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// Copyright 2021 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include <stddef.h>
#include <stdint.h>
#include <string>
#include <fuzzer/FuzzedDataProvider.h>
#include "net/cookies/cookie_partition_key.h"
#include "url/origin.h"
namespace net {
extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
FuzzedDataProvider data_provider(data, size);
std::string url_str = data_provider.ConsumeRandomLengthString(800);
GURL url(url_str);
bool has_cross_site_ancestor = data_provider.ConsumeBool();
CookiePartitionKey::AncestorChainBit ancestor_chain_bit =
has_cross_site_ancestor ? CookiePartitionKey::AncestorChainBit::kCrossSite
: CookiePartitionKey::AncestorChainBit::kSameSite;
// Unlike FromURLForTesting and FromUntrustedInput, FromStorage requires the
// top_level_site string passed in be formatted exactly as a SchemefulSite
// would serialize it. Unlike FromURLForTesting, FromUntrustedInput and
// FromStorage require the top_level_site not be opaque.
base::expected<std::optional<CookiePartitionKey>, std::string>
partition_key_from_string_strict =
CookiePartitionKey::FromStorage(url_str, has_cross_site_ancestor);
base::expected<CookiePartitionKey, std::string>
partition_key_from_string_loose = CookiePartitionKey::FromUntrustedInput(
url_str, has_cross_site_ancestor);
CookiePartitionKey partition_key_from_url =
CookiePartitionKey::FromURLForTesting(url, ancestor_chain_bit);
if (partition_key_from_string_strict.has_value() &&
partition_key_from_string_strict.value().has_value()) {
// If we can deserialize from string while being strict the three keys
// should be identical.
CHECK_EQ(**partition_key_from_string_strict, partition_key_from_url);
CHECK_EQ(**partition_key_from_string_strict,
*partition_key_from_string_loose);
// This implies we can re-serialize.
base::expected<CookiePartitionKey::SerializedCookiePartitionKey,
std::string>
serialized_partition_key =
CookiePartitionKey::Serialize(**partition_key_from_string_strict);
CHECK(serialized_partition_key.has_value());
// The serialization should match the initial values.
CHECK_EQ(serialized_partition_key->TopLevelSite(), url_str);
CHECK_EQ(serialized_partition_key->has_cross_site_ancestor(),
has_cross_site_ancestor);
} else if (partition_key_from_string_loose.has_value()) {
// If we can deserialize from string while being loose then two keys
// should be identical.
CHECK_EQ(*partition_key_from_string_loose, partition_key_from_url);
// This implies we can re-serialize.
base::expected<CookiePartitionKey::SerializedCookiePartitionKey,
std::string>
serialized_partition_key =
CookiePartitionKey::Serialize(*partition_key_from_string_loose);
// The serialization should match the initial values.
SchemefulSite schemeful_site(url);
CHECK_EQ(serialized_partition_key->TopLevelSite(),
schemeful_site.GetURL().SchemeIsFile()
? schemeful_site.SerializeFileSiteWithHost()
: schemeful_site.Serialize());
CHECK_EQ(serialized_partition_key->has_cross_site_ancestor(),
has_cross_site_ancestor);
} else {
// If we cannot deserialize from string at all then top_level_site must be
// opaque.
CHECK(partition_key_from_url.site().opaque());
}
return 0;
}
} // namespace net
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