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This document uses PHP Chinese website manual Release
(PHP 5 >= 5.6.0)
openssl_spki_export — Exports a valid PEM formatted public key signed public key and challenge
&$spkac
)Exports PEM formatted public key from encoded signed public key and challenge
spkac
Expects a valid signed public key and challenge
Returns the associated PEM formatted public key or NULL on failure.
Emits an E_WARNING
level error if an invalid argument
is passed via the spkac
parameter.
Example #1 openssl_spki_export() example
Extracts the associated PEM formatted public key or NULL on failure.
<?php
$pkey = openssl_pkey_new ( 'secret password' );
$spkac = openssl_spki_new ( $pkey , 'challenge string' );
$pubKey = openssl_spki_export ( preg_replace ( '/SPKAC=/' , '' , $spkac ));
if ( $pubKey ) {
echo $pubKey ;
}
?>
Example #2 openssl_spki_export() example from <keygen>
Extracts the associated PEM formatted public key issued from the <keygen> element
<?php
$spkac = openssl_spki_export ( preg_replace ( '/SPKAC=/' , '' , $_POST [ 'spkac' ]));
if ( $spkac != NULL ) {
echo $spkac ;
} else {
echo "Extraction of pub key failed" ;
}
?>
<keygen name="spkac" challenge="challenge string" keytype="RSA">