Bob Mearns wrote:
...
DSA, with its 320-bit sigs, is out for this application. I've played
with RSA a bit, but I run into problems with the digest being too
long when using RSA keys shorter than 384 bits. I thought I'd read
that the RSA signature should be the same length as the number of bits
in the key, and I don't understand how digest length (at 128 or 160 bits
far shorter than the key) plays into this.
you need to add the bytes for the pkcs1 padding + the bytes for
the digestInfo structure
Cheers,
Nils
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