Php/docs/function.openssl-spki-export
openssl_spki_export
(PHP 5 >= 5.6.0, PHP 7)
openssl_spki_export — Exports a valid PEM formatted public key signed public key and challenge
Description
openssl_spki_export
( string &$spkac
) : string
Exports PEM formatted public key from encoded signed public key and challenge
Parameters
spkac
- Expects a valid signed public key and challenge
Return Values
Returns the associated PEM formatted public key or NULL on failure.
Errors/Exceptions
Emits an E_WARNING
level error if an invalid argument
is passed via the spkac
parameter.
Examples
Example #1 openssl_spki_export() example
Extracts the associated PEM formatted public key or NULL on failure.
<?php$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
- openssl_spki_new() - Generate a new signed public key and challenge
- openssl_spki_verify() - Verifies a signed public key and challenge
- openssl_spki_export_challenge() - Exports the challenge associated with a signed public key and challenge
- openssl_get_md_methods() - Gets available digest methods
- openssl_csr_new() - Generates a CSR
- openssl_csr_sign() - Sign a CSR with another certificate (or itself) and generate a certificate