openssl_spki_export

(PHP 5 >= 5.6.0, PHP 7, PHP 8)

openssl_spki_exportExports a valid PEM formatted public key signed public key and challenge

Description

openssl_spki_export(string $spki): string|false

Exports PEM formatted public key from encoded signed public key and challenge

Parameters

spki

Expects a valid signed public key and challenge

Return Values

Returns the associated PEM formatted public key or false on failure.

Errors/Exceptions

Emits an E_WARNING level error if an invalid argument is passed via the spki parameter.

Examples

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">

See Also