topic CAAM secure storage via user space in i.MX Processors

CAAM secure storage via user space

noammoshe — Thu, 29 Jun 2017 10:14:56 GMT

Hi,
I want to use the CAAM secure storage to save data (passwords, keys, ...). I did some reading and I saw in:

  iMX6 (CAAM, TrustZone) Hardware Security Blocks Use.
  Non Volatile Memory in CAAM (iMX6)
  CAAM operation failure with secure memory

that the secure storage access is only via kernel space. How do I get to the secure storage from user space and preform something simple as saving data?

Thanks in advance.

Re: CAAM secure storage via user space

Yuri — Fri, 30 Jun 2017 05:51:10 GMT

Hello,

You may try using the CAAM secure storage in user space with the same descriptors as kernel does.

Have a great day,
Yuri

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Re: CAAM secure storage via user space

noammoshe — Sun, 02 Jul 2017 04:22:54 GMT

Can you supply an example? the only examples (or theory) I found was using the CAAM in user space via AF_ALG or cryptodev (ioctl) but in both there isn't an option to access the secure storage.

Re: CAAM secure storage via user space

Yuri — Mon, 03 Jul 2017 04:28:29 GMT

Hello,

sorry - no examples.

Regards,

Yuri.

Re: CAAM secure storage via user space

noammoshe — Mon, 03 Jul 2017 04:33:38 GMT

Can you at least point out to the API?