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130 lines
4.6 KiB
130 lines
4.6 KiB
/*
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**
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** Copyright 2016, The Android Open Source Project
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**
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** Licensed under the Apache License, Version 2.0 (the "License");
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** you may not use this file except in compliance with the License.
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** You may obtain a copy of the License at
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**
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** http://www.apache.org/licenses/LICENSE-2.0
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**
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** Unless required by applicable law or agreed to in writing, software
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** distributed under the License is distributed on an "AS IS" BASIS,
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** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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** See the License for the specific language governing permissions and
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** limitations under the License.
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*/
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#pragma once
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#include "keymaster_tags.h"
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#include <android/hardware/keymaster/3.0/IKeymasterDevice.h>
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#include <hidl/Status.h>
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#include <ostream>
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#include <sstream>
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#include <string>
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#include <android-base/logging.h>
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namespace keymaster::ng {
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inline static std::ostream& formatArgs(std::ostream& out) {
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return out;
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}
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template <typename First, typename... Args>
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inline static std::ostream& formatArgs(std::ostream& out, First&& first, Args&&... args) {
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out << first;
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return formatArgs(out, args...);
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}
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template <typename... Args> inline static std::string argsToString(Args&&... args) {
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std::stringstream s;
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formatArgs(s, args...);
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return s.str();
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}
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template <typename... Msgs>
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inline static ErrorCode ksHandleHidlError(const Return<ErrorCode>& error, Msgs&&... msgs) {
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if (!error.isOk()) {
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LOG(ERROR) << "HIDL call failed with " << error.description() << " @ "
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<< argsToString(msgs...);
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return ErrorCode::UNKNOWN_ERROR;
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}
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return ErrorCode(error);
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}
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template <typename... Msgs>
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inline static ErrorCode ksHandleHidlError(const Return<void>& error, Msgs&&... msgs) {
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if (!error.isOk()) {
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LOG(ERROR) << "HIDL call failed with " << error.description() << " @ "
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<< argsToString(msgs...);
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return ErrorCode::UNKNOWN_ERROR;
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}
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return ErrorCode::OK;
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}
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#define KS_HANDLE_HIDL_ERROR(rc) \
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::keystore::ksHandleHidlError(rc, __FILE__, ":", __LINE__, ":", __PRETTY_FUNCTION__)
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inline static hidl_vec<uint8_t> blob2hidlVec(const uint8_t* data, const size_t length,
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bool inPlace = true) {
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hidl_vec<uint8_t> result;
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if (inPlace)
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result.setToExternal(const_cast<unsigned char*>(data), length);
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else {
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result.resize(length);
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memcpy(&result[0], data, length);
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}
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return result;
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}
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inline static hidl_vec<uint8_t> blob2hidlVec(const std::string& value) {
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hidl_vec<uint8_t> result;
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result.setToExternal(
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reinterpret_cast<uint8_t*>(const_cast<std::string::value_type*>(value.data())),
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static_cast<size_t>(value.size()));
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return result;
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}
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inline static hidl_vec<uint8_t> blob2hidlVec(const std::vector<uint8_t>& blob) {
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hidl_vec<uint8_t> result;
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result.setToExternal(const_cast<uint8_t*>(blob.data()), static_cast<size_t>(blob.size()));
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return result;
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}
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template <typename T, typename OutIter>
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inline static OutIter copy_bytes_to_iterator(const T& value, OutIter dest) {
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const uint8_t* value_ptr = reinterpret_cast<const uint8_t*>(&value);
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return std::copy(value_ptr, value_ptr + sizeof(value), dest);
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}
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inline static hidl_vec<uint8_t> authToken2HidlVec(const HardwareAuthToken& token) {
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static_assert(
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std::is_same<decltype(token.hmac), ::android::hardware::hidl_array<uint8_t, 32>>::value,
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"This function assumes token HMAC is 32 bytes, but it might not be.");
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static_assert(1 /* version size */ + sizeof(token.challenge) + sizeof(token.userId) +
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sizeof(token.authenticatorId) + sizeof(token.authenticatorType) +
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sizeof(token.timestamp) + 32 /* HMAC size */
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== sizeof(hw_auth_token_t),
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"HardwareAuthToken content size does not match hw_auth_token_t size");
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hidl_vec<uint8_t> result;
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result.resize(sizeof(hw_auth_token_t));
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auto pos = result.begin();
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*pos++ = 0; // Version byte
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pos = copy_bytes_to_iterator(token.challenge, pos);
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pos = copy_bytes_to_iterator(token.userId, pos);
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pos = copy_bytes_to_iterator(token.authenticatorId, pos);
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pos = copy_bytes_to_iterator(token.authenticatorType, pos);
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pos = copy_bytes_to_iterator(token.timestamp, pos);
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pos = std::copy(token.hmac.data(), token.hmac.data() + token.hmac.size(), pos);
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return result;
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}
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inline std::string hidlVec2String(const hidl_vec<uint8_t>& value) {
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return std::string(reinterpret_cast<const std::string::value_type*>(&value[0]), value.size());
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}
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} // namespace keymaster::ng
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