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

1 vote258 views1 answer
Laravel group by created_at date only
PHP
15 votes255 views3 answers
Php sort array of array by key
PHP
13 votes274 views5 answers
Laravel validation custom message example
PHP Laravel
3 votes257 views2 answers
Php get intersection of arrays
PHP
0 vote253 views1 answer
Remove nul value aray php
PHP
3 votes257 views3 answers
Loop index foreach laravel
PHP Laravel
38 votes302 views6 answers
Create table laravel
PHP
1 vote299 views1 answer
Where year month laravel
PHP Laravel
0 vote366 views1 answer
Cakephp get present name
PHP CakePHP
0 vote316 views1 answer
Laravel asset prevent browser caching
PHP Laravel