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Better validation for 'Update'

This commit is contained in:
Bryan Ashby 2023-03-12 14:42:34 -06:00
parent ea9d826a7c
commit 3212d809df
No known key found for this signature in database
GPG Key ID: C2C1B501E4EFD994
1 changed files with 33 additions and 47 deletions
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80
core/servers/content/web_handlers/activitypub.js
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@ -241,10 +241,7 @@ exports.getModule = class ActivityPubWebHandler extends WebHandlerModule {
// Fetch and validate the signature of the remote Actor
Actor.fromId(getActorId(activity), (err, remoteActor) => {
// if (err) {
// return this.webServer.internalServerError(resp, err);
// }
// validate sig up front
const httpSigValidated =
remoteActor && this._validateActorSignature(remoteActor, signature);
if (activity.type !== WellKnownActivity.Delete && !httpSigValidated) {
@ -264,7 +261,6 @@ exports.getModule = class ActivityPubWebHandler extends WebHandlerModule {
case WellKnownActivity.Delete:
return this._inboxDeleteActivity(
inboxType,
signature,
resp,
activity,
httpSigValidated
@ -276,12 +272,11 @@ exports.getModule = class ActivityPubWebHandler extends WebHandlerModule {
const type = _.get(activity, 'object.type');
if ('Note' === type) {
// :TODO: get rid of this extra indirection
return this._inboxMutateExistingObject(
return this._inboxUpdateExistingObject(
inboxType,
signature,
resp,
activity,
this._inboxUpdateObjectMutator.bind(this)
httpSigValidated
);
} else {
this.log.warn(
@ -467,7 +462,7 @@ exports.getModule = class ActivityPubWebHandler extends WebHandlerModule {
);
}
_inboxDeleteActivity(inboxType, signature, resp, activity, httpSigValidated) {
_inboxDeleteActivity(inboxType, resp, activity, httpSigValidated) {
const objectId = _.get(activity, 'object.id', activity.object);
this.log.info({ inboxType, objectId }, 'Incoming Delete request');
@ -762,7 +757,7 @@ exports.getModule = class ActivityPubWebHandler extends WebHandlerModule {
return true;
}
_inboxMutateExistingObject(inboxType, signature, resp, activity, mutator) {
_inboxUpdateExistingObject(inboxType, resp, activity, httpSigValidated) {
const targetObjectId = _.get(activity, 'object.id');
const objectType = _.get(activity, 'object.type');
@ -779,53 +774,44 @@ exports.getModule = class ActivityPubWebHandler extends WebHandlerModule {
return this.webServer.resourceNotFound(resp);
}
//
// Object exists; Validate we allow the action by origin
// comparing the request's keyId origin to the object's
//
try {
const updateTargetHost = new URL(obj.object.id).host;
const keyIdHost = new URL(signature.keyId).host;
if (updateTargetHost !== keyIdHost) {
this._verifyObjectOwner(httpSigValidated, obj, activity, err => {
if (err) {
this.log.warn(
{
targetObjectId,
type: objectType,
updateTargetHost,
keyIdHost,
activityType: activity.type,
error: err.message,
inboxType,
objectId: targetObjectId,
objectType,
},
`Attempt to ${activity.type} Object of non-matching origin`
'Will not Update object: Signature mismatch'
);
return this.webServer.accessDenied(resp);
}
return mutator(inboxType, resp, objectType, targetObjectId, activity);
} catch (e) {
return this.webServer.internalServerError(resp, e);
}
});
}
_inboxUpdateObjectMutator(inboxType, resp, objectType, targetObjectId, activity) {
Collection.updateCollectionEntry(inboxType, targetObjectId, activity, err => {
if (err) {
return this.webServer.internalServerError(resp, err);
}
this.log.info(
{
Collection.updateCollectionEntry(
inboxType,
objectId: targetObjectId,
objectType,
},
`${objectType} Updated`
);
targetObjectId,
activity,
err => {
if (err) {
return this.webServer.internalServerError(resp, err);
}
// :TODO: we need to UPDATE the existing stored Message object if this is a Note
this.log.info(
{
inboxType,
objectId: targetObjectId,
objectType,
},
`${objectType} Updated`
);
return this.webServer.accepted(resp);
// :TODO: we need to UPDATE the existing stored Message object if this is a Note
return this.webServer.accepted(resp);
}
);
});
});
}