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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)

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