79 lines
2.4 KiB
C++
79 lines
2.4 KiB
C++
//
|
|
// Copyright (C) 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 "tpm_ffi.h"
|
|
|
|
#include <android-base/logging.h>
|
|
|
|
#include "host/commands/secure_env/tpm_hmac.h"
|
|
#include "host/commands/secure_env/tpm_resource_manager.h"
|
|
|
|
using cuttlefish::TpmResourceManager;
|
|
|
|
extern "C" {
|
|
|
|
uint32_t tpm_hmac(void* trm, const uint8_t* data, uint32_t data_len,
|
|
uint8_t* tag, uint32_t tag_len) {
|
|
if (trm == nullptr) {
|
|
LOG(ERROR) << "No TPM resource manager provided";
|
|
return 1;
|
|
}
|
|
TpmResourceManager* resource_manager =
|
|
reinterpret_cast<TpmResourceManager*>(trm);
|
|
auto hmac =
|
|
TpmHmacWithContext(*resource_manager, "TpmHmac_context", data, data_len);
|
|
if (!hmac) {
|
|
LOG(ERROR) << "Could not calculate HMAC";
|
|
return 1;
|
|
} else if (hmac->size != tag_len) {
|
|
LOG(ERROR) << "HMAC size of " << hmac->size
|
|
<< " different than expected tag len " << tag_len;
|
|
return 1;
|
|
}
|
|
memcpy(tag, hmac->buffer, tag_len);
|
|
return 0;
|
|
}
|
|
|
|
void secure_env_log(const char* file, unsigned int line, int severity,
|
|
const char* tag, const char* msg) {
|
|
android::base::LogSeverity severity_enum;
|
|
switch (severity) {
|
|
case 0:
|
|
severity_enum = android::base::LogSeverity::VERBOSE;
|
|
break;
|
|
case 1:
|
|
severity_enum = android::base::LogSeverity::DEBUG;
|
|
break;
|
|
case 2:
|
|
severity_enum = android::base::LogSeverity::INFO;
|
|
break;
|
|
case 3:
|
|
severity_enum = android::base::LogSeverity::WARNING;
|
|
break;
|
|
default:
|
|
case 4:
|
|
severity_enum = android::base::LogSeverity::ERROR;
|
|
break;
|
|
case 5:
|
|
severity_enum = android::base::LogSeverity::FATAL_WITHOUT_ABORT;
|
|
break;
|
|
case 6:
|
|
severity_enum = android::base::LogSeverity::FATAL;
|
|
break;
|
|
}
|
|
android::base::LogMessage::LogLine(file, line, severity_enum, tag, msg);
|
|
}
|
|
}
|