src/format/Quoting.cc

   1 #include "squid.h"
   2 #include "format/Quoting.h"
   3
   4 static const char c2x[] =
   5     "000102030405060708090a0b0c0d0e0f"
   6     "101112131415161718191a1b1c1d1e1f"
   7     "202122232425262728292a2b2c2d2e2f"
   8     "303132333435363738393a3b3c3d3e3f"
   9     "404142434445464748494a4b4c4d4e4f"
  10     "505152535455565758595a5b5c5d5e5f"
  11     "606162636465666768696a6b6c6d6e6f"
  12     "707172737475767778797a7b7c7d7e7f"
  13     "808182838485868788898a8b8c8d8e8f"
  14     "909192939495969798999a9b9c9d9e9f"
  15     "a0a1a2a3a4a5a6a7a8a9aaabacadaeaf"
  16     "b0b1b2b3b4b5b6b7b8b9babbbcbdbebf"
  17     "c0c1c2c3c4c5c6c7c8c9cacbcccdcecf"
  18     "d0d1d2d3d4d5d6d7d8d9dadbdcdddedf"
  19     "e0e1e2e3e4e5e6e7e8e9eaebecedeeef"
  20     "f0f1f2f3f4f5f6f7f8f9fafbfcfdfeff";
  21
  22 #if DEAD_USING_QUOTEMIMEBLOB
  23 /** copy of Log::QuoteMimeBlob. Bugs there will be found here.
  24  * This omits [] characters but is otherwise identical to Log::QuoteMimeBlob when OLD_LOG_MIME = 1
  25  */
  26 static char *
  27 username_quote(const char *header)
  28 {
  29     int c;
  30     int i;
  31     char *buf;
  32     char *buf_cursor;
  33
  34     if (header == NULL) {
  35         buf = static_cast<char *>(xcalloc(1, 1));
  36         *buf = '\0';
  37         return buf;
  38     }
  39
  40     buf = static_cast<char *>(xcalloc(1, (strlen(header) * 3) + 1));
  41     buf_cursor = buf;
  42     /*
  43      * We escape: space \x00-\x1F and space (0x40) and \x7F-\xFF
  44      * to prevent garbage in the logs. CR and LF are also there just in case.
  45      */
  46
  47     while ((c = *(const unsigned char *) header++) != '\0') {
  48         if (c == '\r') {
  49             *buf_cursor = '\\';
  50             ++buf_cursor;
  51             *buf_cursor = 'r';
  52             ++buf_cursor;
  53         } else if (c == '\n') {
  54             *buf_cursor = '\\';
  55             ++buf_cursor;
  56             *buf_cursor = 'n';
  57             ++buf_cursor;
  58         } else if (c <= 0x1F
  59                    || c >= 0x7F
  60                    || c == '%'
  61                    || c == ' ') {
  62             *buf_cursor = '%';
  63             ++buf_cursor;
  64             i = c * 2;
  65             *buf_cursor = c2x[i];
  66             ++buf_cursor;
  67             *buf_cursor = c2x[i + 1];
  68             ++buf_cursor;
  69         } else {
  70             *buf_cursor = (char) c;
  71             ++buf_cursor;
  72         }
  73     }
  74
  75     *buf_cursor = '\0';
  76     return buf;
  77 }
  78 #endif // DEAD
  79
  80 char *
  81 Format::QuoteUrlEncodeUsername(const char *name)
  82 {
  83     if (NULL == name)
  84         return NULL;
  85
  86     if (name[0] == '\0')
  87         return NULL;
  88
  89     return QuoteMimeBlob(name);
  90 //    return username_quote(name);
  91 }
  92
  93 char *
  94 Format::QuoteMimeBlob(const char *header)
  95 {
  96     int c;
  97     int i;
  98     char *buf;
  99     char *buf_cursor;
 100
 101     if (header == NULL) {
 102         buf = static_cast<char *>(xcalloc(1, 1));
 103         *buf = '\0';
 104         return buf;
 105     }
 106
 107     buf = static_cast<char *>(xcalloc(1, (strlen(header) * 3) + 1));
 108     buf_cursor = buf;
 109     /**
 110      * Whe OLD_LOG_MIME is defined we escape: \x00-\x1F"#%;<>?{}|\\\\^~`\[\]\x7F-\xFF
 111      * which is the default escape list for the CPAN Perl5 URI module
 112      * modulo the inclusion of space (x40) to make the raw logs a bit
 113      * more readable.
 114      */
 115
 116     while ((c = *(const unsigned char *) header++) != '\0') {
 117 #if !OLD_LOG_MIME
 118         if (c == '\r') {
 119             *buf_cursor++ = '\\';
 120             *buf_cursor++ = 'r';
 121         } else if (c == '\n') {
 122             *buf_cursor++ = '\\';
 123             *buf_cursor++ = 'n';
 124         } else
 125 #endif
 126             if (c <= 0x1F
 127                     || c >= 0x7F
 128                     || c == '%'
 129 #if OLD_LOG_MIME
 130                     || c == '"'
 131                     || c == '#'
 132                     || c == ';'
 133                     || c == '<'
 134                     || c == '>'
 135                     || c == '?'
 136                     || c == '{'
 137                     || c == '}'
 138                     || c == '|'
 139                     || c == '\\'
 140                     || c == '^'
 141                     || c == '~'
 142                     || c == '`'
 143 #endif
 144                     || c == '['
 145                     || c == ']') {
 146                 *buf_cursor++ = '%';
 147                 i = c * 2;
 148                 *buf_cursor++ = c2x[i];
 149                 *buf_cursor++ = c2x[i + 1];
 150 #if !OLD_LOG_MIME
 151
 152             } else if (c == '\\') {
 153                 *buf_cursor++ = '\\';
 154                 *buf_cursor++ = '\\';
 155 #endif
 156
 157             } else {
 158                 *buf_cursor++ = (char) c;
 159             }
 160     }
 161
 162     *buf_cursor = '\0';
 163     return buf;
 164 }