1 /*
2 * Copyright (C) 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 #include "medialibrary_common_utils.h"
16
17 #include <algorithm>
18 #include <regex>
19 #include <unordered_set>
20 #include "medialibrary_errno.h"
21 #include "medialibrary_db_const.h"
22 #include "medialibrary_tracer.h"
23 #include "media_log.h"
24 #include "openssl/sha.h"
25 #include "vision_column.h"
26
27 namespace OHOS {
28 namespace Media {
29 using namespace std;
30 const vector<string> CHAR2HEX_TABLE = {
31 "00", "01", "02", "03", "04", "05", "06", "07", "08", "09", "0A", "0B", "0C", "0D", "0E", "0F",
32 "10", "11", "12", "13", "14", "15", "16", "17", "18", "19", "1A", "1B", "1C", "1D", "1E", "1F",
33 "20", "21", "22", "23", "24", "25", "26", "27", "28", "29", "2A", "2B", "2C", "2D", "2E", "2F",
34 "30", "31", "32", "33", "34", "35", "36", "37", "38", "39", "3A", "3B", "3C", "3D", "3E", "3F",
35
36 "40", "41", "42", "43", "44", "45", "46", "47", "48", "49", "4A", "4B", "4C", "4D", "4E", "4F",
37 "50", "51", "52", "53", "54", "55", "56", "57", "58", "59", "5A", "5B", "5C", "5D", "5E", "5F",
38 "60", "61", "62", "63", "64", "65", "66", "67", "68", "69", "6A", "6B", "6C", "6D", "6E", "6F",
39 "70", "71", "72", "73", "74", "75", "76", "77", "78", "79", "7A", "7B", "7C", "7D", "7E", "7F",
40
41 "80", "81", "82", "83", "84", "85", "86", "87", "88", "89", "8A", "8B", "8C", "8D", "8E", "8F",
42 "90", "91", "92", "93", "94", "95", "96", "97", "98", "99", "9A", "9B", "9C", "9D", "9E", "9F",
43 "A0", "A1", "A2", "A3", "A4", "A5", "A6", "A7", "A8", "A9", "AA", "AB", "AC", "AD", "AE", "AF",
44 "B0", "B1", "B2", "B3", "B4", "B5", "B6", "B7", "B8", "B9", "BA", "BB", "BC", "BD", "BE", "BF",
45
46 "C0", "C1", "C2", "C3", "C4", "C5", "C6", "C7", "C8", "C9", "CA", "CB", "CC", "CD", "CE", "CF",
47 "D0", "D1", "D2", "D3", "D4", "D5", "D6", "D7", "D8", "D9", "DA", "DB", "DC", "DD", "DE", "DF",
48 "E0", "E1", "E2", "E3", "E4", "E5", "E6", "E7", "E8", "E9", "EA", "EB", "EC", "ED", "EE", "EF",
49 "F0", "F1", "F2", "F3", "F4", "F5", "F6", "F7", "F8", "F9", "FA", "FB", "FC", "FD", "FE", "FF"
50 };
51
Char2Hex(const unsigned char * data,const size_t len,std::string & hexStr)52 void MediaLibraryCommonUtils::Char2Hex(const unsigned char *data, const size_t len, std::string &hexStr)
53 {
54 constexpr int CHAR_WIDTH = 8;
55 constexpr int HEX_WIDTH = 4;
56 constexpr size_t OUT_HEXSTR_SIZE = SHA256_DIGEST_LENGTH * (CHAR_WIDTH / HEX_WIDTH);
57 hexStr = "";
58 hexStr.reserve(OUT_HEXSTR_SIZE);
59 for (size_t i = 0; i < len; i++) {
60 hexStr.append(CHAR2HEX_TABLE[data[i]]);
61 }
62 }
63
GenKey(const unsigned char * data,const size_t len,std::string & key)64 int32_t MediaLibraryCommonUtils::GenKey(const unsigned char *data, const size_t len, std::string &key)
65 {
66 if (len == 0 || len > LONG_MAX) {
67 return -EINVAL;
68 }
69
70 unsigned char hash[SHA256_DIGEST_LENGTH] = "";
71 SHA256_CTX ctx;
72 SHA256_Init(&ctx);
73 SHA256_Update(&ctx, data, len);
74 SHA256_Final(hash, &ctx);
75
76 /* here we translate sha256 hash to hexadecimal. each 8-bit char will be presented by two characters([0-9a-f]) */
77 Char2Hex(hash, SHA256_DIGEST_LENGTH, key);
78 return E_OK;
79 }
80
GenKeySHA256(const std::vector<uint8_t> & input,std::string & key)81 int32_t MediaLibraryCommonUtils::GenKeySHA256(const std::vector<uint8_t> &input, std::string &key)
82 {
83 return GenKey(input.data(), input.size(), key);
84 }
85
GenKeySHA256(const std::string & input,std::string & key)86 int32_t MediaLibraryCommonUtils::GenKeySHA256(const std::string &input, std::string &key)
87 {
88 return GenKey((const unsigned char *)input.c_str(), input.size(), key);
89 }
90
ExtractKeyWord(std::string & str)91 void MediaLibraryCommonUtils::ExtractKeyWord(std::string &str)
92 {
93 if (str.empty()) {
94 return;
95 }
96 // add seprate space symbol,like file_id=?
97 std::regex spacePattern("\\=|\\<>|\\>|\\>=|\\<|\\<=|\\!=",
98 std::regex_constants::ECMAScript | std::regex_constants::icase);
99 str = regex_replace(str, spacePattern, " ");
100 // remove front space of key word
101 auto pos = str.find_first_not_of(" ");
102 if (pos != std::string::npos) {
103 str.erase(0, pos);
104 }
105 // remove back space of key word
106 pos = str.find_first_of(" ");
107 if (pos != std::string::npos) {
108 str = str.substr(0, pos);
109 }
110 }
111
112 static const std::unordered_set<std::string> FILE_KEY_WHITE_LIST {
113 // Files table columns
114 MEDIA_DATA_DB_ID,
115 MEDIA_DATA_DB_RELATIVE_PATH,
116 MEDIA_DATA_DB_NAME,
117 MEDIA_DATA_DB_PARENT_ID,
118 MEDIA_DATA_DB_MIME_TYPE,
119 MEDIA_DATA_DB_MEDIA_TYPE,
120 MEDIA_DATA_DB_SIZE,
121 MEDIA_DATA_DB_DATE_ADDED,
122 MEDIA_DATA_DB_DATE_ADDED_S,
123 MEDIA_DATA_DB_DATE_MODIFIED,
124 MEDIA_DATA_DB_DATE_MODIFIED_S,
125 MEDIA_DATA_DB_DATE_TAKEN,
126 MEDIA_DATA_DB_TITLE,
127 MEDIA_DATA_DB_ARTIST,
128 MEDIA_DATA_DB_AUDIO_ALBUM,
129 MEDIA_DATA_DB_DURATION,
130 MEDIA_DATA_DB_WIDTH,
131 MEDIA_DATA_DB_HEIGHT,
132 MEDIA_DATA_DB_ORIENTATION,
133 MEDIA_DATA_DB_BUCKET_ID,
134 MEDIA_DATA_DB_BUCKET_NAME,
135 DIRECTORY_DB_DIRECTORY_TYPE,
136 MEDIA_DATA_DB_DATE_TRASHED,
137 MEDIA_DATA_DB_DATE_TRASHED_S,
138 MEDIA_DATA_DB_BUCKET_ID,
139 MEDIA_DATA_DB_ALBUM_ID,
140 DEVICE_DB_NETWORK_ID,
141 SMARTABLUMASSETS_PARENTID,
142 SMARTALBUM_DB_ID,
143 MEDIA_DATA_DB_FILE_PATH,
144 MEDIA_DATA_DB_IS_TRASH,
145 MEDIA_DATA_DB_RECYCLE_PATH,
146 MEDIA_DATA_DB_OWNER_PACKAGE,
147 MediaColumn::MEDIA_PACKAGE_NAME,
148 MEDIA_DATA_DB_IS_FAV,
149 MEDIA_DATA_DB_TIME_PENDING,
150 MEDIA_DATA_DB_POSITION,
151 PhotoColumn::PHOTO_THUMB_STATUS,
152
153 // Photos table columns
154 COMPAT_HIDDEN,
155 COMPAT_PHOTO_SYNC_STATUS,
156 COMPAT_FILE_SUBTYPE,
157 COMPAT_CAMERA_SHOT_KEY,
158
159 // PhotoAlbum table columns
160 COMPAT_ALBUM_SUBTYPE,
161
162 // Analysis table columns
163 TAG_ID,
164 FACE_ID,
165 LANDMARKS,
166 FEATURE,
167 CENTER_FEATURES,
168 STATUS,
169 OCR,
170 LABEL,
171 AESTHETICS_SCORE,
172 FACE,
173 OBJECT,
174 RECOMMENDATION,
175 SEGMENTATION,
176 COMPOSITION,
177 SALIENCY,
178 CATEGORY_ID
179 };
180
CheckWhiteList(const std::string & express)181 bool MediaLibraryCommonUtils::CheckWhiteList(const std::string &express)
182 {
183 return FILE_KEY_WHITE_LIST.find(express) != FILE_KEY_WHITE_LIST.end();
184 }
185
CheckExpressValidation(std::vector<std::string> & sepratedStr)186 bool MediaLibraryCommonUtils::CheckExpressValidation(std::vector<std::string> &sepratedStr)
187 {
188 for (auto &str : sepratedStr) {
189 ExtractKeyWord(str);
190 if (str.empty() || (str.size() == 1 && str == " ")) {
191 continue;
192 }
193 if (!CheckWhiteList(str)) {
194 MEDIA_ERR_LOG("Failed to check key word: %{private}s", str.c_str());
195 return false;
196 }
197 }
198
199 return true;
200 }
201
RemoveSpecialCondition(std::string & hacker,const std::string & pattern)202 void MediaLibraryCommonUtils::RemoveSpecialCondition(std::string &hacker, const std::string &pattern)
203 {
204 auto pos = hacker.find(pattern);
205 while (pos != std::string::npos) {
206 hacker.replace(pos, pos + pattern.size(), " ");
207 pos = hacker.find(pattern);
208 }
209 }
210
RemoveSpecialCondition(std::string & hacker)211 void MediaLibraryCommonUtils::RemoveSpecialCondition(std::string &hacker)
212 {
213 const std::string S1 = "not between ? and ?";
214 const std::string S2 = "between ? and ?";
215 const std::string S3 = "limit ?, ?";
216 RemoveSpecialCondition(hacker, S1);
217 RemoveSpecialCondition(hacker, S2);
218 RemoveSpecialCondition(hacker, S3);
219 }
220
SeprateSelection(std::string & strCondition,std::vector<std::string> & sepratedStr)221 void MediaLibraryCommonUtils::SeprateSelection(std::string &strCondition, std::vector<std::string> &sepratedStr)
222 {
223 // 0. transform to lower
224 std::transform(strCondition.begin(), strCondition.end(), strCondition.begin(), ::tolower);
225 // 1.remove brackets
226 std::regex bracketsPattern("\\(|\\)", std::regex_constants::ECMAScript | std::regex_constants::icase);
227 strCondition = regex_replace(strCondition, bracketsPattern, "");
228
229 // 2.remove redundant space
230 std::regex spacePattern("\\s+", std::regex_constants::ECMAScript | std::regex_constants::icase);
231 strCondition = regex_replace(strCondition, spacePattern, " ");
232
233 // 3. remove special condition
234 RemoveSpecialCondition(strCondition);
235
236 // 4. seprate core: according bound symbol,for example: and or ..
237 std::regex conditionPattern("\\s*and\\s+|\\s*or\\s+",
238 std::regex_constants::ECMAScript | std::regex_constants::icase);
239 std::sregex_token_iterator iter(strCondition.begin(), strCondition.end(), conditionPattern, -1);
240 decltype(iter) end;
241 while (iter != end) {
242 sepratedStr.push_back(iter->str());
243 ++iter;
244 }
245 }
246
CheckKeyWord(const std::string & strCondition)247 bool MediaLibraryCommonUtils::CheckKeyWord(const std::string &strCondition)
248 {
249 std::regex pattern("\\s*exec\\s*|\\s*insert\\s*|\\s*delete\\s*|\\s*update\\s*|" \
250 "\\s*join\\s*|\\s*union\\s*|\\s*master\\s*|\\s*truncate\\s*",
251 std::regex_constants::ECMAScript | std::regex_constants::icase);
252
253 if (regex_search(strCondition, pattern)) {
254 return false;
255 }
256
257 return true;
258 }
259
CheckIllegalCharacter(const std::string & strCondition)260 bool MediaLibraryCommonUtils::CheckIllegalCharacter(const std::string &strCondition)
261 {
262 /* if strCondition contains ';', it will be sepreate to two clause */
263 if (strCondition.find(';') == std::string::npos) {
264 return true;
265 }
266 /* other check to do */
267 return false;
268 }
269
CheckWhereClause(const std::string & whereClause)270 bool MediaLibraryCommonUtils::CheckWhereClause(const std::string &whereClause)
271 {
272 MediaLibraryTracer tracer;
273 tracer.Start("CommonUtils::CheckWhereClause");
274 if (whereClause.empty() || (whereClause.size() == 1 && whereClause == " ")) {
275 return true;
276 }
277 /* check whether query condition has illegal character */
278 if (!CheckIllegalCharacter(whereClause)) {
279 MEDIA_ERR_LOG("CheckIllegalCharacter is failed!");
280 return false;
281 }
282
283 /* check whether query condition has key word */
284 if (!CheckKeyWord(whereClause)) {
285 MEDIA_ERR_LOG("CheckKeyWord is failed!");
286 return false;
287 }
288
289 std::vector<std::string> sepratedStr;
290 auto args = whereClause;
291 SeprateSelection(args, sepratedStr);
292 /* check every query condition */
293 return CheckExpressValidation(sepratedStr);
294 }
295
AppendSelections(std::string & selections)296 void MediaLibraryCommonUtils::AppendSelections(std::string &selections)
297 {
298 if (selections.empty()) {
299 return;
300 }
301 selections = "(" + selections + ")";
302 }
303 } // namespace Media
304 } // namespace OHOS
305