com.virgilsecurity.sdk.pfs.EphemeralCardValidator Maven / Gradle / Ivy
/*
* Copyright (c) 2017, Virgil Security, Inc.
*
* All rights reserved.
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* * Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* * Neither the name of virgil nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package com.virgilsecurity.sdk.pfs;
import java.util.HashMap;
import java.util.Map;
import java.util.Map.Entry;
import com.virgilsecurity.sdk.client.model.CardModel;
import com.virgilsecurity.sdk.crypto.Crypto;
import com.virgilsecurity.sdk.crypto.Fingerprint;
import com.virgilsecurity.sdk.crypto.PublicKey;
/**
* @author Andrii Iakovenko
*
*/
public class EphemeralCardValidator {
private Crypto crypto;
private Map verifiers;
/**
* Create new instance of {@link EphemeralCardValidator}.
*
* @param crypto
*/
public EphemeralCardValidator(Crypto crypto) {
this.crypto = crypto;
this.verifiers = new HashMap<>();
}
public void addVerifier(String verifierId, byte[] publicKeyData) {
PublicKey publicKey = this.crypto.importPublicKey(publicKeyData);
this.verifiers.put(verifierId, publicKey);
}
public boolean validate(CardModel card) {
Fingerprint fingerprint = this.crypto.calculateFingerprint(card.getSnapshot());
String cardId = fingerprint.toHex();
if (!cardId.equals(card.getId())) {
return false;
}
for (Entry verifier : this.verifiers.entrySet()) {
if (!card.getMeta().getSignatures().containsKey(verifier.getKey())) {
return false;
}
byte[] signature = card.getMeta().getSignatures().get(verifier.getKey());
try {
this.crypto.verify(fingerprint.getValue(), signature, verifier.getValue());
} catch (Exception e) {
return false;
}
}
return true;
}
}