# MD5 Message Digest Key

James Mernin (jmernin@eurologic.com)
Fri, 16 Oct 1998 13:08:21 +0100

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I have a question about the MessageDigest class in java.security.

I cannot see a way of supplying a key to the digest method for my
MessageDigest object. I have some existing C code which has a function
called MD5Digest and it takes as input a "data stream" AND a "key". It uses
this key to produce an appropriate message digest.

I would like to create a similar message digest from Java, send it over the
network (using sockets) and use my existing C code to verify it in the
usual manner.

I have searched archive upon archive and web site after web site but to no
avail - it does not mention anywhere how to specify a key to the digest
method.

Can you shed any light on this subject ?

Best Regards,
James Mernin.

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