1 /*
2 * Copyright (c) 2023 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 "pin_db_ops.h"
17
18 #include "securec.h"
19
20 #include "adaptor_log.h"
21 #include "adaptor_memory.h"
22 #include "file_operator.h"
23
24 #include "pin_db_ops.h"
25
26 #define DB_VERSION_CURRENT DB_VERSION_1
27
28 typedef struct PinDbOps {
29 void *(*getDb)(uint8_t *data, uint32_t dataLen);
30 void *(*updateDb)(void *preDb);
31 void (*freeDb)(void **pinDb);
32 } PinDbOps;
33
34 PinDbOps g_pinDbOps[] = {
35 {
36 .getDb = GetPinDbV0,
37 .updateDb = NULL,
38 .freeDb = FreePinDbV0,
39 },
40 {
41 .getDb = GetPinDbV1,
42 .updateDb = UpdatePinDbFrom0To1,
43 .freeDb = FreePinDbV1,
44 },
45 };
46
GetVersion(uint8_t * data,uint32_t dataLen,uint32_t * version)47 static ResultCode GetVersion(uint8_t *data, uint32_t dataLen, uint32_t *version)
48 {
49 if (data == NULL || dataLen == 0) {
50 *version = DB_VERSION_CURRENT;
51 LOG_INFO("db file not exist current version:%{public}u.", DB_VERSION_CURRENT);
52 return RESULT_SUCCESS;
53 }
54
55 uint8_t *temp = data;
56 uint32_t tempLen = dataLen;
57 if (GetDataFromBuf(&temp, &tempLen, (uint8_t *)(version), sizeof(uint32_t)) != RESULT_SUCCESS) {
58 LOG_ERROR("read version fail.");
59 return RESULT_GENERAL_ERROR;
60 }
61
62 LOG_INFO("read version:%{public}u, current version:%{public}u.", *version, DB_VERSION_CURRENT);
63 return RESULT_SUCCESS;
64 }
65
LoadAndUpdatePinDb(uint8_t * data,uint32_t dataLen)66 static void *LoadAndUpdatePinDb(uint8_t *data, uint32_t dataLen)
67 {
68 uint32_t version = DB_VERSION_CURRENT;
69 if (GetVersion(data, dataLen, &version) != RESULT_SUCCESS) {
70 LOG_ERROR("get version fail.");
71 return NULL;
72 }
73 if (version > DB_VERSION_CURRENT) {
74 LOG_ERROR("read version invalid.");
75 return NULL;
76 }
77 void *pinDb = g_pinDbOps[version].getDb(data, dataLen);
78 if (pinDb == NULL) {
79 LOG_ERROR("get db fail.");
80 return NULL;
81 }
82 if (version == DB_VERSION_CURRENT) {
83 return pinDb;
84 }
85 while (version < DB_VERSION_CURRENT) {
86 void *pinDbPre = pinDb;
87 pinDb = g_pinDbOps[version + 1].updateDb(pinDbPre);
88 g_pinDbOps[version].freeDb(&pinDbPre);
89 if (pinDb == NULL) {
90 LOG_ERROR("update db fail.");
91 return NULL;
92 }
93 version++;
94 }
95 if (WritePinDb(pinDb) != RESULT_SUCCESS) {
96 LOG_ERROR("WritePinDb fail.");
97 g_pinDbOps[version].freeDb(&pinDb);
98 return NULL;
99 }
100
101 return pinDb;
102 }
103
ReadPinDbData(uint8_t ** data,uint32_t * dataLen)104 static ResultCode ReadPinDbData(uint8_t **data, uint32_t *dataLen)
105 {
106 FileOperator *fileOp = GetFileOperator(DEFAULT_FILE_OPERATOR);
107 if (!IsFileOperatorValid(fileOp)) {
108 LOG_ERROR("fileOp invalid.");
109 return RESULT_GENERAL_ERROR;
110 }
111
112 if (!fileOp->isFileExist(PIN_INDEX_NAME)) {
113 LOG_INFO("pin file not found.");
114 *data = NULL;
115 *dataLen = 0;
116 return RESULT_SUCCESS;
117 }
118
119 ResultCode ret = (ResultCode)(fileOp->getFileLen(PIN_INDEX_NAME, dataLen));
120 if (ret != RESULT_SUCCESS) {
121 LOG_ERROR("getFileLen failed");
122 return RESULT_BAD_READ;
123 }
124
125 *data = Malloc(*dataLen);
126 if ((*data) == NULL) {
127 LOG_ERROR("malloc data failed");
128 return RESULT_GENERAL_ERROR;
129 }
130 ret = (ResultCode)fileOp->readFile(PIN_INDEX_NAME, *data, *dataLen);
131 if (ret != RESULT_SUCCESS) {
132 LOG_ERROR("readFile failed.");
133 (void)memset_s(*data, *dataLen, 0, *dataLen);
134 Free(*data);
135 *data = NULL;
136 *dataLen = 0;
137 return RESULT_BAD_READ;
138 }
139 return RESULT_SUCCESS;
140 }
141
ReadPinDb(void)142 PinDbV1 *ReadPinDb(void)
143 {
144 uint8_t *data = NULL;
145 uint32_t dataLen = 0;
146 ResultCode ret = ReadPinDbData(&data, &dataLen);
147 if (ret != RESULT_SUCCESS) {
148 LOG_ERROR("ReadPinDbData fail.");
149 return NULL;
150 }
151 PinDbV1 *pinDb = LoadAndUpdatePinDb(data, dataLen);
152 if (data != NULL) {
153 (void)memset_s(data, dataLen, 0, dataLen);
154 Free(data);
155 }
156 if (pinDb == NULL) {
157 LOG_ERROR("LoadAndUpdatePinDb fail.");
158 }
159
160 return pinDb;
161 }
162
WritePinDb(PinDbV1 * pinDbV1)163 ResultCode WritePinDb(PinDbV1 *pinDbV1)
164 {
165 return WritePinDbV1((void *)pinDbV1);
166 }
167
FreePinDb(PinDbV1 ** pinDbV1)168 void FreePinDb(PinDbV1 **pinDbV1)
169 {
170 FreePinDbV1((void **)(pinDbV1));
171 }
172