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aofengaofeng
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1、重构：只提供加密和解密操作，具体的灱操作由具体的子类实现。
2、完善注释。
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‎src/cn/aofeng/demo/encrypt/EncryptAndDecrypt.java‎

Lines changed: 61 additions & 92 deletions
Original file line numberDiff line numberDiff line change
@@ -13,10 +13,6 @@
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import javax.crypto.spec.IvParameterSpec;
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import javax.crypto.spec.SecretKeySpec;
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import org.apache.commons.codec.binary.Base64;
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import static cn.aofeng.demo.util.LogUtil.log;;
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2016
/**
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* 加密与解密。
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*
@@ -25,123 +21,96 @@
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public class EncryptAndDecrypt {
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private final static String CHARSET = "utf8";
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private SecretKey createSecretKey(String encryptType, String keyStr)
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/**
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* 创建安全密钥。
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*
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* @param encryptType
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* 加密方式，如：AES，Blowfish。详情查看<a href="https://docs.oracle.com/javase/7/docs/technotes/guides/security/StandardNames.html#Cipher">Java Cryptography Architecture Standard Algorithm Name Documentation</a>
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* @param keyStr
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* 密钥明文
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* @return 安全密钥
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* @throws UnsupportedEncodingException
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* 不支持指定的字符集编码
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*/
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public SecretKey createSecretKey(String encryptType, String keyStr)
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throws UnsupportedEncodingException {
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byte[] secretKeyData = keyStr.getBytes(CHARSET);
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SecretKeySpec sks = new SecretKeySpec(secretKeyData, encryptType);
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return sks;
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}
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private byte[] encrypt(String encryptType, SecretKey secretKey, String srcData)
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throws InvalidKeyException, IllegalBlockSizeException,
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BadPaddingException, UnsupportedEncodingException,
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NoSuchAlgorithmException, NoSuchPaddingException,
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InvalidAlgorithmParameterException {
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/**
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* 加密数据。
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*
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* @param encryptType 加密方式，如：AES，Blowfish。详情查看<a href="https://docs.oracle.com/javase/7/docs/technotes/guides/security/StandardNames.html#Cipher">Java Cryptography Architecture Standard Algorithm Name Documentation</a>
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* @param secretKey 密钥
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* @param srcData 待加密的数据
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* @return 数据加密后的字节数组
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* @see #encrypt(String, SecretKey, String, String)
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*/
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public byte[] encrypt(String encryptType, SecretKey secretKey,
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String srcData) throws InvalidKeyException,
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IllegalBlockSizeException, BadPaddingException,
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UnsupportedEncodingException, NoSuchAlgorithmException,
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NoSuchPaddingException, InvalidAlgorithmParameterException {
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return encrypt(encryptType, secretKey, srcData, null);
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}
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private byte[] encrypt(String encryptType, SecretKey secretKey, String srcData, String algorithmParam)
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throws InvalidKeyException, IllegalBlockSizeException,
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BadPaddingException, UnsupportedEncodingException,
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NoSuchAlgorithmException, NoSuchPaddingException,
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InvalidAlgorithmParameterException {
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public byte[] encrypt(String encryptType, SecretKey secretKey,
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String srcData, String algorithmParam) throws InvalidKeyException,
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IllegalBlockSizeException, BadPaddingException,
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UnsupportedEncodingException, NoSuchAlgorithmException,
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NoSuchPaddingException, InvalidAlgorithmParameterException {
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Cipher encrpyt = Cipher.getInstance(encryptType);
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if (null == algorithmParam) {
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encrpyt.init(Cipher.ENCRYPT_MODE, secretKey);
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} else {
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IvParameterSpec iv = new IvParameterSpec(algorithmParam.getBytes(CHARSET));
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IvParameterSpec iv = new IvParameterSpec(
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algorithmParam.getBytes(CHARSET));
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encrpyt.init(Cipher.ENCRYPT_MODE, secretKey, iv);
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}
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byte[] secretData = encrpyt.doFinal(srcData.getBytes(CHARSET));
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return secretData;
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}
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private String decrypt(String decryptType, SecretKey secretKey, byte[] secretData)
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throws InvalidKeyException, IllegalBlockSizeException,
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BadPaddingException, UnsupportedEncodingException,
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NoSuchAlgorithmException, NoSuchPaddingException,
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InvalidAlgorithmParameterException {
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/**
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* 解密数据。
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*
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* @param decryptType 解密方式，如：AES，Blowfish。详情查看<a href="https://docs.oracle.com/javase/7/docs/technotes/guides/security/StandardNames.html#Cipher">Java Cryptography Architecture Standard Algorithm Name Documentation</a>
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* @param secretKey 密钥
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* @param secretData 待解密的数据
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* @return 解密后的数据
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* @see #decrypt(String, SecretKey, byte[], String)
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*/
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public String decrypt(String decryptType, SecretKey secretKey,
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byte[] secretData) throws InvalidKeyException,
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IllegalBlockSizeException, BadPaddingException,
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UnsupportedEncodingException, NoSuchAlgorithmException,
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NoSuchPaddingException, InvalidAlgorithmParameterException {
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return decrypt(decryptType, secretKey, secretData, null);
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}
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private String decrypt(String decryptType, SecretKey secretKey, byte[] secretData, String algorithmParam)
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public String decrypt(String decryptType, SecretKey secretKey,
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byte[] secretData, String algorithmParam)
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throws InvalidKeyException, IllegalBlockSizeException,
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BadPaddingException, UnsupportedEncodingException,
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NoSuchAlgorithmException, NoSuchPaddingException,
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NoSuchAlgorithmException, NoSuchPaddingException,
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InvalidAlgorithmParameterException {
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Cipher decrypt = Cipher.getInstance(decryptType);
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if (null == algorithmParam) {
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decrypt.init(Cipher.DECRYPT_MODE, secretKey);
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} else {
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IvParameterSpec iv = new IvParameterSpec(algorithmParam.getBytes(CHARSET));
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IvParameterSpec iv = new IvParameterSpec(
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algorithmParam.getBytes(CHARSET));
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decrypt.init(Cipher.DECRYPT_MODE, secretKey, iv);
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}
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byte[] srcData = decrypt.doFinal(secretData);
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byte[] srcData = decrypt.doFinal(secretData);
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String srcStr = new String(srcData, CHARSET);
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return srcStr;
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}
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private void blowfishPerformence(String data)
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throws UnsupportedEncodingException, InvalidKeyException,
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IllegalBlockSizeException, BadPaddingException,
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NoSuchAlgorithmException, NoSuchPaddingException,
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InvalidAlgorithmParameterException {
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SecretKey secretKey;
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String type = "Blowfish";
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secretKey = createSecretKey(type, "abcdefgh_1234567");
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long startTime = System.currentTimeMillis();
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for (int j = 0; j < 100000; j++) {
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encrypt(type, secretKey, data+j);
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}
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long endTime = System.currentTimeMillis();
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long usedTime = endTime - startTime;
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log("使用%s进行%d次加密消耗时间%d毫秒", type, 100000, usedTime);
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}
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private void aesPerformence(String data)
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throws UnsupportedEncodingException, InvalidKeyException,
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IllegalBlockSizeException, BadPaddingException,
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NoSuchAlgorithmException, NoSuchPaddingException,
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InvalidAlgorithmParameterException {
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SecretKey secretKey;
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String type = "AES/CBC/PKCS5Padding";
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secretKey = createSecretKey("AES", "abcdefgh_1234567");
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long startTime = System.currentTimeMillis();
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for (int j = 0; j < 100000; j++) {
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encrypt(type, secretKey, data+j, "abcdefgh12345678");
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}
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long endTime = System.currentTimeMillis();
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long usedTime = endTime - startTime;
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log("使用%s进行%d次加密消耗时间%d毫秒", type, 100000, usedTime);
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}
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public static void main(String[] args) throws NoSuchAlgorithmException,
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NoSuchPaddingException, UnsupportedEncodingException,
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InvalidKeyException, IllegalBlockSizeException,
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BadPaddingException, InvalidAlgorithmParameterException {
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String data = "炎黄，汉字，english,do it,abcdefghijklmnopqrstuvwxyz,0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ, ~!@#$%^&*()_+=-";
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log("待加密的数据：\n%s", data);
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String encryptType = "Blowfish";
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EncryptAndDecrypt bf = new EncryptAndDecrypt();
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SecretKey secretKey = bf.createSecretKey(encryptType, "abcdefgh_1234567");
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byte[] secretData = bf.encrypt(encryptType, secretKey, data);
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log("使用%s加密后的数据：", encryptType);
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log(Base64.encodeBase64String(secretData));
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String srcStr = bf.decrypt(encryptType, secretKey, secretData);
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log("解密后的数据：\n%s", srcStr);
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// ==========性能测试==========
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// AES
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bf.aesPerformence(data);
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// Blowfish
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bf.blowfishPerformence(data);
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}
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}

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