Last updated: Fri, 20 Nov 2009

openssl_pkey_export

(PHP 4 >= 4.2.0, PHP 5)

openssl_pkey_export — Gets an exportable representation of a key into a string

Description

bool openssl_pkey_export ( mixed $key , string &$out [, string $passphrase [, array $configargs ]] )

openssl_pkey_export() exports key as a PEM encoded string and stores it into out (which is passed by reference).

Note: You need to have a valid openssl.cnf installed for this function to operate correctly. See the notes under the installation section for more information.

Parameters

key
out
passphrase: The key is optionally protected by passphrase .
configargs: configargs can be used to fine-tune the export process by specifying and/or overriding options for the openssl configuration file. See openssl_csr_new() for more information about configargs .

Return Values

Returns TRUE on success or FALSE on failure.

openssl_pkey_free

openssl_pkey_export_to_file

Last updated: Fri, 20 Nov 2009

add a note User Contributed Notes
openssl_pkey_export

Tk at phpRocks dot net
03-May-2009 02:58


Complete example to encrypt data...

=)

<pre>

<?php

// Create the keypair

$res=openssl_pkey_new();



// Get private key

openssl_pkey_export($res, $privkey, "PassPhrase number 1" );



// Get public key

$pubkey=openssl_pkey_get_details($res);

$pubkey=$pubkey["key"];

//var_dump($privkey);

//var_dump($pubkey);



// Create the keypair

$res2=openssl_pkey_new();



// Get private key

openssl_pkey_export($res2, $privkey2, "This is a passPhrase *µà" );



// Get public key

$pubkey2=openssl_pkey_get_details($res2);

$pubkey2=$pubkey2["key"];

var_dump($privkey2);

var_dump($pubkey2);



$data = "Only I know the purple fox. Trala la !";



openssl_seal($data, $sealed, $ekeys, array($pubkey, $pubkey2));



var_dump("sealed");

var_dump(base64_encode($sealed));

var_dump(base64_encode($ekeys[0]));

var_dump(base64_encode($ekeys[1]));



// decrypt the data and store it in $open

if (openssl_open($sealed, $open, $ekeys[1], openssl_pkey_get_private  ($privkey2  ,"This is a passPhrase *µà" ) ) ) {

    echo "here is the opened data: ", $open;

} else {

    echo "failed to open data";

}



?>

</pre>



Outputs :

string(963) "-----BEGIN RSA PRIVATE KEY-----

Proc-Type: 4,ENCRYPTED

DEK-Info: DES-EDE3-CBC,DA1943487C9C83B2



1/j65PJgfYqYMJSWRBk9UzXaa3USMdpkq4ztzL7IPMTPgTwVKxZbvBxzsGUXUmh6

dkWpF1jzi3B44o06mw55t2LHNkGAph/iKVP4Zvnyp/KWaZJSF+pNkvukle1u2/40

WpbNy1f8LA+ZDr7ICOCY1jy/bz/xzOCrVjqY/F4ukQik9M6bL9ZwI5fyhrcHq6EG

KsUX49XKtP/a+kQhluejzIw1aDBqmHpJTCzkL7teCk6l8x8r8mMmss1D9XqggjFm

TQncqR6IU5DClklO53JdWSFC5zTcFYMgq9lMwCQ5o4bs8iBKiE+TOFEKiggtn5zA

v189tlPtM6YePcXAm5Ymgy90Ovq3lGS4k+JkCB2Hm3HgUAB3pd9v3fOeyuFMeing

XHBuLR5nmWITzcfRuAsh0p9xe2puTVFdrLkrQFnh5Xkerm+YUQ6oTecTKRFq7S3l

hLlFIg7KbXxDjg3H5f87DCEp/isV70Rc7flvIBP6u5GX+GrmCFWjQxmGefEJQ5fZ

P7sOzHEdkOHZV7yYn+5MwQ4vDHLKQxvMqUolgvuEAzcL1o976KHAQP0accmwApXz

jry3zVqRnGvyPHo+nGwRiATJj0lAgX/j8cghJg+oo+TiXD2cM5i+Hut4dmImZNDL

3Fn2uLzklQHPlaoaz2dACyaN/sUtmVLtdnn00nuwIy2xDfHDl9MOQ6WHocU78DWo

Mw+x8B+SBsALm3Ah6JzqA8l3OAYSRxjp7YQXLQLkdCi7jEjjTl/0NVTnqU+W89XB

GBH3r8ZgIpifl3M7ZYTKLnToNL7Y/AehPs+tKgFHkXtGMKu4cIt9Ag==

-----END RSA PRIVATE KEY-----

"

string(272) "-----BEGIN PUBLIC KEY-----

MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDH82E/Dn37torKz/vhAkpji9ZS

HCyfM7JuXCbh70F75Zh2/rEVvz38yNf6f01DNXiSpzO5eTmoXD7Blsb635AOjYbl

X/WljpFbwQ2QUUDlNDAslrqXYlMzht2MCq/pjtGgk0zJx6i+HjFyV7mebeePQY/x

NOzMpmy/Ke3u+SSHRwIDAQAB

-----END PUBLIC KEY-----

"

string(6) "sealed"

string(52) "y4L3+SDVJwTfa9Em61R3X2p/LElr8N/xPCXw8kqm0co4bn3V1Tw="

string(172) "ezUo2rWLGHPv9bHE5gG8fe5qy8erGlITsSs+qGr2o8aoi98SLnyIFm4N

EQWJrmU43Ehlw72NujJ

B8chYNw2NkIDfaLChvLH54CBuCfyuF+1lWEAUwL8

FU1LftqIIt1ikjSu/8qFU6S6wikJx1pFf1IbXfOeeJVvZ1UJM2rBbudI="

string(172) "RPYLXGBXDnXDIUrFy1/GOM+//Ew/mn2syKDbhIegOJJPnpd

X6ffwXkWH5Bp8kOdz0aO9gK3whG+c

/QF+9eqcTw9SvvlrDqsP0gkRGNIOgMUiBFLoMT92JQWSI7ZesDAU0

JPRWpXsKaIOEkBGmxOMYfEd6OJWp0Mwe4COL3lP2PQ="

here is the opened data: Only I know the purple fox. Trala la !

07-May-2007 07:31


you can get public key using openssl_pkey_get_details(resource $key ) function:



<?php



$pub_key = openssl_pkey_get_public(file_get_contents('./cert.crt'));

$keyData = openssl_pkey_get_details($pub_key);

fule_put_contents('./key.pub', $keyData['key']);



?>

robbat2 at gentoo dot org
09-Aug-2004 06:47


Warning, this function is NOT capable of exporting PEM-encoded public keys. It can only export private keys.

add a note

openssl_pkey_free

openssl_pkey_export_to_file

Last updated: Fri, 20 Nov 2009