Online PHP editor | output for mYgn6

<?php $encryption_key="adfgjderuspmwzwt"; $encryptedText = "02eftQAHQKejcfMJYbm06GD21HqFCj55uhAMLqbdGEONSHWLVMn1dIchgEFCNZvCSW7oPM44qyqQ"; $key="adfgjderuspmwzwt"; $data = "02eftQAHQKejcfMJYbm06GD21HqFCj55uhAMLqbdGEONSHWLVMn1dIchgEFCNZvCSW7oPM44qyqQ"; /*$encryptionMethod = "AES-256-CBC"; // DEFINE our cipher define('AES_256_CBC', 'aes-256-cbc'); // Generate a 256-bit encryption key // This should be stored somewhere instead of recreating it each time $encryption_key = openssl_random_pseudo_bytes(32); $iv = openssl_random_pseudo_bytes(openssl_cipher_iv_length($encryptionMethod)); $encrypted = $encryptedText . ':' . $iv; $parts = explode(':', $encrypted); $decrypted = openssl_decrypt($parts[0], $encryptionMethod, $encryption_key, 0, $parts[1]); echo "Decrypted: $decrypted\n";*/ /*function decrypt($data, $key) { $decode = base64_decode($data); return mcrypt_decrypt(MCRYPT_RIJNDAEL_128,$key,$decode,"MCRYPT_MODE_CBC","\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"); } decrypt($data, $key);*/ /** * Decrypt a text encrypted by AES in counter mode of operation * * @param ciphertext source text to be decrypted * @param password the password to use to generate a key * @param nBits number of bits to be used in the key (128, 192, or 256) * @return decrypted text */ function decrypt($ciphertext, $password, $nBits) { $blockSize = 16; // block size fixed at 16 bytes / 128 bits (Nb=4) for AES if (!($nBits == 128 || $nBits == 192 || $nBits == 256)) return ''; // standard allows 128/192/256 bit keys $ciphertext = base64_decode($ciphertext); // use AES to encrypt password (mirroring encrypt routine) $nBytes = $nBits / 8; // no bytes in key $pwBytes = array(); for ($i = 0; $i < $nBytes; $i++) $pwBytes[$i] = ord(substr($password, $i, 1)) & 0xff; $key = Aes::cipher($pwBytes, Aes::keyExpansion($pwBytes)); $key = array_merge($key, array_slice($key, 0, $nBytes - 16)); // expand key to 16/24/32 bytes long // recover nonce from 1st element of ciphertext $counterBlock = array(); $ctrTxt = substr($ciphertext, 0, 8); for ($i = 0; $i < 8; $i++) $counterBlock[$i] = ord(substr($ctrTxt, $i, 1)); // generate key schedule $keySchedule = Aes::keyExpansion($key); // separate ciphertext into blocks (skipping past initial 8 bytes) $nBlocks = ceil((strlen($ciphertext) - 8) / $blockSize); $ct = array(); for ($b = 0; $b < $nBlocks; $b++) $ct[$b] = substr($ciphertext, 8 + $b * $blockSize, 16); $ciphertext = $ct; // ciphertext is now array of block-length strings // plaintext will get generated block-by-block into array of block-length strings $plaintxt = array(); for ($b = 0; $b < $nBlocks; $b++) { // set counter (block #) in last 8 bytes of counter block (leaving nonce in 1st 8 bytes) for ($c = 0; $c < 4; $c++) $counterBlock[15 - $c] = self::urs($b, $c * 8) & 0xff; for ($c = 0; $c < 4; $c++) $counterBlock[15 - $c - 4] = self::urs(($b + 1) / 0x100000000 - 1, $c * 8) & 0xff; $cipherCntr = Aes::cipher($counterBlock, $keySchedule); // encrypt counter block $plaintxtByte = array(); for ($i = 0; $i < strlen($ciphertext[$b]); $i++) { // -- xor plaintext with ciphered counter byte-by-byte -- $plaintxtByte[$i] = $cipherCntr[$i] ^ ord(substr($ciphertext[$b], $i, 1)); $plaintxtByte[$i] = chr($plaintxtByte[$i]); } $plaintxt[$b] = implode('', $plaintxtByte); } // join array of blocks into single plaintext string $plaintext = implode('', $plaintxt); return $plaintext; } decrypt($data, $key,256);