Openssl encrypt php with key

<?php
//$key previously generated safely, ie: openssl_random_pseudo_bytes
$plaintext = "message to be encrypted";
$ivlen = openssl_cipher_iv_length($cipher="AES-128-CBC");
$iv = openssl_random_pseudo_bytes($ivlen);
$ciphertext_raw = openssl_encrypt($plaintext, $cipher, $key, $options=OPENSSL_RAW_DATA, $iv);
$hmac = hash_hmac('sha256', $ciphertext_raw, $key, $as_binary=true);
$ciphertext = base64_encode( $iv.$hmac.$ciphertext_raw );

//decrypt later....
$c = base64_decode($ciphertext);
$ivlen = openssl_cipher_iv_length($cipher="AES-128-CBC");
$iv = substr($c, 0, $ivlen);
$hmac = substr($c, $ivlen, $sha2len=32);
$ciphertext_raw = substr($c, $ivlen+$sha2len);
$original_plaintext = openssl_decrypt($ciphertext_raw, $cipher, $key, $options=OPENSSL_RAW_DATA, $iv);
$calcmac = hash_hmac('sha256', $ciphertext_raw, $key, $as_binary=true);
if (hash_equals($hmac, $calcmac))// timing attack safe comparison
{
    echo $original_plaintext."\n";
}
?>

Source: php.net

Similar codes

20 votes345 views4 answers
Laravel bootstrap auth
PHP
0 vote333 views1 answer
Get parameter php
PHP
0 vote337 views1 answer
Search a file name and open that file phpstrom
PHP
0 vote443 views1 answer
Laravel get previous route without domain
PHP Laravel
-1 vote325 views4 answers
Laravel collection find
PHP
1 vote406 views2 answers
Get the current page id in wordpress
PHP Wordpress
0 vote357 views1 answer
Php set http status header
PHP
38 votes310 views2 answers
Create request laravel command
PHP Laravel
0 vote321 views1 answer
SendEmailVerificationNotification::class
PHP
0 vote488 views1 answer
Symfony request get all parameters
PHP Symfony