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c-kzg-4844
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Add method to load trusted setup from a resource (#135) 

* Add method to load trusted setup from a resource
* Do not try to reuse the same temp dir
* Fix test, loading the correct trusted setup for the preset
This commit is contained in:
Fabio Di Fabio 2023-02-15 19:18:43 +01:00 committed by GitHub
parent e93110903e
commit 8c3dc2df41
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
4 changed files with 4288 additions and 13 deletions
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25
bindings/java/src/main/java/ethereum/ckzg4844/CKZG4844JNI.java
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@ -106,6 +106,30 @@ public class CKZG4844JNI {
*/ */
public static native void loadTrustedSetup(byte[] g1, long g1Count, byte[] g2, long g2Count); public static native void loadTrustedSetup(byte[] g1, long g1Count, byte[] g2, long g2Count);
/**
* An alternative to {@link #loadTrustedSetup(String)}. Loads the trusted setup from a resource.
*
* @param resource the resource name that contains the trusted setup
* @param clazz the class to use to get the resource
* @throws CKZGException if there is a crypto error
* @throws IllegalArgumentException if the resource does not exist
*/
public static void loadTrustedSetupFromResource(String resource, Class clazz) {
InputStream is = clazz.getResourceAsStream(resource);
if (is == null) {
throw new IllegalArgumentException("Resource " + resource + " does not exist.");
}
try (is) {
Path jniWillLoadFrom = Files.createTempFile("kzg-trusted-setup", ".txt");
jniWillLoadFrom.toFile().deleteOnExit();
Files.copy(is, jniWillLoadFrom, StandardCopyOption.REPLACE_EXISTING);
loadTrustedSetup(jniWillLoadFrom.toString());
} catch (IOException ex) {
throw new UncheckedIOException("Error loading trusted setup from resource " + resource, ex);
}
}
/** /**
* Free the current trusted setup. This method will throw an exception if no trusted setup has * Free the current trusted setup. This method will throw an exception if no trusted setup has
* been loaded. * been loaded.
@ -167,5 +191,4 @@ public class CKZG4844JNI {
*/ */
public static native boolean verifyKzgProof(byte[] commitment_bytes, byte[] z_bytes, public static native boolean verifyKzgProof(byte[] commitment_bytes, byte[] z_bytes,
byte[] y_bytes, byte[] proof_bytes); byte[] y_bytes, byte[] proof_bytes);
} }

42
bindings/java/src/test/java/ethereum/ckzg4844/CKZG4844JNITest.java
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@ -13,16 +13,24 @@ import java.util.stream.IntStream;
import java.util.stream.Stream; import java.util.stream.Stream;
import org.junit.jupiter.api.Test; import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest; import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.EnumSource;
import org.junit.jupiter.params.provider.MethodSource; import org.junit.jupiter.params.provider.MethodSource;
import org.junit.jupiter.params.provider.ValueSource;
public class CKZG4844JNITest { public class CKZG4844JNITest {
private enum TrustedSetupSource {
FILE,
PARAMETERS,
RESOURCE;
}
private static final Preset PRESET; private static final Preset PRESET;
private static final Map<Preset, String> TRUSTED_SETUP_FILE_BY_PRESET = Map.of(Preset.MAINNET, private static final Map<Preset, String> TRUSTED_SETUP_FILE_BY_PRESET = Map.of(Preset.MAINNET,
"../../src/trusted_setup.txt", Preset.MINIMAL, "../../src/trusted_setup_4.txt"); "../../src/trusted_setup.txt", Preset.MINIMAL, "../../src/trusted_setup_4.txt");
private static final Map<Preset, String> TRUSTED_SETUP_RESOURCE_BY_PRESET = Map.of(Preset.MAINNET,
"/test-vectors/trusted_setup.txt", Preset.MINIMAL, "/test-vectors/trusted_setup_4.txt");
static { static {
PRESET = Optional.ofNullable(System.getenv("PRESET")).map(String::toUpperCase) PRESET = Optional.ofNullable(System.getenv("PRESET")).map(String::toUpperCase)
.map(Preset::valueOf).orElse(Preset.MAINNET); .map(Preset::valueOf).orElse(Preset.MAINNET);
@ -37,10 +45,10 @@ public class CKZG4844JNITest {
} }
@ParameterizedTest @ParameterizedTest
@ValueSource(booleans = {true, false}) @EnumSource(TrustedSetupSource.class)
public void computesAndVerifiesProofs(final boolean useTrustedSetupFile) { public void computesAndVerifiesProofs(final TrustedSetupSource trustedSetupSource) {
loadTrustedSetup(useTrustedSetupFile); loadTrustedSetup(trustedSetupSource);
final int count = 3; final int count = 3;
@ -208,14 +216,20 @@ public class CKZG4844JNITest {
assertEquals("Trusted Setup is not loaded.", exception.getMessage()); assertEquals("Trusted Setup is not loaded.", exception.getMessage());
} }
private static void loadTrustedSetup(final boolean useFile) { private static void loadTrustedSetup(final TrustedSetupSource trustedSetupSource) {
if (useFile) { switch (trustedSetupSource) {
loadTrustedSetup(); case FILE:
} else { loadTrustedSetup();
final LoadTrustedSetupParameters parameters = TestUtils.createLoadTrustedSetupParameters( break;
TRUSTED_SETUP_FILE_BY_PRESET.get(PRESET)); case PARAMETERS:
CKZG4844JNI.loadTrustedSetup(parameters.getG1(), parameters.getG1Count(), parameters.getG2(), final LoadTrustedSetupParameters parameters = TestUtils.createLoadTrustedSetupParameters(
parameters.getG2Count()); TRUSTED_SETUP_FILE_BY_PRESET.get(PRESET));
CKZG4844JNI.loadTrustedSetup(parameters.getG1(), parameters.getG1Count(), parameters.getG2(),
parameters.getG2Count());
break;
case RESOURCE:
loadTrustedSetupFromResource();
break;
} }
} }
@ -223,6 +237,10 @@ public class CKZG4844JNITest {
CKZG4844JNI.loadTrustedSetup(TRUSTED_SETUP_FILE_BY_PRESET.get(PRESET)); CKZG4844JNI.loadTrustedSetup(TRUSTED_SETUP_FILE_BY_PRESET.get(PRESET));
} }
public static void loadTrustedSetupFromResource() {
CKZG4844JNI.loadTrustedSetupFromResource(TRUSTED_SETUP_RESOURCE_BY_PRESET.get(PRESET), CKZG4844JNITest.class);
}
private static Stream<VerifyKzgProofParameters> getVerifyKzgProofTestVectors() { private static Stream<VerifyKzgProofParameters> getVerifyKzgProofTestVectors() {
loadTrustedSetup(); loadTrustedSetup();
return TestUtils.getVerifyKzgProofTestVectors().stream().onClose(CKZG4844JNI::freeTrustedSetup); return TestUtils.getVerifyKzgProofTestVectors().stream().onClose(CKZG4844JNI::freeTrustedSetup);

4163
bindings/java/src/testFixtures/resources/test-vectors/trusted_setup.txt Normal file
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71
bindings/java/src/testFixtures/resources/test-vectors/trusted_setup_4.txt Normal file
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@ -0,0 +1,71 @@
4
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