GCC Code Coverage Report

Directory: cvmfs/
File: cvmfs/sanitizer.cc
Date: 2025-11-30 02:35:17
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 14957 CharRange::CharRange(const char range_begin, const char range_end) {
21 14957 range_begin_ = range_begin;
22 14957 range_end_ = range_end;
23 14957 }
24
25
26 13695 CharRange::CharRange(const char single_char) {
27 13695 range_begin_ = range_end_ = single_char;
28 13695 }
29
30
31 165716 bool CharRange::InRange(const char c) const {
32
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 165716 return (c >= range_begin_) && (c <= range_end_);
33 }
34
35
36 //------------------------------------------------------------------------------
37
38
39 13425 InputSanitizer::InputSanitizer(const string &whitelist) : max_length_(-1) {
40
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 13425 InitValidRanges(whitelist);
41 13425 }
42
43
44 71 InputSanitizer::InputSanitizer(const string &whitelist, int max_length)
45 71 : max_length_(max_length) {
46
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 71 InitValidRanges(whitelist);
47 71 }
48
49
50 13496 void InputSanitizer::InitValidRanges(const std::string &whitelist) {
51 // Parse the whitelist
52 13496 const unsigned length = whitelist.length();
53 13496 unsigned pickup_pos = 0;
54
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 57105 for (unsigned i = 0; i < length; ++i) {
55
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 43609 if ((i + 1 >= length) || (whitelist[i + 1] == ' ') || (i == length - 1)) {
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 28652 const string range = whitelist.substr(pickup_pos, i - pickup_pos + 1);
57
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 28652 switch (range.length()) {
58 13695 case 1:
59
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 13695 valid_ranges_.push_back(CharRange(range[0]));
60 13695 break;
61 14957 case 2:
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 14957 valid_ranges_.push_back(CharRange(range[0], range[1]));
63 14957 break;
64 ✗ default:
65 ✗ assert(false);
66 }
67 28652 ++i;
68 28652 pickup_pos = i + 1;
69 28652 }
70 }
71 13496 }
72
73
74 14120 bool InputSanitizer::Sanitize(std::string::const_iterator begin,
75 std::string::const_iterator end,
76 std::string *filtered_output) const {
77 14120 int pos = 0;
78 14120 bool is_sane = true;
79
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 128828 for (; begin != end; ++begin) {
80
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 114760 if (CheckRanges(*begin)) {
81
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 95915 if ((max_length_ >= 0) && (pos >= max_length_)) {
82 52 is_sane = false;
83 52 break;
84 }
85 95863 filtered_output->push_back(*begin);
86 95863 pos++;
87 } else {
88 18845 is_sane = false;
89 }
90 }
91 14120 return is_sane;
92 }
93
94
95 114760 bool InputSanitizer::CheckRanges(const char chr) const {
96
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 184561 for (unsigned j = 0; j < valid_ranges_.size(); ++j) {
97
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 165716 if (valid_ranges_[j].InRange(chr)) {
98 95915 return true;
99 }
100 }
101 18845 return false;
102 }
103
104
105 336 string InputSanitizer::Filter(const std::string &input) const {
106 336 string filtered_output;
107
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 336 Sanitize(input, &filtered_output);
108 336 return filtered_output;
109 }
110
111
112 13810 bool InputSanitizer::IsValid(const std::string &input) const {
113 13810 string dummy;
114
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 27620 return Sanitize(input, &dummy);
115 13810 }
116
117
118 310 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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 310 if (std::distance(begin, end) == 0) {
122 13 return false;
123 }
124
125
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 297 if (*begin == '-') {
126 // minus is allowed as the first character!
127 26 filtered_output->push_back('-');
128 26 begin++;
129 }
130
131 297 return InputSanitizer::Sanitize(begin, end, filtered_output);
132 }
133
134
135 130 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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 130 if (std::distance(begin, end) == 0) {
139 13 return false;
140 }
141
142 117 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