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Use WhisperSystems Curve25519 library.

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This commit is contained in:
akwizgran
2017-12-07 17:06:58 +00:00
parent 2a7bdcd270
commit ad241a14e3
2 changed files with 23 additions and 21 deletions
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42
bramble-core/src/test/java/org/briarproject/bramble/crypto/EllipticCurvePerformanceTest.java
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@@ -12,7 +12,6 @@ import org.spongycastle.crypto.Digest;
import org.spongycastle.crypto.agreement.ECDHBasicAgreement;
import org.spongycastle.crypto.agreement.ECDHCBasicAgreement;
import org.spongycastle.crypto.digests.Blake2bDigest;
import org.spongycastle.crypto.ec.CustomNamedCurves;
import org.spongycastle.crypto.generators.ECKeyPairGenerator;
import org.spongycastle.crypto.params.ECDomainParameters;
import org.spongycastle.crypto.params.ECKeyGenerationParameters;
@@ -24,6 +23,8 @@ import org.spongycastle.crypto.signers.HMacDSAKCalculator;
import org.spongycastle.math.ec.ECCurve;
import org.spongycastle.math.ec.ECPoint;
import org.spongycastle.math.ec.MontgomeryLadderMultiplier;
import org.whispersystems.curve25519.Curve25519;
import org.whispersystems.curve25519.Curve25519KeyPair;
import java.math.BigInteger;
import java.security.GeneralSecurityException;
@@ -65,11 +66,8 @@ public class EllipticCurvePerformanceTest {
runTest(name + " constant", constantTime(params));
}
runTest("ours", PARAMETERS);
ECDomainParameters params =
convertParams(CustomNamedCurves.getByName("curve25519"));
runAgreementTest("curve25519 default", params);
runAgreementTest("curve25519 constant", constantTime(params));
runEdTest();
runCurve25519Test();
runEd25519Test();
}
private static void runTest(String name, ECDomainParameters params) {
@@ -136,22 +134,24 @@ public class EllipticCurvePerformanceTest {
else return new ECDHBasicAgreement();
}
private static void runAgreementTest(String name,
ECDomainParameters params) {
// Generate two key pairs using the given parameters
ECKeyPairGenerator generator = new ECKeyPairGenerator();
generator.init(new ECKeyGenerationParameters(params, random));
AsymmetricCipherKeyPair keyPair1 = generator.generateKeyPair();
AsymmetricCipherKeyPair keyPair2 = generator.generateKeyPair();
// Time some ECDH and ECDHC key agreements
long agreementMedian = runAgreementTest(keyPair1, keyPair2, false);
long agreementWithCofactorMedian =
runAgreementTest(keyPair1, keyPair2, true);
System.out.println(String.format("%s: %,d %,d N/A N/A", name,
agreementMedian, agreementWithCofactorMedian));
private static void runCurve25519Test() {
Curve25519 curve25519 = Curve25519.getInstance("java");
Curve25519KeyPair keyPair1 = curve25519.generateKeyPair();
Curve25519KeyPair keyPair2 = curve25519.generateKeyPair();
// Time some key agreements
List<Long> samples = new ArrayList<>();
for (int i = 0; i < SAMPLES; i++) {
long start = System.nanoTime();
curve25519.calculateAgreement(keyPair1.getPublicKey(),
keyPair2.getPrivateKey());
samples.add(System.nanoTime() - start);
}
long agreementMedian = median(samples);
System.out.println(String.format("Curve25519: %,d - - -",
agreementMedian));
}
private static void runEdTest() throws GeneralSecurityException {
private static void runEd25519Test() throws GeneralSecurityException {
KeyPair keyPair = new KeyPairGenerator().generateKeyPair();
// Time some signatures
List<Long> samples = new ArrayList<>();
@@ -179,7 +179,7 @@ public class EllipticCurvePerformanceTest {
samples.add(System.nanoTime() - start);
}
long verificationMedian = median(samples);
System.out.println(String.format("Ed25519: N/A %,d %,d",
System.out.println(String.format("Ed25519: - - %,d %,d",
signatureMedian, verificationMedian));
}