1 /*
2 * Copyright (c) 2021-2022 Huawei Device Co., Ltd.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15
16 #include "hks_request.h"
17
18 #include <securec.h>
19 #include "iservice_registry.h"
20
21 #include "hks_log.h"
22 #include "hks_param.h"
23 #include "hks_template.h"
24
25 using namespace OHOS;
26
27 namespace {
28 constexpr int SA_ID_KEYSTORE_SERVICE = 3510;
29 const std::u16string SA_KEYSTORE_SERVICE_DESCRIPTOR = u"ohos.security.hks.service";
30 }
31
GetHksProxy()32 static sptr<IRemoteObject> GetHksProxy()
33 {
34 auto registry = SystemAbilityManagerClient::GetInstance().GetSystemAbilityManager();
35 HKS_IF_NULL_LOGE_RETURN(registry, nullptr, "GetHksProxy registry is null")
36
37 sptr<IRemoteObject> hksProxy = registry->GetSystemAbility(SA_ID_KEYSTORE_SERVICE);
38 HKS_IF_NULL_LOGE_RETURN(hksProxy, nullptr,
39 "GetHksProxy GetSystemAbility %" LOG_PUBLIC "d is null", SA_ID_KEYSTORE_SERVICE)
40
41 return hksProxy;
42 }
43
HksReadRequestReply(MessageParcel & reply,struct HksBlob * outBlob)44 static int32_t HksReadRequestReply(MessageParcel &reply, struct HksBlob *outBlob)
45 {
46 int32_t ret = reply.ReadInt32();
47 HKS_IF_NOT_SUCC_RETURN(ret, ret)
48
49 uint32_t outLen = reply.ReadUint32();
50 if (outLen == 0) {
51 if (outBlob != nullptr) {
52 outBlob->size = 0;
53 }
54 return ret;
55 }
56
57 HKS_IF_NOT_SUCC_RETURN(CheckBlob(outBlob), HKS_ERROR_INVALID_ARGUMENT)
58
59 const uint8_t *outData = reply.ReadBuffer(outLen);
60 HKS_IF_NULL_RETURN(outData, HKS_ERROR_IPC_MSG_FAIL)
61
62 if (outBlob->size < outLen) {
63 HKS_LOG_E("outBlob size[%" LOG_PUBLIC "u] smaller than outLen[%" LOG_PUBLIC "u]", outBlob->size, outLen);
64 return HKS_ERROR_BUFFER_TOO_SMALL;
65 }
66
67 (void)memcpy_s(outBlob->data, outBlob->size, outData, outLen);
68 outBlob->size = outLen;
69 return HKS_SUCCESS;
70 }
71
HksSendRequest(enum HksMessage type,const struct HksBlob * inBlob,struct HksBlob * outBlob,const struct HksParamSet * paramSet)72 int32_t HksSendRequest(enum HksMessage type, const struct HksBlob *inBlob,
73 struct HksBlob *outBlob, const struct HksParamSet *paramSet)
74 {
75 enum HksSendType sendType = HKS_SEND_TYPE_SYNC;
76 struct HksParam *sendTypeParam = nullptr;
77 int32_t ret = HksGetParam(paramSet, HKS_TAG_IS_ASYNCHRONIZED, &sendTypeParam);
78 if (ret == HKS_SUCCESS) {
79 sendType = static_cast<enum HksSendType>(sendTypeParam->uint32Param);
80 }
81
82 MessageParcel data;
83 MessageParcel reply;
84 MessageOption option;
85 if (sendType == HKS_SEND_TYPE_SYNC) {
86 option = MessageOption::TF_SYNC;
87 } else {
88 option = MessageOption::TF_ASYNC;
89 }
90
91 data.WriteInterfaceToken(SA_KEYSTORE_SERVICE_DESCRIPTOR);
92
93 if (outBlob == nullptr) {
94 data.WriteUint32(0);
95 } else {
96 data.WriteUint32(outBlob->size);
97 }
98
99 data.WriteUint32(inBlob->size);
100 data.WriteBuffer(inBlob->data, static_cast<size_t>(inBlob->size));
101
102 sptr<IRemoteObject> hksProxy = GetHksProxy();
103 HKS_IF_NULL_LOGE_RETURN(hksProxy, HKS_ERROR_BAD_STATE, "GetHksProxy registry is null")
104
105 int error = hksProxy->SendRequest(type, data, reply, option);
106 if (error != 0) {
107 return error;
108 }
109
110 return HksReadRequestReply(reply, outBlob);
111 }
112