GCC Code Coverage Report

Directory: cvmfs/
File: cvmfs/sanitizer.cc
Date: 2025-12-07 02:35:36
Exec Total Coverage
Lines: 69 71 97.2%
Branches: 40 49 81.6%
Line Branch Exec Source
1 /**
2 * This file is part of the CernVM File System.
3 *
4 * Provides input data sanitizer in the form of whitelist of character ranges.
5 */
6
7
8 #include "sanitizer.h"
9
10 #include <cassert>
11
12 using namespace std; // NOLINT
13
14 #ifdef CVMFS_NAMESPACE_GUARD
15 namespace CVMFS_NAMESPACE_GUARD {
16 #endif
17
18 namespace sanitizer {
19
20 24171 CharRange::CharRange(const char range_begin, const char range_end) {
21 24171 range_begin_ = range_begin;
22 24171 range_end_ = range_end;
23 24171 }
24
25
26 19501 CharRange::CharRange(const char single_char) {
27 19501 range_begin_ = range_end_ = single_char;
28 19501 }
29
30
31 343948 bool CharRange::InRange(const char c) const {
32
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 343948 return (c >= range_begin_) && (c <= range_end_);
33 }
34
35
36 //------------------------------------------------------------------------------
37
38
39 19267 InputSanitizer::InputSanitizer(const string &whitelist) : max_length_(-1) {
40
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 19267 InitValidRanges(whitelist);
41 19267 }
42
43
44 98 InputSanitizer::InputSanitizer(const string &whitelist, int max_length)
45 98 : max_length_(max_length) {
46
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 98 InitValidRanges(whitelist);
47 98 }
48
49
50 19365 void InputSanitizer::InitValidRanges(const std::string &whitelist) {
51 // Parse the whitelist
52 19365 const unsigned length = whitelist.length();
53 19365 unsigned pickup_pos = 0;
54
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 87208 for (unsigned i = 0; i < length; ++i) {
55
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 67843 if ((i + 1 >= length) || (whitelist[i + 1] == ' ') || (i == length - 1)) {
56
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 43672 const string range = whitelist.substr(pickup_pos, i - pickup_pos + 1);
57
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 43672 switch (range.length()) {
58 19501 case 1:
59
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 19501 valid_ranges_.push_back(CharRange(range[0]));
60 19501 break;
61 24171 case 2:
62
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 24171 valid_ranges_.push_back(CharRange(range[0], range[1]));
63 24171 break;
64 ✗ default:
65 ✗ assert(false);
66 }
67 43672 ++i;
68 43672 pickup_pos = i + 1;
69 43672 }
70 }
71 19365 }
72
73
74 21743 bool InputSanitizer::Sanitize(std::string::const_iterator begin,
75 std::string::const_iterator end,
76 std::string *filtered_output) const {
77 21743 int pos = 0;
78 21743 bool is_sane = true;
79
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 233880 for (; begin != end; ++begin) {
80
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 212321 if (CheckRanges(*begin)) {
81
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 153271 if ((max_length_ >= 0) && (pos >= max_length_)) {
82 184 is_sane = false;
83 184 break;
84 }
85 153087 filtered_output->push_back(*begin);
86 153087 pos++;
87 } else {
88 59050 is_sane = false;
89 }
90 }
91 21743 return is_sane;
92 }
93
94
95 212321 bool InputSanitizer::CheckRanges(const char chr) const {
96
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 402998 for (unsigned j = 0; j < valid_ranges_.size(); ++j) {
97
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 343948 if (valid_ranges_[j].InRange(chr)) {
98 153271 return true;
99 }
100 }
101 59050 return false;
102 }
103
104
105 936 string InputSanitizer::Filter(const std::string &input) const {
106 936 string filtered_output;
107
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 936 Sanitize(input, &filtered_output);
108 936 return filtered_output;
109 }
110
111
112 20899 bool InputSanitizer::IsValid(const std::string &input) const {
113 20899 string dummy;
114
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 41798 return Sanitize(input, &dummy);
115 20899 }
116
117
118 1060 bool IntegerSanitizer::Sanitize(std::string::const_iterator begin,
119 std::string::const_iterator end,
120 std::string *filtered_output) const {
121
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 1060 if (std::distance(begin, end) == 0) {
122 46 return false;
123 }
124
125
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 1014 if (*begin == '-') {
126 // minus is allowed as the first character!
127 92 filtered_output->push_back('-');
128 92 begin++;
129 }
130
131 1014 return InputSanitizer::Sanitize(begin, end, filtered_output);
132 }
133
134
135 460 bool PositiveIntegerSanitizer::Sanitize(std::string::const_iterator begin,
136 std::string::const_iterator end,
137 std::string *filtered_output) const {
138
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 460 if (std::distance(begin, end) == 0) {
139 46 return false;
140 }
141
142 414 return InputSanitizer::Sanitize(begin, end, filtered_output);
143 }
144
145 } // namespace sanitizer
146
147 #ifdef CVMFS_NAMESPACE_GUARD
148 } // namespace CVMFS_NAMESPACE_GUARD
149 #endif
150