OPENSSL_SPKI_EXPORT_CHALLENGE(3) 1 OPENSSL_SPKI_EXPORT_CHALLENGE(3)
openssl_spki_export_challenge - Exports the challenge assoicated with a signed public key and challenge
SYNOPSIS
string openssl_spki_export_challenge (string &$spkac)
DESCRIPTION
Exports challenge from encoded signed public key and challenge
PARAMETERS
o $spkac
- Expects a valid signed public key and challenge
RETURN VALUES
Returns the associated challenge string or NULL on failure.
ERRORS
/EXCEPTIONS
Emits an E_WARNING level error if an invalid argument is passed via the $spkac parameter.
EXAMPLES
Example #1
openssl_spki_export_challenge(3) example
Extracts the associated challenge string or NULL on failure.
<?php
$pkey = openssl_pkey_new('secret password');
$spkac = openssl_spki_new($pkey, 'challenge string');
$challenge = openssl_spki_export_challenge(preg_replace('/SPKAC=/', '', $spkac));
?>
Example #2
openssl_spki_export_challenge(3) example from <keygen>
Extracts the associated challenge string issued from the <keygen> element
<?php
$challenge = openssl_spki_export_challenge(preg_replace('/SPKAC=/', '', $_POST['spkac']));
?>
<keygen name="spkac" challenge="challenge string" keytype="RSA">
SEE ALSO
openssl_spki_new(3), openssl_spki_verify(3), openssl_spki_export(3), openssl_md_method(3), openssl_csr_new(3), openssl_csr_sign(3).
PHP Documentation Group OPENSSL_SPKI_EXPORT_CHALLENGE(3)