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Add triple Diffie-Hellman key agreement.

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This commit is contained in:
akwizgran
2019-03-15 14:04:16 +00:00
parent 84060a57da
commit 44d2526997
3 changed files with 73 additions and 9 deletions
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16
bramble-core/src/test/java/org/briarproject/bramble/crypto/KeyAgreementTest.java
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@@ -59,6 +59,22 @@ public class KeyAgreementTest extends BrambleTestCase {
assertArrayEquals(aShared.getBytes(), bShared.getBytes());
}
@Test
public void testDerivesStaticEphemeralSharedSecret() throws Exception {
String label = getRandomString(123);
KeyPair aStatic = crypto.generateAgreementKeyPair();
KeyPair aEphemeral = crypto.generateAgreementKeyPair();
KeyPair bStatic = crypto.generateAgreementKeyPair();
KeyPair bEphemeral = crypto.generateAgreementKeyPair();
SecretKey aShared = crypto.deriveSharedSecret(label,
bStatic.getPublic(), bEphemeral.getPublic(), aStatic,
aEphemeral, true, inputs);
SecretKey bShared = crypto.deriveSharedSecret(label,
aStatic.getPublic(), aEphemeral.getPublic(), bStatic,
bEphemeral, false, inputs);
assertArrayEquals(aShared.getBytes(), bShared.getBytes());
}
@Test(expected = GeneralSecurityException.class)
public void testRejectsInvalidPublicKey() throws Exception {
KeyPair keyPair = crypto.generateAgreementKeyPair();