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-rw-r--r--routers/api/v1/activitypub/actor.go83
-rw-r--r--routers/api/v1/activitypub/person.go106
-rw-r--r--routers/api/v1/activitypub/repository.go80
-rw-r--r--routers/api/v1/activitypub/repository_test.go27
-rw-r--r--routers/api/v1/activitypub/reqsignature.go99
-rw-r--r--routers/api/v1/activitypub/response.go35
6 files changed, 430 insertions, 0 deletions
diff --git a/routers/api/v1/activitypub/actor.go b/routers/api/v1/activitypub/actor.go
new file mode 100644
index 0000000..4f128e7
--- /dev/null
+++ b/routers/api/v1/activitypub/actor.go
@@ -0,0 +1,83 @@
+// Copyright 2022 The Gitea Authors. All rights reserved.
+// Copyright 2024 The Forgejo Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package activitypub
+
+import (
+ "net/http"
+
+ user_model "code.gitea.io/gitea/models/user"
+ "code.gitea.io/gitea/modules/activitypub"
+ "code.gitea.io/gitea/modules/log"
+ "code.gitea.io/gitea/modules/setting"
+ "code.gitea.io/gitea/services/context"
+
+ ap "github.com/go-ap/activitypub"
+ "github.com/go-ap/jsonld"
+)
+
+// Actor function returns the instance's Actor
+func Actor(ctx *context.APIContext) {
+ // swagger:operation GET /activitypub/actor activitypub activitypubInstanceActor
+ // ---
+ // summary: Returns the instance's Actor
+ // produces:
+ // - application/json
+ // responses:
+ // "200":
+ // "$ref": "#/responses/ActivityPub"
+
+ link := user_model.APActorUserAPActorID()
+ actor := ap.ActorNew(ap.IRI(link), ap.ApplicationType)
+
+ actor.PreferredUsername = ap.NaturalLanguageValuesNew()
+ err := actor.PreferredUsername.Set("en", ap.Content(setting.Domain))
+ if err != nil {
+ ctx.ServerError("PreferredUsername.Set", err)
+ return
+ }
+
+ actor.URL = ap.IRI(setting.AppURL)
+
+ actor.Inbox = ap.IRI(link + "/inbox")
+ actor.Outbox = ap.IRI(link + "/outbox")
+
+ actor.PublicKey.ID = ap.IRI(link + "#main-key")
+ actor.PublicKey.Owner = ap.IRI(link)
+
+ publicKeyPem, err := activitypub.GetPublicKey(ctx, user_model.NewAPActorUser())
+ if err != nil {
+ ctx.ServerError("GetPublicKey", err)
+ return
+ }
+ actor.PublicKey.PublicKeyPem = publicKeyPem
+
+ binary, err := jsonld.WithContext(
+ jsonld.IRI(ap.ActivityBaseURI),
+ jsonld.IRI(ap.SecurityContextURI),
+ ).Marshal(actor)
+ if err != nil {
+ ctx.ServerError("MarshalJSON", err)
+ return
+ }
+ ctx.Resp.Header().Add("Content-Type", activitypub.ActivityStreamsContentType)
+ ctx.Resp.WriteHeader(http.StatusOK)
+ if _, err = ctx.Resp.Write(binary); err != nil {
+ log.Error("write to resp err: %v", err)
+ }
+}
+
+// ActorInbox function handles the incoming data for the instance Actor
+func ActorInbox(ctx *context.APIContext) {
+ // swagger:operation POST /activitypub/actor/inbox activitypub activitypubInstanceActorInbox
+ // ---
+ // summary: Send to the inbox
+ // produces:
+ // - application/json
+ // responses:
+ // "204":
+ // "$ref": "#/responses/empty"
+
+ ctx.Status(http.StatusNoContent)
+}
diff --git a/routers/api/v1/activitypub/person.go b/routers/api/v1/activitypub/person.go
new file mode 100644
index 0000000..995a148
--- /dev/null
+++ b/routers/api/v1/activitypub/person.go
@@ -0,0 +1,106 @@
+// Copyright 2022 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package activitypub
+
+import (
+ "fmt"
+ "net/http"
+ "strings"
+
+ "code.gitea.io/gitea/modules/activitypub"
+ "code.gitea.io/gitea/modules/log"
+ "code.gitea.io/gitea/modules/setting"
+ "code.gitea.io/gitea/services/context"
+
+ ap "github.com/go-ap/activitypub"
+ "github.com/go-ap/jsonld"
+)
+
+// Person function returns the Person actor for a user
+func Person(ctx *context.APIContext) {
+ // swagger:operation GET /activitypub/user-id/{user-id} activitypub activitypubPerson
+ // ---
+ // summary: Returns the Person actor for a user
+ // produces:
+ // - application/json
+ // parameters:
+ // - name: user-id
+ // in: path
+ // description: user ID of the user
+ // type: integer
+ // required: true
+ // responses:
+ // "200":
+ // "$ref": "#/responses/ActivityPub"
+
+ // TODO: the setting.AppURL during the test doesn't follow the definition: "It always has a '/' suffix"
+ link := fmt.Sprintf("%s/api/v1/activitypub/user-id/%d", strings.TrimSuffix(setting.AppURL, "/"), ctx.ContextUser.ID)
+ person := ap.PersonNew(ap.IRI(link))
+
+ person.Name = ap.NaturalLanguageValuesNew()
+ err := person.Name.Set("en", ap.Content(ctx.ContextUser.FullName))
+ if err != nil {
+ ctx.ServerError("Set Name", err)
+ return
+ }
+
+ person.PreferredUsername = ap.NaturalLanguageValuesNew()
+ err = person.PreferredUsername.Set("en", ap.Content(ctx.ContextUser.Name))
+ if err != nil {
+ ctx.ServerError("Set PreferredUsername", err)
+ return
+ }
+
+ person.URL = ap.IRI(ctx.ContextUser.HTMLURL())
+
+ person.Icon = ap.Image{
+ Type: ap.ImageType,
+ MediaType: "image/png",
+ URL: ap.IRI(ctx.ContextUser.AvatarLink(ctx)),
+ }
+
+ person.Inbox = ap.IRI(link + "/inbox")
+ person.Outbox = ap.IRI(link + "/outbox")
+
+ person.PublicKey.ID = ap.IRI(link + "#main-key")
+ person.PublicKey.Owner = ap.IRI(link)
+
+ publicKeyPem, err := activitypub.GetPublicKey(ctx, ctx.ContextUser)
+ if err != nil {
+ ctx.ServerError("GetPublicKey", err)
+ return
+ }
+ person.PublicKey.PublicKeyPem = publicKeyPem
+
+ binary, err := jsonld.WithContext(jsonld.IRI(ap.ActivityBaseURI), jsonld.IRI(ap.SecurityContextURI)).Marshal(person)
+ if err != nil {
+ ctx.ServerError("MarshalJSON", err)
+ return
+ }
+ ctx.Resp.Header().Add("Content-Type", activitypub.ActivityStreamsContentType)
+ ctx.Resp.WriteHeader(http.StatusOK)
+ if _, err = ctx.Resp.Write(binary); err != nil {
+ log.Error("write to resp err: %v", err)
+ }
+}
+
+// PersonInbox function handles the incoming data for a user inbox
+func PersonInbox(ctx *context.APIContext) {
+ // swagger:operation POST /activitypub/user-id/{user-id}/inbox activitypub activitypubPersonInbox
+ // ---
+ // summary: Send to the inbox
+ // produces:
+ // - application/json
+ // parameters:
+ // - name: user-id
+ // in: path
+ // description: user ID of the user
+ // type: integer
+ // required: true
+ // responses:
+ // "204":
+ // "$ref": "#/responses/empty"
+
+ ctx.Status(http.StatusNoContent)
+}
diff --git a/routers/api/v1/activitypub/repository.go b/routers/api/v1/activitypub/repository.go
new file mode 100644
index 0000000..bc6e790
--- /dev/null
+++ b/routers/api/v1/activitypub/repository.go
@@ -0,0 +1,80 @@
+// Copyright 2023, 2024 The Forgejo Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package activitypub
+
+import (
+ "fmt"
+ "net/http"
+ "strings"
+
+ "code.gitea.io/gitea/modules/forgefed"
+ "code.gitea.io/gitea/modules/log"
+ "code.gitea.io/gitea/modules/setting"
+ "code.gitea.io/gitea/modules/web"
+ "code.gitea.io/gitea/services/context"
+ "code.gitea.io/gitea/services/federation"
+
+ ap "github.com/go-ap/activitypub"
+)
+
+// Repository function returns the Repository actor for a repo
+func Repository(ctx *context.APIContext) {
+ // swagger:operation GET /activitypub/repository-id/{repository-id} activitypub activitypubRepository
+ // ---
+ // summary: Returns the Repository actor for a repo
+ // produces:
+ // - application/json
+ // parameters:
+ // - name: repository-id
+ // in: path
+ // description: repository ID of the repo
+ // type: integer
+ // required: true
+ // responses:
+ // "200":
+ // "$ref": "#/responses/ActivityPub"
+
+ link := fmt.Sprintf("%s/api/v1/activitypub/repository-id/%d", strings.TrimSuffix(setting.AppURL, "/"), ctx.Repo.Repository.ID)
+ repo := forgefed.RepositoryNew(ap.IRI(link))
+
+ repo.Name = ap.NaturalLanguageValuesNew()
+ err := repo.Name.Set("en", ap.Content(ctx.Repo.Repository.Name))
+ if err != nil {
+ ctx.Error(http.StatusInternalServerError, "Set Name", err)
+ return
+ }
+ response(ctx, repo)
+}
+
+// PersonInbox function handles the incoming data for a repository inbox
+func RepositoryInbox(ctx *context.APIContext) {
+ // swagger:operation POST /activitypub/repository-id/{repository-id}/inbox activitypub activitypubRepositoryInbox
+ // ---
+ // summary: Send to the inbox
+ // produces:
+ // - application/json
+ // parameters:
+ // - name: repository-id
+ // in: path
+ // description: repository ID of the repo
+ // type: integer
+ // required: true
+ // - name: body
+ // in: body
+ // schema:
+ // "$ref": "#/definitions/ForgeLike"
+ // responses:
+ // "204":
+ // "$ref": "#/responses/empty"
+
+ repository := ctx.Repo.Repository
+ log.Info("RepositoryInbox: repo: %v", repository)
+
+ form := web.GetForm(ctx)
+ httpStatus, title, err := federation.ProcessLikeActivity(ctx, form, repository.ID)
+ if err != nil {
+ ctx.Error(httpStatus, title, err)
+ }
+ ctx.Status(http.StatusNoContent)
+}
diff --git a/routers/api/v1/activitypub/repository_test.go b/routers/api/v1/activitypub/repository_test.go
new file mode 100644
index 0000000..acd588d
--- /dev/null
+++ b/routers/api/v1/activitypub/repository_test.go
@@ -0,0 +1,27 @@
+// Copyright 2024 The Forgejo Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package activitypub
+
+import (
+ "testing"
+
+ "code.gitea.io/gitea/models/user"
+)
+
+func Test_UserEmailValidate(t *testing.T) {
+ sut := "ab@cd.ef"
+ if err := user.ValidateEmail(sut); err != nil {
+ t.Errorf("sut should be valid, %v, %v", sut, err)
+ }
+
+ sut = "83ce13c8-af0b-4112-8327-55a54e54e664@code.cartoon-aa.xyz"
+ if err := user.ValidateEmail(sut); err != nil {
+ t.Errorf("sut should be valid, %v, %v", sut, err)
+ }
+
+ sut = "1"
+ if err := user.ValidateEmail(sut); err == nil {
+ t.Errorf("sut should not be valid, %v", sut)
+ }
+}
diff --git a/routers/api/v1/activitypub/reqsignature.go b/routers/api/v1/activitypub/reqsignature.go
new file mode 100644
index 0000000..6003f66
--- /dev/null
+++ b/routers/api/v1/activitypub/reqsignature.go
@@ -0,0 +1,99 @@
+// Copyright 2022 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package activitypub
+
+import (
+ "crypto"
+ "crypto/x509"
+ "encoding/pem"
+ "fmt"
+ "io"
+ "net/http"
+ "net/url"
+
+ "code.gitea.io/gitea/modules/activitypub"
+ "code.gitea.io/gitea/modules/httplib"
+ "code.gitea.io/gitea/modules/log"
+ "code.gitea.io/gitea/modules/setting"
+ gitea_context "code.gitea.io/gitea/services/context"
+
+ ap "github.com/go-ap/activitypub"
+ "github.com/go-fed/httpsig"
+)
+
+func getPublicKeyFromResponse(b []byte, keyID *url.URL) (p crypto.PublicKey, err error) {
+ person := ap.PersonNew(ap.IRI(keyID.String()))
+ err = person.UnmarshalJSON(b)
+ if err != nil {
+ return nil, fmt.Errorf("ActivityStreams type cannot be converted to one known to have publicKey property: %w", err)
+ }
+ pubKey := person.PublicKey
+ if pubKey.ID.String() != keyID.String() {
+ return nil, fmt.Errorf("cannot find publicKey with id: %s in %s", keyID, string(b))
+ }
+ pubKeyPem := pubKey.PublicKeyPem
+ block, _ := pem.Decode([]byte(pubKeyPem))
+ if block == nil || block.Type != "PUBLIC KEY" {
+ return nil, fmt.Errorf("could not decode publicKeyPem to PUBLIC KEY pem block type")
+ }
+ p, err = x509.ParsePKIXPublicKey(block.Bytes)
+ return p, err
+}
+
+func fetch(iri *url.URL) (b []byte, err error) {
+ req := httplib.NewRequest(iri.String(), http.MethodGet)
+ req.Header("Accept", activitypub.ActivityStreamsContentType)
+ req.Header("User-Agent", "Gitea/"+setting.AppVer)
+ resp, err := req.Response()
+ if err != nil {
+ return nil, err
+ }
+ defer resp.Body.Close()
+
+ if resp.StatusCode != http.StatusOK {
+ return nil, fmt.Errorf("url IRI fetch [%s] failed with status (%d): %s", iri, resp.StatusCode, resp.Status)
+ }
+ b, err = io.ReadAll(io.LimitReader(resp.Body, setting.Federation.MaxSize))
+ return b, err
+}
+
+func verifyHTTPSignatures(ctx *gitea_context.APIContext) (authenticated bool, err error) {
+ r := ctx.Req
+
+ // 1. Figure out what key we need to verify
+ v, err := httpsig.NewVerifier(r)
+ if err != nil {
+ return false, err
+ }
+ ID := v.KeyId()
+ idIRI, err := url.Parse(ID)
+ if err != nil {
+ return false, err
+ }
+ // 2. Fetch the public key of the other actor
+ b, err := fetch(idIRI)
+ if err != nil {
+ return false, err
+ }
+ pubKey, err := getPublicKeyFromResponse(b, idIRI)
+ if err != nil {
+ return false, err
+ }
+ // 3. Verify the other actor's key
+ algo := httpsig.Algorithm(setting.Federation.Algorithms[0])
+ authenticated = v.Verify(pubKey, algo) == nil
+ return authenticated, err
+}
+
+// ReqHTTPSignature function
+func ReqHTTPSignature() func(ctx *gitea_context.APIContext) {
+ return func(ctx *gitea_context.APIContext) {
+ if authenticated, err := verifyHTTPSignatures(ctx); err != nil {
+ log.Warn("verifyHttpSignatures failed: %v", err)
+ ctx.Error(http.StatusBadRequest, "reqSignature", "request signature verification failed")
+ } else if !authenticated {
+ ctx.Error(http.StatusForbidden, "reqSignature", "request signature verification failed")
+ }
+ }
+}
diff --git a/routers/api/v1/activitypub/response.go b/routers/api/v1/activitypub/response.go
new file mode 100644
index 0000000..42ef375
--- /dev/null
+++ b/routers/api/v1/activitypub/response.go
@@ -0,0 +1,35 @@
+// Copyright 2023 The Forgejo Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package activitypub
+
+import (
+ "net/http"
+
+ "code.gitea.io/gitea/modules/activitypub"
+ "code.gitea.io/gitea/modules/forgefed"
+ "code.gitea.io/gitea/modules/log"
+ "code.gitea.io/gitea/services/context"
+
+ ap "github.com/go-ap/activitypub"
+ "github.com/go-ap/jsonld"
+)
+
+// Respond with an ActivityStreams object
+func response(ctx *context.APIContext, v any) {
+ binary, err := jsonld.WithContext(
+ jsonld.IRI(ap.ActivityBaseURI),
+ jsonld.IRI(ap.SecurityContextURI),
+ jsonld.IRI(forgefed.ForgeFedNamespaceURI),
+ ).Marshal(v)
+ if err != nil {
+ ctx.ServerError("Marshal", err)
+ return
+ }
+
+ ctx.Resp.Header().Add("Content-Type", activitypub.ActivityStreamsContentType)
+ ctx.Resp.WriteHeader(http.StatusOK)
+ if _, err = ctx.Resp.Write(binary); err != nil {
+ log.Error("write to resp err: %v", err)
+ }
+}