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<?php |
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/** |
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* Security Functions for API Key Encryption/Decryption |
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* |
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* @package BdThemes\AiImage |
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*/ |
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|
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namespace BDT_AI_IMG; |
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|
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// Exit if accessed directly |
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if (!defined('ABSPATH')) { |
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exit; |
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} |
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|
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/** |
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* Encrypt a string using AES-256-CBC encryption |
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* |
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* @param string $plain_text The text to encrypt |
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* @return string The encrypted string (base64 encoded) |
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*/ |
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function encrypt_key($plain_text) { |
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if (empty($plain_text)) { |
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return ''; |
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} |
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|
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// Get the encryption key from constant |
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if (!defined('AI_IMAGE_ENCRYPTION_KEY')) { |
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return $plain_text; // Return plain text if no encryption key is defined |
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} |
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|
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$encryption_key = AI_IMAGE_ENCRYPTION_KEY; |
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|
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// Generate a key from the constant using MD5 (as requested) |
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$key = md5($encryption_key, true); |
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|
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// Generate a random initialization vector |
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$iv_length = openssl_cipher_iv_length('aes-256-cbc'); |
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$iv = openssl_random_pseudo_bytes($iv_length); |
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|
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// Encrypt the data |
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$encrypted = openssl_encrypt( |
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$plain_text, |
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'aes-256-cbc', |
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$key, |
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OPENSSL_RAW_DATA, |
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$iv |
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); |
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|
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// Combine IV and encrypted data, then base64 encode |
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return base64_encode($iv . $encrypted); |
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} |
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|
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/** |
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* Decrypt a string using AES-256-CBC decryption |
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* |
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* @param string $encrypted_text The encrypted text (base64 encoded) |
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* @return string The decrypted plain text |
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*/ |
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function decrypt_key($encrypted_text) { |
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if (empty($encrypted_text)) { |
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return ''; |
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} |
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|
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// Get the encryption key from constant |
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if (!defined('AI_IMAGE_ENCRYPTION_KEY')) { |
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return $encrypted_text; // Return as-is if no encryption key is defined |
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} |
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|
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$encryption_key = AI_IMAGE_ENCRYPTION_KEY; |
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|
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// Generate a key from the constant using MD5 (as requested) |
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$key = md5($encryption_key, true); |
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|
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// Decode the base64 encoded data |
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$data = base64_decode($encrypted_text); |
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|
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if ($data === false) { |
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return ''; // Invalid base64 |
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} |
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|
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// Extract IV and encrypted data |
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$iv_length = openssl_cipher_iv_length('aes-256-cbc'); |
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$iv = substr($data, 0, $iv_length); |
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$encrypted = substr($data, $iv_length); |
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|
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// Decrypt the data |
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$decrypted = openssl_decrypt( |
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$encrypted, |
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'aes-256-cbc', |
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$key, |
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OPENSSL_RAW_DATA, |
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$iv |
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); |
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|
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return $decrypted !== false ? $decrypted : ''; |
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} |
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|
