openssl_open

Open sealed data

&reftitle.description; `bool` `openssl_open` `string` `sealed_data` `string` `open_data` `string` `env_key` `mixed` `priv_key_id` `string` `method`

`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.

&reftitle.parameters;

`sealed_data`

`open_data`

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

`env_key`

`priv_key_id`

&reftitle.returnvalues;

&return.success;

&reftitle.examples;

### `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);
    ?>

&reftitle.seealso;

- `openssl_seal`