// because of buffers
typedef struct {
uint8_t type;
+ grasshopper_key_t master_key;
grasshopper_key_t key;
grasshopper_round_keys_t encrypt_round_keys;
grasshopper_round_keys_t decrypt_round_keys;
typedef struct {
gost_grasshopper_cipher_ctx c;
grasshopper_w128_t buffer1;
- uint32_t g;
- uint32_t go;
} gost_grasshopper_cipher_ctx_ofb;
typedef struct {
gost_grasshopper_cipher_ctx c;
- grasshopper_w128_t iv_buffer;
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. */
} gost_grasshopper_cipher_ctx_ctr;
+typedef enum {
+ mgm_associated_data = 0,
+ mgm_main_data,
+} mgm_state;
+
+typedef struct {
+ gost_grasshopper_cipher_ctx c;
+ grasshopper_w128_t partial_buffer;
+
+ mgm_state mgm_state; /* associated_data/plain text */
+ grasshopper_w128_t mgm_iv[16]; /* nonce */
+ grasshopper_w128_t mgm_partial_buffer; /* Rest of associated data */
+ size_t ad_length;
+ size_t taglen; /* MAC length*/
+ unsigned char tag[16]; /* MAC - intermediate state */
+ unsigned char final_tag[16]; /* MAC - final state*/
+} gost_grasshopper_cipher_ctx_mgm;
+
typedef int (* grasshopper_init_cipher_func)(EVP_CIPHER_CTX* ctx, const unsigned char* key, const unsigned char* iv,
int enc);
int gost_grasshopper_cipher_init_ctr(EVP_CIPHER_CTX* ctx, const unsigned char* key, const unsigned char* iv, int enc);
+int gost_grasshopper_cipher_init_ctracpkm(EVP_CIPHER_CTX* ctx, const unsigned char* key, const unsigned char* iv, int enc);
+
+int gost_grasshopper_cipher_init_mgm(EVP_CIPHER_CTX* ctx, const unsigned char* key, const unsigned char* iv, int enc);
+
int gost_grasshopper_cipher_init(EVP_CIPHER_CTX* ctx, const unsigned char* key,
const unsigned char* iv, int enc);
int gost_grasshopper_cipher_do_ctr(EVP_CIPHER_CTX* ctx, unsigned char* out,
const unsigned char* in, size_t inl);
+int gost_grasshopper_cipher_do_ctracpkm(EVP_CIPHER_CTX* ctx, unsigned char* out,
+ const unsigned char* in, size_t inl);
+int gost_grasshopper_cipher_do_mgm(EVP_CIPHER_CTX* ctx, unsigned char* out,
+ const unsigned char* in, size_t inl);
int gost_grasshopper_cipher_cleanup(EVP_CIPHER_CTX* ctx);
EVP_CIPHER* cipher_gost_grasshopper_create(int cipher_type, int block_size);
-const int cipher_gost_grasshopper_setup(EVP_CIPHER* cipher, uint8_t mode, int iv_size, bool padding);
+const int cipher_gost_grasshopper_setup(EVP_CIPHER* cipher, uint8_t mode, int iv_size, bool padding, int extra_flags);
const EVP_CIPHER* cipher_gost_grasshopper(uint8_t mode, uint8_t num);
extern const EVP_CIPHER* cipher_gost_grasshopper_ofb();
extern const EVP_CIPHER* cipher_gost_grasshopper_cfb();
extern const EVP_CIPHER* cipher_gost_grasshopper_ctr();
+extern const EVP_CIPHER* cipher_gost_grasshopper_ctracpkm();
+extern const EVP_CIPHER* cipher_gost_grasshopper_mgm();
+
+void cipher_gost_grasshopper_destroy(void);
#if defined(__cplusplus)
}