这是源码
import java.security.*;
import javax.crypto.*;
import java.nio.*;
import javax.crypto.spec.SecretKeySpec;public class Des { private static final String Algorithm = "DESede"; //定义 加密算法,可用 DES,DESede,Blowfish
//keybyte为加密密钥,长度为24字节
//src为被加密的数据缓冲区(源)
public static byte[] encryptMode(byte[] keybyte, byte[] src) {
try {
//生成密钥
SecretKey deskey = new SecretKeySpec(keybyte, Algorithm); //加密
Cipher c1 = Cipher.getInstance(Algorithm);
c1.init(Cipher.ENCRYPT_MODE, deskey);
return c1.doFinal(src);
} catch (java.security.NoSuchAlgorithmException e1) {
e1.printStackTrace();
} catch (javax.crypto.NoSuchPaddingException e2) {
e2.printStackTrace();
} catch (java.lang.Exception e3) {
e3.printStackTrace();
}
return null;
}
public static byte[] encryptMode(byte[] keybyte,String strIn) {
int iLen = 8 - strIn.length() % 8; if (iLen != 8)
{
ByteBuffer buffer = ByteBuffer.allocate(strIn.length() + iLen);
buffer.put(strIn.getBytes());
strIn = new String(buffer.array());
buffer.clear();
return encryptMode(keybyte, buffer.array());
}
return encryptMode(keybyte, strIn.getBytes());
}
//keybyte为加密密钥,长度为24字节
//src为加密后的缓冲区
public static byte[] decryptMode(byte[] keybyte, byte[] src) {
try {
//生成密钥
SecretKey deskey = new SecretKeySpec(keybyte, Algorithm); //解密
Cipher c1 = Cipher.getInstance(Algorithm);
c1.init(Cipher.DECRYPT_MODE, deskey);
return c1.doFinal(src);
} catch (java.security.NoSuchAlgorithmException e1) {
e1.printStackTrace();
} catch (javax.crypto.NoSuchPaddingException e2) {
e2.printStackTrace();
} catch (java.lang.Exception e3) {
e3.printStackTrace();
}
return null;
}
/*
//转换成十六进制字符串
public static String byte2hex(byte[] b) {
String hs="";
String stmp=""; for (int n=0;n<b.length;n++) {
stmp=(java.lang.Integer.toHexString(b[n] & 0XFF));
if (stmp.length()==1) hs=hs+"0"+stmp;
else hs=hs+stmp;
if (n<b.length-1) hs=hs+":";
}
return hs.toUpperCase();
}
*/
public static void main(String[] args)
{
//添加新安全算法,如果用JCE就要把它添加进去
Security.addProvider(new com.sun.crypto.provider.SunJCE()); final byte[] keyBytes = {(byte)138,(byte)98,(byte)100,(byte)121,(byte)161,(byte)22,(byte)2,(byte)145,
(byte)199,(byte)234,(byte)185,(byte)188,(byte)41,(byte)182,(byte)56,(byte)199,
(byte)81,(byte)145,(byte)52,(byte)213,(byte)213,(byte)118,(byte)118,(byte)138}; //24字节的密钥
String szSrc = "12345678asdfg123";
System.out.println("加密前的字符串:" + szSrc);
byte[] encoded = encryptMode(keyBytes, szSrc);
System.out.println("加密后的字符串:" + new String(encoded));
System.out.println("len=" + encoded.length);
//byte[] test = {36, -22, 105, 100, -109, -16, 66, -117};//,11, -48, 67, 8 ,-72, 121 ,-45 ,-58
System.out.println("byte ="+encoded[0]+" "+encoded[1]+" "+encoded[2]+" "+encoded[3]+" "+encoded[4]+" "+encoded[5]+" "+encoded[6]+" "+encoded[7]);
System.out.println("byte ="+encoded[8]+" "+encoded[9]+" "+encoded[10]+" "+encoded[11]+" "+encoded[12]+" "+encoded[13]+" "+encoded[14]+" "+encoded[15]);
System.out.println("byte ="+encoded[8]+" "+encoded[16]+" "+encoded[17]+" "+encoded[18]+" "+encoded[19]+" "+encoded[20]+" "+encoded[21]+" "+encoded[22]);
byte[] srcBytes = decryptMode(keyBytes, encoded);
System.out.println("解密后的字符串:" + (new String(srcBytes)));
}
}
import java.security.*;
import javax.crypto.*;
import java.nio.*;
import javax.crypto.spec.SecretKeySpec;public class Des { private static final String Algorithm = "DESede"; //定义 加密算法,可用 DES,DESede,Blowfish
//keybyte为加密密钥,长度为24字节
//src为被加密的数据缓冲区(源)
public static byte[] encryptMode(byte[] keybyte, byte[] src) {
try {
//生成密钥
SecretKey deskey = new SecretKeySpec(keybyte, Algorithm); //加密
Cipher c1 = Cipher.getInstance(Algorithm);
c1.init(Cipher.ENCRYPT_MODE, deskey);
return c1.doFinal(src);
} catch (java.security.NoSuchAlgorithmException e1) {
e1.printStackTrace();
} catch (javax.crypto.NoSuchPaddingException e2) {
e2.printStackTrace();
} catch (java.lang.Exception e3) {
e3.printStackTrace();
}
return null;
}
public static byte[] encryptMode(byte[] keybyte,String strIn) {
int iLen = 8 - strIn.length() % 8; if (iLen != 8)
{
ByteBuffer buffer = ByteBuffer.allocate(strIn.length() + iLen);
buffer.put(strIn.getBytes());
strIn = new String(buffer.array());
buffer.clear();
return encryptMode(keybyte, buffer.array());
}
return encryptMode(keybyte, strIn.getBytes());
}
//keybyte为加密密钥,长度为24字节
//src为加密后的缓冲区
public static byte[] decryptMode(byte[] keybyte, byte[] src) {
try {
//生成密钥
SecretKey deskey = new SecretKeySpec(keybyte, Algorithm); //解密
Cipher c1 = Cipher.getInstance(Algorithm);
c1.init(Cipher.DECRYPT_MODE, deskey);
return c1.doFinal(src);
} catch (java.security.NoSuchAlgorithmException e1) {
e1.printStackTrace();
} catch (javax.crypto.NoSuchPaddingException e2) {
e2.printStackTrace();
} catch (java.lang.Exception e3) {
e3.printStackTrace();
}
return null;
}
/*
//转换成十六进制字符串
public static String byte2hex(byte[] b) {
String hs="";
String stmp=""; for (int n=0;n<b.length;n++) {
stmp=(java.lang.Integer.toHexString(b[n] & 0XFF));
if (stmp.length()==1) hs=hs+"0"+stmp;
else hs=hs+stmp;
if (n<b.length-1) hs=hs+":";
}
return hs.toUpperCase();
}
*/
public static void main(String[] args)
{
//添加新安全算法,如果用JCE就要把它添加进去
Security.addProvider(new com.sun.crypto.provider.SunJCE()); final byte[] keyBytes = {(byte)138,(byte)98,(byte)100,(byte)121,(byte)161,(byte)22,(byte)2,(byte)145,
(byte)199,(byte)234,(byte)185,(byte)188,(byte)41,(byte)182,(byte)56,(byte)199,
(byte)81,(byte)145,(byte)52,(byte)213,(byte)213,(byte)118,(byte)118,(byte)138}; //24字节的密钥
String szSrc = "12345678asdfg123";
System.out.println("加密前的字符串:" + szSrc);
byte[] encoded = encryptMode(keyBytes, szSrc);
System.out.println("加密后的字符串:" + new String(encoded));
System.out.println("len=" + encoded.length);
//byte[] test = {36, -22, 105, 100, -109, -16, 66, -117};//,11, -48, 67, 8 ,-72, 121 ,-45 ,-58
System.out.println("byte ="+encoded[0]+" "+encoded[1]+" "+encoded[2]+" "+encoded[3]+" "+encoded[4]+" "+encoded[5]+" "+encoded[6]+" "+encoded[7]);
System.out.println("byte ="+encoded[8]+" "+encoded[9]+" "+encoded[10]+" "+encoded[11]+" "+encoded[12]+" "+encoded[13]+" "+encoded[14]+" "+encoded[15]);
System.out.println("byte ="+encoded[8]+" "+encoded[16]+" "+encoded[17]+" "+encoded[18]+" "+encoded[19]+" "+encoded[20]+" "+encoded[21]+" "+encoded[22]);
byte[] srcBytes = decryptMode(keyBytes, encoded);
System.out.println("解密后的字符串:" + (new String(srcBytes)));
}
}
Cipher c1 = Cipher.getInstance(Algorithm+"/ECB/NoPadding");