?
Solved

How to create a SHA1, base64 encoding password in java?

Posted on 2008-10-13
1
Medium Priority
?
4,780 Views
Last Modified: 2008-10-23
I am trying to create a password that is first converted to uppercase, then Unicode it in little-endian UTF16,
then SHA1 it, then base64 encode it.  I will be displaying the password as a string.

Currently, I am getting output that looks like I have done it correctly, but am still unable to connect via https and it returns an invalid username/password..  So, I wanted to ensure my password encryption was correct.  I know Java doesn't support base64 encoding in the standard API, but found a routine that is suppose to do the trick.  See the attached code and let me know if this is correct.




static final String baseTable = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
 
// encrypt password
            String sPassword = "AVI5580!";
            byte[] unicodeValue = sPassword.getBytes( "utf-16" );
            md = MessageDigest.getInstance( "SHA1" );
            md.update( unicodeValue );
            byte[] encodedPassword = md.digest();
            String encodedString = encode( encodedPassword );
 
 
// encode method
 public static String encode( byte[] bytes )
    {
        StringBuffer tmp = new StringBuffer();
        int i = 0;
        byte pos;
        for (i = 0; i < bytes.length - bytes.length % 3; i += 3) {
            pos = (byte) (bytes[i] >> 2 & 63);
            tmp.append( baseTable.charAt( pos ) );
            pos = (byte) (((bytes[i] & 3) << 4) + (bytes[i + 1] >> 4 & 15));
            tmp.append( baseTable.charAt( pos ) );
            pos = (byte) (((bytes[i + 1] & 15) << 2) + (bytes[i + 2] >> 6 & 3));
            tmp.append( baseTable.charAt( pos ) );
            pos = (byte) (bytes[i + 2] & 63);
            tmp.append( baseTable.charAt( pos ) );
            // Add a new line for each 76 chars.
            // 76*3/4 = 57
            if ((i + 2) % 56 == 0) {
                tmp.append( "\r\n" );
            }
        }
        if (bytes.length % 3 != 0) {
            if (bytes.length % 3 == 2) {
                pos = (byte) (bytes[i] >> 2 & 63);
                tmp.append( baseTable.charAt( pos ) );
                pos = (byte) (((bytes[i] & 3) << 4) + (bytes[i + 1] >> 4 & 15));
                tmp.append( baseTable.charAt( pos ) );
                pos = (byte) ((bytes[i + 1] & 15) << 2);
                tmp.append( baseTable.charAt( pos ) );
                tmp.append( "=" );
            } else if (bytes.length % 3 == 1) {
                pos = (byte) (bytes[i] >> 2 & 63);
                tmp.append( baseTable.charAt( pos ) );
                pos = (byte) ((bytes[i] & 3) << 4);
                tmp.append( baseTable.charAt( pos ) );
                tmp.append( "==" );
            }
        }
        return tmp.toString();
    }

Open in new window

0
Comment
Question by:cindymccartney
1 Comment
 
LVL 23

Accepted Solution

by:
Ajay-Singh earned 2000 total points
ID: 22722684
You can use commons-codec library to encode it http://commons.apache.org/codec
0

Featured Post

What does it mean to be "Always On"?

Is your cloud always on? With an Always On cloud you won't have to worry about downtime for maintenance or software application code updates, ensuring that your bottom line isn't affected.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

INTRODUCTION Working with files is a moderately common task in Java.  For most projects hard coding the file names, using parameters in configuration files, or using command-line arguments is sufficient.   However, when your application has vi…
Introduction Java can be integrated with native programs using an interface called JNI(Java Native Interface). Native programs are programs which can directly run on the processor. JNI is simply a naming and calling convention so that the JVM (Java…
This tutorial covers a practical example of lazy loading technique and early loading technique in a Singleton Design Pattern.
This tutorial will introduce the viewer to VisualVM for the Java platform application. This video explains an example program and covers the Overview, Monitor, and Heap Dump tabs.
Suggested Courses
Course of the Month12 days, 20 hours left to enroll

580 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question