From 18399d8d53a07b3587913adb1e73c1f4c77112a7 Mon Sep 17 00:00:00 2001 From: Przemek Stekiel Date: Mon, 27 Jun 2022 13:34:50 +0200 Subject: [PATCH] Add comment to config_psa.h about enabling PSA_HKDF/PSA_HKDF_EXRACT/PSA_HKDF_EXPAND algs Signed-off-by: Przemek Stekiel --- include/mbedtls/config_psa.h | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/include/mbedtls/config_psa.h b/include/mbedtls/config_psa.h index b469d3c8d0..2a6672e17a 100644 --- a/include/mbedtls/config_psa.h +++ b/include/mbedtls/config_psa.h @@ -606,6 +606,10 @@ extern "C" { #define PSA_WANT_ALG_GCM 1 #endif /* MBEDTLS_GCM_C */ +/* Enable PSA HKDF algorithm if mbedtls HKDF is supported. + * PSA HKDF EXTRACT and PSA HKDF EXPAND have minimal cost when + * PSA HKDF is enabled, so enable both algorithms together + * with PSA HKDF. */ #if defined(MBEDTLS_HKDF_C) #define MBEDTLS_PSA_BUILTIN_ALG_HMAC 1 #define PSA_WANT_ALG_HMAC 1