GCC Code Coverage Report

Directory: cvmfs/
File: cvmfs/sanitizer.cc
Date: 2026-07-12 02:35:48
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 33101 CharRange::CharRange(const char range_begin, const char range_end) {
21 33101 range_begin_ = range_begin;
22 33101 range_end_ = range_end;
23 33101 }
24
25
26 31546 CharRange::CharRange(const char single_char) {
27 31546 range_begin_ = range_end_ = single_char;
28 31546 }
29
30
31 326153 bool CharRange::InRange(const char c) const {
32
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 326153 return (c >= range_begin_) && (c <= range_end_);
33 }
34
35
36 //------------------------------------------------------------------------------
37
38
39 30688 InputSanitizer::InputSanitizer(const string &whitelist) : max_length_(-1) {
40
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 30688 InitValidRanges(whitelist);
41 30688 }
42
43
44 236 InputSanitizer::InputSanitizer(const string &whitelist, int max_length)
45 236 : max_length_(max_length) {
46
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 236 InitValidRanges(whitelist);
47 236 }
48
49
50 30924 void InputSanitizer::InitValidRanges(const std::string &whitelist) {
51 // Parse the whitelist
52 30924 const unsigned length = whitelist.length();
53 30924 unsigned pickup_pos = 0;
54
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 128672 for (unsigned i = 0; i < length; ++i) {
55
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 97748 if ((i + 1 >= length) || (whitelist[i + 1] == ' ') || (i == length - 1)) {
56
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 64647 const string range = whitelist.substr(pickup_pos, i - pickup_pos + 1);
57
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 64647 switch (range.length()) {
58 31546 case 1:
59
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 31546 valid_ranges_.push_back(CharRange(range[0]));
60 31546 break;
61 33101 case 2:
62
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 33101 valid_ranges_.push_back(CharRange(range[0], range[1]));
63 33101 break;
64 ✗ default:
65 ✗ assert(false);
66 }
67 64647 ++i;
68 64647 pickup_pos = i + 1;
69 64647 }
70 }
71 30924 }
72
73
74 33012 bool InputSanitizer::Sanitize(std::string::const_iterator begin,
75 std::string::const_iterator end,
76 std::string *filtered_output) const {
77 33012 int pos = 0;
78 33012 bool is_sane = true;
79
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 270835 for (; begin != end; ++begin) {
80
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 238019 if (CheckRanges(*begin)) {
81
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 212335 if ((max_length_ >= 0) && (pos >= max_length_)) {
82 196 is_sane = false;
83 196 break;
84 }
85 212139 filtered_output->push_back(*begin);
86 212139 pos++;
87 } else {
88 25684 is_sane = false;
89 }
90 }
91 33012 return is_sane;
92 }
93
94
95 238019 bool InputSanitizer::CheckRanges(const char chr) const {
96
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 351837 for (unsigned j = 0; j < valid_ranges_.size(); ++j) {
97
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 326153 if (valid_ranges_[j].InRange(chr)) {
98 212335 return true;
99 }
100 }
101 25684 return false;
102 }
103
104
105 1116 string InputSanitizer::Filter(const std::string &input) const {
106 1116 string filtered_output;
107
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 1116 Sanitize(input, &filtered_output);
108 1116 return filtered_output;
109 }
110
111
112 31994 bool InputSanitizer::IsValid(const std::string &input) const {
113 31994 string dummy;
114
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 63988 return Sanitize(input, &dummy);
115 31994 }
116
117
118 874 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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 874 if (std::distance(begin, end) == 0) {
122 49 return false;
123 }
124
125
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 825 if (*begin == '-') {
126 // minus is allowed as the first character!
127 98 filtered_output->push_back('-');
128 98 begin++;
129 }
130
131 825 return InputSanitizer::Sanitize(begin, end, filtered_output);
132 }
133
134
135 490 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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 490 if (std::distance(begin, end) == 0) {
139 49 return false;
140 }
141
142 441 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