OPENSSL_SPKI_EXPORT(3)							 1						    OPENSSL_SPKI_EXPORT(3)

openssl_spki_export - Exports a valid PEM formatted public key signed public key and challenge

SYNOPSIS

       string openssl_spki_export (string  &$spkac)

DESCRIPTION

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

PARAMETERS

	      o $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(3) 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(3) 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(3),	 openssl_spki_verify(3),      openssl_spki_export_challenge(3),      openssl_md_method(3),     openssl_csr_new(3),
       openssl_csr_sign(3).

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