java.security.NoSuchAlgorithmException: Algorithm DES not available
代码：import java.security.*;
import javax.crypto.*;
/**
* @author ANDY
*
* 更改所生成类型注释的模板为
* 窗口 > 首选项 > Java > 代码生成 > 代码和注释
*/
/*
安全程序 DESede/DES测试
*/
public class DESTest {
//
public static void main(String[] args){
DESTest my=new DESTest();
my.run();
}
//
public void run() {
//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());
String Algorithm="AES"; //定义 加密算法,可用 DES,DESede,Blowfish
String myinfo="要加密的信息";
try {
//生成密钥
KeyGenerator keygen = KeyGenerator.getInstance(Algorithm);
SecretKey deskey = keygen.generateKey();
//加密
System.out.println("加密前的二进串:"+byte2hex(myinfo.getBytes()));
System.out.println("加密前的信息:"+myinfo);
Cipher c1 = Cipher.getInstance(Algorithm);
c1.init(Cipher.ENCRYPT_MODE,deskey);
byte[] cipherByte=c1.doFinal(myinfo.getBytes());
System.out.println("加密后的二进串:"+byte2hex(cipherByte));
//解密
c1 = Cipher.getInstance(Algorithm);
c1.init(Cipher.DECRYPT_MODE,deskey);
byte[] clearByte=c1.doFinal(cipherByte);
System.out.println("解密后的二进串:"+byte2hex(clearByte));
System.out.println("解密后的信息:"+(new String(clearByte)));
} catch (java.security.NoSuchAlgorithmException e1) {
e1.printStackTrace();
} catch (javax.crypto.NoSuchPaddingException e2) {
e2.printStackTrace();
} catch (java.lang.Exception e3) {
e3.printStackTrace();
}
}
// 二行制转字符串
public 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();
}
}
错误：
java.security.NoSuchAlgorithmException: Algorithm AES not available
at javax.crypto.SunJCE_b.a(DashoA6275)
at javax.crypto.KeyGenerator.getInstance(DashoA6275)
at com.DESTest.run(DESTest.java:37)
at com.DESTest.main(DESTest.java:26)
环境:
j2sdk1.4.2_05
eclipse 把“DES”改为“AES”，“RSA”，“DESede”或“Blowfish”，也是如此。
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