+/* from gost_crypt.c */
+/* Decrements 8-byte sequence */
+int decrement_sequence(unsigned char *seq, int decrement);
+
+/* Struct describing cipher and used for init/deinit.*/
+struct gost_cipher_st {
+ struct gost_cipher_st *template; /* template struct */
+ int nid;
+ EVP_CIPHER *cipher;
+ int block_size; /* (bytes) */
+ int key_len; /* (bytes) */
+ int iv_len;
+ int flags;
+ int (*init) (EVP_CIPHER_CTX *ctx, const unsigned char *key,
+ const unsigned char *iv, int enc);
+ int (*do_cipher)(EVP_CIPHER_CTX *ctx, unsigned char *out,
+ const unsigned char *in, size_t inl);
+ int (*cleanup)(EVP_CIPHER_CTX *);
+ int ctx_size;
+ int (*set_asn1_parameters)(EVP_CIPHER_CTX *, ASN1_TYPE *);
+ int (*get_asn1_parameters)(EVP_CIPHER_CTX *, ASN1_TYPE *);
+ int (*ctrl)(EVP_CIPHER_CTX *, int type, int arg, void *ptr);
+};
+typedef struct gost_cipher_st GOST_cipher;
+
+EVP_CIPHER *GOST_init_cipher(GOST_cipher *c);
+void GOST_deinit_cipher(GOST_cipher *c);
+
+extern GOST_cipher Gost28147_89_cipher;
+extern GOST_cipher Gost28147_89_cbc_cipher;
+extern GOST_cipher Gost28147_89_cnt_cipher;
+extern GOST_cipher Gost28147_89_cnt_12_cipher;
+extern GOST_cipher magma_ctr_cipher;
+extern GOST_cipher magma_ctr_acpkm_cipher;
+extern GOST_cipher magma_ctr_acpkm_omac_cipher;
+extern GOST_cipher magma_cbc_cipher;
+extern GOST_cipher magma_mgm_cipher;
+extern GOST_cipher grasshopper_ecb_cipher;
+extern GOST_cipher grasshopper_cbc_cipher;
+extern GOST_cipher grasshopper_cfb_cipher;
+extern GOST_cipher grasshopper_ofb_cipher;
+extern GOST_cipher grasshopper_ctr_cipher;
+extern GOST_cipher grasshopper_mgm_cipher;
+extern GOST_cipher grasshopper_ctr_acpkm_cipher;
+extern GOST_cipher grasshopper_ctr_acpkm_omac_cipher;
+extern GOST_cipher magma_kexp15_cipher;
+extern GOST_cipher kuznyechik_kexp15_cipher;
+
+struct gost_digest_st {
+ struct gost_digest_st *template;
+ int nid;
+ const char *alias;
+ EVP_MD *digest;
+ int result_size;
+ int input_blocksize;
+ int app_datasize;
+ int flags;
+ int (*init)(EVP_MD_CTX *ctx);
+ int (*update)(EVP_MD_CTX *ctx, const void *data, size_t count);
+ int (*final)(EVP_MD_CTX *ctx, unsigned char *md);
+ int (*copy)(EVP_MD_CTX *to, const EVP_MD_CTX *from);
+ int (*cleanup)(EVP_MD_CTX *ctx);
+ int (*ctrl)(EVP_MD_CTX *ctx, int cmd, int p1, void *p2);
+};
+typedef struct gost_digest_st GOST_digest;
+
+EVP_MD *GOST_init_digest(GOST_digest *d);
+void GOST_deinit_digest(GOST_digest *d);