[edit] Last updated: Fri, 25 May 2012

openssl_pkey_new

(PHP 4 >= 4.2.0, PHP 5)

openssl_pkey_new — Génère une nouvelle clé privée

Description

resource openssl_pkey_new ([ array $configargs ] )

openssl_pkey_new() génère une nouvelle paire de clés, une privée et une publique. La partie publique en est accessible via la fonction openssl_pkey_get_public().

Note: Vous devez avoir un fichier openssl.cnf valide et installé pour que cette fonction opère correctement. Voir les notes se trouvant dans la section concernant l'installation pour plus d'informations.

Liste de paramètres

configargs: Vous pouvez calibrer la génération de la clé (comme le nombre de bits) en utilisant le paramètre configargs. Voir la fonction openssl_csr_new() pour plus de détails sur configargs.

Valeurs de retour

Retourne un identifiant de ressource pour la pkey en cas de succès, FALSE sinon.

openssl_private_decrypt

openssl_pkey_get_public

[edit] Last updated: Fri, 25 May 2012

add a note User Contributed Notes openssl_pkey_new

jthijssen at notloxic dot nl 11-Feb-2011 06:17


If you want to change the default private key size (1024) too something else you can use the following code:

 

<?php 

$config = array('private_key_bits' => 512);

$privKey = openssl_pkey_new($config);



?>



Mind though that the minimum number of bits is 384. Any lower will trigger an error.

Brad 02-Apr-2008 12:17


It's easier than all that, if you just want the keys:



<?php

// Create the keypair

$res=openssl_pkey_new();



// Get private key

openssl_pkey_export($res, $privkey);



// Get public key

$pubkey=openssl_pkey_get_details($res);

$pubkey=$pubkey["key"];

?>

NOSPAM dot alchaemist at hiperlinux dot com dot ar 30-May-2004 12:17


As you probably found, getting the public key is not as direct as you might think with this documentation.



You can easily get into messages like:



Warning: openssl_pkey_get_public(): Don't know how to get public key from this private key (the documentation lied) in D:\www\keys.php on line 4



The correct steps to get the whole thing seem to be these:



<?

$dn = array("countryName" => 'XX', "stateOrProvinceName" => 'State', "localityName" => 'SomewhereCity', "organizationName" => 'MySelf', "organizationalUnitName" => 'Whatever', "commonName" => 'mySelf', "emailAddress" => 'user@domain.com');

$privkeypass = '1234';

$numberofdays = 365;



$privkey = openssl_pkey_new();

$csr = openssl_csr_new($dn, $privkey);

$sscert = openssl_csr_sign($csr, null, $privkey, $numberofdays);

openssl_x509_export($sscert, $publickey);

openssl_pkey_export($privkey, $privatekey, $privkeypass);

openssl_csr_export($csr, $csrStr);



echo $privatekey; // Will hold the exported PriKey

echo $publickey;  // Will hold the exported PubKey

echo $csrStr;     // Will hold the exported Certificate

?>



Now all you need to do is to make some research on each individual function.

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