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Code Issues Projects Releases Wiki Activity

Use a constant for the tag size.

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This commit is contained in:
akwizgran
2011-08-12 14:26:56 +02:00
parent f0cf825ca9
commit 68b4760dfa
11 changed files with 43 additions and 33 deletions
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12
test/net/sf/briar/crypto/SharedSecretTest.java
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@@ -14,22 +14,22 @@ public class SharedSecretTest extends TestCase {
Random random = new Random();
byte[] secret = new byte[40];
random.nextBytes(secret);
secret[16] = (byte) 0;
secret[SharedSecret.IV_BYTES] = (byte) 0;
SharedSecret s = new SharedSecret(secret);
assertTrue(Arrays.equals(secret, s.getBytes()));
secret[16] = (byte) 1;
secret[SharedSecret.IV_BYTES] = (byte) 1;
s = new SharedSecret(secret);
assertTrue(Arrays.equals(secret, s.getBytes()));
// The Alice flag must be either 0 or 1
secret[16] = (byte) 2;
secret[SharedSecret.IV_BYTES] = (byte) 2;
try {
s = new SharedSecret(secret);
fail();
} catch(IllegalArgumentException expected) {}
// The secret must be at least 18 bytes long
secret = new byte[17];
// The ciphertext must be at least 1 byte long
secret = new byte[SharedSecret.IV_BYTES + 1];
random.nextBytes(secret);
secret[16] = (byte) 0;
secret[SharedSecret.IV_BYTES] = (byte) 0;
try {
s = new SharedSecret(secret);
fail();

2
test/net/sf/briar/transport/ConnectionRecogniserImplTest.java
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@@ -53,7 +53,7 @@ public class ConnectionRecogniserImplTest extends TestCase {
}});
final ConnectionRecogniserImpl c =
new ConnectionRecogniserImpl(transportId, crypto, db);
assertNull(c.acceptConnection(new byte[16]));
assertNull(c.acceptConnection(new byte[Constants.TAG_BYTES]));
context.assertIsSatisfied();
}

13
test/net/sf/briar/transport/PacketEncrypterImplTest.java
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@@ -36,7 +36,7 @@ public class PacketEncrypterImplTest extends TestCase {
ByteArrayOutputStream out = new ByteArrayOutputStream();
PacketEncrypter p = new PacketEncrypterImpl(out, tagCipher,
packetCipher, tagKey, packetKey);
p.writeTag(new byte[16]);
p.writeTag(new byte[Constants.TAG_BYTES]);
p.getOutputStream().write((byte) 0);
p.finishPacket();
assertEquals(17, out.toByteArray().length);
@@ -44,7 +44,7 @@ public class PacketEncrypterImplTest extends TestCase {
@Test
public void testEncryption() throws Exception {
byte[] tag = new byte[16];
byte[] tag = new byte[Constants.TAG_BYTES];
byte[] packet = new byte[123];
// Calculate the expected encrypted tag
tagCipher.init(Cipher.ENCRYPT_MODE, tagKey);
@@ -63,14 +63,15 @@ public class PacketEncrypterImplTest extends TestCase {
p.getOutputStream().write(packet);
p.finishPacket();
byte[] ciphertext = out.toByteArray();
assertEquals(16 + packet.length, ciphertext.length);
assertEquals(Constants.TAG_BYTES + packet.length, ciphertext.length);
// Check the tag
byte[] actualTag = new byte[16];
System.arraycopy(ciphertext, 0, actualTag, 0, 16);
byte[] actualTag = new byte[Constants.TAG_BYTES];
System.arraycopy(ciphertext, 0, actualTag, 0, Constants.TAG_BYTES);
assertTrue(Arrays.equals(expectedTag, actualTag));
// Check the packet
byte[] actualPacket = new byte[packet.length];
System.arraycopy(ciphertext, 16, actualPacket, 0, actualPacket.length);
System.arraycopy(ciphertext, Constants.TAG_BYTES, actualPacket, 0,
actualPacket.length);
assertTrue(Arrays.equals(expectedPacket, actualPacket));
}
}

26
test/net/sf/briar/transport/PacketWriterImplTest.java
View File

@@ -36,8 +36,9 @@ public class PacketWriterImplTest extends TestCase {
PacketEncrypter e = new NullPacketEncrypter(out);
PacketWriter p = new PacketWriterImpl(e, mac, 0, 0L);
p.getOutputStream().write(0);
// There should be 16 zero bytes for the tag, 1 for the byte written
assertTrue(Arrays.equals(new byte[17], out.toByteArray()));
// There should be TAG_BYTES bytes for the tag, 1 byte for the write
assertTrue(Arrays.equals(new byte[Constants.TAG_BYTES + 1],
out.toByteArray()));
}
@Test
@@ -93,6 +94,7 @@ public class PacketWriterImplTest extends TestCase {
+ "00000000" // 32 bits for the packet number
+ "00000000" // 32 bits for the block number
);
assertEquals(Constants.TAG_BYTES, expectedTag.length);
byte[] expectedTag1 = StringUtils.fromHexString(
"0000" // 16 bits reserved
+ "F00D" // 16 bits for the transport ID
@@ -100,6 +102,7 @@ public class PacketWriterImplTest extends TestCase {
+ "00000001" // 32 bits for the packet number
+ "00000000" // 32 bits for the block number
);
assertEquals(Constants.TAG_BYTES, expectedTag1.length);
// Calculate what the MAC on the first packet should be
mac.update(expectedTag);
mac.update((byte) 0);
@@ -119,24 +122,27 @@ public class PacketWriterImplTest extends TestCase {
p.getOutputStream().write(0);
p.nextPacket();
byte[] written = out.toByteArray();
assertEquals(17 + expectedMac.length + 17 + expectedMac1.length,
assertEquals(Constants.TAG_BYTES + 1 + expectedMac.length
+ Constants.TAG_BYTES + 1 + expectedMac1.length,
written.length);
// Check the first packet's tag
byte[] actualTag = new byte[16];
System.arraycopy(written, 0, actualTag, 0, 16);
byte[] actualTag = new byte[Constants.TAG_BYTES];
System.arraycopy(written, 0, actualTag, 0, Constants.TAG_BYTES);
assertTrue(Arrays.equals(expectedTag, actualTag));
// Check the first packet's MAC
byte[] actualMac = new byte[expectedMac.length];
System.arraycopy(written, 17, actualMac, 0, actualMac.length);
System.arraycopy(written, Constants.TAG_BYTES + 1, actualMac, 0,
actualMac.length);
assertTrue(Arrays.equals(expectedMac, actualMac));
// Check the second packet's tag
byte[] actualTag1 = new byte[16];
System.arraycopy(written, 17 + expectedMac.length, actualTag1, 0, 16);
byte[] actualTag1 = new byte[Constants.TAG_BYTES];
System.arraycopy(written, Constants.TAG_BYTES + 1 + expectedMac.length,
actualTag1, 0, Constants.TAG_BYTES);
assertTrue(Arrays.equals(expectedTag1, actualTag1));
// Check the second packet's MAC
byte[] actualMac1 = new byte[expectedMac1.length];
System.arraycopy(written, 17 + expectedMac.length + 17, actualMac1, 0,
actualMac1.length);
System.arraycopy(written, Constants.TAG_BYTES + 1 + expectedMac.length
+ Constants.TAG_BYTES + 1, actualMac1, 0, actualMac1.length);
assertTrue(Arrays.equals(expectedMac1, actualMac1));
}