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by notacoward
4225 days ago
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Actually ARM does make crypto. It's part of ARMv8, licensable as an option for at least the Cortex-A53. http://infocenter.arm.com/help/topic/com.arm.doc.ddi0500e/DD... (section 2.1.4) There are undoubtedly other bits as well, as part of their "trusted computing" blahblah. Even if that weren't the case, knowing more about the internals of current and upcoming ARM IP could help optimize even an all-software implementation of PolarSSL. You could be right that it's mostly about "one stop shopping" but that doesn't mean there won't be other benefits. |
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However, Trusted Computing crypto is different than the crypto accelerators you find as peripherals in an SoC.
I should have been more clear that I meant crypto peripherals. There are crypto instruction extensions but don't require a separate library implementation -- just asm code optimization in something like openSSL.
PolarSSL is also targeted (mainly) towards much lower power than A53 or Cortex-A. It is targeted towards Cortex-M where you are dealing with KB of data and often don't have an MMU. You can't just port OpenSSL to those platforms and run it at will, hence their optimized libraries.