Add provision to create the entropy seedfile for selftest sample
In the selftest sample application, if no seedfile is present, one will be
created so the test can execute.
diff --git a/programs/test/selftest.c b/programs/test/selftest.c
index 7698b62..16c469a 100644
--- a/programs/test/selftest.c
+++ b/programs/test/selftest.c
@@ -26,6 +26,7 @@
#endif
#include "mbedtls/entropy.h"
+#include "mbedtls/entropy_poll.h"
#include "mbedtls/hmac_drbg.h"
#include "mbedtls/ctr_drbg.h"
#include "mbedtls/dhm.h"
@@ -100,6 +101,40 @@
test_snprintf( 5, "123", 3 ) != 0 );
}
+/*
+ * Check if a seed file is present, and if not create one for the entropy
+ * self-test. If this fails, we attempt the test anyway, so no error is passed
+ * back.
+ */
+#if defined(MBEDTLS_ENTROPY_C) && defined(MBEDTLS_ENTROPY_NV_SEED) && \
+ !defined(MBEDTLS_NO_PLATFORM_ENTROPY)
+static void create_entropy_seed_file( void )
+{
+ int result;
+ size_t output_len = 0;
+ unsigned char seed_value[MBEDTLS_ENTROPY_BLOCK_SIZE];
+
+ /* Attempt to read the entropy seed file. If this fails - attempt to write
+ * to the file to ensure one is present. */
+ result = mbedtls_platform_std_nv_seed_read( seed_value,
+ MBEDTLS_ENTROPY_BLOCK_SIZE );
+ if( 0 == result )
+ return;
+
+ result = mbedtls_platform_entropy_poll( NULL,
+ seed_value,
+ MBEDTLS_ENTROPY_BLOCK_SIZE,
+ &output_len );
+ if( 0 != result )
+ return;
+
+ if( MBEDTLS_ENTROPY_BLOCK_SIZE != output_len )
+ return;
+
+ mbedtls_platform_std_nv_seed_write( seed_value, MBEDTLS_ENTROPY_BLOCK_SIZE );
+}
+#endif
+
int main( int argc, char *argv[] )
{
int v, suites_tested = 0, suites_failed = 0;
@@ -331,6 +366,11 @@
#endif
#if defined(MBEDTLS_ENTROPY_C)
+
+#if defined(MBEDTLS_ENTROPY_NV_SEED) && !defined(MBEDTLS_NO_PLATFORM_ENTROPY)
+ create_entropy_seed_file();
+#endif
+
if( mbedtls_entropy_self_test( v ) != 0 )
{
suites_failed++;
