README

这是一个 Curve25519 Diffie-Hellman 函数的纯 PHP 实现。

这个库被编写为高性能（相对于 PHP），但不一定美观。显然，它的性能远不及原生实现。

用法

$mySecret = random_bytes(32);
$myPublic = \Curve25519\publicKey($mySecret);
$shared   = \Curve25519\sharedKey($mySecret, $theirPublic);

多方共享密钥

当多于两个通信方时，需要交换中间值，以便每个通信方可以计算出共同的共享密钥。

$alicePrivate = str_repeat('a', 32);
$bobPrivate   = str_repeat('b', 32);
$carolPrivate = str_repeat('c', 32);

$alicePublic = \Curve25519\publicKey($alicePrivate); // Send to Bob
$bobPublic   = \Curve25519\publicKey($bobPrivate);   // Send to Carol
$carolPublic = \Curve25519\publicKey($carolPrivate); // Send to Alice

$aliceCarolShared = \Curve25519\sharedKey($alicePrivate, $carolPublic); // Send to Bob
$bobAliceShared   = \Curve25519\sharedKey($bobPrivate,   $alicePublic); // Send to Carol
$carolBobShared   = \Curve25519\sharedKey($carolPrivate, $bobPublic);   // Send to Alice

$aliceShared = \Curve25519\sharedKey($alicePrivate, $carolBobShared);
$bobShared   = \Curve25519\sharedKey($bobPrivate,   $aliceCarolShared);
$carolShared = \Curve25519\sharedKey($carolPrivate, $bobAliceShared);

// An adversary potentially observed f(a), f(b), f(c), f(ab), f(ac), and f(bc),
// whereas each party solved for f(abc)
var_dump($aliceShared === $bobShared && $bobShared === $carolShared);

leigh / curve25519

维护者

详细信息

README

用法

多方共享密钥