fix hash hrbg memory leaks

ctaocrypt/src/pkcs7.c

@@ -1442,7 +1442,7 @@ int PKCS7_EncodeEnvelopedData(PKCS7* pkcs7, byte* output, word32 outputSz)
     XMEMCPY(output + idx, encryptedContent, desOutSz);
     idx += desOutSz;
 
-#ifdef NO_RC4
+#if defined(HAVE_HASHDRBG) || defined(NO_RC4)
     FreeRng(&rng);
 #endif
 

ctaocrypt/test/test.c

@@ -4704,6 +4704,10 @@ int ecc_test(void)
     ecc_free(&userB);
     ecc_free(&userA);
 
+#if defined(HAVE_HASHDRBG) || defined(NO_RC4)
+    FreeRng(&rng);
+#endif
+
     return 0;
 }
 
@@ -5267,6 +5271,10 @@ int pkcs7signed_test(void)
     free(out);
     PKCS7_Free(&msg);
 
+#if defined(HAVE_HASHDRBG) || defined(NO_RC4)
+    FreeRng(&rng);
+#endif
+
     if (ret > 0)
         return 0;