commit f08b3f862408f03f78e30b524d0589446d9234a0
author Gilles Peskine <Gilles.Peskine@arm.com> Fri Nov 13 17:36:48 2020 +0100
committer Gilles Peskine <Gilles.Peskine@arm.com> Mon Nov 23 16:28:09 2020 +0100
tree b68a04a7d5472519cca9bde9653a7ac6366baffe
parent 30524eb7e5a34ef9839600f172e248d05696fcb5

Autonomous random driver: create configuration option

Create a configuration option for autonomous random drivers, i.e. PSA
crypto drivers that provide a random generator, that have their own
entropy source and do not support injecting entropy from another
source.

This commit only creates the configuration option. Subsequent commits
will add the implementation and tests.

Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>

include/mbedtls/check_config.h

diff --git a/include/mbedtls/check_config.h b/include/mbedtls/check_config.h
index 1ebb706..91aaf80 100644
--- a/include/mbedtls/check_config.h
+++ b/include/mbedtls/check_config.h
@@ -572,10 +572,11 @@
 #error "MBEDTLS_PLATFORM_NV_SEED_WRITE_MACRO and MBEDTLS_PLATFORM_STD_NV_SEED_WRITE cannot be defined simultaneously"
 #endif
 
-#if defined(MBEDTLS_PSA_CRYPTO_C) &&            \
-    !( defined(MBEDTLS_CTR_DRBG_C) &&           \
-       defined(MBEDTLS_ENTROPY_C) )
-#error "MBEDTLS_PSA_CRYPTO_C defined, but not all prerequisites"
+#if defined(MBEDTLS_PSA_CRYPTO_C) &&                                    \
+    !( ( defined(MBEDTLS_CTR_DRBG_C) &&                                 \
+         defined(MBEDTLS_ENTROPY_C) ) ||                                \
+       defined(MBEDTLS_PSA_CRYPTO_EXTERNAL_RNG) )
+#error "MBEDTLS_PSA_CRYPTO_C defined, but not all prerequisites (missing RNG)"
 #endif
 
 #if defined(MBEDTLS_PSA_CRYPTO_SPM) && !defined(MBEDTLS_PSA_CRYPTO_C)