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authorised fetch: log more details 

this will help debugging problems in the implementation; thanks to
@ShittyKopper for the suggestion
This commit is contained in:
dakkar 2024-01-08 18:53:39 +00:00
parent d3fbef20f4
commit 9d939bcc49
1 changed files with 12 additions and 10 deletions
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22
packages/backend/src/server/ActivityPubServerService.ts
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@ -162,23 +162,25 @@ export class ActivityPubServerService {
return true;
}
const keyId = new URL(signature.keyId);
const keyHost = this.utilityService.toPuny(keyId.hostname);
const logPrefix = `${request.id} ${request.url} (by ${request.headers['user-agent']}) apparently from ${keyHost}:`;
if (signature.params.headers.indexOf('host') === -1
|| request.headers.host !== this.config.host) {
// no destination host, or not us: refuse
this.authlogger.warn(`${request.id} ${request.url} no destination host, or not us: refuse`);
this.authlogger.warn(`${logPrefix} no destination host, or not us: refuse`);
reply.code(401);
return true;
}
const keyId = new URL(signature.keyId);
const keyHost = this.utilityService.toPuny(keyId.hostname);
const meta = await this.metaService.fetch();
if (this.utilityService.isBlockedHost(meta.blockedHosts, keyHost)) {
/* blocked instance: refuse (we don't care if the signature is
good, if they even pretend to be from a blocked instance,
they're out) */
this.authlogger.warn(`${request.id} ${request.url} instance ${keyHost} is blocked: refuse`);
this.authlogger.warn(`${logPrefix} instance is blocked: refuse`);
reply.code(401);
return true;
}
@ -193,13 +195,13 @@ export class ActivityPubServerService {
/* keyId is often in the shape `${user.uri}#${keyname}`, try
fetching information about the remote user */
const candidate = formatURL(keyId, { fragment: false });
this.authlogger.info(`${request.id} ${request.url} we don't know the user for keyId ${keyId}, trying to fetch via ${candidate}`);
this.authlogger.info(`${logPrefix} we don't know the user for keyId ${keyId}, trying to fetch via ${candidate}`);
authUser = await this.apDbResolverService.getAuthUserFromApId(candidate);
}
if (authUser?.key == null) {
// we can't figure out who the signer is, or we can't get their key: refuse
this.authlogger.warn(`${request.id} ${request.url} we can't figure out who the signer is, or we can't get their key: refuse`);
this.authlogger.warn(`${logPrefix} we can't figure out who the signer is, or we can't get their key: refuse`);
reply.code(401);
return true;
}
@ -207,20 +209,20 @@ export class ActivityPubServerService {
let httpSignatureValidated = httpSignature.verifySignature(signature, authUser.key.keyPem);
if (!httpSignatureValidated) {
this.authlogger.info(`${request.id} ${request.url} failed to validate signature, re-fetching the key for ${authUser.user.uri}`);
this.authlogger.info(`${logPrefix} failed to validate signature, re-fetching the key for ${authUser.user.uri}`);
// maybe they changed their key? refetch it
authUser.key = await this.apDbResolverService.refetchPublicKeyForApId(authUser.user);
if (authUser.key != null) {
httpSignatureValidated = httpSignature.verifySignature(signature, authUser.key.keyPem);
} else {
this.authlogger.warn(`${request.id} ${request.url} failed to re-fetch key for ${authUser.user}`);
this.authlogger.warn(`${logPrefix} failed to re-fetch key for ${authUser.user}`);
}
}
if (!httpSignatureValidated) {
// bad signature: refuse
this.authlogger.info(`${request.id} ${request.url} failed to validate signature: refuse`);
this.authlogger.info(`${logPrefix} failed to validate signature: refuse`);
reply.code(401);
return true;
}