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

   1 //! Utilities to deserialize and validate RFC 9102 proofs
   2
   3 use alloc::vec::Vec;
   4 use alloc::vec;
   5 use core::cmp;
   6
   7 use ring::signature;
   8
   9 use crate::rr::*;
  10 use crate::ser::write_name;
  11
  12 /// Gets the trusted root anchors
  13 ///
  14 /// These are available at <https://data.iana.org/root-anchors/root-anchors.xml>
  15 pub fn root_hints() -> Vec<DS> {
  16         #[allow(unused_mut)]
  17         let mut res = vec![DS {
  18                 name: ".".try_into().unwrap(), key_tag: 19036, alg: 8, digest_type: 2,
  19                 digest: hex_lit::hex!("49AAC11D7B6F6446702E54A1607371607A1A41855200FD2CE1CDDE32F24E8FB5").to_vec(),
  20         }, DS {
  21                 name: ".".try_into().unwrap(), key_tag: 20326, alg: 8, digest_type: 2,
  22                 digest: hex_lit::hex!("E06D44B80B8F1D39A95C0B0D7C65D08458E880409BBC683457104237C7F8EC8D").to_vec(),
  23         }];
  24         // In tests, add the trust anchor from RFC 9102
  25         #[cfg(test)]
  26         res.push(DS {
  27                 name: ".".try_into().unwrap(), key_tag: 47005, alg: 13, digest_type: 2,
  28                 digest: hex_lit::hex!("2eb6e9f2480126691594d649a5a613de3052e37861634641bb568746f2ffc4d4").to_vec(),
  29         });
  30         res
  31 }
  32
  33 #[derive(Debug, PartialEq)]
  34 /// An error when validating DNSSEC signatures or other data
  35 pub enum ValidationError {
  36         /// An algorithm used in signing was not supported.
  37         ///
  38         /// In general DNS usage the resulting data should be used anyway, as we were able to verify
  39         /// that a zone wished to use the unsupported algorithm.
  40         ///
  41         /// However, in cases where signing is mandatory, this can be treated as an error.
  42         UnsupportedAlgorithm,
  43         /// The provided data was invalid or signatures did not validate.
  44         Invalid,
  45 }
  46
  47 pub(crate) fn bytes_to_rsa_pk<'a>(pubkey: &'a [u8])
  48 -> Result<signature::RsaPublicKeyComponents<&'a [u8]>, ()> {
  49         if pubkey.len() <= 3 { return Err(()); }
  50
  51         let mut pos = 0;
  52         let exponent_length;
  53         if pubkey[0] == 0 {
  54                 exponent_length = ((pubkey[1] as usize) << 8) | (pubkey[2] as usize);
  55                 pos += 3;
  56         } else {
  57                 exponent_length = pubkey[0] as usize;
  58                 pos += 1;
  59         }
  60
  61         if pubkey.len() <= pos + exponent_length { return Err(()); }
  62         Ok(signature::RsaPublicKeyComponents {
  63                 n: &pubkey[pos + exponent_length..],
  64                 e: &pubkey[pos..pos + exponent_length]
  65         })
  66 }
  67
  68 fn verify_rrsig<'a, RR: Record, Keys>(sig: &RRSig, dnskeys: Keys, mut records: Vec<&RR>)
  69 -> Result<(), ValidationError>
  70 where Keys: IntoIterator<Item = &'a DnsKey> {
  71         for record in records.iter() {
  72                 if sig.ty != record.ty() { return Err(ValidationError::Invalid); }
  73         }
  74         for dnskey in dnskeys.into_iter() {
  75                 if dnskey.key_tag() == sig.key_tag {
  76                         // Protocol must be 3, otherwise its not DNSSEC
  77                         if dnskey.protocol != 3 { continue; }
  78                         // The ZONE flag must be set if we're going to validate RRs with this key.
  79                         if dnskey.flags & 0b1_0000_0000 == 0 { continue; }
  80                         if dnskey.alg != sig.alg { continue; }
  81
  82                         let mut signed_data = Vec::with_capacity(2048);
  83                         signed_data.extend_from_slice(&sig.ty.to_be_bytes());
  84                         signed_data.extend_from_slice(&sig.alg.to_be_bytes());
  85                         signed_data.extend_from_slice(&sig.labels.to_be_bytes());
  86                         signed_data.extend_from_slice(&sig.orig_ttl.to_be_bytes());
  87                         signed_data.extend_from_slice(&sig.expiration.to_be_bytes());
  88                         signed_data.extend_from_slice(&sig.inception.to_be_bytes());
  89                         signed_data.extend_from_slice(&sig.key_tag.to_be_bytes());
  90                         write_name(&mut signed_data, &sig.key_name);
  91
  92                         records.sort();
  93
  94                         for record in records.iter() {
  95                                 let periods = record.name().as_str().chars().filter(|c| *c == '.').count();
  96                                 let labels = sig.labels.into();
  97                                 if periods != 1 && periods != labels {
  98                                         if periods < labels { return Err(ValidationError::Invalid); }
  99                                         let signed_name = record.name().as_str().splitn(periods - labels + 1, ".").last();
 100                                         debug_assert!(signed_name.is_some());
 101                                         if let Some(name) = signed_name {
 102                                                 signed_data.extend_from_slice(b"\x01*");
 103                                                 write_name(&mut signed_data, name);
 104                                         } else { return Err(ValidationError::Invalid); }
 105                                 } else {
 106                                         write_name(&mut signed_data, record.name());
 107                                 }
 108                                 signed_data.extend_from_slice(&record.ty().to_be_bytes());
 109                                 signed_data.extend_from_slice(&1u16.to_be_bytes()); // The INternet class
 110                                 signed_data.extend_from_slice(&sig.orig_ttl.to_be_bytes());
 111                                 record.write_u16_len_prefixed_data(&mut signed_data);
 112                         }
 113
 114                         match sig.alg {
 115                                 8|10 => {
 116                                         let alg = if sig.alg == 8 {
 117                                                 &signature::RSA_PKCS1_1024_8192_SHA256_FOR_LEGACY_USE_ONLY
 118                                         } else {
 119                                                 &signature::RSA_PKCS1_1024_8192_SHA512_FOR_LEGACY_USE_ONLY
 120                                         };
 121                                         bytes_to_rsa_pk(&dnskey.pubkey).map_err(|_| ValidationError::Invalid)?
 122                                                 .verify(alg, &signed_data, &sig.signature)
 123                                                 .map_err(|_| ValidationError::Invalid)?;
 124                                 },
 125                                 13|14 => {
 126                                         let alg = if sig.alg == 13 {
 127                                                 &signature::ECDSA_P256_SHA256_FIXED
 128                                         } else {
 129                                                 &signature::ECDSA_P384_SHA384_FIXED
 130                                         };
 131
 132                                         // Add 0x4 identifier to the ECDSA pubkey as expected by ring.
 133                                         let mut key = Vec::with_capacity(dnskey.pubkey.len() + 1);
 134                                         key.push(0x4);
 135                                         key.extend_from_slice(&dnskey.pubkey);
 136
 137                                         signature::UnparsedPublicKey::new(alg, &key)
 138                                                 .verify(&signed_data, &sig.signature)
 139                                                 .map_err(|_| ValidationError::Invalid)?;
 140                                 },
 141                                 15 => {
 142                                         signature::UnparsedPublicKey::new(&signature::ED25519, &dnskey.pubkey)
 143                                                 .verify(&signed_data, &sig.signature)
 144                                                 .map_err(|_| ValidationError::Invalid)?;
 145                                 },
 146                                 _ => return Err(ValidationError::UnsupportedAlgorithm),
 147                         }
 148
 149                         return Ok(());
 150                 }
 151         }
 152         Err(ValidationError::Invalid)
 153 }
 154
 155 fn verify_dnskey_rrsig<'a, T, I>(sig: &RRSig, dses: T, records: Vec<&DnsKey>)
 156 -> Result<(), ValidationError>
 157 where T: IntoIterator<IntoIter = I>, I: Iterator<Item = &'a DS> + Clone {
 158         let mut validated_dnskeys = Vec::with_capacity(records.len());
 159         let dses = dses.into_iter();
 160
 161         let mut had_known_digest_type = false;
 162         let mut had_ds = false;
 163         for ds in dses.clone() {
 164                 had_ds = true;
 165                 if ds.digest_type == 2 || ds.digest_type == 4 {
 166                         had_known_digest_type = true;
 167                         break;
 168                 }
 169         }
 170         if !had_ds { return Err(ValidationError::Invalid); }
 171         if !had_known_digest_type { return Err(ValidationError::UnsupportedAlgorithm); }
 172
 173         for dnskey in records.iter() {
 174                 for ds in dses.clone() {
 175                         if ds.digest_type != 2 && ds.digest_type != 4 { continue; }
 176                         if ds.alg != dnskey.alg { continue; }
 177                         if dnskey.key_tag() == ds.key_tag {
 178                                 let alg = match ds.digest_type {
 179                                         2 => &ring::digest::SHA256,
 180                                         4 => &ring::digest::SHA384,
 181                                         _ => continue,
 182                                 };
 183                                 let mut ctx = ring::digest::Context::new(alg);
 184                                 write_name(&mut ctx, &dnskey.name);
 185                                 ctx.update(&dnskey.flags.to_be_bytes());
 186                                 ctx.update(&dnskey.protocol.to_be_bytes());
 187                                 ctx.update(&dnskey.alg.to_be_bytes());
 188                                 ctx.update(&dnskey.pubkey);
 189                                 let hash = ctx.finish();
 190                                 if hash.as_ref() == &ds.digest {
 191                                         validated_dnskeys.push(*dnskey);
 192                                         break;
 193                                 }
 194                         }
 195                 }
 196         }
 197         verify_rrsig(sig, validated_dnskeys.iter().map(|k| *k), records)
 198 }
 199
 200 /// Given a set of [`RR`]s, [`verify_rr_stream`] checks what it can and returns the set of
 201 /// non-[`RRSig`]/[`DnsKey`]/[`DS`] records which it was able to verify using this struct.
 202 ///
 203 /// It also contains
 204 #[derive(Debug, Clone)]
 205 pub struct VerifiedRRStream<'a> {
 206         /// The set of verified [`RR`]s.
 207         ///
 208         /// These are not valid unless the current UNIX time is between [`Self::valid_from`] and
 209         /// [`Self::expiration`].
 210         pub verified_rrs: Vec<&'a RR>,
 211         /// The latest [`RRSig::inception`] of all the [`RRSig`]s validated to verify
 212         /// [`Self::verified_rrs`].
 213         ///
 214         /// Any records in [`Self::verified_rrs`] should not be considered valid unless this is before
 215         /// the current UNIX time.
 216         ///
 217         /// While the field here is a u64, the algorithm used to identify rollovers will fail in 2133.
 218         pub valid_from: u64,
 219         /// The earliest [`RRSig::expiration`] of all the [`RRSig`]s validated to verify
 220         /// [`Self::verified_rrs`].
 221         ///
 222         /// Any records in [`Self::verified_rrs`] should not be considered valid unless this is after
 223         /// the current UNIX time.
 224         ///
 225         /// While the field here is a u64, the algorithm used to identify rollovers will fail in 2133.
 226         pub expires: u64,
 227         /// The minimum [`RRSig::orig_ttl`] of all the [`RRSig`]s validated to verify
 228         /// [`Self::verified_rrs`].
 229         ///
 230         /// Any caching of [`Self::verified_rrs`] must not last longer than this value, in seconds.
 231         pub max_cache_ttl: u32,
 232 }
 233
 234 fn resolve_time(time: u32) -> u64 {
 235         // RFC 2065 was published in January 1997, so we arbitrarily use that as a cutoff and assume
 236         // any timestamps before then are actually past 2106 instead.
 237         // We ignore leap years for simplicity.
 238         if time < 60*60*24*365*27 {
 239                 (time as u64) + (u32::MAX as u64)
 240         } else {
 241                 time.into()
 242         }
 243 }
 244
 245 /// Verifies the given set of resource records.
 246 ///
 247 /// Given a set of arbitrary records, this attempts to validate DNSSEC data from the [`root_hints`]
 248 /// through to any supported non-DNSSEC record types.
 249 ///
 250 /// All records which could be validated are returned, though if an error is found validating any
 251 /// contained record, only `Err` will be returned.
 252 ///
 253 /// You MUST check that the current UNIX time is between [`VerifiedRRStream::latest_inception`] and
 254 /// [`VerifiedRRStream::earliest_expiry`].
 255 pub fn verify_rr_stream<'a>(inp: &'a [RR]) -> Result<VerifiedRRStream<'a>, ValidationError> {
 256         let mut zone = ".";
 257         let mut res = Vec::new();
 258         let mut pending_ds_sets = Vec::with_capacity(1);
 259         let mut latest_inception = 0;
 260         let mut earliest_expiry = u64::MAX;
 261         let mut min_ttl = u32::MAX;
 262         'next_zone: while zone == "." || !pending_ds_sets.is_empty() {
 263                 let mut found_unsupported_alg = false;
 264                 let next_ds_set;
 265                 if let Some((next_zone, ds_set)) = pending_ds_sets.pop() {
 266                         next_ds_set = Some(ds_set);
 267                         zone = next_zone;
 268                 } else {
 269                         debug_assert_eq!(zone, ".");
 270                         next_ds_set = None;
 271                 }
 272
 273                 for rrsig in inp.iter()
 274                         .filter_map(|rr| if let RR::RRSig(sig) = rr { Some(sig) } else { None })
 275                         .filter(|rrsig| rrsig.name.as_str() == zone && rrsig.ty == DnsKey::TYPE)
 276                 {
 277                         let dnskeys = inp.iter()
 278                                 .filter_map(|rr| if let RR::DnsKey(dnskey) = rr { Some(dnskey) } else { None })
 279                                 .filter(move |dnskey| dnskey.name.as_str() == zone);
 280                         let dnskeys_verified = if zone == "." {
 281                                 verify_dnskey_rrsig(rrsig, &root_hints(), dnskeys.clone().collect())
 282                         } else {
 283                                 debug_assert!(next_ds_set.is_some());
 284                                 if next_ds_set.is_none() { break 'next_zone; }
 285                                 verify_dnskey_rrsig(rrsig, next_ds_set.clone().unwrap(), dnskeys.clone().collect())
 286                         };
 287                         if dnskeys_verified.is_ok() {
 288                                 latest_inception = cmp::max(latest_inception, resolve_time(rrsig.inception));
 289                                 earliest_expiry = cmp::min(earliest_expiry, resolve_time(rrsig.expiration));
 290                                 min_ttl = cmp::min(min_ttl, rrsig.orig_ttl);
 291                                 for rrsig in inp.iter()
 292                                         .filter_map(|rr| if let RR::RRSig(sig) = rr { Some(sig) } else { None })
 293                                         .filter(move |rrsig| rrsig.key_name.as_str() == zone && rrsig.ty != DnsKey::TYPE)
 294                                 {
 295                                         if !rrsig.name.ends_with(zone) { return Err(ValidationError::Invalid); }
 296                                         let signed_records = inp.iter()
 297                                                 .filter(|rr| rr.name() == &rrsig.name && rr.ty() == rrsig.ty);
 298                                         verify_rrsig(rrsig, dnskeys.clone(), signed_records.clone().collect())?;
 299                                         latest_inception = cmp::max(latest_inception, resolve_time(rrsig.inception));
 300                                         earliest_expiry = cmp::min(earliest_expiry, resolve_time(rrsig.expiration));
 301                                         min_ttl = cmp::min(min_ttl, rrsig.orig_ttl);
 302                                         match rrsig.ty {
 303                                                 // RRSigs shouldn't cover child `DnsKey`s or other `RRSig`s
 304                                                 RRSig::TYPE|DnsKey::TYPE => return Err(ValidationError::Invalid),
 305                                                 DS::TYPE => {
 306                                                         if !pending_ds_sets.iter().any(|(pending_zone, _)| pending_zone == &rrsig.name.as_str()) {
 307                                                                 pending_ds_sets.push((
 308                                                                         &rrsig.name,
 309                                                                         signed_records.filter_map(|rr|
 310                                                                                 if let RR::DS(ds) = rr { Some(ds) }
 311                                                                                 else { debug_assert!(false, "We already filtered by type"); None })
 312                                                                 ));
 313                                                         }
 314                                                 },
 315                                                 _ => {
 316                                                         for record in signed_records {
 317                                                                 if !res.contains(&record) { res.push(record); }
 318                                                         }
 319                                                 },
 320                                         }
 321                                 }
 322                                 continue 'next_zone;
 323                         } else if dnskeys_verified == Err(ValidationError::UnsupportedAlgorithm) {
 324                                 // There may be redundant signatures by different keys, where one we don't supprt
 325                                 // and another we do. Ignore ones we don't support, but if there are no more,
 326                                 // return UnsupportedAlgorithm
 327                                 found_unsupported_alg = true;
 328                         } else {
 329                                 // We don't explicitly handle invalid signatures here, instead we move on to the
 330                                 // next RRSig (if there is one) and return `Invalid` if no `RRSig`s match.
 331                         }
 332                 }
 333                 // No RRSigs were able to verify our DnsKey set
 334                 if found_unsupported_alg {
 335                         return Err(ValidationError::UnsupportedAlgorithm);
 336                 } else {
 337                         return Err(ValidationError::Invalid);
 338                 }
 339         }
 340         if res.is_empty() { Err(ValidationError::Invalid) }
 341         else if latest_inception >= earliest_expiry { Err(ValidationError::Invalid) }
 342         else {
 343                 Ok(VerifiedRRStream {
 344                         verified_rrs: res, valid_from: latest_inception, expires: earliest_expiry,
 345                         max_cache_ttl: min_ttl,
 346                 })
 347         }
 348 }
 349
 350 #[cfg(test)]
 351 mod tests {
 352         #![allow(deprecated)]
 353
 354         use super::*;
 355
 356         use alloc::borrow::ToOwned;
 357
 358         use crate::ser::{parse_rr_stream, write_rr};
 359
 360         use hex_conservative::FromHex;
 361         use rand::seq::SliceRandom;
 362
 363         fn root_dnskey() -> (Vec<DnsKey>, Vec<RR>) {
 364                 let dnskeys = vec![DnsKey {
 365                         name: ".".try_into().unwrap(), flags: 256, protocol: 3, alg: 8,
 366                         pubkey: base64::decode("AwEAAentCcIEndLh2QSK+pHFq/PkKCwioxt75d7qNOUuTPMo0Fcte/NbwDPbocvbZ/eNb5RV/xQdapaJASQ/oDLsqzD0H1+JkHNuuKc2JLtpMxg4glSE4CnRXT2CnFTW5IwOREL+zeqZHy68OXy5ngW5KALbevRYRg/q2qFezRtCSQ0knmyPwgFsghVYLKwi116oxwEU5yZ6W7npWMxt5Z+Qs8diPNWrS5aXLgJtrWUGIIuFfuZwXYziGRP/z3o1EfMo9zZU19KLopkoLXX7Ls/diCXdSEdJXTtFA8w0/OKQviuJebfKscoElCTswukVZ1VX5gbaFEo2xWhHJ9Uo63wYaTk=").unwrap(),
 367                 }, DnsKey {
 368                         name: ".".try_into().unwrap(), flags: 257, protocol: 3, alg: 8,
 369                         pubkey: base64::decode("AwEAAaz/tAm8yTn4Mfeh5eyI96WSVexTBAvkMgJzkKTOiW1vkIbzxeF3+/4RgWOq7HrxRixHlFlExOLAJr5emLvN7SWXgnLh4+B5xQlNVz8Og8kvArMtNROxVQuCaSnIDdD5LKyWbRd2n9WGe2R8PzgCmr3EgVLrjyBxWezF0jLHwVN8efS3rCj/EWgvIWgb9tarpVUDK/b58Da+sqqls3eNbuv7pr+eoZG+SrDK6nWeL3c6H5Apxz7LjVc1uTIdsIXxuOLYA4/ilBmSVIzuDWfdRUfhHdY6+cn8HFRm+2hM8AnXGXws9555KrUB5qihylGa8subX2Nn6UwNR1AkUTV74bU=").unwrap(),
 370                 }];
 371                 let dnskey_rrsig = RRSig {
 372                         name: ".".try_into().unwrap(), ty: DnsKey::TYPE, alg: 8, labels: 0, orig_ttl: 172800,
 373                         expiration: 1708473600, inception: 1706659200, key_tag: 20326, key_name: ".".try_into().unwrap(),
 374                         signature: base64::decode("ZO8LbjtwAiVkkBzOnGbiI/3ilGUPmmJpagsLSBVbIZRG6o/8a+hUZpIPTvk5ERZ1rAW4x0YxKAU8qtaHQpKIp3qYA6u97DYytVD7RdtXKHmGYAvR6QbD5eVTkCw1Sz705rJxbwt6+YM5OBweSUAy5Glo6JSQPDQwRDwj/bV2fLRhJbvfsBgxqaXJA0SaE/ceyvK8gB2NIaguTJNrztr2TENrHxi86OKOuHYDHthOW0TFoPfr19qj/P2eEC6dYniTVovUwHT7e+Hqrb05dJF4mI4ZjaIb5mFf8i5RehT1aRlnb3CLiwJ01bEjrRBo3xUn5I3PkCnglHhx3EvkO73OzA==").unwrap(),
 375                 };
 376                 let root_hints = root_hints();
 377                 verify_dnskey_rrsig(&dnskey_rrsig, &root_hints, dnskeys.iter().collect()).unwrap();
 378                 let rrs = vec![dnskeys[0].clone().into(), dnskeys[1].clone().into(), dnskey_rrsig.into()];
 379                 (dnskeys, rrs)
 380         }
 381
 382         fn com_dnskey() -> (Vec<DnsKey>, Vec<RR>) {
 383                 let root_dnskeys = root_dnskey().0;
 384                 let mut com_ds = vec![DS {
 385                         name: "com.".try_into().unwrap(), key_tag: 19718, alg: 13, digest_type: 2,
 386                         digest: Vec::from_hex("8ACBB0CD28F41250A80A491389424D341522D946B0DA0C0291F2D3D771D7805A").unwrap(),
 387                 }];
 388                 let ds_rrsig = RRSig {
 389                         name: "com.".try_into().unwrap(), ty: DS::TYPE, alg: 8, labels: 1, orig_ttl: 86400,
 390                         expiration: 1708189200, inception: 1707062400, key_tag: 30903, key_name: ".".try_into().unwrap(),
 391                         signature: base64::decode("vwMOBBwqRBdlmGZB+0FKfyMSignEtpYW9sD4TzPW2E+wdbF7O7epR5cmKmvcv0RUJdM0dGC/QmhCfgf/yqw1Xp7TpmPaYzaruW70hjGXZJO2nY3G6stUVe4S7lM2CzHL7nbbpaB5B+iSu6Ua9dZ+nyKrxfB7855HBLCLrHrkMGxWQiEPTallXXS8tEM1Y2XrsuzAQu2vZ2D2ClhFspFbPwwOdw+G6+NsZ8PnIfTkCj6DuKcgbdxjmGaYmw/6hVt9OU3kGCOBaJaEy4LrD8Kwzfu4S7axMwTKP4y4c5Y/E4k/mVAW0cuUtv549HaDfD2V0CvW1bDl6PqRkOiVsqM/lA==").unwrap(),
 392                 };
 393                 verify_rrsig(&ds_rrsig, &root_dnskeys, com_ds.iter().collect()).unwrap();
 394                 let dnskeys = vec![DnsKey {
 395                         name: "com.".try_into().unwrap(), flags: 256, protocol: 3, alg: 13,
 396                         pubkey: base64::decode("5i9qjJgyH+9MBz7VO269/srLQB/xRRllyUoVq8oLBZshPe4CGzDSFGnXAM3L/QPzB9ULpJuuy7jcxmBZ5Ebo7A==").unwrap(),
 397                 }, DnsKey {
 398                         name: "com.".try_into().unwrap(), flags: 257, protocol: 3, alg: 13,
 399                         pubkey: base64::decode("tx8EZRAd2+K/DJRV0S+hbBzaRPS/G6JVNBitHzqpsGlz8huE61Ms9ANe6NSDLKJtiTBqfTJWDAywEp1FCsEINQ==").unwrap(),
 400                 }];
 401                 let dnskey_rrsig = RRSig {
 402                         name: "com.".try_into().unwrap(), ty: DnsKey::TYPE, alg: 13, labels: 1, orig_ttl: 86400,
 403                         expiration: 1707750155, inception: 1706453855, key_tag: 19718, key_name: "com.".try_into().unwrap(),
 404                         signature: base64::decode("ZFGChM7QfJt0QSqVWerWnG5pMjpL1pXyJAmuHe8dHI/olmaNCxm+mqNHv9i3AploFY6JoNtiHmeBiC6zuFj/ZQ==").unwrap(),
 405                 };
 406                 verify_dnskey_rrsig(&dnskey_rrsig, &com_ds, dnskeys.iter().collect()).unwrap();
 407                 let rrs = vec![com_ds.pop().unwrap().into(), ds_rrsig.into(),
 408                         dnskeys[0].clone().into(), dnskeys[1].clone().into(), dnskey_rrsig.into()];
 409                 (dnskeys, rrs)
 410         }
 411
 412         fn mattcorallo_dnskey() -> (Vec<DnsKey>, Vec<RR>) {
 413                 let com_dnskeys = com_dnskey().0;
 414                 let mut mattcorallo_ds = vec![DS {
 415                         name: "mattcorallo.com.".try_into().unwrap(), key_tag: 25630, alg: 13, digest_type: 2,
 416                         digest: Vec::from_hex("DC608CA62BE89B3B9DB1593F9A59930D24FBA79D486E19C88A7792711EC00735").unwrap(),
 417                 }];
 418                 let ds_rrsig = RRSig {
 419                         name: "mattcorallo.com.".try_into().unwrap(), ty: DS::TYPE, alg: 13, labels: 2, orig_ttl: 86400,
 420                         expiration: 1707631252, inception: 1707022252, key_tag: 4534, key_name: "com.".try_into().unwrap(),
 421                         signature: base64::decode("M7Fk+CjfLz6hRsY5iSuw5bwc2OqlS3XtKH8FDs7lcbhEiR63n+DzOF0I8L+3k06SXFnE89uuofQECzWmAyef6Q==").unwrap(),
 422                 };
 423                 verify_rrsig(&ds_rrsig, &com_dnskeys, mattcorallo_ds.iter().collect()).unwrap();
 424                 let dnskeys = vec![DnsKey {
 425                         name: "mattcorallo.com.".try_into().unwrap(), flags: 257, protocol: 3, alg: 13,
 426                         pubkey: base64::decode("8BP51Etiu4V6cHvGCYqwNqCip4pvHChjEgkgG4zpdDvO9YRcTGuV/p71hAUut2/qEdxqXfUOT/082BJ/Z089DA==").unwrap(),
 427                 }, DnsKey {
 428                         name: "mattcorallo.com.".try_into().unwrap(), flags: 256, protocol: 3, alg: 13,
 429                         pubkey: base64::decode("AhUlQ8qk7413R0m4zKfTDHb/FQRlKag+ncGXxNxT+qTzSZTb9E5IGjo9VCEp6+IMqqpkd4GrXpN9AzDvlcU9Ig==").unwrap(),
 430                 }];
 431                 let dnskey_rrsig = RRSig {
 432                         name: "mattcorallo.com.".try_into().unwrap(), ty: DnsKey::TYPE, alg: 13, labels: 2, orig_ttl: 604800,
 433                         expiration: 1708278650, inception: 1707063650, key_tag: 25630, key_name: "mattcorallo.com.".try_into().unwrap(),
 434                         signature: base64::decode("nyVDwG+la8d5dyWgB7m+H3BQwCvTWLQ/kAqNruMzdLmn9B3VC9u/rvM/ortEu0WPbA1FZWJbRKpF1Ohkj3ltNw==").unwrap(),
 435                 };
 436                 verify_dnskey_rrsig(&dnskey_rrsig, &mattcorallo_ds, dnskeys.iter().collect()).unwrap();
 437                 let rrs = vec![mattcorallo_ds.pop().unwrap().into(), ds_rrsig.into(),
 438                         dnskeys[0].clone().into(), dnskeys[1].clone().into(), dnskey_rrsig.into()];
 439                 (dnskeys, rrs)
 440         }
 441
 442         fn mattcorallo_txt_record() -> (Txt, RRSig) {
 443                 let txt_resp = Txt {
 444                         name: "matt.user._bitcoin-payment.mattcorallo.com.".try_into().unwrap(),
 445                         data: "bitcoin:?b12=lno1qsgqmqvgm96frzdg8m0gc6nzeqffvzsqzrxqy32afmr3jn9ggkwg3egfwch2hy0l6jut6vfd8vpsc3h89l6u3dm4q2d6nuamav3w27xvdmv3lpgklhg7l5teypqz9l53hj7zvuaenh34xqsz2sa967yzqkylfu9xtcd5ymcmfp32h083e805y7jfd236w9afhavqqvl8uyma7x77yun4ehe9pnhu2gekjguexmxpqjcr2j822xr7q34p078gzslf9wpwz5y57alxu99s0z2ql0kfqvwhzycqq45ehh58xnfpuek80hw6spvwrvttjrrq9pphh0dpydh06qqspp5uq4gpyt6n9mwexde44qv7lstzzq60nr40ff38u27un6y53aypmx0p4qruk2tf9mjwqlhxak4znvna5y".to_owned().into_bytes(),
 446                 };
 447                 let txt_rrsig = RRSig {
 448                         name: "matt.user._bitcoin-payment.mattcorallo.com.".try_into().unwrap(),
 449                         ty: Txt::TYPE, alg: 13, labels: 5, orig_ttl: 3600, expiration: 1708123318,
 450                         inception: 1706908318, key_tag: 47959, key_name: "mattcorallo.com.".try_into().unwrap(),
 451                         signature: base64::decode("mgU6iwyMWO0w9nj2Gmt1+RmaIJIU3KO7DWVZiCD1bmU9e9zNefXCtnWOC2HtwjUsn/QYkWluvuSfYpBrt1IjpQ==").unwrap(),
 452                 };
 453                 (txt_resp, txt_rrsig)
 454         }
 455
 456         fn matcorallo_dnskey() -> (Vec<DnsKey>, Vec<RR>) {
 457                 let com_dnskeys = com_dnskey().0;
 458                 let mut matcorallo_ds = vec![DS {
 459                         name: "matcorallo.com.".try_into().unwrap(), key_tag: 24930, alg: 13, digest_type: 2,
 460                         digest: Vec::from_hex("693E990CBB1CE1095E387092D3C04BCE907C008891F32A88D41D3ECB129E5E23").unwrap(),
 461                 }];
 462                 let ds_rrsig = RRSig {
 463                         name: "matcorallo.com.".try_into().unwrap(), ty: DS::TYPE, alg: 13, labels: 2, orig_ttl: 86400,
 464                         expiration: 1707628636, inception: 1707019636, key_tag: 4534, key_name: "com.".try_into().unwrap(),
 465                         signature: base64::decode("l9b+DhtnJSIzR6y4Bwx+0L9kep77UNCBoTg74RTSL6oMrQd8w4OobHxzwDyXqnLfyxVP18V+AnQp4DdJ2nUW1g==").unwrap(),
 466                 };
 467                 verify_rrsig(&ds_rrsig, &com_dnskeys, matcorallo_ds.iter().collect()).unwrap();
 468                 let dnskeys = vec![DnsKey {
 469                         name: "matcorallo.com.".try_into().unwrap(), flags: 257, protocol: 3, alg: 13,
 470                         pubkey: base64::decode("pfO3ow3SrKhLS7AMEi3b5W9P28nCOB9vryxfSXhqMcXFP1x9V4xAt0/JLr0zNodsqRD/8d9Yhu4Wf3hnSlaavw==").unwrap(),
 471                 }, DnsKey {
 472                         name: "matcorallo.com.".try_into().unwrap(), flags: 256, protocol: 3, alg: 13,
 473                         pubkey: base64::decode("OO6LQTV1mnRsFgn6YQoyeo/SDqS3eajfVv8WGQVnuSYO/bTS9St1tJiox2fgU6wRWDU3chhjz1Pj0unKUAQKig==").unwrap(),
 474                 }];
 475                 let dnskey_rrsig = RRSig {
 476                         name: "matcorallo.com.".try_into().unwrap(), ty: DnsKey::TYPE, alg: 13, labels: 2, orig_ttl: 604800,
 477                         expiration: 1708309135, inception: 1707094135, key_tag: 24930, key_name: "matcorallo.com.".try_into().unwrap(),
 478                         signature: base64::decode("2MKg3bTn9zf4ThwCoKRFadqD6l1D6SuLksRieKxFC0QQnzUOCRgZSK2/IlT0DMEoM0+mGrJZo7UG79UILMGUyg==").unwrap(),
 479                 };
 480                 verify_dnskey_rrsig(&dnskey_rrsig, &matcorallo_ds, dnskeys.iter().collect()).unwrap();
 481                 let rrs = vec![matcorallo_ds.pop().unwrap().into(), ds_rrsig.into(),
 482                         dnskeys[0].clone().into(), dnskeys[1].clone().into(), dnskey_rrsig.into()];
 483                 (dnskeys, rrs)
 484         }
 485
 486         fn matcorallo_txt_record() -> (Txt, RRSig) {
 487                 let txt_resp = Txt {
 488                         name: "txt_test.matcorallo.com.".try_into().unwrap(),
 489                         data: "dnssec_prover_test".to_owned().into_bytes(),
 490                 };
 491                 let txt_rrsig = RRSig {
 492                         name: "txt_test.matcorallo.com.".try_into().unwrap(),
 493                         ty: Txt::TYPE, alg: 13, labels: 3, orig_ttl: 30, expiration: 1708319203,
 494                         inception: 1707104203, key_tag: 34530, key_name: "matcorallo.com.".try_into().unwrap(),
 495                         signature: base64::decode("4vaE5Jex2VvIT39JpuMNT7Ds7O0OfzTik5f8WcRRxO0IJnGAO16syAsNUkNkNqsMYknnjHDF0lI4agszgzdpsw==").unwrap(),
 496                 };
 497                 (txt_resp, txt_rrsig)
 498         }
 499
 500         fn matcorallo_cname_record() -> (CName, RRSig) {
 501                 let cname_resp = CName {
 502                         name: "cname_test.matcorallo.com.".try_into().unwrap(),
 503                         canonical_name: "txt_test.matcorallo.com.".try_into().unwrap(),
 504                 };
 505                 let cname_rrsig = RRSig {
 506                         name: "cname_test.matcorallo.com.".try_into().unwrap(),
 507                         ty: CName::TYPE, alg: 13, labels: 3, orig_ttl: 30, expiration: 1708319203,
 508                         inception: 1707104203, key_tag: 34530, key_name: "matcorallo.com.".try_into().unwrap(),
 509                         signature: base64::decode("5HIrmEotbVb95umE6SX3NrPboKsthdcY8b7DdaYQZzm0Nj5m2VgcfOmEPJYS8o1xE4GvGGF4sdfSy3Uw7TibBg==").unwrap(),
 510                 };
 511                 (cname_resp, cname_rrsig)
 512         }
 513
 514         fn matcorallo_wildcard_record() -> (Txt, RRSig) {
 515                 let txt_resp = Txt {
 516                         name: "test.wildcard_test.matcorallo.com.".try_into().unwrap(),
 517                         data: "wildcard_test".to_owned().into_bytes(),
 518                 };
 519                 let txt_rrsig = RRSig {
 520                         name: "test.wildcard_test.matcorallo.com.".try_into().unwrap(),
 521                         ty: Txt::TYPE, alg: 13, labels: 3, orig_ttl: 30, expiration: 1708321778,
 522                         inception: 1707106778, key_tag: 34530, key_name: "matcorallo.com.".try_into().unwrap(),
 523                         signature: base64::decode("vdnXunPY4CnbW/BL8VOOR9o33+dqyKA/4h+u5VM7NjB30Shp8L8gL5UwE0k7TKRNgHC8j3TqEPEmNMIHz87Z4Q==").unwrap(),
 524                 };
 525                 (txt_resp, txt_rrsig)
 526         }
 527
 528         fn matcorallo_cname_wildcard_record() -> (CName, RRSig, Txt, RRSig) {
 529                 let cname_resp = CName {
 530                         name: "test.cname_wildcard_test.matcorallo.com.".try_into().unwrap(),
 531                         canonical_name: "cname.wildcard_test.matcorallo.com.".try_into().unwrap(),
 532                 };
 533                 let txt_resp = Txt {
 534                         name: "cname.wildcard_test.matcorallo.com.".try_into().unwrap(),
 535                         data: "wildcard_test".to_owned().into_bytes(),
 536                 };
 537                 let cname_rrsig = RRSig {
 538                         name: "test.cname_wildcard_test.matcorallo.com.".try_into().unwrap(),
 539                         ty: CName::TYPE, alg: 13, labels: 3, orig_ttl: 30, expiration: 1708322050,
 540                         inception: 1707107050, key_tag: 34530, key_name: "matcorallo.com.".try_into().unwrap(),
 541                         signature: base64::decode("JfJuSemF5dtQYxEw6eKL4IRP8BaDt6FtbtdpZ6HjODTDflhKQRhBEbwT7kwceKPAq18q5sWHFV1bMTqE/F3WLw==").unwrap(),
 542                 };
 543                 let txt_rrsig = RRSig {
 544                         name: "cname.wildcard_test.matcorallo.com.".try_into().unwrap(),
 545                         ty: Txt::TYPE, alg: 13, labels: 3, orig_ttl: 30, expiration: 1708321778,
 546                         inception: 1707106778, key_tag: 34530, key_name: "matcorallo.com.".try_into().unwrap(),
 547                         signature: base64::decode("vdnXunPY4CnbW/BL8VOOR9o33+dqyKA/4h+u5VM7NjB30Shp8L8gL5UwE0k7TKRNgHC8j3TqEPEmNMIHz87Z4Q==").unwrap(),
 548                 };
 549                 (cname_resp, cname_rrsig, txt_resp, txt_rrsig)
 550         }
 551
 552         fn matcorallo_txt_sort_edge_cases_records() -> (Vec<Txt>, RRSig) {
 553                 let txts = vec![Txt {
 554                         name: "txt_sort_order.matcorallo.com.".try_into().unwrap(),
 555                         data: "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaab".to_owned().into_bytes(),
 556                 }, Txt {
 557                         name: "txt_sort_order.matcorallo.com.".try_into().unwrap(),
 558                         data: "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa".to_owned().into_bytes(),
 559                 }, Txt {
 560                         name: "txt_sort_order.matcorallo.com.".try_into().unwrap(),
 561                         data: "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaabaa".to_owned().into_bytes(),
 562                 }, Txt {
 563                         name: "txt_sort_order.matcorallo.com.".try_into().unwrap(),
 564                         data: "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaba".to_owned().into_bytes(),
 565                 }, Txt {
 566                         name: "txt_sort_order.matcorallo.com.".try_into().unwrap(),
 567                         data: "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa".to_owned().into_bytes(),
 568                 }, Txt {
 569                         name: "txt_sort_order.matcorallo.com.".try_into().unwrap(),
 570                         data: "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaab".to_owned().into_bytes(),
 571                 }, Txt {
 572                         name: "txt_sort_order.matcorallo.com.".try_into().unwrap(),
 573                         data: "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa".to_owned().into_bytes(),
 574                 }, Txt {
 575                         name: "txt_sort_order.matcorallo.com.".try_into().unwrap(),
 576                         data: "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaba".to_owned().into_bytes(),
 577                 }];
 578                 let rrsig = RRSig {
 579                         name: "txt_sort_order.matcorallo.com.".try_into().unwrap(),
 580                         ty: Txt::TYPE, alg: 13, labels: 3, orig_ttl: 30, expiration: 1708449632,
 581                         inception: 1707234632, key_tag: 34530, key_name: "matcorallo.com.".try_into().unwrap(),
 582                         signature: base64::decode("elAhELwzkGpUMvzeiYZpg1+yRFPjmOeEd1ir1vYx2Dku9kzsXmAlejOYDPWdaJ6ekvHdMejCN/MtyI+iFAYqsw==").unwrap(),
 583                 };
 584                 (txts, rrsig)
 585         }
 586
 587         #[test]
 588         fn check_txt_record_a() {
 589                 let dnskeys = mattcorallo_dnskey().0;
 590                 let (txt, txt_rrsig) = mattcorallo_txt_record();
 591                 let txt_resp = [txt];
 592                 verify_rrsig(&txt_rrsig, &dnskeys, txt_resp.iter().collect()).unwrap();
 593         }
 594
 595         #[test]
 596         fn check_single_txt_proof() {
 597                 let mut rr_stream = Vec::new();
 598                 for rr in root_dnskey().1 { write_rr(&rr, 1, &mut rr_stream); }
 599                 for rr in com_dnskey().1 { write_rr(&rr, 1, &mut rr_stream); }
 600                 for rr in mattcorallo_dnskey().1 { write_rr(&rr, 1, &mut rr_stream); }
 601                 let (txt, txt_rrsig) = mattcorallo_txt_record();
 602                 for rr in [RR::Txt(txt), RR::RRSig(txt_rrsig)] { write_rr(&rr, 1, &mut rr_stream); }
 603
 604                 let mut rrs = parse_rr_stream(&rr_stream).unwrap();
 605                 rrs.shuffle(&mut rand::rngs::OsRng);
 606                 let verified_rrs = verify_rr_stream(&rrs).unwrap();
 607                 assert_eq!(verified_rrs.verified_rrs.len(), 1);
 608                 if let RR::Txt(txt) = &verified_rrs.verified_rrs[0] {
 609                         assert_eq!(txt.name.as_str(), "matt.user._bitcoin-payment.mattcorallo.com.");
 610                         assert_eq!(txt.data, b"bitcoin:?b12=lno1qsgqmqvgm96frzdg8m0gc6nzeqffvzsqzrxqy32afmr3jn9ggkwg3egfwch2hy0l6jut6vfd8vpsc3h89l6u3dm4q2d6nuamav3w27xvdmv3lpgklhg7l5teypqz9l53hj7zvuaenh34xqsz2sa967yzqkylfu9xtcd5ymcmfp32h083e805y7jfd236w9afhavqqvl8uyma7x77yun4ehe9pnhu2gekjguexmxpqjcr2j822xr7q34p078gzslf9wpwz5y57alxu99s0z2ql0kfqvwhzycqq45ehh58xnfpuek80hw6spvwrvttjrrq9pphh0dpydh06qqspp5uq4gpyt6n9mwexde44qv7lstzzq60nr40ff38u27un6y53aypmx0p4qruk2tf9mjwqlhxak4znvna5y");
 611                 } else { panic!(); }
 612                 assert_eq!(verified_rrs.valid_from, 1707063650); // The TXT record RRSig was created last
 613                 assert_eq!(verified_rrs.expires, 1707631252); // The mattcorallo.com DS RRSig expires first
 614                 assert_eq!(verified_rrs.max_cache_ttl, 3600); // The TXT record had the shortest TTL
 615         }
 616
 617         #[test]
 618         fn check_txt_record_b() {
 619                 let dnskeys = matcorallo_dnskey().0;
 620                 let (txt, txt_rrsig) = matcorallo_txt_record();
 621                 let txt_resp = [txt];
 622                 verify_rrsig(&txt_rrsig, &dnskeys, txt_resp.iter().collect()).unwrap();
 623         }
 624
 625         #[test]
 626         fn check_cname_record() {
 627                 let dnskeys = matcorallo_dnskey().0;
 628                 let (cname, cname_rrsig) = matcorallo_cname_record();
 629                 let cname_resp = [cname];
 630                 verify_rrsig(&cname_rrsig, &dnskeys, cname_resp.iter().collect()).unwrap();
 631         }
 632
 633         #[test]
 634         fn check_multi_zone_proof() {
 635                 let mut rr_stream = Vec::new();
 636                 for rr in root_dnskey().1 { write_rr(&rr, 1, &mut rr_stream); }
 637                 for rr in com_dnskey().1 { write_rr(&rr, 1, &mut rr_stream); }
 638                 for rr in mattcorallo_dnskey().1 { write_rr(&rr, 1, &mut rr_stream); }
 639                 let (txt, txt_rrsig) = mattcorallo_txt_record();
 640                 for rr in [RR::Txt(txt), RR::RRSig(txt_rrsig)] { write_rr(&rr, 1, &mut rr_stream); }
 641                 for rr in matcorallo_dnskey().1 { write_rr(&rr, 1, &mut rr_stream); }
 642                 let (txt, txt_rrsig) = matcorallo_txt_record();
 643                 for rr in [RR::Txt(txt), RR::RRSig(txt_rrsig)] { write_rr(&rr, 1, &mut rr_stream); }
 644                 let (cname, cname_rrsig) = matcorallo_cname_record();
 645                 for rr in [RR::CName(cname), RR::RRSig(cname_rrsig)] { write_rr(&rr, 1, &mut rr_stream); }
 646
 647                 let mut rrs = parse_rr_stream(&rr_stream).unwrap();
 648                 rrs.shuffle(&mut rand::rngs::OsRng);
 649                 let mut verified_rrs = verify_rr_stream(&rrs).unwrap();
 650                 verified_rrs.verified_rrs.sort();
 651                 assert_eq!(verified_rrs.verified_rrs.len(), 3);
 652                 if let RR::Txt(txt) = &verified_rrs.verified_rrs[0] {
 653                         assert_eq!(txt.name.as_str(), "matt.user._bitcoin-payment.mattcorallo.com.");
 654                         assert_eq!(txt.data, b"bitcoin:?b12=lno1qsgqmqvgm96frzdg8m0gc6nzeqffvzsqzrxqy32afmr3jn9ggkwg3egfwch2hy0l6jut6vfd8vpsc3h89l6u3dm4q2d6nuamav3w27xvdmv3lpgklhg7l5teypqz9l53hj7zvuaenh34xqsz2sa967yzqkylfu9xtcd5ymcmfp32h083e805y7jfd236w9afhavqqvl8uyma7x77yun4ehe9pnhu2gekjguexmxpqjcr2j822xr7q34p078gzslf9wpwz5y57alxu99s0z2ql0kfqvwhzycqq45ehh58xnfpuek80hw6spvwrvttjrrq9pphh0dpydh06qqspp5uq4gpyt6n9mwexde44qv7lstzzq60nr40ff38u27un6y53aypmx0p4qruk2tf9mjwqlhxak4znvna5y");
 655                 } else { panic!(); }
 656                 if let RR::Txt(txt) = &verified_rrs.verified_rrs[1] {
 657                         assert_eq!(txt.name.as_str(), "txt_test.matcorallo.com.");
 658                         assert_eq!(txt.data, b"dnssec_prover_test");
 659                 } else { panic!(); }
 660                 if let RR::CName(cname) = &verified_rrs.verified_rrs[2] {
 661                         assert_eq!(cname.name.as_str(), "cname_test.matcorallo.com.");
 662                         assert_eq!(cname.canonical_name.as_str(), "txt_test.matcorallo.com.");
 663                 } else { panic!(); }
 664         }
 665
 666         #[test]
 667         fn check_wildcard_record() {
 668                 let dnskeys = matcorallo_dnskey().0;
 669                 let (txt, txt_rrsig) = matcorallo_wildcard_record();
 670                 let txt_resp = [txt];
 671                 verify_rrsig(&txt_rrsig, &dnskeys, txt_resp.iter().collect()).unwrap();
 672         }
 673
 674         #[test]
 675         fn check_wildcard_proof() {
 676                 let mut rr_stream = Vec::new();
 677                 for rr in root_dnskey().1 { write_rr(&rr, 1, &mut rr_stream); }
 678                 for rr in com_dnskey().1 { write_rr(&rr, 1, &mut rr_stream); }
 679                 for rr in matcorallo_dnskey().1 { write_rr(&rr, 1, &mut rr_stream); }
 680                 let (cname, cname_rrsig, txt, txt_rrsig) = matcorallo_cname_wildcard_record();
 681                 for rr in [RR::CName(cname), RR::RRSig(cname_rrsig)] { write_rr(&rr, 1, &mut rr_stream); }
 682                 for rr in [RR::Txt(txt), RR::RRSig(txt_rrsig)] { write_rr(&rr, 1, &mut rr_stream); }
 683
 684                 let mut rrs = parse_rr_stream(&rr_stream).unwrap();
 685                 rrs.shuffle(&mut rand::rngs::OsRng);
 686                 let mut verified_rrs = verify_rr_stream(&rrs).unwrap();
 687                 verified_rrs.verified_rrs.sort();
 688                 assert_eq!(verified_rrs.verified_rrs.len(), 2);
 689                 if let RR::Txt(txt) = &verified_rrs.verified_rrs[0] {
 690                         assert_eq!(txt.name.as_str(), "cname.wildcard_test.matcorallo.com.");
 691                         assert_eq!(txt.data, b"wildcard_test");
 692                 } else { panic!(); }
 693                 if let RR::CName(cname) = &verified_rrs.verified_rrs[1] {
 694                         assert_eq!(cname.name.as_str(), "test.cname_wildcard_test.matcorallo.com.");
 695                         assert_eq!(cname.canonical_name.as_str(), "cname.wildcard_test.matcorallo.com.");
 696                 } else { panic!(); }
 697         }
 698
 699         #[test]
 700         fn check_txt_sort_order() {
 701                 let mut rr_stream = Vec::new();
 702                 for rr in root_dnskey().1 { write_rr(&rr, 1, &mut rr_stream); }
 703                 for rr in com_dnskey().1 { write_rr(&rr, 1, &mut rr_stream); }
 704                 for rr in matcorallo_dnskey().1 { write_rr(&rr, 1, &mut rr_stream); }
 705                 let (mut txts, rrsig) = matcorallo_txt_sort_edge_cases_records();
 706                 write_rr(&rrsig, 1, &mut rr_stream);
 707                 for txt in txts.iter() { write_rr(txt, 1, &mut rr_stream); }
 708
 709                 let mut rrs = parse_rr_stream(&rr_stream).unwrap();
 710                 rrs.shuffle(&mut rand::rngs::OsRng);
 711                 let verified_rrs = verify_rr_stream(&rrs).unwrap();
 712                 let mut verified_txts = verified_rrs.verified_rrs
 713                         .iter().map(|rr| if let RR::Txt(txt) = rr { txt.clone() } else { panic!(); })
 714                         .collect::<Vec<_>>();
 715                 verified_txts.sort();
 716                 txts.sort();
 717                 assert_eq!(verified_txts, txts);
 718         }
 719
 720         #[test]
 721         fn rfc9102_parse_test() {
 722                 // Note that this is the `AuthenticationChain` field only, and ignores the
 723                 // `ExtSupportLifetime` field (stripping the top two 0 bytes from the front).
 724 let rfc9102_test_vector = Vec::from_hex("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").unwrap();
 725
 726                 let mut rrs = parse_rr_stream(&rfc9102_test_vector).unwrap();
 727                 rrs.shuffle(&mut rand::rngs::OsRng);
 728                 let verified_rrs = verify_rr_stream(&rrs).unwrap();
 729                 assert_eq!(verified_rrs.verified_rrs.len(), 1);
 730                 if let RR::TLSA(tlsa) = &verified_rrs.verified_rrs[0] {
 731                         assert_eq!(tlsa.cert_usage, 3);
 732                         assert_eq!(tlsa.selector, 1);
 733                         assert_eq!(tlsa.data_ty, 1);
 734                         assert_eq!(tlsa.data, Vec::from_hex("8bd1da95272f7fa4ffb24137fc0ed03aae67e5c4d8b3c50734e1050a7920b922").unwrap());
 735                 } else { panic!(); }
 736         }
 737 }