_ Git - dnssec-prover/blob - src/query.rs

   1 //! This module exposes utilities for building DNSSEC proofs by directly querying a recursive
   2 //! resolver.
   3
   4 use core::{cmp, ops};
   5 use alloc::vec;
   6 use alloc::vec::Vec;
   7
   8 #[cfg(feature = "std")]
   9 use std::net::{SocketAddr, TcpStream};
  10 #[cfg(feature = "std")]
  11 use std::io::{Read, Write, Error, ErrorKind};
  12
  13 #[cfg(feature = "tokio")]
  14 use tokio_crate::net::TcpStream as TokioTcpStream;
  15 #[cfg(feature = "tokio")]
  16 use tokio_crate::io::{AsyncReadExt, AsyncWriteExt};
  17
  18 use crate::rr::*;
  19 use crate::ser::*;
  20
  21 // In testing use a rather small buffer to ensure we hit the allocation paths sometimes. In
  22 // production, we should generally never actually need to go to heap as DNS messages are rarely
  23 // larger than a KiB or two.
  24 #[cfg(any(test, fuzzing))]
  25 const STACK_BUF_LIMIT: u16 = 32;
  26 #[cfg(not(any(test, fuzzing)))]
  27 const STACK_BUF_LIMIT: u16 = 2048;
  28
  29 /// A buffer for storing queries and responses.
  30 #[derive(Clone, PartialEq, Eq)]
  31 pub struct QueryBuf {
  32         buf: [u8; STACK_BUF_LIMIT as usize],
  33         heap_buf: Vec<u8>,
  34         len: u16,
  35 }
  36 impl QueryBuf {
  37         /// Generates a new buffer of the given length, consisting of all zeros.
  38         pub fn new_zeroed(len: u16) -> Self {
  39                 let heap_buf = if len > STACK_BUF_LIMIT { vec![0; len as usize] } else { Vec::new() };
  40                 Self {
  41                         buf: [0; STACK_BUF_LIMIT as usize],
  42                         heap_buf,
  43                         len
  44                 }
  45         }
  46         /// Extends the size of this buffer by appending the given slice.
  47         ///
  48         /// If the total length of this buffer exceeds [`u16::MAX`] after appending, the buffer's state
  49         /// is undefined, however pushing data beyond [`u16::MAX`] will not panic.
  50         pub fn extend_from_slice(&mut self, sl: &[u8]) {
  51                 let new_len = self.len.saturating_add(sl.len() as u16);
  52                 let was_heap = self.len > STACK_BUF_LIMIT;
  53                 let is_heap = new_len > STACK_BUF_LIMIT;
  54                 if was_heap != is_heap {
  55                         self.heap_buf = vec![0; new_len as usize];
  56                         self.heap_buf[..self.len as usize].copy_from_slice(&self.buf[..self.len as usize]);
  57                 }
  58                 let target = if is_heap {
  59                         self.heap_buf.resize(new_len as usize, 0);
  60                         &mut self.heap_buf[self.len as usize..]
  61                 } else {
  62                         &mut self.buf[self.len as usize..new_len as usize]
  63                 };
  64                 target.copy_from_slice(sl);
  65                 self.len = new_len;
  66         }
  67         /// Converts this query into its bytes on the heap
  68         pub fn into_vec(self) -> Vec<u8> {
  69                 if self.len > STACK_BUF_LIMIT {
  70                         self.heap_buf
  71                 } else {
  72                         self.buf[..self.len as usize].to_vec()
  73                 }
  74         }
  75 }
  76 impl ops::Deref for QueryBuf {
  77         type Target = [u8];
  78         fn deref(&self) -> &[u8] {
  79                 if self.len > STACK_BUF_LIMIT {
  80                         &self.heap_buf
  81                 } else {
  82                         &self.buf[..self.len as usize]
  83                 }
  84         }
  85 }
  86 impl ops::DerefMut for QueryBuf {
  87         fn deref_mut(&mut self) -> &mut [u8] {
  88                 if self.len > STACK_BUF_LIMIT {
  89                         &mut self.heap_buf
  90                 } else {
  91                         &mut self.buf[..self.len as usize]
  92                 }
  93         }
  94 }
  95
  96 // We don't care about transaction IDs as we're only going to accept signed data.
  97 // Further, if we're querying over DoH, the RFC says we SHOULD use a transaction ID of 0 here.
  98 const TXID: u16 = 0;
  99
 100 fn build_query(domain: &Name, ty: u16) -> QueryBuf {
 101         let mut query = QueryBuf::new_zeroed(0);
 102         query.extend_from_slice(&TXID.to_be_bytes());
 103         query.extend_from_slice(&[0x01, 0x20]); // Flags: Recursive, Authenticated Data
 104         query.extend_from_slice(&[0, 1, 0, 0, 0, 0, 0, 1]); // One question, One additional
 105         write_name(&mut query, domain);
 106         query.extend_from_slice(&ty.to_be_bytes());
 107         query.extend_from_slice(&1u16.to_be_bytes()); // INternet class
 108         query.extend_from_slice(&[0, 0, 0x29]); // . OPT
 109         query.extend_from_slice(&0u16.to_be_bytes()); // 0 UDP payload size
 110         query.extend_from_slice(&[0, 0]); // EDNS version 0
 111         query.extend_from_slice(&0x8000u16.to_be_bytes()); // Accept DNSSEC RRs
 112         query.extend_from_slice(&0u16.to_be_bytes()); // No additional data
 113         query
 114 }
 115
 116 #[cfg(fuzzing)]
 117 /// Read some input and parse it as if it came from a server, for fuzzing.
 118 pub fn fuzz_response(response: &[u8]) {
 119         let (mut proof, mut names) = (Vec::new(), Vec::new());
 120         let _ = handle_response(response, &mut proof, &mut names);
 121 }
 122
 123 fn handle_response(resp: &[u8], proof: &mut Vec<u8>, rrsig_key_names: &mut Vec<Name>) -> Result<u32, ()> {
 124         let mut read: &[u8] = resp;
 125         if read_u16(&mut read)? != TXID { return Err(()); }
 126         // 2 byte transaction ID
 127         let flags = read_u16(&mut read)?;
 128         if flags & 0b1000_0000_0000_0000 == 0 {
 129                 return Err(());
 130         }
 131         if flags & 0b0111_1010_0000_0111 != 0 {
 132                 return Err(());
 133         }
 134         if flags & 0b10_0000 == 0 {
 135                 return Err(());
 136         }
 137         let questions = read_u16(&mut read)?;
 138         if questions != 1 { return Err(()); }
 139         let answers = read_u16(&mut read)?;
 140         if answers == 0 { return Err(()); }
 141         let authorities = read_u16(&mut read)?;
 142         let _additional = read_u16(&mut read)?;
 143
 144         for _ in 0..questions {
 145                 read_wire_packet_name(&mut read, resp)?;
 146                 read_u16(&mut read)?; // type
 147                 read_u16(&mut read)?; // class
 148         }
 149
 150         // Only read the answers and NSEC records in authorities, skipping additional entirely.
 151         let mut min_ttl = u32::MAX;
 152         for _ in 0..answers {
 153                 let (rr, ttl) = parse_wire_packet_rr(&mut read, &resp)?;
 154                 write_rr(&rr, ttl, proof);
 155                 min_ttl = cmp::min(min_ttl, ttl);
 156                 if let RR::RRSig(rrsig) = rr { rrsig_key_names.push(rrsig.key_name); }
 157         }
 158
 159         for _ in 0..authorities {
 160                 // Only include records from the authority section if they are NSEC/3 (or signatures
 161                 // thereover). We don't care about NS records here.
 162                 let (rr, ttl) = parse_wire_packet_rr(&mut read, &resp)?;
 163                 match &rr {
 164                         RR::RRSig(rrsig) => {
 165                                 if rrsig.ty != NSec::TYPE && rrsig.ty != NSec3::TYPE {
 166                                         continue;
 167                                 }
 168                         },
 169                         RR::NSec(_)|RR::NSec3(_) => {},
 170                         _ => continue,
 171                 }
 172                 write_rr(&rr, ttl, proof);
 173                 min_ttl = cmp::min(min_ttl, ttl);
 174                 if let RR::RRSig(rrsig) = rr { rrsig_key_names.push(rrsig.key_name); }
 175         }
 176
 177         Ok(min_ttl)
 178 }
 179
 180 #[cfg(fuzzing)]
 181 /// Read a stream of responses and handle them it as if they came from a server, for fuzzing.
 182 pub fn fuzz_proof_builder(mut response_stream: &[u8]) {
 183         let (mut builder, _) = ProofBuilder::new(&"example.com.".try_into().unwrap(), Txt::TYPE);
 184         while builder.awaiting_responses() {
 185                 let len = if let Ok(len) = read_u16(&mut response_stream) { len } else { return };
 186                 let mut buf = QueryBuf::new_zeroed(len);
 187                 if response_stream.len() < len as usize { return; }
 188                 buf.copy_from_slice(&response_stream[..len as usize]);
 189                 response_stream = &response_stream[len as usize..];
 190                 let _ = builder.process_response(&buf);
 191         }
 192         let _ = builder.finish_proof();
 193 }
 194
 195 const MAX_REQUESTS: usize = 10;
 196 /// A simple state machine which will generate a series of queries and process the responses until
 197 /// it has built a DNSSEC proof.
 198 ///
 199 /// A [`ProofBuilder`] driver starts with [`ProofBuilder::new`], fetching the state machine and
 200 /// initial query. As long as [`ProofBuilder::awaiting_responses`] returns true, responses should
 201 /// be read from the resolver. For each query response read from the DNS resolver,
 202 /// [`ProofBuilder::process_response`] should be called, and each fresh query returned should be
 203 /// sent to the resolver. Once [`ProofBuilder::awaiting_responses`] returns false,
 204 /// [`ProofBuilder::finish_proof`] should be called to fetch the resulting proof.
 205 ///
 206 /// To build a DNSSEC proof using a DoH server, take each [`QueryBuf`], encode it as base64url, and
 207 /// make a query to `https://doh-server/endpoint?dns=base64url_encoded_query` with an `Accept`
 208 /// header of `application/dns-message`. Each response, in raw binary, can be fed directly into
 209 /// [`ProofBuilder::process_response`].
 210 pub struct ProofBuilder {
 211         proof: Vec<u8>,
 212         min_ttl: u32,
 213         dnskeys_requested: Vec<Name>,
 214         pending_queries: usize,
 215         queries_made: usize,
 216 }
 217
 218 impl ProofBuilder {
 219         /// Constructs a new [`ProofBuilder`] and an initial query to send to the recursive resolver to
 220         /// begin the proof building process.
 221         ///
 222         /// Given a correctly-functioning resolver the proof will ultimately be able to prove the
 223         /// contents of any records with the given `ty`pe at the given `name` (as long as the given
 224         /// `ty`pe is supported by this library).
 225         ///
 226         /// You can find constants for supported standard types in the [`crate::rr`] module.
 227         pub fn new(name: &Name, ty: u16) -> (ProofBuilder, QueryBuf) {
 228                 let initial_query = build_query(name, ty);
 229                 (ProofBuilder {
 230                         proof: Vec::new(),
 231                         min_ttl: u32::MAX,
 232                         dnskeys_requested: Vec::with_capacity(MAX_REQUESTS),
 233                         pending_queries: 1,
 234                         queries_made: 1,
 235                 }, initial_query)
 236         }
 237
 238         /// Returns true as long as further responses are expected from the resolver.
 239         ///
 240         /// As long as this returns true, responses should be read from the resolver and passed to
 241         /// [`Self::process_response`]. Once this returns false, [`Self::finish_proof`] should be used
 242         /// to (possibly) get the final proof.
 243         pub fn awaiting_responses(&self) -> bool {
 244                 self.pending_queries > 0 && self.queries_made <= MAX_REQUESTS
 245         }
 246
 247         /// Processes a query response from the recursive resolver, returning a list of new queries to
 248         /// send to the resolver.
 249         pub fn process_response(&mut self, resp: &QueryBuf) -> Result<Vec<QueryBuf>, ()> {
 250                 if self.pending_queries == 0 { return Err(()); }
 251
 252                 let mut rrsig_key_names = Vec::new();
 253                 let min_ttl = handle_response(&resp, &mut self.proof, &mut rrsig_key_names)?;
 254                 self.min_ttl = cmp::min(self.min_ttl, min_ttl);
 255                 self.pending_queries -= 1;
 256
 257                 rrsig_key_names.sort_unstable();
 258                 rrsig_key_names.dedup();
 259
 260                 let mut new_queries = Vec::with_capacity(2);
 261                 for key_name in rrsig_key_names.drain(..) {
 262                         if !self.dnskeys_requested.contains(&key_name) {
 263                                 new_queries.push(build_query(&key_name, DnsKey::TYPE));
 264                                 self.pending_queries += 1;
 265                                 self.queries_made += 1;
 266                                 self.dnskeys_requested.push(key_name.clone());
 267
 268                                 if key_name.as_str() != "." {
 269                                         new_queries.push(build_query(&key_name, DS::TYPE));
 270                                         self.pending_queries += 1;
 271                                         self.queries_made += 1;
 272                                 }
 273                         }
 274                 }
 275                 if self.queries_made <= MAX_REQUESTS {
 276                         Ok(new_queries)
 277                 } else {
 278                         Ok(Vec::new())
 279                 }
 280         }
 281
 282         /// Finalizes the proof, if one is available, and returns it as well as the TTL that should be
 283         /// used to cache the proof (i.e. the lowest TTL of all records which were used to build the
 284         /// proof).
 285         pub fn finish_proof(self) -> Result<(Vec<u8>, u32), ()> {
 286                 if self.pending_queries > 0 || self.queries_made > MAX_REQUESTS {
 287                         Err(())
 288                 } else {
 289                         Ok((self.proof, self.min_ttl))
 290                 }
 291         }
 292 }
 293
 294 #[cfg(feature = "std")]
 295 fn send_query(stream: &mut TcpStream, query: &[u8]) -> Result<(), Error> {
 296         stream.write_all(&(query.len() as u16).to_be_bytes())?;
 297         stream.write_all(&query)?;
 298         Ok(())
 299 }
 300
 301 #[cfg(feature = "tokio")]
 302 async fn send_query_async(stream: &mut TokioTcpStream, query: &[u8]) -> Result<(), Error> {
 303         stream.write_all(&(query.len() as u16).to_be_bytes()).await?;
 304         stream.write_all(&query).await?;
 305         Ok(())
 306 }
 307
 308 #[cfg(feature = "std")]
 309 fn read_response(stream: &mut TcpStream) -> Result<QueryBuf, Error> {
 310         let mut len_bytes = [0; 2];
 311         stream.read_exact(&mut len_bytes)?;
 312         let mut buf = QueryBuf::new_zeroed(u16::from_be_bytes(len_bytes));
 313         stream.read_exact(&mut buf)?;
 314         Ok(buf)
 315 }
 316
 317 #[cfg(feature = "tokio")]
 318 async fn read_response_async(stream: &mut TokioTcpStream) -> Result<QueryBuf, Error> {
 319         let mut len_bytes = [0; 2];
 320         stream.read_exact(&mut len_bytes).await?;
 321         let mut buf = QueryBuf::new_zeroed(u16::from_be_bytes(len_bytes));
 322         stream.read_exact(&mut buf).await?;
 323         Ok(buf)
 324 }
 325
 326 #[cfg(feature = "std")]
 327 macro_rules! build_proof_impl {
 328         ($stream: ident, $send_query: ident, $read_response: ident, $domain: expr, $ty: expr $(, $async_ok: tt)?) => { {
 329                 // We require the initial query to have already gone out, and assume our resolver will
 330                 // return any CNAMEs all the way to the final record in the response. From there, we just
 331                 // have to take any RRSIGs in the response and walk them up to the root. We do so
 332                 // iteratively, sending DNSKEY and DS lookups after every response, deduplicating requests
 333                 // using `dnskeys_requested`.
 334                 let (mut builder, initial_query) = ProofBuilder::new($domain, $ty);
 335                 $send_query(&mut $stream, &initial_query)
 336                         $(.await?; $async_ok)??; // Either await?; Ok(())?, or just ?
 337                 while builder.awaiting_responses() {
 338                         let response = $read_response(&mut $stream)
 339                                 $(.await?; $async_ok)??; // Either await?; Ok(())?, or just ?
 340                         let new_queries = builder.process_response(&response)
 341                                 .map_err(|()| Error::new(ErrorKind::Other, "Bad response"))?;
 342                         for query in new_queries {
 343                                 $send_query(&mut $stream, &query)
 344                                         $(.await?; $async_ok)??; // Either await?; Ok(())?, or just ?
 345                         }
 346                 }
 347
 348                 builder.finish_proof()
 349                         .map_err(|()| Error::new(ErrorKind::Other, "Too many requests required"))
 350         } }
 351 }
 352
 353 #[cfg(feature = "std")]
 354 fn build_proof(resolver: SocketAddr, domain: &Name, ty: u16) -> Result<(Vec<u8>, u32), Error> {
 355         let mut stream = TcpStream::connect(resolver)?;
 356         build_proof_impl!(stream, send_query, read_response, domain, ty)
 357 }
 358
 359 #[cfg(feature = "tokio")]
 360 async fn build_proof_async(resolver: SocketAddr, domain: &Name, ty: u16) -> Result<(Vec<u8>, u32), Error> {
 361         let mut stream = TokioTcpStream::connect(resolver).await?;
 362         build_proof_impl!(stream, send_query_async, read_response_async, domain, ty, { Ok::<(), Error>(()) })
 363 }
 364
 365 /// Builds a DNSSEC proof for an A record by querying a recursive resolver, returning the proof as
 366 /// well as the TTL for the proof provided by the recursive resolver.
 367 ///
 368 /// Note that this proof is NOT verified in any way, you need to use the [`crate::validation`]
 369 /// module to validate the records contained.
 370 #[cfg(feature = "std")]
 371 pub fn build_a_proof(resolver: SocketAddr, domain: &Name) -> Result<(Vec<u8>, u32), Error> {
 372         build_proof(resolver, domain, A::TYPE)
 373 }
 374
 375 /// Builds a DNSSEC proof for an AAAA record by querying a recursive resolver, returning the proof
 376 /// as well as the TTL for the proof provided by the recursive resolver.
 377 ///
 378 /// Note that this proof is NOT verified in any way, you need to use the [`crate::validation`]
 379 /// module to validate the records contained.
 380 #[cfg(feature = "std")]
 381 pub fn build_aaaa_proof(resolver: SocketAddr, domain: &Name) -> Result<(Vec<u8>, u32), Error> {
 382         build_proof(resolver, domain, AAAA::TYPE)
 383 }
 384
 385 /// Builds a DNSSEC proof for an TXT record by querying a recursive resolver, returning the proof
 386 /// as well as the TTL for the proof provided by the recursive resolver.
 387 ///
 388 /// Note that this proof is NOT verified in any way, you need to use the [`crate::validation`]
 389 /// module to validate the records contained.
 390 #[cfg(feature = "std")]
 391 pub fn build_txt_proof(resolver: SocketAddr, domain: &Name) -> Result<(Vec<u8>, u32), Error> {
 392         build_proof(resolver, domain, Txt::TYPE)
 393 }
 394
 395 /// Builds a DNSSEC proof for an TLSA record by querying a recursive resolver, returning the proof
 396 /// as well as the TTL for the proof provided by the recursive resolver.
 397 ///
 398 /// Note that this proof is NOT verified in any way, you need to use the [`crate::validation`]
 399 /// module to validate the records contained.
 400 #[cfg(feature = "std")]
 401 pub fn build_tlsa_proof(resolver: SocketAddr, domain: &Name) -> Result<(Vec<u8>, u32), Error> {
 402         build_proof(resolver, domain, TLSA::TYPE)
 403 }
 404
 405
 406 /// Builds a DNSSEC proof for an A record by querying a recursive resolver, returning the proof as
 407 /// well as the TTL for the proof provided by the recursive resolver.
 408 ///
 409 /// Note that this proof is NOT verified in any way, you need to use the [`crate::validation`]
 410 /// module to validate the records contained.
 411 #[cfg(feature = "tokio")]
 412 pub async fn build_a_proof_async(resolver: SocketAddr, domain: &Name) -> Result<(Vec<u8>, u32), Error> {
 413         build_proof_async(resolver, domain, A::TYPE).await
 414 }
 415
 416 /// Builds a DNSSEC proof for an AAAA record by querying a recursive resolver, returning the proof
 417 /// as well as the TTL for the proof provided by the recursive resolver.
 418 ///
 419 /// Note that this proof is NOT verified in any way, you need to use the [`crate::validation`]
 420 /// module to validate the records contained.
 421 #[cfg(feature = "tokio")]
 422 pub async fn build_aaaa_proof_async(resolver: SocketAddr, domain: &Name) -> Result<(Vec<u8>, u32), Error> {
 423         build_proof_async(resolver, domain, AAAA::TYPE).await
 424 }
 425
 426 /// Builds a DNSSEC proof for an TXT record by querying a recursive resolver, returning the proof
 427 /// as well as the TTL for the proof provided by the recursive resolver.
 428 ///
 429 /// Note that this proof is NOT verified in any way, you need to use the [`crate::validation`]
 430 /// module to validate the records contained.
 431 #[cfg(feature = "tokio")]
 432 pub async fn build_txt_proof_async(resolver: SocketAddr, domain: &Name) -> Result<(Vec<u8>, u32), Error> {
 433         build_proof_async(resolver, domain, Txt::TYPE).await
 434 }
 435
 436 /// Builds a DNSSEC proof for an TLSA record by querying a recursive resolver, returning the proof
 437 /// as well as the TTL for the proof provided by the recursive resolver.
 438 ///
 439 /// Note that this proof is NOT verified in any way, you need to use the [`crate::validation`]
 440 /// module to validate the records contained.
 441 #[cfg(feature = "tokio")]
 442 pub async fn build_tlsa_proof_async(resolver: SocketAddr, domain: &Name) -> Result<(Vec<u8>, u32), Error> {
 443         build_proof_async(resolver, domain, TLSA::TYPE).await
 444 }
 445
 446 #[cfg(all(feature = "validation", feature = "std", test))]
 447 mod tests {
 448         use super::*;
 449         use crate::validation::*;
 450
 451         use rand::seq::SliceRandom;
 452
 453         use std::net::ToSocketAddrs;
 454         use std::time::SystemTime;
 455
 456         #[test]
 457         fn test_cloudflare_txt_query() {
 458                 let sockaddr = "8.8.8.8:53".to_socket_addrs().unwrap().next().unwrap();
 459                 let query_name = "cloudflare.com.".try_into().unwrap();
 460                 let (proof, _) = build_txt_proof(sockaddr, &query_name).unwrap();
 461
 462                 let mut rrs = parse_rr_stream(&proof).unwrap();
 463                 rrs.shuffle(&mut rand::rngs::OsRng);
 464                 let verified_rrs = verify_rr_stream(&rrs).unwrap();
 465                 assert!(verified_rrs.verified_rrs.len() > 1);
 466
 467                 let now = SystemTime::now().duration_since(SystemTime::UNIX_EPOCH).unwrap().as_secs();
 468                 assert!(verified_rrs.valid_from < now);
 469                 assert!(verified_rrs.expires > now);
 470         }
 471
 472         #[test]
 473         fn test_sha1_query() {
 474                 let sockaddr = "8.8.8.8:53".to_socket_addrs().unwrap().next().unwrap();
 475                 let query_name = "benthecarman.com.".try_into().unwrap();
 476                 let (proof, _) = build_a_proof(sockaddr, &query_name).unwrap();
 477
 478                 let mut rrs = parse_rr_stream(&proof).unwrap();
 479                 rrs.shuffle(&mut rand::rngs::OsRng);
 480                 let verified_rrs = verify_rr_stream(&rrs).unwrap();
 481                 assert!(verified_rrs.verified_rrs.len() >= 1);
 482
 483                 let now = SystemTime::now().duration_since(SystemTime::UNIX_EPOCH).unwrap().as_secs();
 484                 assert!(verified_rrs.valid_from < now);
 485                 assert!(verified_rrs.expires > now);
 486         }
 487
 488         #[test]
 489         fn test_txt_query() {
 490                 let sockaddr = "8.8.8.8:53".to_socket_addrs().unwrap().next().unwrap();
 491                 let query_name = "matt.user._bitcoin-payment.mattcorallo.com.".try_into().unwrap();
 492                 let (proof, _) = build_txt_proof(sockaddr, &query_name).unwrap();
 493
 494                 let mut rrs = parse_rr_stream(&proof).unwrap();
 495                 rrs.shuffle(&mut rand::rngs::OsRng);
 496                 let verified_rrs = verify_rr_stream(&rrs).unwrap();
 497                 assert_eq!(verified_rrs.verified_rrs.len(), 1);
 498
 499                 let now = SystemTime::now().duration_since(SystemTime::UNIX_EPOCH).unwrap().as_secs();
 500                 assert!(verified_rrs.valid_from < now);
 501                 assert!(verified_rrs.expires > now);
 502         }
 503
 504         #[test]
 505         fn test_cname_query() {
 506                 for resolver in ["1.1.1.1:53", "8.8.8.8:53", "9.9.9.9:53"] {
 507                         let sockaddr = resolver.to_socket_addrs().unwrap().next().unwrap();
 508                         let query_name = "cname_test.dnssec_proof_tests.bitcoin.ninja.".try_into().unwrap();
 509                         let (proof, _) = build_txt_proof(sockaddr, &query_name).unwrap();
 510
 511                         let mut rrs = parse_rr_stream(&proof).unwrap();
 512                         rrs.shuffle(&mut rand::rngs::OsRng);
 513                         let verified_rrs = verify_rr_stream(&rrs).unwrap();
 514                         assert_eq!(verified_rrs.verified_rrs.len(), 2);
 515
 516                         let now = SystemTime::now().duration_since(SystemTime::UNIX_EPOCH).unwrap().as_secs();
 517                         assert!(verified_rrs.valid_from < now);
 518                         assert!(verified_rrs.expires > now);
 519
 520                         let resolved_rrs = verified_rrs.resolve_name(&query_name);
 521                         assert_eq!(resolved_rrs.len(), 1);
 522                         if let RR::Txt(txt) = &resolved_rrs[0] {
 523                                 assert_eq!(txt.name.as_str(), "txt_test.dnssec_proof_tests.bitcoin.ninja.");
 524                                 assert_eq!(txt.data, b"dnssec_prover_test");
 525                         } else { panic!(); }
 526                 }
 527         }
 528
 529         #[cfg(feature = "tokio")]
 530         use tokio_crate as tokio;
 531
 532         #[cfg(feature = "tokio")]
 533         #[tokio::test]
 534         async fn test_txt_query_async() {
 535                 let sockaddr = "8.8.8.8:53".to_socket_addrs().unwrap().next().unwrap();
 536                 let query_name = "matt.user._bitcoin-payment.mattcorallo.com.".try_into().unwrap();
 537                 let (proof, _) = build_txt_proof_async(sockaddr, &query_name).await.unwrap();
 538
 539                 let mut rrs = parse_rr_stream(&proof).unwrap();
 540                 rrs.shuffle(&mut rand::rngs::OsRng);
 541                 let verified_rrs = verify_rr_stream(&rrs).unwrap();
 542                 assert_eq!(verified_rrs.verified_rrs.len(), 1);
 543
 544                 let now = SystemTime::now().duration_since(SystemTime::UNIX_EPOCH).unwrap().as_secs();
 545                 assert!(verified_rrs.valid_from < now);
 546                 assert!(verified_rrs.expires > now);
 547         }
 548
 549         #[cfg(feature = "tokio")]
 550         #[tokio::test]
 551         async fn test_cross_domain_cname_query_async() {
 552                 for resolver in ["1.1.1.1:53", "8.8.8.8:53", "9.9.9.9:53"] {
 553                         let sockaddr = resolver.to_socket_addrs().unwrap().next().unwrap();
 554                         let query_name = "wildcard.x_domain_cname_wild.dnssec_proof_tests.bitcoin.ninja.".try_into().unwrap();
 555                         let (proof, _) = build_txt_proof_async(sockaddr, &query_name).await.unwrap();
 556
 557                         let mut rrs = parse_rr_stream(&proof).unwrap();
 558                         rrs.shuffle(&mut rand::rngs::OsRng);
 559                         let verified_rrs = verify_rr_stream(&rrs).unwrap();
 560                         assert_eq!(verified_rrs.verified_rrs.len(), 2);
 561
 562                         let now = SystemTime::now().duration_since(SystemTime::UNIX_EPOCH).unwrap().as_secs();
 563                         assert!(verified_rrs.valid_from < now);
 564                         assert!(verified_rrs.expires > now);
 565
 566                         let resolved_rrs = verified_rrs.resolve_name(&query_name);
 567                         assert_eq!(resolved_rrs.len(), 1);
 568                         if let RR::Txt(txt) = &resolved_rrs[0] {
 569                                 assert_eq!(txt.name.as_str(), "matt.user._bitcoin-payment.mattcorallo.com.");
 570                                 assert!(txt.data.starts_with(b"bitcoin:"));
 571                         } else { panic!(); }
 572                 }
 573         }
 574
 575         #[cfg(feature = "tokio")]
 576         #[tokio::test]
 577         async fn test_dname_wildcard_query_async() {
 578                 for resolver in ["1.1.1.1:53", "8.8.8.8:53", "9.9.9.9:53"] {
 579                         let sockaddr = resolver.to_socket_addrs().unwrap().next().unwrap();
 580                         let query_name = "wildcard_a.wildcard_b.dname_test.dnssec_proof_tests.bitcoin.ninja.".try_into().unwrap();
 581                         let (proof, _) = build_txt_proof_async(sockaddr, &query_name).await.unwrap();
 582
 583                         let mut rrs = parse_rr_stream(&proof).unwrap();
 584                         rrs.shuffle(&mut rand::rngs::OsRng);
 585                         let verified_rrs = verify_rr_stream(&rrs).unwrap();
 586                         assert_eq!(verified_rrs.verified_rrs.len(), 3);
 587
 588                         let now = SystemTime::now().duration_since(SystemTime::UNIX_EPOCH).unwrap().as_secs();
 589                         assert!(verified_rrs.valid_from < now);
 590                         assert!(verified_rrs.expires > now);
 591
 592                         let resolved_rrs = verified_rrs.resolve_name(&query_name);
 593                         assert_eq!(resolved_rrs.len(), 1);
 594                         if let RR::Txt(txt) = &resolved_rrs[0] {
 595                                 assert_eq!(txt.name.as_str(), "cname.wildcard_test.dnssec_proof_tests.bitcoin.ninja.");
 596                                 assert_eq!(txt.data, b"wildcard_test");
 597                         } else { panic!(); }
 598                 }
 599         }
 600
 601 }