bcrypt: Return error when requesting BCRYPT_HASH_LENGTH for unsupported object.

dlls/bcrypt/bcrypt_main.c

@@ -404,6 +404,8 @@ static NTSTATUS generic_alg_property( enum alg_id id, const WCHAR *prop, UCHAR *
 
     if (!strcmpW( prop, BCRYPT_HASH_LENGTH ))
     {
+        if (!alg_props[id].hash_length)
+            return STATUS_NOT_SUPPORTED;
         *ret_size = sizeof(ULONG);
         if (size < sizeof(ULONG))
             return STATUS_BUFFER_TOO_SMALL;

dlls/bcrypt/tests/bcrypt.c

@@ -763,6 +763,10 @@ static void test_rng(void)
     ret = pBCryptGetProperty(alg, BCRYPT_OBJECT_LENGTH, (UCHAR *)&len, sizeof(len), &size, 0);
     ok(ret == STATUS_NOT_SUPPORTED, "got %08x\n", ret);
 
+    len = size = 0xdeadbeef;
+    ret = pBCryptGetProperty(alg, BCRYPT_HASH_LENGTH, (UCHAR *)&len, sizeof(len), &size, 0);
+    ok(ret == STATUS_NOT_SUPPORTED, "got %08x\n", ret);
+
     test_alg_name(alg, "RNG");
 
     memset(buf, 0, 16);