(PHP 4 >= 4.0.4)
openssl_open -- Open sealed data
Description
bool openssl_open (string sealed_data, string open_data, string env_key, mixed priv_key_id)
Returns true on success, or false on error. If successful the opened
data is returned in open_data.
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.
Example 1. openssl_open() example
// $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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See also openssl_seal().