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>
diff --git a/tests/src/psa_crypto_helpers.c b/tests/src/psa_crypto_helpers.c
index 40877c7..dacda68 100644
--- a/tests/src/psa_crypto_helpers.c
+++ b/tests/src/psa_crypto_helpers.c
@@ -27,4 +27,20 @@
#include <psa/crypto.h>
+#if defined(MBEDTLS_PSA_CRYPTO_EXTERNAL_RNG)
+#include <test/random.h>
+
+psa_status_t mbedtls_psa_external_get_random(
+ mbedtls_psa_external_random_context_t *context,
+ uint8_t *output, size_t output_size, size_t *output_length )
+{
+ /* This implementation is for test purposes only!
+ * Use the libc non-cryptographic random generator. */
+ (void) context;
+ mbedtls_test_rnd_std_rand( NULL, output, output_size );
+ *output_length = output_size;
+ return( PSA_SUCCESS );
+}
+#endif /* MBEDTLS_PSA_CRYPTO_EXTERNAL_RNG */
+
#endif /* MBEDTLS_PSA_CRYPTO_C */