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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.
*/
#define BOOST_TEST_DYN_LINK
#define BOOST_TEST_NO_MAIN
#include <boost/test/unit_test.hpp>
#include "dnscrypt.hh"
#include "dnsname.hh"
#include "dnsparser.hh"
#include "dnswriter.hh"
#include "dolog.hh"
#include <unistd.h>
bool g_verbose{false};
bool g_syslog{true};
bool g_logtimestamps{false};
std::optional<std::ofstream> g_verboseStream{std::nullopt};
BOOST_AUTO_TEST_SUITE(test_dnscrypt_cc)
#ifdef HAVE_DNSCRYPT
// plaintext query for cert
BOOST_AUTO_TEST_CASE(DNSCryptPlaintextQuery) {
DNSCryptPrivateKey resolverPrivateKey;
DNSCryptCert resolverCert;
unsigned char providerPublicKey[DNSCRYPT_PROVIDER_PUBLIC_KEY_SIZE];
unsigned char providerPrivateKey[DNSCRYPT_PROVIDER_PRIVATE_KEY_SIZE];
time_t now = time(nullptr);
DNSCryptContext::generateProviderKeys(providerPublicKey, providerPrivateKey);
DNSCryptContext::generateCertificate(1, now, now + (24 * 60 * 3600), DNSCryptExchangeVersion::VERSION1, providerPrivateKey, resolverPrivateKey, resolverCert);
auto ctx = std::make_shared<DNSCryptContext>("2.name", resolverCert, resolverPrivateKey);
DNSName name("2.name.");
PacketBuffer plainQuery;
GenericDNSPacketWriter<PacketBuffer> pw(plainQuery, name, QType::TXT, QClass::IN, 0);
pw.getHeader()->rd = 0;
std::shared_ptr<DNSCryptQuery> query = std::make_shared<DNSCryptQuery>(ctx);
query->parsePacket(plainQuery, false, now);
BOOST_CHECK_EQUAL(query->isValid(), true);
BOOST_CHECK_EQUAL(query->isEncrypted(), false);
PacketBuffer response;
query->getCertificateResponse(now, response);
MOADNSParser mdp(false, (char*) response.data(), response.size());
BOOST_CHECK_EQUAL(mdp.d_header.qdcount, 1U);
BOOST_CHECK_EQUAL(mdp.d_header.ancount, 1U);
BOOST_CHECK_EQUAL(mdp.d_header.nscount, 0U);
BOOST_CHECK_EQUAL(mdp.d_header.arcount, 0U);
BOOST_CHECK_EQUAL(mdp.d_qname.toString(), "2.name.");
BOOST_CHECK(mdp.d_qclass == QClass::IN);
BOOST_CHECK(mdp.d_qtype == QType::TXT);
}
// invalid plaintext query (A)
BOOST_AUTO_TEST_CASE(DNSCryptPlaintextQueryInvalidA) {
DNSCryptPrivateKey resolverPrivateKey;
DNSCryptCert resolverCert;
unsigned char providerPublicKey[DNSCRYPT_PROVIDER_PUBLIC_KEY_SIZE];
unsigned char providerPrivateKey[DNSCRYPT_PROVIDER_PRIVATE_KEY_SIZE];
time_t now = time(nullptr);
DNSCryptContext::generateProviderKeys(providerPublicKey, providerPrivateKey);
DNSCryptContext::generateCertificate(1, now, now + (24 * 60 * 3600), DNSCryptExchangeVersion::VERSION1, providerPrivateKey, resolverPrivateKey, resolverCert);
auto ctx = std::make_shared<DNSCryptContext>("2.name", resolverCert, resolverPrivateKey);
DNSName name("2.name.");
PacketBuffer plainQuery;
GenericDNSPacketWriter<PacketBuffer> pw(plainQuery, name, QType::A, QClass::IN, 0);
pw.getHeader()->rd = 0;
std::shared_ptr<DNSCryptQuery> query = std::make_shared<DNSCryptQuery>(ctx);
query->parsePacket(plainQuery, false, now);
BOOST_CHECK_EQUAL(query->isValid(), false);
}
// invalid plaintext query (wrong provider name)
BOOST_AUTO_TEST_CASE(DNSCryptPlaintextQueryInvalidProviderName) {
DNSCryptPrivateKey resolverPrivateKey;
DNSCryptCert resolverCert;
unsigned char providerPublicKey[DNSCRYPT_PROVIDER_PUBLIC_KEY_SIZE];
unsigned char providerPrivateKey[DNSCRYPT_PROVIDER_PRIVATE_KEY_SIZE];
time_t now = time(nullptr);
DNSCryptContext::generateProviderKeys(providerPublicKey, providerPrivateKey);
DNSCryptContext::generateCertificate(1, now, now + (24 * 60 * 3600), DNSCryptExchangeVersion::VERSION1, providerPrivateKey, resolverPrivateKey, resolverCert);
auto ctx = std::make_shared<DNSCryptContext>("2.name", resolverCert, resolverPrivateKey);
DNSName name("2.WRONG.name.");
PacketBuffer plainQuery;
GenericDNSPacketWriter<PacketBuffer> pw(plainQuery, name, QType::TXT, QClass::IN, 0);
pw.getHeader()->rd = 0;
std::shared_ptr<DNSCryptQuery> query = std::make_shared<DNSCryptQuery>(ctx);
query->parsePacket(plainQuery, false, now);
BOOST_CHECK_EQUAL(query->isValid(), false);
}
// valid encrypted query
BOOST_AUTO_TEST_CASE(DNSCryptEncryptedQueryValid) {
DNSCryptPrivateKey resolverPrivateKey;
DNSCryptCert resolverCert;
unsigned char providerPublicKey[DNSCRYPT_PROVIDER_PUBLIC_KEY_SIZE];
unsigned char providerPrivateKey[DNSCRYPT_PROVIDER_PRIVATE_KEY_SIZE];
time_t now = time(nullptr);
DNSCryptContext::generateProviderKeys(providerPublicKey, providerPrivateKey);
DNSCryptContext::generateCertificate(1, now, now + (24 * 60 * 3600), DNSCryptExchangeVersion::VERSION1, providerPrivateKey, resolverPrivateKey, resolverCert);
auto ctx = std::make_shared<DNSCryptContext>("2.name", resolverCert, resolverPrivateKey);
DNSCryptPrivateKey clientPrivateKey;
unsigned char clientPublicKey[DNSCRYPT_PUBLIC_KEY_SIZE];
DNSCryptContext::generateResolverKeyPair(clientPrivateKey, clientPublicKey);
unsigned char clientNonce[DNSCRYPT_NONCE_SIZE / 2] = { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x08, 0x09, 0x0A, 0x0B };
DNSName name("www.powerdns.com.");
PacketBuffer plainQuery;
GenericDNSPacketWriter<PacketBuffer> pw(plainQuery, name, QType::AAAA, QClass::IN, 0);
pw.getHeader()->rd = 1;
size_t initialSize = plainQuery.size();
int res = ctx->encryptQuery(plainQuery, 4096, clientPublicKey, clientPrivateKey, clientNonce, false, std::make_shared<DNSCryptCert>(resolverCert));
BOOST_CHECK_EQUAL(res, 0);
BOOST_CHECK(plainQuery.size() > initialSize);
std::shared_ptr<DNSCryptQuery> query = std::make_shared<DNSCryptQuery>(ctx);
query->parsePacket(plainQuery, false, now);
BOOST_CHECK_EQUAL(query->isValid(), true);
BOOST_CHECK_EQUAL(query->isEncrypted(), true);
MOADNSParser mdp(true, (char*) plainQuery.data(), plainQuery.size());
BOOST_CHECK_EQUAL(mdp.d_header.qdcount, 1U);
BOOST_CHECK_EQUAL(mdp.d_header.ancount, 0U);
BOOST_CHECK_EQUAL(mdp.d_header.nscount, 0U);
BOOST_CHECK_EQUAL(mdp.d_header.arcount, 0U);
BOOST_CHECK_EQUAL(mdp.d_qname, name);
BOOST_CHECK(mdp.d_qclass == QClass::IN);
BOOST_CHECK(mdp.d_qtype == QType::AAAA);
}
// valid encrypted query with not enough room
BOOST_AUTO_TEST_CASE(DNSCryptEncryptedQueryValidButShort) {
DNSCryptPrivateKey resolverPrivateKey;
DNSCryptCert resolverCert;
unsigned char providerPublicKey[DNSCRYPT_PROVIDER_PUBLIC_KEY_SIZE];
unsigned char providerPrivateKey[DNSCRYPT_PROVIDER_PRIVATE_KEY_SIZE];
time_t now = time(nullptr);
DNSCryptContext::generateProviderKeys(providerPublicKey, providerPrivateKey);
DNSCryptContext::generateCertificate(1, now, now + (24 * 60 * 3600), DNSCryptExchangeVersion::VERSION1, providerPrivateKey, resolverPrivateKey, resolverCert);
auto ctx = std::make_shared<DNSCryptContext>("2.name", resolverCert, resolverPrivateKey);
DNSCryptPrivateKey clientPrivateKey;
unsigned char clientPublicKey[DNSCRYPT_PUBLIC_KEY_SIZE];
DNSCryptContext::generateResolverKeyPair(clientPrivateKey, clientPublicKey);
unsigned char clientNonce[DNSCRYPT_NONCE_SIZE / 2] = { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x08, 0x09, 0x0A, 0x0B };
DNSName name("www.powerdns.com.");
PacketBuffer plainQuery;
GenericDNSPacketWriter<PacketBuffer> pw(plainQuery, name, QType::AAAA, QClass::IN, 0);
pw.getHeader()->rd = 1;
int res = ctx->encryptQuery(plainQuery, /* not enough room */ plainQuery.size(), clientPublicKey, clientPrivateKey, clientNonce, false, std::make_shared<DNSCryptCert>(resolverCert));
BOOST_CHECK_EQUAL(res, ENOBUFS);
}
// valid encrypted query with old key
BOOST_AUTO_TEST_CASE(DNSCryptEncryptedQueryValidWithOldKey) {
DNSCryptPrivateKey resolverPrivateKey;
DNSCryptCert resolverCert;
unsigned char providerPublicKey[DNSCRYPT_PROVIDER_PUBLIC_KEY_SIZE];
unsigned char providerPrivateKey[DNSCRYPT_PROVIDER_PRIVATE_KEY_SIZE];
time_t now = time(nullptr);
DNSCryptContext::generateProviderKeys(providerPublicKey, providerPrivateKey);
DNSCryptContext::generateCertificate(1, now, now + (24 * 60 * 3600), DNSCryptExchangeVersion::VERSION1, providerPrivateKey, resolverPrivateKey, resolverCert);
auto ctx = std::make_shared<DNSCryptContext>("2.name", resolverCert, resolverPrivateKey);
DNSCryptPrivateKey clientPrivateKey;
unsigned char clientPublicKey[DNSCRYPT_PUBLIC_KEY_SIZE];
DNSCryptContext::generateResolverKeyPair(clientPrivateKey, clientPublicKey);
unsigned char clientNonce[DNSCRYPT_NONCE_SIZE / 2] = { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x08, 0x09, 0x0A, 0x0B };
DNSName name("www.powerdns.com.");
PacketBuffer plainQuery;
GenericDNSPacketWriter<PacketBuffer> pw(plainQuery, name, QType::AAAA, QClass::IN, 0);
pw.getHeader()->rd = 1;
size_t initialSize = plainQuery.size();
int res = ctx->encryptQuery(plainQuery, 4096, clientPublicKey, clientPrivateKey, clientNonce, false, std::make_shared<DNSCryptCert>(resolverCert));
BOOST_CHECK_EQUAL(res, 0);
BOOST_CHECK(plainQuery.size() > initialSize);
DNSCryptCert newResolverCert;
DNSCryptContext::generateCertificate(2, now, now + (24 * 60 * 3600), DNSCryptExchangeVersion::VERSION1, providerPrivateKey, resolverPrivateKey, newResolverCert);
ctx->addNewCertificate(newResolverCert, resolverPrivateKey);
ctx->markInactive(resolverCert.getSerial());
std::shared_ptr<DNSCryptQuery> query = std::make_shared<DNSCryptQuery>(ctx);
query->parsePacket(plainQuery, false, now);
BOOST_CHECK_EQUAL(query->isValid(), true);
BOOST_CHECK_EQUAL(query->isEncrypted(), true);
MOADNSParser mdp(true, (char*) plainQuery.data(), plainQuery.size());
BOOST_CHECK_EQUAL(mdp.d_header.qdcount, 1U);
BOOST_CHECK_EQUAL(mdp.d_header.ancount, 0U);
BOOST_CHECK_EQUAL(mdp.d_header.nscount, 0U);
BOOST_CHECK_EQUAL(mdp.d_header.arcount, 0U);
BOOST_CHECK_EQUAL(mdp.d_qname, name);
BOOST_CHECK(mdp.d_qclass == QClass::IN);
BOOST_CHECK(mdp.d_qtype == QType::AAAA);
}
// valid encrypted query with wrong key
BOOST_AUTO_TEST_CASE(DNSCryptEncryptedQueryInvalidWithWrongKey) {
DNSCryptPrivateKey resolverPrivateKey;
DNSCryptCert resolverCert;
unsigned char providerPublicKey[DNSCRYPT_PROVIDER_PUBLIC_KEY_SIZE];
unsigned char providerPrivateKey[DNSCRYPT_PROVIDER_PRIVATE_KEY_SIZE];
time_t now = time(nullptr);
DNSCryptContext::generateProviderKeys(providerPublicKey, providerPrivateKey);
DNSCryptContext::generateCertificate(1, now, now + (24 * 60 * 3600), DNSCryptExchangeVersion::VERSION1, providerPrivateKey, resolverPrivateKey, resolverCert);
auto ctx = std::make_shared<DNSCryptContext>("2.name", resolverCert, resolverPrivateKey);
DNSCryptPrivateKey clientPrivateKey;
unsigned char clientPublicKey[DNSCRYPT_PUBLIC_KEY_SIZE];
DNSCryptContext::generateResolverKeyPair(clientPrivateKey, clientPublicKey);
unsigned char clientNonce[DNSCRYPT_NONCE_SIZE / 2] = { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x08, 0x09, 0x0A, 0x0B };
DNSName name("www.powerdns.com.");
PacketBuffer plainQuery;
GenericDNSPacketWriter<PacketBuffer> pw(plainQuery, name, QType::AAAA, QClass::IN, 0);
pw.getHeader()->rd = 1;
size_t initialSize = plainQuery.size();
int res = ctx->encryptQuery(plainQuery, 4096, clientPublicKey, clientPrivateKey, clientNonce, false, std::make_shared<DNSCryptCert>(resolverCert));
BOOST_CHECK_EQUAL(res, 0);
BOOST_CHECK(plainQuery.size() > initialSize);
DNSCryptCert newResolverCert;
DNSCryptContext::generateCertificate(2, now, now + (24 * 60 * 3600), DNSCryptExchangeVersion::VERSION1, providerPrivateKey, resolverPrivateKey, newResolverCert);
ctx->addNewCertificate(newResolverCert, resolverPrivateKey);
ctx->markInactive(resolverCert.getSerial());
ctx->removeInactiveCertificate(resolverCert.getSerial());
/* we have removed the old certificate, we can't decrypt this query */
std::shared_ptr<DNSCryptQuery> query = std::make_shared<DNSCryptQuery>(ctx);
query->parsePacket(plainQuery, false, now);
BOOST_CHECK_EQUAL(query->isValid(), false);
}
#endif
BOOST_AUTO_TEST_SUITE_END();
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