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PSA: support HMAC_DRBG

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Support using HMAC_DRBG instead of CTR_DRBG in the PSA subsystem.

Use HMAC_DRBG if CTR_DRBG is available. Choose between SHA-256 and
SHA-512 based on availability.

Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
This commit is contained in:
Gilles Peskine 2020-11-13 21:31:17 +01:00
parent 4fc21fdeb6
commit 82e57d1611
6 changed files with 91 additions and 13 deletions
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1
include/mbedtls/config.h
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@ -3146,6 +3146,7 @@
* Module: library/psa_crypto.c
*
* Requires: either MBEDTLS_CTR_DRBG_C and MBEDTLS_ENTROPY_C,
* or MBEDTLS_HMAC_DRBG_C and MBEDTLS_ENTROPY_C,
* or MBEDTLS_PSA_CRYPTO_EXTERNAL_RNG.
*
*/