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// Copyright (C) 2012 Internet Systems Consortium, Inc. ("ISC")
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.
#include <string>
#include <gtest/gtest.h>
#include <boost/scoped_ptr.hpp>
#include <dns/nsec3hash.h>
#include <dns/labelsequence.h>
#include <dns/rdataclass.h>
#include <util/encode/hex.h>
using boost::scoped_ptr;
using namespace std;
using namespace isc::dns;
using namespace isc::dns::rdata;
using namespace isc::util;
using namespace isc::util::encode;
namespace {
typedef scoped_ptr<NSEC3Hash> NSEC3HashPtr;
// Commonly used NSEC3 suffix, defined to reduce the amount of typing
const char* const nsec3_common = "2T7B4G4VSA5SMI47K61MV5BV1A22BOJR A RRSIG";
class NSEC3HashTest : public ::testing::Test {
protected:
NSEC3HashTest() :
test_hash(NSEC3Hash::create(generic::NSEC3PARAM("1 0 12 aabbccdd"))),
test_hash_nsec3(NSEC3Hash::create(generic::NSEC3
("1 0 12 aabbccdd " +
string(nsec3_common))))
{
const uint8_t salt[] = {0xaa, 0xbb, 0xcc, 0xdd};
test_hash_args.reset(NSEC3Hash::create(1, 12, salt, sizeof(salt)));
}
~NSEC3HashTest() {
// Make sure we reset the hash creator to the default
setNSEC3HashCreator(NULL);
}
// An NSEC3Hash object commonly used in tests. Parameters are borrowed
// from the RFC5155 example. Construction of this object implicitly
// checks a successful case of the creation.
NSEC3HashPtr test_hash;
// Similar to test_hash, but created from NSEC3 RR.
NSEC3HashPtr test_hash_nsec3;
// Similar to test_hash, but created from passed args.
NSEC3HashPtr test_hash_args;
};
TEST_F(NSEC3HashTest, unknownAlgorithm) {
EXPECT_THROW(NSEC3HashPtr(
NSEC3Hash::create(
generic::NSEC3PARAM("2 0 12 aabbccdd"))),
UnknownNSEC3HashAlgorithm);
EXPECT_THROW(NSEC3HashPtr(
NSEC3Hash::create(
generic::NSEC3("2 0 12 aabbccdd " +
string(nsec3_common)))),
UnknownNSEC3HashAlgorithm);
const uint8_t salt[] = {0xaa, 0xbb, 0xcc, 0xdd};
EXPECT_THROW(NSEC3HashPtr(NSEC3Hash::create(2, 12, salt, sizeof(salt))),
UnknownNSEC3HashAlgorithm);
}
// Common checks for NSEC3 hash calculation
void
calculateCheck(NSEC3Hash& hash) {
// A couple of normal cases from the RFC5155 example.
EXPECT_EQ("0P9MHAVEQVM6T7VBL5LOP2U3T2RP3TOM",
hash.calculate(Name("example")));
EXPECT_EQ("35MTHGPGCU1QG68FAB165KLNSNK3DPVL",
hash.calculate(Name("a.example")));
// Check case-insensitiveness
EXPECT_EQ("0P9MHAVEQVM6T7VBL5LOP2U3T2RP3TOM",
hash.calculate(Name("EXAMPLE")));
// Repeat for the LabelSequence variant.
// A couple of normal cases from the RFC5155 example.
EXPECT_EQ("0P9MHAVEQVM6T7VBL5LOP2U3T2RP3TOM",
hash.calculate(LabelSequence(Name("example"))));
EXPECT_EQ("35MTHGPGCU1QG68FAB165KLNSNK3DPVL",
hash.calculate(LabelSequence(Name("a.example"))));
// Check case-insensitiveness
EXPECT_EQ("0P9MHAVEQVM6T7VBL5LOP2U3T2RP3TOM",
hash.calculate(LabelSequence(Name("EXAMPLE"))));
}
TEST_F(NSEC3HashTest, calculate) {
{
SCOPED_TRACE("calculate check with NSEC3PARAM based hash");
calculateCheck(*test_hash);
}
{
SCOPED_TRACE("calculate check with NSEC3 based hash");
calculateCheck(*test_hash_nsec3);
}
{
SCOPED_TRACE("calculate check with args based hash");
calculateCheck(*test_hash_args);
}
// Some boundary cases: 0-iteration and empty salt. Borrowed from the
// .com zone data.
EXPECT_EQ("CK0POJMG874LJREF7EFN8430QVIT8BSM",
NSEC3HashPtr(NSEC3Hash::create(generic::NSEC3PARAM("1 0 0 -")))
->calculate(Name("com")));
EXPECT_EQ("CK0POJMG874LJREF7EFN8430QVIT8BSM",
NSEC3HashPtr(NSEC3Hash::create(generic::NSEC3PARAM("1 0 0 -")))
->calculate(LabelSequence(Name("com"))));
// Using unusually large iterations, something larger than the 8-bit range.
// (expected hash value generated by BIND 9's dnssec-signzone)
EXPECT_EQ("COG6A52MJ96MNMV3QUCAGGCO0RHCC2Q3",
NSEC3HashPtr(NSEC3Hash::create(
generic::NSEC3PARAM("1 0 256 AABBCCDD")))
->calculate(LabelSequence(Name("example.org"))));
}
// Common checks for match cases
template <typename RDATAType>
void
matchCheck(NSEC3Hash& hash, const string& postfix) {
// If all parameters match, it's considered to be matched.
EXPECT_TRUE(hash.match(RDATAType("1 0 12 aabbccdd" + postfix)));
// Algorithm doesn't match
EXPECT_FALSE(hash.match(RDATAType("2 0 12 aabbccdd" + postfix)));
// Iterations doesn't match
EXPECT_FALSE(hash.match(RDATAType("1 0 1 aabbccdd" + postfix)));
// Salt doesn't match
EXPECT_FALSE(hash.match(RDATAType("1 0 12 aabbccde" + postfix)));
// Salt doesn't match: the other has an empty salt
EXPECT_FALSE(hash.match(RDATAType("1 0 12 -" + postfix)));
// Flags don't matter
EXPECT_TRUE(hash.match(RDATAType("1 1 12 aabbccdd" + postfix)));
}
TEST_F(NSEC3HashTest, matchWithNSEC3) {
{
SCOPED_TRACE("match NSEC3PARAM based hash against NSEC3 parameters");
matchCheck<generic::NSEC3>(*test_hash, " " + string(nsec3_common));
}
{
SCOPED_TRACE("match NSEC3 based hash against NSEC3 parameters");
matchCheck<generic::NSEC3>(*test_hash_nsec3,
" " + string(nsec3_common));
}
}
TEST_F(NSEC3HashTest, matchWithNSEC3PARAM) {
{
SCOPED_TRACE("match NSEC3PARAM based hash against NSEC3 parameters");
matchCheck<generic::NSEC3PARAM>(*test_hash, "");
}
{
SCOPED_TRACE("match NSEC3 based hash against NSEC3 parameters");
matchCheck<generic::NSEC3PARAM>(*test_hash_nsec3, "");
}
}
// A simple faked hash calculator and a dedicated creator for it.
class TestNSEC3Hash : public NSEC3Hash {
virtual string calculate(const Name&) const {
return ("00000000000000000000000000000000");
}
virtual string calculate(const LabelSequence&) const {
return ("00000000000000000000000000000000");
}
virtual bool match(const generic::NSEC3PARAM&) const {
return (true);
}
virtual bool match(const generic::NSEC3&) const {
return (true);
}
};
// This faked creator basically creates the faked calculator regardless of
// the passed NSEC3PARAM or NSEC3. But if the most significant bit of flags
// is set, it will behave like the default creator.
class TestNSEC3HashCreator : public NSEC3HashCreator {
public:
virtual NSEC3Hash* create(const generic::NSEC3PARAM& param) const {
if ((param.getFlags() & 0x80) != 0) {
return (default_creator_.create(param));
}
return (new TestNSEC3Hash);
}
virtual NSEC3Hash* create(const generic::NSEC3& nsec3) const {
if ((nsec3.getFlags() & 0x80) != 0) {
return (default_creator_.create(nsec3));
}
return (new TestNSEC3Hash);
}
virtual NSEC3Hash* create(uint8_t, uint16_t,
const uint8_t*, size_t) const {
isc_throw(isc::Unexpected,
"This method is not implemented here.");
}
private:
DefaultNSEC3HashCreator default_creator_;
};
TEST_F(NSEC3HashTest, setCreator) {
// Re-check an existing case using the default creator/hash implementation
EXPECT_EQ("0P9MHAVEQVM6T7VBL5LOP2U3T2RP3TOM",
test_hash->calculate(Name("example")));
EXPECT_EQ("0P9MHAVEQVM6T7VBL5LOP2U3T2RP3TOM",
test_hash->calculate(LabelSequence(Name("example"))));
// Replace the creator, and confirm the hash values are faked
TestNSEC3HashCreator test_creator;
setNSEC3HashCreator(&test_creator);
// Re-create the hash object with the new creator
test_hash.reset(NSEC3Hash::create(generic::NSEC3PARAM("1 0 12 aabbccdd")));
EXPECT_EQ("00000000000000000000000000000000",
test_hash->calculate(Name("example")));
EXPECT_EQ("00000000000000000000000000000000",
test_hash->calculate(LabelSequence(Name("example"))));
// Same for hash from NSEC3 RDATA
test_hash.reset(NSEC3Hash::create(generic::NSEC3
("1 0 12 aabbccdd " +
string(nsec3_common))));
EXPECT_EQ("00000000000000000000000000000000",
test_hash->calculate(Name("example")));
EXPECT_EQ("00000000000000000000000000000000",
test_hash->calculate(LabelSequence(Name("example"))));
// If we set a special flag big (0x80) on creation, it will act like the
// default creator.
test_hash.reset(NSEC3Hash::create(generic::NSEC3PARAM(
"1 128 12 aabbccdd")));
EXPECT_EQ("0P9MHAVEQVM6T7VBL5LOP2U3T2RP3TOM",
test_hash->calculate(Name("example")));
EXPECT_EQ("0P9MHAVEQVM6T7VBL5LOP2U3T2RP3TOM",
test_hash->calculate(LabelSequence(Name("example"))));
test_hash.reset(NSEC3Hash::create(generic::NSEC3
("1 128 12 aabbccdd " +
string(nsec3_common))));
EXPECT_EQ("0P9MHAVEQVM6T7VBL5LOP2U3T2RP3TOM",
test_hash->calculate(Name("example")));
EXPECT_EQ("0P9MHAVEQVM6T7VBL5LOP2U3T2RP3TOM",
test_hash->calculate(LabelSequence(Name("example"))));
// Reset the creator to default, and confirm that
setNSEC3HashCreator(NULL);
test_hash.reset(NSEC3Hash::create(generic::NSEC3PARAM("1 0 12 aabbccdd")));
EXPECT_EQ("0P9MHAVEQVM6T7VBL5LOP2U3T2RP3TOM",
test_hash->calculate(Name("example")));
EXPECT_EQ("0P9MHAVEQVM6T7VBL5LOP2U3T2RP3TOM",
test_hash->calculate(LabelSequence(Name("example"))));
}
} // end namespace
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