} gost_grasshopper_cipher_ctx_ofb;
typedef struct {
gost_grasshopper_cipher_ctx c;
grasshopper_w128_t iv_buffer;
grasshopper_w128_t partial_buffer;
} gost_grasshopper_cipher_ctx_ofb;
typedef struct {
gost_grasshopper_cipher_ctx c;
grasshopper_w128_t iv_buffer;
grasshopper_w128_t partial_buffer;