gost_lcl.h 7.89 KB
Newer Older
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218
#ifndef GOST_TOOLS_H
#define GOST_TOOLS_H
/**********************************************************************
 *                        gost_lcl.h                                  *
 *             Copyright (c) 2006 Cryptocom LTD                       *
 *       This file is distributed under the same license as OpenSSL   *
 *                                                                    *
 *         Internal declarations  used in GOST engine                *
 *         OpenSSL 0.9.9 libraries required to compile and use        *
 *                              this code                             *
 **********************************************************************/ 
#include <openssl/bn.h>
#include <openssl/evp.h>
#include <openssl/dsa.h>
#include <openssl/asn1t.h>
#include <openssl/x509.h>
#include <openssl/engine.h>
#include <openssl/ec.h>
#include "gost89.h"
#include "gosthash.h"
/* Control commands */
#define GOST_PARAM_CRYPT_PARAMS 0
#define GOST_PARAM_MAX 0
#define GOST_CTRL_CRYPT_PARAMS (ENGINE_CMD_BASE+GOST_PARAM_CRYPT_PARAMS)

	extern const ENGINE_CMD_DEFN gost_cmds[];
	int gost_control_func(ENGINE *e,int cmd, long i, void *p, void (*f)(void));
	const char *get_gost_engine_param(int param);	
	int gost_set_default_param(int param, const char *value); 
	void gost_param_free(void);

/* method registration */

	int register_ameth_gost (int nid, EVP_PKEY_ASN1_METHOD **ameth, const char* pemstr, const char* info);
	int register_pmeth_gost (int id, EVP_PKEY_METHOD **pmeth, int flags);

/* Gost-specific pmeth control-function parameters */
/* For GOST R34.10 parameters */
#define param_ctrl_string "paramset"
#define EVP_PKEY_CTRL_GOST_PARAMSET (EVP_PKEY_ALG_CTRL+1)
/* For GOST 28147 MAC */
#define key_ctrl_string "key"
#define hexkey_ctrl_string "hexkey"
#define EVP_PKEY_CTRL_GOST_MAC_HEXKEY (EVP_PKEY_ALG_CTRL+3)
/* Pmeth internal representation */
	struct gost_pmeth_data {
   	    int sign_param_nid; /* Should be set whenever parameters are filled */
		EVP_MD *md;
		unsigned char *shared_ukm;
		int peer_key_used;
	};

	struct gost_mac_pmeth_data {
		int key_set;
		EVP_MD *md;
		unsigned char key[32];
	}	;
/* GOST-specific ASN1 structures */


typedef struct {
	ASN1_OCTET_STRING *encrypted_key;
	ASN1_OCTET_STRING *imit;
} GOST_KEY_INFO;

DECLARE_ASN1_FUNCTIONS(GOST_KEY_INFO)

typedef struct {
	ASN1_OBJECT *cipher;
	X509_PUBKEY *ephem_key;
	ASN1_OCTET_STRING *eph_iv;
} GOST_KEY_AGREEMENT_INFO;

DECLARE_ASN1_FUNCTIONS(GOST_KEY_AGREEMENT_INFO)
	
typedef struct {
	GOST_KEY_INFO *key_info;
	GOST_KEY_AGREEMENT_INFO *key_agreement_info;
} GOST_KEY_TRANSPORT;

DECLARE_ASN1_FUNCTIONS(GOST_KEY_TRANSPORT)

typedef struct { /* FIXME incomplete */
	GOST_KEY_TRANSPORT *gkt;
} GOST_CLIENT_KEY_EXCHANGE_PARAMS;

/* Hacks to shorten symbols to 31 characters or less, or OpenVMS.
   This mimics what's done in symhacks.h, but since this is a very
   local header file, I prefered to put this hack directly here.
   -- Richard Levitte */
#ifdef OPENSSL_SYS_VMS
#undef GOST_CLIENT_KEY_EXCHANGE_PARAMS_it
#define GOST_CLIENT_KEY_EXCHANGE_PARAMS_it	GOST_CLIENT_KEY_EXC_PARAMS_it
#undef GOST_CLIENT_KEY_EXCHANGE_PARAMS_new
#define GOST_CLIENT_KEY_EXCHANGE_PARAMS_new	GOST_CLIENT_KEY_EXC_PARAMS_new
#undef GOST_CLIENT_KEY_EXCHANGE_PARAMS_free
#define GOST_CLIENT_KEY_EXCHANGE_PARAMS_free	GOST_CLIENT_KEY_EXC_PARAMS_free
#undef d2i_GOST_CLIENT_KEY_EXCHANGE_PARAMS
#define d2i_GOST_CLIENT_KEY_EXCHANGE_PARAMS	d2i_GOST_CLIENT_KEY_EXC_PARAMS
#undef i2d_GOST_CLIENT_KEY_EXCHANGE_PARAMS
#define i2d_GOST_CLIENT_KEY_EXCHANGE_PARAMS	i2d_GOST_CLIENT_KEY_EXC_PARAMS
#endif /* End of hack */
DECLARE_ASN1_FUNCTIONS(GOST_CLIENT_KEY_EXCHANGE_PARAMS)
typedef struct {
	ASN1_OBJECT *key_params;
	ASN1_OBJECT *hash_params;
	ASN1_OBJECT *cipher_params;
} GOST_KEY_PARAMS;

DECLARE_ASN1_FUNCTIONS(GOST_KEY_PARAMS)

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

DECLARE_ASN1_FUNCTIONS(GOST_CIPHER_PARAMS)
/*============== Message digest  and cipher related structures  ==========*/
	 /* Structure used as EVP_MD_CTX-md_data. 
	  * It allows to avoid storing in the md-data pointers to
	  * dynamically allocated memory.
	  *
	  * I cannot invent better way to avoid memory leaks, because
	  * openssl insist on invoking Init on Final-ed digests, and there
	  * is no reliable way to find out whether pointer in the passed
	  * md_data is valid or not.
	  * */
struct ossl_gost_digest_ctx {
	gost_hash_ctx dctx;
	gost_ctx cctx;
};	
/* EVP_MD structure for GOST R 34.11 */
extern EVP_MD digest_gost;
/* EVP_MD structure for GOST 28147 in MAC mode */
extern EVP_MD imit_gost_cpa;
/* Cipher context used for EVP_CIPHER operation */
struct ossl_gost_cipher_ctx {
	int paramNID;
	unsigned int count;
	int key_meshing;
	gost_ctx cctx;
};	
/* Structure to map parameter NID to S-block */
struct gost_cipher_info {
	int nid;
	gost_subst_block *sblock;
	int key_meshing;
};
/* Context for MAC */
struct ossl_gost_imit_ctx {
	gost_ctx cctx;
	unsigned char buffer[8];
	unsigned char partial_block[8];
	unsigned int count;
	int key_meshing;
	int bytes_left;
	int key_set;
};	
/* Table which maps parameter NID to S-blocks */
extern struct gost_cipher_info gost_cipher_list[];
/* Find encryption params from ASN1_OBJECT */
const struct gost_cipher_info *get_encryption_params(ASN1_OBJECT *obj);
/* Implementation of GOST 28147-89 cipher in CFB and CNT modes */
extern EVP_CIPHER cipher_gost;
extern EVP_CIPHER cipher_gost_cpacnt;
#define EVP_MD_CTRL_KEY_LEN (EVP_MD_CTRL_ALG_CTRL+3)
#define EVP_MD_CTRL_SET_KEY (EVP_MD_CTRL_ALG_CTRL+4)
/* EVP_PKEY_METHOD key encryption callbacks */
/* From gost94_keyx.c */
int pkey_GOST94cp_encrypt(EVP_PKEY_CTX *ctx, unsigned char *out, size_t *outlen, const unsigned char* key, size_t key_len );

int pkey_GOST94cp_decrypt(EVP_PKEY_CTX *ctx, unsigned char *out, size_t *outlen, const unsigned char* in, size_t in_len );
/* From gost2001_keyx.c */
int pkey_GOST01cp_encrypt(EVP_PKEY_CTX *ctx, unsigned char *out, size_t *outlen, const unsigned char* key, size_t key_len );

int pkey_GOST01cp_decrypt(EVP_PKEY_CTX *ctx, unsigned char *out, size_t *outlen, const unsigned char* in, size_t in_len );
/* derive functions */
/* From gost2001_keyx.c */
int pkey_gost2001_derive(EVP_PKEY_CTX *ctx, unsigned char *key, size_t *keylen);
/* From gost94_keyx.c */
int pkey_gost94_derive(EVP_PKEY_CTX *ctx, unsigned char *key, size_t *keylen);
/* Internal functions for signature algorithms */
int fill_GOST94_params(DSA *dsa,int nid);
int fill_GOST2001_params(EC_KEY *eckey, int nid);
int gost_sign_keygen(DSA *dsa) ;
int gost2001_keygen(EC_KEY *ec) ;

DSA_SIG *gost_do_sign(const unsigned char *dgst,int dlen, DSA *dsa) ;
DSA_SIG *gost2001_do_sign(const unsigned char *dgst,int dlen, EC_KEY *eckey);

int gost_do_verify(const unsigned char *dgst, int dgst_len,
		DSA_SIG *sig, DSA *dsa) ;
int gost2001_do_verify(const unsigned char *dgst,int dgst_len,
			DSA_SIG *sig, EC_KEY *ec);
int gost2001_compute_public(EC_KEY *ec) ;
int gost94_compute_public(DSA *dsa) ;
/*============== miscellaneous functions============================= */
/* from gost_sign.c */
/* Convert GOST R 34.11 hash sum to bignum according to standard */
BIGNUM *hashsum2bn(const unsigned char *dgst) ;
/* Store bignum in byte array of given length, prepending by zeros
 * if nesseccary */
int store_bignum(BIGNUM *bn, unsigned char *buf,int len);
/* Read bignum, which can have few MSB all-zeros    from buffer*/ 
BIGNUM *getbnfrombuf(const unsigned char *buf,size_t len);
/* Pack GOST R 34.10 signature according to CryptoPro rules */
int pack_sign_cp(DSA_SIG *s,int order,unsigned char *sig, size_t *siglen); 
/* Unpack GOST R 34.10 signature according to CryptoPro rules */
DSA_SIG *unpack_cp_signature(const unsigned char *sig,size_t siglen) ;
/* from ameth.c */
/* Get private key as BIGNUM from both R 34.10-94 and R 34.10-2001  keys*/
/* Returns pointer into EVP_PKEY structure */
BIGNUM* gost_get0_priv_key(const EVP_PKEY *pkey) ;
/* Find NID by GOST 94 parameters */
int gost94_nid_by_params(DSA *p) ;


#endif