(PHP 4 >= 4.0.4, PHP 5)
openssl_sign — Generate signature
openssl_sign() computes a signature for the specified data by using SHA1 for hashing followed by encryption using the private key associated with priv_key_id. Note that the data itself is not encrypted.
If the call was successful the signature is returned in signature.
For more information see the list of Signature Algorithms.
Returns TRUE on success or FALSE on failure.
| Version | Description |
|---|---|
| 5.0.0 | The signature_alg parameter was added. |
Example #1 openssl_sign() example
<?php
// $data is assumed to contain the data to be signed
// 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);
// compute signature
openssl_sign($data, $signature, $pkeyid);
// free the key from memory
openssl_free_key($pkeyid);
?>