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- package com.simple.utils;
-
-
- import org.apache.commons.codec.binary.Base64;
-
- import javax.crypto.Cipher;
- import java.io.ByteArrayOutputStream;
- import java.security.Key;
- import java.security.KeyFactory;
- import java.security.spec.X509EncodedKeySpec;
-
- public class RsaUtil {
- public static final String KEY_ALGORITHM = "RSA";
-
- public static final String PUBLIC_KEY = //"-----BEGIN PUBLIC KEY-----" +
- "MIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEAvh8j/zagfxQdnSh5OIic" +
- "MzN+MuRuWQJPjgu4Gza4+gX3j5Ln2xNDBOTjpwyuLBjh/JcBd1cGO3lAaKCwcaix" +
- "smhTq56wVXXUMgDiAChu4ud8FSvRc8G8tdZAirKVAIi3NW+/pYgpWBs/0wnF8hz4" +
- "8no4pyJHl9Jc1LH3VNIMz8vqzKUPc4ack4pFUXlcNj6C+sBlaurmI4/vwLqNxBGs" +
- "7/zyM7dv6oy3DSU/Y1qBArM1YPjfL2dNun8rmtPgJvlPwXqA7uoHPwQ2Ym3aUn59" +
- "pkS7QI6IE8uuqNkfSte8BXLd2nIqPLFxLYLDmdll7eoyRblHcHqAYSj8stK6StC7" +
- "DNryNKEjTEwbgf9trUI0uvF1pfgTy2gpclnY69FtD/m0+FvLyorMq+nmBqYMjka5" +
- "K0txDQJPOa7gsi//uXd/cJW2SAXY9MSO1AfMi8Xq/YKRQzN9FW5iapskXFHca7uX" +
- "g5NhH7flr6DW+QInFlpoN6WIEAuDF1aj4O49Ikm3WxwhTqnvEkdSCfivpYQkp9Sh" +
- "4kQ/SQdxuT7VX+Nz6k+uMx2z4cySk33bHi0KoHbA9QFGg/54Qd0+eU4qZnd4mrgh" +
- "hH7/QQhL7Z9eF1U5UPrsHq2Vq3rEnN+tYQ26AuKeU8vzTxBrC/SxC6C/SMFt3f/Y" +
- "nuFh1UnNJZleZwyQt+ZdGO0CAwEAAQ==";
- //"-----END PUBLIC KEY-----";
-
-
- private static final int MAX_ENCRYPT_BLOCK = 117;
-
- public static String RSAEncode(byte[] data, String publickey)
- throws Exception {
- byte[] keyBytes = Base64.decodeBase64(publickey);
- X509EncodedKeySpec x509KeySpec = new X509EncodedKeySpec(keyBytes);
- KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM);
- Key publicK = keyFactory.generatePublic(x509KeySpec);
- // 对数据加密
- Cipher cipher = Cipher.getInstance(keyFactory.getAlgorithm());
- cipher.init(Cipher.ENCRYPT_MODE, publicK);
- int inputLen = data.length;
- ByteArrayOutputStream out = new ByteArrayOutputStream();
- int offSet = 0;
- byte[] cache;
- int i = 0;
- // 对数据分段加密
- while (inputLen - offSet > 0) {
- if (inputLen - offSet > MAX_ENCRYPT_BLOCK) {
- cache = cipher.doFinal(data, offSet, MAX_ENCRYPT_BLOCK);
- } else {
- cache = cipher.doFinal(data, offSet, inputLen - offSet);
- }
- out.write(cache, 0, cache.length);
- i++;
- offSet = i * MAX_ENCRYPT_BLOCK;
- }
- byte[] encryptedData = out.toByteArray();
- out.close();
- return Base64.encodeBase64String(encryptedData);
- }
-
- }
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