feat: action v2 signing (#8779)

# Which Problems Are Solved

The action v2 messages were didn't contain anything providing security
for the sent content.

# How the Problems Are Solved

Each Target now has a SigningKey, which can also be newly generated
through the API and returned at creation and through the Get-Endpoints.
There is now a HTTP header "Zitadel-Signature", which is generated with
the SigningKey and Payload, and also contains a timestamp to check with
a tolerance if the message took to long to sent.

# Additional Changes

The functionality to create and check the signature is provided in the
pkg/actions package, and can be reused in the SDK.

# Additional Context

Closes #7924

---------

Co-authored-by: Livio Spring <livio.a@gmail.com>

internal/api/grpc/resources/action/v3alpha/integration_test/query_test.go

@@ -62,6 +62,7 @@ func TestServer_GetTarget(t *testing.T) {
 					request.Id = resp.GetDetails().GetId()
 					response.Target.Config.Name = name
 					response.Target.Details = resp.GetDetails()
+					response.Target.SigningKey = resp.GetSigningKey()
 					return nil
 				},
 				req: &action.GetTargetRequest{},
@@ -92,6 +93,7 @@ func TestServer_GetTarget(t *testing.T) {
 					request.Id = resp.GetDetails().GetId()
 					response.Target.Config.Name = name
 					response.Target.Details = resp.GetDetails()
+					response.Target.SigningKey = resp.GetSigningKey()
 					return nil
 				},
 				req: &action.GetTargetRequest{},
@@ -122,6 +124,7 @@ func TestServer_GetTarget(t *testing.T) {
 					request.Id = resp.GetDetails().GetId()
 					response.Target.Config.Name = name
 					response.Target.Details = resp.GetDetails()
+					response.Target.SigningKey = resp.GetSigningKey()
 					return nil
 				},
 				req: &action.GetTargetRequest{},
@@ -154,6 +157,7 @@ func TestServer_GetTarget(t *testing.T) {
 					request.Id = resp.GetDetails().GetId()
 					response.Target.Config.Name = name
 					response.Target.Details = resp.GetDetails()
+					response.Target.SigningKey = resp.GetSigningKey()
 					return nil
 				},
 				req: &action.GetTargetRequest{},
@@ -186,6 +190,7 @@ func TestServer_GetTarget(t *testing.T) {
 					request.Id = resp.GetDetails().GetId()
 					response.Target.Config.Name = name
 					response.Target.Details = resp.GetDetails()
+					response.Target.SigningKey = resp.GetSigningKey()
 					return nil
 				},
 				req: &action.GetTargetRequest{},
@@ -230,6 +235,7 @@ func TestServer_GetTarget(t *testing.T) {
 				gotTarget := got.GetTarget()
 				integration.AssertResourceDetails(ttt, wantTarget.GetDetails(), gotTarget.GetDetails())
 				assert.EqualExportedValues(ttt, wantTarget.GetConfig(), gotTarget.GetConfig())
+				assert.Equal(ttt, wantTarget.GetSigningKey(), gotTarget.GetSigningKey())
 			}, retryDuration, tick, "timeout waiting for expected target result")
 		})
 	}
@@ -492,6 +498,7 @@ func TestServer_ListTargets(t *testing.T) {
 					for i := range tt.want.Result {
 						integration.AssertResourceDetails(ttt, tt.want.Result[i].GetDetails(), got.Result[i].GetDetails())
 						assert.EqualExportedValues(ttt, tt.want.Result[i].GetConfig(), got.Result[i].GetConfig())
+						assert.NotEmpty(ttt, got.Result[i].GetSigningKey())
 					}
 				}
 				integration.AssertResourceListDetails(ttt, tt.want, got)

internal/api/grpc/resources/action/v3alpha/integration_test/target_test.go

@@ -9,6 +9,7 @@ import (
 
 	"github.com/brianvoe/gofakeit/v6"
 	"github.com/muhlemmer/gu"
+	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
 	"google.golang.org/protobuf/types/known/durationpb"
 	"google.golang.org/protobuf/types/known/timestamppb"
@@ -200,11 +201,12 @@ func TestServer_CreateTarget(t *testing.T) {
 		t.Run(tt.name, func(t *testing.T) {
 			got, err := instance.Client.ActionV3Alpha.CreateTarget(tt.ctx, &action.CreateTargetRequest{Target: tt.req})
 			if tt.wantErr {
-				require.Error(t, err)
-				return
+				assert.Error(t, err)
+			} else {
+				assert.NoError(t, err)
+				integration.AssertResourceDetails(t, tt.want, got.Details)
+				assert.NotEmpty(t, got.GetSigningKey())
 			}
-			require.NoError(t, err)
-			integration.AssertResourceDetails(t, tt.want, got.Details)
 		})
 	}
 }
@@ -217,11 +219,15 @@ func TestServer_PatchTarget(t *testing.T) {
 		ctx context.Context
 		req *action.PatchTargetRequest
 	}
+	type want struct {
+		details    *resource_object.Details
+		signingKey bool
+	}
 	tests := []struct {
 		name    string
 		prepare func(request *action.PatchTargetRequest) error
 		args    args
-		want    *resource_object.Details
+		want    want
 		wantErr bool
 	}{
 		{
@@ -272,14 +278,42 @@ func TestServer_PatchTarget(t *testing.T) {
 					},
 				},
 			},
-			want: &resource_object.Details{
-				Changed: timestamppb.Now(),
-				Owner: &object.Owner{
-					Type: object.OwnerType_OWNER_TYPE_INSTANCE,
-					Id:   instance.ID(),
+			want: want{
+				details: &resource_object.Details{
+					Changed: timestamppb.Now(),
+					Owner: &object.Owner{
+						Type: object.OwnerType_OWNER_TYPE_INSTANCE,
+						Id:   instance.ID(),
+					},
 				},
 			},
 		},
+		{
+			name: "regenerate signingkey, ok",
+			prepare: func(request *action.PatchTargetRequest) error {
+				targetID := instance.CreateTarget(isolatedIAMOwnerCTX, t, "", "https://example.com", domain.TargetTypeWebhook, false).GetDetails().GetId()
+				request.Id = targetID
+				return nil
+			},
+			args: args{
+				ctx: isolatedIAMOwnerCTX,
+				req: &action.PatchTargetRequest{
+					Target: &action.PatchTarget{
+						ExpirationSigningKey: durationpb.New(0 * time.Second),
+					},
+				},
+			},
+			want: want{
+				details: &resource_object.Details{
+					Changed: timestamppb.Now(),
+					Owner: &object.Owner{
+						Type: object.OwnerType_OWNER_TYPE_INSTANCE,
+						Id:   instance.ID(),
+					},
+				},
+				signingKey: true,
+			},
+		},
 		{
 			name: "change type, ok",
 			prepare: func(request *action.PatchTargetRequest) error {
@@ -299,11 +333,13 @@ func TestServer_PatchTarget(t *testing.T) {
 					},
 				},
 			},
-			want: &resource_object.Details{
-				Changed: timestamppb.Now(),
-				Owner: &object.Owner{
-					Type: object.OwnerType_OWNER_TYPE_INSTANCE,
-					Id:   instance.ID(),
+			want: want{
+				details: &resource_object.Details{
+					Changed: timestamppb.Now(),
+					Owner: &object.Owner{
+						Type: object.OwnerType_OWNER_TYPE_INSTANCE,
+						Id:   instance.ID(),
+					},
 				},
 			},
 		},
@@ -322,11 +358,13 @@ func TestServer_PatchTarget(t *testing.T) {
 					},
 				},
 			},
-			want: &resource_object.Details{
-				Changed: timestamppb.Now(),
-				Owner: &object.Owner{
-					Type: object.OwnerType_OWNER_TYPE_INSTANCE,
-					Id:   instance.ID(),
+			want: want{
+				details: &resource_object.Details{
+					Changed: timestamppb.Now(),
+					Owner: &object.Owner{
+						Type: object.OwnerType_OWNER_TYPE_INSTANCE,
+						Id:   instance.ID(),
+					},
 				},
 			},
 		},
@@ -345,11 +383,13 @@ func TestServer_PatchTarget(t *testing.T) {
 					},
 				},
 			},
-			want: &resource_object.Details{
-				Changed: timestamppb.Now(),
-				Owner: &object.Owner{
-					Type: object.OwnerType_OWNER_TYPE_INSTANCE,
-					Id:   instance.ID(),
+			want: want{
+				details: &resource_object.Details{
+					Changed: timestamppb.Now(),
+					Owner: &object.Owner{
+						Type: object.OwnerType_OWNER_TYPE_INSTANCE,
+						Id:   instance.ID(),
+					},
 				},
 			},
 		},
@@ -370,11 +410,13 @@ func TestServer_PatchTarget(t *testing.T) {
 					},
 				},
 			},
-			want: &resource_object.Details{
-				Changed: timestamppb.Now(),
-				Owner: &object.Owner{
-					Type: object.OwnerType_OWNER_TYPE_INSTANCE,
-					Id:   instance.ID(),
+			want: want{
+				details: &resource_object.Details{
+					Changed: timestamppb.Now(),
+					Owner: &object.Owner{
+						Type: object.OwnerType_OWNER_TYPE_INSTANCE,
+						Id:   instance.ID(),
+					},
 				},
 			},
 		},
@@ -387,11 +429,14 @@ func TestServer_PatchTarget(t *testing.T) {
 			instance.Client.ActionV3Alpha.PatchTarget(tt.args.ctx, tt.args.req)
 			got, err := instance.Client.ActionV3Alpha.PatchTarget(tt.args.ctx, tt.args.req)
 			if tt.wantErr {
-				require.Error(t, err)
-				return
+				assert.Error(t, err)
+			} else {
+				assert.NoError(t, err)
+				integration.AssertResourceDetails(t, tt.want.details, got.Details)
+				if tt.want.signingKey {
+					assert.NotEmpty(t, got.SigningKey)
+				}
 			}
-			require.NoError(t, err)
-			integration.AssertResourceDetails(t, tt.want, got.Details)
 		})
 	}
 }
@@ -443,11 +488,12 @@ func TestServer_DeleteTarget(t *testing.T) {
 		t.Run(tt.name, func(t *testing.T) {
 			got, err := instance.Client.ActionV3Alpha.DeleteTarget(tt.ctx, tt.req)
 			if tt.wantErr {
-				require.Error(t, err)
+				assert.Error(t, err)
 				return
+			} else {
+				assert.NoError(t, err)
+				integration.AssertResourceDetails(t, tt.want, got.Details)
 			}
-			require.NoError(t, err)
-			integration.AssertResourceDetails(t, tt.want, got.Details)
 		})
 	}
 }

internal/api/grpc/resources/action/v3alpha/query.go

@@ -97,6 +97,7 @@ func targetToPb(t *query.Target) *action.GetTarget {
 			Timeout:  durationpb.New(t.Timeout),
 			Endpoint: t.Endpoint,
 		},
+		SigningKey: t.SigningKey,
 	}
 	switch t.TargetType {
 	case domain.TargetTypeWebhook:

internal/api/grpc/resources/action/v3alpha/target.go

@@ -25,7 +25,8 @@ func (s *Server) CreateTarget(ctx context.Context, req *action.CreateTargetReque
 		return nil, err
 	}
 	return &action.CreateTargetResponse{
-		Details: resource_object.DomainToDetailsPb(details, object.OwnerType_OWNER_TYPE_INSTANCE, instanceID),
+		Details:    resource_object.DomainToDetailsPb(details, object.OwnerType_OWNER_TYPE_INSTANCE, instanceID),
+		SigningKey: add.SigningKey,
 	}, nil
 }
 
@@ -34,12 +35,14 @@ func (s *Server) PatchTarget(ctx context.Context, req *action.PatchTargetRequest
 		return nil, err
 	}
 	instanceID := authz.GetInstance(ctx).InstanceID()
-	details, err := s.command.ChangeTarget(ctx, patchTargetToCommand(req), instanceID)
+	patch := patchTargetToCommand(req)
+	details, err := s.command.ChangeTarget(ctx, patch, instanceID)
 	if err != nil {
 		return nil, err
 	}
 	return &action.PatchTargetResponse{
-		Details: resource_object.DomainToDetailsPb(details, object.OwnerType_OWNER_TYPE_INSTANCE, instanceID),
+		Details:    resource_object.DomainToDetailsPb(details, object.OwnerType_OWNER_TYPE_INSTANCE, instanceID),
+		SigningKey: patch.SigningKey,
 	}, nil
 }
 
@@ -83,6 +86,12 @@ func createTargetToCommand(req *action.CreateTargetRequest) *command.AddTarget {
 }
 
 func patchTargetToCommand(req *action.PatchTargetRequest) *command.ChangeTarget {
+	expirationSigningKey := false
+	// TODO handle expiration, currently only immediate expiration is supported
+	if req.GetTarget().GetExpirationSigningKey() != nil {
+		expirationSigningKey = true
+	}
+
 	reqTarget := req.GetTarget()
 	if reqTarget == nil {
 		return nil
@@ -91,8 +100,9 @@ func patchTargetToCommand(req *action.PatchTargetRequest) *command.ChangeTarget
 		ObjectRoot: models.ObjectRoot{
 			AggregateID: req.GetId(),
 		},
-		Name:     reqTarget.Name,
-		Endpoint: reqTarget.Endpoint,
+		Name:                 reqTarget.Name,
+		Endpoint:             reqTarget.Endpoint,
+		ExpirationSigningKey: expirationSigningKey,
 	}
 	if reqTarget.TargetType != nil {
 		switch t := reqTarget.GetTargetType().(type) {