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Merge pull request #3231 from kpfleming/icon-blacklist-improvements

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Generate distinct log messages for regex vs. IP blacklisting.
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Daniel García 2023-02-12 18:43:26 +01:00 committed by GitHub
commit 79061c0eb5
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1 changed files with 19 additions and 9 deletions
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28
src/api/icons.rs
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@ -79,7 +79,7 @@ async fn icon_redirect(domain: &str, template: &str) -> Option<Redirect> {
return None;
}
if is_domain_blacklisted(domain).await {
if check_domain_blacklist_reason(domain).await.is_some() {
return None;
}
@ -258,9 +258,15 @@ mod tests {
}
}
#[derive(Debug, Clone)]
enum DomainBlacklistReason {
Regex,
IP,
}
use cached::proc_macro::cached;
#[cached(key = "String", convert = r#"{ domain.to_string() }"#, size = 16, time = 60)]
async fn is_domain_blacklisted(domain: &str) -> bool {
async fn check_domain_blacklist_reason(domain: &str) -> Option<DomainBlacklistReason> {
// First check the blacklist regex if there is a match.
// This prevents the blocked domain(s) from being leaked via a DNS lookup.
if let Some(blacklist) = CONFIG.icon_blacklist_regex() {
@ -284,7 +290,7 @@ async fn is_domain_blacklisted(domain: &str) -> bool {
if is_match {
debug!("Blacklisted domain: {} matched ICON_BLACKLIST_REGEX", domain);
return true;
return Some(DomainBlacklistReason::Regex);
}
}
@ -293,13 +299,13 @@ async fn is_domain_blacklisted(domain: &str) -> bool {
for addr in s {
if !is_global(addr.ip()) {
debug!("IP {} for domain '{}' is not a global IP!", addr.ip(), domain);
return true;
return Some(DomainBlacklistReason::IP);
}
}
}
}
false
None
}
async fn get_icon(domain: &str) -> Option<(Vec<u8>, String)> {
@ -564,8 +570,10 @@ async fn get_page(url: &str) -> Result<Response, Error> {
}
async fn get_page_with_referer(url: &str, referer: &str) -> Result<Response, Error> {
if is_domain_blacklisted(url::Url::parse(url).unwrap().host_str().unwrap_or_default()).await {
warn!("Favicon '{}' resolves to a blacklisted domain or IP!", url);
match check_domain_blacklist_reason(url::Url::parse(url).unwrap().host_str().unwrap_or_default()).await {
Some(DomainBlacklistReason::Regex) => warn!("Favicon '{}' is from a blacklisted domain!", url),
Some(DomainBlacklistReason::IP) => warn!("Favicon '{}' is hosted on a non-global IP!", url),
None => (),
}
let mut client = CLIENT.get(url);
@ -659,8 +667,10 @@ fn parse_sizes(sizes: &str) -> (u16, u16) {
}
async fn download_icon(domain: &str) -> Result<(Bytes, Option<&str>), Error> {
if is_domain_blacklisted(domain).await {
err_silent!("Domain is blacklisted", domain)
match check_domain_blacklist_reason(domain).await {
Some(DomainBlacklistReason::Regex) => err_silent!("Domain is blacklisted", domain),
Some(DomainBlacklistReason::IP) => err_silent!("Host resolves to a non-global IP", domain),
None => (),
}
let icon_result = get_icon_url(domain).await?;