functions/imap_utf7_local.php

   1 <?php
   2
   3 /**
   4  * imap_general.php
   5  *
   6  * Copyright (c) 1999-2003 The SquirrelMail Project Team
   7  * Licensed under the GNU GPL. For full terms see the file COPYING.
   8  *
   9  * This implements all functions that do general imap functions.
  10  *
  11  * $Id $
  12  */
  13
  14 function imap_utf7_encode_local($s) {
  15     global $languages, $squirrelmail_language;
  16
  17     if (isset($languages[$squirrelmail_language]['XTRA_CODE']) &&
  18         function_exists($languages[$squirrelmail_language]['XTRA_CODE'])) {
  19         return $languages[$squirrelmail_language]['XTRA_CODE']('utf7-imap_encode', $s);
  20     }
  21
  22         $b64_s = '';    // buffer for substring to be base64-encoded
  23         $utf7_s = '';   // imap-utf7-encoded string
  24         for ($i = 0; $i < strlen($s); $i++) {
  25                 $c = $s[$i];
  26                 $ord_c = ord($c);
  27                 if ((($ord_c >= 0x20) and ($ord_c <= 0x25)) or
  28                     (($ord_c >= 0x27) and ($ord_c <= 0x7e))) {
  29                         if ($b64_s) {
  30                                 $utf7_s = $utf7_s . '&' . encodeBASE64($b64_s) .'-';
  31                                 $b64_s = '';
  32                         }
  33                         $utf7_s = $utf7_s . $c;
  34                 } elseif ($ord_c == 0x26) {
  35                         if ($b64_s) {
  36                                 $utf7_s = $utf7_s . '&' . encodeBASE64($b64_s) . '-';
  37                                 $b64_s = '';
  38                         }
  39                         $utf7_s = $utf7_s . '&-';
  40                 } else {
  41                         $b64_s = $b64_s . chr(0) . $c;
  42                 }
  43         }
  44         //
  45         // flush buffer
  46         //
  47         if ($b64_s) {
  48                 $utf7_s = $utf7_s . '&' . encodeBASE64($b64_s) . '-';
  49                 $b64_s = '';
  50         }
  51         return $utf7_s;
  52 }
  53
  54 function imap_utf7_decode_local($s) {
  55     global $languages, $squirrelmail_language;
  56
  57     if (isset($languages[$squirrelmail_language]['XTRA_CODE']) &&
  58         function_exists($languages[$squirrelmail_language]['XTRA_CODE'])) {
  59         return $languages[$squirrelmail_language]['XTRA_CODE']('utf7-imap_decode', $s);
  60     }
  61
  62         $b64_s = '';
  63         $iso_8859_1_s = '';
  64         for ($i = 0, $len = strlen($s); $i < $len; $i++) {
  65                 $c = $s[$i];
  66                 if (strlen($b64_s) > 0) {
  67                         if ($c == '-') {
  68                                 if ($b64_s == '&') {
  69                                         $iso_8859_1_s = $iso_8859_1_s . '&';
  70                                 } else {
  71                                         $iso_8859_1_s = $iso_8859_1_s .
  72                                           decodeBASE64(substr($b64_s, 1));
  73                                 }
  74                                 $b64_s = '';
  75                         } else {
  76                                 $b64_s = $b64_s . $c;
  77                         }
  78                 } else {
  79                         if ($c == '&') {
  80                                 $b64_s = '&';
  81                         } else {
  82                                 $iso_8859_1_s = $iso_8859_1_s . $c;
  83                         }
  84                 }
  85         }
  86         return $iso_8859_1_s;
  87 }
  88
  89 function encodeBASE64($s) {
  90         $B64Chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+,';
  91         $p = 0;         // phase: 1 / 2 / 3 / 1 / 2 / 3...
  92         $e = '';        // base64-encoded string
  93         //foreach($s as $c) {
  94         for ($i = 0; $i < strlen($s); $i++) {
  95                 $c = $s[$i];
  96                 if ($p == 0) {
  97                         $e = $e . substr($B64Chars, ((ord($c) & 252) >> 2), 1);
  98                         $t = (ord($c) & 3);
  99                         $p = 1;
 100                 } elseif ($p == 1) {
 101                         $e = $e . $B64Chars[($t << 4) + ((ord($c) & 240) >> 4)];
 102                         $t = (ord($c) & 15);
 103                         $p = 2;
 104                 } elseif ($p == 2) {
 105                         $e = $e . $B64Chars[($t << 2) + ((ord($c) & 192) >> 6)];
 106                         $e = $e . $B64Chars[ord($c) & 63];
 107                         $p = 0;
 108                 }
 109         }
 110         //
 111         // flush buffer
 112         //
 113         if ($p == 1) {
 114                 $e = $e . $B64Chars[$t << 4];
 115         } elseif ($p == 2) {
 116                 $e = $e . $B64Chars[$t << 2];
 117         }
 118         return $e;
 119 }
 120
 121 function decodeBASE64($s) {
 122         $B64Values = array(
 123                 'A' =>  0, 'B' =>  1, 'C' =>  2, 'D' =>  3, 'E' =>  4, 'F' =>  5,
 124                 'G' =>  6, 'H' =>  7, 'I' =>  8, 'J' =>  9, 'K' => 10, 'L' => 11,
 125                 'M' => 12, 'N' => 13, 'O' => 14, 'P' => 15, 'Q' => 16, 'R' => 17,
 126                 'S' => 18, 'T' => 19, 'U' => 20, 'V' => 21, 'W' => 22, 'X' => 23,
 127                 'Y' => 24, 'Z' => 25,
 128                 'a' => 26, 'b' => 27, 'c' => 28, 'd' => 29, 'e' => 30, 'f' => 31,
 129                 'g' => 32, 'h' => 33, 'i' => 34, 'j' => 35, 'k' => 36, 'l' => 37,
 130                 'm' => 38, 'n' => 39, 'o' => 40, 'p' => 41, 'q' => 42, 'r' => 43,
 131                 's' => 44, 't' => 45, 'u' => 46, 'v' => 47, 'w' => 48, 'x' => 49,
 132                 'y' => 50, 'z' => 51,
 133                 '0' => 52, '1' => 53, '2' => 54, '3' => 55, '4' => 56, '5' => 57,
 134                 '6' => 58, '7' => 59, '8' => 60, '9' => 61, '+' => 62, ',' => 63
 135         );
 136         $p = 0;
 137         $d = '';
 138         $unicodeNullByteToggle = 0;
 139         for ($i = 0, $len = strlen($s); $i < $len; $i++) {
 140                 $c = $s[$i];
 141                 if ($p == 0) {
 142                         $t = $B64Values[$c];
 143                         $p = 1;
 144                 } elseif ($p == 1) {
 145                         if ($unicodeNullByteToggle) {
 146                                 $d = $d . chr(($t << 2) + (($B64Values[$c] & 48) >> 4));
 147                                 $unicodeNullByteToggle = 0;
 148                         } else {
 149                                 $unicodeNullByteToggle = 1;
 150                         }
 151                         $t = ($B64Values[$c] & 15);
 152                         $p = 2;
 153                 } elseif ($p == 2) {
 154                         if ($unicodeNullByteToggle) {
 155                                 $d = $d . chr(($t << 4) + (($B64Values[$c] & 60) >> 2));
 156                                 $unicodeNullByteToggle = 0;
 157                         } else {
 158                                 $unicodeNullByteToggle = 1;
 159                         }
 160                         $t = ($B64Values[$c] & 3);
 161                         $p = 3;
 162                 } elseif ($p == 3) {
 163                         if ($unicodeNullByteToggle) {
 164                                 $d = $d . chr(($t << 6) + $B64Values[$c]);
 165                                 $unicodeNullByteToggle = 0;
 166                         } else {
 167                                 $unicodeNullByteToggle = 1;
 168                         }
 169                         $t = ($B64Values[$c] & 3);
 170                         $p = 0;
 171                 }
 172         }
 173         return $d;
 174 }
 175
 176 ?>