


Detailed explanation of PHP DES encryption and decryption
This article introduces how to implement DES encryption and decryption in PHP. We will build a complete encryption function based on an existing decryption function and provide complete code examples.
First, we analyze the given decryption function:
/** * Hexadecimal to string * @param string $hex * @return string */ public function hextostr(string $hex) { $string = ""; for ($i = 0; $i hextostr($str)); return openssl_decrypt($base64, 'des-ecb', $key); }
Based on this, we create a class that contains encryption and decryption methods:
<?php class DES { private $key; public function __construct($key) { $this->key = $key; } /** * String to hexadecimal* @param string $str * @return string */ private function strToHex(string $str) { $hex = ''; for ($i = 0; $i key); return $this->strToHex($base64); } /** * Decryption* @param string $str * @return string */ public function desDecrypt(string $str) { $base64 = base64_decode($this->hexToStr($str)); return openssl_decrypt($base64, 'des-ecb', $this->key); } } $key = "testkey"; $des = new DES($key); $name = "123"; $encryptedName = $des->desEncrypt($name); echo "encrypted: " . $encryptedName . "\n"; $decryptedName = $des->desDecrypt($encryptedName); echo "Decrypted: " . $decryptedName . "\n"; ?>
This code defines DES
class, including desEncrypt
and desDecrypt
methods for encryption and decryption, respectively. strToHex
and hexToStr
methods are used for conversion between strings and hex strings. Finally, we verified the integrity of encryption and decryption with a test case. Please make sure your PHP environment has the OpenSSL extension installed. The key "testkey" is only used for examples. Please use a more secure key generation method in actual applications.
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