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59 lines
1.9 KiB
PHTML
59 lines
1.9 KiB
PHTML
11 months ago
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<?php
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class Crypt {
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private $key = NULL;
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private $iv = NULL;
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private $iv_size = NULL;
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private $iterations = 999;
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public function Crypt($key = '') {
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$this->init($key);
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}
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public function init($key = "") {
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$this->key = ($key != "") ? $key : "";
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$this->algorithm = MCRYPT_DES;
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$this->mode = MCRYPT_MODE_ECB;
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$this->iv_size = mcrypt_get_iv_size($this->algorithm, $this->mode);
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$this->iv = mcrypt_create_iv($this->iv_size, MCRYPT_RAND);
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}
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public function encrypt($data) {
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$size = mcrypt_get_block_size($this->algorithm, $this->mode);
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$data = $this->pkcs5_pad($data, $size);
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return base64_encode(mcrypt_encrypt($this->algorithm, $this->key, $data, $this->mode, $this->iv));
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}
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public function decrypt($data) {
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return $this->pkcs5_unpad(rtrim(mcrypt_decrypt($this->algorithm, $this->key, base64_decode($data), $this->mode, $this->iv)));
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}
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public function encryptV2($plainText) {
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$key = hash_pbkdf2("sha256", $this->key, '', $this->iterations, 64);
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$encryptedData = openssl_encrypt($plainText, 'AES-256-CBC', hex2bin($key), OPENSSL_RAW_DATA);
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return base64_encode($encryptedData);
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}
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public function decryptV2($encryptedTextBase64) {
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$encryptedText = base64_decode($encryptedTextBase64);
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$key = hash_pbkdf2("sha256", $this->key, '', $this->iterations, 64);
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$decryptedText = openssl_decrypt($encryptedText, 'AES-256-CBC', hex2bin($key), OPENSSL_RAW_DATA);
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return $decryptedText;
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}
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private function pkcs5_pad($text, $blocksize) {
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$pad = $blocksize - (strlen($text) % $blocksize);
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return $text . str_repeat(chr($pad), $pad);
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}
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private function pkcs5_unpad($text) {
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$pad = ord($text{strlen($text) - 1});
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if ($pad > strlen($text))
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return false;
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if (strspn($text, chr($pad), strlen($text) - $pad) != $pad)
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return false;
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return substr($text, 0, -1 * $pad);
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}
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}
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