bouncycastle(1) Use bouncy castle provider runtime

JCE is the short for The Java Cryptography Extension.

From this class, we can see the provider list of my JDK.
package com.sillycat.easycastle.tools;


import java.security.Provider;
import java.security.Security;
import java.util.Iterator;
import java.util.Set;


publicclass ProviderInformation {
publicstaticvoid main(String[] args) {
Provider[] providers = Security.getProviders();
for (int i = 0; i < providers.length; i++) {
Provider provider = providers[i];
System.out.println("Provider name: " + provider.getName());
System.out.println("Provider information: " + provider.getInfo());
System.out.println("Provider version: " + provider.getVersion());
Set<?> entries = provider.entrySet();
Iterator<?> iterator = entries.iterator();
while (iterator.hasNext()) {
System.out.println("Property entry: " + iterator.next());
}
}
}
}

And I use a test class to verify DES with bouncy castle:
package com.sillycat.easycastle.runner;

import java.security.InvalidKeyException;
import java.security.Key;
import java.security.NoSuchAlgorithmException;
import java.security.NoSuchProviderException;
import java.security.Security;

import javax.crypto.BadPaddingException;
import javax.crypto.Cipher;
import javax.crypto.IllegalBlockSizeException;
import javax.crypto.KeyGenerator;
import javax.crypto.NoSuchPaddingException;

import org.bouncycastle.jce.provider.BouncyCastleProvider;

public class DESEncryptAndDecrypt {
   
     private static final String JCE_PROVIDER_BC = "BC";
   
     public static void main(String[] args) {
          //Security.addProvider(new com.sun.crypto.provider.SunJCE());
          Security.addProvider(new BouncyCastleProvider());
          try {
               // "BC" is the name of the BouncyCastle provider
               KeyGenerator kg = KeyGenerator.getInstance("DES",JCE_PROVIDER_BC);
             
               Key key = kg.generateKey();
               Cipher cipher = Cipher.getInstance("DES",JCE_PROVIDER_BC);

               byte[] data = "Hello World!".getBytes();
               System.out.println("Original data : " + new String(data));

               cipher.init(Cipher.ENCRYPT_MODE, key);
               byte[] result = cipher.doFinal(data);
               System.out.println("Encrypted data: " + new String(result));

               cipher.init(Cipher.DECRYPT_MODE, key);
               byte[] original = cipher.doFinal(result);
               System.out.println("Decrypted data: " + new String(original));
          } catch (NoSuchAlgorithmException e) {
               e.printStackTrace();
          } catch (NoSuchPaddingException e) {
               e.printStackTrace();
          } catch (InvalidKeyException e) {
               e.printStackTrace();
          } catch (IllegalStateException e) {
               e.printStackTrace();
          } catch (IllegalBlockSizeException e) {
               e.printStackTrace();
          } catch (BadPaddingException e) {
               e.printStackTrace();
          } catch (NoSuchProviderException e) {
               // TODO Auto-generated catch block
               e.printStackTrace();
          }
     }
}

I import the package in pom.xml like this:
<dependency>
  <groupId>bouncycastle</groupId>
  <artifactId> bcprov-jdk16</artifactId>
  <version> 140</version>
</dependency>

references:
http://www.bouncycastle.org
http://www.bouncycastle.org/specifications.html#install
http://hi.baidu.com/bluewhale84/blog/item/f3bb20a1f538a9884710648c.html
http://security.group.iteye.com/group/wiki/2280-Non-symmetric-encryption-Digital-Signature
http://snowolf.iteye.com/blog/379860
http://sillycat.iteye.com/blog/563515