I've heard on this mailing list crazy things ranging from "You can't
compute MD5s in Java" to "Yes you can; so-and-so has a library you can
use."
The truth is, Java has built in support for MD5s and no extra toolkits or
libraries are necessary.
To demonstrate, here is a little snippet from one of my own Java
components (lava.io.IoToolbox) that uses Java's built-in MD5 support.
/**********************************************************************
Computes a message digest from a stream.
<p><b>Details:</b> <code>computeStreamDigest</code> computes a message digest for the
supplied input stream, closes the stream, and then returns the digest.</p>
<p>The digest name must be one of the standard digest names provided in the Java
Security API.</p>
@param is the input stream
@param algo the digest algorithm
@return the digest
@exception IOException if an I/O error occurs
@since 1999.10.21
**********************************************************************/
public static byte[] computeStreamDigest (InputStream is, String algo)
throws IOException, NoSuchAlgorithmException
{
try
{
MessageDigest md = MessageDigest.getInstance (algo);
if (! (is instanceof BufferedInputStream))
is = new BufferedInputStream (is);
byte[] buff = new byte [1024];
while (true)
{
int n = is . read (buff);
if (n < 0)
break;
md . update (buff, 0, n);
}
return md . digest ();
}
finally
{
// (lava.io.IoCloser, not a standard Java class)
IoCloser.close (is);
}
}
Hope this is helpful to whomever needs MD5s in Java.
-----
Charlton Rose
Software Consultant
Sharkysoft
web: http://sharkysoft.com/ (business)
web: http://charltonrose.com/ (personal)
im : AIM / homesharky
_______________________________________________
gnucash-devel mailing list
[EMAIL PROTECTED]
http://www.gnumatic.com/cgi-bin/mailman/listinfo/gnucash-devel
