initial commit

src/DataEncryptor.php

@@ -0,0 +1,70 @@
+<?php
+
+namespace Hpz937\Encryption;
+
+/**
+ * Class DataEncryptor provides methods to encrypt and decrypt data using OpenSSL with AES-256-CBC encryption.
+ */
+class DataEncryptor {
+    /**
+     * @var string The encryption method to use.
+     */
+    private $encryptMethod = "AES-256-CBC";
+
+    /**
+     * @var string The secret key for encryption and decryption.
+     */
+    private $secretKey;
+
+    /**
+     * Constructs the DataEncryptor object with a secret key.
+     *
+     * @param string $key The secret key used for encryption and decryption. It is recommended to be a strong, unique key.
+     */
+    public function __construct(string $key)
+    {
+        $this->secretKey = hash('sha256', $key);
+    }
+
+    /**
+     * Encrypts the given data using AES-256-CBC encryption and returns the base64 encoded encrypted data with the IV prepended.
+     *
+     * @param string $data The plaintext data to encrypt.
+     * @return string The base64 encoded encrypted data with the IV prepended.
+     */
+    public function encrypt($data)
+    {
+        // Generate a unique IV for each encryption
+        $iv = openssl_random_pseudo_bytes(openssl_cipher_iv_length($this->encryptMethod));
+
+        // Encrypt the data
+        $encryptedData = openssl_encrypt($data, $this->encryptMethod, $this->secretKey, 0, $iv);
+
+        // Prepend the IV to the encrypted data for storage
+        $encryptedDataWithIv = base64_encode($iv . $encryptedData);
+
+        return $encryptedDataWithIv;
+    }
+
+    /**
+     * Decrypts the given data, which includes the IV and the encrypted data, using AES-256-CBC decryption.
+     *
+     * @param string $dataWithIv The base64 encoded encrypted data with the IV prepended.
+     * @return string The decrypted plaintext data.
+     */
+    public function decrypt($dataWithIv)
+    {
+        // Decode from base64
+        $dataWithIv = base64_decode($dataWithIv);
+
+        // Extract the IV and encrypted data
+        $ivLength = openssl_cipher_iv_length($this->encryptMethod);
+        $iv = substr($dataWithIv, 0, $ivLength);
+        $encryptedData = substr($dataWithIv, $ivLength);
+
+        // Decrypt the data
+        $decryptedData = openssl_decrypt($encryptedData, $this->encryptMethod, $this->secretKey, 0, $iv);
+
+        return $decryptedData;
+    }    
+}