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#![no_main]
use libfuzzer_sys::arbitrary;
use libfuzzer_sys::arbitrary::Arbitrary;
use libfuzzer_sys::fuzz_target;
use aero_dav::{realization, types, xml};
use quick_xml::reader::NsReader;
use tokio::io::AsyncWriteExt;
use tokio::runtime::Runtime;
// Split this file
const tokens: [&str; 63] = [
"0",
"1",
"activelock",
"allprop",
"encoding",
"utf-8",
"http://ns.example.com/boxschema/",
"HTTP/1.1 200 OK",
"1997-12-01T18:27:21-08:00",
"Mon, 12 Jan 1998 09:25:56 GMT",
"\"abcdef\"",
"cannot-modify-protected-property",
"collection",
"creationdate",
"DAV:",
"D",
"C",
"xmlns:D",
"depth",
"displayname",
"error",
"exclusive",
"getcontentlanguage",
"getcontentlength",
"getcontenttype",
"getetag",
"getlastmodified",
"href",
"include",
"Infinite",
"infinity",
"location",
"lockdiscovery",
"lockentry",
"lockinfo",
"lockroot",
"lockscope",
"locktoken",
"lock-token-matches-request-uri",
"lock-token-submitted",
"locktype",
"multistatus",
"no-conflicting-lock",
"no-external-entities",
"owner",
"preserved-live-properties",
"prop",
"propertyupdate",
"propfind",
"propfind-finite-depth",
"propname",
"propstat",
"remove",
"resourcetype",
"response",
"responsedescription",
"set",
"shared",
"status",
"supportedlock",
"text/html",
"timeout",
"write",
];
#[derive(Arbitrary)]
enum Token {
Known(usize),
//Unknown(String),
}
impl Token {
fn serialize(&self) -> String {
match self {
Self::Known(i) => tokens[i % tokens.len()].to_string(),
//Self::Unknown(v) => v.to_string(),
}
}
}
#[derive(Arbitrary)]
struct Tag {
//prefix: Option<Token>,
name: Token,
attr: Option<(Token, Token)>,
}
impl Tag {
fn start(&self) -> String {
let mut acc = String::new();
/*if let Some(p) = &self.prefix {
acc.push_str(p.serialize().as_str());
acc.push_str(":");
}*/
acc.push_str("D:");
acc.push_str(self.name.serialize().as_str());
if let Some((k, v)) = &self.attr {
acc.push_str(" ");
acc.push_str(k.serialize().as_str());
acc.push_str("=\"");
acc.push_str(v.serialize().as_str());
acc.push_str("\"");
}
acc
}
fn end(&self) -> String {
let mut acc = String::new();
acc.push_str("D:");
acc.push_str(self.name.serialize().as_str());
acc
}
}
#[derive(Arbitrary)]
enum XmlNode {
//@FIXME: build RFC3339 and RFC822 Dates with chrono based on timestamps
//@FIXME: add small numbers
//@FIXME: add http status code
Node(Tag, Vec<Self>),
Number(u64),
Text(Token),
}
impl std::fmt::Debug for XmlNode {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
write!(f, "{}", self.serialize())
}
}
impl XmlNode {
fn serialize(&self) -> String {
match self {
Self::Node(tag, children) => {
let stag = tag.start();
match children.is_empty() {
true => format!("<{}/>", stag),
false => format!(
"<{}>{}</{}>",
stag,
children.iter().map(|v| v.serialize()).collect::<String>(),
tag.end()
),
}
}
Self::Number(v) => format!("{}", v),
Self::Text(v) => v.serialize(),
}
}
}
async fn serialize(elem: &impl xml::QWrite) -> Vec<u8> {
let mut buffer = Vec::new();
let mut tokio_buffer = tokio::io::BufWriter::new(&mut buffer);
let q = quick_xml::writer::Writer::new_with_indent(&mut tokio_buffer, b' ', 4);
let ns_to_apply = vec![("xmlns:D".into(), "DAV:".into())];
let mut writer = xml::Writer { q, ns_to_apply };
elem.qwrite(&mut writer).await.expect("xml serialization");
tokio_buffer.flush().await.expect("tokio buffer flush");
return buffer;
}
type Object = types::Multistatus<realization::Core, types::PropValue<realization::Core>>;
fuzz_target!(|nodes: XmlNode| {
let gen = format!(
"<D:multistatus xmlns:D=\"DAV:\">{}<D:/multistatus>",
nodes.serialize()
);
//println!("--------\n{}", gen);
let data = gen.as_bytes();
let rt = Runtime::new().expect("tokio runtime initialization");
rt.block_on(async {
// 1. Setup fuzzing by finding an input that seems correct, do not crash yet then.
let mut rdr = match xml::Reader::new(NsReader::from_reader(data)).await {
Err(_) => return,
Ok(r) => r,
};
let reference = match rdr.find::<Object>().await {
Err(_) => return,
Ok(m) => m,
};
// 2. Re-serialize the input
let my_serialization = serialize(&reference).await;
// 3. De-serialize my serialization
let mut rdr2 = xml::Reader::new(NsReader::from_reader(my_serialization.as_slice()))
.await
.expect("XML Reader init");
let comparison = rdr2.find::<Object>().await.expect("Deserialize again");
// 4. Both the first decoding and last decoding must be identical
assert_eq!(reference, comparison);
})
});
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