Quoting.cc
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1/*
2 * Copyright (C) 1996-2022 The Squid Software Foundation and contributors
3 *
4 * Squid software is distributed under GPLv2+ license and includes
5 * contributions from numerous individuals and organizations.
6 * Please see the COPYING and CONTRIBUTORS files for details.
7 */
8
9#include "squid.h"
10#include "format/Quoting.h"
11
12static const char c2x[] =
13 "000102030405060708090a0b0c0d0e0f"
14 "101112131415161718191a1b1c1d1e1f"
15 "202122232425262728292a2b2c2d2e2f"
16 "303132333435363738393a3b3c3d3e3f"
17 "404142434445464748494a4b4c4d4e4f"
18 "505152535455565758595a5b5c5d5e5f"
19 "606162636465666768696a6b6c6d6e6f"
20 "707172737475767778797a7b7c7d7e7f"
21 "808182838485868788898a8b8c8d8e8f"
22 "909192939495969798999a9b9c9d9e9f"
23 "a0a1a2a3a4a5a6a7a8a9aaabacadaeaf"
24 "b0b1b2b3b4b5b6b7b8b9babbbcbdbebf"
25 "c0c1c2c3c4c5c6c7c8c9cacbcccdcecf"
26 "d0d1d2d3d4d5d6d7d8d9dadbdcdddedf"
27 "e0e1e2e3e4e5e6e7e8e9eaebecedeeef"
28 "f0f1f2f3f4f5f6f7f8f9fafbfcfdfeff";
29
30char *
32{
33 if (nullptr == name)
34 return nullptr;
35
36 if (name[0] == '\0')
37 return nullptr;
38
39 return QuoteMimeBlob(name);
40}
41
42char *
43Format::QuoteMimeBlob(const char *header)
44{
45 int c;
46 int i;
47 char *buf;
48 char *buf_cursor;
49
50 if (header == nullptr) {
51 buf = static_cast<char *>(xcalloc(1, 1));
52 *buf = '\0';
53 return buf;
54 }
55
56 buf = static_cast<char *>(xcalloc(1, (strlen(header) * 3) + 1));
57 buf_cursor = buf;
58 /*
59 * Whe OLD_LOG_MIME is defined we escape: \x00-\x1F"#%;<>?{}|\\\\^~`\[\]\x7F-\xFF
60 * which is the default escape list for the CPAN Perl5 URI module
61 * modulo the inclusion of space (x40) to make the raw logs a bit
62 * more readable.
63 */
64
65 while ((c = *(const unsigned char *) header++) != '\0') {
66#if !OLD_LOG_MIME
67 if (c == '\r') {
68 *buf_cursor = '\\';
69 ++buf_cursor;
70 *buf_cursor = 'r';
71 ++buf_cursor;
72 } else if (c == '\n') {
73 *buf_cursor = '\\';
74 ++buf_cursor;
75 *buf_cursor = 'n';
76 ++buf_cursor;
77 } else
78#endif
79 if (c <= 0x1F
80 || c >= 0x7F
81 || c == '%'
82#if OLD_LOG_MIME
83 || c == '"'
84 || c == '#'
85 || c == ';'
86 || c == '<'
87 || c == '>'
88 || c == '?'
89 || c == '{'
90 || c == '}'
91 || c == '|'
92 || c == '\\'
93 || c == '^'
94 || c == '~'
95 || c == '`'
96#endif
97 || c == '['
98 || c == ']') {
99 *buf_cursor = '%';
100 ++buf_cursor;
101 i = c * 2;
102 *buf_cursor = c2x[i];
103 ++buf_cursor;
104 *buf_cursor = c2x[i + 1];
105 ++buf_cursor;
106#if !OLD_LOG_MIME
107
108 } else if (c == '\\') {
109 *buf_cursor = '\\';
110 ++buf_cursor;
111 *buf_cursor = '\\';
112 ++buf_cursor;
113#endif
114
115 } else {
116 *buf_cursor = (char) c;
117 ++buf_cursor;
118 }
119 }
120
121 *buf_cursor = '\0';
122 return buf;
123}
124
static const char c2x[]
Definition: Quoting.cc:12
char * QuoteMimeBlob(const char *header)
Definition: Quoting.cc:43
char * QuoteUrlEncodeUsername(const char *name)
Definition: Quoting.cc:31
void * xcalloc(size_t n, size_t sz)
Definition: xalloc.cc:71

 

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