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// Copyright (C) 2010-2015 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 <exceptions/exceptions.h>
#include <util/buffer.h>
#include <dns/exceptions.h>
#include <dns/messagerenderer.h>
#include <dns/rdata.h>
#include <dns/rdataclass.h>
#include <dns/rrclass.h>
#include <dns/rrtype.h>
#include <gtest/gtest.h>
#include <dns/tests/unittest_util.h>
#include <dns/tests/rdata_unittest.h>
using isc::UnitTestUtil;
using namespace std;
using namespace isc;
using namespace isc::dns;
using namespace isc::util;
using namespace isc::dns::rdata;
namespace {
// Note: some tests can be shared with NSEC3PARAM. They are unified as
// typed tests defined in nsec3param_like_unittest.
class Rdata_NSEC3_Test : public RdataTest {
protected:
Rdata_NSEC3_Test() :
nsec3_txt("1 1 1 D399EAAB H9RSFB7FPF2L8HG35CMPC765TDK23RP6 "
"A NS SOA"),
nsec3_nosalt_txt("1 1 1 - H9RSFB7FPF2L8HG35CMPC765TDK23RP6 A NS SOA"),
nsec3_notype_txt("1 1 1 D399EAAB H9RSFB7FPF2L8HG35CMPC765TDK23RP6"),
rdata_nsec3(nsec3_txt)
{}
void checkFromText_None(const string& rdata_str) {
checkFromText<generic::NSEC3, isc::Exception, isc::Exception>(
rdata_str, rdata_nsec3, false, false);
}
void checkFromText_InvalidText(const string& rdata_str) {
checkFromText<generic::NSEC3, InvalidRdataText, InvalidRdataText>(
rdata_str, rdata_nsec3, true, true);
}
void checkFromText_BadValue(const string& rdata_str) {
checkFromText<generic::NSEC3, BadValue, BadValue>(
rdata_str, rdata_nsec3, true, true);
}
void checkFromText_LexerError(const string& rdata_str) {
checkFromText
<generic::NSEC3, InvalidRdataText, MasterLexer::LexerError>(
rdata_str, rdata_nsec3, true, true);
}
void checkFromText_BadString(const string& rdata_str) {
checkFromText
<generic::NSEC3, InvalidRdataText, isc::Exception>(
rdata_str, rdata_nsec3, true, false);
}
const string nsec3_txt;
const string nsec3_nosalt_txt;
const string nsec3_notype_txt;
const generic::NSEC3 rdata_nsec3;
};
TEST_F(Rdata_NSEC3_Test, fromText) {
// Hash that has the possible max length
EXPECT_EQ(255, generic::NSEC3("1 1 1 D399EAAB " +
string((255 * 8) / 5, '0') +
" NS").getNext().size());
// Hash is too long. Max = 255 bytes, base32-hex converts each 5 bytes
// of the original to 8 characters, so 260 * 8 / 5 is the smallest length
// of the encoded string that exceeds the max and doesn't require padding.
checkFromText_InvalidText("1 1 1 D399EAAB " + string((260 * 8) / 5, '0') +
" A NS SOA");
// Type bitmap is empty. it's possible and allowed for NSEC3.
EXPECT_NO_THROW(const generic::NSEC3 rdata_notype_nsec3(nsec3_notype_txt));
// Empty salt is also okay.
EXPECT_NO_THROW(const generic::NSEC3 rdata_nosalt_nsec3(nsec3_nosalt_txt));
// Bad type mnemonics
checkFromText_InvalidText("1 1 1 D399EAAB H9RSFB7FPF2L8HG35CMPC765TDK23RP6"
" BIFF POW SPOON");
// Bad base32hex
checkFromText_BadValue("1 1 1 D399EAAB "
"WXYZWXYZWXYZ=WXYZWXYZ==WXYZWXYZW A NS SOA");
// Hash algorithm out of range
checkFromText_InvalidText("256 1 1 D399EAAB "
"H9RSFB7FPF2L8HG35CMPC765TDK23RP6 A NS SOA");
// Flags out of range
checkFromText_InvalidText("1 256 1 D399EAAB "
"H9RSFB7FPF2L8HG35CMPC765TDK23RP6 A NS SOA");
// Iterations out of range
checkFromText_InvalidText("1 1 65536 D399EAAB "
"H9RSFB7FPF2L8HG35CMPC765TDK23RP6 A NS SOA");
// Space is not allowed in salt or the next hash. This actually
// causes the Base32 decoder that parses the next hash that comes
// afterwards, to throw.
checkFromText_BadValue("1 1 1 D399 EAAB H9RSFB7FPF2L8"
"HG35CMPC765TDK23RP6 A NS SOA");
// Next hash must not contain padding (trailing '=' characters)
checkFromText_InvalidText("1 1 1 D399EAAB "
"AAECAwQFBgcICQoLDA0ODw== A NS SOA");
// String instead of number
checkFromText_LexerError("foo 1 1 D399EAAB "
"H9RSFB7FPF2L8HG35CMPC765TDK23RP6 A NS SOA");
checkFromText_LexerError("1 foo 1 D399EAAB "
"H9RSFB7FPF2L8HG35CMPC765TDK23RP6 A NS SOA");
checkFromText_LexerError("1 1 foo D399EAAB "
"H9RSFB7FPF2L8HG35CMPC765TDK23RP6 A NS SOA");
// Trailing garbage. This should cause only the string constructor
// to fail, but the lexer constructor must be able to continue
// parsing from it.
checkFromText_BadString(
"1 1 1 D399EAAB H9RSFB7FPF2L8HG35CMPC765TDK23RP6 A NS SOA ;comment\n"
"1 1 1 D399EAAB H9RSFB7FPF2L8HG35CMPC765TDK23RP6 A NS SOA");
// Unmatched parenthesis should cause a lexer error
checkFromText_LexerError("1 1 1 D399EAAB "
"H9RSFB7FPF2L8HG35CMPC765TDK23RP6 A ) NS SOA");
}
TEST_F(Rdata_NSEC3_Test, createFromWire) {
// A valid NSEC3 RR with empty type bitmap.
EXPECT_NO_THROW(rdataFactoryFromFile(RRType::NSEC3(), RRClass::IN(),
"rdata_nsec3_fromWire15.wire"));
// Invalid bitmap cases are tested in Rdata_NSECBITMAP_Test.
// hash length is too large
EXPECT_THROW(rdataFactoryFromFile(RRType::NSEC3(), RRClass::IN(),
"rdata_nsec3_fromWire12.wire"),
DNSMessageFORMERR);
// empty hash. invalid.
EXPECT_THROW(rdataFactoryFromFile(RRType::NSEC3(), RRClass::IN(),
"rdata_nsec3_fromWire14.wire"),
DNSMessageFORMERR);
// RDLEN is too short to hold the hash length field
EXPECT_THROW(rdataFactoryFromFile(RRType::NSEC3(), RRClass::IN(),
"rdata_nsec3_fromWire17.wire"),
DNSMessageFORMERR);
// Short buffer cases. The data is valid NSEC3 RDATA, but the buffer
// is trimmed at the end. All cases should result in an exception from
// the buffer class.
vector<uint8_t> data;
UnitTestUtil::readWireData("rdata_nsec3_fromWire1", data);
const uint16_t rdlen = (data.at(0) << 8) + data.at(1);
for (int i = 0; i < rdlen; ++i) {
// intentionally construct a short buffer
InputBuffer b(&data[0] + 2, i);
EXPECT_THROW(createRdata(RRType::NSEC3(), RRClass::IN(), b, 39),
InvalidBufferPosition);
}
}
TEST_F(Rdata_NSEC3_Test, createFromLexer) {
EXPECT_EQ(0, rdata_nsec3.compare(
*test::createRdataUsingLexer(RRType::NSEC3(), RRClass::IN(),
nsec3_txt)));
// empty salt is also okay.
const generic::NSEC3 rdata_nosalt_nsec3(nsec3_nosalt_txt);
EXPECT_EQ(0, rdata_nosalt_nsec3.compare(
*test::createRdataUsingLexer(RRType::NSEC3(), RRClass::IN(),
nsec3_nosalt_txt)));
}
TEST_F(Rdata_NSEC3_Test, assign) {
generic::NSEC3 other_nsec3 = rdata_nsec3;
EXPECT_EQ(0, rdata_nsec3.compare(other_nsec3));
}
TEST_F(Rdata_NSEC3_Test, compare) {
// trivial case: self equivalence
EXPECT_EQ(0, generic::NSEC3(nsec3_txt).compare(generic::NSEC3(nsec3_txt)));
// comparison attempt between incompatible RR types should be rejected
EXPECT_THROW(generic::NSEC3(nsec3_txt).compare(*rdata_nomatch),
bad_cast);
// test RDATAs, sorted in the ascending order. We only check comparison
// on NSEC3-specific fields. Bitmap comparison is tested in the bitmap
// tests. Common cases for NSEC3 and NSECPARAM3 are in their shared tests.
vector<generic::NSEC3> compare_set;
compare_set.push_back(generic::NSEC3("1 1 1 FF99EA0000 D1K6GQ38"));
compare_set.push_back(generic::NSEC3("1 1 1 FF99EA0000 D1K6GQ0000000000"));
compare_set.push_back(generic::NSEC3("1 1 1 FF99EA0000 D1K6GQ00UUUUUUUU"));
vector<generic::NSEC3>::const_iterator it;
const vector<generic::NSEC3>::const_iterator it_end = compare_set.end();
for (it = compare_set.begin(); it != it_end - 1; ++it) {
SCOPED_TRACE("compare " + it->toText() + " to " + (it + 1)->toText());
EXPECT_GT(0, (*it).compare(*(it + 1)));
EXPECT_LT(0, (*(it + 1)).compare(*it));
}
}
}
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