Encrypt the plain text using RSA public key. - Java Security

Java examples for Security:RSA

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Description

Encrypt the plain text using RSA public key.

Demo Code

/**/*from  w w w . j ava2s.  c om*/
 * The contents of this file are subject to the terms
 * of the Common Development and Distribution License
 * (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.zhuangxulin.com/licenses/LICENSE-1.0
          
 * 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 com.java2s;

import java.security.PublicKey;
import javax.crypto.Cipher;

public class Main {
    /**
     * String to hold name of the encryption algorithm.
     */
    public static final String ALGORITHM = "RSA";

    /**
     * Encrypt the plain text using public key.
     * 
     * @param text
     *            : original plain text
     * @param key
     *            :The public key
     * @return Encrypted text
     * @throws java.lang.Exception
     */
    public static byte[] encrypt(String text, PublicKey key) {
        byte[] cipherText = null;
        try {
            // get an RSA cipher object and print the provider
            final Cipher cipher = Cipher.getInstance(ALGORITHM);
            // encrypt the plain text using the public key
            cipher.init(Cipher.ENCRYPT_MODE, key);
            cipherText = cipher.doFinal(text.getBytes());
        } catch (Exception e) {
            e.printStackTrace();
        }
        return cipherText;
    }
}

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