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

0 vote132 views1 answer
Php check valid time format
PHP
0 vote173 views1 answer
Adding data to a laravel collection
PHP Laravel
3 votes132 views3 answers
Php extract zip
PHP
0 vote176 views1 answer
Eager loading in hasmany belongsto relationship
PHP
1 vote149 views1 answer
Laravel gates
PHP Laravel
0 vote164 views6 answers
Pass all data to all pages laravel
PHP Laravel
17 votes157 views3 answers
Laravel make model controller and migration one time
PHP Laravel
0 vote133 views1 answer
Angular post phph
PHP
0 vote182 views1 answer
How to validate students who made payment in php and mysql
PHP
0 vote219 views1 answer
How to take last entry in database in laravel Method Three
PHP Laravel