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// Copyright (c) 2015 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "net/cert/cert_verify_proc_whitelist.h"
#include "base/memory/ref_counted.h"
#include "net/base/test_data_directory.h"
#include "net/cert/x509_certificate.h"
#include "net/test/cert_test_util.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace net {
namespace {
HashValue GetTestHashValue(uint8_t label, HashValueTag tag) {
HashValue hash_value(tag);
memset(hash_value.data(), label, hash_value.size());
return hash_value;
}
HashValueVector GetFakeHashValues() {
HashValueVector public_key_hashes;
// Fake "root" hash
public_key_hashes.push_back(GetTestHashValue(0x00, HASH_VALUE_SHA256));
public_key_hashes.push_back(GetTestHashValue(0x01, HASH_VALUE_SHA1));
// Fake "intermediate" hash
public_key_hashes.push_back(GetTestHashValue(0x02, HASH_VALUE_SHA256));
public_key_hashes.push_back(GetTestHashValue(0x03, HASH_VALUE_SHA1));
// Fake "leaf" hash
public_key_hashes.push_back(GetTestHashValue(0x04, HASH_VALUE_SHA256));
public_key_hashes.push_back(GetTestHashValue(0x05, HASH_VALUE_SHA1));
return public_key_hashes;
}
// The SHA-256 hash of the leaf cert "ok_cert.pem"; obtainable either
// via X509Certificate::CalculateFingerprint256 or
// openssl x509 -inform pem -in ok_cert.pem -outform der | openssl
// dgst -sha256 -c
const uint8_t kWhitelistCerts[][crypto::kSHA256Length] = {
/* clang-format off */
{ 0xf4, 0x42, 0xdd, 0x66, 0xfa, 0x10, 0x70, 0x65,
0xd1, 0x7e, 0xd9, 0xbb, 0x7c, 0xa9, 0x3c, 0x79,
0x63, 0xbe, 0x01, 0xa7, 0x54, 0x18, 0xab, 0x2f,
0xc3, 0x9a, 0x14, 0x53, 0xc3, 0x83, 0xa0, 0x5a },
/* clang-format on */
};
TEST(CertVerifyProcWhitelistTest, AcceptsWhitelistedEEByRoot) {
scoped_refptr<X509Certificate> cert =
ImportCertFromFile(GetTestCertsDirectory(), "ok_cert.pem");
ASSERT_TRUE(cert);
// clang-format off
const PublicKeyWhitelist kWhitelist[] = {
{ { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
kWhitelistCerts, arraysize(kWhitelistCerts)
},
};
// clang-format on
SetCertificateWhitelistForTesting(kWhitelist, arraysize(kWhitelist));
HashValueVector public_key_hashes = GetFakeHashValues();
// Should return false, indicating this cert is acceptable because of
// it being whitelisted.
EXPECT_FALSE(IsNonWhitelistedCertificate(*cert, public_key_hashes));
SetCertificateWhitelistForTesting(nullptr, 0);
}
TEST(CertVerifyProcWhitelistTest, AcceptsWhitelistedEEByIntermediate) {
scoped_refptr<X509Certificate> cert =
ImportCertFromFile(GetTestCertsDirectory(), "ok_cert.pem");
ASSERT_TRUE(cert);
// clang-format off
const PublicKeyWhitelist kWhitelist[] = {
{ { 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02,
0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02,
0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02,
0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02 },
kWhitelistCerts, arraysize(kWhitelistCerts)
},
};
// clang-format on
SetCertificateWhitelistForTesting(kWhitelist, arraysize(kWhitelist));
HashValueVector public_key_hashes = GetFakeHashValues();
// Should return false, indicating this cert is acceptable because of
// it being whitelisted.
EXPECT_FALSE(IsNonWhitelistedCertificate(*cert, public_key_hashes));
SetCertificateWhitelistForTesting(nullptr, 0);
}
TEST(CertVerifyProcWhitelistTest, RejectsNonWhitelistedEE) {
scoped_refptr<X509Certificate> cert =
ImportCertFromFile(GetTestCertsDirectory(), "expired_cert.pem");
ASSERT_TRUE(cert);
// clang-format off
const PublicKeyWhitelist kWhitelist[] = {
{ { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
kWhitelistCerts, arraysize(kWhitelistCerts)
},
};
// clang-format on
SetCertificateWhitelistForTesting(kWhitelist, arraysize(kWhitelist));
HashValueVector public_key_hashes = GetFakeHashValues();
// Should return true, indicating this certificate chains to a constrained
// root and is not whitelisted.
EXPECT_TRUE(IsNonWhitelistedCertificate(*cert, public_key_hashes));
SetCertificateWhitelistForTesting(nullptr, 0);
}
TEST(CertVerifyProcWhitelistTest, RejectsNonWhitelistedEEByIntermediate) {
scoped_refptr<X509Certificate> cert =
ImportCertFromFile(GetTestCertsDirectory(), "expired_cert.pem");
ASSERT_TRUE(cert);
// clang-format off
const PublicKeyWhitelist kWhitelist[] = {
{ { 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02,
0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02,
0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02,
0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02 },
kWhitelistCerts, arraysize(kWhitelistCerts)
},
};
// clang-format on
SetCertificateWhitelistForTesting(kWhitelist, arraysize(kWhitelist));
HashValueVector public_key_hashes = GetFakeHashValues();
// Should return true, indicating this certificate chains to a constrained
// root and is not whitelisted.
EXPECT_TRUE(IsNonWhitelistedCertificate(*cert, public_key_hashes));
SetCertificateWhitelistForTesting(nullptr, 0);
}
TEST(CertVerifyProcWhitelistTest, AcceptsUnconstrainedLeaf) {
scoped_refptr<X509Certificate> cert =
ImportCertFromFile(GetTestCertsDirectory(), "ok_cert.pem");
ASSERT_TRUE(cert);
// clang-format off
const PublicKeyWhitelist kWhitelist[] = {
{ { 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10,
0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10,
0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10,
0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10 },
kWhitelistCerts, arraysize(kWhitelistCerts)
},
};
// clang-format on
SetCertificateWhitelistForTesting(kWhitelist, arraysize(kWhitelist));
HashValueVector public_key_hashes = GetFakeHashValues();
// Should return false, because the chain (as indicated by
// public_key_hashes) is not constrained.
EXPECT_FALSE(IsNonWhitelistedCertificate(*cert, public_key_hashes));
SetCertificateWhitelistForTesting(nullptr, 0);
}
} // namespace
} // namespace net
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