(PHP 4 >= 4.0.4, PHP 5, PHP 7)
openssl_open — Open sealed data
openssl_open ( string $sealed_data , string &$open_data , string $env_key , mixed $priv_key_id [, string $method = "RC4" [, string $iv ]] ) : bool
openssl_open() opens (decrypts) sealed_data
using the private key associated with the key identifier priv_key_id
and the envelope key env_key
, and fills open_data
with the decrypted data. The envelope key is generated when the data are sealed and can only be used by one specific private key. See openssl_seal() for more information.
sealed_data
open_data
If the call is successful the opened data is returned in this parameter.
env_key
priv_key_id
method
The cipher method.
The default value ('RC4'
) is considered insecure. It is strongly recommended to explicitly specify a secure cipher method.
iv
The initialization vector.
Returns true
on success or false
on failure.
Example #1 openssl_open() example
<?php // $sealed and $env_key are assumed to contain the sealed data // and our envelope key, both given to us by the sealer. // fetch private key from file and ready it $fp = fopen("/src/openssl-0.9.6/demos/sign/key.pem", "r"); $priv_key = fread($fp, 8192); fclose($fp); $pkeyid = openssl_get_privatekey($priv_key); // decrypt the data and store it in $open if (openssl_open($sealed, $open, $env_key, $pkeyid)) { echo "here is the opened data: ", $open; } else { echo "failed to open data"; } // free the private key from memory openssl_free_key($pkeyid); ?>
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https://www.php.net/manual/en/function.openssl-open.php