Make the fallback behavior of mbedtls_test_rnd_buffer_rand optional
If a fallback is not explicitly configured in the
mbedtls_test_rnd_buf_info structure, fail after the buffer is
exhausted.
There is no intended behavior change in this commit: all existing uses
of mbedtls_test_rnd_buffer_rand() have been updated to set
mbedtls_test_rnd_std_rand as the fallback.
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
diff --git a/tests/suites/test_suite_ecdh.function b/tests/suites/test_suite_ecdh.function
index 3ab96fa..da0531b 100644
--- a/tests/suites/test_suite_ecdh.function
+++ b/tests/suites/test_suite_ecdh.function
@@ -240,6 +240,8 @@
rnd_info_A.buf = rnd_buf_A->x;
rnd_info_A.length = rnd_buf_A->len;
+ rnd_info_A.fallback_f_rng = mbedtls_test_rnd_std_rand;
+ rnd_info_A.fallback_p_rng = NULL;
/* Fix rnd_buf_A->x by shifting it left if necessary */
if( grp.nbits % 8 != 0 )
@@ -256,6 +258,8 @@
rnd_info_B.buf = rnd_buf_B->x;
rnd_info_B.length = rnd_buf_B->len;
+ rnd_info_B.fallback_f_rng = mbedtls_test_rnd_std_rand;
+ rnd_info_B.fallback_p_rng = NULL;
/* Fix rnd_buf_B->x by shifting it left if necessary */
if( grp.nbits % 8 != 0 )
@@ -362,9 +366,13 @@
mbedtls_ecdh_init( &srv );
mbedtls_ecdh_init( &cli );
+ rnd_info_A.fallback_f_rng = mbedtls_test_rnd_std_rand;
+ rnd_info_A.fallback_p_rng = NULL;
rnd_info_A.buf = dA->x;
rnd_info_A.length = dA->len;
+ rnd_info_B.fallback_f_rng = mbedtls_test_rnd_std_rand;
+ rnd_info_B.fallback_p_rng = NULL;
rnd_info_B.buf = dB->x;
rnd_info_B.length = dB->len;