#include "dnssecinfra.hh"
#include "namespaces.hh"
-#include "md5.hh"
+#include "digests.hh"
#include "dnsseckeeper.hh"
#include "dns_random.hh"
#include "lock.hh"
#include "statbag.hh"
extern StatBag S;
+static pthread_rwlock_t g_signatures_lock = PTHREAD_RWLOCK_INITIALIZER;
+typedef map<pair<string, string>, string> signaturecache_t;
+static signaturecache_t g_signatures;
+static int g_cacheweekno;
+
+const static std::set<uint16_t> g_KSKSignedQTypes {QType::DNSKEY, QType::CDS, QType::CDNSKEY};
+AtomicCounter* g_signatureCount;
+
+static std::string getLookupKey(const std::string& msg)
+{
+ try {
+ return pdns_md5sum(msg);
+ }
+ catch(const std::runtime_error& e) {
+ return pdns_sha1sum(msg);
+ }
+}
+
+static void fillOutRRSIG(DNSSECPrivateKey& dpk, const DNSName& signQName, RRSIGRecordContent& rrc, vector<shared_ptr<DNSRecordContent> >& toSign)
+{
+ if(!g_signatureCount)
+ g_signatureCount = S.getPointer("signatures");
+
+ DNSKEYRecordContent drc = dpk.getDNSKEY();
+ const std::shared_ptr<DNSCryptoKeyEngine> rc = dpk.getKey();
+ rrc.d_tag = drc.getTag();
+ rrc.d_algorithm = drc.d_algorithm;
+
+ string msg=getMessageForRRSET(signQName, rrc, toSign); // this is what we will hash & sign
+ pair<string, string> lookup(rc->getPubKeyHash(), getLookupKey(msg)); // this hash is a memory saving exercise
+
+ bool doCache=1;
+ if(doCache)
+ {
+ ReadLock l(&g_signatures_lock);
+ signaturecache_t::const_iterator iter = g_signatures.find(lookup);
+ if(iter != g_signatures.end()) {
+ rrc.d_signature=iter->second;
+ return;
+ }
+ // else cerr<<"Miss!"<<endl;
+ }
+
+ rrc.d_signature = rc->sign(msg);
+ (*g_signatureCount)++;
+ if(doCache) {
+ /* we add some jitter here so not all your slaves start pruning their caches at the very same millisecond */
+ int weekno = (time(0) - dns_random(3600)) / (86400*7); // we just spent milliseconds doing a signature, microsecond more won't kill us
+ const static int maxcachesize=::arg().asNum("max-signature-cache-entries", INT_MAX);
+
+ WriteLock l(&g_signatures_lock);
+ if(g_cacheweekno < weekno || g_signatures.size() >= (uint) maxcachesize) { // blunt but effective (C) Habbie, mind04
+ g_log<<Logger::Warning<<"Cleared signature cache."<<endl;
+ g_signatures.clear();
+ g_cacheweekno = weekno;
+ }
+ g_signatures[lookup] = rrc.d_signature;
+ }
+}
+
/* this is where the RRSIGs begin, keys are retrieved,
but the actual signing happens in fillOutRRSIG */
-int getRRSIGsForRRSET(DNSSECKeeper& dk, const DNSName& signer, const DNSName signQName, uint16_t signQType, uint32_t signTTL,
- vector<shared_ptr<DNSRecordContent> >& toSign, vector<RRSIGRecordContent>& rrcs)
+static int getRRSIGsForRRSET(DNSSECKeeper& dk, const DNSName& signer, const DNSName& signQName, uint16_t signQType, uint32_t signTTL,
+ vector<shared_ptr<DNSRecordContent> >& toSign, vector<RRSIGRecordContent>& rrcs)
{
if(toSign.empty())
return -1;
if(!keymeta.second.active)
continue;
+ bool signWithKSK = g_KSKSignedQTypes.count(signQType) != 0;
+ // Do not sign DNSKEY RRsets with the ZSK
if((signQType == QType::DNSKEY && keymeta.second.keyType == DNSSECKeeper::ZSK) ||
- (signQType != QType::DNSKEY && keymeta.second.keyType == DNSSECKeeper::KSK)) {
+ // Do not sign any other RRset than DNSKEY, CDS and CDNSKEY with a KSK
+ (!signWithKSK && keymeta.second.keyType == DNSSECKeeper::KSK)) {
continue;
}
}
// this is the entrypoint from DNSPacket
-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<DNSZoneRecord>& outsigned, uint32_t origTTL)
+static 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<DNSZoneRecord>& outsigned, uint32_t origTTL)
{
//cerr<<"Asked to sign '"<<signQName<<"'|"<<DNSRecordContent::NumberToType(signQType)<<", "<<toSign.size()<<" records\n";
if(toSign.empty())
toSign.clear();
}
-static pthread_rwlock_t g_signatures_lock = PTHREAD_RWLOCK_INITIALIZER;
-typedef map<pair<string, string>, string> signaturecache_t;
-static signaturecache_t g_signatures;
-static int g_cacheweekno;
-
-AtomicCounter* g_signatureCount;
-
uint64_t signatureCacheSize(const std::string& str)
{
ReadLock l(&g_signatures_lock);
return g_signatures.size();
}
-void fillOutRRSIG(DNSSECPrivateKey& dpk, const DNSName& signQName, RRSIGRecordContent& rrc, vector<shared_ptr<DNSRecordContent> >& toSign)
-{
- if(!g_signatureCount)
- g_signatureCount = S.getPointer("signatures");
-
- DNSKEYRecordContent drc = dpk.getDNSKEY();
- const std::shared_ptr<DNSCryptoKeyEngine> rc = dpk.getKey();
- rrc.d_tag = drc.getTag();
- rrc.d_algorithm = drc.d_algorithm;
-
- string msg=getMessageForRRSET(signQName, rrc, toSign); // this is what we will hash & sign
- pair<string, string> lookup(rc->getPubKeyHash(), pdns_md5sum(msg)); // this hash is a memory saving exercise
-
- bool doCache=1;
- if(doCache)
- {
- ReadLock l(&g_signatures_lock);
- signaturecache_t::const_iterator iter = g_signatures.find(lookup);
- if(iter != g_signatures.end()) {
- rrc.d_signature=iter->second;
- return;
- }
- // else cerr<<"Miss!"<<endl;
- }
-
- rrc.d_signature = rc->sign(msg);
- (*g_signatureCount)++;
- if(doCache) {
- /* we add some jitter here so not all your slaves start pruning their caches at the very same millisecond */
- int weekno = (time(0) - dns_random(3600)) / (86400*7); // we just spent milliseconds doing a signature, microsecond more won't kill us
- const static int maxcachesize=::arg().asNum("max-signature-cache-entries", INT_MAX);
-
- WriteLock l(&g_signatures_lock);
- if(g_cacheweekno < weekno || g_signatures.size() >= (uint) maxcachesize) { // blunt but effective (C) Habbie, mind04
- L<<Logger::Warning<<"Cleared signature cache."<<endl;
- g_signatures.clear();
- g_cacheweekno = weekno;
- }
- g_signatures[lookup] = rrc.d_signature;
- }
-}
-
static bool rrsigncomp(const DNSZoneRecord& a, const DNSZoneRecord& b)
{
return tie(a.dr.d_place, a.dr.d_type) < tie(b.dr.d_place, b.dr.d_type);
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