关于Java中常用加密/解密方法的实现

package mytest; 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 = "43312319791130094X"; public static void jdkTripleDES () { try { //生成密钥Key KeyGenerator keyGenerator = KeyGenerator.getInstance("DESede"); keyGenerator.init(168); SecretKey secretKey = keyGenerator.generateKey(); byte[] bytesKey = secretKey.getEncoded(); //KEY转换 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 自动生成的 catch 块 e.printStackTrace(); } catch (InvalidKeySpecException e) { // TODO 自动生成的 catch 块 e.printStackTrace(); } catch (NoSuchPaddingException e) { // TODO 自动生成的 catch 块 e.printStackTrace(); } catch (IllegalBlockSizeException e) { // TODO 自动生成的 catch 块 e.printStackTrace(); } catch (BadPaddingException e) { // TODO 自动生成的 catch 块 e.printStackTrace(); } } public static void bcTripleDES () { try { Security.addProvider(new BouncyCastleProvider()); //生成密钥Key KeyGenerator keyGenerator = KeyGenerator.getInstance("DESede","BC"); keyGenerator.getProvider(); keyGenerator.init(168); SecretKey secretKey = keyGenerator.generateKey(); byte[] bytesKey = secretKey.getEncoded(); //KEY转换 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 自动生成的 catch 块 e.printStackTrace(); } catch (InvalidKeySpecException e) { // TODO 自动生成的 catch 块 e.printStackTrace(); } catch (NoSuchPaddingException e) { // TODO 自动生成的 catch 块 e.printStackTrace(); } catch (IllegalBlockSizeException e) { // TODO 自动生成的 catch 块 e.printStackTrace(); } catch (BadPaddingException e) { // TODO 自动生成的 catch 块 e.printStackTrace(); } catch (NoSuchProviderException e) { // TODO 自动生成的 catch 块 e.printStackTrace(); } } public static void main(String[] args) { jdkTripleDES (); bcTripleDES (); } }