In the interest of minimizing timing attacks on my OpenVPN and similar connections, does Raspberry Pi 4 support AES-NI instructions?
Some reference to AES is made in the technical reference manual, but I don't see a conclusive answer anywhere.
asked Dec 21, 2019 at 12:42
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@Michael thanks for the answer. Any reason why you didn't post that as answer with links?– The Quantum PhysicistCommented Dec 22, 2019 at 20:32
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Duplicate of superuser.com/questions/1488643/…– Michael HarveyCommented Dec 22, 2019 at 22:07
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1 Answer
The Raspberry Pi 4 does not have cryptographic extensions, to be more precise it has, but to be enabled would require HW changes alongside paying a license to Broadcom/ARM.
Here's the link for a discussion on RPi's forum where a RPi foundation engineer explains the fuzz: https://www.raspberrypi.org/forums/viewtopic.php?f=63&t=207888
jamesh's answer is straight forward:
That is licence for the HW, so you buy it then add the requisite HW to the die, so no, it cannot be added later without redeisgning the HW, which would cost about $1M Plus the licence....
