typedef struct {
gost_grasshopper_cipher_ctx c;
grasshopper_w128_t partial_buffer;
unsigned int section_size; /* After how much bytes mesh the key,
if 0 never mesh and work like plain ctr. */
typedef struct {
gost_grasshopper_cipher_ctx c;
grasshopper_w128_t partial_buffer;
unsigned int section_size; /* After how much bytes mesh the key,
if 0 never mesh and work like plain ctr. */