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CR50: set result size in _cpri__GenerateKeyEcc, _cpri__GetEphemeralEcc

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_cpri__GenerateKeyEcc, and _cpri__GetEphemeralEcc are expected to
set the size of the result in accordance with the curve being used.

BRANCH=none
BUG=chrome-os-partner:43025,chrome-os-partner:47524
TEST=tests in test/tpm/tpmtest.py, test CPCTPM_TC2_2_14_02_05 passes

Change-Id: I558cc56f689c2d33c12876ddbfde7e9659613d2c
Signed-off-by: nagendra modadugu <ngm@google.com>
Reviewed-on: https://chromium-review.googlesource.com/331210
Commit-Ready: Nagendra Modadugu <ngm@google.com>
Tested-by: Nagendra Modadugu <ngm@google.com>
Reviewed-by: Vadim Bendebury <vbendeb@chromium.org>
This commit is contained in:
nagendra modadugu
2016-03-07 10:09:42 -08:00
committed by chrome-bot
parent 86d94fa3b5
commit 6e0309ffa9
1 changed files with 11 additions and 3 deletions
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14
board/cr50/tpm2/ecc.c
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@@ -114,8 +114,12 @@ CRYPT_RESULT _cpri__GenerateKeyEcc(
if (DCRYPTO_p256_key_from_bytes(
(p256_int *) q->x.b.buffer,
(p256_int *) q->y.b.buffer,
(p256_int *) d->b.buffer, key_bytes))
(p256_int *) d->b.buffer, key_bytes)) {
q->x.b.size = sizeof(p256_int);
q->y.b.size = sizeof(p256_int);
d->b.size = sizeof(p256_int);
break;
}
}
if (count == 0)
@@ -203,10 +207,14 @@ CRYPT_RESULT _cpri__GetEphemeralEcc(TPMS_ECC_POINT *q, TPM2B_ECC_PARAMETER *d,
if (DCRYPTO_p256_key_from_bytes((p256_int *) q->x.b.buffer,
(p256_int *) q->y.b.buffer,
(p256_int *) d->b.buffer,
key_bytes))
key_bytes)) {
q->x.b.size = sizeof(p256_int);
q->y.b.size = sizeof(p256_int);
d->b.size = sizeof(p256_int);
return CRYPT_SUCCESS;
else
} else {
return CRYPT_FAIL;
}
}
#ifdef CRYPTO_TEST_SETUP