148 lines
4.9 KiB
C++
148 lines
4.9 KiB
C++
/*
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*
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* Copyright 2020, 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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#include "include/KeyMintAidlUtils.h"
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namespace aidl {
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namespace android {
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namespace hardware {
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namespace keymint {
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using namespace ::keymaster;
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vector<uint8_t> authToken2AidlVec(const HardwareAuthToken& token) {
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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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vector<uint8_t> result;
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if (token.mac.size() <= 32) return 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.mac.data(), token.mac.data() + token.mac.size(), pos);
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return result;
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}
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// TODO(seleneh): This needs to be modified depends on how aidl support for union came out to
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// be.
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vector<KeyParameter> kmParamSet2Aidl(const keymaster_key_param_set_t& set) {
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vector<KeyParameter> result;
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if (set.length == 0 || set.params == nullptr) return result;
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result.resize(set.length);
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keymaster_key_param_t* params = set.params;
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for (size_t i = 0; i < set.length; ++i) {
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auto tag = params[i].tag;
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result[i].tag = legacy_enum_conversion(tag);
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switch (typeFromTag(tag)) {
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case KM_ENUM:
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case KM_ENUM_REP:
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result[i].integer = params[i].enumerated;
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break;
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case KM_UINT:
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case KM_UINT_REP:
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result[i].integer = params[i].integer;
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break;
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case KM_ULONG:
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case KM_ULONG_REP:
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result[i].longInteger = params[i].long_integer;
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break;
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case KM_DATE:
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result[i].longInteger = params[i].date_time;
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break;
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case KM_BOOL:
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result[i].boolValue = params[i].boolean;
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break;
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case KM_BIGNUM:
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case KM_BYTES:
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result[i].blob.assign(params[i].blob.data,
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params[i].blob.data + params[i].blob.data_length);
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break;
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case KM_INVALID:
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default:
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params[i].tag = KM_TAG_INVALID;
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/* just skip */
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break;
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}
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}
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return result;
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}
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// TODO(seleneh): This needs to be modified depends on how aidl support for union came out to
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// be.
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keymaster_key_param_set_t aidlKeyParams2Km(const vector<KeyParameter>& keyParams) {
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keymaster_key_param_set_t set;
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set.params = new (std::nothrow) keymaster_key_param_t[keyParams.size()];
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set.length = keyParams.size();
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for (size_t i = 0; i < keyParams.size(); ++i) {
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auto tag = legacy_enum_conversion(keyParams[i].tag);
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switch (typeFromTag(tag)) {
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case KM_ENUM:
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case KM_ENUM_REP:
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set.params[i] = keymaster_param_enum(tag, keyParams[i].integer);
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break;
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case KM_UINT:
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case KM_UINT_REP:
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set.params[i] = keymaster_param_int(tag, keyParams[i].integer);
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break;
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case KM_ULONG:
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case KM_ULONG_REP:
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set.params[i] = keymaster_param_long(tag, keyParams[i].longInteger);
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break;
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case KM_DATE:
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set.params[i] = keymaster_param_date(tag, keyParams[i].longInteger);
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break;
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case KM_BOOL:
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if (keyParams[i].boolValue)
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set.params[i] = keymaster_param_bool(tag);
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else
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set.params[i].tag = KM_TAG_INVALID;
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break;
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case KM_BIGNUM:
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case KM_BYTES:
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set.params[i] =
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keymaster_param_blob(tag, keyParams[i].blob.data(), keyParams[i].blob.size());
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break;
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case KM_INVALID:
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default:
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set.params[i].tag = KM_TAG_INVALID;
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/* just skip */
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break;
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}
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}
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return set;
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}
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} // namespace keymint
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} // namespace hardware
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} // namespace android
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} // namespace aidl
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