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