public function testWithBinaryFormsAndLargeIntegersAndOpenssl()
{
// skip this test if openssl DH support is not available
if (!function_exists('openssl_dh_compute_key')) {
$this->markTestSkipped('An openssl extension with Diffie-Hellman support is not available.');
}
DiffieHellman::useOpensslExtension(true);
$aliceOptions = array('prime' => '155172898181473697471232257763715539915724801966915404479707795314057629378541917580651227423698188993727816152646631438561595825688188889951272158842675419950341258706556549803580104870537681476726513255747040765857479291291572334510643245094715007229621094194349783925984760375594985848253359305585439638443', 'generator' => '2', 'private' => '99209314066572595236408569591967988557141249561494267486251808035535396332278620143536317681312712891672623072630995180324388841681491857745515696789091127409515009250358965816666146342049838178521379132153348139908016819196219448310107072632515749339055798122538615135104828702523796951800575031871051678091');
$bobOptions = array('prime' => '155172898181473697471232257763715539915724801966915404479707795314057629378541917580651227423698188993727816152646631438561595825688188889951272158842675419950341258706556549803580104870537681476726513255747040765857479291291572334510643245094715007229621094194349783925984760375594985848253359305585439638443', 'generator' => '2', 'private' => '33411735792639558625733635717892563612548180650402161151077478314841463707948899786103588912325634730410551946772752880177868972816963551821740386700076034213408153924692562543117963464733156600545484510833072427003474207064650714831083304497737160382097083356876078146231616972608703322302585471319261275664');
$alice = new DiffieHellman($aliceOptions['prime'], $aliceOptions['generator'], $aliceOptions['private']);
$bob = new DiffieHellman($bobOptions['prime'], $bobOptions['generator'], $bobOptions['private']);
$alice->generateKeys();
$bob->generateKeys();
$this->assertEquals('0DmJUe9dr02pAtVoGyLHdC+rfBU3mDCelKGPXRDFHofx6mFfN2gcZCmp/ab4ezDXfpIBOatpVdbn2fTNUGo64DtKE2WGTsZCl90RgrGUv8XW/4WDPXeE7g5u7KWHBG/LCE5+XsilE5P5/GIyqr9gsiudTmk+H/hiYZl9Smar9k0=', base64_encode($alice->getPublicKey(DiffieHellman::FORMAT_BINARY)));
$this->assertEquals('v8puCBaHdch0stxmkyS/sZvZHyB5f0AVkopAQ5wKSZIyEHHcGn7DXXH2u4WdCL+kMr8BcRpxRBJ0TDwfZPpu53nFNEjUd81WlfaKk95e4a/DC4dhlfBkQMebleobhedQPFAo7F9SkHN7uTLa/glxG+3T9DTb+ikcOVPoH3A1G6g=', base64_encode($bob->getPublicKey(DiffieHellman::FORMAT_BINARY)));
$aliceSecretKey = $alice->computeSecretKey($bob->getPublicKey(DiffieHellman::FORMAT_BINARY), DiffieHellman::FORMAT_BINARY, DiffieHellman::FORMAT_BINARY);
$bobSecretKey = $bob->computeSecretKey($alice->getPublicKey(DiffieHellman::FORMAT_BINARY), DiffieHellman::FORMAT_BINARY, DiffieHellman::FORMAT_BINARY);
// both Alice and Bob should now have the same secret key
$expectedSharedSecret = base64_decode('FAAkw7NN1+raX9K1+dR3nqX2LZcDYYuZH13lpasaDIM4/ZXqbzdgiHZ86SILN27BjmJObtNQG/SNHfhxMalLMtLv+v0JFte/6+pIvMG9tAoPFsVh2BAvBuNpLY5W5gusgQ2p4pvJK0wz9YJ8iFdOHEOnhzYuN7LS/YXx2rBOz0Q=');
$this->assertEquals($expectedSharedSecret, $aliceSecretKey);
$this->assertEquals($expectedSharedSecret, $bobSecretKey);
}
/**
* @return null|OpenIdDirectGenericErrorResponse|\openid\responses\OpenIdAssociationSessionResponse|OpenIdDiffieHellmanAssociationSessionResponse
*/
public function handle()
{
$response = null;
try {
$assoc_type = $this->current_request->getAssocType();
$session_type = $this->current_request->getSessionType();
//DH parameters
$public_prime = $this->current_request->getDHModulus();
//p
$public_generator = $this->current_request->getDHGen();
//g
//get (g ^ xa mod p) where xa is rp secret key
$rp_public_key = $this->current_request->getDHConsumerPublic();
//create association
$association = $this->association_service->addAssociation(AssociationFactory::getInstance()->buildSessionAssociation($assoc_type, $this->server_configuration_service->getConfigValue("Session.Association.Lifetime")));
$dh = new DiffieHellman($public_prime, $public_generator);
$dh->generateKeys();
//server public key (g ^ xb mod p ), where xb is server private key
// g ^ (xa * xb) mod p = (g ^ xa) ^ xb mod p = (g ^ xb) ^ xa mod p
$shared_secret = $dh->computeSecretKey($rp_public_key, DiffieHellman::FORMAT_NUMBER, DiffieHellman::FORMAT_BTWOC);
$hashed_shared_secret = OpenIdCryptoHelper::digest($session_type, $shared_secret);
$server_public_key = base64_encode($dh->getPublicKey(DiffieHellman::FORMAT_BTWOC));
$enc_mac_key = base64_encode($association->getSecret() ^ $hashed_shared_secret);
$response = new OpenIdDiffieHellmanAssociationSessionResponse($association->getHandle(), $session_type, $assoc_type, $association->getLifetime(), $server_public_key, $enc_mac_key);
} catch (InvalidDHParam $exDH) {
$response = new OpenIdDirectGenericErrorResponse($exDH->getMessage());
$this->log_service->error($exDH);
} catch (InvalidArgumentException $exDH1) {
$response = new OpenIdDirectGenericErrorResponse($exDH1->getMessage());
$this->log_service->error($exDH1);
} catch (RuntimeException $exDH2) {
$response = new OpenIdDirectGenericErrorResponse($exDH2->getMessage());
$this->log_service->error($exDH2);
}
return $response;
}
public function testWithBinaryFormsAndLargeIntegersAndOpenssl()
{
// skip this test if openssl DH support is not available
if (!function_exists('openssl_dh_compute_key')) {
$this->markTestSkipped(
'An openssl extension with Diffie-Hellman support is not available.'
);
}
DiffieHellman::useOpensslExtension(true);
$aliceOptions = array(
'prime' => '155172898181473697471232257763715539915724801966915404479707795314057629378541917580651227423698188993727816152646631438561595825688188889951272158842675419950341258706556549803580104870537681476726513255747040765857479291291572334510643245094715007229621094194349783925984760375594985848253359305585439638443',
'generator'=> '2',
'private' => '99209314066572595236408569591967988557141249561494267486251808035535396332278620143536317681312712891672623072630995180324388841681491857745515696789091127409515009250358965816666146342049838178521379132153348139908016819196219448310107072632515749339055798122538615135104828702523796951800575031871051678091'
);
$bobOptions = array(
'prime' => '155172898181473697471232257763715539915724801966915404479707795314057629378541917580651227423698188993727816152646631438561595825688188889951272158842675419950341258706556549803580104870537681476726513255747040765857479291291572334510643245094715007229621094194349783925984760375594985848253359305585439638443',
'generator'=> '2',
'private' => '33411735792639558625733635717892563612548180650402161151077478314841463707948899786103588912325634730410551946772752880177868972816963551821740386700076034213408153924692562543117963464733156600545484510833072427003474207064650714831083304497737160382097083356876078146231616972608703322302585471319261275664'
);
$alice = new DiffieHellman($aliceOptions['prime'], $aliceOptions['generator'], $aliceOptions['private']);
$bob = new DiffieHellman($bobOptions['prime'], $bobOptions['generator'], $bobOptions['private']);
$alice->generateKeys();
$bob->generateKeys();
$this->assertEquals('ANA5iVHvXa9NqQLVaBsix3Qvq3wVN5gwnpShj10QxR6H8ephXzdoHGQpqf2m+Hsw136SATmraVXW59n0zVBqOuA7ShNlhk7GQpfdEYKxlL/F1v+Fgz13hO4ObuylhwRvywhOfl7IpROT+fxiMqq/YLIrnU5pPh/4YmGZfUpmq/ZN',
base64_encode($alice->getPublicKey(DiffieHellman::FORMAT_BINARY)));
$this->assertEquals('AL/KbggWh3XIdLLcZpMkv7Gb2R8geX9AFZKKQEOcCkmSMhBx3Bp+w11x9ruFnQi/pDK/AXEacUQSdEw8H2T6bud5xTRI1HfNVpX2ipPeXuGvwwuHYZXwZEDHm5XqG4XnUDxQKOxfUpBze7ky2v4JcRvt0/Q02/opHDlT6B9wNRuo',
base64_encode($bob->getPublicKey(DiffieHellman::FORMAT_BINARY)));
$aliceSecretKey = $alice->computeSecretKey($bob->getPublicKey(DiffieHellman::FORMAT_BINARY), DiffieHellman::FORMAT_BINARY,
DiffieHellman::FORMAT_BINARY);
$bobSecretKey = $bob->computeSecretKey($alice->getPublicKey(DiffieHellman::FORMAT_BINARY), DiffieHellman::FORMAT_BINARY,
DiffieHellman::FORMAT_BINARY);
// both Alice and Bob should now have the same secret key
$expectedSharedSecret = base64_decode('FAAkw7NN1+raX9K1+dR3nqX2LZcDYYuZH13lpasaDIM4/ZXqbzdgiHZ86SILN27BjmJObtNQG/SNHfhxMalLMtLv+v0JFte/6+pIvMG9tAoPFsVh2BAvBuNpLY5W5gusgQ2p4pvJK0wz9YJ8iFdOHEOnhzYuN7LS/YXx2rBOz0Q=');
$this->assertEquals($expectedSharedSecret, $aliceSecretKey);
$this->assertEquals($expectedSharedSecret, $bobSecretKey);
}