UDT to MD5?

Has anyone tried to get the MD5 hash of an UDT? I'm getting and sending a type through sockets and need to check/send the hash of the message body, but right now I have no way of checking if the values I'm getting are right or are completely wrong since I've never used MD5.

I have the clsMD5 class found on freeVBCode, but actually I'm not fully sure of how to proceed...

Any help?

How does the UDT look like ?
can you post the code for the UDT ?

I must use different types of UDTs, but all of them look more of less the same way, for example:

vb Code:

Public Type tBody
    msgTop As msgHeader
    msgSpecificZoneA1 As Long
    msgSpecificZoneA2 As Long
End Type

And the header type is something like:

vb Code:

Public Type msgHeader
    msgType As Long
    msgDate As Long
    msgLength As Long
End Type

How does the clsMD5 want to receive the data?

If these UDTs only contain longs then you could put them into an array of longs.

For UDTs that are built differently you could use the copymemory api to put the contents of the udt into an array

Quote:

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Originally Posted by jeroen79

How does the clsMD5 want to receive the data?

If these UDTs only contain longs then you could put them into an array of longs.

For UDTs that are built differently you could use the copymemory api to put the contents of the udt into an array

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I already use copymemory for the socket protocol, so that's not problem. Looking a bit more at the class it seems it's just enough with making:

vb Code:

Dim md5Converter As New MD5
    
    md5Converter.MD5Init
    md5Converter.MD5Update UBound(btBuff), btBuff
    md5Converter.MD5Final
 
   md5Sum = md5Converter.getValues()

But again, I have no way of checking this against some real values... so I don't know if I'm making this in the right way heh.

It is the right way...

To double check, save the UDT in a file, then MD5 the file, and check if you get the same result.

What is btbuff?

Quote:

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Originally Posted by jeroen79

What is btbuff?

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He used CopyMemory API to copy the UDT data into a byte array, and btbuff is that array...