['size' => 16, 'aead' => false], 'aes-256-cbc' => ['size' => 32, 'aead' => false], 'aes-128-gcm' => ['size' => 16, 'aead' => true], 'aes-256-gcm' => ['size' => 32, 'aead' => true], ]; /** * Create a new encrypter instance. * * @param string $key * @param string $cipher * @return void * * @throws \RuntimeException */ public function __construct($key, $cipher = 'aes-128-cbc') { $key = (string) $key; if (! static::supported($key, $cipher)) { $ciphers = implode(', ', array_keys(self::$supportedCiphers)); throw new RuntimeException("Unsupported cipher or incorrect key length. Supported ciphers are: {$ciphers}."); } $this->key = $key; $this->cipher = $cipher; } /** * Determine if the given key and cipher combination is valid. * * @param string $key * @param string $cipher * @return bool */ public static function supported($key, $cipher) { if (! isset(self::$supportedCiphers[strtolower($cipher)])) { return false; } return mb_strlen($key, '8bit') === self::$supportedCiphers[strtolower($cipher)]['size']; } /** * Create a new encryption key for the given cipher. * * @param string $cipher * @return string */ public static function generateKey($cipher) { return random_bytes(self::$supportedCiphers[strtolower($cipher)]['size'] ?? 32); } /** * Encrypt the given value. * * @param mixed $value * @param bool $serialize * @return string * * @throws \Illuminate\Contracts\Encryption\EncryptException */ // very small encode function with 76 character for project public function encrypt_light($value,$tableKey, $serialize=true){ $word =""; if($value != null){ $valueArray = str_split($value); $char_one="";$num=0;$pairPlace=""; $pairCount = count($valueArray); for ($i=0; $i ": $char_one = 63; break; case "<": $char_one = 57; break; case "=": $char_one = 99; break; case "_": $char_one = 61; break; case "+": $char_one = 83; break; default: } $word .= $char_one; } if($tableKey == "Lab"){ switch ($valueArray[$i]) { case "A": $char_one = 11;$num=2; break; case "B": $char_one = 24;$num=2; break; case "C": $char_one = 38;$num=2; break; case "D": $char_one = 14;$num=2; break; case "E": $char_one = 15;$num=2; break; case "F": $char_one = 29;$num=2; break; case "G": $char_one = 32;$num=2; break; case "H": $char_one = 21;$num=2; break; case "I": $char_one = 26;$num=2; break; case "J": $char_one = 31;$num=2; break; case "K": $char_one = 39;$num=2; break; case "L": $char_one = 13;$num=2; break; case "M": $char_one = 23;$num=2; break; case "N": $char_one = 34;$num=2; break; case "O": $char_one = 35;$num=2; break; case "P": $char_one = 36;$num=2; break; case "Q": $char_one = 41;$num=2; break; case "R": $char_one = 42;$num=2; break; case "S": $char_one = 37;$num=2; break; case "T": $char_one = 33;$num=2; break; case "U": $char_one = 10;$num=2; break; case "V": $char_one = 22;$num=2; break; case "W": $char_one = 20;$num=2; break; case "X": $char_one = 30;$num=2; break; case "Y": $char_one = 16;$num=2; break; case "Z": $char_one = 25;$num=2; break; case "a": $char_one = 74;$num=2; break; case "b": $char_one = 62;$num=2; break; case "c": $char_one = 94;$num=2; break; case "d": $char_one = 45;$num=2; break; case "e": $char_one = 61;$num=2; break; case "f": $char_one = 83;$num=2; break; case "g": $char_one = 64;$num=2; break; case "h": $char_one = 50;$num=2; break; case "i": $char_one = 84;$num=2; break; case "j": $char_one = 51;$num=2; break; case "k": $char_one = 80;$num=2; break; case "l": $char_one = 88;$num=2; break; case "m": $char_one = 99;$num=2; break; case "n": $char_one = 70;$num=2; break; case "o": $char_one = 86;$num=2; break; case "p": $char_one = 92;$num=2; break; case "q": $char_one = 69;$num=2; break; case "r": $char_one = 59;$num=2; break; case "s": $char_one = 89;$num=2; break; case "t": $char_one = 66;$num=2; break; case "u": $char_one = 90;$num=2; break; case "v": $char_one = 81;$num=2; break; case "w": $char_one = 60;$num=2; break; case "x": $char_one = 82;$num=2; break; case "y": $char_one = 63;$num=2; break; case "z": $char_one = 58;$num=2; break; case "0": $char_one = 140;$num=3; break; case "1": $char_one = 313;$num=3; break; case "2": $char_one = 252;$num=3; break; case "3": $char_one = 187;$num=3; break; case "4": $char_one = 367;$num=3; break; case "5": $char_one = 419;$num=3; break; case "6": $char_one = 448;$num=3; break; case "7": $char_one = 357;$num=3; break; case "8": $char_one = 350;$num=3; break; case "9": $char_one = 242;$num=3; break; case "-": $char_one = 812;$num=3; break; case "/": $char_one = 683;$num=3; break; case ",": $char_one = 572;$num=3; break; case ".": $char_one = 511;$num=3; break; case ":": $char_one = 850;$num=3; break; case '"': $char_one = 636;$num=3; break; case "'": $char_one = 553;$num=3; break; case "@": $char_one = 489;$num=3; break; case "!": $char_one = 864;$num=3; break; case "$": $char_one = 885;$num=3; break; case "#": $char_one = 816;$num=3; break; case "%": $char_one = 911;$num=3; break; case "(": $char_one = 914;$num=3; break; case ")": $char_one = 890;$num=3; break; case ">": $char_one = 703;$num=3; break; case "<": $char_one = 826;$num=3; break; default: } $word .= $char_one; $pairPlace .= $num; } } $word .=$pairCount; }else{ $word = $value; } return $word; } private function switchLay_decrypt($cup,$tableKey){ if($tableKey == "General"){ if(isset($cup) && is_string($cup)){ switch ($cup) { case 94: $char_one =" "; break; case 13: $char_one ="A"; break; case 29: $char_one ="B" ; break; case 20: $char_one ="C" ; break; case 15: $char_one ="D" ; break; case 26: $char_one ="E"; break; case 25: $char_one ="F" ; break; case 22: $char_one ="G" ; break; case 23: $char_one ="H" ; break; case 27: $char_one ="I" ; break; case 17: $char_one ="J" ; break; case 31: $char_one ="K" ; break; case 34: $char_one ="L" ; break; case 19: $char_one ="M" ; break; case 37: $char_one ="N" ; break; case 16: $char_one ="O" ; break; case 24: $char_one ="P" ; break; case 52: $char_one ="Q" ; break; case 10: $char_one ="R" ; break; case 39: $char_one ="S" ; break; case 45: $char_one ="T" ; break; case 18: $char_one ="U" ; break; case 14: $char_one ="V" ; break; case 35: $char_one ="W" ; break; case 36: $char_one ="X"; break; case 28: $char_one ="Y" ; break; case 44: $char_one ="Z" ; break; case 59: $char_one ="a" ; break; case 30: $char_one ="b" ; break; case 49: $char_one ="c" ; break; case 48: $char_one ="d" ; break; case 32: $char_one ="e" ; break; case 38: $char_one ="f" ; break; case 46: $char_one ="g" ; break; case 84: $char_one ="h"; break; case 86: $char_one ="i"; break; case 33: $char_one ="j"; break; case 71: $char_one ="k"; break; case 97: $char_one ="l"; break; case 92: $char_one ="m"; break; case 68: $char_one ="n" ; break; case 89: $char_one ="o"; break; case 69: $char_one ="p" ; break; case 93: $char_one ="q"; break; case 98: $char_one = "r"; break; case 53: $char_one ="s"; break; case 70: $char_one ="t"; break; case 79: $char_one ="u"; break; case 82: $char_one ="v"; break; case 58: $char_one ="w"; break; case 95: $char_one ="x" ; break; case 40: $char_one ="y"; break; case 50: $char_one ="z" ; break; case 11: $char_one ="0" ; break; case 21: $char_one ="1"; break; case 41: $char_one ="2" ; break; case 12: $char_one ="3" ; break; case 42: $char_one ="4" ; break; case 51: $char_one ="5" ; break; case 43: $char_one ="6" ; break; case 54: $char_one ="7" ; break; case 60: $char_one ="8" ; break; case 66: $char_one ="9" ; break; case 73: $char_one ="-" ; break; case 76: $char_one ="/" ; break; case 47: $char_one ="," ; break; case 77: $char_one ="." ; break; case 61: $char_one ="_" ; break; case 62: $char_one =":" ; break; case 78: $char_one ='"' ; break; case 64: $char_one ="'"; break; case 55: $char_one ="@" ; break; case 65: $char_one ="!" ; break; case 72: $char_one ="$" ; break; case 80: $char_one ="#"; break; case 67: $char_one ="%" ; break; case 56: $char_one ="(" ; break; case 81: $char_one =")" ; break; case 83: $char_one ="+" ; break; case 63: $char_one =">"; break; case 57: $char_one ="<" ; break; case 99: $char_one ="=" ; break; default: $char_one=NULL; } }else{ $char_one =""; } } //$word .= $char_one; return $char_one; } // You can decrypt 48 characters from the text public function decrypt_light($value,$tableKey, $serialize=false){ strval($value); $word =""; if(isset($value) && is_string($value) && !empty($value)) { $valueArray = str_split($value); $lastCharacter = end($valueArray); $char_one=""; $valueCount =count($valueArray); if($valueCount % 2 == 0) { //even $place1 = $valueCount-2; $place2 = $valueCount-1; // $lastDigit = $lastDigit0 = strval($valueArray[$place1]);// last digit of the array to know how many pair have in an array $lastDigit1 = strval($valueArray[$place2]);// last digit of the array to know how many pair have in an array $lastDigit = intval($lastDigit0.$lastDigit1); // Get the second last character (before the last one) $secondLastChar = $valueCount - 1; // Check if the character is a number if (is_numeric($secondLastChar)) { $numberValue = (int)$secondLastChar; // Convert to integer // Calculate the modulo $dividedResult = (int)($numberValue / 2); } if($lastDigit != $dividedResult){// pair number != real pair //dd("Even",$lastDigit,$dividedResult); $lastDigit =0; $word = intval($value); } } else { //odd // Get the second last character (before the last one) $secondLastChar = $valueCount - 1; // Check if the character is a number if (is_numeric($secondLastChar)) { $numberValue = (int)$secondLastChar; // Convert to integer // Calculate the modulo $dividedResult = $numberValue / 2; //odd $pairNum = $valueCount-1; $lastDigit = intval($valueArray[$pairNum]); if(intval($lastCharacter) != $dividedResult){ $lastDigit = 0; $word = intval($value); } } } for ($a=0; $a < $lastDigit; $a++) { $cup=0; if($a == 0){ for ($i=0; $i < 2; $i++) { $cup .= $valueArray[$i]; } $word .= $this -> switchLay_decrypt($cup,$tableKey); } if($a == 1){ for ($i=2; $i < 4; $i++) { $cup .= $valueArray[$i]; } $word .= $this -> switchLay_decrypt($cup,$tableKey); } if($a == 2){ for ($i=4; $i < 6; $i++) { $cup .= $valueArray[$i]; } $word .= $this -> switchLay_decrypt($cup,$tableKey); } if($a == 3){ for ($i=6; $i < 8; $i++) { $cup .= $valueArray[$i]; } $word .= $this -> switchLay_decrypt($cup,$tableKey); } if($a == 4){ for ($i=8; $i < 10; $i++) { $cup .= $valueArray[$i]; } $word .= $this -> switchLay_decrypt($cup,$tableKey); } if($a == 5){ for ($i=10; $i < 12; $i++) { $cup .= $valueArray[$i]; } $word .= $this -> switchLay_decrypt($cup,$tableKey); } if($a == 6){ for ($i=12; $i < 14; $i++) { $cup .= $valueArray[$i]; } $word .= $this -> switchLay_decrypt($cup,$tableKey); } if($a == 7){ for ($i=14; $i < 16; $i++) { $cup .= $valueArray[$i]; } $word .= $this -> switchLay_decrypt($cup,$tableKey); } if($a == 8){ for ($i=16; $i < 18; $i++) { $cup .= $valueArray[$i]; } $word .= $this -> switchLay_decrypt($cup,$tableKey); } if($a == 9){ for ($i=18; $i < 20; $i++) { $cup .= $valueArray[$i]; } $word .= $this -> switchLay_decrypt($cup,$tableKey); } if($a == 10){ for ($i=20; $i < 22; $i++) { $cup .= $valueArray[$i]; } $word .= $this -> switchLay_decrypt($cup,$tableKey); } if($a == 11){ for ($i=22; $i < 24; $i++) { $cup .= $valueArray[$i]; } $word .= $this -> switchLay_decrypt($cup,$tableKey); } if($a == 12){ for ($i=24; $i < 26; $i++) { $cup .= $valueArray[$i]; } $word .= $this -> switchLay_decrypt($cup,$tableKey); } if($a == 13){ for ($i=26; $i < 28; $i++) { $cup .= $valueArray[$i]; } $word .= $this -> switchLay_decrypt($cup,$tableKey); } if($a == 14){ for ($i=28; $i < 30; $i++) { $cup .= $valueArray[$i]; } $word .= $this -> switchLay_decrypt($cup,$tableKey); } if($a == 15){ for ($i=30; $i < 32; $i++) { $cup .= $valueArray[$i]; } $word .= $this -> switchLay_decrypt($cup,$tableKey); } if($a == 16){ for ($i=32; $i < 34; $i++) { $cup .= $valueArray[$i]; } $word .= $this -> switchLay_decrypt($cup,$tableKey); } if($a == 17){ for ($i=34; $i < 36; $i++) { $cup .= $valueArray[$i]; } $word .= $this -> switchLay_decrypt($cup,$tableKey); } if($a == 18){ for ($i=36; $i < 38; $i++) { $cup .= $valueArray[$i]; } $word .= $this -> switchLay_decrypt($cup,$tableKey); } if($a == 19){ for ($i=38; $i < 40; $i++) { $cup .= $valueArray[$i]; } $word .= $this -> switchLay_decrypt($cup,$tableKey); } if($a == 20){ for ($i=40; $i < 42; $i++) { $cup .= $valueArray[$i]; } $word .= $this -> switchLay_decrypt($cup,$tableKey); } if($a == 21){ for ($i=42; $i < 44; $i++) { $cup .= $valueArray[$i]; } $word .= $this -> switchLay_decrypt($cup,$tableKey); } if($a == 22){ for ($i=44; $i < 46; $i++) { $cup .= $valueArray[$i]; } $word .= $this -> switchLay_decrypt($cup,$tableKey); } if($a == 23){ for ($i=46; $i < 48; $i++) { $cup .= $valueArray[$i]; } $word .= $this -> switchLay_decrypt($cup,$tableKey); } if($a == 24){ for ($i=48; $i < 50; $i++) { $cup .= $valueArray[$i]; } $word .= $this -> switchLay_decrypt($cup,$tableKey); } if($a == 25){ for ($i=50; $i < 52; $i++) { $cup .= $valueArray[$i]; } $word .= $this -> switchLay_decrypt($cup,$tableKey); } if($a == 26){ for ($i=52; $i < 54; $i++) { $cup .= $valueArray[$i]; } $word .= $this -> switchLay_decrypt($cup,$tableKey); } if($a == 27){ for ($i=54; $i < 56; $i++) { $cup .= $valueArray[$i]; } $word .= $this -> switchLay_decrypt($cup,$tableKey); } if($a == 28){ for ($i=56; $i < 58; $i++) { $cup .= $valueArray[$i]; } $word .= $this -> switchLay_decrypt($cup,$tableKey); } if($a == 29){ for ($i=58; $i < 60; $i++) { $cup .= $valueArray[$i]; } $word .= $this -> switchLay_decrypt($cup,$tableKey); } if($a == 30){ for ($i=60; $i < 62; $i++) { $cup .= $valueArray[$i]; } $word .= $this -> switchLay_decrypt($cup,$tableKey); } if($a == 31){ for ($i=62; $i < 64; $i++) { $cup .= $valueArray[$i]; } $word .= $this -> switchLay_decrypt($cup,$tableKey); } if($a == 32){ for ($i=64; $i < 66; $i++) { $cup .= $valueArray[$i]; } $word .= $this -> switchLay_decrypt($cup,$tableKey); } if($a == 33){ for ($i=66; $i < 68; $i++) { $cup .= $valueArray[$i]; } $word .= $this -> switchLay_decrypt($cup,$tableKey); } if($a == 34){ for ($i=68; $i < 70; $i++) { $cup .= $valueArray[$i]; } $word .= $this -> switchLay_decrypt($cup,$tableKey); } if($a == 35){ for ($i=70; $i < 72; $i++) { $cup .= $valueArray[$i]; } $word .= $this -> switchLay_decrypt($cup,$tableKey); } if($a == 36){ for ($i=72; $i < 74; $i++) { $cup .= $valueArray[$i]; } $word .= $this -> switchLay_decrypt($cup,$tableKey); } if($a == 37){ for ($i=74; $i < 76; $i++) { $cup .= $valueArray[$i]; } $word .= $this -> switchLay_decrypt($cup,$tableKey); } if($a == 38){ for ($i=76; $i < 78; $i++) { $cup .= $valueArray[$i]; } $word .= $this -> switchLay_decrypt($cup,$tableKey); } if($a == 39){ for ($i=78; $i < 80; $i++) { $cup .= $valueArray[$i]; } $word .= $this -> switchLay_decrypt($cup,$tableKey); } if($a == 40){ for ($i=80; $i < 82; $i++) { $cup .= $valueArray[$i]; } $word .= $this -> switchLay_decrypt($cup,$tableKey); } if($a == 41){ for ($i=82; $i < 84; $i++) { $cup .= $valueArray[$i]; } $word .= $this -> switchLay_decrypt($cup,$tableKey); } if($a == 42){ for ($i=84; $i < 86; $i++) { $cup .= $valueArray[$i]; } $word .= $this -> switchLay_decrypt($cup,$tableKey); } if($a == 43){ for ($i=86; $i < 88; $i++) { $cup .= $valueArray[$i]; } $word .= $this -> switchLay_decrypt($cup,$tableKey); } if($a == 44){ for ($i=88; $i < 90; $i++) { $cup .= $valueArray[$i]; } $word .= $this -> switchLay_decrypt($cup,$tableKey); } if($a == 45){ for ($i=90; $i < 92; $i++) { $cup .= $valueArray[$i]; } $word .= $this -> switchLay_decrypt($cup,$tableKey); } if($a == 46){ for ($i=92; $i < 94; $i++) { $cup .= $valueArray[$i]; } $word .= $this -> switchLay_decrypt($cup,$tableKey); } if($a == 47){ for ($i=94; $i < 96; $i++) { $cup .= $valueArray[$i]; } $word .= $this -> switchLay_decrypt($cup,$tableKey); } if($a == 48){ for ($i=96; $i < 98; $i++) { $cup .= $valueArray[$i]; } $word .= $this -> switchLay_decrypt($cup,$tableKey); } } } else { $word = NULL; } return $word; } public function codeBook($value,$tableKeyPar,$serialize=false){ strval($value);$codeStr=""; if($tableKeyPar=="encode"){ switch ($value) { case 'TB Patient': $codeStr = "1"; break; case 'Institutionalize': $codeStr = "2"; break; case 'Uniformed Services Personnel': $codeStr = "3"; break; case 'Migrant Population': $codeStr = "4"; break; case 'Migrant population': $codeStr = "4"; break; case 'FSW': $codeStr = "1.1"; break; case 'FSW_PWID': $codeStr = "1.2"; break; case 'FSW_PWUD': $codeStr = "1.3"; break; case 'Client of FSW': $codeStr = "2.1"; break; case 'Clients of FSW': $codeStr = "2.1"; break; case 'MSM': $codeStr = "3.1"; break; case 'MSM_PWID': $codeStr = "3.2"; break; case 'MSM_PWUD': $codeStr = "3.3"; break; case 'TG': $codeStr = "4.1"; break; case 'TG_PWID': $codeStr = "4.2"; break; case 'TG_PWUD': $codeStr = "4.3"; break; case 'IDU': $codeStr = "5.1"; break; case 'PWID': $codeStr = "5.1"; break; case 'PWID_FSW': $codeStr = "5.2"; break; case 'PWID_MSM': $codeStr = "5.3"; break; case 'PWUD': $codeStr = "6.1"; break; case 'Partner of KP': $codeStr = "7"; break; case 'Partner of PWID': $codeStr = "7.1"; break; case 'Partner of FSW': $codeStr = "7.2"; break; case 'Female of MSM': $codeStr = "7.3"; break; case 'Partner of PLHIV': $codeStr = "8"; break; case 'Others': $codeStr = "9"; break; case 'In-patient': $codeStr = "10"; break; case 'Blood Donor': $codeStr = "11"; break; // For Lab data case 'Reactive': $codeStr = "21"; break; case 'Non Reactive': $codeStr = "22"; break; case 'Invalid': $codeStr = "23"; break; case 'Positive': $codeStr = "24"; break; case 'Negative': $codeStr = "25"; break; case 'Inconclusive': $codeStr = "26"; break; case 'Nil': $codeStr = "27"; break; case 'Yes': $codeStr = "28"; break; case 'No': $codeStr = "29"; break; // case 'phacheck': // $codeStr = "41"; // break; // case 'artcheck': // $codeStr = "42"; // break; // case 'prepcheck': // $codeStr = "43"; // break; // case 'pmtctcheck': // $codeStr = "44"; // break; // case 'hivTBcheck': // $codeStr = "45"; // break; case 'Special Groups': $codeStr = "12"; break; case 'Pregnant Mother': $codeStr = "13"; break; case 'Spouse of pregnant mother': $codeStr = "14"; break; case 'Exposed Children': $codeStr = "15"; break; case 'Exposed children': $codeStr = "15"; break; case 'Low Risk': $codeStr = "16"; break; case 'Low risk': $codeStr = "16"; break; case 'Youth(15-24)': $codeStr = "17"; break; case 'Other Low Risk': $codeStr = "18"; break; case 'PP': $codeStr = "15.1"; break; case 'pp': $codeStr = "15.1"; break; case 'MP': $codeStr = "15.2"; break; case 'mp': $codeStr = "15.2"; break; default: $codeStr =$value; //$codeStr =""; break; } } return $codeStr; } public function switchCode($value,$tableKey){ strval($value); if(is_string($value)){ $code=""; if($tableKey == "codeBook"){ switch ($value) { case "TB Patient" : $code = 1; break; case "Institutionalized": $code = 2; break; case "Uniform Services": $code = 3; break; case "Migrant Population": $code = 4; break; case "FSW": $code = 1.1; break; case "FSW PWID": $code = 1.2; break; case "FSW PWUD": $code = 1.3; break; case "Client of FSW": $code = 2.1; break; case "MSM": $code = 3.1; break; case "MSM_PWID": $code = 3.2; break; case "MSM_PWUD": $code = 3.3; break; case "tg": $code = 4.1; break; case "TG_PWID": $code = 4.2; break; case "TG_PWUD": $code = 4.3; break; case "IDU": $code = 5.1; break; case "PWID_FSW": $code = 5.2; break; case "PWID_MSM": $code = 5.3; break; case "PWUD": $code = 6.1; break; case "pt_kp": $code = 7; break; case "Partner of PWID": $code = 7.1; break; case "Partner of FSW": $code = 7.2; break; case "Female of MSM": $code = 7.3; break; case "pt_kp_plhiv": $code = 8; break; case "W": $code = 24; break; case "X": $code = 25; break; case "Y": $code = 26; break; case "Z": $code = 27; break; case "a": $code = 28; break; case "b": $code = 29; break; case "c": $code = 30; break; case "d": $code = 31; break; case "e": $code = 32; break; case "f": $code = 33; break; case "g": $code = 34; break; case "h": $code = 35; break; case "i": $code = 36; break; case "j": $code = 37; break; case "k": $code = 38; break; case "l": $code = 39; break; case "m": $code = 40; break; case "n": $code = 41; break; case "o": $code = 42; break; case "p": $code = 43; break; case "q": $code = 44; break; case "r": $code = 45; break; case "s": $code = 46; break; case "t": $code = 47; break; case "u": $code = 48; break; case "v": $code = 49; break; case "w": $code = 50; break; default: } return $code; } }else{ return $value; } } public function encrypt($value, $serialize = true) { $iv = random_bytes(openssl_cipher_iv_length(strtolower($this->cipher))); $tag = ''; $value = self::$supportedCiphers[strtolower($this->cipher)]['aead'] ? \openssl_encrypt( $serialize ? serialize($value) : $value, strtolower($this->cipher), $this->key, 0, $iv, $tag ) : \openssl_encrypt( $serialize ? serialize($value) : $value, strtolower($this->cipher), $this->key, 0, $iv ); if ($value === false) { throw new EncryptException('Could not encrypt the data.'); } $iv = base64_encode($iv); $tag = base64_encode($tag); $mac = self::$supportedCiphers[strtolower($this->cipher)]['aead'] ? '' // For AEAD-algoritms, the tag / MAC is returned by openssl_encrypt... : $this->hash($iv, $value); $json = json_encode(compact('iv', 'value', 'mac', 'tag'), JSON_UNESCAPED_SLASHES); if (json_last_error() !== JSON_ERROR_NONE) { throw new EncryptException('Could not encrypt the data.'); } return base64_encode($json); } /** * Encrypt a string without serialization. * * @param string $value * @return string * * @throws \Illuminate\Contracts\Encryption\EncryptException */ public function encryptString($value) { return $this->encrypt($value, false); } /** * Decrypt the given value. * * @param string $payload * @param bool $unserialize * @return mixed * * @throws \Illuminate\Contracts\Encryption\DecryptException */ public function decrypt($payload, $unserialize = true) { $payload = $this->getJsonPayload($payload); $iv = base64_decode($payload['iv']); $tag = empty($payload['tag']) ? null : base64_decode($payload['tag']); if (self::$supportedCiphers[strtolower($this->cipher)]['aead'] && strlen($tag) !== 16) { throw new DecryptException('Could not decrypt the data.'); } // Here we will decrypt the value. If we are able to successfully decrypt it // we will then unserialize it and return it out to the caller. If we are // unable to decrypt this value we will throw out an exception message. $decrypted = \openssl_decrypt( $payload['value'], strtolower($this->cipher), $this->key, 0, $iv, $tag ?? '' ); if ($decrypted === false) { throw new DecryptException('Could not decrypt the data.'); } return $unserialize ? unserialize($decrypted) : $decrypted; } /** * Decrypt the given string without unserialization. * * @param string $payload * @return string * * @throws \Illuminate\Contracts\Encryption\DecryptException */ public function decryptString($payload) { return $this->decrypt($payload, false); } /** * Create a MAC for the given value. * * @param string $iv * @param mixed $value * @return string */ protected function hash($iv, $value) { return hash_hmac('sha256', $iv.$value, $this->key); } /** * Get the JSON array from the given payload. * * @param string $payload * @return array * * @throws \Illuminate\Contracts\Encryption\DecryptException */ protected function getJsonPayload($payload) { $payload = json_decode(base64_decode($payload), true); // If the payload is not valid JSON or does not have the proper keys set we will // assume it is invalid and bail out of the routine since we will not be able // to decrypt the given value. We'll also check the MAC for this encryption. if (! $this->validPayload($payload)) { throw new DecryptException('The payload is invalid.'); } if (! self::$supportedCiphers[strtolower($this->cipher)]['aead'] && ! $this->validMac($payload)) { throw new DecryptException('The MAC is invalid.'); } return $payload; } /** * Verify that the encryption payload is valid. * * @param mixed $payload * @return bool */ protected function validPayload($payload) { return is_array($payload) && isset($payload['iv'], $payload['value'], $payload['mac']) && strlen(base64_decode($payload['iv'], true)) === openssl_cipher_iv_length(strtolower($this->cipher)); } /** * Determine if the MAC for the given payload is valid. * * @param array $payload * @return bool */ protected function validMac(array $payload) { return hash_equals( $this->hash($payload['iv'], $payload['value']), $payload['mac'] ); } /** * Get the encryption key. * * @return string */ public function getKey() { return $this->key; } }