function encrypt($text,$key){
$method = 'AES-256-CBC';
$size = openssl_cipher_iv_length($method);
$iv = substr($key, 0, $size);
$openssl = openssl_encrypt($text, $method, $key, OPENSSL_RAW_DATA | OPENSSL_ZERO_PADDING, $iv);
return base64_encode($openssl);
}
This method does not return anything, I am just trying to write a reliable encryption function using openssl.
Correct syntax is
$openssl = openssl_encrypt($text, $method, $key, OPENSSL_RAW_DATA || OPENSSL_ZERO_PADDING, $iv);
Related
I was using the mcrypt_get_iv_size function with my website and now it seems that it's deprecated
function Encrypt($word){
$key = '.......';
$iv = mcrypt_create_iv(
mcrypt_get_iv_size(MCRYPT_RIJNDAEL_128, MCRYPT_MODE_CBC),
MCRYPT_DEV_URANDOM
);
$encrypted = base64_encode(
$iv .
mcrypt_encrypt(
MCRYPT_RIJNDAEL_128,
hash('sha256', $key, true),
$word,
MCRYPT_MODE_CBC,
$iv
)
);
return $encrypted;
}
function Decrypt($word){
$key = '.......';
$data = base64_decode($word);
$iv = substr($data, 0, mcrypt_get_iv_size(MCRYPT_RIJNDAEL_128, MCRYPT_MODE_CBC));
$decrypted = rtrim(
mcrypt_decrypt(
MCRYPT_RIJNDAEL_128,
hash('sha256', $key, true),
substr($data, mcrypt_get_iv_size(MCRYPT_RIJNDAEL_128, MCRYPT_MODE_CBC)),
MCRYPT_MODE_CBC,
$iv
),
"\0"
);
return $decrypted;
}
Now I found a new function from stackoverflow which is this one
function Encrypt($word) {
$key = '.......';
$iv = openssl_random_pseudo_bytes(openssl_cipher_iv_length('aes-256-cbc'));
$encrypted = openssl_encrypt($word, 'aes-256-cbc', $key, 0, $iv);
return base64_encode($encrypted . '::' . $iv);
}
function Decrypt($word) {
$key = '.......';
list($encrypted_data, $iv) = explode('::', base64_decode($word), 2);
return openssl_decrypt($encrypted_data, 'aes-256-cbc', $key, 0, $iv);
}
My question is:
Do I have to use my previously working Decrypt function to get export all my encrypted words from my database and then Encrypt them with the new function and then import/update them into my database? Or is there a way to be able to Decrypt my words from the new function only?
Thanks!
I am sending data to API and They uses Java Function, I Replicated Encryption in PHP but I am unable to Decrypt Response Data.
I tried Various Encryption but They Strictly Use this Encryption Decryption, I cannot Change Encryption I had to follow this.
Encryption Function Works Properly:
function encrypt($input, $key) {
$size = mcrypt_get_block_size(MCRYPT_RIJNDAEL_128, MCRYPT_MODE_ECB);
$input = pkcs5_pad($input, $size);
$td = mcrypt_module_open(MCRYPT_RIJNDAEL_128, '', MCRYPT_MODE_ECB, '');
$iv = mcrypt_create_iv(mcrypt_enc_get_iv_size($td), MCRYPT_RAND);
mcrypt_generic_init($td, $key, $iv);
$data = mcrypt_generic($td, $input);
mcrypt_generic_deinit($td);
mcrypt_module_close($td);
$data = base64_encode($data);
return $data;
}
function pkcs5_pad($text, $blocksize) {
$pad = $blocksize - (strlen($text) % $blocksize);
return $text . str_repeat(chr($pad), $pad);
}
Decryption Function I tried:
function decrypt($sStr, $sKey) {
$decrypted = mcrypt_decrypt(
MCRYPT_RIJNDAEL_128, $sKey, base64_decode($sStr), MCRYPT_MODE_ECB
);
$dec_s = strlen($decrypted);
$padding = ord($decrypted[$dec_s - 1]);
$decrypted = substr($decrypted, 0, -$padding);
return $decrypted;
}
As an Output I am Getting ??? which is wrong Encryption.
Do not Duplicate this As I have Searched More than 3 hours, then I posted Question.
function decrypt($sStr, $sKey) {
$decrypted = mcrypt_decrypt(
MCRYPT_RIJNDAEL_128, $sKey, base64_decode($sStr), MCRYPT_MODE_ECB
);
$dec_s = strlen($decrypted);
$padding = ord($decrypted[$dec_s - 1]);
$decrypted = substr($decrypted, 0, -$padding);
$decrypted = base64_encode($decrypted ); //This line Added.
return $decrypted;
}
I was getting Byte format I wasn't converting the data into base64_encode, Now It is Working.
I am rewriting code to be compatible with PHP 7.2. Old code is
public function encryptPasswordOld($password, $salt)
{
$key = md5($salt);
$result = mcrypt_encrypt(MCRYPT_RIJNDAEL_128, $key, $password, MCRYPT_MODE_ECB);
return base64_encode($result);
}
New code should be according to my research something like this
public function encryptPasswordNew($password, $salt)
{
$method = 'AES-256-ECB';
$ivSize = openssl_cipher_iv_length($method);
$iv = openssl_random_pseudo_bytes($ivSize);
$key = md5($salt);
$result = openssl_encrypt($password, $method, $key, OPENSSL_RAW_DATA, $iv);
return base64_encode($result);
}
but I tried every combination of openssl_encrypt options: OPENSSL_RAW_DATA, OPENSSL_RAW_DATA | OPENSSL_ZERO_PADDING, OPENSSL_ZERO_PADDING, 0 and still ended up with different result as the old method returns
try to use pkcs5padding on value before encrypt. i.e.
remember the blocksize should be 8-byte based, i.e. 8/16/24 etc.
function pkcs5_pad($text, $blocksize)
{
$pad = $blocksize - (strlen($text) % $blocksize);
return $text . str_repeat(chr(0), $pad);
}
and encrypt option should be OPENSSL_RAW_DATA | OPENSSL_ZERO_PADDING, i.e.
openssl_encrypt(pkcs5_pad($value, 16), 'aes-256-ecb', $aes_key, 3, '')
I need to encrypt some SOAP header fields, and I currently have the following code working in a project with PHP 5.6 version.
function getBaseEncoded($data, $key)
{
$size = $this->pkcs5_pad($data, mcrypt_get_block_size(MCRYPT_RIJNDAEL_128, MCRYPT_MODE_ECB));
$iv = mcrypt_create_iv(mcrypt_get_iv_size(MCRYPT_RIJNDAEL_128, MCRYPT_MODE_ECB), MCRYPT_RAND);
$result = mcrypt_encrypt(MCRYPT_RIJNDAEL_128, $key, $size, MCRYPT_MODE_ECB, $iv);
return trim(base64_encode($result));
}
private function pkcs5_pad($text, $blocksize)
{
$pad = $blocksize - (strlen($text) % $blocksize);
return $text . str_repeat (chr($pad), $pad);
}
What happens is that now I have in my hands a similiar project but with PHP 7, and the function MCRYPT is deprecated and I need to switch it to OPENSSL_ENCRYPT.
The code below is my first attempt:
function getBaseEncoded($data, $key)
{
$result = openssl_encrypt($data, 'AES-128-ECB', $key, OPENSSL_RAW_DATA | OPENSSL_ZERO_PADDING);
return trim(base64_encode($result));
}
But I'm now receiving a SOAP error with the message
SoapFault => Could not connect to host
and it got me thinking if the problem is on my new function?
You are missing some initializator vector data.
$ivsize = openssl_cipher_iv_length('AES-128-ECB');
$iv = openssl_random_pseudo_bytes($ivsize);
$ciphertext = openssl_encrypt(
$data,
'AES-128-ECB',
$key,
OPENSSL_RAW_DATA | OPENSSL_ZERO_PADDING,
$iv
);
echo encrypt_openssl($data, $key);
function encrypt_openssl($msg, $key, $iv = null) {
$iv_size = openssl_cipher_iv_length('AES-128-ECB');
if (!$iv) {
$iv = openssl_random_pseudo_bytes($iv_size);
}
$encryptedMessage = openssl_encrypt($msg, 'AES-128-ECB', $key, OPENSSL_RAW_DATA, $iv);
return base64_encode($iv . $encryptedMessage);
}
Currently im using
$key="pass";
$val="secret";
$encp=mcrypt_encrypt(MCRYPT_DES, $key, $val, MCRYPT_MODE_ECB);
But when i call printf($encp)
No value is displayed,im using PHP version 5.2.17
Is there a better way to do it.Please help.
EDIT:
<?PHP
define('SECURE_KEY','Somekey');
function encrypt($value){
$iv_size = mcrypt_get_iv_size(MCRYPT_RIJNDAEL_256, MCRYPT_MODE_ECB);
$iv = mcrypt_create_iv($iv_size, MCRYPT_RAND);
return mcrypt_encrypt(MCRYPT_RIJNDAEL_256, SECURE_KEY, $value, MCRYPT_MODE_ECB, $iv);
}
function decrypt($value){
$iv_size = mcrypt_get_iv_size(MCRYPT_RIJNDAEL_256, MCRYPT_MODE_ECB);
$iv = mcrypt_create_iv($iv_size, MCRYPT_RAND);
return trim(mcrypt_decrypt(MCRYPT_RIJNDAEL_256, SECURE_KEY, $value, MCRYPT_MODE_ECB, $iv));
}
$temp=encrypt("teststring");
printf($temp);
?>
Update (27/09/17):
Since mcrypt_encrypt is DEPRECATED as of PHP 7.1.0. Ive added a simple encrypt/decrypt using openssl.
function encrypt($string, $key = 'PrivateKey', $secret = 'SecretKey', $method = 'AES-256-CBC') {
// hash
$key = hash('sha256', $key);
// create iv - encrypt method AES-256-CBC expects 16 bytes
$iv = substr(hash('sha256', $secret), 0, 16);
// encrypt
$output = openssl_encrypt($string, $method, $key, 0, $iv);
// encode
return base64_encode($output);
}
function decrypt($string, $key = 'PrivateKey', $secret = 'SecretKey', $method = 'AES-256-CBC') {
// hash
$key = hash('sha256', $key);
// create iv - encrypt method AES-256-CBC expects 16 bytes
$iv = substr(hash('sha256', $secret), 0, 16);
// decode
$string = base64_decode($string);
// decrypt
return openssl_decrypt($string, $method, $key, 0, $iv);
}
$str = 'Encrypt this text';
echo "Plain: " .$str. "\n";
// encrypt
$encrypted_str = encrypt($str);
echo "Encrypted: " .$encrypted_str. "\n";
// decrypt
$decrypted_str = decrypt($encrypted_str);
echo "Decrypted: " .$decrypted_str. "\n";
Try these: (PHP < 7.1.0) If your using > PHP 7.1.0 see above.
define('SECURE_KEY','Somekey');//Assigned within a config, pref outside of root dir
function encrypt($value){
$iv_size = mcrypt_get_iv_size(MCRYPT_RIJNDAEL_256, MCRYPT_MODE_ECB);
$iv = mcrypt_create_iv($iv_size, MCRYPT_RAND);
return mcrypt_encrypt(MCRYPT_RIJNDAEL_256, SECURE_KEY, $value, MCRYPT_MODE_ECB, $iv);
}
function decrypt($value){
$iv_size = mcrypt_get_iv_size(MCRYPT_RIJNDAEL_256, MCRYPT_MODE_ECB);
$iv = mcrypt_create_iv($iv_size, MCRYPT_RAND);
return trim(mcrypt_decrypt(MCRYPT_RIJNDAEL_256, SECURE_KEY, $value, MCRYPT_MODE_ECB, $iv));
}
//Simple usage
$encryptedString = encrypt('This String Will Be encrypted');
echo decrypt($encryptedString);
Edited from source - http://php.net/manual/en/function.mcrypt-encrypt.php
Try these PHP functions convert_uuencode and convert_uudecode:
function encrypt_decrypt ($data, $encrypt) {
if ($encrypt == true) {
$output = base64_encode (convert_uuencode ($data));
} else {
$output = convert_uudecode (base64_decode ($data));
}
return $output;
}
$enc_txt = encrypt_decrypt ("PASSWORD TEXT", true);
echo $enc_txt."\n";
// LTQkJTM0VT0vNEQwQDUkNTg1YGBgCmAK
echo encrypt_decrypt ($enc_txt, false);
// PASSWORD TEXT
This is much simpler and does not depend on libraries installed in PHP