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/* Copyright 2017 The Android Open Source Project
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */
#include "keystore_backend_binder.h"
#include <android/security/IKeystoreService.h>
#include <binder/IServiceManager.h>
#include <keystore/keystore.h>
#include <keystore/keystore_hidl_support.h>
using android::security::IKeystoreService;
using namespace android;
using keystore::blob2hidlVec;
using keystore::hidl_vec;
namespace {
const char keystore_service_name[] = "android.security.keystore";
};
int32_t KeystoreBackendBinder::sign(const char* key_id, const uint8_t* in, size_t len,
uint8_t** reply, size_t* reply_len) {
sp<IServiceManager> sm = defaultServiceManager();
sp<IBinder> binder = sm->getService(String16(keystore_service_name));
sp<IKeystoreService> service = interface_cast<IKeystoreService>(binder);
if (service == NULL) {
ALOGE("could not contact keystore");
return -1;
}
auto inBlob = blob2hidlVec(in, len);
std::vector<uint8_t> reply_vec;
auto ret = service->sign(String16(key_id), inBlob, &reply_vec);
if (!ret.isOk()) {
return -1;
}
hidl_vec<uint8_t> reply_hidl(reply_vec); // makes copy
*reply = reply_hidl.releaseData();
*reply_len = reply_vec.size();
return 0;
}
int32_t KeystoreBackendBinder::get_pubkey(const char* key_id, uint8_t** pubkey,
size_t* pubkey_len) {
sp<IServiceManager> sm = defaultServiceManager();
sp<IBinder> binder = sm->getService(String16(keystore_service_name));
sp<IKeystoreService> service = interface_cast<IKeystoreService>(binder);
if (service == NULL) {
ALOGE("could not contact keystore");
return -1;
}
std::vector<uint8_t> pubkey_vec;
auto ret = service->get_pubkey(String16(key_id), &pubkey_vec);
if (!ret.isOk()) {
return -1;
}
hidl_vec<uint8_t> hidl_pubkey(pubkey_vec); // makes copy
*pubkey = hidl_pubkey.releaseData(); // caller should clean up memory.
*pubkey_len = pubkey_vec.size();
return 0;
}
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