X-Git-Url: http://wagner.pp.ru/gitweb/?a=blobdiff_plain;f=gost_grasshopper_cipher.h;h=350075ee92e3a3614440b631501f1aefb411110d;hb=refs%2Fheads%2Fmgm_impl;hp=2486e61d47e862fbbbd48f69a511ef1bb5108486;hpb=1e15537d7583cdd5a4b003b5efb92f0b6e1fdcc6;p=openssl-gost%2Fengine.git

diff --git a/gost_grasshopper_cipher.h b/gost_grasshopper_cipher.h
index 2486e61..350075e 100644
--- a/gost_grasshopper_cipher.h
+++ b/gost_grasshopper_cipher.h
@@ -18,6 +18,7 @@ extern "C" {
 // 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;
@@ -31,10 +32,29 @@ typedef struct {
 
 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);
 
@@ -57,6 +77,10 @@ int gost_grasshopper_cipher_init_cfb(EVP_CIPHER_CTX* ctx, const unsigned char* k
 
 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);
 
@@ -77,6 +101,10 @@ int gost_grasshopper_cipher_do_cfb(EVP_CIPHER_CTX* ctx, unsigned char* out,
 
 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);
 
@@ -88,7 +116,7 @@ int gost_grasshopper_cipher_ctl(EVP_CIPHER_CTX* ctx, int type, int arg, void* pt
 
 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);
 
@@ -97,6 +125,8 @@ extern const EVP_CIPHER* cipher_gost_grasshopper_cbc();
 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);