Is there a Java CRC/checksum command?

Hobbes

I want to create a checksum on a file. Just wondering if there is a command in Java to do this or do I have to write my own?

I see there is a command in java.util.zip (CheckedInputStream using Adler32) but I can't seem to get it to work properly

Even tried this example. As usual I must be doing something wrong.

satchmo

Have you tried java.util.zip.CRC32?
Will that example just not run, or does it give incorrect checksums, or what's the problem?

spod

javax.crypto is also well worth checking out.

has md5 etc. hashing.

haven't used it in a year, but cryptix used to have a good export friendly implementation of alot of the library.

Licensing might be slightly more non us friendly for the official sun product now.

spd

Hobbes

Thanks Spod. Eventually found that (well java.security.* actually) and I'm using the digestinputstream to create the checksum.

Appears to be working quite well.



[This message has been edited by Hobbes (edited 29-05-2001).]