Yumin Xia | f853ad7 | 2016-11-03 21:14:07 -0700 | [diff] [blame] | 1 | /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */ |
| 2 | /** |
| 3 | * Copyright (c) 2014-2016, Regents of the University of California. |
| 4 | * |
| 5 | * This file is part of NDNS (Named Data Networking Domain Name Service). |
| 6 | * See AUTHORS.md for complete list of NDNS authors and contributors. |
| 7 | * |
| 8 | * NDNS is free software: you can redistribute it and/or modify it under the terms |
| 9 | * of the GNU General Public License as published by the Free Software Foundation, |
| 10 | * either version 3 of the License, or (at your option) any later version. |
| 11 | * |
| 12 | * NDNS is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; |
| 13 | * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR |
| 14 | * PURPOSE. See the GNU General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License along with |
| 17 | * NDNS, e.g., in COPYING.md file. If not, see <http://www.gnu.org/licenses/>. |
| 18 | */ |
| 19 | |
| 20 | #include "rrset-factory.hpp" |
| 21 | #include "mgmt/management-tool.hpp" |
| 22 | |
| 23 | #include <boost/algorithm/string/join.hpp> |
| 24 | |
| 25 | namespace ndn { |
| 26 | namespace ndns { |
| 27 | |
| 28 | NDNS_LOG_INIT("RrsetFactory") |
| 29 | |
| 30 | RrsetFactory::RrsetFactory(const std::string& dbFile, |
| 31 | const Name& zoneName, |
| 32 | KeyChain& keyChain, |
| 33 | const Name& inputDskCertName) |
| 34 | : m_keyChain(keyChain) |
| 35 | , m_dbFile(dbFile) |
| 36 | , m_zone(zoneName) |
| 37 | , m_dskCertName(inputDskCertName) |
| 38 | , m_checked(false) |
| 39 | { |
| 40 | if (m_dskCertName == DEFAULT_CERT) { |
| 41 | m_dskName = m_keyChain.getDefaultKeyNameForIdentity(zoneName); |
| 42 | m_dskCertName = m_keyChain.getDefaultCertificateNameForKey(m_dskName); |
| 43 | } |
| 44 | } |
| 45 | |
| 46 | void |
| 47 | RrsetFactory::checkZoneKey() |
| 48 | { |
| 49 | onlyCheckZone(); |
| 50 | if (m_dskCertName != DEFAULT_CERT && |
| 51 | !matchCertificate(m_dskCertName, m_zone.getName())) { |
| 52 | BOOST_THROW_EXCEPTION(Error("Cannot verify certificate")); |
| 53 | } |
| 54 | } |
| 55 | |
| 56 | void |
| 57 | RrsetFactory::onlyCheckZone() |
| 58 | { |
| 59 | if (m_checked) { |
| 60 | return ; |
| 61 | } |
| 62 | m_checked = true; |
| 63 | |
| 64 | DbMgr dbMgr(m_dbFile); |
| 65 | const Name& zoneName = m_zone.getName(); |
| 66 | if (!dbMgr.find(m_zone)) { |
| 67 | BOOST_THROW_EXCEPTION(Error(zoneName.toUri() + " is not presented in the NDNS db")); |
| 68 | } |
| 69 | } |
| 70 | |
| 71 | |
| 72 | std::pair<Rrset, Name> |
| 73 | RrsetFactory::generateBaseRrset(const Name& label, |
| 74 | const name::Component& type, |
| 75 | const uint64_t version, |
| 76 | const time::seconds& ttl) |
| 77 | { |
| 78 | Rrset rrset(&m_zone); |
| 79 | |
| 80 | rrset.setLabel(label); |
| 81 | rrset.setType(type); |
| 82 | rrset.setTtl(ttl); |
| 83 | |
| 84 | name::Component qType; |
| 85 | if (type == label::CERT_RR_TYPE) { |
| 86 | qType = label::NDNS_CERT_QUERY; |
| 87 | } else { |
| 88 | qType = label::NDNS_ITERATIVE_QUERY; |
| 89 | } |
| 90 | |
| 91 | Name name; |
| 92 | name.append(m_zone.getName()) |
| 93 | .append(qType) |
| 94 | .append(label) |
| 95 | .append(type); |
| 96 | |
| 97 | if (version != VERSION_USE_UNIX_TIMESTAMP) { |
| 98 | name.append(name::Component::fromVersion(version)); |
| 99 | } else { |
| 100 | name.appendVersion(); |
| 101 | } |
| 102 | |
| 103 | rrset.setVersion(name.get(-1)); |
| 104 | |
| 105 | return std::make_pair(rrset, name); |
| 106 | } |
| 107 | |
| 108 | bool |
| 109 | RrsetFactory::matchCertificate(const Name& certName, const Name& identity) |
| 110 | { |
| 111 | if (!m_keyChain.doesCertificateExist(certName)) { |
| 112 | NDNS_LOG_WARN(certName.toUri() << " is not presented in KeyChain"); |
| 113 | return false; |
| 114 | } |
| 115 | |
| 116 | // Check its public key information |
| 117 | shared_ptr<IdentityCertificate> cert = m_keyChain.getCertificate(certName); |
| 118 | Name keyName = cert->getPublicKeyName(); |
| 119 | |
| 120 | if (!identity.isPrefixOf(keyName) || identity.size() != keyName.size() - 1) { |
| 121 | NDNS_LOG_WARN(keyName.toUri() << " is not a key of " << identity.toUri()); |
| 122 | return false; |
| 123 | } |
| 124 | |
| 125 | if (!m_keyChain.doesKeyExistInTpm(keyName, KeyClass::PRIVATE)) { |
| 126 | NDNS_LOG_WARN("Private key: " << keyName.toUri() << " is not present in KeyChain"); |
| 127 | return false; |
| 128 | } |
| 129 | |
| 130 | return true; |
| 131 | } |
| 132 | |
| 133 | Rrset |
| 134 | RrsetFactory::generateNsRrset(const Name& label, |
| 135 | const name::Component& type, |
| 136 | const uint64_t version, |
| 137 | time::seconds ttl, |
| 138 | const ndn::Link::DelegationSet& delegations) |
| 139 | { |
| 140 | if (!m_checked) { |
| 141 | BOOST_THROW_EXCEPTION(Error("You have to call checkZoneKey before call generate functions")); |
| 142 | } |
| 143 | |
| 144 | if (ttl == DEFAULT_RR_TTL) |
| 145 | ttl = m_zone.getTtl(); |
| 146 | |
| 147 | std::pair<Rrset, Name> rrsetAndName = generateBaseRrset(label, type, version, ttl); |
| 148 | const Name& name = rrsetAndName.second; |
| 149 | Rrset& rrset = rrsetAndName.first; |
| 150 | |
| 151 | Link link(name); |
| 152 | for (const auto& i : delegations) { |
| 153 | link.addDelegation(i.first, i.second); |
| 154 | } |
| 155 | |
Yumin Xia | a484ba7 | 2016-11-10 20:40:12 -0800 | [diff] [blame] | 156 | setContentType(link, NDNS_LINK, ttl); |
Yumin Xia | f853ad7 | 2016-11-03 21:14:07 -0700 | [diff] [blame] | 157 | sign(link); |
| 158 | rrset.setData(link.wireEncode()); |
| 159 | |
| 160 | return rrset; |
| 161 | } |
| 162 | |
| 163 | Rrset |
| 164 | RrsetFactory::generateTxtRrset(const Name& label, |
| 165 | const name::Component& type, |
| 166 | const uint64_t version, |
| 167 | time::seconds ttl, |
| 168 | const std::vector<std::string>& strings) |
| 169 | { |
| 170 | if (!m_checked) { |
| 171 | BOOST_THROW_EXCEPTION(Error("You have to call checkZoneKey before call generate functions")); |
| 172 | } |
| 173 | |
| 174 | if (ttl == DEFAULT_RR_TTL) |
| 175 | ttl = m_zone.getTtl(); |
| 176 | |
| 177 | Name name; |
| 178 | Rrset rrset; |
| 179 | std::tie(rrset, name) = generateBaseRrset(label, type, version, ttl); |
| 180 | |
| 181 | std::vector<Block> rrs; |
| 182 | for (const auto& item : strings) { |
| 183 | rrs.push_back(makeBinaryBlock(ndns::tlv::RrData, |
| 184 | item.c_str(), |
| 185 | item.size())); |
| 186 | } |
| 187 | |
| 188 | Data data(name); |
| 189 | data.setContent(wireEncode(rrs)); |
| 190 | |
Yumin Xia | a484ba7 | 2016-11-10 20:40:12 -0800 | [diff] [blame] | 191 | setContentType(data, NDNS_RESP, ttl); |
Yumin Xia | f853ad7 | 2016-11-03 21:14:07 -0700 | [diff] [blame] | 192 | sign(data); |
| 193 | rrset.setData(data.wireEncode()); |
| 194 | |
| 195 | return rrset; |
| 196 | } |
| 197 | |
| 198 | Rrset |
| 199 | RrsetFactory::generateCertRrset(const Name& label, |
| 200 | const name::Component& type, |
| 201 | const uint64_t version, |
| 202 | time::seconds ttl, |
| 203 | const IdentityCertificate& cert) |
| 204 | { |
| 205 | if (!m_checked) { |
| 206 | BOOST_THROW_EXCEPTION(Error("You have to call checkZoneKey before call generate functions")); |
| 207 | } |
| 208 | |
| 209 | if (ttl == DEFAULT_RR_TTL) |
| 210 | ttl = m_zone.getTtl(); |
| 211 | |
| 212 | Name name; |
| 213 | Rrset rrset; |
| 214 | std::tie(rrset, name) = generateBaseRrset(label, type, version, ttl); |
| 215 | |
| 216 | Data data(name); |
| 217 | data.setContent(cert.wireEncode()); |
| 218 | |
Yumin Xia | 3c6b1fd | 2016-12-11 19:08:47 -0800 | [diff] [blame^] | 219 | setContentType(data, NDNS_KEY, ttl); |
Yumin Xia | f853ad7 | 2016-11-03 21:14:07 -0700 | [diff] [blame] | 220 | sign(data); |
| 221 | rrset.setData(data.wireEncode()); |
| 222 | |
| 223 | return rrset; |
| 224 | } |
| 225 | |
| 226 | |
| 227 | void |
| 228 | RrsetFactory::sign(Data& data) |
| 229 | { |
| 230 | m_keyChain.sign(data, m_dskCertName); |
| 231 | } |
| 232 | |
| 233 | void |
Yumin Xia | a484ba7 | 2016-11-10 20:40:12 -0800 | [diff] [blame] | 234 | RrsetFactory::setContentType(Data& data, NdnsContentType contentType, |
| 235 | const time::seconds& ttl) |
Yumin Xia | f853ad7 | 2016-11-03 21:14:07 -0700 | [diff] [blame] | 236 | { |
Yumin Xia | a484ba7 | 2016-11-10 20:40:12 -0800 | [diff] [blame] | 237 | data.setContentType(contentType); |
| 238 | data.setFreshnessPeriod(ttl); |
Yumin Xia | f853ad7 | 2016-11-03 21:14:07 -0700 | [diff] [blame] | 239 | } |
| 240 | |
| 241 | template<encoding::Tag TAG> |
| 242 | inline size_t |
| 243 | RrsetFactory::wireEncode(EncodingImpl<TAG>& block, const std::vector<Block>& rrs) const |
| 244 | { |
| 245 | // Content :: = CONTENT-TYPE TLV-LENGTH |
| 246 | // Block* |
| 247 | |
| 248 | size_t totalLength = 0; |
| 249 | for (auto iter = rrs.rbegin(); iter != rrs.rend(); ++iter) { |
| 250 | totalLength += block.prependBlock(*iter); |
| 251 | } |
| 252 | |
| 253 | totalLength += block.prependVarNumber(totalLength); |
| 254 | totalLength += block.prependVarNumber(::ndn::tlv::Content); |
| 255 | |
| 256 | return totalLength; |
| 257 | } |
| 258 | |
| 259 | const Block |
| 260 | RrsetFactory::wireEncode(const std::vector<Block>& rrs) const |
| 261 | { |
| 262 | EncodingEstimator estimator; |
| 263 | size_t estimatedSize = wireEncode(estimator, rrs); |
| 264 | EncodingBuffer buffer(estimatedSize, 0); |
| 265 | wireEncode(buffer, rrs); |
| 266 | return buffer.block(); |
| 267 | } |
| 268 | |
| 269 | std::vector<std::string> |
| 270 | RrsetFactory::wireDecodeTxt(const Block& wire) |
| 271 | { |
| 272 | std::vector<std::string> txts; |
| 273 | wire.parse(); |
| 274 | |
Yumin Xia | a484ba7 | 2016-11-10 20:40:12 -0800 | [diff] [blame] | 275 | for (const auto& e : wire.elements()) { |
Yumin Xia | f853ad7 | 2016-11-03 21:14:07 -0700 | [diff] [blame] | 276 | txts.push_back(std::string(reinterpret_cast<const char*>(e.value()), |
| 277 | e.value_size())); |
| 278 | } |
| 279 | |
| 280 | return txts; |
| 281 | } |
| 282 | |
| 283 | |
| 284 | } // namespace ndns |
| 285 | } // namespace ndn |