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Add tests to check that an EdDSAEngine object can be reused with the same key

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This commit is contained in:
str4d
2016-02-28 03:37:03 +00:00
parent 80860232d7
commit 6e7f015d4b
1 changed files with 43 additions and 6 deletions
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49
core/java/test/junit/net/i2p/crypto/eddsa/EdDSAEngineTest.java
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@ -24,9 +24,10 @@ import org.junit.rules.ExpectedException;
* *
*/ */
public class EdDSAEngineTest { public class EdDSAEngineTest {
static final byte[] ZERO_SEED = Utils.hexToBytes("0000000000000000000000000000000000000000000000000000000000000000"); static final byte[] TEST_SEED = Utils.hexToBytes("0000000000000000000000000000000000000000000000000000000000000000");
static final byte[] ZERO_PK = Utils.hexToBytes("3b6a27bcceb6a42d62a3a8d02a6f0d73653215771de243a63ac048a18b59da29"); static final byte[] TEST_PK = Utils.hexToBytes("3b6a27bcceb6a42d62a3a8d02a6f0d73653215771de243a63ac048a18b59da29");
static final byte[] ZERO_MSG_SIG = Utils.hexToBytes("94825896c7075c31bcb81f06dba2bdcd9dcf16e79288d4b9f87c248215c8468d475f429f3de3b4a2cf67fe17077ae19686020364d6d4fa7a0174bab4a123ba0f"); static final byte[] TEST_MSG = "This is a secret message".getBytes(Charset.forName("UTF-8"));
static final byte[] TEST_MSG_SIG = Utils.hexToBytes("94825896c7075c31bcb81f06dba2bdcd9dcf16e79288d4b9f87c248215c8468d475f429f3de3b4a2cf67fe17077ae19686020364d6d4fa7a0174bab4a123ba0f");
@Rule @Rule
public ExpectedException exception = ExpectedException.none(); public ExpectedException exception = ExpectedException.none();
@ -75,16 +76,52 @@ public class EdDSAEngineTest {
//Signature sgr = Signature.getInstance("EdDSA", "I2P"); //Signature sgr = Signature.getInstance("EdDSA", "I2P");
Signature sgr = new EdDSAEngine(MessageDigest.getInstance("SHA-512")); Signature sgr = new EdDSAEngine(MessageDigest.getInstance("SHA-512"));
EdDSAPublicKeySpec pubKey = new EdDSAPublicKeySpec(ZERO_PK, EdDSAPublicKeySpec pubKey = new EdDSAPublicKeySpec(TEST_PK,
EdDSANamedCurveTable.getByName("ed25519-sha-512")); EdDSANamedCurveTable.getByName("ed25519-sha-512"));
PublicKey vKey = new EdDSAPublicKey(pubKey); PublicKey vKey = new EdDSAPublicKey(pubKey);
sgr.initVerify(vKey); sgr.initVerify(vKey);
byte[] message = "This is a secret message".getBytes(Charset.forName("UTF-8")); sgr.update(TEST_MSG);
sgr.update(message);
exception.expect(SignatureException.class); exception.expect(SignatureException.class);
exception.expectMessage("signature length is wrong"); exception.expectMessage("signature length is wrong");
sgr.verify(new byte[] {0}); sgr.verify(new byte[] {0});
} }
@Test
public void testSignResetsForReuse() throws Exception {
Signature sgr = new EdDSAEngine(MessageDigest.getInstance("SHA-512"));
EdDSAParameterSpec spec = EdDSANamedCurveTable.getByName("ed25519-sha-512");
EdDSAPrivateKeySpec privKey = new EdDSAPrivateKeySpec(TEST_SEED, spec);
PrivateKey sKey = new EdDSAPrivateKey(privKey);
sgr.initSign(sKey);
// First usage
sgr.update(new byte[] {0});
sgr.sign();
// Second usage
sgr.update(TEST_MSG);
assertThat("Second sign failed", sgr.sign(), is(equalTo(TEST_MSG_SIG)));
}
@Test
public void testVerifyResetsForReuse() throws Exception {
//Signature sgr = Signature.getInstance("EdDSA", "I2P");
Signature sgr = new EdDSAEngine(MessageDigest.getInstance("SHA-512"));
EdDSAPublicKeySpec pubKey = new EdDSAPublicKeySpec(TEST_PK,
EdDSANamedCurveTable.getByName("ed25519-sha-512"));
PublicKey vKey = new EdDSAPublicKey(pubKey);
sgr.initVerify(vKey);
// First usage
sgr.update(new byte[] {0});
sgr.verify(TEST_MSG_SIG);
// Second usage
sgr.update(TEST_MSG);
assertThat("Second verify failed", sgr.verify(TEST_MSG_SIG), is(true));
}
} }