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