| @@ -1,173 +1,173 @@ | ||
| 1 | -<?php | |
| 2 | - | |
| 3 | -// Do not allow the file to be called directly. | |
| 4 | -if ( ! defined( 'ABSPATH' ) ) { | |
| 5 | - exit; | |
| 6 | -} | |
| 7 | - | |
| 8 | -/** | |
| 9 | - * Encode in Base32 based on RFC 4648. | |
| 10 | - * Requires 20% more space than base64 | |
| 11 | - * Great for case-insensitive filesystems like Windows and URL's (except for = char which can be excluded using the pad option for urls) | |
| 12 | - * | |
| 13 | - * @package default | |
| 14 | - * @author Bryan Ruiz | |
| 15 | - **/ | |
| 16 | -class Base32Static { | |
| 17 | - | |
| 18 | - private static $map = [ | |
| 19 | - 'A', | |
| 20 | - 'B', | |
| 21 | - 'C', | |
| 22 | - 'D', | |
| 23 | - 'E', | |
| 24 | - 'F', | |
| 25 | - 'G', | |
| 26 | - 'H', // 7 | |
| 27 | - 'I', | |
| 28 | - 'J', | |
| 29 | - 'K', | |
| 30 | - 'L', | |
| 31 | - 'M', | |
| 32 | - 'N', | |
| 33 | - 'O', | |
| 34 | - 'P', // 15 | |
| 35 | - 'Q', | |
| 36 | - 'R', | |
| 37 | - 'S', | |
| 38 | - 'T', | |
| 39 | - 'U', | |
| 40 | - 'V', | |
| 41 | - 'W', | |
| 42 | - 'X', // 23 | |
| 43 | - 'Y', | |
| 44 | - 'Z', | |
| 45 | - '2', | |
| 46 | - '3', | |
| 47 | - '4', | |
| 48 | - '5', | |
| 49 | - '6', | |
| 50 | - '7', // 31 | |
| 51 | - '=', // padding character | |
| 52 | - ]; | |
| 53 | - | |
| 54 | - private static $flipped_map = [ | |
| 55 | - 'A' => '0', | |
| 56 | - 'B' => '1', | |
| 57 | - 'C' => '2', | |
| 58 | - 'D' => '3', | |
| 59 | - 'E' => '4', | |
| 60 | - 'F' => '5', | |
| 61 | - 'G' => '6', | |
| 62 | - 'H' => '7', | |
| 63 | - 'I' => '8', | |
| 64 | - 'J' => '9', | |
| 65 | - 'K' => '10', | |
| 66 | - 'L' => '11', | |
| 67 | - 'M' => '12', | |
| 68 | - 'N' => '13', | |
| 69 | - 'O' => '14', | |
| 70 | - 'P' => '15', | |
| 71 | - 'Q' => '16', | |
| 72 | - 'R' => '17', | |
| 73 | - 'S' => '18', | |
| 74 | - 'T' => '19', | |
| 75 | - 'U' => '20', | |
| 76 | - 'V' => '21', | |
| 77 | - 'W' => '22', | |
| 78 | - 'X' => '23', | |
| 79 | - 'Y' => '24', | |
| 80 | - 'Z' => '25', | |
| 81 | - '2' => '26', | |
| 82 | - '3' => '27', | |
| 83 | - '4' => '28', | |
| 84 | - '5' => '29', | |
| 85 | - '6' => '30', | |
| 86 | - '7' => '31', | |
| 87 | - ]; | |
| 88 | - | |
| 89 | - /** | |
| 90 | - * Use padding false when encoding for urls | |
| 91 | - * | |
| 92 | - * @return base32 encoded string | |
| 93 | - * @author Bryan Ruiz | |
| 94 | - **/ | |
| 95 | - public static function encode( $input, $padding = true ) { | |
| 96 | - if ( empty( $input ) ) { | |
| 97 | - return ''; | |
| 98 | - } | |
| 99 | - | |
| 100 | - $input = str_split( $input ); | |
| 101 | - $binary_string = ''; | |
| 102 | - | |
| 103 | - for ( $i = 0; $i < count( $input ); $i++ ) { | |
| 104 | - $binary_string .= str_pad( base_convert( ord( $input[ $i ] ), 10, 2 ), 8, '0', STR_PAD_LEFT ); | |
| 105 | - } | |
| 106 | - | |
| 107 | - $five_bit_binary_array = str_split( $binary_string, 5 ); | |
| 108 | - $base32 = ''; | |
| 109 | - $i = 0; | |
| 110 | - | |
| 111 | - while ( $i < count( $five_bit_binary_array ) ) { | |
| 112 | - $base32 .= self::$map[ base_convert( str_pad( $five_bit_binary_array[ $i ], 5, '0' ), 2, 10 ) ]; | |
| 113 | - $i++; | |
| 114 | - } | |
| 115 | - | |
| 116 | - if ( $padding && ( $x = strlen( $binary_string ) % 40 ) != 0 ) { | |
| 117 | - if ( $x == 8 ) { | |
| 118 | - $base32 .= str_repeat( self::$map[32], 6 ); | |
| 119 | - } elseif ( $x == 16 ) { | |
| 120 | - $base32 .= str_repeat( self::$map[32], 4 ); | |
| 121 | - } elseif ( $x == 24 ) { | |
| 122 | - $base32 .= str_repeat( self::$map[32], 3 ); | |
| 123 | - } elseif ( $x == 32 ) { | |
| 124 | - $base32 .= self::$map[32]; | |
| 125 | - } | |
| 126 | - } | |
| 127 | - | |
| 128 | - return $base32; | |
| 129 | - } | |
| 130 | - | |
| 131 | - public static function decode( $input ) { | |
| 132 | - if ( empty( $input ) ) { | |
| 133 | - return; | |
| 134 | - } | |
| 135 | - | |
| 136 | - $padding_char_count = substr_count( $input, self::$map[32] ); | |
| 137 | - $allowed_values = [ 6, 4, 3, 1, 0 ]; | |
| 138 | - | |
| 139 | - if ( ! in_array( $padding_char_count, $allowed_values ) ) { | |
| 140 | - return false; | |
| 141 | - } | |
| 142 | - | |
| 143 | - for ( $i = 0; $i < 4; $i++ ) { | |
| 144 | - if ( $padding_char_count == $allowed_values[ $i ] && substr( $input, -( $allowed_values[ $i ] ) ) != str_repeat( self::$map[32], $allowed_values[ $i ] ) ) { | |
| 145 | - return false; | |
| 146 | - } | |
| 147 | - } | |
| 148 | - | |
| 149 | - $input = str_replace( '=', '', $input ); | |
| 150 | - $input = str_split( $input ); | |
| 151 | - $binary_string = ''; | |
| 152 | - | |
| 153 | - for ( $i = 0; $i < count( $input ); $i = $i + 8 ) { | |
| 154 | - $x = ''; | |
| 155 | - | |
| 156 | - if ( ! in_array( $input[ $i ], self::$map ) ) { | |
| 157 | - return false; | |
| 158 | - } | |
| 159 | - | |
| 160 | - for ( $j = 0; $j < 8; $j++ ) { | |
| 161 | - $x .= str_pad( base_convert( @self::$flipped_map[ @$input[ $i + $j ] ], 10, 2 ), 5, '0', STR_PAD_LEFT ); | |
| 162 | - } | |
| 163 | - | |
| 164 | - $eight_bits = str_split( $x, 8 ); | |
| 165 | - | |
| 166 | - for ( $z = 0; $z < count( $eight_bits ); $z++ ) { | |
| 167 | - $binary_string .= chr( base_convert( $eight_bits[ $z ], 2, 10 ) ); | |
| 168 | - } | |
| 169 | - } | |
| 170 | - | |
| 171 | - return $binary_string; | |
| 172 | - } | |
| 173 | -} | |
| 1 | +<?php | |
| 2 | + | |
| 3 | +// Do not allow the file to be called directly. | |
| 4 | +if ( ! defined( 'ABSPATH' ) ) { | |
| 5 | + exit; | |
| 6 | +} | |
| 7 | + | |
| 8 | +/** | |
| 9 | + * Encode in Base32 based on RFC 4648. | |
| 10 | + * Requires 20% more space than base64 | |
| 11 | + * Great for case-insensitive filesystems like Windows and URL's (except for = char which can be excluded using the pad option for urls) | |
| 12 | + * | |
| 13 | + * @package default | |
| 14 | + * @author Bryan Ruiz | |
| 15 | + **/ | |
| 16 | +class Base32Static { | |
| 17 | + | |
| 18 | + private static $map = [ | |
| 19 | + 'A', | |
| 20 | + 'B', | |
| 21 | + 'C', | |
| 22 | + 'D', | |
| 23 | + 'E', | |
| 24 | + 'F', | |
| 25 | + 'G', | |
| 26 | + 'H', // 7 | |
| 27 | + 'I', | |
| 28 | + 'J', | |
| 29 | + 'K', | |
| 30 | + 'L', | |
| 31 | + 'M', | |
| 32 | + 'N', | |
| 33 | + 'O', | |
| 34 | + 'P', // 15 | |
| 35 | + 'Q', | |
| 36 | + 'R', | |
| 37 | + 'S', | |
| 38 | + 'T', | |
| 39 | + 'U', | |
| 40 | + 'V', | |
| 41 | + 'W', | |
| 42 | + 'X', // 23 | |
| 43 | + 'Y', | |
| 44 | + 'Z', | |
| 45 | + '2', | |
| 46 | + '3', | |
| 47 | + '4', | |
| 48 | + '5', | |
| 49 | + '6', | |
| 50 | + '7', // 31 | |
| 51 | + '=', // padding character | |
| 52 | + ]; | |
| 53 | + | |
| 54 | + private static $flipped_map = [ | |
| 55 | + 'A' => '0', | |
| 56 | + 'B' => '1', | |
| 57 | + 'C' => '2', | |
| 58 | + 'D' => '3', | |
| 59 | + 'E' => '4', | |
| 60 | + 'F' => '5', | |
| 61 | + 'G' => '6', | |
| 62 | + 'H' => '7', | |
| 63 | + 'I' => '8', | |
| 64 | + 'J' => '9', | |
| 65 | + 'K' => '10', | |
| 66 | + 'L' => '11', | |
| 67 | + 'M' => '12', | |
| 68 | + 'N' => '13', | |
| 69 | + 'O' => '14', | |
| 70 | + 'P' => '15', | |
| 71 | + 'Q' => '16', | |
| 72 | + 'R' => '17', | |
| 73 | + 'S' => '18', | |
| 74 | + 'T' => '19', | |
| 75 | + 'U' => '20', | |
| 76 | + 'V' => '21', | |
| 77 | + 'W' => '22', | |
| 78 | + 'X' => '23', | |
| 79 | + 'Y' => '24', | |
| 80 | + 'Z' => '25', | |
| 81 | + '2' => '26', | |
| 82 | + '3' => '27', | |
| 83 | + '4' => '28', | |
| 84 | + '5' => '29', | |
| 85 | + '6' => '30', | |
| 86 | + '7' => '31', | |
| 87 | + ]; | |
| 88 | + | |
| 89 | + /** | |
| 90 | + * Use padding false when encoding for urls | |
| 91 | + * | |
| 92 | + * @return base32 encoded string | |
| 93 | + * @author Bryan Ruiz | |
| 94 | + **/ | |
| 95 | + public static function encode( $input, $padding = true ) { | |
| 96 | + if ( empty( $input ) ) { | |
| 97 | + return ''; | |
| 98 | + } | |
| 99 | + | |
| 100 | + $input = str_split( $input ); | |
| 101 | + $binary_string = ''; | |
| 102 | + | |
| 103 | + for ( $i = 0; $i < count( $input ); $i++ ) { | |
| 104 | + $binary_string .= str_pad( base_convert( ord( $input[ $i ] ), 10, 2 ), 8, '0', STR_PAD_LEFT ); | |
| 105 | + } | |
| 106 | + | |
| 107 | + $five_bit_binary_array = str_split( $binary_string, 5 ); | |
| 108 | + $base32 = ''; | |
| 109 | + $i = 0; | |
| 110 | + | |
| 111 | + while ( $i < count( $five_bit_binary_array ) ) { | |
| 112 | + $base32 .= self::$map[ base_convert( str_pad( $five_bit_binary_array[ $i ], 5, '0' ), 2, 10 ) ]; | |
| 113 | + $i++; | |
| 114 | + } | |
| 115 | + | |
| 116 | + if ( $padding && ( $x = strlen( $binary_string ) % 40 ) != 0 ) { | |
| 117 | + if ( $x == 8 ) { | |
| 118 | + $base32 .= str_repeat( self::$map[32], 6 ); | |
| 119 | + } elseif ( $x == 16 ) { | |
| 120 | + $base32 .= str_repeat( self::$map[32], 4 ); | |
| 121 | + } elseif ( $x == 24 ) { | |
| 122 | + $base32 .= str_repeat( self::$map[32], 3 ); | |
| 123 | + } elseif ( $x == 32 ) { | |
| 124 | + $base32 .= self::$map[32]; | |
| 125 | + } | |
| 126 | + } | |
| 127 | + | |
| 128 | + return $base32; | |
| 129 | + } | |
| 130 | + | |
| 131 | + public static function decode( $input ) { | |
| 132 | + if ( empty( $input ) ) { | |
| 133 | + return; | |
| 134 | + } | |
| 135 | + | |
| 136 | + $padding_char_count = substr_count( $input, self::$map[32] ); | |
| 137 | + $allowed_values = [ 6, 4, 3, 1, 0 ]; | |
| 138 | + | |
| 139 | + if ( ! in_array( $padding_char_count, $allowed_values ) ) { | |
| 140 | + return false; | |
| 141 | + } | |
| 142 | + | |
| 143 | + for ( $i = 0; $i < 4; $i++ ) { | |
| 144 | + if ( $padding_char_count == $allowed_values[ $i ] && substr( $input, -( $allowed_values[ $i ] ) ) != str_repeat( self::$map[32], $allowed_values[ $i ] ) ) { | |
| 145 | + return false; | |
| 146 | + } | |
| 147 | + } | |
| 148 | + | |
| 149 | + $input = str_replace( '=', '', $input ); | |
| 150 | + $input = str_split( $input ); | |
| 151 | + $binary_string = ''; | |
| 152 | + | |
| 153 | + for ( $i = 0; $i < count( $input ); $i = $i + 8 ) { | |
| 154 | + $x = ''; | |
| 155 | + | |
| 156 | + if ( ! in_array( $input[ $i ], self::$map ) ) { | |
| 157 | + return false; | |
| 158 | + } | |
| 159 | + | |
| 160 | + for ( $j = 0; $j < 8; $j++ ) { | |
| 161 | + $x .= str_pad( base_convert( @self::$flipped_map[ @$input[ $i + $j ] ], 10, 2 ), 5, '0', STR_PAD_LEFT ); | |
| 162 | + } | |
| 163 | + | |
| 164 | + $eight_bits = str_split( $x, 8 ); | |
| 165 | + | |
| 166 | + for ( $z = 0; $z < count( $eight_bits ); $z++ ) { | |
| 167 | + $binary_string .= ( ( $y = chr( base_convert( $eight_bits[ $z ], 2, 10 ) ) ) || ord( $y ) == 48 ) ? $y : ''; | |
| 168 | + } | |
| 169 | + } | |
| 170 | + | |
| 171 | + return $binary_string; | |
| 172 | + } | |
| 173 | +} | |
