library/src/main/java/org/apache/fineract/cn/anubis/provider/FinKeycloakRsaKeyProvider.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.apache.fineract.cn.anubis.provider;

import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Component;

import java.security.KeyFactory;
import java.security.NoSuchAlgorithmException;
import java.security.PublicKey;
import java.security.spec.InvalidKeySpecException;
import java.security.spec.X509EncodedKeySpec;
import java.util.Base64;

/**
 * @author manoj
 */
@Component
public class FinKeycloakRsaKeyProvider {
    @Value("${fin.keycloak.realm.publicKey}")
    private String rsaPublicKey;

    public PublicKey getPublicKey() throws InvalidKeySpecException, NoSuchAlgorithmException {

        X509EncodedKeySpec keySpec = new X509EncodedKeySpec(Base64.getDecoder().decode(rsaPublicKey));
        KeyFactory kf = KeyFactory.getInstance("RSA");
        return kf.generatePublic(keySpec);
    }
}