- HMAC_Init_ex(digest->hmac_ctx, key, len, digest->digest, NULL);
-#else
- digest->hmac_ctx = xzalloc(sizeof(*digest->hmac_ctx));
- HMAC_Init(digest->hmac_ctx, key, len, digest->digest);
-#endif
+ HMAC_Init_ex(digest->hmac_ctx, key, (int)len, digest->digest, NULL);