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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 "components/payments/content/web_app_manifest_section_table.h"
#include <stdint.h>
#include <time.h>
#include <memory>
#include "base/check_op.h"
#include "base/notreached.h"
#include "base/time/time.h"
#include "components/webdata/common/web_database.h"
#include "sql/statement.h"
#include "sql/transaction.h"
namespace payments {
namespace {
// Data valid duration in seconds.
const time_t WEB_APP_MANIFEST_VALID_TIME_IN_SECONDS = 90 * 24 * 60 * 60;
// Note that the fingerprint is calculated with SHA-256.
const size_t kFingerPrintLength = 32;
WebDatabaseTable::TypeKey GetWebAppManifestKey() {
// We just need a unique constant. Use the address of a static that
// COMDAT folding won't touch in an optimizing linker.
static int table_key = 0;
return reinterpret_cast<void*>(&table_key);
}
// Converts 2-dimensional vector |fingerprints| to 1-dimesional vector.
std::unique_ptr<std::vector<uint8_t>> SerializeFingerPrints(
const std::vector<std::vector<uint8_t>>& fingerprints) {
auto serialized_fingerprints = std::make_unique<std::vector<uint8_t>>();
for (const auto& fingerprint : fingerprints) {
DCHECK_EQ(fingerprint.size(), kFingerPrintLength);
serialized_fingerprints->insert(serialized_fingerprints->end(),
fingerprint.begin(), fingerprint.end());
}
return serialized_fingerprints;
}
// Converts 1-dimensional vector created by SerializeFingerPrints back to
// 2-dimensional vector. Each vector of the second dimensional vector has exact
// kFingerPrintLength number of elements.
bool DeserializeFingerPrints(
const std::vector<uint8_t>& fingerprints,
std::vector<std::vector<uint8_t>>& deserialized_fingerprints) {
if (fingerprints.size() % kFingerPrintLength != 0)
return false;
for (size_t i = 0; i < fingerprints.size(); i += kFingerPrintLength) {
deserialized_fingerprints.emplace_back(
fingerprints.begin() + i,
fingerprints.begin() + i + kFingerPrintLength);
}
return true;
}
} // namespace
WebAppManifestSectionTable::WebAppManifestSectionTable() = default;
WebAppManifestSectionTable::~WebAppManifestSectionTable() = default;
WebAppManifestSectionTable* WebAppManifestSectionTable::FromWebDatabase(
WebDatabase* db) {
return static_cast<WebAppManifestSectionTable*>(
db->GetTable(GetWebAppManifestKey()));
}
WebDatabaseTable::TypeKey WebAppManifestSectionTable::GetTypeKey() const {
return GetWebAppManifestKey();
}
bool WebAppManifestSectionTable::CreateTablesIfNecessary() {
if (!db()->Execute("CREATE TABLE IF NOT EXISTS web_app_manifest_section ( "
"expire_date INTEGER NOT NULL DEFAULT 0, "
"id VARCHAR, "
"min_version INTEGER NOT NULL DEFAULT 0, "
"fingerprints BLOB) ")) {
NOTREACHED();
}
return true;
}
bool WebAppManifestSectionTable::MigrateToVersion(
int version,
bool* update_compatible_version) {
return true;
}
void WebAppManifestSectionTable::RemoveExpiredData() {
const base::Time now = base::Time::NowFromSystemTime();
sql::Statement s(db()->GetUniqueStatement(
"DELETE FROM web_app_manifest_section WHERE expire_date < ? "));
s.BindTime(0, now);
s.Run();
}
bool WebAppManifestSectionTable::AddWebAppManifest(
const std::vector<WebAppManifestSection>& manifest) {
DCHECK_LT(0U, manifest.size());
sql::Transaction transaction(db());
if (!transaction.Begin())
return false;
sql::Statement s1(db()->GetUniqueStatement(
"DELETE FROM web_app_manifest_section WHERE id=? "));
for (const auto& section : manifest) {
s1.BindString(0, section.id);
if (!s1.Run())
return false;
s1.Reset(true);
}
sql::Statement s2(
db()->GetUniqueStatement("INSERT INTO web_app_manifest_section "
"(expire_date, id, min_version, fingerprints) "
"VALUES (?, ?, ?, ?)"));
const base::Time expire_date =
base::Time::FromTimeT(base::Time::NowFromSystemTime().ToTimeT() +
WEB_APP_MANIFEST_VALID_TIME_IN_SECONDS);
for (const auto& section : manifest) {
int index = 0;
s2.BindTime(index++, expire_date);
s2.BindString(index++, section.id);
s2.BindInt64(index++, section.min_version);
std::unique_ptr<std::vector<uint8_t>> serialized_fingerprints =
SerializeFingerPrints(section.fingerprints);
s2.BindBlob(index, *serialized_fingerprints);
if (!s2.Run())
return false;
s2.Reset(true);
}
if (!transaction.Commit())
return false;
return true;
}
std::vector<WebAppManifestSection>
WebAppManifestSectionTable::GetWebAppManifest(const std::string& web_app) {
sql::Statement s(
db()->GetUniqueStatement("SELECT id, min_version, fingerprints "
"FROM web_app_manifest_section "
"WHERE id=?"));
s.BindString(0, web_app);
std::vector<WebAppManifestSection> manifest;
while (s.Step()) {
WebAppManifestSection section;
int index = 0;
section.id = s.ColumnString(index++);
section.min_version = s.ColumnInt64(index++);
std::vector<uint8_t> fingerprints;
if (!s.ColumnBlobAsVector(index, &fingerprints)) {
manifest.clear();
break;
}
if (!DeserializeFingerPrints(fingerprints, section.fingerprints)) {
manifest.clear();
break;
}
manifest.emplace_back(std::move(section));
}
return manifest;
}
} // namespace payments
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