james邮件服务器对用户密码加密

   james邮件服务器对用户的密码进行了加密。

   默认使用的方式是“SHA”。

   可以找到加密和解密的源码

package org.apache.james.security;
import javax.mail.MessagingException;
import javax.mail.internet.MimeUtility;
import java.io.ByteArrayOutputStream;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.Locale;
public class DigestUtil {
    public static void main(String[] args) {
        //...
    }
                            
    public static void printUsage() {
        //...
    }
    public static void digestFile(String filename, String algorithm) {
        byte[] b = new byte[65536];
        int count = 0;
        int read = 0;
        FileInputStream fis = null;
        FileOutputStream fos = null;
        try {
            MessageDigest md = MessageDigest.getInstance(algorithm);
            fis = new FileInputStream(filename);
            while (fis.available() > 0) {
                read =  fis.read(b);
                md.update(b, 0, read);
                count += read;
            }
            byte[] digest = md.digest();
            StringBuffer fileNameBuffer =
                new StringBuffer(128)
                        .append(filename)
                        .append(".")
                        .append(algorithm);
            fos = new FileOutputStream(fileNameBuffer.toString());
            OutputStream encodedStream = MimeUtility.encode(fos, "base64");
            encodedStream.write(digest);
            fos.flush();
        } catch (Exception e) {
            System.out.println("Error computing Digest: " + e);
        } finally {
            try {
                fis.close();
                fos.close();
            } catch (Exception ignored) {}
        }
    }
                            
    public static String digestString(String pass, String algorithm )
            throws NoSuchAlgorithmException  {
        MessageDigest md;
        ByteArrayOutputStream bos;
        try {
            md = MessageDigest.getInstance(algorithm);
            byte[] digest = md.digest(pass.getBytes("iso-8859-1"));
            bos = new ByteArrayOutputStream();
            OutputStream encodedStream = MimeUtility.encode(bos, "base64");
            encodedStream.write(digest);
            return bos.toString("iso-8859-1");
        } catch (IOException ioe) {
            throw new RuntimeException("Fatal error: " + ioe);
        } catch (MessagingException me) {
            throw new RuntimeException("Fatal error: " + me);
        }
    }
    private DigestUtil() {
                            
    }
}

   仿照源码加入相应的jar包即可对密码进行加密解密。