java实现AES RSA"/>
java实现AES RSA
public class RsaTest {public static void main(String[] args) throws NoSuchAlgorithmException, InvalidKeySpecException {// key必须是16位，如果加密key不变，则加密后的结果不变String keyStr = "1234567890123456";byte[] key = keyStr.getBytes(StandardCharsets.UTF_8);AES aes = SecureUtil.aes(key);// 身份证String cardNo = "123456789012345678";//给身份证加密String aCiphertext = aes.encryptBase64(cardNo);System.out.println("身份证加密后，aKey：" + aCiphertext);//dXzNDNxckOrb7uz2ON0AALdB3876BYz3rv3cUutdHRc=//身份证解密String aDecrypt = aes.decryptStr(aCiphertext);System.out.println("身份证解密后得到：" + aDecrypt);// RSA 加密String content = "需要加密的内容";// 为RSA算法创建一个KeyPairGenerator对象KeyPairGenerator kpg;try {kpg = KeyPairGenerator.getInstance("RSA");} catch (NoSuchAlgorithmException e) {throw new IllegalArgumentException("No such algorithm-->[" + "RSA" + "]");}// 初始化KeyPairGenerator对象,密钥长度kpg.initialize(1024);// 生成密匙对KeyPair keyPair = kpg.generateKeyPair();// 得到公钥Key publicKey = keyPair.getPublic();String publicKeyStr = org.apachemons.codec.binary.Base64.encodeBase64URLSafeString(publicKey.getEncoded());// 得到私钥Key privateKey = keyPair.getPrivate();String privateKeyStr = Base64.encodeBase64URLSafeString(privateKey.getEncoded());// map装载公钥和私钥 ， 如果公钥、私钥不变，则加密结果相同Map<String, String> keys = new HashMap();keys.put("publicKey", publicKeyStr);//keys.put("publicKey", "MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCkNvwilBg9hS0jN2TL6koM9inu7H6vdBZ_c9G1P6UU1RaEWuaKqjvK0Hw5obT_0dTic2qlWyAk3LtuSae9R8c0yVylkUsKgvMKi29Pm13jnOl3kdt-z0YHemWtX9mozrL4xNEj-fB_c3fOxnbAQVc-tCXdDlMYPoJWYn7-EvRWdQIDAQAB");keys.put("privateKey", privateKeyStr);//keys.put("privateKey", "MIICdwIBADANBgkqhkiG9w0BAQEFAASCAmEwggJdAgEAAoGBAKQ2_CKUGD2FLSM3ZMvqSgz2Ke7sfq90Fn9z0bU_pRTVFoRa5oqqO8rQfDmhtP_R1OJzaqVbICTcu25Jp71HxzTJXKWRSwqC8wqLb0-bXeOc6XeR237PRgd6Za1f2ajOsvjE0SP58H9zd87GdsBBVz60Jd0OUxg-glZifv4S9FZ1AgMBAAECgYBuhouhgmfmUFKXF1uCXAjHPI_wvcBuuwXBduS4x0OHB_0FzGDLB9UCptxVtd8rJ8HPQLuQ3AqAhQiqLGz32u3aJtKywUpWJHgOFGxNrh4EZdVdyXw8iu1HMg8L-THLpYtYtdB0CakcNZqdv_eNuC1Y1-6ZwsAVbplWKkBwG4oBKQJBANwd5dO2v7nJgy55Zc-5BHI6-Ru9fAE6-0Y80UjxyuZW1Syc1AVM9V4Rnbvv8sjTY4NtEaE4IOWNdLEr5r_1Y-cCQQC-_CMKnGLAEpD1qiPRcw_HdqFKQ7kaYr2OZMnLfoCHx_JThFWPsdcj_xZXQVKnrl405GHKoGovxO1fPtuABSdDAkEAporwg3l4Iuf3G0i64aoJVSyNopGBq6SmzgPiDaD0dccpT7HxMXmDBQOrJrFsLsrSNnRlrGe9bDHVIuAmnQLb7QJAbXefrilNAMKji-vlc9v7o1x_vk1q_5CxDbj_YUA0857LastjL2XD5sIDUCgE9E-hd7efxcCEnLTHSdyBe7N4eQJBANYMrPPBPr-2do4ngEDrvxwqbL6E4IL7npoTosySjHqURltj3p22qGQ4B1znA_8R3rCRfkDqgvFih02gT5GxvoE");System.out.println("生成的公钥：" + keys.get("publicKey"));//MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCkNvwilBg9hS0jN2TL6koM9inu7H6vdBZ_c9G1P6UU1RaEWuaKqjvK0Hw5obT_0dTic2qlWyAk3LtuSae9R8c0yVylkUsKgvMKi29Pm13jnOl3kdt-z0YHemWtX9mozrL4xNEj-fB_c3fOxnbAQVc-tCXdDlMYPoJWYn7-EvRWdQIDAQABSystem.out.println("生成的私钥：" + keys.get("privateKey"));//MIICdwIBADANBgkqhkiG9w0BAQEFAASCAmEwggJdAgEAAoGBAKQ2_CKUGD2FLSM3ZMvqSgz2Ke7sfq90Fn9z0bU_pRTVFoRa5oqqO8rQfDmhtP_R1OJzaqVbICTcu25Jp71HxzTJXKWRSwqC8wqLb0-bXeOc6XeR237PRgd6Za1f2ajOsvjE0SP58H9zd87GdsBBVz60Jd0OUxg-glZifv4S9FZ1AgMBAAECgYBuhouhgmfmUFKXF1uCXAjHPI_wvcBuuwXBduS4x0OHB_0FzGDLB9UCptxVtd8rJ8HPQLuQ3AqAhQiqLGz32u3aJtKywUpWJHgOFGxNrh4EZdVdyXw8iu1HMg8L-THLpYtYtdB0CakcNZqdv_eNuC1Y1-6ZwsAVbplWKkBwG4oBKQJBANwd5dO2v7nJgy55Zc-5BHI6-Ru9fAE6-0Y80UjxyuZW1Syc1AVM9V4Rnbvv8sjTY4NtEaE4IOWNdLEr5r_1Y-cCQQC-_CMKnGLAEpD1qiPRcw_HdqFKQ7kaYr2OZMnLfoCHx_JThFWPsdcj_xZXQVKnrl405GHKoGovxO1fPtuABSdDAkEAporwg3l4Iuf3G0i64aoJVSyNopGBq6SmzgPiDaD0dccpT7HxMXmDBQOrJrFsLsrSNnRlrGe9bDHVIuAmnQLb7QJAbXefrilNAMKji-vlc9v7o1x_vk1q_5CxDbj_YUA0857LastjL2XD5sIDUCgE9E-hd7efxcCEnLTHSdyBe7N4eQJBANYMrPPBPr-2do4ngEDrvxwqbL6E4IL7npoTosySjHqURltj3p22qGQ4B1znA_8R3rCRfkDqgvFih02gT5GxvoEString sCiphertext = null;try {RSAPrivateKey rSAPrivateKey = RSAUtils.getPrivateKey(keys.get("privateKey"));sCiphertext = RSAUtils.privateEncrypt(content, rSAPrivateKey);} catch (Exception e) {System.out.println("发生异常" + e.getMessage());}System.out.println("加密后得到密文：" + sCiphertext);//mr5fkld7DT02IvX93JvT97lTFyn1NK6GtaOc26ODIBp6IYfZyO0t6bXCE0U5rqgu-vA_XOIt04YYTen6S_3zyzABd5cjgxphbclaeXUVxdn1hB3MZuyYblhnTOGKwv7fcRI9SjQey_GtuTLxMCfdCLWabC3c97D35VRc3PuUbnYSystem.out.println("密文长度：" + sCiphertext.length());//171//RSA解密RSAPublicKey rSAPublicKey = RSAUtils.getPublicKey(keys.get("publicKey"));String sDecrypt = RSAUtils.publicDecrypt(sCiphertext, rSAPublicKey);System.out.println("解密后得到原文：" + sDecrypt);}
}
public class RSAUtils {public static final String RSA_ALGORITHM = "RSA";public static final String CHARSET = "UTF-8";/*** 创建公私钥* @param keySize 密钥长度，单位为 bit 。* 密钥长度的选择是安全性和程序性能平衡的结果，密钥长度越长，安全性越好，加密解密所需时间越长。* 密钥长度增长一倍，公钥操作所需时间增加约 4 倍，私钥操作所需时间增加约 8 倍，公私钥生成时间约增长 16 倍* @return*/public static Map<String, String> createKeys(int keySize) {// 为RSA算法创建一个KeyPairGenerator对象KeyPairGenerator kpg;try {kpg = KeyPairGenerator.getInstance(RSA_ALGORITHM);} catch (NoSuchAlgorithmException e) {throw new IllegalArgumentException("No such algorithm-->[" + RSA_ALGORITHM + "]");}// 初始化KeyPairGenerator对象,密钥长度kpg.initialize(keySize);// 生成密匙对KeyPair keyPair = kpg.generateKeyPair();// 得到公钥Key publicKey = keyPair.getPublic();String publicKeyStr = Base64.encodeBase64URLSafeString(publicKey.getEncoded());// 得到私钥Key privateKey = keyPair.getPrivate();String privateKeyStr = Base64.encodeBase64URLSafeString(privateKey.getEncoded());// map装载公钥和私钥Map<String, String> keyPairMap = new HashMap<String, String>();keyPairMap.put("publicKey", publicKeyStr);keyPairMap.put("privateKey", privateKeyStr);// 返回mapreturn keyPairMap;}/*** 得到公钥* @param publicKey 密钥字符串（经过base64编码）* @throws Exception*/public static RSAPublicKey getPublicKey(String publicKey) throws NoSuchAlgorithmException, InvalidKeySpecException {// 通过X509编码的Key指令获得公钥对象KeyFactory keyFactory = KeyFactory.getInstance(RSA_ALGORITHM);X509EncodedKeySpec x509KeySpec = new X509EncodedKeySpec(Base64.decodeBase64(publicKey));RSAPublicKey key = (RSAPublicKey) keyFactory.generatePublic(x509KeySpec);return key;}/*** 得到私钥* @param privateKey 密钥字符串（经过base64编码）* @throws Exception*/public static RSAPrivateKey getPrivateKey(String privateKey) throws NoSuchAlgorithmException, InvalidKeySpecException {// 通过PKCS#8编码的Key指令获得私钥对象KeyFactory keyFactory = KeyFactory.getInstance(RSA_ALGORITHM);PKCS8EncodedKeySpec pkcs8KeySpec = new PKCS8EncodedKeySpec(Base64.decodeBase64(privateKey));RSAPrivateKey key = (RSAPrivateKey) keyFactory.generatePrivate(pkcs8KeySpec);return key;}/*** 公钥加密* @param data* @param publicKey* @return*/public static String publicEncrypt(String data, RSAPublicKey publicKey) {try {Cipher cipher = Cipher.getInstance(RSA_ALGORITHM);cipher.init(Cipher.ENCRYPT_MODE, publicKey);return Base64.encodeBase64URLSafeString(rsaSplitCodec(cipher, Cipher.ENCRYPT_MODE, data.getBytes(CHARSET), publicKey.getModulus().bitLength()));} catch (Exception e) {throw new RuntimeException("加密字符串[" + data + "]时遇到异常", e);}}/*** 私钥解密* @param data* @param privateKey* @return*/public static String privateDecrypt(String data, RSAPrivateKey privateKey) {try {Cipher cipher = Cipher.getInstance(RSA_ALGORITHM);cipher.init(Cipher.DECRYPT_MODE, privateKey);return new String(rsaSplitCodec(cipher, Cipher.DECRYPT_MODE, Base64.decodeBase64(data), privateKey.getModulus().bitLength()), CHARSET);} catch (Exception e) {throw new RuntimeException("解密字符串[" + data + "]时遇到异常", e);}}/*** 私钥加密* @param data* @param privateKey* @return*/public static String privateEncrypt(String data, RSAPrivateKey privateKey) {try {Cipher cipher = Cipher.getInstance(RSA_ALGORITHM);//每个Cipher初始化方法使用一个模式参数opmod，并用此模式初始化Cipher对象。此外还有其他参数，包括密钥key、包含密钥的证书certificate、算法参数params和随机源random。cipher.init(Cipher.ENCRYPT_MODE, privateKey);return Base64.encodeBase64URLSafeString(rsaSplitCodec(cipher, Cipher.ENCRYPT_MODE, data.getBytes(CHARSET), privateKey.getModulus().bitLength()));} catch (Exception e) {throw new RuntimeException("加密字符串[" + data + "]时遇到异常", e);}}/*** 公钥解密* @param data* @param publicKey* @return*/public static String publicDecrypt(String data, RSAPublicKey publicKey) {try {Cipher cipher = Cipher.getInstance(RSA_ALGORITHM);cipher.init(Cipher.DECRYPT_MODE, publicKey);return new String(rsaSplitCodec(cipher, Cipher.DECRYPT_MODE, Base64.decodeBase64(data), publicKey.getModulus().bitLength()), CHARSET);} catch (Exception e) {throw new RuntimeException("解密字符串[" + data + "]时遇到异常", e);}}//rsa切割解码 , ENCRYPT_MODE,加密数据 ,DECRYPT_MODE,解密数据private static byte[] rsaSplitCodec(Cipher cipher, int opmode, byte[] datas, int keySize) {int maxBlock = 0; //最大块if (opmode == Cipher.DECRYPT_MODE) {maxBlock = keySize / 8;} else {maxBlock = keySize / 8 - 11;}ByteArrayOutputStream out = new ByteArrayOutputStream();int offSet = 0;byte[] buff;int i = 0;try {while (datas.length > offSet) {if (datas.length - offSet > maxBlock) {//可以调用以下的doFinal（）方法完成加密或解密数据：buff = cipher.doFinal(datas, offSet, maxBlock);} else {buff = cipher.doFinal(datas, offSet, datas.length - offSet);}out.write(buff, 0, buff.length);i++;offSet = i * maxBlock;}} catch (Exception e) {throw new RuntimeException("加解密阀值为[" + maxBlock + "]的数据时发生异常", e);}byte[] resultDatas = out.toByteArray();IOUtils.closeQuietly(out);return resultDatas;}}
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java实现AES RSA
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