// Reads the current file size and validates it.
nsresult
nsIncrementalDownload::ReadCurrentSize()
{
int64_t size;
nsresult rv = mDest->GetFileSize((int64_t *) &size);
if (rv == NS_ERROR_FILE_NOT_FOUND ||
rv == NS_ERROR_FILE_TARGET_DOES_NOT_EXIST) {
mCurrentSize = 0;
return NS_OK;
}
if (NS_FAILED(rv))
return rv;
mCurrentSize = size;
return NS_OK;
}
nsresult
PendingLookup::SendRemoteQueryInternal()
{
// If we aren't supposed to do remote lookups, bail.
if (!Preferences::GetBool(PREF_SB_DOWNLOADS_REMOTE_ENABLED, false)) {
LOG(("Remote lookups are disabled [this = %p]", this));
return NS_ERROR_NOT_AVAILABLE;
}
// If the remote lookup URL is empty or absent, bail.
nsCString serviceUrl;
NS_ENSURE_SUCCESS(Preferences::GetCString(PREF_SB_APP_REP_URL, &serviceUrl),
NS_ERROR_NOT_AVAILABLE);
if (serviceUrl.IsEmpty()) {
LOG(("Remote lookup URL is empty [this = %p]", this));
return NS_ERROR_NOT_AVAILABLE;
}
// If the blocklist or allowlist is empty (so we couldn't do local lookups),
// bail
{
nsAutoCString table;
NS_ENSURE_SUCCESS(Preferences::GetCString(PREF_DOWNLOAD_BLOCK_TABLE,
&table),
NS_ERROR_NOT_AVAILABLE);
if (table.IsEmpty()) {
LOG(("Blocklist is empty [this = %p]", this));
return NS_ERROR_NOT_AVAILABLE;
}
}
#ifdef XP_WIN
// The allowlist is only needed to do signature verification on Windows
{
nsAutoCString table;
NS_ENSURE_SUCCESS(Preferences::GetCString(PREF_DOWNLOAD_ALLOW_TABLE,
&table),
NS_ERROR_NOT_AVAILABLE);
if (table.IsEmpty()) {
LOG(("Allowlist is empty [this = %p]", this));
return NS_ERROR_NOT_AVAILABLE;
}
}
#endif
LOG(("Sending remote query for application reputation [this = %p]",
this));
// We did not find a local result, so fire off the query to the
// application reputation service.
nsCOMPtr<nsIURI> uri;
nsresult rv;
rv = mQuery->GetSourceURI(getter_AddRefs(uri));
NS_ENSURE_SUCCESS(rv, rv);
nsCString spec;
rv = GetStrippedSpec(uri, spec);
NS_ENSURE_SUCCESS(rv, rv);
mRequest.set_url(spec.get());
uint32_t fileSize;
rv = mQuery->GetFileSize(&fileSize);
NS_ENSURE_SUCCESS(rv, rv);
mRequest.set_length(fileSize);
// We have no way of knowing whether or not a user initiated the
// download. Set it to true to lessen the chance of false positives.
mRequest.set_user_initiated(true);
nsCString locale;
NS_ENSURE_SUCCESS(Preferences::GetCString(PREF_GENERAL_LOCALE, &locale),
NS_ERROR_NOT_AVAILABLE);
mRequest.set_locale(locale.get());
nsCString sha256Hash;
rv = mQuery->GetSha256Hash(sha256Hash);
NS_ENSURE_SUCCESS(rv, rv);
mRequest.mutable_digests()->set_sha256(sha256Hash.Data());
nsString fileName;
rv = mQuery->GetSuggestedFileName(fileName);
NS_ENSURE_SUCCESS(rv, rv);
mRequest.set_file_basename(NS_ConvertUTF16toUTF8(fileName).get());
mRequest.set_download_type(GetDownloadType(fileName));
if (mRequest.signature().trusted()) {
LOG(("Got signed binary for remote application reputation check "
"[this = %p]", this));
} else {
LOG(("Got unsigned binary for remote application reputation check "
"[this = %p]", this));
}
// Serialize the protocol buffer to a string. This can only fail if we are
// out of memory, or if the protocol buffer req is missing required fields
// (only the URL for now).
std::string serialized;
if (!mRequest.SerializeToString(&serialized)) {
return NS_ERROR_UNEXPECTED;
}
LOG(("Serialized protocol buffer [this = %p]: (length=%d) %s", this,
serialized.length(), serialized.c_str()));
// Set the input stream to the serialized protocol buffer
nsCOMPtr<nsIStringInputStream> sstream =
do_CreateInstance("@mozilla.org/io/string-input-stream;1", &rv);
NS_ENSURE_SUCCESS(rv, rv);
rv = sstream->SetData(serialized.c_str(), serialized.length());
NS_ENSURE_SUCCESS(rv, rv);
// Set up the channel to transmit the request to the service.
nsCOMPtr<nsIIOService> ios = do_GetService(NS_IOSERVICE_CONTRACTID, &rv);
rv = ios->NewChannel2(serviceUrl,
nullptr,
nullptr,
nullptr, // aLoadingNode
nsContentUtils::GetSystemPrincipal(),
nullptr, // aTriggeringPrincipal
nsILoadInfo::SEC_ALLOW_CROSS_ORIGIN_DATA_IS_NULL,
nsIContentPolicy::TYPE_OTHER,
getter_AddRefs(mChannel));
NS_ENSURE_SUCCESS(rv, rv);
nsCOMPtr<nsILoadInfo> loadInfo = mChannel->GetLoadInfo();
if (loadInfo) {
loadInfo->SetOriginAttributes(
mozilla::NeckoOriginAttributes(NECKO_SAFEBROWSING_APP_ID, false));
}
nsCOMPtr<nsIHttpChannel> httpChannel(do_QueryInterface(mChannel, &rv));
NS_ENSURE_SUCCESS(rv, rv);
mozilla::Unused << httpChannel;
// Upload the protobuf to the application reputation service.
nsCOMPtr<nsIUploadChannel2> uploadChannel = do_QueryInterface(mChannel, &rv);
NS_ENSURE_SUCCESS(rv, rv);
rv = uploadChannel->ExplicitSetUploadStream(sstream,
NS_LITERAL_CSTRING("application/octet-stream"), serialized.size(),
NS_LITERAL_CSTRING("POST"), false);
NS_ENSURE_SUCCESS(rv, rv);
// Set the Safebrowsing cookie jar, so that the regular Google cookie is not
// sent with this request. See bug 897516.
DocShellOriginAttributes attrs;
attrs.mAppId = NECKO_SAFEBROWSING_APP_ID;
nsCOMPtr<nsIInterfaceRequestor> loadContext = new mozilla::LoadContext(attrs);
rv = mChannel->SetNotificationCallbacks(loadContext);
NS_ENSURE_SUCCESS(rv, rv);
uint32_t timeoutMs = Preferences::GetUint(PREF_SB_DOWNLOADS_REMOTE_TIMEOUT, 10000);
mTimeoutTimer = do_CreateInstance(NS_TIMER_CONTRACTID);
mTimeoutTimer->InitWithCallback(this, timeoutMs, nsITimer::TYPE_ONE_SHOT);
rv = mChannel->AsyncOpen2(this);
NS_ENSURE_SUCCESS(rv, rv);
return NS_OK;
}