CAAM in trusty

asmaa — Fri, 14 May 2021 06:04:18 GMT

Hi there,

I am using CAAM in trusty for IMX boards, I am able to work out AES and DES in ECB mode, also RSA and SHA is working. I am not getting the right encrypted values for CBC mode. Following is the code changes for job descriptor , it's similar to what's done in trusty/hardware/nxp/app/hwcrypto/caam.c for ECB mode, I have changed slightly for CBC mode. I am not getting any error, just the encrypted output is not matching the ciphertext expected.

Can someone please confirm if I am doing it in the right way for AES CBC mode?

g_job->dsc[0] = 0xb080000A

g_job->dsc[1] = 0x02000010;

g_job->dsc[2] = key_pa;

g_job->dsc[3] = 0x22120010;

g_job->dsc[4] = iv_pa;

g_job->dsc[5] = 0x22120000 | (0x0000ffff & len);

g_job->dsc[6] = in_pa;

g_job->dsc[7] = enc ? 0x8210010D : 0x8210010C;

g_job->dsc[8] = 0x60300000 | (0x0000ffff & len);

g_job->dsc[9] = out_pa;

g_job->dsc_used = 10;

run_job(g_job);

if (g_job->status & JOB_RING_STS) {

TLOGE("job failed (0x%08x)\n", g_job->status);

return CAAM_FAILURE;

}

These are the values I am using:

KEY = 9dc2c84a37850c11699818605f47958c
IV = 256953b2feab2a04ae0180d8335bbed6
PLAINTEXT = 2e586692e647f5028ec6fa47a55a2aab
CIPHERTEXT = 1b1ebd1fc45ec43037fd4844241a437f

Any help is really appreciated, thank you so much.

Re: CAAM in trusty

asmaa — Thu, 20 May 2021 06:04:30 GMT

I was able to resolve the issue.

i.MX ProcessorsのトピックCAAM in trusty

CAAM in trusty

Re: CAAM in trusty