java util - MD5/AES/RSA快速调用工具
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测试代码
package cn.java.security; import java.security.Key; import java.util.Base64; import org.junit.Assert; import cn.java.codec.hex.HexUtil; import cn.java.security.SecurityUtil.RsaUtil.RsaKeyPair; public class Test { public static void main(String[] args) throws Exception{ System.out.println("-----------<<< testDigest >>>------------------"); testDigest(); System.out.println(); System.out.println("-----------<<< testAes >>>------------------"); testAes(); System.out.println(); System.out.println("-----------<<< testRsa >>>------------------"); testRsa(); System.out.println(); } /** * 对称加密算法 * @throws Exception */ public static void testAes() throws Exception { String content = "testAes"; String secretKeyStr = SecurityUtil.AesUtil.generaterKey(); System.out.println("-----------secretKeyStr------------------"); System.out.println(secretKeyStr); String encryptStr = SecurityUtil.AesUtil.encrypt(content, secretKeyStr); String decryptStr = SecurityUtil.AesUtil.decrypt(encryptStr, secretKeyStr); System.out.println("-----------encryptStr------------------"); System.out.println(encryptStr); System.out.println("-----------decryptStr------------------"); System.out.println(decryptStr); } /** * 非对称加密算法 * @throws Exception */ public static void testRsa() throws Exception { String content = "testRsa"; // 生成秘钥对 RsaKeyPair mRsaKeyPair = SecurityUtil.RsaUtil.generaterKeyPair(); String privateKeyStr = mRsaKeyPair.getPrivateKey(); String publicKeyStr = mRsaKeyPair.getPublicKey(); System.out.println("-----------privateKeyStr------------------"); System.out.println(privateKeyStr); System.out.println("-----------publicKeyStr------------------"); System.out.println(publicKeyStr); // test sign { String signStr = SecurityUtil.RsaUtil.sign(content, privateKeyStr,true); boolean isValid = SecurityUtil.RsaUtil.verify(content,signStr, publicKeyStr,true); System.out.println("-----------signStr------------------"); System.out.println(signStr); System.out.println("-----------isValid------------------"); System.out.println(isValid); } // test codec { Key privateKey = SecurityUtil.RsaUtil.getPrivateKey(privateKeyStr); Key publicKey = SecurityUtil.RsaUtil.getPublicKey(publicKeyStr); // 私钥加密、公钥解密 String encryptStr = SecurityUtil.RsaUtil.encrypt(content, privateKey); String decryptStr = SecurityUtil.RsaUtil.decrypt(encryptStr, publicKey); // Assert.assertEquals(content, decryptStr); System.out.println("-----------encryptStr------------------"); System.out.println(encryptStr); System.out.println("-----------decryptStr------------------"); System.out.println(decryptStr); // 公钥加密、私钥解密 encryptStr = SecurityUtil.RsaUtil.encrypt(content, privateKey); decryptStr = SecurityUtil.RsaUtil.decrypt(encryptStr, publicKey); Assert.assertEquals(content, decryptStr); } } /** * 签名 */ public static void testDigest() throws Exception { byte[] bytes = SecurityUtil.MessageDigestUtil.digest("test", true); String hexEncode = HexUtil.encode(bytes); System.out.println(hexEncode); byte[] hexDecode = HexUtil.decode(hexEncode); System.out.println(Base64.getEncoder().encodeToString(bytes)); System.out.println(Base64.getEncoder().encodeToString(hexDecode)); } }
数据内容
-----------<<< testDigest >>>------------------ 098f6bcd4621d373cade4e832627b4f6 CY9rzUYh03PK3k6DJie09g== CY9rzUYh03PK3k6DJie09g== -----------<<< testAes >>>------------------ -----------secretKeyStr------------------ BREMlyKxuMP2Qc7wIVa9Hg== 16 16 -----------encryptStr------------------ W+47ylkmqZ3G2Wq95esUEg== -----------decryptStr------------------ testAes -----------<<< testRsa >>>------------------ -----------privateKeyStr------------------ 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 -----------publicKeyStr------------------ MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAkLFh+X7DI9NyWtluacbws+SQazlBeN8mQnp1LgQfYDHCR/aMkjnkFVlogECfrFaiOEKjC62LGSbjZ7hxVq/riBcl1e3aEAxcrLz5mzHkNVD0fQb/utEAuO2EaVcwEd8dGxkWwd3AidlPreecQ1dArpY6ke1+Asn1Ug76mkVdPLkZ/m/7yLwtHutt1InXs9SMBm6G1mFwS+lkUtKKDpvAHEsvOPnPpmobjlEBYyWpNfHwcCWJz0x1kJ6cbZz2ENNvC2NOTY57seg2NrRKnmr7xbhkOI1xISxKk0C9HU9v2rjN/cBKy5IH8F+jjz4AjPwHFCmjP6Xc22RtSJ9rFYxVJQIDAQAB -----------signStr------------------ ZZuYMdl58w2TCBaUMfU0p+XUL6Irix9/nD0gPm83P/xqlY18GROztZmat5XLKA5Wu373/2l2WhIKdp7DYoQm0Cnmr/0PDGz9PHw2Hhd9I52OVkcDqSPqgmo0U9uE02Urlt3C2moVS08b3VhLHOOzSq8lcsicqis17p0KY33k2he2XMbHEJEbxRMkPCDubDWqwnS/fKiXbNn3u+jni7zdX/Phaq41V2lMMMjdIP8Pm7OxlxdNP3aoTAu6eHaCvakganQE2cz6Y1HwfgXgA8EzaTCcE+weGBbfy9umcMfK0/Pnsqp+jTiz3c8O0p0C8QwogGwIOLBzbeu4d9svC8JA9Q== -----------isValid------------------ true -----------encryptStr------------------ dJGhdeCaK/gw52NkD+z1BPoooKYgHqMWUn+tvyPndrq1f5oqaqc8mn/ZclWCLg/hN4PE9zi7gCD9xgp/KEPWOc6XNzOXA/92LVBERpGGtYLQmZnOS8ZrrD4xxxMmra5qD2j03T9Cu4xrICCVZ/Qcp7l05/tZt6tFXJqSDG5uSN9I/en+Mbza9aGwBiTWm6rpv+E5F3sMVk9XDMMgVTMVu6DeT4jZ7HjQ+GATlYFHReVFWmyTv8ijKdnhgMhVvOrGToRAu/ExbNuF99l6FB5I5ZQQMU0wyQDlpXm4GYoRIMmT5wweWJy2f0yO4BnkTje8oNMz7pXnuhNdEulZ5S86sA== -----------decryptStr------------------ testRsa
工具类
package cn.java.security; import java.security.Key; import java.security.KeyFactory; import java.security.KeyPair; import java.security.KeyPairGenerator; import java.security.MessageDigest; import java.security.NoSuchAlgorithmException; import java.security.PrivateKey; import java.security.PublicKey; import java.security.SecureRandom; import java.security.interfaces.RSAPrivateKey; import java.security.interfaces.RSAPublicKey; import java.security.spec.InvalidKeySpecException; import java.security.spec.PKCS8EncodedKeySpec; import java.security.spec.X509EncodedKeySpec; import java.util.Base64; import javax.crypto.Cipher; import javax.crypto.KeyGenerator; import javax.crypto.SecretKey; import javax.crypto.spec.SecretKeySpec; public class SecurityUtil { /** * 消息摘要 * @author zhouzhian * */ public static class MessageDigestUtil { public static byte[] digest(String content, boolean isMd5) throws Exception { MessageDigest messageDigest = null; String algorithm = isMd5 ? "MD5" : "SHA"; messageDigest = MessageDigest.getInstance(algorithm); return messageDigest.digest(content.getBytes()); } public static byte[] digest1(String content, boolean isMd5) throws Exception { MessageDigest messageDigest = null; String algorithm = isMd5 ? "MD5" : "SHA"; messageDigest = MessageDigest.getInstance(algorithm); messageDigest.update(content.getBytes()); return messageDigest.digest(); } } /** * 对称加密算法 * @author zhouzhian * */ public static class AesUtil { private static final String ALGORITHM = "AES"; private static final String DEFAULT_CHARSET = "UTF-8"; /** * 生成秘钥 * @return * @throws NoSuchAlgorithmException */ public static String generaterKey() throws NoSuchAlgorithmException { KeyGenerator keygen = KeyGenerator.getInstance(ALGORITHM); keygen.init(128, new SecureRandom()); // 16 字节 == 128 bit // keygen.init(128, new SecureRandom(seedStr.getBytes())); // 随机因子一样,生成出来的秘钥会一样 SecretKey secretKey = keygen.generateKey(); return Base64.getEncoder().encodeToString(secretKey.getEncoded()); } /** */ public static SecretKeySpec getSecretKeySpec(String secretKeyStr){ byte[] secretKey = Base64.getDecoder().decode(secretKeyStr); System.out.println(secretKey.length); return new SecretKeySpec(secretKey, ALGORITHM); } /** * 加密 */ public static String encrypt(String content,String secretKey) throws Exception{ Key key = getSecretKeySpec(secretKey); Cipher cipher = Cipher.getInstance(ALGORITHM);// 创建密码器 cipher.init(Cipher.ENCRYPT_MODE, key);// 初始化 byte[] result = cipher.doFinal(content.getBytes(DEFAULT_CHARSET)); return Base64.getEncoder().encodeToString(result); } /** * 解密 */ public static String decrypt(String content, String secretKey) throws Exception{ Key key = getSecretKeySpec(secretKey); Cipher cipher = Cipher.getInstance(ALGORITHM); cipher.init(Cipher.DECRYPT_MODE, key); byte[] result = cipher.doFinal(Base64.getDecoder().decode(content)); return new String(result); } } /** * 非对称加密算法 * @author zhouzhian * */ public static class RsaUtil { public static class RsaKeyPair { private String publicKey =""; private String privateKey =""; public RsaKeyPair(String publicKey, String privateKey) { super(); this.publicKey = publicKey; this.privateKey = privateKey; } public String getPublicKey() { return publicKey; } public String getPrivateKey() { return privateKey; } } private static final String ALGORITHM = "RSA"; private static final String ALGORITHMS_SHA1WithRSA = "SHA1WithRSA"; private static final String ALGORITHMS_SHA256WithRSA = "SHA256WithRSA"; private static final String DEFAULT_CHARSET = "UTF-8"; private static String getAlgorithms(boolean isRsa2) { return isRsa2 ? ALGORITHMS_SHA256WithRSA : ALGORITHMS_SHA1WithRSA; } /** * 生成秘钥对 * @return * @throws NoSuchAlgorithmException */ public static RsaKeyPair generaterKeyPair() throws NoSuchAlgorithmException{ KeyPairGenerator keygen = KeyPairGenerator.getInstance(ALGORITHM); SecureRandom random = new SecureRandom(); // SecureRandom random = new SecureRandom(seedStr.getBytes()); // 随机因子一样,生成出来的秘钥会一样 // 512位已被破解,用1024位,最好用2048位 keygen.initialize(2048, random); // 生成密钥对 KeyPair keyPair = keygen.generateKeyPair(); RSAPrivateKey privateKey = (RSAPrivateKey)keyPair.getPrivate(); RSAPublicKey publicKey = (RSAPublicKey)keyPair.getPublic(); String privateKeyStr = Base64.getEncoder().encodeToString(privateKey.getEncoded()); String publicKeyStr = Base64.getEncoder().encodeToString(publicKey.getEncoded()); return new RsaKeyPair(publicKeyStr,privateKeyStr); } /** * 获取公钥 * @param publicKey * @return * @throws Exception */ public static RSAPublicKey getPublicKey(String publicKey) throws Exception{ byte[] keyBytes = Base64.getDecoder().decode(publicKey); X509EncodedKeySpec spec = new X509EncodedKeySpec(keyBytes); KeyFactory keyFactory = KeyFactory.getInstance(ALGORITHM); return (RSAPublicKey) keyFactory.generatePublic(spec); } /** * 获取私钥 * @param privateKey * @return * @throws NoSuchAlgorithmException * @throws InvalidKeySpecException * @throws Exception */ public static RSAPrivateKey getPrivateKey(String privateKey) throws Exception{ byte[] keyBytes = Base64.getDecoder().decode(privateKey); PKCS8EncodedKeySpec spec = new PKCS8EncodedKeySpec(keyBytes); KeyFactory keyFactory = KeyFactory.getInstance(ALGORITHM); return (RSAPrivateKey) keyFactory.generatePrivate(spec); } /** * 要私钥签名 * @throws InvalidKeySpecException * @throws Exception */ public static String sign(String content, String privateKey, boolean isRsa2) throws Exception { PrivateKey priKey = getPrivateKey(privateKey); java.security.Signature signature = java.security.Signature.getInstance(getAlgorithms(isRsa2)); signature.initSign(priKey); signature.update(content.getBytes(DEFAULT_CHARSET)); byte[] signed = signature.sign(); return Base64.getEncoder().encodeToString(signed); } /** * 要公钥签名 */ public static boolean verify(String content,String sign,String publicKey,boolean isRsa2) throws Exception { PublicKey pubKey = getPublicKey(publicKey); java.security.Signature signature = java.security.Signature.getInstance(getAlgorithms(isRsa2)); signature.initVerify(pubKey); signature.update(content.getBytes(DEFAULT_CHARSET)); return signature.verify(Base64.getDecoder().decode(sign)); } /** * 加密 * @param input * @param pubOrPrikey * @return */ public static String encrypt(String content, Key pubOrPrikey) throws Exception{ Cipher cipher = null; cipher = Cipher.getInstance(ALGORITHM); cipher.init(Cipher.ENCRYPT_MODE, pubOrPrikey); byte[] result = cipher.doFinal(content.getBytes(DEFAULT_CHARSET)); return Base64.getEncoder().encodeToString(result); } /** * 解密 * @param input * @param pubOrPrikey * @return */ public static String decrypt(String content, Key pubOrPrikey) throws Exception { Cipher cipher = null; cipher = Cipher.getInstance(ALGORITHM); cipher.init(Cipher.DECRYPT_MODE, pubOrPrikey); byte[] result = cipher.doFinal(Base64.getDecoder().decode(content)); return new String(result); } } }
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