Problems changing hash algo for clearsign

David Shaw dshaw at
Sun May 10 20:02:31 CEST 2009

On May 10, 2009, at 8:52 AM, Tyler Spivey wrote:

> Hash: SHA1
> Hello. I'm trying to make any message I clearsign
> have a hash of SHA256.

If the key you are trying to make a SHA256 signature with is the same  
one that you signed this message with, then you can't.  It's a 1024- 
bit DSA key, and that key can only use a 160 bit hash.  (You can force  
it to use SHA256, but you'll still end up using only 160 bits of the  
256 bit hash).


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