org.keycloak.crypto.AsymmetricSignatureVerifierContext Maven / Gradle / Ivy
/*
* Copyright 2016 Red Hat, Inc. and/or its affiliates
* and other contributors as indicated by the @author tags.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.keycloak.crypto;
import org.keycloak.common.VerificationException;
import org.keycloak.common.crypto.CryptoIntegration;
import java.security.NoSuchAlgorithmException;
import java.security.NoSuchProviderException;
import java.security.PublicKey;
import java.security.Signature;
public class AsymmetricSignatureVerifierContext implements SignatureVerifierContext {
private final KeyWrapper key;
public AsymmetricSignatureVerifierContext(KeyWrapper key) {
this.key = key;
}
@Override
public String getKid() {
return key.getKid();
}
@Override
public String getAlgorithm() {
return key.getAlgorithmOrDefault();
}
@Override
public boolean verify(byte[] data, byte[] signature) throws VerificationException {
try {
Signature verifier = getSignature();
verifier.initVerify((PublicKey) key.getPublicKey());
verifier.update(data);
return verifier.verify(signature);
} catch (Exception e) {
throw new VerificationException("Signing failed", e);
}
}
private Signature getSignature()
throws NoSuchAlgorithmException, NoSuchProviderException {
try {
return Signature.getInstance(JavaAlgorithm.getJavaAlgorithm(key.getAlgorithmOrDefault(), key.getCurve()));
} catch (NoSuchAlgorithmException e) {
// Retry using the current crypto provider's override implementation
return CryptoIntegration.getProvider().getSignature(key.getAlgorithmOrDefault());
}
}
}