GCC Code Coverage Report

Directory: cvmfs/
File: cvmfs/sanitizer.cc
Date: 2026-08-02 02:40:19
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 27925 CharRange::CharRange(const char range_begin, const char range_end) {
21 27925 range_begin_ = range_begin;
22 27925 range_end_ = range_end;
23 27925 }
24
25
26 25686 CharRange::CharRange(const char single_char) {
27 25686 range_begin_ = range_end_ = single_char;
28 25686 }
29
30
31 295566 bool CharRange::InRange(const char c) const {
32
4/4
✓ Branch 0 taken 239402 times.
✓ Branch 1 taken 56164 times.
✓ Branch 2 taken 182345 times.
✓ Branch 3 taken 57057 times.
 295566 return (c >= range_begin_) && (c <= range_end_);
33 }
34
35
36 //------------------------------------------------------------------------------
37
38
39 25487 InputSanitizer::InputSanitizer(const string &whitelist) : max_length_(-1) {
40
1/2
✓ Branch 1 taken 25487 times.
✗ Branch 2 not taken.
 25487 InitValidRanges(whitelist);
41 25487 }
42
43
44 185 InputSanitizer::InputSanitizer(const string &whitelist, int max_length)
45 185 : max_length_(max_length) {
46
1/2
✓ Branch 1 taken 185 times.
✗ Branch 2 not taken.
 185 InitValidRanges(whitelist);
47 185 }
48
49
50 25672 void InputSanitizer::InitValidRanges(const std::string &whitelist) {
51 // Parse the whitelist
52 25672 const unsigned length = whitelist.length();
53 25672 unsigned pickup_pos = 0;
54
2/2
✓ Branch 0 taken 81536 times.
✓ Branch 1 taken 25672 times.
 107208 for (unsigned i = 0; i < length; ++i) {
55
7/8
✓ Branch 0 taken 55901 times.
✓ Branch 1 taken 25635 times.
✓ Branch 3 taken 27925 times.
✓ Branch 4 taken 27976 times.
✗ Branch 5 not taken.
✓ Branch 6 taken 27925 times.
✓ Branch 7 taken 53611 times.
✓ Branch 8 taken 27925 times.
 81536 if ((i + 1 >= length) || (whitelist[i + 1] == ' ') || (i == length - 1)) {
56
1/2
✓ Branch 1 taken 53611 times.
✗ Branch 2 not taken.
 53611 const string range = whitelist.substr(pickup_pos, i - pickup_pos + 1);
57
2/3
✓ Branch 1 taken 25686 times.
✓ Branch 2 taken 27925 times.
✗ Branch 3 not taken.
 53611 switch (range.length()) {
58 25686 case 1:
59
1/2
✓ Branch 3 taken 25686 times.
✗ Branch 4 not taken.
 25686 valid_ranges_.push_back(CharRange(range[0]));
60 25686 break;
61 27925 case 2:
62
1/2
✓ Branch 4 taken 27925 times.
✗ Branch 5 not taken.
 27925 valid_ranges_.push_back(CharRange(range[0], range[1]));
63 27925 break;
64 ✗ default:
65 ✗ assert(false);
66 }
67 53611 ++i;
68 53611 pickup_pos = i + 1;
69 53611 }
70 }
71 25672 }
72
73
74 27264 bool InputSanitizer::Sanitize(std::string::const_iterator begin,
75 std::string::const_iterator end,
76 std::string *filtered_output) const {
77 27264 int pos = 0;
78 27264 bool is_sane = true;
79
2/2
✓ Branch 2 taken 210709 times.
✓ Branch 3 taken 27116 times.
 237825 for (; begin != end; ++begin) {
80
2/2
✓ Branch 2 taken 182345 times.
✓ Branch 3 taken 28364 times.
 210709 if (CheckRanges(*begin)) {
81
4/4
✓ Branch 0 taken 1813 times.
✓ Branch 1 taken 180532 times.
✓ Branch 2 taken 148 times.
✓ Branch 3 taken 1665 times.
 182345 if ((max_length_ >= 0) && (pos >= max_length_)) {
82 148 is_sane = false;
83 148 break;
84 }
85 182197 filtered_output->push_back(*begin);
86 182197 pos++;
87 } else {
88 28364 is_sane = false;
89 }
90 }
91 27264 return is_sane;
92 }
93
94
95 210709 bool InputSanitizer::CheckRanges(const char chr) const {
96
2/2
✓ Branch 1 taken 295566 times.
✓ Branch 2 taken 28364 times.
 323930 for (unsigned j = 0; j < valid_ranges_.size(); ++j) {
97
2/2
✓ Branch 2 taken 182345 times.
✓ Branch 3 taken 113221 times.
 295566 if (valid_ranges_[j].InRange(chr)) {
98 182345 return true;
99 }
100 }
101 28364 return false;
102 }
103
104
105 468 string InputSanitizer::Filter(const std::string &input) const {
106 468 string filtered_output;
107
1/2
✓ Branch 1 taken 468 times.
✗ Branch 2 not taken.
 468 Sanitize(input, &filtered_output);
108 468 return filtered_output;
109 }
110
111
112 26870 bool InputSanitizer::IsValid(const std::string &input) const {
113 26870 string dummy;
114
1/2
✓ Branch 1 taken 26870 times.
✗ Branch 2 not taken.
 53740 return Sanitize(input, &dummy);
115 26870 }
116
117
118 850 bool IntegerSanitizer::Sanitize(std::string::const_iterator begin,
119 std::string::const_iterator end,
120 std::string *filtered_output) const {
121
2/2
✓ Branch 1 taken 37 times.
✓ Branch 2 taken 813 times.
 850 if (std::distance(begin, end) == 0) {
122 37 return false;
123 }
124
125
2/2
✓ Branch 1 taken 74 times.
✓ Branch 2 taken 739 times.
 813 if (*begin == '-') {
126 // minus is allowed as the first character!
127 74 filtered_output->push_back('-');
128 74 begin++;
129 }
130
131 813 return InputSanitizer::Sanitize(begin, end, filtered_output);
132 }
133
134
135 370 bool PositiveIntegerSanitizer::Sanitize(std::string::const_iterator begin,
136 std::string::const_iterator end,
137 std::string *filtered_output) const {
138
2/2
✓ Branch 1 taken 37 times.
✓ Branch 2 taken 333 times.
 370 if (std::distance(begin, end) == 0) {
139 37 return false;
140 }
141
142 333 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