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/*
*
* Copyright 2020, The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "include/KeyMintAidlUtils.h"
namespace aidl {
namespace android {
namespace hardware {
namespace keymint {
using namespace ::keymaster;
vector<uint8_t> authToken2AidlVec(const HardwareAuthToken& token) {
static_assert(1 /* version size */ + sizeof(token.challenge) + sizeof(token.userId) +
sizeof(token.authenticatorId) + sizeof(token.authenticatorType) +
sizeof(token.timestamp) + 32 /* HMAC size */
== sizeof(hw_auth_token_t),
"HardwareAuthToken content size does not match hw_auth_token_t size");
vector<uint8_t> result;
if (token.mac.size() <= 32) return result;
result.resize(sizeof(hw_auth_token_t));
auto pos = result.begin();
*pos++ = 0; // Version byte
pos = copy_bytes_to_iterator(token.challenge, pos);
pos = copy_bytes_to_iterator(token.userId, pos);
pos = copy_bytes_to_iterator(token.authenticatorId, pos);
pos = copy_bytes_to_iterator(token.authenticatorType, pos);
pos = copy_bytes_to_iterator(token.timestamp, pos);
pos = std::copy(token.mac.data(), token.mac.data() + token.mac.size(), pos);
return result;
}
// TODO(seleneh): This needs to be modified depends on how aidl support for union came out to
// be.
vector<KeyParameter> kmParamSet2Aidl(const keymaster_key_param_set_t& set) {
vector<KeyParameter> result;
if (set.length == 0 || set.params == nullptr) return result;
result.resize(set.length);
keymaster_key_param_t* params = set.params;
for (size_t i = 0; i < set.length; ++i) {
auto tag = params[i].tag;
result[i].tag = legacy_enum_conversion(tag);
switch (typeFromTag(tag)) {
case KM_ENUM:
case KM_ENUM_REP:
result[i].integer = params[i].enumerated;
break;
case KM_UINT:
case KM_UINT_REP:
result[i].integer = params[i].integer;
break;
case KM_ULONG:
case KM_ULONG_REP:
result[i].longInteger = params[i].long_integer;
break;
case KM_DATE:
result[i].longInteger = params[i].date_time;
break;
case KM_BOOL:
result[i].boolValue = params[i].boolean;
break;
case KM_BIGNUM:
case KM_BYTES:
result[i].blob.assign(params[i].blob.data,
params[i].blob.data + params[i].blob.data_length);
break;
case KM_INVALID:
default:
params[i].tag = KM_TAG_INVALID;
/* just skip */
break;
}
}
return result;
}
// TODO(seleneh): This needs to be modified depends on how aidl support for union came out to
// be.
keymaster_key_param_set_t aidlKeyParams2Km(const vector<KeyParameter>& keyParams) {
keymaster_key_param_set_t set;
set.params = new keymaster_key_param_t[keyParams.size()];
set.length = keyParams.size();
for (size_t i = 0; i < keyParams.size(); ++i) {
auto tag = legacy_enum_conversion(keyParams[i].tag);
switch (typeFromTag(tag)) {
case KM_ENUM:
case KM_ENUM_REP:
set.params[i] = keymaster_param_enum(tag, keyParams[i].integer);
break;
case KM_UINT:
case KM_UINT_REP:
set.params[i] = keymaster_param_int(tag, keyParams[i].integer);
break;
case KM_ULONG:
case KM_ULONG_REP:
set.params[i] = keymaster_param_long(tag, keyParams[i].longInteger);
break;
case KM_DATE:
set.params[i] = keymaster_param_date(tag, keyParams[i].longInteger);
break;
case KM_BOOL:
if (keyParams[i].boolValue)
set.params[i] = keymaster_param_bool(tag);
else
set.params[i].tag = KM_TAG_INVALID;
break;
case KM_BIGNUM:
case KM_BYTES:
set.params[i] =
keymaster_param_blob(tag, keyParams[i].blob.data(), keyParams[i].blob.size());
break;
case KM_INVALID:
default:
set.params[i].tag = KM_TAG_INVALID;
/* just skip */
break;
}
}
return set;
}
} // namespace keymint
} // namespace hardware
} // namespace android
} // namespace aidl
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