/* $OpenBSD: gost.h,v 1.4 2022/07/12 14:42:49 kn Exp $ */
/*
 * Copyright (c) 2014 Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
 * Copyright (c) 2005-2006 Cryptocom LTD
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. All advertising materials mentioning features or use of this
 *    software must display the following acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
 *
 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
 *    endorse or promote products derived from this software without
 *    prior written permission. For written permission, please contact
 *    openssl-core@openssl.org.
 *
 * 5. Products derived from this software may not be called "OpenSSL"
 *    nor may "OpenSSL" appear in their names without prior written
 *    permission of the OpenSSL Project.
 *
 * 6. Redistributions of any form whatsoever must retain the following
 *    acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
 *
 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 * ====================================================================
 */

#ifndef HEADER_GOST_H
#define HEADER_GOST_H

#include <openssl/opensslconf.h>

#ifdef OPENSSL_NO_GOST
#error GOST is disabled.
#endif

#include <openssl/asn1t.h>
#include <openssl/ec.h>

#ifdef __cplusplus
extern "C" {
#endif

typedef struct gost2814789_key_st {
        unsigned int key[8];
        unsigned int k87[256],k65[256],k43[256],k21[256];
        unsigned int count;
        unsigned key_meshing : 1;
} GOST2814789_KEY;

int Gost2814789_set_sbox(GOST2814789_KEY *key, int nid);
int Gost2814789_set_key(GOST2814789_KEY *key,
                const unsigned char *userKey, const int bits);
void Gost2814789_ecb_encrypt(const unsigned char *in, unsigned char *out,
        GOST2814789_KEY *key, const int enc);
void Gost2814789_cfb64_encrypt(const unsigned char *in, unsigned char *out,
        size_t length, GOST2814789_KEY *key,
        unsigned char *ivec, int *num, const int enc);
void Gost2814789_cnt_encrypt(const unsigned char *in, unsigned char *out,
        size_t length, GOST2814789_KEY *key,
        unsigned char *ivec, unsigned char *cnt_buf, int *num);

typedef struct {
        ASN1_OCTET_STRING *iv;
        ASN1_OBJECT *enc_param_set;
} GOST_CIPHER_PARAMS;

GOST_CIPHER_PARAMS *GOST_CIPHER_PARAMS_new(void);
void GOST_CIPHER_PARAMS_free(GOST_CIPHER_PARAMS *a);
GOST_CIPHER_PARAMS *d2i_GOST_CIPHER_PARAMS(GOST_CIPHER_PARAMS **a, const unsigned char **in, long len);
int i2d_GOST_CIPHER_PARAMS(GOST_CIPHER_PARAMS *a, unsigned char **out);
extern const ASN1_ITEM GOST_CIPHER_PARAMS_it;

#define GOST2814789IMIT_LENGTH 4
#define GOST2814789IMIT_CBLOCK 8
#define GOST2814789IMIT_LONG unsigned int

typedef struct GOST2814789IMITstate_st {
        GOST2814789IMIT_LONG    Nl, Nh;
        unsigned char           data[GOST2814789IMIT_CBLOCK];
        unsigned int            num;

        GOST2814789_KEY         cipher;
        unsigned char           mac[GOST2814789IMIT_CBLOCK];
} GOST2814789IMIT_CTX;

/* Note, also removed second parameter and removed dctx->cipher setting */
int GOST2814789IMIT_Init(GOST2814789IMIT_CTX *c, int nid);
int GOST2814789IMIT_Update(GOST2814789IMIT_CTX *c, const void *data, size_t len);
int GOST2814789IMIT_Final(unsigned char *md, GOST2814789IMIT_CTX *c);
void GOST2814789IMIT_Transform(GOST2814789IMIT_CTX *c, const unsigned char *data);
unsigned char *GOST2814789IMIT(const unsigned char *d, size_t n,
                unsigned char *md, int nid,
                const unsigned char *key, const unsigned char *iv);

#define GOSTR341194_LONG unsigned int

#define GOSTR341194_LENGTH      32
#define GOSTR341194_CBLOCK      32
#define GOSTR341194_LBLOCK      (GOSTR341194_CBLOCK/4)

typedef struct GOSTR341194state_st {
        GOSTR341194_LONG        Nl, Nh;
        GOSTR341194_LONG        data[GOSTR341194_LBLOCK];
        unsigned int            num;

        GOST2814789_KEY         cipher;
        unsigned char           H[GOSTR341194_CBLOCK];
        unsigned char           S[GOSTR341194_CBLOCK];
} GOSTR341194_CTX;

/* Note, also removed second parameter and removed dctx->cipher setting */
int GOSTR341194_Init(GOSTR341194_CTX *c, int nid);
int GOSTR341194_Update(GOSTR341194_CTX *c, const void *data, size_t len);
int GOSTR341194_Final(unsigned char *md, GOSTR341194_CTX *c);
void GOSTR341194_Transform(GOSTR341194_CTX *c, const unsigned char *data);
unsigned char *GOSTR341194(const unsigned char *d, size_t n,unsigned char *md, int nid);

#if defined(_LP64)
#define STREEBOG_LONG64 unsigned long
#define U64(C)     C##UL
#else
#define STREEBOG_LONG64 unsigned long long
#define U64(C)     C##ULL
#endif

#define STREEBOG_LBLOCK 8
#define STREEBOG_CBLOCK 64
#define STREEBOG256_LENGTH 32
#define STREEBOG512_LENGTH 64

typedef struct STREEBOGstate_st {
        STREEBOG_LONG64 data[STREEBOG_LBLOCK];
        unsigned int    num;
        unsigned int    md_len;
        STREEBOG_LONG64 h[STREEBOG_LBLOCK];
        STREEBOG_LONG64 N[STREEBOG_LBLOCK];
        STREEBOG_LONG64 Sigma[STREEBOG_LBLOCK];
} STREEBOG_CTX;

int STREEBOG256_Init(STREEBOG_CTX *c);
int STREEBOG256_Update(STREEBOG_CTX *c, const void *data, size_t len);
int STREEBOG256_Final(unsigned char *md, STREEBOG_CTX *c);
void STREEBOG256_Transform(STREEBOG_CTX *c, const unsigned char *data);
unsigned char *STREEBOG256(const unsigned char *d, size_t n,unsigned char *md);

int STREEBOG512_Init(STREEBOG_CTX *c);
int STREEBOG512_Update(STREEBOG_CTX *c, const void *data, size_t len);
int STREEBOG512_Final(unsigned char *md, STREEBOG_CTX *c);
void STREEBOG512_Transform(STREEBOG_CTX *c, const unsigned char *data);
unsigned char *STREEBOG512(const unsigned char *d, size_t n,unsigned char *md);

typedef struct gost_key_st GOST_KEY;
GOST_KEY *GOST_KEY_new(void);
void GOST_KEY_free(GOST_KEY * r);
int GOST_KEY_check_key(const GOST_KEY * eckey);
int GOST_KEY_set_public_key_affine_coordinates(GOST_KEY * key, BIGNUM * x, BIGNUM * y);
const EC_GROUP * GOST_KEY_get0_group(const GOST_KEY * key);
int GOST_KEY_set_group(GOST_KEY * key, const EC_GROUP * group);
int GOST_KEY_get_digest(const GOST_KEY * key);
int GOST_KEY_set_digest(GOST_KEY * key, int digest_nid);
const BIGNUM * GOST_KEY_get0_private_key(const GOST_KEY * key);
int GOST_KEY_set_private_key(GOST_KEY * key, const BIGNUM * priv_key);
const EC_POINT * GOST_KEY_get0_public_key(const GOST_KEY * key);
int GOST_KEY_set_public_key(GOST_KEY * key, const EC_POINT * pub_key);
size_t GOST_KEY_get_size(const GOST_KEY * r);

/* Gost-specific pmeth control-function parameters */
/* For GOST R34.10 parameters */
#define EVP_PKEY_CTRL_GOST_PARAMSET     (EVP_PKEY_ALG_CTRL+1)
#define EVP_PKEY_CTRL_GOST_SIG_FORMAT   (EVP_PKEY_ALG_CTRL+2)
#define EVP_PKEY_CTRL_GOST_SET_DIGEST   (EVP_PKEY_ALG_CTRL+3)
#define EVP_PKEY_CTRL_GOST_GET_DIGEST   (EVP_PKEY_ALG_CTRL+4)

#define GOST_SIG_FORMAT_SR_BE   0
#define GOST_SIG_FORMAT_RS_LE   1

void ERR_load_GOST_strings(void);

/* Error codes for the GOST functions. */

/* Function codes. */
#define GOST_F_DECODE_GOST01_ALGOR_PARAMS                104
#define GOST_F_ENCODE_GOST01_ALGOR_PARAMS                105
#define GOST_F_GOST2001_COMPUTE_PUBLIC                   106
#define GOST_F_GOST2001_DO_SIGN                          107
#define GOST_F_GOST2001_DO_VERIFY                        108
#define GOST_F_GOST2001_KEYGEN                           109
#define GOST_F_GOST89_GET_ASN1_PARAMETERS                102
#define GOST_F_GOST89_SET_ASN1_PARAMETERS                103
#define GOST_F_GOST_KEY_CHECK_KEY                        124
#define GOST_F_GOST_KEY_NEW                              125
#define GOST_F_GOST_KEY_SET_PUBLIC_KEY_AFFINE_COORDINATES 126
#define GOST_F_PARAM_COPY_GOST01                         110
#define GOST_F_PARAM_DECODE_GOST01                       111
#define GOST_F_PKEY_GOST01_CTRL                          116
#define GOST_F_PKEY_GOST01_DECRYPT                       112
#define GOST_F_PKEY_GOST01_DERIVE                        113
#define GOST_F_PKEY_GOST01_ENCRYPT                       114
#define GOST_F_PKEY_GOST01_PARAMGEN                      115
#define GOST_F_PKEY_GOST01_SIGN                          123
#define GOST_F_PKEY_GOST_MAC_CTRL                        100
#define GOST_F_PKEY_GOST_MAC_KEYGEN                      101
#define GOST_F_PRIV_DECODE_GOST01                        117
#define GOST_F_PUB_DECODE_GOST01                         118
#define GOST_F_PUB_ENCODE_GOST01                         119
#define GOST_F_PUB_PRINT_GOST01                          120
#define GOST_F_UNPACK_SIGNATURE_CP                       121
#define GOST_F_UNPACK_SIGNATURE_LE                       122

/* Reason codes. */
#define GOST_R_BAD_KEY_PARAMETERS_FORMAT                 104
#define GOST_R_BAD_PKEY_PARAMETERS_FORMAT                105
#define GOST_R_CANNOT_PACK_EPHEMERAL_KEY                 106
#define GOST_R_CTRL_CALL_FAILED                          107
#define GOST_R_ERROR_COMPUTING_SHARED_KEY                108
#define GOST_R_ERROR_PARSING_KEY_TRANSPORT_INFO          109
#define GOST_R_INCOMPATIBLE_ALGORITHMS                   110
#define GOST_R_INCOMPATIBLE_PEER_KEY                     111
#define GOST_R_INVALID_DIGEST_TYPE                       100
#define GOST_R_INVALID_IV_LENGTH                         103
#define GOST_R_INVALID_MAC_KEY_LENGTH                    101
#define GOST_R_KEY_IS_NOT_INITIALIZED                    112
#define GOST_R_KEY_PARAMETERS_MISSING                    113
#define GOST_R_MAC_KEY_NOT_SET                           102
#define GOST_R_NO_PARAMETERS_SET                         115
#define GOST_R_NO_PEER_KEY                               116
#define GOST_R_NO_PRIVATE_PART_OF_NON_EPHEMERAL_KEYPAIR  117
#define GOST_R_PUBLIC_KEY_UNDEFINED                      118
#define GOST_R_RANDOM_NUMBER_GENERATOR_FAILED            120
#define GOST_R_SIGNATURE_MISMATCH                        121
#define GOST_R_SIGNATURE_PARTS_GREATER_THAN_Q            122
#define GOST_R_UKM_NOT_SET                               123

#ifdef  __cplusplus
}
#endif
#endif