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// Copyright 2016 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/usb/usb_blocklist.h"
#include <algorithm>
#include <string>
#include <string_view>
#include <tuple>
#include "base/metrics/field_trial_params.h"
#include "base/strings/string_number_conversions.h"
#include "base/strings/string_split.h"
#include "services/device/public/cpp/device_features.h"
#include "services/device/public/mojom/usb_device.mojom.h"
namespace {
static base::LazyInstance<UsbBlocklist>::Leaky g_singleton =
LAZY_INSTANCE_INITIALIZER;
constexpr uint16_t kMaxVersion = 0xffff;
// Returns true if the passed string is exactly 4 digits long and only contains
// valid hexadecimal characters (no leading 0x).
bool IsHexComponent(std::string_view string) {
if (string.length() != 4)
return false;
// This is necessary because base::HexStringToUInt allows whitespace and the
// "0x" prefix in its input.
for (char c : string) {
if (c >= '0' && c <= '9')
continue;
if (c >= 'a' && c <= 'f')
continue;
if (c >= 'A' && c <= 'F')
continue;
return false;
}
return true;
}
bool CompareEntry(const UsbBlocklist::Entry& a, const UsbBlocklist::Entry& b) {
return std::tie(a.vendor_id, a.product_id, a.max_version) <
std::tie(b.vendor_id, b.product_id, b.max_version);
}
// Returns true if an entry in (begin, end] matches the vendor and product IDs
// of |entry| and has a device version greater than or equal to |entry|.
template <class Iterator>
bool EntryMatches(Iterator begin,
Iterator end,
const UsbBlocklist::Entry& entry) {
auto it = std::lower_bound(begin, end, entry, CompareEntry);
return it != end && it->vendor_id == entry.vendor_id &&
it->product_id == entry.product_id;
}
// This list must be sorted according to CompareEntry.
constexpr UsbBlocklist::Entry kStaticEntries[] = {
{0x096e, 0x0850, kMaxVersion}, // KEY-ID
{0x096e, 0x0852, kMaxVersion}, // Feitian
{0x096e, 0x0853, kMaxVersion}, // Feitian
{0x096e, 0x0854, kMaxVersion}, // Feitian
{0x096e, 0x0856, kMaxVersion}, // Feitian
{0x096e, 0x0858, kMaxVersion}, // Feitian USB+NFC
{0x096e, 0x085a, kMaxVersion}, // Feitian
{0x096e, 0x085b, kMaxVersion}, // Feitian
{0x096e, 0x0880, kMaxVersion}, // HyperFIDO
{0x09c3, 0x0023, kMaxVersion}, // HID Global BlueTrust Token
// Yubikey devices. https://crbug.com/818807
{0x1050, 0x0010, kMaxVersion},
{0x1050, 0x0018, kMaxVersion},
{0x1050, 0x0030, kMaxVersion},
{0x1050, 0x0110, kMaxVersion},
{0x1050, 0x0111, kMaxVersion},
{0x1050, 0x0112, kMaxVersion},
{0x1050, 0x0113, kMaxVersion},
{0x1050, 0x0114, kMaxVersion},
{0x1050, 0x0115, kMaxVersion},
{0x1050, 0x0116, kMaxVersion},
{0x1050, 0x0120, kMaxVersion},
{0x1050, 0x0200, kMaxVersion},
{0x1050, 0x0211, kMaxVersion},
{0x1050, 0x0401, kMaxVersion},
{0x1050, 0x0402, kMaxVersion},
{0x1050, 0x0403, kMaxVersion},
{0x1050, 0x0404, kMaxVersion},
{0x1050, 0x0405, kMaxVersion},
{0x1050, 0x0406, kMaxVersion},
{0x1050, 0x0407, kMaxVersion},
{0x1050, 0x0410, kMaxVersion},
{0x10c4, 0x8acf, kMaxVersion}, // U2F Zero
{0x18d1, 0x5026, kMaxVersion}, // Titan
{0x1a44, 0x00bb, kMaxVersion}, // VASCO
{0x1d50, 0x60fc, kMaxVersion}, // OnlyKey
{0x1e0d, 0xf1ae, kMaxVersion}, // Keydo AES
{0x1e0d, 0xf1d0, kMaxVersion}, // Neowave Keydo
{0x1ea8, 0xf025, kMaxVersion}, // Thetis
{0x20a0, 0x4287, kMaxVersion}, // Nitrokey
{0x24dc, 0x0101, kMaxVersion}, // JaCarta
{0x2581, 0xf1d0, kMaxVersion}, // Happlink
{0x2abe, 0x1002, kMaxVersion}, // Bluink
{0x2ccf, 0x0880, kMaxVersion}, // Feitian USB, HyperFIDO
};
} // namespace
UsbBlocklist::~UsbBlocklist() = default;
// static
UsbBlocklist& UsbBlocklist::Get() {
return g_singleton.Get();
}
bool UsbBlocklist::IsExcluded(const Entry& entry) const {
return EntryMatches(std::begin(kStaticEntries), std::end(kStaticEntries),
entry) ||
EntryMatches(dynamic_entries_.begin(), dynamic_entries_.end(), entry);
}
bool UsbBlocklist::IsExcluded(
const device::mojom::UsbDeviceInfo& device_info) const {
uint16_t device_version = device_info.device_version_major << 8 |
device_info.device_version_minor << 4 |
device_info.device_version_subminor;
return IsExcluded(
Entry{device_info.vendor_id, device_info.product_id, device_version});
}
void UsbBlocklist::ResetToDefaultValuesForTest() {
dynamic_entries_.clear();
PopulateWithServerProvidedValues();
}
UsbBlocklist::UsbBlocklist() {
DCHECK(std::is_sorted(std::begin(kStaticEntries), std::end(kStaticEntries),
CompareEntry));
PopulateWithServerProvidedValues();
}
void UsbBlocklist::PopulateWithServerProvidedValues() {
std::string blocklist_string = base::GetFieldTrialParamByFeatureAsString(
/*feature=*/features::kWebUsbBlocklist,
/*param_name=*/"blocklist_additions",
/*default_value=*/"");
for (const auto& entry :
base::SplitStringPiece(blocklist_string, ",", base::TRIM_WHITESPACE,
base::SPLIT_WANT_NONEMPTY)) {
std::vector<std::string_view> components = base::SplitStringPiece(
entry, ":", base::KEEP_WHITESPACE, base::SPLIT_WANT_ALL);
if (components.size() != 3 || !IsHexComponent(components[0]) ||
!IsHexComponent(components[1]) || !IsHexComponent(components[2])) {
continue;
}
uint32_t vendor_id;
uint32_t product_id;
uint32_t max_version;
if (!base::HexStringToUInt(components[0], &vendor_id) ||
!base::HexStringToUInt(components[1], &product_id) ||
!base::HexStringToUInt(components[2], &max_version)) {
continue;
}
dynamic_entries_.emplace_back(vendor_id, product_id, max_version);
}
std::sort(dynamic_entries_.begin(), dynamic_entries_.end(), CompareEntry);
}
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