tree 589fa304ec152558fc189f2da773154bd334e64c
parent 50d2b643ea6675927435743633a57c2a9cfd8d83
author Herbert Xu <herbert@gondor.apana.org.au> 1467199941 +0800
committer Herbert Xu <herbert@gondor.apana.org.au> 1467387918 +0800

crypto: rsa - Generate fixed-length output

Every implementation of RSA that we have naturally generates
output with leading zeroes.  The one and only user of RSA,
pkcs1pad wants to have those leading zeroes in place, in fact
because they are currently absent it has to write those zeroes
itself.

So we shouldn't be stripping leading zeroes in the first place.
In fact this patch makes rsa-generic produce output with fixed
length so that pkcs1pad does not need to do any extra work.

This patch also changes DH to use the new interface.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>