Diffie-Hellman密钥交换

//header('Content-Type:text/html;charset=utf-8');
//include Diffie Hellman functions
require_once 'Crypt/DiffieHellman.php';

//set the required options for two subjects
$subject_1 = array('prime'=>'1234567', 'generator'=>'7', 'private'=>'123123455454545');

$subject_2 = array('prime'=>'1234567', 'generator'=>'7', 'private'=>'1123231');

//apply Diffie Hellman algorithm
$subject_1_GK = new Crypt_DiffieHellman($subject_1['prime'], $subject_1['generator'], $subject_1['private']);

$subject_2_GK = new Crypt_DiffieHellman($subject_2['prime'], $subject_2['generator'],$subject_2['private']);

//generate keys
$subject_1_GK->generateKeys();

$subject_2_GK->generateKeys();

//compute the secret keys
$subject_1_SK = $subject_1_GK->computeSecretKey($subject_2_GK->getPublicKey())->getSharedSecretKey();

$subject_2_SK = $subject_2_GK->computeSecretKey($subject_1_GK->getPublicKey())->getSharedSecretKey();

//displaying the secret keys
echo('Subject_1_SK:'.$subject_1_SK.'<br />');

echo('Subject_2_SK:'.$subject_2_SK);