commit 4fc21fdeb6ecff1165b1a7e77cea5676b8058ee0
author Gilles Peskine <Gilles.Peskine@arm.com> Fri Nov 13 18:47:18 2020 +0100
committer Gilles Peskine <Gilles.Peskine@arm.com> Mon Nov 23 17:42:54 2020 +0100
tree 7fdbc1bf06f08e805f0b6602869828bef922432b
parent 1c49f1ac4606963f1b6ac00a18dbe870e0222fa0

Implement MBEDTLS_PSA_CRYPTO_EXTERNAL_RNG

Implement support for MBEDTLS_PSA_CRYPTO_EXTERNAL_RNG.

For test purposes, write an implementation that uses libc rand().

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 91aaf80..9497279 100644
--- a/include/mbedtls/check_config.h
+++ b/include/mbedtls/check_config.h
@@ -605,6 +605,11 @@
 #error "MBEDTLS_PSA_INJECT_ENTROPY is not compatible with actual entropy sources"
 #endif
 
+#if defined(MBEDTLS_PSA_INJECT_ENTROPY) &&              \
+    !defined(MBEDTLS_PSA_CRYPTO_EXTERNAL_RNG)
+#error "MBEDTLS_PSA_INJECT_ENTROPY is not compatible with MBEDTLS_PSA_CRYPTO_EXTERNAL_RNG"
+#endif
+
 #if defined(MBEDTLS_PSA_ITS_FILE_C) && \
     !defined(MBEDTLS_FS_IO)
 #error "MBEDTLS_PSA_ITS_FILE_C defined, but not all prerequisites"