add full support to wolfcrypt tests for random.c cryptocbs

wolfcrypt/src/random.c

@@ -1770,6 +1770,26 @@ WC_RNG* wc_rng_new(byte* nonce, word32 nonceSz, void* heap)
 }
 
 
+int wc_rng_new_ex(WC_RNG **rng, byte* nonce, word32 nonceSz,
+                  void* heap, int devId)
+{
+    int ret;
+
+    *rng = (WC_RNG*)XMALLOC(sizeof(WC_RNG), heap, DYNAMIC_TYPE_RNG);
+    if (*rng == NULL) {
+        return MEMORY_E;
+    }
+
+    ret = _InitRng(*rng, nonce, nonceSz, heap, devId);
+    if (ret != 0) {
+        XFREE(*rng, heap, DYNAMIC_TYPE_RNG);
+        *rng = NULL;
+    }
+
+    return ret;
+}
+
+
 WOLFSSL_ABI
 void wc_rng_free(WC_RNG* rng)
 {
@@ -3777,6 +3797,28 @@ int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
 
 #elif defined(NO_DEV_RANDOM)
 
+    /* Allow bare-metal targets to use cryptoCb as seed provider */
+    #if defined(WOLF_CRYPTO_CB)
+
+    int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
+    {
+        int ret = WC_HW_E;
+
+        #ifndef WOLF_CRYPTO_CB_FIND
+        if (os->devId != INVALID_DEVID)
+        #endif
+        {
+            ret = wc_CryptoCb_RandomSeed(os, output, sz);
+            if (ret == CRYPTOCB_UNAVAILABLE) {
+                ret = WC_HW_E;
+            }
+        }
+
+        return ret;
+    }
+
+    #else /* defined(WOLF_CRYPTO_CB)*/
+
     #error "you need to write an os specific wc_GenerateSeed() here"
 
     /*
@@ -3786,6 +3828,8 @@ int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
     }
     */
 
+   #endif  /* !defined(WOLF_CRYPTO_CB) */
+
 #else
 
     /* may block */

wolfcrypt/test/test.c

@@ -15281,14 +15281,30 @@ static wc_test_ret_t random_rng_test(void)
 #if !defined(HAVE_FIPS) && !defined(HAVE_SELFTEST) && !defined(WOLFSSL_NO_MALLOC)
     {
         byte nonce[8] = { 0 };
-        /* Test dynamic RNG. */
+
+        /* Test dynamic RNG */
         rng = wc_rng_new(nonce, (word32)sizeof(nonce), HEAP_HINT);
         if (rng == NULL)
             return WC_TEST_RET_ENC_ERRNO;
 
         ret = _rng_test(rng, WC_TEST_RET_ENC_NC);
+        wc_rng_free(rng);
+        rng = NULL;
+
+        if (ret != 0)
+            return ret;
+
+        /* Test dynamic RNG using extended API */
+        ret = wc_rng_new_ex(&rng, nonce, (word32)sizeof(nonce),
+                            HEAP_HINT, devId);
+        if (ret != 0)
+            return WC_TEST_RET_ENC_EC(ret);
 
+        ret = _rng_test(rng, WC_TEST_RET_ENC_NC);
         wc_rng_free(rng);
+
+        if (ret != 0)
+            return ret;
     }
 #endif
 

wolfssl/wolfcrypt/random.h

@@ -205,7 +205,10 @@ WOLFSSL_API int wc_GenerateSeed(OS_Seed* os, byte* seed, word32 sz);
 #endif /* HAVE_WNR */
 
 
-WOLFSSL_ABI WOLFSSL_API WC_RNG* wc_rng_new(byte* nonce, word32 nonceSz, void* heap);
+WOLFSSL_ABI WOLFSSL_API WC_RNG* wc_rng_new(byte* nonce, word32 nonceSz,
+                                           void* heap);
+WOLFSSL_API int wc_rng_new_ex(WC_RNG **rng, byte* nonce, word32 nonceSz,
+                              void* heap, int devId);
 WOLFSSL_ABI WOLFSSL_API void wc_rng_free(WC_RNG* rng);