| | |
| | | <?php |
| | | // |
| | | // |
| | | // utf7.inc - Routines to encode bytes to UTF7 and decode UTF7 strings |
| | | // |
| | | // Copyright (C) 1999, 2002 Ziberex and Torben Rybner |
| | | // |
| | | // |
| | | // Version 1.01 2002-06-08 19:00 |
| | | // |
| | | // - Adapted for use in IlohaMail (modified UTF-7 decoding) |
| | | // - Converted from C to PHP4 |
| | | // |
| | | // |
| | | // Version 1.00 1999-09-03 19:00 |
| | | // |
| | | // - Encodes bytes to UTF7 strings |
| | | // *OutString = '\0'; |
| | | // StartBase64Encode(); |
| | | // for (CP = InString; *CP; CP++) |
| | | // strcat(OutString, Base64Encode(*CP)); |
| | | // strcat(OutString, StopBase64Encode()); |
| | | // - Decodes Base64 strings to bytes |
| | | // StartBase64Decode(); |
| | | // for (CP1 = InString, CP2 = OutString; *CP1 && (*CP1 != '='); CP1++) |
| | | // CP2 += Base64Decode(*CP1, CP2); |
| | | // StopBase64Decode(); |
| | | // |
| | | |
| | | $BASE64LENGTH = 60; |
| | | |
| | | $BASE64DECODE_NO_DATA = -1; |
| | | $BASE64DECODE_EMPTY_DATA = -2; |
| | | $BASE64DECODE_INVALID_DATA = -3; |
| | | /* |
| | | * Copyright (C) 2000 Edmund Grimley Evans <edmundo@rano.org> |
| | | * |
| | | * This program is free software; you can redistribute it and/or modify |
| | | * it under the terms of the GNU General Public License as published by |
| | | * the Free Software Foundation; either version 2 of the License, or |
| | | * (at your option) any later version. |
| | | * |
| | | * This program is distributed in the hope that it will be useful, |
| | | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| | | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| | | * GNU General Public License for more details. |
| | | * |
| | | * Translated from C to PHP by Thomas Bruederli <roundcube@gmail.com> |
| | | */ |
| | | |
| | | |
| | | // |
| | | // |
| | | // Used for conversion to UTF7 |
| | | // |
| | | $_ToUTF7 = array |
| | | ( |
| | | 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', |
| | | 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', 'a', 'b', 'c', 'd', 'e', 'f', |
| | | 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', |
| | | 'w', 'x', 'y', 'z', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '+', ',' |
| | | ); |
| | | |
| | | // |
| | | // |
| | | // Used for conversion from UTF7 |
| | | // (0x80 => Illegal, 0x40 => CR/LF) |
| | | // |
| | | $_FromUTF7 = array |
| | | ( |
| | | 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, // 00 - 07 - Ctrl - |
| | | 0x80, 0x80, 0x40, 0x80, 0x80, 0x40, 0x80, 0x80, // 08 - 0F - Ctrl - |
| | | 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, // 10 - 17 - Ctrl - |
| | | 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, // 18 - 1F - Ctrl - |
| | | 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, // 20 - 27 !"#$%&' |
| | | 0x80, 0x80, 0x80, 0x3E, 0x3F, 0x80, 0x80, 0x3F, // 28 - 2F ()*+,-./ |
| | | 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3A, 0x3B, // 30 - 37 01234567 |
| | | 0x3C, 0x3D, 0x80, 0x80, 0x80, 0x00, 0x80, 0x80, // 38 - 3F 89:;<=>? |
| | | 0x80, 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, // 40 - 47 @ABCDEFG |
| | | 0x07, 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, // 48 - 4F HIJKLMNO |
| | | 0x0F, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, // 50 - 57 PQRSTUVW |
| | | 0x17, 0x18, 0x19, 0x80, 0x80, 0x80, 0x80, 0x80, // 58 - 5F XYZ[\]^_ |
| | | 0x80, 0x1A, 0x1B, 0x1C, 0x1D, 0x1E, 0x1F, 0x20, // 60 - 67 `abcdefg |
| | | 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28, // 68 - 6F hijklmno |
| | | 0x29, 0x2A, 0x2B, 0x2C, 0x2D, 0x2E, 0x2F, 0x30, // 70 - 77 pqrstuvw |
| | | 0x31, 0x32, 0x33, 0x80, 0x80, 0x80, 0x80, 0x80, // 78 - 7F xyz{|}~ |
| | | ); |
| | | |
| | | |
| | | // |
| | | // |
| | | // UTF7EncodeInit: |
| | | // |
| | | // Start the encoding of bytes |
| | | // |
| | | function UTF7EncodeInit(&$Context) |
| | | /** |
| | | * Convert the data ($str) from RFC 2060's UTF-7 to UTF-8. |
| | | * If input data is invalid, return the original input string. |
| | | * RFC 2060 obviously intends the encoding to be unique (see |
| | | * point 5 in section 5.1.3), so we reject any non-canonical |
| | | * form, such as &ACY- (instead of &-) or &AMA-&AMA- (instead |
| | | * of &AMAAwA-). |
| | | */ |
| | | function utf7_to_utf8($str) |
| | | { |
| | | $Context[ "Data" ] = ""; |
| | | $Context[ "Count" ] = 0; |
| | | $Context[ "Pos" ] = 0; |
| | | $Context[ "State" ] = 0; |
| | | } // UTF7EncodeInit |
| | | $Index_64 = array( |
| | | -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1, |
| | | -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1, |
| | | -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,62, 63,-1,-1,-1, |
| | | 52,53,54,55, 56,57,58,59, 60,61,-1,-1, -1,-1,-1,-1, |
| | | -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,10, 11,12,13,14, |
| | | 15,16,17,18, 19,20,21,22, 23,24,25,-1, -1,-1,-1,-1, |
| | | -1,26,27,28, 29,30,31,32, 33,34,35,36, 37,38,39,40, |
| | | 41,42,43,44, 45,46,47,48, 49,50,51,-1, -1,-1,-1,-1 |
| | | ); |
| | | |
| | | $u7len = strlen($str); |
| | | $str = strval($str); |
| | | $p = $err = ''; |
| | | |
| | | // |
| | | // |
| | | // UTF7EncodeByte: |
| | | // |
| | | // Encodes one byte to UTF7 |
| | | // |
| | | function UTF7EncodeByte(&$Context, $Byte) |
| | | { |
| | | global $_ToUTF7; |
| | | |
| | | $Byte = ord($Byte); |
| | | switch ($Context[ "State" ]) |
| | | for ($i=0; $u7len > 0; $i++, $u7len--) |
| | | { |
| | | case 0: |
| | | // Convert into a byte |
| | | $Context[ "Data" ] = $_ToUTF7[ $Byte >> 2 ]; |
| | | $Context[ "Pos" ]++; |
| | | // Save residue for next converted byte |
| | | $Context[ "Residue" ] = ($Byte & 0x03) << 4; |
| | | // This is the first byte in this line |
| | | $Context[ "Count" ] = 1; |
| | | // Next state is 1 |
| | | $Context[ "State" ] = 1; |
| | | break; |
| | | |
| | | case 1: |
| | | // Convert into a byte |
| | | $Context[ "Data" ] .= $_ToUTF7[ $Context[ "Residue" ] | ($Byte >> 4) ]; |
| | | $Context[ "Pos" ]++; |
| | | // Save residue for next converted byte |
| | | $Context[ "Residue" ] = ($Byte & 0x0F) << 2; |
| | | // Bumb byte counter |
| | | $Context[ "Count" ]++; |
| | | // Next state is 2 |
| | | $Context[ "State" ] = 2; |
| | | break; |
| | | |
| | | case 2: |
| | | // Convert into a byte |
| | | $Context[ "Data" ] .= $_ToUTF7[ $Context[ "Residue" ] | ($Byte >> 6) ]; |
| | | $Context[ "Pos" ]++; |
| | | // Residue fits precisely into the next byte |
| | | $Context[ "Data" ] .= $_ToUTF7[ $Byte & 0x3F ]; |
| | | $Context[ "Pos" ]++; |
| | | // Bumb byte counter |
| | | $Context[ "Count" ]++; |
| | | // Next state is 3 |
| | | $Context[ "State" ] = 3; |
| | | break; |
| | | |
| | | case 3: |
| | | // Convert into a byte |
| | | $Context[ "Data" ] .= $_ToUTF7[ $Byte >> 2 ]; |
| | | $Context[ "Pos" ]++; |
| | | // Save residue for next converted byte |
| | | $Context[ "Residue" ] = ($Byte & 0x03) << 4; |
| | | // Bumb byte counter |
| | | $Context[ "Count" ]++; |
| | | // Next state is 1 |
| | | $Context[ "State" ] = 1; |
| | | break; |
| | | |
| | | default: |
| | | // printf("Internal error in UTF7Encode: State is %d\n", $Context[ "State" ]); |
| | | // exit(1); |
| | | break; |
| | | } |
| | | } // UTF7EncodeByte |
| | | |
| | | |
| | | // |
| | | // |
| | | // UTF7EncodeFinal: |
| | | // |
| | | // Terminates the encoding of bytes |
| | | // |
| | | function UTF7EncodeFinal(&$Context) |
| | | { |
| | | if ($Context[ "State" ] == 0) |
| | | return ""; |
| | | if ($Context[ "State" ] != 3) |
| | | UTF7EncodeByte($Context, "\0"); |
| | | return $Context[ "Data" ]; |
| | | } // UTF7EncodeFinal |
| | | |
| | | |
| | | // |
| | | // |
| | | // UTF7EncodeString |
| | | // |
| | | // Encodes a string to modified UTF-7 format |
| | | // |
| | | function UTF7EncodeString($String) |
| | | { |
| | | // Not during encoding, yet |
| | | $Encoding = false; |
| | | // Go through the string |
| | | for ($I = 0; $I < strlen($String); $I++) |
| | | { |
| | | $Ch = substr($String, $I, 1); |
| | | if (ord($Ch) > 0x7F) |
| | | $u7 = $str[$i]; |
| | | if ($u7 == '&') |
| | | { |
| | | if (! $Encoding) |
| | | $i++; |
| | | $u7len--; |
| | | $u7 = $str[$i]; |
| | | |
| | | if ($u7len && $u7 == '-') |
| | | { |
| | | $RetVal .= "&"; |
| | | $Encoding = true; |
| | | // Initialise UTF7 context |
| | | UTF7EncodeInit($Context); |
| | | $p .= '&'; |
| | | continue; |
| | | } |
| | | UTF7EncodeByte($Context, "\0"); |
| | | UTF7EncodeByte($Context, $Ch); |
| | | |
| | | $ch = 0; |
| | | $k = 10; |
| | | for (; $u7len > 0; $i++, $u7len--) |
| | | { |
| | | $u7 = $str[$i]; |
| | | |
| | | if ((ord($u7) & 0x80) || ($b = $Index_64[ord($u7)]) == -1) |
| | | break; |
| | | |
| | | if ($k > 0) |
| | | { |
| | | $ch |= $b << $k; |
| | | $k -= 6; |
| | | } |
| | | else |
| | | { |
| | | $ch |= $b >> (-$k); |
| | | if ($ch < 0x80) |
| | | { |
| | | /* Printable US-ASCII */ |
| | | if (0x20 <= $ch && $ch < 0x7f) |
| | | return $err; |
| | | $p .= chr($ch); |
| | | } |
| | | else if ($ch < 0x800) |
| | | { |
| | | $p .= chr(0xc0 | ($ch >> 6)); |
| | | $p .= chr(0x80 | ($ch & 0x3f)); |
| | | } |
| | | else |
| | | { |
| | | $p .= chr(0xe0 | ($ch >> 12)); |
| | | $p .= chr(0x80 | (($ch >> 6) & 0x3f)); |
| | | $p .= chr(0x80 | ($ch & 0x3f)); |
| | | } |
| | | |
| | | $ch = ($b << (16 + $k)) & 0xffff; |
| | | $k += 10; |
| | | } |
| | | } |
| | | |
| | | /* Non-zero or too many extra bits */ |
| | | if ($ch || $k < 6) |
| | | return $err; |
| | | |
| | | /* BASE64 not properly terminated */ |
| | | if (!$u7len || $u7 != '-') |
| | | return $err; |
| | | |
| | | /* Adjacent BASE64 sections */ |
| | | if ($u7len > 2 && $str[$i+1] == '&' && $str[$i+2] != '-') |
| | | return $err; |
| | | } |
| | | elseif ($Ch == "&") |
| | | /* Not printable US-ASCII */ |
| | | else if (ord($u7) < 0x20 || ord($u7) >= 0x7f) |
| | | return $err; |
| | | else |
| | | $p .= $u7; |
| | | } |
| | | |
| | | return $p; |
| | | } |
| | | |
| | | |
| | | /** |
| | | * Convert the data ($str) from UTF-8 to RFC 2060's UTF-7. |
| | | * Unicode characters above U+FFFF are replaced by U+FFFE. |
| | | * If input data is invalid, return an empty string. |
| | | */ |
| | | function utf8_to_utf7($str) |
| | | { |
| | | $B64Chars = array( |
| | | 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', |
| | | 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', 'a', 'b', 'c', 'd', |
| | | 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', |
| | | 't', 'u', 'v', 'w', 'x', 'y', 'z', '0', '1', '2', '3', '4', '5', '6', '7', |
| | | '8', '9', '+', ',' |
| | | ); |
| | | |
| | | $u8len = strlen($str); |
| | | $base64 = $i = 0; |
| | | $p = $err = ''; |
| | | |
| | | while ($u8len) |
| | | { |
| | | $u8 = $str[$i]; |
| | | $c = ord($u8); |
| | | |
| | | if ($c < 0x80) |
| | | { |
| | | if (! $Encoding) |
| | | $ch = $c; |
| | | $n = 0; |
| | | } |
| | | else if ($c < 0xc2) |
| | | return $err; |
| | | else if ($c < 0xe0) |
| | | { |
| | | $ch = $c & 0x1f; |
| | | $n = 1; |
| | | } |
| | | else if ($c < 0xf0) |
| | | { |
| | | $ch = $c & 0x0f; |
| | | $n = 2; |
| | | } |
| | | else if ($c < 0xf8) |
| | | { |
| | | $ch = $c & 0x07; |
| | | $n = 3; |
| | | } |
| | | else if ($c < 0xfc) |
| | | { |
| | | $ch = $c & 0x03; |
| | | $n = 4; |
| | | } |
| | | else if ($c < 0xfe) |
| | | { |
| | | $ch = $c & 0x01; |
| | | $n = 5; |
| | | } |
| | | else |
| | | return $err; |
| | | |
| | | $i++; |
| | | $u8len--; |
| | | |
| | | if ($n > $u8len) |
| | | return $err; |
| | | |
| | | for ($j=0; $j < $n; $j++) |
| | | { |
| | | $o = ord($str[$i+$j]); |
| | | if (($o & 0xc0) != 0x80) |
| | | return $err; |
| | | $ch = ($ch << 6) | ($o & 0x3f); |
| | | } |
| | | |
| | | if ($n > 1 && !($ch >> ($n * 5 + 1))) |
| | | return $err; |
| | | |
| | | $i += $n; |
| | | $u8len -= $n; |
| | | |
| | | if ($ch < 0x20 || $ch >= 0x7f) |
| | | { |
| | | if (!$base64) |
| | | { |
| | | $RetVal .= "&"; |
| | | $Encoding = true; |
| | | // Initialise UTF7 context |
| | | UTF7EncodeInit($Context); |
| | | $p .= '&'; |
| | | $base64 = 1; |
| | | $b = 0; |
| | | $k = 10; |
| | | } |
| | | else |
| | | { |
| | | UTF7EncodeByte($Context, "\0"); |
| | | UTF7EncodeByte($Context, $Ch); |
| | | } |
| | | if ($ch & ~0xffff) |
| | | $ch = 0xfffe; |
| | | |
| | | $p .= $B64Chars[($b | $ch >> $k)]; |
| | | $k -= 6; |
| | | for (; $k >= 0; $k -= 6) |
| | | $p .= $B64Chars[(($ch >> $k) & 0x3f)]; |
| | | |
| | | $b = ($ch << (-$k)) & 0x3f; |
| | | $k += 16; |
| | | } |
| | | else |
| | | { |
| | | if ($Encoding) |
| | | if ($base64) |
| | | { |
| | | $RetVal .= UTF7EncodeFinal($Context) . "-$Ch"; |
| | | $Encoding = false; |
| | | if ($k > 10) |
| | | $p .= $B64Chars[$b]; |
| | | $p .= '-'; |
| | | $base64 = 0; |
| | | } |
| | | else |
| | | $RetVal .= $Ch; |
| | | |
| | | $p .= chr($ch); |
| | | if (chr($ch) == '&') |
| | | $p .= '-'; |
| | | } |
| | | } |
| | | if ($Encoding) |
| | | $RetVal .= UTF7EncodeFinal($Context) . "-"; |
| | | return $RetVal; |
| | | } // UTF7EncodeString |
| | | |
| | | |
| | | // |
| | | // |
| | | // UTF7DecodeInit: |
| | | // |
| | | // Start the decoding of bytes |
| | | // |
| | | function UTF7DecodeInit(&$Context) |
| | | { |
| | | $Context[ "Data" ] = ""; |
| | | $Context[ "State" ] = 0; |
| | | $Context[ "Pos" ] = 0; |
| | | } // UTF7DecodeInit |
| | | |
| | | |
| | | // |
| | | // |
| | | // UTF7DecodeByte: |
| | | // |
| | | // Decodes one character from UTF7 |
| | | // |
| | | function UTF7DecodeByte(&$Context, $Byte) |
| | | { |
| | | global $BASE64DECODE_INVALID_DATA; |
| | | global $_FromUTF7; |
| | | |
| | | // Restore bits |
| | | $Byte = $_FromUTF7[ ord($Byte) ]; |
| | | // Ignore carriage returns and linefeeds |
| | | if ($Byte == 0x40) |
| | | return ""; |
| | | // Invalid byte - Tell caller! |
| | | if ($Byte == 0x80) |
| | | $Context[ "Count" ] = $BASE64DECODE_INVALID_DATA; |
| | | switch ($Context[ "State" ]) |
| | | if ($base64) |
| | | { |
| | | case 0: |
| | | // Save residue |
| | | $Context[ "Residue" ] = $Byte; |
| | | // Initialise count |
| | | $Context[ "Count" ] = 0; |
| | | // Next state |
| | | $Context[ "State" ] = 1; |
| | | break; |
| | | |
| | | case 1: |
| | | // Store byte |
| | | $Context[ "Data" ] .= chr(($Context[ "Residue" ] << 2) | ($Byte >> 4)); |
| | | $Context[ "Pos" ]++; |
| | | // Update count |
| | | $Context[ "Count" ]++; |
| | | // Save residue |
| | | $Context[ "Residue" ] = $Byte; |
| | | // Next state |
| | | $Context[ "State" ] = 2; |
| | | break; |
| | | |
| | | case 2: |
| | | // Store byte |
| | | $Context[ "Data" ] .= chr(($Context[ "Residue" ] << 4) | ($Byte >> 2)); |
| | | $Context[ "Pos" ]++; |
| | | // Update count |
| | | $Context[ "Count" ]++; |
| | | // Save residue |
| | | $Context[ "Residue" ] = $Byte; |
| | | // Next state |
| | | $Context[ "State" ] = 3; |
| | | break; |
| | | |
| | | case 3: |
| | | // Store byte |
| | | $Context[ "Data" ] .= chr(($Context[ "Residue" ] << 6) | $Byte); |
| | | $Context[ "Pos" ]++; |
| | | // Update count |
| | | $Context[ "Count" ]++; |
| | | // Next state |
| | | $Context[ "State" ] = 4; |
| | | break; |
| | | |
| | | case 4: |
| | | // Save residue |
| | | $Context[ "Residue" ] = $Byte; |
| | | // Next state |
| | | $Context[ "State" ] = 1; |
| | | break; |
| | | if ($k > 10) |
| | | $p .= $B64Chars[$b]; |
| | | $p .= '-'; |
| | | } |
| | | } // UTF7DecodeByte |
| | | |
| | | return $p; |
| | | } |
| | | |
| | | // |
| | | // |
| | | // UTF7DecodeFinal: |
| | | // |
| | | // Decodes one character from UTF7 |
| | | // |
| | | function UTF7DecodeFinal(&$Context) |
| | | { |
| | | // Buffer not empty - Return remainder! |
| | | if ($Context[ "Count" ]) |
| | | { |
| | | $Context[ "Pos" ] = 0; |
| | | $Context[ "State" ] = 0; |
| | | return $Context[ "Data" ]; |
| | | } |
| | | return ""; |
| | | } // UTF7DecodeFinal |
| | | |
| | | |
| | | // |
| | | // |
| | | // UTF7DecodeString |
| | | // |
| | | // Converts a string encoded in modified UTF-7 encoding |
| | | // to ISO 8859-1. |
| | | // OBS: Works only for valid ISO 8859-1 characters in the |
| | | // encoded data |
| | | // |
| | | function UTF7DecodeString($String) |
| | | { |
| | | $Decoding = false; |
| | | for ($I = 0; $I < strlen($String); $I++) |
| | | { |
| | | $Ch = substr($String, $I, 1); |
| | | if ($Decoding) |
| | | { |
| | | if ($Ch == "-") |
| | | { |
| | | $RetVal .= UTF7DecodeFinal($Context); |
| | | $Decoding = false; |
| | | } |
| | | else |
| | | UTF7DecodeByte($Context, $Ch); |
| | | } |
| | | elseif ($Ch == "&") |
| | | { |
| | | if (($I < strlen($String) - 1) && (substr($String, $I + 1, 1) == "-")) |
| | | { |
| | | $RetVal .= $Ch; |
| | | $I++; |
| | | } |
| | | else |
| | | { |
| | | UTF7DecodeInit($Context); |
| | | $Decoding = true; |
| | | } |
| | | } |
| | | else |
| | | $RetVal .= $Ch; |
| | | } |
| | | return str_replace("\0", "", $RetVal); |
| | | } // UTF7DecodeString |
| | | ?> |