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/* 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 "pkixgtest.h"
#include "mozpkix/pkixc.h"
#include "mozpkix/pkixder.h"
#include "mozpkix/pkixnss.h"
#include "secerr.h"
#include "sslerr.h"
using namespace mozilla::pkix;
using namespace mozilla::pkix::test;
static ByteString CreateCert(
const char* issuerCN, const char* subjectCN, EndEntityOrCA endEntityOrCA,
/*optional*/ const ByteString* subjectAlternativeNameExtension = nullptr,
/*optional*/ const ByteString* extendedKeyUsageExtension = nullptr) {
EXPECT_TRUE(issuerCN);
EXPECT_TRUE(subjectCN);
static long serialNumberValue = 0;
++serialNumberValue;
ByteString serialNumber(CreateEncodedSerialNumber(serialNumberValue));
EXPECT_FALSE(ENCODING_FAILED(serialNumber));
ByteString issuerDER(CNToDERName(issuerCN));
ByteString subjectDER(CNToDERName(subjectCN));
std::time_t notBefore = 1620000000;
std::time_t notAfter = 1630000000;
std::vector<ByteString> extensions;
if (endEntityOrCA == EndEntityOrCA::MustBeCA) {
ByteString basicConstraints =
CreateEncodedBasicConstraints(true, nullptr, Critical::Yes);
EXPECT_FALSE(ENCODING_FAILED(basicConstraints));
extensions.push_back(basicConstraints);
}
if (subjectAlternativeNameExtension) {
extensions.push_back(*subjectAlternativeNameExtension);
}
if (extendedKeyUsageExtension) {
extensions.push_back(*extendedKeyUsageExtension);
}
extensions.push_back(ByteString()); // marks the end of the list
ScopedTestKeyPair reusedKey(CloneReusedKeyPair());
ByteString certDER(CreateEncodedCertificate(
v3, sha256WithRSAEncryption(), serialNumber, issuerDER, notBefore,
notAfter, subjectDER, *reusedKey, extensions.data(), *reusedKey,
sha256WithRSAEncryption()));
EXPECT_FALSE(ENCODING_FAILED(certDER));
return certDER;
}
class pkixc_tests : public ::testing::Test {};
TEST_F(pkixc_tests, Valid_VerifyCodeSigningCertificateChain) {
ByteString root(CreateCert("CA", "CA", EndEntityOrCA::MustBeCA));
ByteString intermediate(
CreateCert("CA", "intermediate", EndEntityOrCA::MustBeCA));
ByteString subjectAltNameExtension =
CreateEncodedSubjectAltName(DNSName("example.com"));
ByteString endEntity(CreateCert("intermediate", "end-entity",
EndEntityOrCA::MustBeEndEntity,
&subjectAltNameExtension));
const uint8_t* certificates[] = {endEntity.data(), intermediate.data(),
root.data()};
const uint16_t certificateLengths[] = {
static_cast<uint16_t>(endEntity.length()),
static_cast<uint16_t>(intermediate.length()),
static_cast<uint16_t>(root.length())};
const size_t numCertificates = 3;
const uint64_t secondsSinceEpoch = 1625000000;
uint8_t rootSHA256Digest[32] = {0};
Input rootInput;
Result rv = rootInput.Init(root.data(), root.length());
ASSERT_EQ(rv, Success);
rv = DigestBufNSS(rootInput, DigestAlgorithm::sha256, rootSHA256Digest,
sizeof(rootSHA256Digest));
ASSERT_EQ(rv, Success);
const uint8_t hostname[] = {"example.com"};
size_t hostnameLength = strlen("example.com");
PRErrorCode error = 0;
ASSERT_TRUE(VerifyCodeSigningCertificateChain(
&certificates[0], &certificateLengths[0], numCertificates,
secondsSinceEpoch, &rootSHA256Digest[0], &hostname[0], hostnameLength,
&error));
// If the extended key usage extension is present, it must have the code
// signing usage.
ByteString extendedKeyUsageExtension(
CreateEKUExtension(BytesToByteString(tlv_id_kp_codeSigning)));
ByteString endEntityWithEKU(
CreateCert("intermediate", "end-entity", EndEntityOrCA::MustBeEndEntity,
&subjectAltNameExtension, &extendedKeyUsageExtension));
const uint8_t* certificatesWithEKU[] = {endEntityWithEKU.data(),
intermediate.data(), root.data()};
const uint16_t certificateLengthsWithEKU[] = {
static_cast<uint16_t>(endEntityWithEKU.length()),
static_cast<uint16_t>(intermediate.length()),
static_cast<uint16_t>(root.length())};
ASSERT_TRUE(VerifyCodeSigningCertificateChain(
&certificatesWithEKU[0], &certificateLengthsWithEKU[0], numCertificates,
secondsSinceEpoch, &rootSHA256Digest[0], &hostname[0], hostnameLength,
&error));
}
TEST_F(pkixc_tests, Invalid_VerifyCodeSigningCertificateChain) {
ByteString root(CreateCert("CA", "CA", EndEntityOrCA::MustBeCA));
ByteString subjectAltNameExtension =
CreateEncodedSubjectAltName(DNSName("example.com"));
ByteString endEntity(CreateCert("CA", "end-entity",
EndEntityOrCA::MustBeEndEntity,
&subjectAltNameExtension));
const uint8_t* certificates[] = {endEntity.data(), root.data()};
const uint16_t certificateLengths[] = {
static_cast<uint16_t>(endEntity.length()),
static_cast<uint16_t>(root.length())};
const size_t numCertificates = 2;
const uint64_t secondsSinceEpoch = 1625000000;
uint8_t rootSHA256Digest[32] = {0};
Input rootInput;
Result rv = rootInput.Init(root.data(), root.length());
ASSERT_EQ(rv, Success);
rv = DigestBufNSS(rootInput, DigestAlgorithm::sha256, rootSHA256Digest,
sizeof(rootSHA256Digest));
ASSERT_EQ(rv, Success);
const uint8_t hostname[] = {"example.com"};
size_t hostnameLength = strlen("example.com");
PRErrorCode error = 0;
// Consistency check first to ensure these tests are meaningful.
ASSERT_TRUE(VerifyCodeSigningCertificateChain(
&certificates[0], &certificateLengths[0], numCertificates,
secondsSinceEpoch, &rootSHA256Digest[0], &hostname[0], hostnameLength,
&error));
ASSERT_EQ(error, 0);
// Test with "now" after the certificates have expired.
ASSERT_FALSE(VerifyCodeSigningCertificateChain(
&certificates[0], &certificateLengths[0], numCertificates,
secondsSinceEpoch + 10000000, &rootSHA256Digest[0], &hostname[0],
hostnameLength, &error));
ASSERT_EQ(error, SEC_ERROR_EXPIRED_ISSUER_CERTIFICATE);
// Test with a different root digest.
uint8_t wrongRootSHA256Digest[32] = {1};
ASSERT_FALSE(VerifyCodeSigningCertificateChain(
&certificates[0], &certificateLengths[0], numCertificates,
secondsSinceEpoch, &wrongRootSHA256Digest[0], &hostname[0],
hostnameLength, &error));
ASSERT_EQ(error, SEC_ERROR_UNKNOWN_ISSUER);
// Test with a different host name.
const uint8_t wrongHostname[] = "example.org";
size_t wrongHostnameLength = strlen("example.org");
ASSERT_FALSE(VerifyCodeSigningCertificateChain(
&certificates[0], &certificateLengths[0], numCertificates,
secondsSinceEpoch, &rootSHA256Digest[0], &wrongHostname[0],
wrongHostnameLength, &error));
ASSERT_EQ(error, SSL_ERROR_BAD_CERT_DOMAIN);
// Test with a certificate with an extended key usage that doesn't include
// code signing.
ByteString extendedKeyUsageExtension(
CreateEKUExtension(BytesToByteString(tlv_id_kp_clientAuth)));
ByteString endEntityWithEKU(
CreateCert("CA", "end-entity", EndEntityOrCA::MustBeEndEntity,
&subjectAltNameExtension, &extendedKeyUsageExtension));
const uint8_t* certificatesWithEKU[] = {endEntityWithEKU.data(), root.data()};
const uint16_t certificateLengthsWithEKU[] = {
static_cast<uint16_t>(endEntityWithEKU.length()),
static_cast<uint16_t>(root.length())};
ASSERT_FALSE(VerifyCodeSigningCertificateChain(
&certificatesWithEKU[0], &certificateLengthsWithEKU[0], numCertificates,
secondsSinceEpoch, &rootSHA256Digest[0], &hostname[0], hostnameLength,
&error));
ASSERT_EQ(error, SEC_ERROR_INADEQUATE_CERT_TYPE);
}
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