", federatedUser)
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return &newUser, &federatedUser, nil
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}
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// Create or update a list of FederatedRepo structs
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func StoreFederatedRepoList(ctx context.Context, localRepoId int64, federatedRepoList []string) (int, string, error) {
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federatedRepos := make([]*repo.FederatedRepo, 0, len(federatedRepoList))
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for _, uri := range federatedRepoList {
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federationHost, err := GetFederationHostForUri(ctx, uri)
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if err != nil {
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return http.StatusInternalServerError, "Wrong FederationHost", err
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}
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federatedRepoID, err := forgefed.NewRepositoryID(uri, string(federationHost.NodeInfo.Source))
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if err != nil {
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return http.StatusNotAcceptable, "Invalid federated repo", err
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}
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federatedRepo, err := repo.NewFederatedRepo(localRepoId, federatedRepoID.ID, federationHost.ID, uri)
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if err != nil {
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return http.StatusNotAcceptable, "Invalid federated repo", err
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}
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federatedRepos = append(federatedRepos, &federatedRepo)
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}
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repo.StoreFederatedRepos(ctx, localRepoId, federatedRepos)
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return 0, "", nil
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}
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