md5_hc_ctx_t
md5_hmac_ctx_init(md5_hc_ctx_t *md5_hmac_ctx, uint32_t *ipad, uint32_t *opad)
void md5_hmac_ctx_init(md5_hc_ctx_t *, uint32_t *, uint32_t *);
md5_hc_ctx_t md5_ctx;
md5_hc_ctx_t md5_hmac_ctx;