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
16 #include "security_guard_utils.h"
17
18 #include <cerrno>
19 #include <fstream>
20
21 #include "security_guard_log.h"
22
23 namespace OHOS::Security::SecurityGuard {
24 namespace {
25 constexpr int32_t DEC_RADIX = 10;
26 constexpr int32_t HEX_RADIX = 16;
27 constexpr int32_t STR_INDEX = 2;
28 constexpr int32_t TIME_BUF_LEN = 32;
29 constexpr int32_t FILE_MAX_SIZE = 2 * 1024 * 1024; // byte
30 }
31
StrToU32(const std::string & str,uint32_t & value)32 bool SecurityGuardUtils::StrToU32(const std::string &str, uint32_t &value)
33 {
34 unsigned long long tmp = 0;
35 bool isOK = StrToULL(str, tmp);
36 value = static_cast<uint32_t>(tmp);
37 return isOK && (tmp <= UINT32_MAX);
38 }
39
StrToI64(const std::string & str,int64_t & value)40 bool SecurityGuardUtils::StrToI64(const std::string &str, int64_t &value)
41 {
42 long long tmp = 0;
43 bool isOK = StrToLL(str, tmp, DEC_RADIX);
44 value = tmp;
45 return isOK && (tmp >= INT64_MIN && tmp <= INT64_MAX);
46 }
47
StrToI64Hex(const std::string & str,int64_t & value)48 bool SecurityGuardUtils::StrToI64Hex(const std::string &str, int64_t &value)
49 {
50 long long tmp = 0;
51 bool isOK;
52 if (str.substr(0, STR_INDEX) == "0x") {
53 isOK = StrToLL(str, tmp, HEX_RADIX);
54 } else {
55 isOK = StrToLL(str, tmp, DEC_RADIX);
56 }
57 value = tmp;
58 return isOK && (tmp >= INT64_MIN && tmp <= INT64_MAX);
59 }
60
StrToLL(const std::string & str,long long & value,int32_t base)61 bool SecurityGuardUtils::StrToLL(const std::string &str, long long &value, int32_t base)
62 {
63 auto add = str.c_str();
64 char *end = nullptr;
65 errno = 0;
66 value = strtoll(add, &end, base);
67 if ((errno == ERANGE && (value == LLONG_MAX || value == LLONG_MIN)) || (errno != 0 && value == 0)) {
68 SGLOGE("strtoll converse error,str=%{public}s", str.c_str());
69 return false;
70 } else if (end == add) {
71 SGLOGE("strtoll no digit find");
72 return false;
73 } else if (end[0] != '\0') {
74 SGLOGE("strtoll no all digit");
75 return false;
76 }
77
78 return true;
79 }
80
StrToULL(const std::string & str,unsigned long long & value)81 bool SecurityGuardUtils::StrToULL(const std::string &str, unsigned long long &value)
82 {
83 auto add = str.c_str();
84 char *end = nullptr;
85 errno = 0;
86 value = strtoull(add, &end, DEC_RADIX);
87 if ((errno == ERANGE && value == ULLONG_MAX) || (errno != 0 && value == 0)) {
88 SGLOGE("strtoull converse error,str=%{public}s", str.c_str());
89 return false;
90 } else if (end == add) {
91 SGLOGE("strtoull no digit find");
92 return false;
93 } else if (end[0] != '\0') {
94 SGLOGE("strtoull no all digit");
95 return false;
96 }
97
98 return true;
99 }
100
GetDate()101 std::string SecurityGuardUtils::GetDate()
102 {
103 time_t timestamp = time(nullptr);
104 struct tm timeInfo{};
105 localtime_r(×tamp, &timeInfo);
106 char buf[TIME_BUF_LEN] = {};
107 if (strftime(buf, sizeof(buf), "%Y%m%d%H%M%S", &timeInfo) == 0) {
108 return "";
109 }
110 std::string data(buf);
111 return data;
112 }
113
CopyFile(const std::string & srcPath,const std::string & dstPath)114 bool SecurityGuardUtils::CopyFile(const std::string &srcPath, const std::string &dstPath)
115 {
116 std::ifstream src(srcPath, std::ios::binary);
117 if (!src.is_open() || !src) {
118 SGLOGE("copy file stream error");
119 src.close();
120 return false;
121 }
122 if (src.seekg(0, std::ios_base::end).tellg() > FILE_MAX_SIZE) {
123 SGLOGE("cfg file is too large");
124 src.close();
125 return false;
126 }
127 src.seekg(0, std::ios::beg);
128 std::ofstream dst(dstPath, std::ios::binary);
129 if (!dst.is_open() || !dst) {
130 SGLOGE("copy file stream error");
131 src.close();
132 dst.close();
133 return false;
134 }
135
136 dst << src.rdbuf();
137 src.close();
138 dst.close();
139 return true;
140 }
141 }