[PATCH v4 6/6] rockchip: make_fit_atf: add signature handling

[Tom Rini <trini@konsulko.com>]

On Tue, Jun 30, 2020 at 02:46:51PM +0200, Heiko St?bner wrote:
> Hi Tom,
> 
> Am Dienstag, 30. Juni 2020, 14:36:40 CEST schrieb Tom Rini:
> > On Fri, Jun 19, 2020 at 12:45:50PM +0200, Heiko Stuebner wrote:
> > 
> > > From: Heiko Stuebner <heiko.stuebner@theobroma-systems.com>
> > > 
> > > If the newly added fit-generator key-options are found, append needed
> > > signature nodes to all generated image blocks, so that they can get
> > > signed when mkimage later compiles the .itb from the generated .its.
> > > 
> > > Signed-off-by: Heiko Stuebner <heiko.stuebner@theobroma-systems.com>
> > 
> > First, I want to echo what Simon said.  We need to move towards having
> > less ad-hoc scripts for these kind of final modifiers.
> 
> looking at Simon's binman series is on my todo list, so yes I do agree
> with you :-) .

OK, thanks.

> > > ---
> > >  arch/arm/mach-rockchip/make_fit_atf.py | 57 +++++++++++++++++++++++++-
> > >  1 file changed, 56 insertions(+), 1 deletion(-)
> > > 
> > > diff --git a/arch/arm/mach-rockchip/make_fit_atf.py b/arch/arm/mach-rockchip/make_fit_atf.py
> > > index d15c32b303..de7dc19d11 100755
> > > --- a/arch/arm/mach-rockchip/make_fit_atf.py
> > > +++ b/arch/arm/mach-rockchip/make_fit_atf.py
> > > @@ -14,6 +14,14 @@ import sys
> > >  import getopt
> > >  import logging
> > >  import struct
> > > +try:
> > > +	# in python3 Cryptodome succeeds Crypto
> > > +	import Cryptodome
> > > +	from Cryptodome.PublicKey import RSA
> > > +except:
> > > +	import Crypto
> > > +	from Crypto.PublicKey import RSA
> > 
> > Is it that older python3 would support "Cryto" not "Cryptodome"  or
> > python2?  If the latter, we should just drop it.  We do however need to
> > document, and should try and be user friendly about catching the
> > failure, that we now need the pycrypto module installed.  Thanks!
> 
> python3 only seems to have Cryptodome, while python2 only seems to
> have Crypto. And with for example Debian's default python is still being
> python2 for a bit longer, I wanted to support both, especially as it it
> works like a drop-in replacement.

I don't _think_ we worry about running on distros where we can't say
/usr/bin/env python3 at this point so I'd rather not add more python2
compatibility code.

-- 
Tom
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