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openssl_sign

openssl_sign

Generate signature

bool **openssl_sign** string $data string $signature  $private_key  $algorithm int $padding

computes a signature for the

specified by generating a cryptographic digital signature using the private key associated with . Note that the data itself is not encrypted. openssl_sign``data``private_key

dataThe string of data you wish to sign

signature If the call was successful the signature is returned in . signature

private_key - a key, returned by OpenSSLAsymmetricKey``openssl_get_privatekey

    - a  formatted key
  `string`

algorithm - one of these . intSignature Algorithms

    - a valid string returned by  example, "sha256WithRSAEncryption" or "sha384".
  `string``openssl_get_md_methods`

paddingRSA PSS padding to use.

return.success

Voorbeeld: example

<?php
// $data is assumed to contain the data to be signed

// fetch private key from file and ready it
$pkeyid = openssl_pkey_get_private("file://src/openssl-0.9.6/demos/sign/key.pem");

// compute signature
openssl_sign($data, $signature, $pkeyid);

// free the key from memory
openssl_free_key($pkeyid);
?>

Voorbeeld: example

<?php
//data you want to sign
$data = 'my data';

//create new private and public key
$new_key_pair = openssl_pkey_new(array(
    "private_key_bits" => 2048,
    "private_key_type" => OPENSSL_KEYTYPE_RSA,
));
openssl_pkey_export($new_key_pair, $private_key_pem);

$details = openssl_pkey_get_details($new_key_pair);
$public_key_pem = $details['key'];

//create signature
openssl_sign($data, $signature, $private_key_pem, OPENSSL_ALGO_SHA256);

//save for later
file_put_contents('private_key.pem', $private_key_pem);
file_put_contents('public_key.pem', $public_key_pem);
file_put_contents('signature.dat', $signature);

//verify signature
$r = openssl_verify($data, $signature, $public_key_pem, "sha256WithRSAEncryption");
var_dump($r);
?>

openssl_verify

Vorige ← openssl_seal Volgende openssl_spki_export_challenge →

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