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651 | // Copyright (C) 2021-2024 Internet Systems Consortium, Inc. ("ISC")
//
// This Source Code Form is subject to the terms of the Kea Hooks Basic
// Commercial End User License Agreement v2.0. See COPYING file in the premium/
// directory.
#include <config.h>
#include <dns/name.h>
#include <dns/message.h>
#include <dns/messagerenderer.h>
#include <dns/opcode.h>
#include <gss_tsig_context.h><--- Include file: not found. Please note: Cppcheck does not need standard library headers to get proper results.
#include <gss_tsig_api_utils.h><--- Include file: not found. Please note: Cppcheck does not need standard library headers to get proper results.
#include <testutils/gtest_utils.h>
#include <gtest/gtest.h><--- Include file: not found. Please note: Cppcheck does not need standard library headers to get proper results.
using namespace std;
using namespace isc;
using namespace isc::cryptolink;
using namespace isc::dns;
using namespace isc::dns::rdata::any;
using namespace isc::gss_tsig;
using namespace isc::gss_tsig::test;
using namespace isc::util;
/// @todo this is defined as class static constants, but some compilers
/// seemingly cannot find the symbol when used in the EXPECT_xxx macros.
const uint16_t TSIGContext::DEFAULT_FUDGE;
namespace {
/// @brief Test fixture for testing the GSS-TSIG key.
class GssTsigContextTest : public GssApiBaseTest {
public:
/// @brief Constructor.
GssTsigContextTest() : GssApiBaseTest(), message_(Message::RENDER) {
}
/// @brief Destructor.
~GssTsigContextTest() {
}
/// @brief The message used for signing.
Message message_;
};
/// @brief Check the constructor builds what is expected.
TEST_F(GssTsigContextTest, basic) {<--- syntax error
GssTsigKeyPtr key;
string name = "1234.sig-foo.example.com.";
ASSERT_NO_THROW(key.reset(new GssTsigKey(name)));
ASSERT_TRUE(key);
GssTsigContextPtr ctx;
ASSERT_NO_THROW(ctx.reset(new GssTsigContext(*key)));
ASSERT_TRUE(ctx);
// Verify context.
EXPECT_EQ(TSIGContext::INIT, ctx->getState());
EXPECT_EQ(TSIGError::NOERROR(), ctx->getError());
// Length is 26 + 26 + 10 + 128 + 0 = 190.
EXPECT_EQ(190, ctx->getTSIGLength());
}
/// @brief Check sign direct errors.
TEST_F(GssTsigContextTest, signError) {
GssTsigKeyPtr key;
string name = "1234.sig-foo.example.com.";
ASSERT_NO_THROW(key.reset(new GssTsigKey(name)));
ASSERT_TRUE(key);
GssTsigContextPtr ctx;
ASSERT_NO_THROW(ctx.reset(new GssTsigContext(*key)));
ASSERT_TRUE(ctx);
// VERIFIED_RESPONSE state is not allowed.
ctx->setState(TSIGContext::VERIFIED_RESPONSE);
EXPECT_EQ(TSIGContext::VERIFIED_RESPONSE, ctx->getState());
EXPECT_THROW_MSG(ctx->sign(0x1234, 0, 0), TSIGContextError,
"TSIG sign attempt after verifying a response");
// Data must not be empty.
ctx->setState(TSIGContext::INIT);
EXPECT_THROW_MSG(ctx->sign(0x1234, 0, 100), InvalidParameter,
"TSIG sign error: empty data is given");
EXPECT_THROW_MSG(ctx->sign(0x1234, &name[0], 0), InvalidParameter,
"TSIG sign error: empty data is given");
}
/// @brief Check verify direct errors.
TEST_F(GssTsigContextTest, verifyError) {
GssTsigKeyPtr key;
string name = "1234.sig-foo.example.com.";
ASSERT_NO_THROW(key.reset(new GssTsigKey(name)));
ASSERT_TRUE(key);
GssTsigContextPtr ctx;
ASSERT_NO_THROW(ctx.reset(new GssTsigContext(*key)));
ASSERT_TRUE(ctx);
// SENT_RESPONSE state is not allowed.
ctx->setState(TSIGContext::SENT_RESPONSE);
EXPECT_EQ(TSIGContext::SENT_RESPONSE, ctx->getState());
EXPECT_THROW_MSG(ctx->verify(0, 0, 0), TSIGContextError,
"TSIG verify attempt after sending a response");
}
/// @brief Check lastHadSignature requires some history.
TEST_F(GssTsigContextTest, lastHadSignature) {
GssTsigKeyPtr key;
string name = "1234.sig-foo.example.com.";
ASSERT_NO_THROW(key.reset(new GssTsigKey(name)));
ASSERT_TRUE(key);
GssTsigContextPtr ctx;
ASSERT_NO_THROW(ctx.reset(new GssTsigContext(*key)));
ASSERT_TRUE(ctx);
EXPECT_THROW_MSG(ctx->lastHadSignature(), TSIGContextError,
"No message was verified yet");
}
/// @brief Check unsigned response.
TEST_F(GssTsigContextTest, unsigned) {
GssTsigKeyPtr key;
string name = "1234.sig-foo.example.com.";
ASSERT_NO_THROW(key.reset(new GssTsigKey(name)));
ASSERT_TRUE(key);
GssTsigContextPtr ctx;
ASSERT_NO_THROW(ctx.reset(new GssTsigContext(*key)));
ASSERT_TRUE(ctx);
// BAD_SIG gives an unsigned response.
ctx->setError(TSIGError::BAD_SIG());
ctx->setState(TSIGContext::RECEIVED_REQUEST);
EXPECT_EQ(TSIGError::BAD_SIG(), ctx->getError());
ConstTSIGRecordPtr tsig;
const string& dummy = "dummy";
uint64_t before = static_cast<uint64_t>(time(0));
ASSERT_NO_THROW(tsig = ctx->sign(0x1234, dummy.c_str(), dummy.size()));
uint64_t after = static_cast<uint64_t>(time(0));
ASSERT_TRUE(tsig);
EXPECT_EQ(Name(name), tsig->getName());
EXPECT_EQ(RRClass::ANY(), tsig->getClass());
EXPECT_EQ(0, tsig->getTTL().getValue());
// Length is 26 + 26 + 10 = 62.
EXPECT_EQ(62, tsig->getLength());
const TSIG& rdata = tsig->getRdata();
EXPECT_EQ(Name("gss-tsig."), rdata.getAlgorithm());
EXPECT_LE(before, rdata.getTimeSigned());
EXPECT_GE(after, rdata.getTimeSigned());
EXPECT_EQ(TSIGContext::DEFAULT_FUDGE, rdata.getFudge());
EXPECT_EQ(0, rdata.getMACSize());
EXPECT_FALSE(rdata.getMAC());
EXPECT_EQ(0x1234, rdata.getOriginalID());
EXPECT_EQ(TSIGError::BAD_SIG_CODE, rdata.getError());
EXPECT_EQ(0, rdata.getOtherLen());
EXPECT_FALSE(rdata.getOtherData());
EXPECT_EQ(TSIGContext::SENT_RESPONSE, ctx->getState());
EXPECT_EQ(TSIGError::BAD_SIG(), ctx->getError());
// Reset the context.
ASSERT_NO_THROW(ctx.reset(new GssTsigContext(*key)));
ASSERT_TRUE(ctx);
// BAD_KEY also gives an unsigned response.
ctx->setError(TSIGError::BAD_KEY());
ctx->setState(TSIGContext::RECEIVED_REQUEST);
EXPECT_EQ(TSIGError::BAD_KEY(), ctx->getError());
before = static_cast<uint64_t>(time(0));
ASSERT_NO_THROW(tsig = ctx->sign(0x1234, dummy.c_str(), dummy.size()));
after = static_cast<uint64_t>(time(0));
ASSERT_TRUE(tsig);
EXPECT_EQ(Name(name), tsig->getName());
EXPECT_EQ(RRClass::ANY(), tsig->getClass());
EXPECT_EQ(0, tsig->getTTL().getValue());
// Length is 26 + 26 + 10 = 62.
EXPECT_EQ(62, tsig->getLength());
const TSIG& rdata2 = tsig->getRdata();
EXPECT_EQ(Name("gss-tsig."), rdata2.getAlgorithm());
EXPECT_LE(before, rdata2.getTimeSigned());
EXPECT_GE(after, rdata2.getTimeSigned());
EXPECT_EQ(TSIGContext::DEFAULT_FUDGE, rdata2.getFudge());
EXPECT_EQ(0, rdata2.getMACSize());
EXPECT_FALSE(rdata2.getMAC());
EXPECT_EQ(0x1234, rdata2.getOriginalID());
EXPECT_EQ(TSIGError::BAD_KEY_CODE, rdata2.getError());
EXPECT_EQ(0, rdata2.getOtherLen());
EXPECT_FALSE(rdata2.getOtherData());
EXPECT_EQ(TSIGContext::SENT_RESPONSE, ctx->getState());
EXPECT_EQ(TSIGError::BAD_KEY(), ctx->getError());
}
/// @brief Check that a security context is required to sign.
TEST_F(GssTsigContextTest, signNoSecCtx) {
GssTsigKeyPtr key;
string name = "1234.sig-foo.example.com.";
ASSERT_NO_THROW(key.reset(new GssTsigKey(name)));
ASSERT_TRUE(key);
GssTsigContextPtr ctx;
ASSERT_NO_THROW(ctx.reset(new GssTsigContext(*key)));
ASSERT_TRUE(ctx);
const string& dummy = "dummy";
EXPECT_THROW_MSG(ctx->sign(0x1234, dummy.c_str(), dummy.size()),
Unexpected,
"sign called with null security context");
}
/// @brief Check that verify no TSIG record is only for continuation.
TEST_F(GssTsigContextTest, verifyNoRecord) {
GssTsigKeyPtr key;
string name = "1234.sig-foo.example.com.";
ASSERT_NO_THROW(key.reset(new GssTsigKey(name)));
ASSERT_TRUE(key);
GssTsigContextPtr ctx;
ASSERT_NO_THROW(ctx.reset(new GssTsigContext(*key)));
ASSERT_TRUE(ctx);
const string& dummy = "dummy";
TSIGError error = TSIGError::NOERROR();
EXPECT_NO_THROW(error = ctx->verify(0, dummy.c_str(), dummy.size()));
EXPECT_EQ(TSIGError::FORMERR(), error);
EXPECT_EQ(TSIGContext::RECEIVED_REQUEST, ctx->getState());
EXPECT_EQ(TSIGError::FORMERR(), ctx->getError());
}
/// @brief Check that verify rejects too short data.
TEST_F(GssTsigContextTest, verifyBadData) {
GssTsigKeyPtr key;
string name = "1234.sig-foo.example.com.";
ASSERT_NO_THROW(key.reset(new GssTsigKey(name)));
ASSERT_TRUE(key);
GssTsigContextPtr ctx;
ASSERT_NO_THROW(ctx.reset(new GssTsigContext(*key)));
ASSERT_TRUE(ctx);
const uint64_t now = static_cast<uint64_t>(time(0));
ConstTSIGRecordPtr tsig(new
TSIGRecord(key->getKeyName(),
TSIG(key->getAlgorithmName(),
now, TSIGContext::DEFAULT_FUDGE, 0, 0,
0x1234, 0, 0, 0)));
const size_t MESSAGE_HEADER_LEN = 12;
size_t len = MESSAGE_HEADER_LEN + tsig->getLength();
// len is 12 + 26 + 26 + 10 = 74.
EXPECT_EQ(74, len);
EXPECT_THROW_MSG(ctx->verify(tsig.get(), 0, len - 1), InvalidParameter,
"TSIG verify: data length is invalid: 73");
EXPECT_THROW_MSG(ctx->verify(tsig.get(), 0, len), InvalidParameter,
"TSIG verify: empty data is invalid");
}
/// @brief Check that a security context is required to verify.
TEST_F(GssTsigContextTest, verifyNoSecCtx) {
GssTsigKeyPtr key;
string name = "1234.sig-foo.example.com.";
ASSERT_NO_THROW(key.reset(new GssTsigKey(name)));
ASSERT_TRUE(key);
GssTsigContextPtr ctx;
ASSERT_NO_THROW(ctx.reset(new GssTsigContext(*key)));
ASSERT_TRUE(ctx);
const uint64_t now = static_cast<uint64_t>(time(0));
ConstTSIGRecordPtr tsig(new
TSIGRecord(key->getKeyName(),
TSIG(key->getAlgorithmName(),
now, TSIGContext::DEFAULT_FUDGE, 0, 0,
0x1234, 0, 0, 0)));
const size_t MESSAGE_HEADER_LEN = 12;
size_t len = MESSAGE_HEADER_LEN + tsig->getLength();
string dummy(len, ' ');
EXPECT_THROW_MSG(ctx->verify(tsig.get(), dummy.c_str(), len), Unexpected,
"verify called with null security context");
}
/// @brief Check that sign works as expected.
TEST_F(GssTsigContextTest, sign) {
GssTsigKeyPtr key;
string name = "1234.sig-foo.example.com.";
ASSERT_NO_THROW(key.reset(new GssTsigKey(name)));
ASSERT_TRUE(key);
setKeytab();
setAdministratorCCache();
// Server.
GssApiName srv_name("DNS/blu.example.nil@EXAMPLE.NIL");
OM_uint32 lifetime = 0;
GssApiCredPtr srv_cred(new GssApiCred(srv_name, GSS_C_ACCEPT, lifetime));
GssApiSecCtx srv_ctx(GSS_C_NO_CONTEXT);
// Client.
GssApiName clnt_name;
GssApiCredPtr cred;
EXPECT_FALSE(key->getSecCtx().get());
OM_uint32 flags = GSS_C_REPLAY_FLAG | GSS_C_MUTUAL_FLAG | GSS_C_INTEG_FLAG;
bool ret = false;
// Exchanges.
GssApiBuffer intoken0;
GssApiBuffer outtoken0;
ASSERT_NO_THROW(ret = key->getSecCtx().init(cred, srv_name, flags,
intoken0, outtoken0,
lifetime));
ASSERT_FALSE(outtoken0.empty());
GssApiBuffer outtoken1;
ASSERT_NO_THROW(ret = srv_ctx.accept(*srv_cred, outtoken0, clnt_name,
outtoken1));
EXPECT_TRUE(ret);
GssApiBuffer outtoken2;
ASSERT_NO_THROW(ret = key->getSecCtx().init(cred, srv_name, flags,
outtoken1, outtoken2,
lifetime));
ASSERT_TRUE(ret);
EXPECT_TRUE(outtoken2.empty());
// Build the message to sign.
message_.clear(Message::RENDER);
message_.setQid(0x1234);
message_.setOpcode(Opcode::QUERY());
message_.setRcode(Rcode::NOERROR());
message_.setHeaderFlag(Message::HEADERFLAG_QR);
Name qname("foo.example.nil.");
message_.addQuestion(Question(qname, RRClass::IN(), RRType::A()));
MessageRenderer renderer;
OutputBuffer buf(1024);
renderer.setBuffer(&buf);
EXPECT_NO_THROW(message_.toWire(renderer));
// len is 12 + 17 + 4 = 33
ASSERT_TRUE(buf.getData());
EXPECT_EQ(33, buf.getLength());
// Sign.
GssTsigContextPtr ctx;
ASSERT_NO_THROW(ctx.reset(new GssTsigContext(*key)));
ASSERT_TRUE(ctx);
ConstTSIGRecordPtr tsig;
uint64_t before = static_cast<uint64_t>(time(0));
EXPECT_NO_THROW(tsig = ctx->sign(0x4321, buf.getData(), buf.getLength()));
uint64_t after = static_cast<uint64_t>(time(0));
ASSERT_TRUE(tsig);
EXPECT_EQ(Name(name), tsig->getName());
EXPECT_EQ(RRClass::ANY(), tsig->getClass());
EXPECT_EQ(0, tsig->getTTL().getValue());
EXPECT_LT(62, tsig->getLength());
const TSIG& rdata = tsig->getRdata();
EXPECT_EQ(Name("gss-tsig."), rdata.getAlgorithm());
EXPECT_LE(before, rdata.getTimeSigned());
EXPECT_GE(after, rdata.getTimeSigned());
EXPECT_EQ(TSIGContext::DEFAULT_FUDGE, rdata.getFudge());
EXPECT_EQ(tsig->getLength() - 62, rdata.getMACSize());
EXPECT_TRUE(rdata.getMAC());
EXPECT_EQ(0x4321, rdata.getOriginalID());
EXPECT_EQ(0, rdata.getError());
EXPECT_EQ(0, rdata.getOtherLen());
EXPECT_FALSE(rdata.getOtherData());
EXPECT_EQ(TSIGContext::SENT_REQUEST, ctx->getState());
EXPECT_EQ(TSIGError::NOERROR(), ctx->getError());
// Depend on setup.
EXPECT_EQ(28, rdata.getMACSize());
}
/// @brief Check that toWire with sign works as expected.
TEST_F(GssTsigContextTest, signToWire) {
GssTsigKeyPtr key;
string name = "1234.sig-foo.example.com.";
ASSERT_NO_THROW(key.reset(new GssTsigKey(name)));
ASSERT_TRUE(key);
setKeytab();
setAdministratorCCache();
// Server.
GssApiName srv_name("DNS/blu.example.nil@EXAMPLE.NIL");
OM_uint32 lifetime = 0;
GssApiCredPtr srv_cred(new GssApiCred(srv_name, GSS_C_ACCEPT, lifetime));
GssApiSecCtx srv_ctx(GSS_C_NO_CONTEXT);
// Client.
GssApiName clnt_name;
GssApiCredPtr cred;
EXPECT_FALSE(key->getSecCtx().get());
OM_uint32 flags = GSS_C_REPLAY_FLAG | GSS_C_MUTUAL_FLAG | GSS_C_INTEG_FLAG;
bool ret = false;
// Exchanges.
GssApiBuffer intoken0;
GssApiBuffer outtoken0;
ASSERT_NO_THROW(ret = key->getSecCtx().init(cred, srv_name, flags,
intoken0, outtoken0,
lifetime));
ASSERT_FALSE(outtoken0.empty());
GssApiBuffer outtoken1;
ASSERT_NO_THROW(ret = srv_ctx.accept(*srv_cred, outtoken0, clnt_name,
outtoken1));
EXPECT_TRUE(ret);
GssApiBuffer outtoken2;
ASSERT_NO_THROW(ret = key->getSecCtx().init(cred, srv_name, flags,
outtoken1, outtoken2,
lifetime));
ASSERT_TRUE(ret);
EXPECT_TRUE(outtoken2.empty());
// Build the message to sign.
message_.clear(Message::RENDER);
message_.setQid(0x1234);
message_.setOpcode(Opcode::QUERY());
message_.setRcode(Rcode::NOERROR());
message_.setHeaderFlag(Message::HEADERFLAG_QR);
Name qname("foo.example.nil.");
message_.addQuestion(Question(qname, RRClass::IN(), RRType::A()));
MessageRenderer renderer;
OutputBuffer obuf(1024);
renderer.setBuffer(&obuf);
// Sign.
GssTsigContextPtr ctx;
ASSERT_NO_THROW(ctx.reset(new GssTsigContext(*key)));
ASSERT_TRUE(ctx);
uint64_t before = static_cast<uint64_t>(time(0));
EXPECT_NO_THROW(message_.toWire(renderer, ctx.get()));
uint64_t after = static_cast<uint64_t>(time(0));
// len is 33 + 62 + 28 = 123.
ASSERT_TRUE(obuf.getData());
EXPECT_EQ(123, obuf.getLength());
// Check the TSIG RR.
message_.clear(Message::PARSE);
InputBuffer ibuf(obuf.getData(), obuf.getLength());
EXPECT_NO_THROW(message_.fromWire(ibuf));
const TSIGRecord* tsig = message_.getTSIGRecord();
ASSERT_TRUE(tsig);
EXPECT_EQ(Name(name), tsig->getName());
EXPECT_EQ(RRClass::ANY(), tsig->getClass());
EXPECT_EQ(0, tsig->getTTL().getValue());
EXPECT_LT(62, tsig->getLength());
const TSIG& rdata = tsig->getRdata();
EXPECT_EQ(Name("gss-tsig."), rdata.getAlgorithm());
EXPECT_LE(before, rdata.getTimeSigned());
EXPECT_GE(after, rdata.getTimeSigned());
EXPECT_EQ(TSIGContext::DEFAULT_FUDGE, rdata.getFudge());
EXPECT_EQ(tsig->getLength() - 62, rdata.getMACSize());
EXPECT_TRUE(rdata.getMAC());
EXPECT_EQ(0x1234, rdata.getOriginalID());
EXPECT_EQ(0, rdata.getError());
EXPECT_EQ(0, rdata.getOtherLen());
EXPECT_FALSE(rdata.getOtherData());
EXPECT_EQ(TSIGContext::SENT_REQUEST, ctx->getState());
EXPECT_EQ(TSIGError::NOERROR(), ctx->getError());
// Depend on setup.
EXPECT_EQ(28, rdata.getMACSize());
}
/// @brief Check that sign and verify work as expected.
TEST_F(GssTsigContextTest, signVerify) {
GssTsigKeyPtr key;
string name = "1234.sig-foo.example.com.";
ASSERT_NO_THROW(key.reset(new GssTsigKey(name)));
ASSERT_TRUE(key);
setKeytab();
setAdministratorCCache();
// Server.
GssTsigKeyPtr srv_key;
ASSERT_NO_THROW(srv_key.reset(new GssTsigKey(name)));
ASSERT_TRUE(srv_key);
EXPECT_FALSE(srv_key->getSecCtx().get());
GssApiName srv_name("DNS/blu.example.nil@EXAMPLE.NIL");
OM_uint32 lifetime = 0;
GssApiCredPtr srv_cred(new GssApiCred(srv_name, GSS_C_ACCEPT, lifetime));
// Client.
GssApiName clnt_name;
GssApiCredPtr cred;
EXPECT_FALSE(key->getSecCtx().get());
OM_uint32 flags = GSS_C_REPLAY_FLAG | GSS_C_MUTUAL_FLAG | GSS_C_INTEG_FLAG;
bool ret = false;
// Exchanges.
GssApiBuffer intoken0;
GssApiBuffer outtoken0;
ASSERT_NO_THROW(ret = key->getSecCtx().init(cred, srv_name, flags,
intoken0, outtoken0,
lifetime));
ASSERT_FALSE(outtoken0.empty());
GssApiBuffer outtoken1;
ASSERT_NO_THROW(ret = srv_key->getSecCtx().accept(*srv_cred, outtoken0,
clnt_name, outtoken1));
EXPECT_TRUE(ret);
GssApiBuffer outtoken2;
ASSERT_NO_THROW(ret = key->getSecCtx().init(cred, srv_name, flags,
outtoken1, outtoken2,
lifetime));
ASSERT_TRUE(ret);
EXPECT_TRUE(outtoken2.empty());
// Build the message to sign.
message_.clear(Message::RENDER);
message_.setQid(0x1234);
message_.setOpcode(Opcode::QUERY());
message_.setRcode(Rcode::NOERROR());
message_.setHeaderFlag(Message::HEADERFLAG_QR);
Name qname("foo.example.nil.");
message_.addQuestion(Question(qname, RRClass::IN(), RRType::A()));
MessageRenderer renderer;
OutputBuffer obuf(1024);
renderer.setBuffer(&obuf);
// Sign.
GssTsigContextPtr ctx;
ASSERT_NO_THROW(ctx.reset(new GssTsigContext(*key)));
ASSERT_TRUE(ctx);
EXPECT_NO_THROW(message_.toWire(renderer, ctx.get()));
// len is 33 + 62 + 28 = 123.
ASSERT_TRUE(obuf.getData());
EXPECT_EQ(123, obuf.getLength());
// Check the TSIG RR.
message_.clear(Message::PARSE);
InputBuffer ibuf(obuf.getData(), obuf.getLength());
EXPECT_NO_THROW(message_.fromWire(ibuf));
const TSIGRecord* tsig = message_.getTSIGRecord();
ASSERT_TRUE(tsig);
// Verify.
ASSERT_NO_THROW(ctx.reset(new GssTsigContext(*srv_key)));
ASSERT_TRUE(ctx);
TSIGError error = TSIGError::NOERROR();
EXPECT_NO_THROW(error = ctx->verify(tsig, obuf.getData(),
obuf.getLength()));
EXPECT_EQ(TSIGError::NOERROR(), error);
EXPECT_TRUE(ctx->lastHadSignature());
EXPECT_EQ(TSIGError::NOERROR(), ctx->getError());
EXPECT_EQ(TSIGContext::RECEIVED_REQUEST, ctx->getState());
// Only once.
ASSERT_NO_THROW(ctx.reset(new GssTsigContext(*srv_key)));
ASSERT_TRUE(ctx);
EXPECT_NO_THROW(error = ctx->verify(tsig, obuf.getData(),
obuf.getLength()));
// Error message is 'The token was a duplicate of an earlier token'.
EXPECT_EQ(TSIGError::BAD_SIG(), error);
EXPECT_EQ(TSIGError::BAD_SIG(), ctx->getError());
EXPECT_EQ(TSIGContext::RECEIVED_REQUEST, ctx->getState());
EXPECT_EQ(GSS_S_DUPLICATE_TOKEN, srv_key->getSecCtx().getLastError());
// Bad key is persistent.
ASSERT_NO_THROW(ctx.reset(new GssTsigContext(*srv_key)));
ASSERT_TRUE(ctx);
ctx->setError(TSIGError::BAD_KEY());
EXPECT_NO_THROW(error = ctx->verify(tsig, obuf.getData(),
obuf.getLength()));
// No message: the error is raised before crypto.
EXPECT_EQ(TSIGError::BAD_KEY(), error);
EXPECT_EQ(TSIGError::BAD_KEY(), ctx->getError());
EXPECT_EQ(TSIGContext::RECEIVED_REQUEST, ctx->getState());
}
/// @brief Check that sign and verify fail on modified signature.
TEST_F(GssTsigContextTest, signBadVerify) {
GssTsigKeyPtr key;
string name = "1234.sig-foo.example.com.";
ASSERT_NO_THROW(key.reset(new GssTsigKey(name)));
ASSERT_TRUE(key);
setKeytab();
setAdministratorCCache();
// Server.
GssTsigKeyPtr srv_key;
ASSERT_NO_THROW(srv_key.reset(new GssTsigKey(name)));
ASSERT_TRUE(srv_key);
EXPECT_FALSE(srv_key->getSecCtx().get());
GssApiName srv_name("DNS/blu.example.nil@EXAMPLE.NIL");
OM_uint32 lifetime = 0;
GssApiCredPtr srv_cred(new GssApiCred(srv_name, GSS_C_ACCEPT, lifetime));
// Client.
GssApiName clnt_name;
GssApiCredPtr cred;
EXPECT_FALSE(key->getSecCtx().get());
OM_uint32 flags = GSS_C_REPLAY_FLAG | GSS_C_MUTUAL_FLAG | GSS_C_INTEG_FLAG;
bool ret = false;
// Exchanges.
GssApiBuffer intoken0;
GssApiBuffer outtoken0;
ASSERT_NO_THROW(ret = key->getSecCtx().init(cred, srv_name, flags,
intoken0, outtoken0,
lifetime));
ASSERT_FALSE(outtoken0.empty());
GssApiBuffer outtoken1;
ASSERT_NO_THROW(ret = srv_key->getSecCtx().accept(*srv_cred, outtoken0,
clnt_name, outtoken1));
EXPECT_TRUE(ret);
GssApiBuffer outtoken2;
ASSERT_NO_THROW(ret = key->getSecCtx().init(cred, srv_name, flags,
outtoken1, outtoken2,
lifetime));
ASSERT_TRUE(ret);
EXPECT_TRUE(outtoken2.empty());
// Build the message to sign.
message_.clear(Message::RENDER);
message_.setQid(0x1234);
message_.setOpcode(Opcode::QUERY());
message_.setRcode(Rcode::NOERROR());
message_.setHeaderFlag(Message::HEADERFLAG_QR);
Name qname("foo.example.nil.");
message_.addQuestion(Question(qname, RRClass::IN(), RRType::A()));
MessageRenderer renderer;
OutputBuffer obuf(1024);
renderer.setBuffer(&obuf);
// Sign.
GssTsigContextPtr ctx;
ASSERT_NO_THROW(ctx.reset(new GssTsigContext(*key)));
ASSERT_TRUE(ctx);
EXPECT_NO_THROW(message_.toWire(renderer, ctx.get()));
// len is 33 + 62 + 28 = 123.
ASSERT_TRUE(obuf.getData());
EXPECT_EQ(123, obuf.getLength());
// Check the TSIG RR.
message_.clear(Message::PARSE);
InputBuffer ibuf(obuf.getData(), obuf.getLength());
// Change the signature at 93..121.
ASSERT_EQ(123, obuf.getLength());
const uint8_t* ptr = obuf.getData();
obuf.writeUint8At(ptr[120] ^ 1, 120);
EXPECT_NO_THROW(message_.fromWire(ibuf));
const TSIGRecord* tsig = message_.getTSIGRecord();
ASSERT_TRUE(tsig);
// Bad verify.
ASSERT_NO_THROW(ctx.reset(new GssTsigContext(*srv_key)));
ASSERT_TRUE(ctx);
TSIGError error = TSIGError::NOERROR();
EXPECT_NO_THROW(error = ctx->verify(tsig, obuf.getData(),
obuf.getLength()));
// Error message is 'A token had an invalid Message Integrity Check (MIC)'.
EXPECT_EQ(TSIGError::BAD_SIG(), error);
EXPECT_EQ(TSIGError::BAD_SIG(), ctx->getError());
EXPECT_EQ(TSIGContext::RECEIVED_REQUEST, ctx->getState());
EXPECT_EQ(GSS_S_BAD_SIG, srv_key->getSecCtx().getLastError());
}
}
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