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47 lines
1.3 KiB
C++
47 lines
1.3 KiB
C++
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// Copyright 2017 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "net/cert/known_roots.h"
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#include <string.h>
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#include <algorithm>
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#include "net/base/hash_value.h"
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#include "net/cert/root_cert_list_generated.h"
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namespace net {
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namespace {
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// Comparator-predicate that serves as a < function for comparing a
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// RootCertData to a HashValue
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struct HashValueToRootCertDataComp {
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bool operator()(const HashValue& hash, const RootCertData& root_cert) {
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DCHECK_EQ(HASH_VALUE_SHA256, hash.tag);
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return memcmp(hash.data(), root_cert.sha256_spki_hash, 32) < 0;
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}
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bool operator()(const RootCertData& root_cert, const HashValue& hash) {
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DCHECK_EQ(HASH_VALUE_SHA256, hash.tag);
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return memcmp(root_cert.sha256_spki_hash, hash.data(), 32) < 0;
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}
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};
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} // namespace
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int32_t GetNetTrustAnchorHistogramIdForSPKI(const HashValue& spki_hash) {
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if (spki_hash.tag != HASH_VALUE_SHA256)
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return 0;
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auto* it = std::lower_bound(std::begin(kRootCerts), std::end(kRootCerts),
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spki_hash, HashValueToRootCertDataComp());
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return (it != std::end(kRootCerts) &&
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!HashValueToRootCertDataComp()(spki_hash, *it))
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? it->histogram_id
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: 0;
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}
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} // namespace net
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