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Signal Protocol cryptography library for Java
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//
// Copyright 2020-2021 Signal Messenger, LLC.
// SPDX-License-Identifier: AGPL-3.0-only
//
package org.signal.zkgroup.receipts;
import java.security.SecureRandom;
import org.signal.zkgroup.InvalidInputException;
import org.signal.zkgroup.ServerSecretParams;
import org.signal.zkgroup.VerificationFailedException;
import org.signal.client.internal.Native;
import static org.signal.zkgroup.internal.Constants.RANDOM_LENGTH;
public class ServerZkReceiptOperations {
private final ServerSecretParams serverSecretParams;
public ServerZkReceiptOperations(ServerSecretParams serverSecretParams) {
this.serverSecretParams = serverSecretParams;
}
public ReceiptCredentialResponse issueReceiptCredential(ReceiptCredentialRequest receiptCredentialRequest, long receiptExpirationTime, long receiptLevel) throws VerificationFailedException {
return issueReceiptCredential(new SecureRandom(), receiptCredentialRequest, receiptExpirationTime, receiptLevel);
}
public ReceiptCredentialResponse issueReceiptCredential(SecureRandom secureRandom, ReceiptCredentialRequest receiptCredentialRequest, long receiptExpirationTime, long receiptLevel) throws VerificationFailedException {
byte[] random = new byte[RANDOM_LENGTH];
secureRandom.nextBytes(random);
byte[] newContents = Native.ServerSecretParams_IssueReceiptCredentialDeterministic(serverSecretParams.getInternalContentsForJNI(), random, receiptCredentialRequest.getInternalContentsForJNI(), receiptExpirationTime, receiptLevel);
try {
return new ReceiptCredentialResponse(newContents);
} catch (InvalidInputException e) {
throw new AssertionError(e);
}
}
public void verifyReceiptCredentialPresentation(ReceiptCredentialPresentation receiptCredentialPresentation) throws VerificationFailedException {
Native.ServerSecretParams_VerifyReceiptCredentialPresentation(serverSecretParams.getInternalContentsForJNI(), receiptCredentialPresentation.getInternalContentsForJNI());
}
}
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