OPENSSL_SPKI_VERIFY(3)							 1						    OPENSSL_SPKI_VERIFY(3)

openssl_spki_verify - Verifies a signed public key and challenge

SYNOPSIS

       string openssl_spki_verify (string  &$spkac)

DESCRIPTION

	Validates the supplied signed public key and challenge

PARAMETERS

	      o $spkac
		- Expects a valid signed public key and challenge

RETURN VALUES

	Returns a boolean on success or failure.

ERRORS
/EXCEPTIONS
	Emits an E_WARNING level error if an invalid argument is passed via the $spkac parameter.

EXAMPLES

       Example #1

	      openssl_spki_verify(3) example

	       Validates an existing signed public key and challenge

	      <?php
	      $pkey = openssl_pkey_new('secret password');
	      $spkac = openssl_spki_new($pkey, 'challenge string');

	      if (openssl_spki_verify(preg_replace('/SPKAC=/', '', $spkac))) {
		  echo $spkac;
	      } else {
		  echo "SPKAC validation failed";
	      }
	      ?>

       Example #2

	      openssl_spki_verify(3) example from <keygen>

	       Validates an existing signed public key and challenge issued from the <keygen> element

	      <?php
	      if (openssl_spki_verify(preg_replace('/SPKAC=/', '', $_POST['spkac']))) {
		  echo $spkac;
	      } else {
		  echo "SPKAC validation failed";
	      }
	      ?>
	      <keygen name="spkac" challenge="challenge string" keytype="RSA">

SEE ALSO

       openssl_spki_new(3),	 openssl_spki_export_challenge(3),	openssl_spki_export(3),      openssl_md_method(3),     openssl_csr_new(3),
       openssl_csr_sign(3).

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