3 * This file is distributed under the same license as OpenSSL
6 #ifndef GOST_GRASSHOPPER_CIPHER_H
7 #define GOST_GRASSHOPPER_CIPHER_H
9 #define SN_kuznyechik_mgm "kuznyechik-mgm"
11 #if defined(__cplusplus)
15 #include "gost_grasshopper_defines.h"
18 #include <openssl/evp.h>
24 grasshopper_key_t master_key;
25 grasshopper_key_t key;
26 grasshopper_round_keys_t encrypt_round_keys;
27 grasshopper_round_keys_t decrypt_round_keys;
28 grasshopper_w128_t buffer;
29 } gost_grasshopper_cipher_ctx;
32 gost_grasshopper_cipher_ctx c;
33 grasshopper_w128_t partial_buffer;
34 unsigned int section_size; /* After how much bytes mesh the key,
35 if 0 never mesh and work like plain ctr. */
36 unsigned char kdf_seed[8];
37 unsigned char tag[16];
39 } gost_grasshopper_cipher_ctx_ctr;
41 static void gost_grasshopper_cipher_key(gost_grasshopper_cipher_ctx* c, const uint8_t* k);
43 static void gost_grasshopper_cipher_destroy(gost_grasshopper_cipher_ctx* c);
45 static int gost_grasshopper_cipher_init_ecb(EVP_CIPHER_CTX* ctx,
46 const unsigned char* key, const unsigned char* iv, int enc);
48 static int gost_grasshopper_cipher_init_cbc(EVP_CIPHER_CTX* ctx,
49 const unsigned char* key, const unsigned char* iv, int enc);
51 static int gost_grasshopper_cipher_init_ofb(EVP_CIPHER_CTX* ctx,
52 const unsigned char* key, const unsigned char* iv, int enc);
54 static int gost_grasshopper_cipher_init_cfb(EVP_CIPHER_CTX* ctx,
55 const unsigned char* key, const unsigned char* iv, int enc);
57 static int gost_grasshopper_cipher_init_ctr(EVP_CIPHER_CTX* ctx,
58 const unsigned char* key, const unsigned char* iv, int enc);
60 static int gost_grasshopper_cipher_init_ctracpkm(EVP_CIPHER_CTX* ctx,
61 const unsigned char* key, const unsigned char* iv, int enc);
63 static int gost_grasshopper_cipher_init_ctracpkm_omac(EVP_CIPHER_CTX* ctx,
64 const unsigned char* key, const unsigned char* iv, int enc);
66 static int gost_grasshopper_cipher_init_mgm(EVP_CIPHER_CTX* ctx,
67 const unsigned char* key, const unsigned char* iv, int enc);
69 static int gost_grasshopper_cipher_init(EVP_CIPHER_CTX* ctx, const unsigned char* key,
70 const unsigned char* iv, int enc);
72 static int gost_grasshopper_cipher_do(EVP_CIPHER_CTX* ctx, unsigned char* out,
73 const unsigned char* in, size_t inl);
75 static int gost_grasshopper_cipher_do_ecb(EVP_CIPHER_CTX* ctx, unsigned char* out,
76 const unsigned char* in, size_t inl);
78 static int gost_grasshopper_cipher_do_cbc(EVP_CIPHER_CTX* ctx, unsigned char* out,
79 const unsigned char* in, size_t inl);
81 static int gost_grasshopper_cipher_do_ofb(EVP_CIPHER_CTX* ctx, unsigned char* out,
82 const unsigned char* in, size_t inl);
84 static int gost_grasshopper_cipher_do_cfb(EVP_CIPHER_CTX* ctx, unsigned char* out,
85 const unsigned char* in, size_t inl);
87 static int gost_grasshopper_cipher_do_ctr(EVP_CIPHER_CTX* ctx, unsigned char* out,
88 const unsigned char* in, size_t inl);
90 static int gost_grasshopper_cipher_do_ctracpkm(EVP_CIPHER_CTX* ctx, unsigned char* out,
91 const unsigned char* in, size_t inl);
93 static int gost_grasshopper_cipher_do_ctracpkm_omac(EVP_CIPHER_CTX* ctx, unsigned char* out,
94 const unsigned char* in, size_t inl);
96 static int gost_grasshopper_cipher_do_mgm(EVP_CIPHER_CTX* ctx, unsigned char* out,
97 const unsigned char* in, size_t inl);
99 static int gost_grasshopper_cipher_cleanup(EVP_CIPHER_CTX* ctx);
101 static int gost_grasshopper_mgm_cleanup(EVP_CIPHER_CTX *c);
103 static int gost_grasshopper_set_asn1_parameters(EVP_CIPHER_CTX* ctx, ASN1_TYPE* params);
105 static int gost_grasshopper_get_asn1_parameters(EVP_CIPHER_CTX* ctx, ASN1_TYPE* params);
107 static int gost_grasshopper_cipher_ctl(EVP_CIPHER_CTX* ctx, int type, int arg, void* ptr);
109 static int gost_grasshopper_mgm_ctrl(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr);
111 const EVP_CIPHER* cipher_gost_grasshopper_ctracpkm();
113 #if defined(__cplusplus)