pdns/dnsseckeeper.hh

   1 /*
   2  * This file is part of PowerDNS or dnsdist.
   3  * Copyright -- PowerDNS.COM B.V. and its contributors
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of version 2 of the GNU General Public License as
   7  * published by the Free Software Foundation.
   8  *
   9  * In addition, for the avoidance of any doubt, permission is granted to
  10  * link this program with OpenSSL and to (re)distribute the binaries
  11  * produced as the result of such linking.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  21  */
  22 #pragma once
  23 #include <string>
  24 #include <string.h>
  25 #include <vector>
  26 #include <boost/logic/tribool.hpp>
  27 #include <boost/multi_index_container.hpp>
  28 #include <boost/multi_index/hashed_index.hpp>
  29 #include <boost/multi_index/ordered_index.hpp>
  30 #include <boost/tuple/tuple_comparison.hpp>
  31 #include <boost/multi_index/key_extractors.hpp>
  32 #include <boost/multi_index/sequenced_index.hpp>
  33 #include "dnssecinfra.hh"
  34 #include "dnsrecords.hh"
  35 #include "ueberbackend.hh"
  36
  37 using namespace ::boost::multi_index;
  38
  39 class DNSSECKeeper : public boost::noncopyable
  40 {
  41 public:
  42   enum keytype_t { KSK, ZSK, CSK };
  43   enum keyalgorithm_t : uint8_t {
  44     RSAMD5=1,
  45     DH=2,
  46     DSA=3,
  47     RSASHA1=5,
  48     DSANSEC3SHA1=6,
  49     RSASHA1NSEC3SHA1=7,
  50     RSASHA256=8,
  51     RSASHA512=10,
  52     ECCGOST=12,
  53     ECDSA256=13,
  54     ECDSA384=14,
  55     ED25519=15,
  56     ED448=16
  57   };
  58
  59   enum dsdigestalgorithm_t : uint8_t {
  60     DIGEST_SHA1=1,
  61     DIGEST_SHA256=2,
  62     DIGEST_GOST=3,
  63     DIGEST_SHA384=4
  64   };
  65
  66   struct KeyMetaData
  67   {
  68     string fname;
  69     unsigned int id;
  70     bool active;
  71     keytype_t keyType;
  72     bool hasSEPBit;
  73     bool published;
  74   };
  75   typedef std::pair<DNSSECPrivateKey, KeyMetaData> keymeta_t;
  76   typedef std::vector<keymeta_t > keyset_t;
  77
  78   static string keyTypeToString(const keytype_t &keyType)
  79   {
  80     switch(keyType) {
  81       case DNSSECKeeper::KSK:
  82         return("KSK");
  83       case DNSSECKeeper::ZSK:
  84         return("ZSK");
  85       case DNSSECKeeper::CSK:
  86         return("CSK");
  87       default:
  88         return("UNKNOWN");
  89     }
  90   }
  91
  92   /*
  93    * Returns the algorithm number based on the mnemonic (or old PowerDNS value of) a string.
  94    * See https://www.iana.org/assignments/dns-sec-alg-numbers/dns-sec-alg-numbers.xhtml for the mapping
  95    */
  96   static int shorthand2algorithm(const string &algorithm)
  97   {
  98     if (pdns_iequals(algorithm, "rsamd5")) return RSAMD5;
  99     if (pdns_iequals(algorithm, "dh")) return DH;
 100     if (pdns_iequals(algorithm, "dsa")) return DSA;
 101     if (pdns_iequals(algorithm, "rsasha1")) return RSASHA1;
 102     if (pdns_iequals(algorithm, "dsa-nsec3-sha1")) return DSANSEC3SHA1;
 103     if (pdns_iequals(algorithm, "rsasha1-nsec3-sha1")) return RSASHA1NSEC3SHA1;
 104     if (pdns_iequals(algorithm, "rsasha256")) return RSASHA256;
 105     if (pdns_iequals(algorithm, "rsasha512")) return RSASHA512;
 106     if (pdns_iequals(algorithm, "ecc-gost")) return ECCGOST;
 107     if (pdns_iequals(algorithm, "gost")) return ECCGOST;
 108     if (pdns_iequals(algorithm, "ecdsa256")) return ECDSA256;
 109     if (pdns_iequals(algorithm, "ecdsap256sha256")) return ECDSA256;
 110     if (pdns_iequals(algorithm, "ecdsa384")) return ECDSA384;
 111     if (pdns_iequals(algorithm, "ecdsap384sha384")) return ECDSA384;
 112     if (pdns_iequals(algorithm, "ed25519")) return ED25519;
 113     if (pdns_iequals(algorithm, "ed448")) return ED448;
 114     if (pdns_iequals(algorithm, "indirect")) return 252;
 115     if (pdns_iequals(algorithm, "privatedns")) return 253;
 116     if (pdns_iequals(algorithm, "privateoid")) return 254;
 117     return -1;
 118   }
 119
 120   /*
 121    * Returns the mnemonic from https://www.iana.org/assignments/dns-sec-alg-numbers/dns-sec-alg-numbers.xhtml
 122    */
 123   static string algorithm2name(uint8_t algo) {
 124     switch(algo) {
 125       case 0:
 126       case 4:
 127       case 9:
 128       case 11:
 129         return "Reserved";
 130       case RSAMD5:
 131         return "RSAMD5";
 132       case DH:
 133         return "DH";
 134       case DSA:
 135         return "DSA";
 136       case RSASHA1:
 137         return "RSASHA1";
 138       case DSANSEC3SHA1:
 139         return "DSA-NSEC3-SHA1";
 140       case RSASHA1NSEC3SHA1:
 141         return "RSASHA1-NSEC3-SHA1";
 142       case RSASHA256:
 143         return "RSASHA256";
 144       case RSASHA512:
 145         return "RSASHA512";
 146       case ECCGOST:
 147         return "ECC-GOST";
 148       case ECDSA256:
 149         return "ECDSAP256SHA256";
 150       case ECDSA384:
 151         return "ECDSAP384SHA384";
 152       case ED25519:
 153         return "ED25519";
 154       case ED448:
 155         return "ED448";
 156       case 252:
 157         return "INDIRECT";
 158       case 253:
 159         return "PRIVATEDNS";
 160       case 254:
 161         return "PRIVATEOID";
 162       default:
 163         return "Unallocated/Reserved";
 164     }
 165   }
 166
 167 private:
 168   UeberBackend* d_keymetadb;
 169   bool d_ourDB;
 170
 171 public:
 172   DNSSECKeeper() : d_keymetadb( new UeberBackend("key-only")), d_ourDB(true)
 173   {
 174
 175   }
 176
 177   DNSSECKeeper(UeberBackend* db) : d_keymetadb(db), d_ourDB(false)
 178   {
 179   }
 180
 181   ~DNSSECKeeper()
 182   {
 183     if(d_ourDB)
 184       delete d_keymetadb;
 185   }
 186
 187   static uint64_t dbdnssecCacheSizes(const std::string& str);
 188   static void clearAllCaches();
 189   static void clearCaches(const DNSName& name);
 190
 191   bool doesDNSSEC();
 192   bool isSecuredZone(const DNSName& zone);
 193   keyset_t getEntryPoints(const DNSName& zname);
 194   keyset_t getKeys(const DNSName& zone, bool useCache = true);
 195   DNSSECPrivateKey getKeyById(const DNSName& zone, unsigned int id);
 196   bool addKey(const DNSName& zname, bool setSEPBit, int algorithm, int64_t& id, int bits=0, bool active=true, bool published=true);
 197   bool addKey(const DNSName& zname, const DNSSECPrivateKey& dpk, int64_t& id, bool active=true, bool published=true);
 198   bool removeKey(const DNSName& zname, unsigned int id);
 199   bool activateKey(const DNSName& zname, unsigned int id);
 200   bool deactivateKey(const DNSName& zname, unsigned int id);
 201   bool publishKey(const DNSName& zname, unsigned int id);
 202   bool unpublishKey(const DNSName& zname, unsigned int id);
 203   bool checkKeys(const DNSName& zname, vector<string>* errorMessages = nullptr);
 204
 205   bool getNSEC3PARAM(const DNSName& zname, NSEC3PARAMRecordContent* n3p=0, bool* narrow=0);
 206   bool checkNSEC3PARAM(const NSEC3PARAMRecordContent& ns3p, string& msg);
 207   bool setNSEC3PARAM(const DNSName& zname, const NSEC3PARAMRecordContent& n3p, const bool& narrow=false);
 208   bool unsetNSEC3PARAM(const DNSName& zname);
 209   bool getPreRRSIGs(UeberBackend& db, const DNSName& signer, const DNSName& qname, const DNSName& wildcardname, const QType& qtype, DNSResourceRecord::Place, vector<DNSZoneRecord>& rrsigs, uint32_t signTTL);
 210   bool isPresigned(const DNSName& zname);
 211   bool setPresigned(const DNSName& zname);
 212   bool unsetPresigned(const DNSName& zname);
 213   bool setPublishCDNSKEY(const DNSName& zname);
 214   void getPublishCDNSKEY(const DNSName& zname, std::string& value);
 215   bool unsetPublishCDNSKEY(const DNSName& zname);
 216   bool setPublishCDS(const DNSName& zname, const string& digestAlgos);
 217   void getPublishCDS(const DNSName& zname, std::string& value);
 218   bool unsetPublishCDS(const DNSName& zname);
 219
 220   bool TSIGGrantsAccess(const DNSName& zone, const DNSName& keyname);
 221   bool getTSIGForAccess(const DNSName& zone, const ComboAddress& master, DNSName* keyname);
 222
 223   void startTransaction(const DNSName& zone, int zone_id)
 224   {
 225     (*d_keymetadb->backends.begin())->startTransaction(zone, zone_id);
 226   }
 227
 228   void commitTransaction()
 229   {
 230     (*d_keymetadb->backends.begin())->commitTransaction();
 231   }
 232
 233   void getFromMetaOrDefault(const DNSName& zname, const std::string& key, std::string& value, const std::string& defaultvalue);
 234   bool getFromMeta(const DNSName& zname, const std::string& key, std::string& value);
 235   void getSoaEdit(const DNSName& zname, std::string& value);
 236   bool unSecureZone(const DNSName& zone, std::string& error, std::string& info);
 237   bool rectifyZone(const DNSName& zone, std::string& error, std::string& info, bool doTransaction);
 238
 239   static void setMaxEntries(size_t maxEntries);
 240
 241 private:
 242
 243
 244   struct KeyCacheEntry
 245   {
 246     typedef vector<DNSSECKeeper::keymeta_t> keys_t;
 247
 248     uint32_t getTTD() const
 249     {
 250       return d_ttd;
 251     }
 252
 253     DNSName d_domain;
 254     mutable keys_t d_keys;
 255     unsigned int d_ttd;
 256   };
 257
 258   struct METACacheEntry
 259   {
 260     uint32_t getTTD() const
 261     {
 262       return d_ttd;
 263     }
 264
 265     DNSName d_domain;
 266     mutable std::string d_key, d_value;
 267     mutable bool d_isset;
 268     unsigned int d_ttd;
 269
 270   };
 271
 272   struct KeyCacheTag{};
 273   struct CompositeTag{};
 274   struct SequencedTag{};
 275
 276   typedef multi_index_container<
 277     KeyCacheEntry,
 278     indexed_by<
 279       hashed_unique<tag<KeyCacheTag>,member<KeyCacheEntry, DNSName, &KeyCacheEntry::d_domain> >,
 280       sequenced<tag<SequencedTag>>
 281     >
 282   > keycache_t;
 283
 284   typedef multi_index_container<
 285     METACacheEntry,
 286     indexed_by<
 287       ordered_unique<tag<CompositeTag>,
 288         composite_key<
 289           METACacheEntry,
 290           member<METACacheEntry, DNSName, &METACacheEntry::d_domain> ,
 291           member<METACacheEntry, std::string, &METACacheEntry::d_key>
 292         >, composite_key_compare<std::less<DNSName>, CIStringCompare> >,
 293       sequenced<tag<SequencedTag>>
 294     >
 295   > metacache_t;
 296
 297   void cleanup();
 298
 299   static keycache_t s_keycache;
 300   static metacache_t s_metacache;
 301   static pthread_rwlock_t s_metacachelock;
 302   static pthread_rwlock_t s_keycachelock;
 303   static AtomicCounter s_ops;
 304   static time_t s_last_prune;
 305   static size_t s_maxEntries;
 306
 307 public:
 308   void preRemoval(const KeyCacheEntry&)
 309   {
 310   }
 311   void preRemoval(const METACacheEntry&)
 312   {
 313   }
 314 };
 315
 316 class DNSPacket;
 317 uint32_t localtime_format_YYYYMMDDSS(time_t t, uint32_t seq);
 318 // for SOA-EDIT
 319 uint32_t calculateEditSOA(uint32_t old_serial, DNSSECKeeper& dk, const DNSName& zonename);
 320 uint32_t calculateEditSOA(uint32_t old_serial, const string& kind, const DNSName& zonename);
 321 // for SOA-EDIT-DNSUPDATE/API
 322 bool increaseSOARecord(DNSResourceRecord& dr, const string& increaseKind, const string& editKind);
 323 bool makeIncreasedSOARecord(SOAData& sd, const string& increaseKind, const string& editKind, DNSResourceRecord& rrout);
 324 DNSZoneRecord makeEditedDNSZRFromSOAData(DNSSECKeeper& dk, const SOAData& sd, DNSResourceRecord::Place place=DNSResourceRecord::ANSWER);