1/* Copyright 2017 The Android Open Source Project 2 * 3 * Redistribution and use in source and binary forms, with or without 4 * modification, are permitted provided that the following conditions 5 * are met: 6 * 1. Redistributions of source code must retain the above copyright 7 * notice, this list of conditions and the following disclaimer. 8 * 2. Redistributions in binary form must reproduce the above copyright 9 * notice, this list of conditions and the following disclaimer in the 10 * documentation and/or other materials provided with the distribution. 11 * 12 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND ANY 13 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 14 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 15 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY 16 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 17 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 18 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 19 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 20 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 21 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ 22 23#include "keystore_backend_binder.h" 24 25#include <binder/IServiceManager.h> 26#include <keystore/keystore.h> 27#include <keystore/IKeystoreService.h> 28#include <keystore/keystore_hidl_support.h> 29 30using namespace android; 31using keystore::blob2hidlVec; 32using keystore::hidl_vec; 33 34namespace { 35const char keystore_service_name[] = "android.security.keystore"; 36}; 37 38int32_t KeystoreBackendBinder::sign( 39 const char *key_id, const uint8_t* in, size_t len, uint8_t** reply, 40 size_t* reply_len) { 41 sp<IServiceManager> sm = defaultServiceManager(); 42 sp<IBinder> binder = sm->getService(String16(keystore_service_name)); 43 sp<IKeystoreService> service = interface_cast<IKeystoreService>(binder); 44 45 if (service == NULL) { 46 ALOGE("could not contact keystore"); 47 return -1; 48 } 49 50 auto inBlob = blob2hidlVec(in ,len); 51 hidl_vec<uint8_t> reply_vec; 52 auto ret = service->sign(String16(key_id), inBlob, &reply_vec); 53 if (!ret.isOk()) { 54 return -1; 55 } 56 57 *reply = reply_vec.releaseData(); 58 *reply_len = reply_vec.size(); 59 return 0; 60} 61 62int32_t KeystoreBackendBinder::get_pubkey( 63 const char *key_id, uint8_t** pubkey, size_t* pubkey_len) { 64 sp<IServiceManager> sm = defaultServiceManager(); 65 sp<IBinder> binder = sm->getService(String16(keystore_service_name)); 66 sp<IKeystoreService> service = interface_cast<IKeystoreService>(binder); 67 68 if (service == NULL) { 69 ALOGE("could not contact keystore"); 70 return -1; 71 } 72 73 hidl_vec<uint8_t> pubkey_vec; 74 auto ret = service->get_pubkey(String16(key_id), &pubkey_vec); 75 if (!ret.isOk()) { 76 return -1; 77 } 78 79 *pubkey = pubkey_vec.releaseData(); 80 *pubkey_len = pubkey_vec.size(); 81 return 0; 82} 83