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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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 "CTLogVerifier.h"
#include "CTTestUtils.h"
#include "nss.h"
#include "gtest/gtest.h"
namespace mozilla { namespace ct {
using namespace pkix;
class CTLogVerifierTest : public ::testing::Test
{
public:
void SetUp() override
{
// Does nothing if NSS is already initialized.
MOZ_RELEASE_ASSERT(NSS_NoDB_Init(nullptr) == SECSuccess);
ASSERT_EQ(Success, mLog.Init(InputForBuffer(GetTestPublicKey())));
ASSERT_EQ(GetTestPublicKeyId(), mLog.keyId());
}
protected:
CTLogVerifier mLog;
};
TEST_F(CTLogVerifierTest, VerifiesCertSCT)
{
LogEntry certEntry;
GetX509CertLogEntry(certEntry);
SignedCertificateTimestamp certSct;
GetX509CertSCT(certSct);
EXPECT_EQ(Success, mLog.Verify(certEntry, certSct));
}
TEST_F(CTLogVerifierTest, VerifiesPrecertSCT)
{
LogEntry precertEntry;
GetPrecertLogEntry(precertEntry);
SignedCertificateTimestamp precertSct;
GetPrecertSCT(precertSct);
EXPECT_EQ(Success, mLog.Verify(precertEntry, precertSct));
}
TEST_F(CTLogVerifierTest, FailsInvalidTimestamp)
{
LogEntry certEntry;
GetX509CertLogEntry(certEntry);
SignedCertificateTimestamp certSct;
GetX509CertSCT(certSct);
// Mangle the timestamp, so that it should fail signature validation.
certSct.timestamp = 0;
EXPECT_EQ(Result::ERROR_BAD_SIGNATURE, mLog.Verify(certEntry, certSct));
}
TEST_F(CTLogVerifierTest, FailsInvalidSignature)
{
LogEntry certEntry;
GetX509CertLogEntry(certEntry);
// Mangle the signature, making VerifyECDSASignedDigestNSS (used by
// CTLogVerifier) return ERROR_BAD_SIGNATURE.
SignedCertificateTimestamp certSct;
GetX509CertSCT(certSct);
certSct.signature.signatureData[20] ^= '\xFF';
EXPECT_EQ(Result::ERROR_BAD_SIGNATURE, mLog.Verify(certEntry, certSct));
// Make VerifyECDSASignedDigestNSS return ERROR_BAD_DER. We still expect
// the verifier to return ERROR_BAD_SIGNATURE.
SignedCertificateTimestamp certSct2;
GetX509CertSCT(certSct2);
certSct2.signature.signatureData[0] ^= '\xFF';
EXPECT_EQ(Result::ERROR_BAD_SIGNATURE, mLog.Verify(certEntry, certSct2));
}
TEST_F(CTLogVerifierTest, FailsInvalidLogID)
{
LogEntry certEntry;
GetX509CertLogEntry(certEntry);
SignedCertificateTimestamp certSct;
GetX509CertSCT(certSct);
// Mangle the log ID, which should cause it to match a different log before
// attempting signature validation.
MOZ_RELEASE_ASSERT(certSct.logId.append('\x0'));
EXPECT_EQ(Result::FATAL_ERROR_INVALID_ARGS, mLog.Verify(certEntry, certSct));
}
TEST_F(CTLogVerifierTest, VerifiesValidSTH)
{
SignedTreeHead sth;
GetSampleSignedTreeHead(sth);
EXPECT_EQ(Success, mLog.VerifySignedTreeHead(sth));
}
TEST_F(CTLogVerifierTest, DoesNotVerifyInvalidSTH)
{
SignedTreeHead sth;
GetSampleSignedTreeHead(sth);
sth.sha256RootHash[0] ^= '\xFF';
EXPECT_EQ(Result::ERROR_BAD_SIGNATURE, mLog.VerifySignedTreeHead(sth));
}
// Test that excess data after the public key is rejected.
TEST_F(CTLogVerifierTest, ExcessDataInPublicKey)
{
Buffer key = GetTestPublicKey();
MOZ_RELEASE_ASSERT(key.append("extra", 5));
CTLogVerifier log;
EXPECT_NE(Success, log.Init(InputForBuffer(key)));
}
} } // namespace mozilla::ct
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