use dnssec_prover::ser::parse_rr_stream;
use dnssec_prover::validation::{verify_rr_stream, ValidationError};
+use dnssec_prover::rr::Name;
+use dnssec_prover::query::{ProofBuilder, QueryBuf};
use wasm_bindgen::prelude::wasm_bindgen;
+extern crate alloc;
+use alloc::collections::VecDeque;
+
+use core::fmt::Write;
+
#[global_allocator]
static ALLOC: wee_alloc::WeeAlloc = wee_alloc::WeeAlloc::INIT;
#[wasm_bindgen]
-/// Verifies an RFC 9102-formatted proof and returns the [`VerifiedRRStream`] in JSON form.
-pub fn verify_byte_stream(stream: Vec<u8>) -> String {
- match do_verify_byte_stream(stream) {
+pub struct WASMProofBuilder(ProofBuilder, VecDeque<QueryBuf>);
+
+#[wasm_bindgen]
+/// Builds a proof builder which can generate a proof for records of the given `ty`pe at the given
+/// `name`.
+///
+/// After calling this [`get_next_query`] should be called to fetch the initial query.
+pub fn init_proof_builder(mut name: String, ty: u16) -> Option<WASMProofBuilder> {
+ if !name.ends_with('.') { name.push('.'); }
+ if let Ok(qname) = name.try_into() {
+ let (builder, initial_query) = ProofBuilder::new(&qname, ty);
+ let mut queries = VecDeque::with_capacity(4);
+ queries.push_back(initial_query);
+ Some(WASMProofBuilder(builder, queries))
+ } else {
+ None
+ }
+}
+
+#[wasm_bindgen]
+/// Processes a response to a query previously fetched from [`get_next_query`].
+///
+/// After calling this, [`get_next_query`] should be called until pending queries are exhausted and
+/// no more pending queries exist, at which point [`get_unverified_proof`] should be called.
+pub fn process_query_response(proof_builder: &mut WASMProofBuilder, response: Vec<u8>) {
+ if response.len() < u16::MAX as usize {
+ let mut answer = QueryBuf::new_zeroed(response.len() as u16);
+ answer.copy_from_slice(&response);
+ if let Ok(queries) = proof_builder.0.process_response(&answer) {
+ for query in queries {
+ proof_builder.1.push_back(query);
+ }
+ }
+ }
+}
+
+
+#[wasm_bindgen]
+/// Gets the next query (if any) that should be sent to the resolver for the given proof builder.
+///
+/// Once the resolver responds [`process_query_response`] should be called with the response.
+pub fn get_next_query(proof_builder: &mut WASMProofBuilder) -> Option<Vec<u8>> {
+ if let Some(query) = proof_builder.1.pop_front() {
+ Some(query.into_vec())
+ } else {
+ None
+ }
+}
+
+#[wasm_bindgen]
+/// Gets the final, unverified, proof once all queries fetched via [`get_next_query`] have
+/// completed and their responses passed to [`process_query_response`].
+pub fn get_unverified_proof(proof_builder: WASMProofBuilder) -> Option<Vec<u8>> {
+ proof_builder.0.finish_proof().ok().map(|(proof, _ttl)| proof)
+}
+
+#[wasm_bindgen]
+/// Verifies an RFC 9102-formatted proof and returns verified records matching the given name
+/// (resolving any C/DNAMEs as required).
+pub fn verify_byte_stream(stream: Vec<u8>, name_to_resolve: String) -> String {
+ let name = match Name::try_from(name_to_resolve) {
+ Ok(name) => name,
+ Err(()) => return "{\"error\":\"Bad name to resolve\"}".to_string(),
+ };
+ match do_verify_byte_stream(stream, name) {
Ok(r) => r,
Err(e) => format!("{{\"error\":\"{:?}\"}}", e),
}
}
-fn do_verify_byte_stream(stream: Vec<u8>) -> Result<String, ValidationError> {
+fn do_verify_byte_stream(stream: Vec<u8>, name_to_resolve: Name) -> Result<String, ValidationError> {
let rrs = parse_rr_stream(&stream).map_err(|()| ValidationError::Invalid)?;
let verified_rrs = verify_rr_stream(&rrs)?;
+ let resolved_rrs = verified_rrs.resolve_name(&name_to_resolve);
let mut resp = String::new();
- resp += &format!("{{\"valid_from\": {}, \"expires\": {}, \"max_cache_ttl\": {}, \"verified_rrs\": [",
- verified_rrs.valid_from, verified_rrs.expires, verified_rrs.max_cache_ttl);
- for (idx, rr) in verified_rrs.verified_rrs.iter().enumerate() {
- resp += &format!("{}\"{:?}\"", if idx != 0 { ", " } else { "" }, rr);
+ write!(&mut resp, "{}",
+ format_args!("{{\"valid_from\": {}, \"expires\": {}, \"max_cache_ttl\": {}, \"verified_rrs\": [",
+ verified_rrs.valid_from, verified_rrs.expires, verified_rrs.max_cache_ttl)
+ ).expect("Write to a String shouldn't fail");
+ for (idx, rr) in resolved_rrs.iter().enumerate() {
+ write!(&mut resp, "{}{}", if idx != 0 { ", " } else { "" }, rr.json())
+ .expect("Write to a String shouldn't fail");
}
resp += "]}";
Ok(resp)