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/*
* This file is part of PowerDNS or dnsdist.
* Copyright -- PowerDNS.COM B.V. and its contributors
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of version 2 of the GNU General Public License as
* published by the Free Software Foundation.
*
* In addition, for the avoidance of any doubt, permission is granted to
* link this program with OpenSSL and to (re)distribute the binaries
* produced as the result of such linking.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifndef PDNS_DNSSECINFRA_HH
#define PDNS_DNSSECINFRA_HH
#include "dnsrecords.hh"
#include <string>
#include <vector>
#include <map>
#include "misc.hh"
class UeberBackend;
// rules of the road: Algorithm must be set in 'make' for each KeyEngine, and will NEVER change!
class DNSCryptoKeyEngine
{
public:
explicit DNSCryptoKeyEngine(unsigned int algorithm) : d_algorithm(algorithm) {}
virtual ~DNSCryptoKeyEngine() {};
virtual string getName() const = 0;
typedef std::map<std::string, std::string> stormap_t;
typedef std::vector<std::pair<std::string, std::string > > storvector_t;
virtual void create(unsigned int bits)=0;
virtual storvector_t convertToISCVector() const =0;
std::string convertToISC() const ;
virtual std::string sign(const std::string& msg) const =0;
virtual std::string hash(const std::string& msg) const =0;
virtual bool verify(const std::string& msg, const std::string& signature) const =0;
virtual std::string getPubKeyHash()const =0;
virtual std::string getPublicKeyString()const =0;
virtual int getBits() const =0;
virtual void fromISCMap(DNSKEYRecordContent& drc, stormap_t& stormap)=0;
virtual void fromPEMString(DNSKEYRecordContent& drc, const std::string& raw)
{
throw std::runtime_error("Can't import from PEM string");
}
virtual void fromPublicKeyString(const std::string& content) = 0;
virtual bool checkKey() const
{
return true;
}
static DNSCryptoKeyEngine* makeFromISCFile(DNSKEYRecordContent& drc, const char* fname);
static DNSCryptoKeyEngine* makeFromISCString(DNSKEYRecordContent& drc, const std::string& content);
static DNSCryptoKeyEngine* makeFromPEMString(DNSKEYRecordContent& drc, const std::string& raw);
static DNSCryptoKeyEngine* makeFromPublicKeyString(unsigned int algorithm, const std::string& raw);
static DNSCryptoKeyEngine* make(unsigned int algorithm);
typedef DNSCryptoKeyEngine* maker_t(unsigned int algorithm);
static void report(unsigned int algorithm, maker_t* maker, bool fallback=false);
static std::pair<unsigned int, unsigned int> testMakers(unsigned int algorithm, maker_t* creator, maker_t* signer, maker_t* verifier);
static vector<pair<uint8_t, string>> listAllAlgosWithBackend();
static bool testAll();
static bool testOne(int algo);
private:
typedef std::map<unsigned int, maker_t*> makers_t;
typedef std::map<unsigned int, vector<maker_t*> > allmakers_t;
static makers_t& getMakers()
{
static makers_t s_makers;
return s_makers;
}
static allmakers_t& getAllMakers()
{
static allmakers_t s_allmakers;
return s_allmakers;
}
protected:
const unsigned int d_algorithm;
};
struct DNSSECPrivateKey
{
uint16_t getTag();
const DNSCryptoKeyEngine* getKey() const
{
return d_key.get();
}
void setKey(const shared_ptr<DNSCryptoKeyEngine> key)
{
d_key = key;
}
DNSKEYRecordContent getDNSKEY() const;
uint16_t d_flags;
uint8_t d_algorithm;
private:
shared_ptr<DNSCryptoKeyEngine> d_key;
};
struct CanonicalCompare: public std::binary_function<string, string, bool>
{
bool operator()(const std::string& a, const std::string& b) {
std::vector<std::string> avect, bvect;
stringtok(avect, a, ".");
stringtok(bvect, b, ".");
reverse(avect.begin(), avect.end());
reverse(bvect.begin(), bvect.end());
return avect < bvect;
}
};
bool sharedDNSSECCompare(const std::shared_ptr<DNSRecordContent>& a, const shared_ptr<DNSRecordContent>& b);
string getMessageForRRSET(const DNSName& qname, const RRSIGRecordContent& rrc, std::vector<std::shared_ptr<DNSRecordContent> >& signRecords, bool processRRSIGLabels = false);
DSRecordContent makeDSFromDNSKey(const DNSName& qname, const DNSKEYRecordContent& drc, int digest=1);
class RSAContext;
class DNSSECKeeper;
struct DNSSECPrivateKey;
void fillOutRRSIG(DNSSECPrivateKey& dpk, const DNSName& signQName, RRSIGRecordContent& rrc, vector<shared_ptr<DNSRecordContent> >& toSign);
uint32_t getStartOfWeek();
void addSignature(DNSSECKeeper& dk, UeberBackend& db, const DNSName& signer, const DNSName signQName, const DNSName& wildcardname, uint16_t signQType, uint32_t signTTL, DNSResourceRecord::Place signPlace,
vector<shared_ptr<DNSRecordContent> >& toSign, vector<DNSResourceRecord>& outsigned, uint32_t origTTL);
int getRRSIGsForRRSET(DNSSECKeeper& dk, const DNSName& signer, const DNSName signQName, uint16_t signQType, uint32_t signTTL,
vector<shared_ptr<DNSRecordContent> >& toSign, vector<RRSIGRecordContent> &rrc);
string hashQNameWithSalt(const NSEC3PARAMRecordContent& ns3prc, const DNSName& qname);
string hashQNameWithSalt(const std::string& salt, unsigned int iterations, const DNSName& qname);
void decodeDERIntegerSequence(const std::string& input, vector<string>& output);
class DNSPacket;
void addRRSigs(DNSSECKeeper& dk, UeberBackend& db, const std::set<DNSName>& authMap, vector<DNSResourceRecord>& rrs);
string calculateHMAC(const std::string& key, const std::string& text, TSIGHashEnum hash);
bool constantTimeStringEquals(const std::string& a, const std::string& b);
string makeTSIGMessageFromTSIGPacket(const string& opacket, unsigned int tsigoffset, const DNSName& keyname, const TSIGRecordContent& trc, const string& previous, bool timersonly, unsigned int dnsHeaderOffset=0);
void addTSIG(DNSPacketWriter& pw, TSIGRecordContent* trc, const DNSName& tsigkeyname, const string& tsigsecret, const string& tsigprevious, bool timersonly);
uint64_t signatureCacheSize(const std::string& str);
#endif
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