GCC Code Coverage Report

Directory: cvmfs/
File: cvmfs/sanitizer.cc
Date: 2025-11-09 02:35:23
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 35476 CharRange::CharRange(const char range_begin, const char range_end) {
21 35476 range_begin_ = range_begin;
22 35476 range_end_ = range_end;
23 35476 }
24
25
26 30658 CharRange::CharRange(const char single_char) {
27 30658 range_begin_ = range_end_ = single_char;
28 30658 }
29
30
31 449958 bool CharRange::InRange(const char c) const {
32
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 449958 return (c >= range_begin_) && (c <= range_end_);
33 }
34
35
36 //------------------------------------------------------------------------------
37
38
39 30075 InputSanitizer::InputSanitizer(const string &whitelist) : max_length_(-1) {
40
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 30075 InitValidRanges(whitelist);
41 30075 }
42
43
44 143 InputSanitizer::InputSanitizer(const string &whitelist, int max_length)
45 143 : max_length_(max_length) {
46
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 143 InitValidRanges(whitelist);
47 143 }
48
49
50 30218 void InputSanitizer::InitValidRanges(const std::string &whitelist) {
51 // Parse the whitelist
52 30218 const unsigned length = whitelist.length();
53 30218 unsigned pickup_pos = 0;
54
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 131828 for (unsigned i = 0; i < length; ++i) {
55
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 101610 if ((i + 1 >= length) || (whitelist[i + 1] == ' ') || (i == length - 1)) {
56
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 66134 const string range = whitelist.substr(pickup_pos, i - pickup_pos + 1);
57
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 66134 switch (range.length()) {
58 30658 case 1:
59
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 30658 valid_ranges_.push_back(CharRange(range[0]));
60 30658 break;
61 35476 case 2:
62
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 35476 valid_ranges_.push_back(CharRange(range[0], range[1]));
63 35476 break;
64 ✗ default:
65 ✗ assert(false);
66 }
67 66134 ++i;
68 66134 pickup_pos = i + 1;
69 66134 }
70 }
71 30218 }
72
73
74 32532 bool InputSanitizer::Sanitize(std::string::const_iterator begin,
75 std::string::const_iterator end,
76 std::string *filtered_output) const {
77 32532 int pos = 0;
78 32532 bool is_sane = true;
79
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 324475 for (; begin != end; ++begin) {
80
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 292127 if (CheckRanges(*begin)) {
81
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 225869 if ((max_length_ >= 0) && (pos >= max_length_)) {
82 184 is_sane = false;
83 184 break;
84 }
85 225685 filtered_output->push_back(*begin);
86 225685 pos++;
87 } else {
88 66258 is_sane = false;
89 }
90 }
91 32532 return is_sane;
92 }
93
94
95 292127 bool InputSanitizer::CheckRanges(const char chr) const {
96
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 516216 for (unsigned j = 0; j < valid_ranges_.size(); ++j) {
97
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 449958 if (valid_ranges_[j].InRange(chr)) {
98 225869 return true;
99 }
100 }
101 66258 return false;
102 }
103
104
105 1104 string InputSanitizer::Filter(const std::string &input) const {
106 1104 string filtered_output;
107
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 1104 Sanitize(input, &filtered_output);
108 1104 return filtered_output;
109 }
110
111
112 31520 bool InputSanitizer::IsValid(const std::string &input) const {
113 31520 string dummy;
114
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 63040 return Sanitize(input, &dummy);
115 31520 }
116
117
118 964 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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 964 if (std::distance(begin, end) == 0) {
122 46 return false;
123 }
124
125
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 918 if (*begin == '-') {
126 // minus is allowed as the first character!
127 92 filtered_output->push_back('-');
128 92 begin++;
129 }
130
131 918 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