230 lines
8.4 KiB
C
230 lines
8.4 KiB
C
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#ifndef GOST_TOOLS_H
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# define GOST_TOOLS_H
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/**********************************************************************
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* gost_lcl.h *
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* Copyright (c) 2006 Cryptocom LTD *
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* This file is distributed under the same license as OpenSSL *
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* *
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* Internal declarations used in GOST engine *
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* OpenSSL 0.9.9 libraries required to compile and use *
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* this code *
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**********************************************************************/
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# include <openssl/bn.h>
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# include <openssl/evp.h>
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# include <openssl/dsa.h>
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# include <openssl/asn1t.h>
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# include <openssl/x509.h>
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# include <openssl/engine.h>
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# include <openssl/ec.h>
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# include "gost89.h"
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# include "gosthash.h"
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/* Control commands */
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# define GOST_PARAM_CRYPT_PARAMS 0
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# define GOST_PARAM_MAX 0
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# define GOST_CTRL_CRYPT_PARAMS (ENGINE_CMD_BASE+GOST_PARAM_CRYPT_PARAMS)
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extern const ENGINE_CMD_DEFN gost_cmds[];
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int gost_control_func(ENGINE *e, int cmd, long i, void *p, void (*f) (void));
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const char *get_gost_engine_param(int param);
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int gost_set_default_param(int param, const char *value);
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void gost_param_free(void);
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/* method registration */
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int register_ameth_gost(int nid, EVP_PKEY_ASN1_METHOD **ameth,
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const char *pemstr, const char *info);
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int register_pmeth_gost(int id, EVP_PKEY_METHOD **pmeth, int flags);
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/* Gost-specific pmeth control-function parameters */
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/* For GOST R34.10 parameters */
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# define param_ctrl_string "paramset"
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# define EVP_PKEY_CTRL_GOST_PARAMSET (EVP_PKEY_ALG_CTRL+1)
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/* For GOST 28147 MAC */
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# define key_ctrl_string "key"
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# define hexkey_ctrl_string "hexkey"
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# define EVP_PKEY_CTRL_GOST_MAC_HEXKEY (EVP_PKEY_ALG_CTRL+3)
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/* Pmeth internal representation */
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struct gost_pmeth_data {
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int sign_param_nid; /* Should be set whenever parameters are
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* filled */
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EVP_MD *md;
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unsigned char *shared_ukm;
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int peer_key_used;
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};
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struct gost_mac_pmeth_data {
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int key_set;
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EVP_MD *md;
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unsigned char key[32];
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};
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/* GOST-specific ASN1 structures */
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typedef struct {
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ASN1_OCTET_STRING *encrypted_key;
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ASN1_OCTET_STRING *imit;
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} GOST_KEY_INFO;
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DECLARE_ASN1_FUNCTIONS(GOST_KEY_INFO)
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typedef struct {
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ASN1_OBJECT *cipher;
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X509_PUBKEY *ephem_key;
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ASN1_OCTET_STRING *eph_iv;
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} GOST_KEY_AGREEMENT_INFO;
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DECLARE_ASN1_FUNCTIONS(GOST_KEY_AGREEMENT_INFO)
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typedef struct {
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GOST_KEY_INFO *key_info;
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GOST_KEY_AGREEMENT_INFO *key_agreement_info;
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} GOST_KEY_TRANSPORT;
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DECLARE_ASN1_FUNCTIONS(GOST_KEY_TRANSPORT)
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typedef struct { /* FIXME incomplete */
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GOST_KEY_TRANSPORT *gkt;
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} GOST_CLIENT_KEY_EXCHANGE_PARAMS;
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/*
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* Hacks to shorten symbols to 31 characters or less, or OpenVMS. This mimics
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* what's done in symhacks.h, but since this is a very local header file, I
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* prefered to put this hack directly here. -- Richard Levitte
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*/
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# ifdef OPENSSL_SYS_VMS
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# undef GOST_CLIENT_KEY_EXCHANGE_PARAMS_it
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# define GOST_CLIENT_KEY_EXCHANGE_PARAMS_it GOST_CLIENT_KEY_EXC_PARAMS_it
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# undef GOST_CLIENT_KEY_EXCHANGE_PARAMS_new
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# define GOST_CLIENT_KEY_EXCHANGE_PARAMS_new GOST_CLIENT_KEY_EXC_PARAMS_new
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# undef GOST_CLIENT_KEY_EXCHANGE_PARAMS_free
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# define GOST_CLIENT_KEY_EXCHANGE_PARAMS_free GOST_CLIENT_KEY_EXC_PARAMS_free
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# undef d2i_GOST_CLIENT_KEY_EXCHANGE_PARAMS
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# define d2i_GOST_CLIENT_KEY_EXCHANGE_PARAMS d2i_GOST_CLIENT_KEY_EXC_PARAMS
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# undef i2d_GOST_CLIENT_KEY_EXCHANGE_PARAMS
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# define i2d_GOST_CLIENT_KEY_EXCHANGE_PARAMS i2d_GOST_CLIENT_KEY_EXC_PARAMS
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# endif /* End of hack */
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DECLARE_ASN1_FUNCTIONS(GOST_CLIENT_KEY_EXCHANGE_PARAMS)
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typedef struct {
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ASN1_OBJECT *key_params;
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ASN1_OBJECT *hash_params;
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ASN1_OBJECT *cipher_params;
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} GOST_KEY_PARAMS;
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DECLARE_ASN1_FUNCTIONS(GOST_KEY_PARAMS)
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typedef struct {
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ASN1_OCTET_STRING *iv;
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ASN1_OBJECT *enc_param_set;
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} GOST_CIPHER_PARAMS;
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DECLARE_ASN1_FUNCTIONS(GOST_CIPHER_PARAMS)
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/*============== Message digest and cipher related structures ==========*/
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/*
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* Structure used as EVP_MD_CTX-md_data. It allows to avoid storing
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* in the md-data pointers to dynamically allocated memory. I
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* cannot invent better way to avoid memory leaks, because openssl
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* insist on invoking Init on Final-ed digests, and there is no
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* reliable way to find out whether pointer in the passed md_data is
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* valid or not.
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*/
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struct ossl_gost_digest_ctx {
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gost_hash_ctx dctx;
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gost_ctx cctx;
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};
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/* EVP_MD structure for GOST R 34.11 */
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extern EVP_MD digest_gost;
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/* EVP_MD structure for GOST 28147 in MAC mode */
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extern EVP_MD imit_gost_cpa;
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/* Cipher context used for EVP_CIPHER operation */
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struct ossl_gost_cipher_ctx {
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int paramNID;
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unsigned int count;
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int key_meshing;
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gost_ctx cctx;
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};
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/* Structure to map parameter NID to S-block */
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struct gost_cipher_info {
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int nid;
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gost_subst_block *sblock;
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int key_meshing;
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};
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/* Context for MAC */
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struct ossl_gost_imit_ctx {
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gost_ctx cctx;
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unsigned char buffer[8];
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unsigned char partial_block[8];
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unsigned int count;
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int key_meshing;
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int bytes_left;
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int key_set;
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};
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/* Table which maps parameter NID to S-blocks */
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extern struct gost_cipher_info gost_cipher_list[];
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/* Find encryption params from ASN1_OBJECT */
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const struct gost_cipher_info *get_encryption_params(ASN1_OBJECT *obj);
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/* Implementation of GOST 28147-89 cipher in CFB and CNT modes */
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extern EVP_CIPHER cipher_gost;
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extern EVP_CIPHER cipher_gost_cpacnt;
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# define EVP_MD_CTRL_KEY_LEN (EVP_MD_CTRL_ALG_CTRL+3)
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# define EVP_MD_CTRL_SET_KEY (EVP_MD_CTRL_ALG_CTRL+4)
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/* EVP_PKEY_METHOD key encryption callbacks */
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/* From gost94_keyx.c */
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int pkey_GOST94cp_encrypt(EVP_PKEY_CTX *ctx, unsigned char *out,
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size_t *outlen, const unsigned char *key,
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size_t key_len);
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int pkey_GOST94cp_decrypt(EVP_PKEY_CTX *ctx, unsigned char *out,
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size_t *outlen, const unsigned char *in,
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size_t in_len);
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/* From gost2001_keyx.c */
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int pkey_GOST01cp_encrypt(EVP_PKEY_CTX *ctx, unsigned char *out,
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size_t *outlen, const unsigned char *key,
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size_t key_len);
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int pkey_GOST01cp_decrypt(EVP_PKEY_CTX *ctx, unsigned char *out,
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size_t *outlen, const unsigned char *in,
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size_t in_len);
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/* derive functions */
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/* From gost2001_keyx.c */
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int pkey_gost2001_derive(EVP_PKEY_CTX *ctx, unsigned char *key,
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size_t *keylen);
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/* From gost94_keyx.c */
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int pkey_gost94_derive(EVP_PKEY_CTX *ctx, unsigned char *key, size_t *keylen);
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/* Internal functions for signature algorithms */
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int fill_GOST94_params(DSA *dsa, int nid);
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int fill_GOST2001_params(EC_KEY *eckey, int nid);
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int gost_sign_keygen(DSA *dsa);
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int gost2001_keygen(EC_KEY *ec);
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DSA_SIG *gost_do_sign(const unsigned char *dgst, int dlen, DSA *dsa);
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DSA_SIG *gost2001_do_sign(const unsigned char *dgst, int dlen, EC_KEY *eckey);
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int gost_do_verify(const unsigned char *dgst, int dgst_len,
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DSA_SIG *sig, DSA *dsa);
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int gost2001_do_verify(const unsigned char *dgst, int dgst_len,
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DSA_SIG *sig, EC_KEY *ec);
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int gost2001_compute_public(EC_KEY *ec);
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int gost94_compute_public(DSA *dsa);
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/*============== miscellaneous functions============================= */
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/* from gost_sign.c */
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/* Convert GOST R 34.11 hash sum to bignum according to standard */
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BIGNUM *hashsum2bn(const unsigned char *dgst);
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/*
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* Store bignum in byte array of given length, prepending by zeros if
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* nesseccary
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*/
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int store_bignum(BIGNUM *bn, unsigned char *buf, int len);
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/* Read bignum, which can have few MSB all-zeros from buffer*/
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BIGNUM *getbnfrombuf(const unsigned char *buf, size_t len);
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/* Pack GOST R 34.10 signature according to CryptoPro rules */
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int pack_sign_cp(DSA_SIG *s, int order, unsigned char *sig, size_t *siglen);
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/* Unpack GOST R 34.10 signature according to CryptoPro rules */
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DSA_SIG *unpack_cp_signature(const unsigned char *sig, size_t siglen);
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/* from ameth.c */
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/* Get private key as BIGNUM from both R 34.10-94 and R 34.10-2001 keys*/
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/* Returns pointer into EVP_PKEY structure */
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BIGNUM *gost_get0_priv_key(const EVP_PKEY *pkey);
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/* Find NID by GOST 94 parameters */
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int gost94_nid_by_params(DSA *p);
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#endif
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