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openssl_open

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 )

Returns TRUE on success or FALSE on failure. 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

<?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().

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