add aes main source
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sharifi
parent
cb48f0bd64
commit
01baf5c752
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package com.baeldung.crypto;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import javax.crypto.*;
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import javax.crypto.spec.IvParameterSpec;
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import javax.crypto.spec.PBEKeySpec;
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import javax.crypto.spec.SecretKeySpec;
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import java.io.*;
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import java.security.InvalidAlgorithmParameterException;
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import java.security.InvalidKeyException;
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import java.security.NoSuchAlgorithmException;
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import java.security.SecureRandom;
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import java.security.spec.InvalidKeySpecException;
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import java.security.spec.KeySpec;
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import java.util.Base64;
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public class AESUtil {
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static Logger logger = LoggerFactory.getLogger(AESUtil.class);
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public static String encrypt(String algorithm, String input, SecretKey key, IvParameterSpec iv) {
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try {
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Cipher cipher = Cipher.getInstance(algorithm);
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cipher.init(Cipher.ENCRYPT_MODE, key, iv);
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byte[] cipherText = cipher.doFinal(input.getBytes());
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return Base64.getEncoder().encodeToString(cipherText);
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} catch (NoSuchAlgorithmException | NoSuchPaddingException
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| InvalidKeyException | InvalidAlgorithmParameterException
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| IllegalBlockSizeException | BadPaddingException exp) {
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logger.error(exp.getMessage());
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}
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return null;
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}
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public static String decrypt(String algorithm, String cipherText, SecretKey key, IvParameterSpec iv) {
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try {
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Cipher cipher = Cipher.getInstance(algorithm);
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cipher.init(Cipher.DECRYPT_MODE, key, iv);
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byte[] plainText = cipher.doFinal(Base64.getDecoder().decode(cipherText));
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return new String(plainText);
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} catch (NoSuchAlgorithmException | NoSuchPaddingException
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| InvalidKeyException | InvalidAlgorithmParameterException
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| IllegalBlockSizeException | BadPaddingException exp) {
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logger.error(exp.getMessage());
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}
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return null;
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}
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public static SecretKey generateKey(int n) throws NoSuchAlgorithmException {
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KeyGenerator keyGenerator = KeyGenerator.getInstance("AES");
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keyGenerator.init(n);
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SecretKey key = keyGenerator.generateKey();
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return key;
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}
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public static SecretKey getKeyFromPassword(String password, String salt)
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throws NoSuchAlgorithmException, InvalidKeySpecException {
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SecretKeyFactory factory = SecretKeyFactory.getInstance("PBKDF2WithHmacSHA256");
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KeySpec spec = new PBEKeySpec(password.toCharArray(), salt.getBytes(), 65536, 256);
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SecretKey secret = new SecretKeySpec(factory.generateSecret(spec).getEncoded(), "AES");
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return secret;
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}
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public static IvParameterSpec generateIv() {
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byte[] iv = new byte[16];
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new SecureRandom().nextBytes(iv);
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return new IvParameterSpec(iv);
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}
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public static void encryptFile(String algorithm, SecretKey key, IvParameterSpec iv
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, File inputFile, File outputFile) throws IOException {
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try {
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Cipher cipher = Cipher.getInstance(algorithm);
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cipher.init(Cipher.ENCRYPT_MODE, key, iv);
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FileInputStream inputStream = new FileInputStream(inputFile);
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FileOutputStream outputStream = new FileOutputStream(outputFile);
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byte[] buffer = new byte[64];
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int bytesRead;
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while ((bytesRead = inputStream.read(buffer)) != -1) {
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byte[] output = cipher.update(buffer, 0, bytesRead);
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if (output != null) {
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outputStream.write(output);
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}
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}
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byte[] outputBytes = cipher.doFinal();
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if (outputBytes != null) {
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outputStream.write(outputBytes);
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}
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inputStream.close();
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outputStream.close();
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} catch (InvalidAlgorithmParameterException | NoSuchAlgorithmException
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| NoSuchPaddingException | BadPaddingException
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| IllegalBlockSizeException | InvalidKeyException exp) {
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logger.error(exp.getMessage());
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}
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}
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public static void decryptFile(String algorithm, SecretKey key, IvParameterSpec iv
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, File encryptedFile, File decryptedFile) throws IOException {
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try {
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Cipher cipher = Cipher.getInstance(algorithm);
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cipher.init(Cipher.DECRYPT_MODE, key, iv);
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FileInputStream inputStream = new FileInputStream(encryptedFile);
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FileOutputStream outputStream = new FileOutputStream(decryptedFile);
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byte[] buffer = new byte[64];
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int bytesRead;
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while ((bytesRead = inputStream.read(buffer)) != -1) {
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byte[] output = cipher.update(buffer, 0, bytesRead);
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if (output != null) {
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outputStream.write(output);
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}
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}
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byte[] output = cipher.doFinal();
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if (output != null) {
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outputStream.write(output);
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}
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inputStream.close();
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outputStream.close();
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} catch (InvalidAlgorithmParameterException | NoSuchAlgorithmException
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| NoSuchPaddingException | BadPaddingException
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| IllegalBlockSizeException | InvalidKeyException exp) {
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logger.error(exp.getMessage());
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}
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}
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public static SealedObject encryptObject(String algorithm, Serializable object, SecretKey key, IvParameterSpec iv) {
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try {
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Cipher cipher = Cipher.getInstance(algorithm);
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cipher.init(Cipher.ENCRYPT_MODE, key, iv);
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SealedObject sealedObject = new SealedObject(object, cipher);
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return sealedObject;
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} catch (NoSuchAlgorithmException | NoSuchPaddingException
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| InvalidKeyException | InvalidAlgorithmParameterException
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| IOException | IllegalBlockSizeException exp) {
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logger.error(exp.getMessage());
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}
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return null;
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}
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public static Serializable decryptObject(String algorithm, SealedObject sealedObject
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, SecretKey key, IvParameterSpec iv) {
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try {
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Cipher cipher = Cipher.getInstance(algorithm);
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cipher.init(Cipher.DECRYPT_MODE, key, iv);
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Serializable unsealObject = (Serializable) sealedObject.getObject(cipher);
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return unsealObject;
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} catch (NoSuchAlgorithmException | NoSuchPaddingException
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| InvalidKeyException | InvalidAlgorithmParameterException
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| IOException | ClassNotFoundException | IllegalBlockSizeException
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| BadPaddingException exp) {
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logger.error(exp.getMessage());
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}
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return null;
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}
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public static String encryptPasswordBased(String plainText, SecretKey key, IvParameterSpec iv) {
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try {
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Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
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cipher.init(Cipher.ENCRYPT_MODE, key, iv);
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return Base64.getEncoder().encodeToString(cipher.doFinal(plainText.getBytes()));
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} catch (NoSuchAlgorithmException | BadPaddingException
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| InvalidKeyException | InvalidAlgorithmParameterException
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| NoSuchPaddingException | IllegalBlockSizeException exp) {
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logger.error(exp.getMessage());
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}
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return null;
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}
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public static String decryptPasswordBased(String cipherText, SecretKey key, IvParameterSpec iv) {
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try {
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Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5PADDING");
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cipher.init(Cipher.DECRYPT_MODE, key, iv);
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return new String(cipher.doFinal(Base64.getDecoder().decode(cipherText)));
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} catch (NoSuchAlgorithmException | BadPaddingException
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| InvalidKeyException | InvalidAlgorithmParameterException
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| NoSuchPaddingException | IllegalBlockSizeException exp) {
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logger.error(exp.getMessage());
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}
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return null;
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}
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}
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@ -0,0 +1,29 @@
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package com.baeldung.crypto;
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import java.io.Serializable;
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public class Student implements Serializable {
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private String name;
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private int age;
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public Student(String name, int age) {
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this.name = name;
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this.age = age;
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}
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public String getName() {
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return name;
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}
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public void setName(String name) {
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this.name = name;
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}
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public int getAge() {
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return age;
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}
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public void setAge(int age) {
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this.age = age;
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}
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}
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@ -0,0 +1,89 @@
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package com.baeldung.crypto;
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import org.assertj.core.api.WithAssertions;
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import org.junit.jupiter.api.Assertions;
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import org.junit.jupiter.api.Test;
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import javax.crypto.*;
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import javax.crypto.spec.IvParameterSpec;
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import java.io.File;
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import java.io.IOException;
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import java.nio.file.Paths;
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import java.security.NoSuchAlgorithmException;
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import java.security.spec.InvalidKeySpecException;
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//@SpringBootTest
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class AESUtilUnitTest implements WithAssertions {
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@Test
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void contextLoads() {
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}
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@Test
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void givenString_whenEncrypt_thenSuccess() throws NoSuchAlgorithmException {
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// given
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String input = "baeldung";
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SecretKey key = AESUtil.generateKey(128);
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IvParameterSpec ivParameterSpec = AESUtil.generateIv();
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String algorithm = "AES/CBC/PKCS5Padding";
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// when
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String cipherText = AESUtil.encrypt(algorithm, input, key, ivParameterSpec);
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String plainText = AESUtil.decrypt(algorithm, cipherText, key, ivParameterSpec);
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// then
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Assertions.assertEquals(input, plainText);
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}
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@Test
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void givenFile_whenEncrypt_thenSuccess() throws NoSuchAlgorithmException, IOException {
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// given
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SecretKey key = AESUtil.generateKey(128);
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String algorithm = "AES/CBC/PKCS5Padding";
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IvParameterSpec ivParameterSpec = AESUtil.generateIv();
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File inputFile = Paths.get("src/test/resources/baeldung.txt").toFile();
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File encryptedFile = new File("classpath:baeldung.encrypted");
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File decryptedFile = new File("document.decrypted");
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// when
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AESUtil.encryptFile(algorithm, key, ivParameterSpec, inputFile, encryptedFile);
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AESUtil.decryptFile(algorithm, key, ivParameterSpec, encryptedFile, decryptedFile);
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// then
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assertThat(inputFile).hasSameTextualContentAs(decryptedFile);
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}
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@Test
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void givenObject_whenEncrypt_thenSuccess() throws NoSuchAlgorithmException {
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// given
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Student student = new Student("Baeldung", 20);
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SecretKey key = AESUtil.generateKey(128);
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IvParameterSpec ivParameterSpec = AESUtil.generateIv();
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String algorithm = "AES/CBC/PKCS5Padding";
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// when
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SealedObject sealedObject = AESUtil.encryptObject(algorithm, student, key, ivParameterSpec);
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Student object = (Student) AESUtil.decryptObject(algorithm, sealedObject, key, ivParameterSpec);
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// then
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assertThat(student).isEqualToComparingFieldByField(object);
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}
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@Test
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void givenPassword_whenEncrypt_thenSuccess() throws InvalidKeySpecException, NoSuchAlgorithmException {
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// given
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String plainText = "www.baeldung.com";
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String password = "baeldung";
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String salt = "12345678";
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IvParameterSpec ivParameterSpec = AESUtil.generateIv();
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SecretKey key = AESUtil.getKeyFromPassword(password,salt);
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// when
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String cipherText = AESUtil.encryptPasswordBased(plainText, key, ivParameterSpec);
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String decryptedCipherText = AESUtil.decryptPasswordBased(cipherText, key, ivParameterSpec);
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// then
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Assertions.assertEquals(plainText, decryptedCipherText);
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}
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}
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