JAVA 經常使用加密方法

時間 2019-11-19

標籤 java 經常使用加密方法欄目 Java 简体版

原文原文鏈接

1.Base64
加密：org.apache.commons.codec.binary.Base64.encodeBase64(byte[] binaryData)
解密：org.apache.commons.codec.binary.Base64.decodeBase64(byte[] base64Data)
2.Md5
加密：org.apache.commons.codec.digest.md5Hex(byte[] data)
解密：無
3.DES（des-ecb,3des,des-cbc,cbc-mac）java

[java] view plain copy算法

import java.io.ByteArrayOutputStream;
import java.security.SecureRandom;
import java.util.Arrays;
import javax.crypto.Cipher;
import javax.crypto.SecretKey;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.DESKeySpec;
import javax.crypto.spec.DESedeKeySpec;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;
import org.bouncycastle.crypto.BlockCipher;
import org.bouncycastle.crypto.Mac;
import org.bouncycastle.crypto.engines.DESEngine;
import org.bouncycastle.crypto.macs.CBCBlockCipherMac;
import org.bouncycastle.crypto.params.KeyParameter;
import com.alibaba.common.lang.StringUtil;
import com.huateng.commons.lang.convert.HexUtils;
public class ShfftDes {
//驗證用密鑰
private byte[] key = "000000000000000000000000".getBytes();
// private byte[] key = Hex.decode("00000000");
private byte[] ivs = new byte[] { 0, 0, 0, 0, 0, 0, 0, 0 };
private static final String DES_EDE = "DESede/ECB/NoPadding"; //定義加密算法,可用 DES,DESede,Blowfish //keybyte爲加密密鑰，長度爲24字節 //src爲被加密的數據緩衝區（源）
private static final String DES_EDE_CBC = "DESede/CBC/NoPadding"; //定義加密算法,可用 DES,DESede,Blowfish //keybyte爲加密密鑰，長度爲24字節 //src爲被加密的數據緩衝區（源）
private static final String DES_CBC = "DES/CBC/NoPadding";
private static final String DES_ECB = "DES/ECB/PKCS5Padding";
/**
* 使用DES_ECB方法進行加密
* @param content 需加密內容
* @param key 加密的密鑰
* @param mode 加密仍是解密
* @return
* @throws Exception
*/
public byte[] CryptByDes(byte[] content, int mode) throws Exception {
Cipher cipher = Cipher.getInstance(DES_ECB);
SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
SecretKey secretKey = keyFactory.generateSecret(new DESKeySpec(key));
cipher.init(mode, secretKey);
return cipher.doFinal(content);
}
/**
* 使用3DES方法進行加密
* @param content 需加密內容
* @param key 加密的密鑰
* @param mode 加密仍是解密
* @return
* @throws Exception
*/
public byte[] CryptBy3Des(byte[] content, int mode) throws Exception {
Cipher cipher = Cipher.getInstance(DES_EDE);
SecretKey secretKey = new SecretKeySpec(key, "DESede");
cipher.init(mode, secretKey);
return cipher.doFinal(content);
}
/**
* 使用DES_CBC方法進行加密
* @param content 需加密內容
* @param key 加密的密鑰
* @param mode 加密仍是解密
* @return
* @throws Exception
*/
public byte[] CryptByDesCbc(byte[] content, int mode) throws Exception {
Cipher cipher = Cipher.getInstance(DES_CBC);
SecretKey secureKey = new SecretKeySpec(key, "DES");
IvParameterSpec iv = new IvParameterSpec(ivs);
cipher.init(mode, secureKey, iv);
return cipher.doFinal(HexUtils.fromHex(new String(content)));
}
/**
* 使用3DES_CBC方法進行加密
* @param content 需加密內容
* @param key 加密的密鑰
* @param mode 加密仍是解密
* @return
* @throws Exception
*/
public byte[] CryptBy3DesCbc(byte[] content, int mode) throws Exception {
Cipher cipher = Cipher.getInstance(DES_EDE_CBC);
SecretKey secureKey = new SecretKeySpec(key, "DESede");
IvParameterSpec iv = new IvParameterSpec(ivs);
cipher.init(mode, secureKey, iv);
return cipher.doFinal(content);
}
/**
* CBC的MAC加密
* @param content
* @param mode
* @return
* @throws Exception
*/
public byte[] CryptByDesCbcMac(byte[] content) throws Exception {
BlockCipher engine = new DESEngine();
Mac mac = new CBCBlockCipherMac(engine, 64);
byte[] macText = new byte[engine.getBlockSize()];
mac.init(new KeyParameter(key));
mac.update(Padding(content, 64), 0, content.length);
mac.update(content, 0, content.length);
mac.doFinal(macText, 0);
return macText;
}
/**
* CBC的MAC加密
* @param content
* @param mode
* @return
* @throws Exception
*/
public byte[] ShFftCryptByDessdsCbc(byte[] content, int mode) throws Exception {
byte[] ks1 = HexUtils.fromHex(new String(key));
byte[] ks = new byte[24];
System.arraycopy(ks1, 0, ks, 0, ks1.length);
System.arraycopy(ks1, 0, ks, ks1.length, 8);
Cipher cipher = Cipher.getInstance(DES_EDE_CBC);
SecretKeyFactory keyFactory = null;
keyFactory = SecretKeyFactory.getInstance("DESede");
SecretKey secretKey = null;
secretKey = keyFactory.generateSecret(new DESedeKeySpec(ks));
IvParameterSpec iv = new IvParameterSpec(new byte[] { 0, 0, 0, 0, 0, 0, 0, 0 });
cipher.init(mode, secretKey, iv);
return cipher.doFinal(HexUtils.fromHex(new String(content)));
}
public byte[] mac(byte[] content) throws Exception {
int len;
byte plainData[];
byte encryptedData[];
len = (content.length / 8 + (content.length % 8 != 0 ? 1 : 0)) * 8;
plainData = new byte[len];
encryptedData = new byte[8];
Arrays.fill(plainData, (byte) 32);
System.arraycopy(content, 0, plainData, 0, content.length);
SecureRandom sr = new SecureRandom();
DESKeySpec dks = new DESKeySpec(key);
SecretKeyFactory keyFactory = null;
keyFactory = SecretKeyFactory.getInstance("DES");
SecretKey secretKey = keyFactory.generateSecret(dks);
Cipher cipher = Cipher.getInstance("DES/CBC/NoPadding");
IvParameterSpec iv = new IvParameterSpec(new byte[] { 0, 0, 0, 0, 0, 0, 0, 0 });
cipher.init(1, secretKey, iv, sr);
System.arraycopy(cipher.doFinal(plainData), len - 8, encryptedData, 0, 8);
return encryptedData;
}
/**
* 根據傳入參數進行空格填充
* @param content 須要填充的內容
* @param block 填充的分塊大小
* @return
*/
public byte[] Padding(byte[] content, int block) {
int contentLength = content.length;
int mod = contentLength % block;
if (mod != 0) {
int size = contentLength + block - mod;
// String s = new String(content);
// StringUtil.alignLeft(s, size, " ");
byte[] s = new byte[size];
System.arraycopy(content, 0, s, 0, content.length);
for (int i = content.length; i < size; i++) {
s[i] = 32;
}
return s;
}
return content;
}
/**
* 根據傳入參數進行空格填充
* @param content 須要填充的內容
* @param block 填充的分塊大小
* @return
*/
public String Padding(String content, int block) {
int contentLength = content.length();
int mod = contentLength % block;
if (mod != 0) {
int size = contentLength + block - mod;
String s = new String(content);
StringUtil.alignLeft(s, size, " ");
return s;
}
return content;
}
/**
* 打印byte數據
* @param bs
*/
public void println(byte[] bs) {
for (byte b : bs) {
System.out.print(b + " ");
}
System.out.println();
}
/**
* 打印無符號byte數組
* @param bs
*/
public void printlnByte(byte[] bs) {
for (byte b : bs) {
if (b < 0) {
System.out.print((int) b + 256 + " ");
} else {
System.out.print(b + " ");
}
}
System.out.println();
}
/**
* 以16進制形式打印BYTE數組
* @param bs
*/
public void printlnByteInt16(byte[] bs) {
for (byte b : bs) {
System.out.print(Integer.toHexString((int) b) + " ");
}
System.out.println();
}
/**
* 將byte數組按1個byte分解爲2個字符
* @param bytes
* @return
*/
public String dumpBytes(byte[] bytes) {
int i;
StringBuffer sb = new StringBuffer();
for (i = 0; i < bytes.length; i++) {
int n = bytes[i] >= 0 ? bytes[i] : 256 + bytes[i];
String s = Integer.toHexString(n);
if (s.length() < 2) {
s = "0" + s;
}
if (s.length() > 2) {
s = s.substring(s.length() - 2);
}
sb.append(s);
}
return sb.toString().toUpperCase();
//return new BASE64Encoder().encode(bytes);
}
// 一下程序將每2位16進制整數組裝成一個字節
private String hexString = "0123456789ABCDEF";
public byte[] decode(String bytes) {
ByteArrayOutputStream baos = new ByteArrayOutputStream(bytes.length() / 2);
for (int i = 0; i < bytes.length(); i += 2)
baos.write((hexString.indexOf(bytes.charAt(i)) << 4 | hexString.indexOf(bytes
.charAt(i + 1))));
return baos.toByteArray();
}
public byte[] getKey() {
return key;
}
public void setKey(byte[] key) {
this.key = key;
}
public byte[] getIvs() {
return ivs;
}
public void setIvs(byte[] ivs) {
this.ivs = ivs;
}
}