Gate entropy injection through a dedicated configuration option
Entropy injection has specific testing requirements. Therefore it
should depend on a specific option.
diff --git a/include/mbedtls/check_config.h b/include/mbedtls/check_config.h
index 607deb9..c1450db 100644
--- a/include/mbedtls/check_config.h
+++ b/include/mbedtls/check_config.h
@@ -530,6 +530,17 @@
#error "MBEDTLS_PSA_CRYPTO_STORAGE_C defined, but not all prerequisites"
#endif
+#if defined(MBEDTLS_PSA_INJECT_ENTROPY) && \
+ !( defined(MBEDTLS_PSA_CRYPTO_STORAGE_C) && \
+ defined(MBEDTLS_ENTROPY_NV_SEED) )
+#error "MBEDTLS_PSA_INJECT_ENTROPY defined, but not all prerequisites"
+#endif
+
+#if defined(MBEDTLS_PSA_INJECT_ENTROPY) && \
+ !defined(MBEDTLS_NO_DEFAULT_ENTROPY_SOURCES)
+#error "MBEDTLS_PSA_INJECT_ENTROPY is not compatible with actual entropy sources"
+#endif
+
#if defined(MBEDTLS_PSA_ITS_FILE_C) && \
!defined(MBEDTLS_FS_IO)
#error "MBEDTLS_PSA_ITS_FILE_C defined, but not all prerequisites"
diff --git a/include/mbedtls/config.h b/include/mbedtls/config.h
index a358a20..5621965 100644
--- a/include/mbedtls/config.h
+++ b/include/mbedtls/config.h
@@ -1252,6 +1252,19 @@
//#define MBEDTLS_PSA_CRYPTO_SPM
/**
+ * \def MBEDTLS_PSA_INJECT_ENTROPY
+ *
+ * Enable support for entropy injection at first boot. This feature is
+ * required on systems that do not have a built-in entropy source (TRNG).
+ * This feature is currently not supported on systems that have a built-in
+ * entropy source.
+ *
+ * Requires: MBEDTLS_PSA_CRYPTO_STORAGE_C, MBEDTLS_ENTROPY_NV_SEED
+ *
+ */
+//#define MBEDTLS_PSA_INJECT_ENTROPY
+
+/**
* \def MBEDTLS_RSA_NO_CRT
*
* Do not use the Chinese Remainder Theorem