psasim: add AUT for psa_generate_random()

Signed-off-by: Valerio Setti <valerio.setti@nordicsemi.no>
diff --git a/tests/psa-client-server/psasim/src/aut_main.c b/tests/psa-client-server/psasim/src/aut_main.c
index e1012a5..c4940c3 100644
--- a/tests/psa-client-server/psasim/src/aut_main.c
+++ b/tests/psa-client-server/psasim/src/aut_main.c
@@ -22,6 +22,7 @@
 int psa_hash_compute_main(void);
 int psa_hash_main(void);
 int psa_aead_main(char *cipher_name);
+int psa_random_main(void);
 
 #define TEST_MODULE(main_func) \
     do {    \
@@ -48,6 +49,8 @@
     TEST_MODULE(psa_aead_main("aes128-gcm_8"));
     TEST_MODULE(psa_aead_main("chachapoly"));
 
+    TEST_MODULE(psa_random_main());
+
 exit:
     return (ret != 0) ? 1 : 0;
 }
diff --git a/tests/psa-client-server/psasim/src/aut_psa_random.c b/tests/psa-client-server/psasim/src/aut_psa_random.c
new file mode 100644
index 0000000..5880c4d
--- /dev/null
+++ b/tests/psa-client-server/psasim/src/aut_psa_random.c
@@ -0,0 +1,47 @@
+/*
+ *  Copyright The Mbed TLS Contributors
+ *  SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
+ */
+
+#include "mbedtls/build_info.h"
+
+#include <psa/crypto.h>
+#include <string.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "mbedtls/entropy.h"
+
+#define BUFFER_SIZE 100
+
+int psa_random_main(void)
+{
+    psa_status_t status;
+    uint8_t output[BUFFER_SIZE] = { 0 };
+
+    status = psa_crypto_init();
+    if (status != PSA_SUCCESS) {
+        printf("psa_crypto_init failed\n");
+        return EXIT_FAILURE;
+    }
+
+    status = psa_generate_random(output, BUFFER_SIZE);
+    if (status != PSA_SUCCESS) {
+        printf("psa_generate_random failed\n");
+        return EXIT_FAILURE;
+    }
+
+    printf("Random bytes generated:\n");
+
+    for (size_t j = 0; j < BUFFER_SIZE; j++) {
+        if (j % 8 == 0) {
+            printf("\n    ");
+        }
+        printf("%02x ", output[j]);
+    }
+
+    printf("\n");
+
+    mbedtls_psa_crypto_free();
+    return 0;
+}