namespace Signal.Test { class Curve25519 : Gee.TestCase { public Curve25519() { base("Curve25519"); add_test("agreement", test_curve25519_agreement); add_test("generate_public", test_curve25519_generate_public); add_test("random_agreements", test_curve25519_random_agreements); add_test("signature", test_curve25519_signature); } private Context global_context; public override void set_up() { try { global_context = new Context(); } catch (Error e) { fail_if_reached(); } } public override void tear_down() { global_context = null; } void test_curve25519_agreement() { try { uint8[] alicePublic = { 0x05, 0x1b, 0xb7, 0x59, 0x66, 0xf2, 0xe9, 0x3a, 0x36, 0x91, 0xdf, 0xff, 0x94, 0x2b, 0xb2, 0xa4, 0x66, 0xa1, 0xc0, 0x8b, 0x8d, 0x78, 0xca, 0x3f, 0x4d, 0x6d, 0xf8, 0xb8, 0xbf, 0xa2, 0xe4, 0xee, 0x28}; uint8[] alicePrivate = { 0xc8, 0x06, 0x43, 0x9d, 0xc9, 0xd2, 0xc4, 0x76, 0xff, 0xed, 0x8f, 0x25, 0x80, 0xc0, 0x88, 0x8d, 0x58, 0xab, 0x40, 0x6b, 0xf7, 0xae, 0x36, 0x98, 0x87, 0x90, 0x21, 0xb9, 0x6b, 0xb4, 0xbf, 0x59}; uint8[] bobPublic = { 0x05, 0x65, 0x36, 0x14, 0x99, 0x3d, 0x2b, 0x15, 0xee, 0x9e, 0x5f, 0xd3, 0xd8, 0x6c, 0xe7, 0x19, 0xef, 0x4e, 0xc1, 0xda, 0xae, 0x18, 0x86, 0xa8, 0x7b, 0x3f, 0x5f, 0xa9, 0x56, 0x5a, 0x27, 0xa2, 0x2f}; uint8[] bobPrivate = { 0xb0, 0x3b, 0x34, 0xc3, 0x3a, 0x1c, 0x44, 0xf2, 0x25, 0xb6, 0x62, 0xd2, 0xbf, 0x48, 0x59, 0xb8, 0x13, 0x54, 0x11, 0xfa, 0x7b, 0x03, 0x86, 0xd4, 0x5f, 0xb7, 0x5d, 0xc5, 0xb9, 0x1b, 0x44, 0x66}; uint8[] shared = { 0x32, 0x5f, 0x23, 0x93, 0x28, 0x94, 0x1c, 0xed, 0x6e, 0x67, 0x3b, 0x86, 0xba, 0x41, 0x01, 0x74, 0x48, 0xe9, 0x9b, 0x64, 0x9a, 0x9c, 0x38, 0x06, 0xc1, 0xdd, 0x7c, 0xa4, 0xc4, 0x77, 0xe6, 0x29}; ECPublicKey alice_public_key = global_context.decode_public_key(alicePublic); ECPrivateKey alice_private_key = global_context.decode_private_key(alicePrivate); ECPublicKey bob_public_key = global_context.decode_public_key(bobPublic); ECPrivateKey bob_private_key = global_context.decode_private_key(bobPrivate); uint8[] shared_one = calculate_agreement(alice_public_key, bob_private_key); uint8[] shared_two = calculate_agreement(bob_public_key, alice_private_key); fail_if_not_eq_int(shared_one.length, 32); fail_if_not_eq_int(shared_two.length, 32); fail_if_not_eq_uint8_arr(shared, shared_one); fail_if_not_eq_uint8_arr(shared_one, shared_two); } catch (Error e) { fail_if_reached(); } } void test_curve25519_generate_public() { try { uint8[] alicePublic = { 0x05, 0x1b, 0xb7, 0x59, 0x66, 0xf2, 0xe9, 0x3a, 0x36, 0x91, 0xdf, 0xff, 0x94, 0x2b, 0xb2, 0xa4, 0x66, 0xa1, 0xc0, 0x8b, 0x8d, 0x78, 0xca, 0x3f, 0x4d, 0x6d, 0xf8, 0xb8, 0xbf, 0xa2, 0xe4, 0xee, 0x28}; uint8[] alicePrivate = { 0xc8, 0x06, 0x43, 0x9d, 0xc9, 0xd2, 0xc4, 0x76, 0xff, 0xed, 0x8f, 0x25, 0x80, 0xc0, 0x88, 0x8d, 0x58, 0xab, 0x40, 0x6b, 0xf7, 0xae, 0x36, 0x98, 0x87, 0x90, 0x21, 0xb9, 0x6b, 0xb4, 0xbf, 0x59}; ECPrivateKey alice_private_key = global_context.decode_private_key(alicePrivate); ECPublicKey alice_expected_public_key = global_context.decode_public_key(alicePublic); ECPublicKey alice_public_key = generate_public_key(alice_private_key); fail_if_not_zero_int(alice_expected_public_key.compare(alice_public_key)); } catch (Error e) { fail_if_reached(); } } void test_curve25519_random_agreements() { try { ECKeyPair alice_key_pair = null; ECPublicKey alice_public_key = null; ECPrivateKey alice_private_key = null; ECKeyPair bob_key_pair = null; ECPublicKey bob_public_key = null; ECPrivateKey bob_private_key = null; uint8[] shared_alice = null; uint8[] shared_bob = null; for (int i = 0; i < 50; i++) { fail_if_null(alice_key_pair = global_context.generate_key_pair()); fail_if_null(alice_public_key = alice_key_pair.public); fail_if_null(alice_private_key = alice_key_pair.private); fail_if_null(bob_key_pair = global_context.generate_key_pair()); fail_if_null(bob_public_key = bob_key_pair.public); fail_if_null(bob_private_key = bob_key_pair.private); shared_alice = calculate_agreement(bob_public_key, alice_private_key); fail_if_not_eq_int(shared_alice.length, 32); shared_bob = calculate_agreement(alice_public_key, bob_private_key); fail_if_not_eq_int(shared_bob.length, 32); fail_if_not_eq_uint8_arr(shared_alice, shared_bob); } } catch (Error e) { fail_if_reached(); } } void test_curve25519_signature() { try { uint8[] aliceIdentityPrivate = { 0xc0, 0x97, 0x24, 0x84, 0x12, 0xe5, 0x8b, 0xf0, 0x5d, 0xf4, 0x87, 0x96, 0x82, 0x05, 0x13, 0x27, 0x94, 0x17, 0x8e, 0x36, 0x76, 0x37, 0xf5, 0x81, 0x8f, 0x81, 0xe0, 0xe6, 0xce, 0x73, 0xe8, 0x65}; uint8[] aliceIdentityPublic = { 0x05, 0xab, 0x7e, 0x71, 0x7d, 0x4a, 0x16, 0x3b, 0x7d, 0x9a, 0x1d, 0x80, 0x71, 0xdf, 0xe9, 0xdc, 0xf8, 0xcd, 0xcd, 0x1c, 0xea, 0x33, 0x39, 0xb6, 0x35, 0x6b, 0xe8, 0x4d, 0x88, 0x7e, 0x32, 0x2c, 0x64}; uint8[] aliceEphemeralPublic = { 0x05, 0xed, 0xce, 0x9d, 0x9c, 0x41, 0x5c, 0xa7, 0x8c, 0xb7, 0x25, 0x2e, 0x72, 0xc2, 0xc4, 0xa5, 0x54, 0xd3, 0xeb, 0x29, 0x48, 0x5a, 0x0e, 0x1d, 0x50, 0x31, 0x18, 0xd1, 0xa8, 0x2d, 0x99, 0xfb, 0x4a}; uint8[] aliceSignature = { 0x5d, 0xe8, 0x8c, 0xa9, 0xa8, 0x9b, 0x4a, 0x11, 0x5d, 0xa7, 0x91, 0x09, 0xc6, 0x7c, 0x9c, 0x74, 0x64, 0xa3, 0xe4, 0x18, 0x02, 0x74, 0xf1, 0xcb, 0x8c, 0x63, 0xc2, 0x98, 0x4e, 0x28, 0x6d, 0xfb, 0xed, 0xe8, 0x2d, 0xeb, 0x9d, 0xcd, 0x9f, 0xae, 0x0b, 0xfb, 0xb8, 0x21, 0x56, 0x9b, 0x3d, 0x90, 0x01, 0xbd, 0x81, 0x30, 0xcd, 0x11, 0xd4, 0x86, 0xce, 0xf0, 0x47, 0xbd, 0x60, 0xb8, 0x6e, 0x88}; global_context.decode_private_key(aliceIdentityPrivate); global_context.decode_public_key(aliceEphemeralPublic); ECPublicKey alice_public_key = global_context.decode_public_key(aliceIdentityPublic); fail_if(!verify_signature(alice_public_key, aliceEphemeralPublic, aliceSignature), "signature verification failed"); uint8[] modifiedSignature = new uint8[aliceSignature.length]; for (int i = 0; i < aliceSignature.length; i++) { Memory.copy(modifiedSignature, aliceSignature, aliceSignature.length); modifiedSignature[i] ^= 0x01; fail_if(verify_signature(alice_public_key, aliceEphemeralPublic, modifiedSignature), "invalid signature verification succeeded"); } } catch (Error e) { fail_if_reached(); } } } }