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package org.openslx.satellitedaemon.util;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.security.InvalidKeyException;
import java.security.Key;
import java.security.KeyPair;
import java.security.KeyStore;
import java.security.KeyStoreException;
import java.security.NoSuchAlgorithmException;
import java.security.PrivateKey;
import java.security.PublicKey;
import java.security.Signature;
import java.security.SignatureException;
import java.security.UnrecoverableKeyException;
import java.security.cert.Certificate;
import java.security.cert.CertificateException;
public class EncryptWithServerIdPublicKey {
KeyPair pair;
public EncryptWithServerIdPublicKey(String alias, String password, String file)
throws NoSuchAlgorithmException, CertificateException,
FileNotFoundException, IOException, KeyStoreException,
UnrecoverableKeyException {
KeyStore keystore = KeyStore.getInstance("JKS");
keystore.load(new FileInputStream(new File(file)),
password.toCharArray());
Certificate cert = null;
Key key = keystore.getKey(alias, password.toCharArray());
if (key instanceof PrivateKey) {
cert = keystore.getCertificate(alias);
PublicKey publicKey = cert.getPublicKey();
pair = new KeyPair(publicKey, (PrivateKey) key);
}
}
public byte[] encryptString(String message) throws NoSuchAlgorithmException,
InvalidKeyException, SignatureException {
Signature signature = Signature.getInstance("SHA256WITHRSA");
signature.initSign(pair.getPrivate());
signature.update(message.getBytes());
return signature.sign();
}
}
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