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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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 "MultiLogCTVerifier.h"
#include <stdint.h>
#include "CTLogVerifier.h"
#include "CTObjectsExtractor.h"
#include "CTSerialization.h"
#include "CTTestUtils.h"
#include "gtest/gtest.h"
#include "mozilla/EnumSet.h"
#include "mozilla/Move.h"
#include "nss.h"
namespace mozilla { namespace ct {
using namespace mozilla::pkix;
class MultiLogCTVerifierTest : public ::testing::Test
{
public:
MultiLogCTVerifierTest()
: mNow(Time::uninitialized)
{}
void SetUp() override
{
// Does nothing if NSS is already initialized.
MOZ_RELEASE_ASSERT(NSS_NoDB_Init(nullptr) == SECSuccess);
ASSERT_EQ(Success, mVerifier.AddLog(InputForBuffer(GetTestPublicKey())));
mTestCert = GetDEREncodedX509Cert();
mEmbeddedCert = GetDEREncodedTestEmbeddedCert();
mCaCert = GetDEREncodedCACert();
mCaCertSPKI = ExtractCertSPKI(mCaCert);
mIntermediateCert = GetDEREncodedIntermediateCert();
mIntermediateCertSPKI = ExtractCertSPKI(mIntermediateCert);
// Set the current time making sure all test timestamps are in the past.
mNow = TimeFromEpochInSeconds(1451606400u); // Date.parse("2016-01-01")/1000
}
void CheckForSingleVerifiedSCTInResult(const CTVerifyResult& result,
SignedCertificateTimestamp::Origin origin)
{
EXPECT_EQ(0U, result.decodingErrors);
ASSERT_EQ(1U, result.scts.length());
EXPECT_EQ(SignedCertificateTimestamp::VerificationStatus::OK,
result.scts[0].verificationStatus);
EXPECT_EQ(origin, result.scts[0].origin);
}
// Writes an SCTList containing a single |sct| into |output|.
void EncodeSCTListForTesting(Input sct, Buffer& output)
{
Vector<Input> list;
ASSERT_TRUE(list.append(Move(sct)));
ASSERT_EQ(Success, EncodeSCTList(list, output));
}
void GetSCTListWithInvalidLogID(Buffer& result)
{
result.clear();
Buffer sct(GetTestSignedCertificateTimestamp());
// Change a byte inside the Log ID part of the SCT so it does
// not match the log used in the tests.
sct[15] ^= '\xFF';
EncodeSCTListForTesting(InputForBuffer(sct), result);
}
void CheckPrecertVerification(const Buffer& cert, const Buffer& issuerSPKI)
{
Buffer sctList;
ExtractEmbeddedSCTList(cert, sctList);
ASSERT_FALSE(sctList.empty());
CTVerifyResult result;
ASSERT_EQ(Success,
mVerifier.Verify(InputForBuffer(cert), InputForBuffer(issuerSPKI),
InputForBuffer(sctList), Input(), Input(),
mNow, result));
CheckForSingleVerifiedSCTInResult(result,
SignedCertificateTimestamp::Origin::Embedded);
}
protected:
MultiLogCTVerifier mVerifier;
Buffer mTestCert;
Buffer mEmbeddedCert;
Buffer mCaCert;
Buffer mCaCertSPKI;
Buffer mIntermediateCert;
Buffer mIntermediateCertSPKI;
Time mNow;
};
// Test that an embedded SCT can be extracted and the extracted SCT contains
// the expected data. This tests the ExtractEmbeddedSCTList function from
// CTTestUtils.h that other tests here rely upon.
TEST_F(MultiLogCTVerifierTest, ExtractEmbeddedSCT)
{
SignedCertificateTimestamp sct;
// Extract the embedded SCT.
Buffer sctList;
ExtractEmbeddedSCTList(mEmbeddedCert, sctList);
ASSERT_FALSE(sctList.empty());
Reader sctReader;
ASSERT_EQ(Success, DecodeSCTList(InputForBuffer(sctList), sctReader));
Input sctItemInput;
ASSERT_EQ(Success, ReadSCTListItem(sctReader, sctItemInput));
EXPECT_TRUE(sctReader.AtEnd()); // we only expect one sct in the list
Reader sctItemReader(sctItemInput);
ASSERT_EQ(Success, DecodeSignedCertificateTimestamp(sctItemReader, sct));
// Make sure the SCT contains the expected data.
EXPECT_EQ(SignedCertificateTimestamp::Version::V1, sct.version);
EXPECT_EQ(GetTestPublicKeyId(), sct.logId);
uint64_t expectedTimestamp = 1365181456275;
EXPECT_EQ(expectedTimestamp, sct.timestamp);
}
TEST_F(MultiLogCTVerifierTest, VerifiesEmbeddedSCT)
{
CheckPrecertVerification(mEmbeddedCert, mCaCertSPKI);
}
TEST_F(MultiLogCTVerifierTest, VerifiesEmbeddedSCTWithPreCA)
{
CheckPrecertVerification(GetDEREncodedTestEmbeddedWithPreCACert(),
mCaCertSPKI);
}
TEST_F(MultiLogCTVerifierTest, VerifiesEmbeddedSCTWithIntermediate)
{
CheckPrecertVerification(GetDEREncodedTestEmbeddedWithIntermediateCert(),
mIntermediateCertSPKI);
}
TEST_F(MultiLogCTVerifierTest, VerifiesEmbeddedSCTWithIntermediateAndPreCA)
{
CheckPrecertVerification(GetDEREncodedTestEmbeddedWithIntermediatePreCACert(),
mIntermediateCertSPKI);
}
TEST_F(MultiLogCTVerifierTest, VerifiesSCTFromOCSP)
{
Buffer sct(GetTestSignedCertificateTimestamp());
Buffer sctList;
EncodeSCTListForTesting(InputForBuffer(sct), sctList);
CTVerifyResult result;
ASSERT_EQ(Success,
mVerifier.Verify(InputForBuffer(mTestCert), Input(),
Input(), InputForBuffer(sctList), Input(),
mNow, result));
CheckForSingleVerifiedSCTInResult(result,
SignedCertificateTimestamp::Origin::OCSPResponse);
}
TEST_F(MultiLogCTVerifierTest, VerifiesSCTFromTLS)
{
Buffer sct(GetTestSignedCertificateTimestamp());
Buffer sctList;
EncodeSCTListForTesting(InputForBuffer(sct), sctList);
CTVerifyResult result;
ASSERT_EQ(Success,
mVerifier.Verify(InputForBuffer(mTestCert), Input(),
Input(), Input(), InputForBuffer(sctList),
mNow, result));
CheckForSingleVerifiedSCTInResult(result,
SignedCertificateTimestamp::Origin::TLSExtension);
}
TEST_F(MultiLogCTVerifierTest, VerifiesSCTFromMultipleSources)
{
Buffer sct(GetTestSignedCertificateTimestamp());
Buffer sctList;
EncodeSCTListForTesting(InputForBuffer(sct), sctList);
CTVerifyResult result;
ASSERT_EQ(Success,
mVerifier.Verify(InputForBuffer(mTestCert), Input(), Input(),
InputForBuffer(sctList), InputForBuffer(sctList),
mNow, result));
// The result should contain verified SCTs from TLS and OCSP origins.
EnumSet<SignedCertificateTimestamp::Origin> origins;
for (const SignedCertificateTimestamp& sct : result.scts) {
EXPECT_EQ(SignedCertificateTimestamp::VerificationStatus::OK,
sct.verificationStatus);
origins += sct.origin;
}
EXPECT_FALSE(
origins.contains(SignedCertificateTimestamp::Origin::Embedded));
EXPECT_TRUE(
origins.contains(SignedCertificateTimestamp::Origin::OCSPResponse));
EXPECT_TRUE(
origins.contains(SignedCertificateTimestamp::Origin::TLSExtension));
}
TEST_F(MultiLogCTVerifierTest, IdentifiesSCTFromUnknownLog)
{
Buffer sctList;
GetSCTListWithInvalidLogID(sctList);
CTVerifyResult result;
ASSERT_EQ(Success,
mVerifier.Verify(InputForBuffer(mTestCert), Input(),
Input(), Input(), InputForBuffer(sctList),
mNow, result));
EXPECT_EQ(0U, result.decodingErrors);
ASSERT_EQ(1U, result.scts.length());
EXPECT_EQ(SignedCertificateTimestamp::VerificationStatus::UnknownLog,
result.scts[0].verificationStatus);
}
} } // namespace mozilla::ct
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