org.keycloak.crypto.AsymmetricSignatureSignerContext 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 java.security.PrivateKey;
import java.security.Signature;
public class AsymmetricSignatureSignerContext implements SignatureSignerContext {
private final KeyWrapper key;
public AsymmetricSignatureSignerContext(KeyWrapper key) throws SignatureException {
this.key = key;
}
@Override
public String getKid() {
return key.getKid();
}
@Override
public String getAlgorithm() {
return key.getAlgorithmOrDefault();
}
@Override
public String getHashAlgorithm() {
return JavaAlgorithm.getJavaAlgorithmForHash(key.getAlgorithmOrDefault(), key.getCurve());
}
@Override
public byte[] sign(byte[] data) throws SignatureException {
try {
Signature signature = Signature.getInstance(JavaAlgorithm.getJavaAlgorithm(key.getAlgorithmOrDefault(), key.getCurve()));
signature.initSign((PrivateKey) key.getPrivateKey());
signature.update(data);
return signature.sign();
} catch (Exception e) {
throw new SignatureException("Signing failed", e);
}
}
}