On 02.02.2021 09:48, Van Leeuwen, Pascal wrote:
Hello Maciej,
Hello,
-----Original Message-----
From: Maciej Pijanowski <maciej.pijanow...@3mdeb.com>
Sent: Monday, February 1, 2021 7:53 PM
To: linux-crypto@vger.kernel.org
Cc: antoine.ten...@bootlin.com; pascalv...@gmail.com; Piotr Król
<piotr.k...@3mdeb.com>
Subject: safexcel driver for EIP197 and mini firmware features
<<< External Email >>>
Hello,
I am interested in using the EIP197 crypto accelerator. I am aware that
it requires an NDA
to obtain the firmware for it, but I found out that there is some kind
of "minifw" as well
in the linux-firmware tree [3]. I found no description of it - I would
like to learn what
are the features and limitations of this "minifw".
Actually, from the perspective of what that firmware normally does, it does not
have any features
at all :-) Ok, except for cache invalidates, which the EIP-197 requires.
It just bypasses everything from the inputs to the internal crypto engine,
effectively turning the
EIP-197 into an EIP-97 with caches & prefetching.
But that's OK for the Linux kernel driver, because that was using the EIP-197
in EIP-97 backward
compatibility mode anyway. It does not support any advanced EIP-197 firmware
features.
So from the perspective of the current Linux driver: no limitations.
Thank you very much for the response. That is much more clear now.
I started with using it on the Debian image from board vendor [2]. The
kernel here is
5.1.0. The firmware is loaded, but the ALG tests are all failing:
[14785.750246] crypto-safexcel f2800000.crypto: firmware: direct-loading
firmware inside-secure/eip197b/ifpp.bin
[14785.762765] crypto-safexcel f2800000.crypto: firmware: direct-loading
firmware inside-secure/eip197b/ipue.bin
[14785.777978] alg: skcipher: safexcel-cbc-des encryption test failed
(wrong output IV) on test vector 0, cfg="in-place"
[14785.788661] 00000000: fe dc ba 98 76 54 32 10
[14785.800606] alg: skcipher: safexcel-cbc-des3_ede encryption test
failed (wrong output IV) on test vector 0, cfg="in-place"
[14785.811720] 00000000: 7d 33 88 93 0f 93 b2 42
[14785.823734] alg: skcipher: safexcel-cbc-aes encryption test failed
(wrong output IV) on test vector 0, cfg="in-place"
[14785.834439] 00000000: 3d af ba 42 9d 9e b4 30 b4 22 da 80 2c 9f ac 41
[14785.884568] alg: hash: safexcel-hmac-sha224 test failed (wrong
result) on test vector 3, cfg="init+update+update+final two even splits"
[14785.901836] alg: hash: safexcel-hmac-sha256 test failed (wrong
result) on test vector 2, cfg="import/export"
[14785.926693] alg: aead: safexcel-authenc-hmac-sha1-cbc-aes encryption
test failed (wrong result) on test vector 0, cfg="misaligned splits
crossing pages, inplace"
[14785.944430] alg: No test for authenc(hmac(sha224),cbc(aes))
(safexcel-authenc-hmac-sha224-cbc-aes)
[14785.956978] alg: aead: safexcel-authenc-hmac-sha256-cbc-aes
encryption test failed (wrong result) on test vector 0, cfg="two even
aligned splits"
[14785.973472] alg: No test for authenc(hmac(sha384),cbc(aes))
(safexcel-authenc-hmac-sha384-cbc-aes)
[14785.986103] alg: aead: safexcel-authenc-hmac-sha512-cbc-aes
encryption test failed (wrong result) on test vector 0, cfg="two even
aligned splits"
Ok, that is unexpected. Although I know there is one particular kernel version
that was broken.
So you might want to try a slightly newer one.
(I'd love to try 5.1 myself but I don't have access to the hardware right now,
working from home)
I am going to try with 5.10.12 and let you know with the results.
I am going to test it with more recent, mainline kernel as well, but it
would be still nice to learn
a little bit more about this "minifw", it's features, and what could be
possibly achieved on this
board without proprietary (and behind NDA) crypto firmware.
Everything the kernel driver currently supports.
The real firmware is for doing full protocol offload (like IPsec, DTLS, etc.)
which the Linux kernel
does not currently support anyway. (unfortunately, I might add)
Are you aware of any other system (OS) or implementation which takes
advantage of more of the EIP197 features (like the mentioned IPsec offload)?
Thank you,
[1]
https://www.solid-run.com/embedded-networking/marvell-armada-family/clearfog-gt-8k/
[2] https://images.solid-build.xyz/8040/Debian/
[3]
https://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git/commit/inside-
secure/eip197_minifw/ifpp.bin?id=eefb5f7410150c00d0ab5c41c5d817ae9bf449b3
--
Maciej Pijanowski
Embedded Systems Engineer
GPG: 9963C36AAC3B2B46
https://3mdeb.com | @3mdeb_com
Regards,
Pascal van Leeuwen
Silicon IP Architect Multi-Protocol Engines, Rambus Security
Rambus ROTW Holding BV
+31-73 6581953
Note: The Inside Secure/Verimatrix Silicon IP team was recently acquired by
Rambus.
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--
Maciej Pijanowski
Embedded Systems Engineer
GPG: 9963C36AAC3B2B46
https://3mdeb.com | @3mdeb_com
