/*
 * Licensed to Crate under one or more contributor license agreements.
 * See the NOTICE file distributed with this work for additional
 * information regarding copyright ownership.  Crate 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.
 *
 * However, if you have executed another commercial license agreement
 * with Crate these terms will supersede the license and you may use the
 * software solely pursuant to the terms of the relevant commercial
 * agreement.
 */

package io.crate.license;

import org.elasticsearch.common.io.Streams;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;

final class EnterpriseLicense {

    private EnterpriseLicense() {
    }

    static byte[] decrypt(byte[] encryptedContent) {
        return CryptoUtils.decryptRSAUsingPublicKey(encryptedContent, publicKey());

    }

    private static byte[] publicKey() {
        try (InputStream is = LicenseService.class.getResourceAsStream("/public.key")) {
            ByteArrayOutputStream out = new ByteArrayOutputStream();
            Streams.copy(is, out);
            return out.toByteArray();
        } catch (IOException ex) {
            throw new IllegalStateException(ex);
        }
    }
}

/*
 * Licensed to Crate under one or more contributor license agreements.
 * See the NOTICE file distributed with this work for additional
 * information regarding copyright ownership.  Crate 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.
 *
 * However, if you have executed another commercial license agreement
 * with Crate these terms will supersede the license and you may use the
 * software solely pursuant to the terms of the relevant commercial
 * agreement.
 */

package io.crate.license;

import org.elasticsearch.common.io.Streams;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;

final class EnterpriseLicense {

    private EnterpriseLicense() {
    }

    static byte[] decrypt(byte[] encryptedContent) {
        return CryptoUtils.decryptRSAUsingPublicKey(encryptedContent, publicKey());

    }

    private static byte[] publicKey() {
        try (InputStream is = LicenseService.class.getResourceAsStream("/public.key")) {
            ByteArrayOutputStream out = new ByteArrayOutputStream();
            Streams.copy(is, out);
            return out.toByteArray();
        } catch (IOException ex) {
            throw new IllegalStateException(ex);
        } catch (NullPointerException e) {
            throw new IllegalStateException("The CrateDB distribution is missing its public key", e);
        }
    }
}

Throw a meaningful error if public key is missing from the distribution