Java中有哪些加密與解密的方法?相信很多沒有經(jīng)驗的人對此束手無策,為此本文總結(jié)了問題出現(xiàn)的原因和解決方法,通過這篇文章希望你能解決這個問題。
創(chuàng)新互聯(lián)公司專注為客戶提供全方位的互聯(lián)網(wǎng)綜合服務(wù),包含不限于成都網(wǎng)站建設(shè)、成都做網(wǎng)站、鳳岡網(wǎng)絡(luò)推廣、微信小程序開發(fā)、鳳岡網(wǎng)絡(luò)營銷、鳳岡企業(yè)策劃、鳳岡品牌公關(guān)、搜索引擎seo、人物專訪、企業(yè)宣傳片、企業(yè)代運營等,從售前售中售后,我們都將竭誠為您服務(wù),您的肯定,是我們最大的嘉獎;創(chuàng)新互聯(lián)公司為所有大學(xué)生創(chuàng)業(yè)者提供鳳岡建站搭建服務(wù),24小時服務(wù)熱線:13518219792,官方網(wǎng)址:www.cdcxhl.com
一、常用的加密/解密算法
1.Base64
嚴(yán)格來說Base64并不是一種加密/解密算法,而是一種編碼方式。Base64不生成密鑰,通過Base64編碼后的密文就可以直接“翻譯”為明文,但是可以通過向明文中添加混淆字符來達(dá)到加密的效果。
2.DES
DES是一種基于56位密鑰的對稱算法,1976年被美國聯(lián)邦政府的國家標(biāo)準(zhǔn)局確定為聯(lián)邦資料處理標(biāo)準(zhǔn)(FIPS),隨后在國際上廣泛流傳開來?,F(xiàn)在DES已經(jīng)不是一種安全的加密算法,已被公開破解,現(xiàn)在DES已經(jīng)被高級加密標(biāo)準(zhǔn)(AES)所代替。
3.3DES
3DES是DES的一種派生算法,主要提升了DES的一些實用所需的安全性。
4.AES
AES是現(xiàn)在對稱加密算法中最流行的算法之一。
二、實現(xiàn)所需的一些庫
為了實現(xiàn)上述的算法,我們可以實用JDK自帶的實現(xiàn),也可以使用一些開源的第三方庫,例如Bouncy Castle(https://www.bouncycastle.org/)和comnons codec(https://commons.apache.org/proper/commons-codec/)。
三、具體實現(xiàn)
1.Base64
package com.tancky.security; import java.io.IOException; import sun.misc.BASE64Decoder; import sun.misc.BASE64Encoder; public class Base64Demo { private static String src = "TestBase64"; public static void main(String[] args) { Base64Demo.jdkBase64(); Base64Demo.commonsCodecBase64 (); Base64Demo.bouncyCastleBase64 (); } //使用JDK的base64實現(xiàn), public static void jdkBase64 (){ BASE64Encoder encoder = new BASE64Encoder(); String encode = encoder.encode(Base64Demo.src.getBytes()); System.out.println("encode: " + encode); BASE64Decoder decoder = new BASE64Decoder(); try { String decode = new String ( decoder.decodeBuffer(encode)); System.out.println("decode: " + decode); } catch (IOException e) { e.printStackTrace(); } } //使用apache的commonsCodec實現(xiàn) public static void commonsCodecBase64 (){ byte[] encodeBytes = org.apache.commons.codec.binary.Base64.encodeBase64(Base64Demo.src.getBytes()); String encode = new String (encodeBytes); System.out.println("encode: " + encode); byte[] decodeBytes = org.apache.commons.codec.binary.Base64.decodeBase64(encode); String decode = new String(decodeBytes); System.out.println("decode: " + decode); } //使用bouncyCastlede實現(xiàn) public static void bouncyCastleBase64 () { byte[] encodeBytes = org.bouncycastle.util.encoders.Base64.encode(Base64Demo.src.getBytes()) ; String encode = new String (encodeBytes); System.out.println("encode: " + encode); byte[] decodeBytes = org.bouncycastle.util.encoders.Base64.decode(encode); String decode = new String(decodeBytes); System.out.println("decode: " + decode); } }
2.DES
package com.tancky.security; import java.security.InvalidKeyException; import java.security.Key; import java.security.NoSuchAlgorithmException; import java.security.NoSuchProviderException; import java.security.Security; import java.security.spec.InvalidKeySpecException; import javax.crypto.BadPaddingException; import javax.crypto.Cipher; import javax.crypto.IllegalBlockSizeException; import javax.crypto.KeyGenerator; import javax.crypto.NoSuchPaddingException; import javax.crypto.SecretKey; import javax.crypto.SecretKeyFactory; import javax.crypto.spec.DESKeySpec; import org.bouncycastle.jce.provider.BouncyCastleProvider; import org.bouncycastle.util.encoders.Hex; public class DESDemo { private static String src = "TestDES"; public static void jdkDES () { try { //生成密鑰Key KeyGenerator keyGenerator = KeyGenerator.getInstance("DES"); keyGenerator.init(56); SecretKey secretKey = keyGenerator.generateKey(); byte[] bytesKey = secretKey.getEncoded(); //KEY轉(zhuǎn)換 DESKeySpec deSedeKeySpec = new DESKeySpec(bytesKey); SecretKeyFactory factory = SecretKeyFactory.getInstance("DES"); Key convertSecretKey = factory.generateSecret(deSedeKeySpec); //加密 Cipher cipher = Cipher.getInstance("DES/ECB/PKCS5Padding"); cipher.init(Cipher.ENCRYPT_MODE, convertSecretKey); byte[] encodeResult = cipher.doFinal(DESDemo.src.getBytes()); System.out.println("DESEncode :" + Hex.toHexString(encodeResult)); //解密 cipher.init(Cipher.DECRYPT_MODE,convertSecretKey); byte[] DecodeResult = cipher.doFinal(encodeResult); System.out.println("DESDncode :" + new String (DecodeResult)); } catch (NoSuchAlgorithmException e) { e.printStackTrace(); } catch (InvalidKeyException e) { // TODO 自動生成的 catch 塊 e.printStackTrace(); } catch (InvalidKeySpecException e) { // TODO 自動生成的 catch 塊 e.printStackTrace(); } catch (NoSuchPaddingException e) { // TODO 自動生成的 catch 塊 e.printStackTrace(); } catch (IllegalBlockSizeException e) { // TODO 自動生成的 catch 塊 e.printStackTrace(); } catch (BadPaddingException e) { // TODO 自動生成的 catch 塊 e.printStackTrace(); } } public static void bcDES (){ try { //使用BouncyCastle 的DES加密 Security.addProvider(new BouncyCastleProvider()); //生成密鑰Key KeyGenerator keyGenerator = KeyGenerator.getInstance("DES","BC"); keyGenerator.init(56); SecretKey secretKey = keyGenerator.generateKey(); byte[] bytesKey = secretKey.getEncoded(); //KEY轉(zhuǎn)換 DESKeySpec deSedeKeySpec = new DESKeySpec(bytesKey); SecretKeyFactory factory = SecretKeyFactory.getInstance("DES"); Key convertSecretKey = factory.generateSecret(deSedeKeySpec); //加密 Cipher cipher = Cipher.getInstance("DES/ECB/PKCS5Padding"); cipher.init(Cipher.ENCRYPT_MODE, convertSecretKey); byte[] encodeResult = cipher.doFinal(DESDemo.src.getBytes()); System.out.println("DESEncode :" + Hex.toHexString(encodeResult)); //解密 cipher.init(Cipher.DECRYPT_MODE,convertSecretKey); byte[] DecodeResult = cipher.doFinal(encodeResult); System.out.println("DESDncode :" + new String (DecodeResult)); } catch (NoSuchAlgorithmException e) { e.printStackTrace(); } catch (InvalidKeyException e) { // TODO 自動生成的 catch 塊 e.printStackTrace(); } catch (InvalidKeySpecException e) { // TODO 自動生成的 catch 塊 e.printStackTrace(); } catch (NoSuchPaddingException e) { // TODO 自動生成的 catch 塊 e.printStackTrace(); } catch (IllegalBlockSizeException e) { // TODO 自動生成的 catch 塊 e.printStackTrace(); } catch (BadPaddingException e) { // TODO 自動生成的 catch 塊 e.printStackTrace(); } catch (NoSuchProviderException e) { // TODO 自動生成的 catch 塊 e.printStackTrace(); } } public static void main(String[] args) { DESDemo.jdkDES (); DESDemo.bcDES(); } }
3.3DES
package com.tancky.security; import java.security.InvalidKeyException; import java.security.Key; import java.security.NoSuchAlgorithmException; import java.security.NoSuchProviderException; import java.security.Security; import java.security.spec.InvalidKeySpecException; import javax.crypto.BadPaddingException; import javax.crypto.Cipher; import javax.crypto.IllegalBlockSizeException; import javax.crypto.KeyGenerator; import javax.crypto.NoSuchPaddingException; import javax.crypto.SecretKey; import javax.crypto.SecretKeyFactory; import javax.crypto.spec.DESedeKeySpec; import org.bouncycastle.jce.provider.BouncyCastleProvider; import org.bouncycastle.util.encoders.Hex; public class TripleDESDemo { private static String src = "TestTripleDES"; public static void jdkTripleDES () { try { //生成密鑰Key KeyGenerator keyGenerator = KeyGenerator.getInstance("DESede"); keyGenerator.init(168); SecretKey secretKey = keyGenerator.generateKey(); byte[] bytesKey = secretKey.getEncoded(); //KEY轉(zhuǎn)換 DESedeKeySpec deSedeKeySpec = new DESedeKeySpec(bytesKey); SecretKeyFactory factory = SecretKeyFactory.getInstance("DESede"); Key convertSecretKey = factory.generateSecret(deSedeKeySpec); //加密 Cipher cipher = Cipher.getInstance("DESede/ECB/PKCS5Padding"); cipher.init(Cipher.ENCRYPT_MODE, convertSecretKey); byte[] encodeResult = cipher.doFinal(TripleDESDemo.src.getBytes()); System.out.println("TripleDESEncode :" + Hex.toHexString(encodeResult)); //解密 cipher.init(Cipher.DECRYPT_MODE,convertSecretKey); byte[] DecodeResult = cipher.doFinal(encodeResult); System.out.println("TripleDESDncode :" + new String (DecodeResult)); } catch (NoSuchAlgorithmException e) { e.printStackTrace(); } catch (InvalidKeyException e) { // TODO 自動生成的 catch 塊 e.printStackTrace(); } catch (InvalidKeySpecException e) { // TODO 自動生成的 catch 塊 e.printStackTrace(); } catch (NoSuchPaddingException e) { // TODO 自動生成的 catch 塊 e.printStackTrace(); } catch (IllegalBlockSizeException e) { // TODO 自動生成的 catch 塊 e.printStackTrace(); } catch (BadPaddingException e) { // TODO 自動生成的 catch 塊 e.printStackTrace(); } } public static void bcTripleDES () { try { Security.addProvider(new BouncyCastleProvider()); //生成密鑰Key KeyGenerator keyGenerator = KeyGenerator.getInstance("DESede","BC"); keyGenerator.getProvider(); keyGenerator.init(168); SecretKey secretKey = keyGenerator.generateKey(); byte[] bytesKey = secretKey.getEncoded(); //KEY轉(zhuǎn)換 DESedeKeySpec deSedeKeySpec = new DESedeKeySpec(bytesKey); SecretKeyFactory factory = SecretKeyFactory.getInstance("DESede"); Key convertSecretKey = factory.generateSecret(deSedeKeySpec); //加密 Cipher cipher = Cipher.getInstance("DESede/ECB/PKCS5Padding"); cipher.init(Cipher.ENCRYPT_MODE, convertSecretKey); byte[] encodeResult = cipher.doFinal(TripleDESDemo.src.getBytes()); System.out.println("TripleDESEncode :" + Hex.toHexString(encodeResult)); //解密 cipher.init(Cipher.DECRYPT_MODE,convertSecretKey); byte[] DecodeResult = cipher.doFinal(encodeResult); System.out.println("TripleDESDncode :" + new String (DecodeResult)); } catch (NoSuchAlgorithmException e) { e.printStackTrace(); } catch (InvalidKeyException e) { // TODO 自動生成的 catch 塊 e.printStackTrace(); } catch (InvalidKeySpecException e) { // TODO 自動生成的 catch 塊 e.printStackTrace(); } catch (NoSuchPaddingException e) { // TODO 自動生成的 catch 塊 e.printStackTrace(); } catch (IllegalBlockSizeException e) { // TODO 自動生成的 catch 塊 e.printStackTrace(); } catch (BadPaddingException e) { // TODO 自動生成的 catch 塊 e.printStackTrace(); } catch (NoSuchProviderException e) { // TODO 自動生成的 catch 塊 e.printStackTrace(); } } public static void main(String[] args) { jdkTripleDES (); bcTripleDES (); } }
4.AES
package com.tancky.security; import java.security.InvalidKeyException; import java.security.Key; import java.security.NoSuchAlgorithmException; import java.security.NoSuchProviderException; import java.security.SecureRandom; import java.security.Security; import javax.crypto.BadPaddingException; import javax.crypto.Cipher; import javax.crypto.IllegalBlockSizeException; import javax.crypto.KeyGenerator; import javax.crypto.NoSuchPaddingException; import javax.crypto.SecretKey; import javax.crypto.spec.SecretKeySpec; import org.bouncycastle.jce.provider.BouncyCastleProvider; import org.bouncycastle.util.encoders.Hex; public class AESDemo { private static String src = "TestAES"; public static void jdkAES (){ try { //生成Key KeyGenerator keyGenerator = KeyGenerator.getInstance("AES"); keyGenerator.init(128); //keyGenerator.init(128, new SecureRandom("seedseedseed".getBytes())); //使用上面這種初始化方法可以特定種子來生成密鑰,這樣加密后的密文是唯一固定的。 SecretKey secretKey = keyGenerator.generateKey(); byte[] keyBytes = secretKey.getEncoded(); //Key轉(zhuǎn)換 Key key = new SecretKeySpec(keyBytes, "AES"); //加密 Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding"); cipher.init(Cipher.ENCRYPT_MODE, key); byte[] encodeResult = cipher.doFinal(AESDemo.src.getBytes()); System.out.println("AESencode : " + Hex.toHexString(encodeResult) ); //解密 cipher.init(Cipher.DECRYPT_MODE, key); byte[] decodeResult = cipher.doFinal(encodeResult); System.out.println("AESdecode : " + new String (decodeResult)); } catch (NoSuchAlgorithmException e) { // TODO 自動生成的 catch 塊 e.printStackTrace(); } catch (NoSuchPaddingException e) { // TODO 自動生成的 catch 塊 e.printStackTrace(); } catch (InvalidKeyException e) { // TODO 自動生成的 catch 塊 e.printStackTrace(); } catch (IllegalBlockSizeException e) { // TODO 自動生成的 catch 塊 e.printStackTrace(); } catch (BadPaddingException e) { // TODO 自動生成的 catch 塊 e.printStackTrace(); } } public static void bcAES (){ try { //使用BouncyCastle 的DES加密 Security.addProvider(new BouncyCastleProvider()); //生成Key KeyGenerator keyGenerator = KeyGenerator.getInstance("AES","BC"); keyGenerator.getProvider(); keyGenerator.init(128); SecretKey secretKey = keyGenerator.generateKey(); byte[] keyBytes = secretKey.getEncoded(); //Key轉(zhuǎn)換 Key key = new SecretKeySpec(keyBytes, "AES"); //加密 Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding"); cipher.init(Cipher.ENCRYPT_MODE, key); byte[] encodeResult = cipher.doFinal(AESDemo.src.getBytes()); System.out.println("AESencode : " + Hex.toHexString(encodeResult) ); //解密 cipher.init(Cipher.DECRYPT_MODE, key); byte[] decodeResult = cipher.doFinal(encodeResult); System.out.println("AESdecode : " + new String (decodeResult)); } catch (NoSuchAlgorithmException e) { // TODO 自動生成的 catch 塊 e.printStackTrace(); } catch (NoSuchPaddingException e) { // TODO 自動生成的 catch 塊 e.printStackTrace(); } catch (InvalidKeyException e) { // TODO 自動生成的 catch 塊 e.printStackTrace(); } catch (IllegalBlockSizeException e) { // TODO 自動生成的 catch 塊 e.printStackTrace(); } catch (BadPaddingException e) { // TODO 自動生成的 catch 塊 e.printStackTrace(); } catch (NoSuchProviderException e) { // TODO 自動生成的 catch 塊 e.printStackTrace(); } } public static void main(String[] args) { jdkAES(); bcAES(); } }
看完上述內(nèi)容,你們掌握J(rèn)ava中有哪些加密與解密的方法的方法了嗎?如果還想學(xué)到更多技能或想了解更多相關(guān)內(nèi)容,歡迎關(guān)注創(chuàng)新互聯(lián)行業(yè)資訊頻道,感謝各位的閱讀!