# openssl_open

(PHP 4 >= 4.0.4, PHP 5)

openssl_open — Open sealed data

### Description

bool openssl_open ( string `$sealed_data` , string `&$open_data` , string `$env_key` , mixed `$priv_key_id` )

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.

### Parameters

`sealed_data`

`open_data`

  If the call is successful the opened data is returned in this parameter.

`env_key`

`priv_key_id`

### Return Values

Returns `TRUE` on success or `FALSE` on failure.

### Examples

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);
?>`

### See Also

- openssl_seal()