engines/ccgost/gost_lcl.h

   1 #ifndef GOST_TOOLS_H
   2 #define GOST_TOOLS_H
   3 /**********************************************************************
   4  *                        gost_lcl.h                                  *
   5  *             Copyright (c) 2006 Cryptocom LTD                       *
   6  *       This file is distributed under the same license as OpenSSL   *
   7  *                                                                    *
   8  *         Internal declarations  used in GOST engine                *
   9  *         OpenSSL 0.9.9 libraries required to compile and use        *
  10  *                              this code                             *
  11  **********************************************************************/
  12 #include <openssl/bn.h>
  13 #include <openssl/evp.h>
  14 #include <openssl/dsa.h>
  15 #include <openssl/asn1t.h>
  16 #include <openssl/x509.h>
  17 #include <openssl/engine.h>
  18 #include <openssl/ec.h>
  19 #include <unistd.h>
  20 #include "gost89.h"
  21 #include "gosthash.h"
  22 /* Control commands */
  23 #define GOST_PARAM_CRYPT_PARAMS 0
  24 #define GOST_PARAM_MAX 0
  25 #define GOST_CTRL_CRYPT_PARAMS (ENGINE_CMD_BASE+GOST_PARAM_CRYPT_PARAMS)
  26
  27         extern const ENGINE_CMD_DEFN gost_cmds[];
  28         int gost_control_func(ENGINE *e,int cmd, long i, void *p, void (*f)(void));
  29         const char *get_gost_engine_param(int param);
  30         int gost_set_default_param(int param, const char *value);
  31         void gost_param_free(void);
  32
  33 /* method registration */
  34
  35         int register_ameth_gost (int nid, EVP_PKEY_ASN1_METHOD **ameth, const char* pemstr, const char* info);
  36         int register_pmeth_gost (int id, EVP_PKEY_METHOD **pmeth, int flags);
  37
  38 /* Gost-specific pmeth control-function parameters */
  39 /* For GOST R34.10 parameters */
  40 #define param_ctrl_string "paramset"
  41 #define EVP_PKEY_CTRL_GOST_PARAMSET (EVP_PKEY_ALG_CTRL+1)
  42 /* For GOST 28147 MAC */
  43 #define key_ctrl_string "key"
  44 #define hexkey_ctrl_string "hexkey"
  45 #define EVP_PKEY_CTRL_GOST_MAC_HEXKEY (EVP_PKEY_ALG_CTRL+3)
  46 /* Pmeth internal representation */
  47         struct gost_pmeth_data {
  48             int sign_param_nid; /* Should be set whenever parameters are filled */
  49                 EVP_MD *md;
  50                 unsigned char *shared_ukm;
  51         };
  52
  53         struct gost_mac_pmeth_data {
  54                 int key_set;
  55                 EVP_MD *md;
  56                 unsigned char key[32];
  57         }       ;
  58 /* GOST-specific ASN1 structures */
  59
  60
  61 typedef struct {
  62         ASN1_OCTET_STRING *encrypted_key;
  63         ASN1_OCTET_STRING *imit;
  64 } GOST_KEY_INFO;
  65
  66 DECLARE_ASN1_FUNCTIONS(GOST_KEY_INFO)
  67
  68 typedef struct {
  69         ASN1_OBJECT *cipher;
  70         X509_PUBKEY *ephem_key;
  71         ASN1_OCTET_STRING *eph_iv;
  72 } GOST_KEY_AGREEMENT_INFO;
  73
  74 DECLARE_ASN1_FUNCTIONS(GOST_KEY_AGREEMENT_INFO)
  75
  76 typedef struct {
  77         GOST_KEY_INFO *key_info;
  78         GOST_KEY_AGREEMENT_INFO *key_agreement_info;
  79 } GOST_KEY_TRANSPORT;
  80
  81 DECLARE_ASN1_FUNCTIONS(GOST_KEY_TRANSPORT)
  82
  83 typedef struct { /* FIXME incomplete */
  84         GOST_KEY_TRANSPORT *gkt;
  85 } GOST_CLIENT_KEY_EXCHANGE_PARAMS;
  86
  87 DECLARE_ASN1_FUNCTIONS(GOST_CLIENT_KEY_EXCHANGE_PARAMS)
  88 typedef struct {
  89         ASN1_OBJECT *key_params;
  90         ASN1_OBJECT *hash_params;
  91         ASN1_OBJECT *cipher_params;
  92 } GOST_KEY_PARAMS;
  93
  94 DECLARE_ASN1_FUNCTIONS(GOST_KEY_PARAMS)
  95
  96 typedef struct {
  97         ASN1_OCTET_STRING *iv;
  98         ASN1_OBJECT *enc_param_set;
  99 } GOST_CIPHER_PARAMS;
 100
 101 DECLARE_ASN1_FUNCTIONS(GOST_CIPHER_PARAMS)
 102 /*============== Message digest  and cipher related structures  ==========*/
 103          /* Structure used as EVP_MD_CTX-md_data.
 104           * It allows to avoid storing in the md-data pointers to
 105           * dynamically allocated memory.
 106           *
 107           * I cannot invent better way to avoid memory leaks, because
 108           * openssl insist on invoking Init on Final-ed digests, and there
 109           * is no reliable way to find out whether pointer in the passed
 110           * md_data is valid or not.
 111           * */
 112 struct ossl_gost_digest_ctx {
 113         gost_hash_ctx dctx;
 114         gost_ctx cctx;
 115 };
 116 /* EVP_MD structure for GOST R 34.11 */
 117 extern EVP_MD digest_gost;
 118 /* EVP_MD structure for GOST 28147 in MAC mode */
 119 extern EVP_MD imit_gost_cpa;
 120 /* Cipher context used for EVP_CIPHER operation */
 121 struct ossl_gost_cipher_ctx {
 122         int paramNID;
 123         off_t count;
 124         int key_meshing;
 125         gost_ctx cctx;
 126 };
 127 /* Structure to map parameter NID to S-block */
 128 struct gost_cipher_info {
 129         int nid;
 130         gost_subst_block *sblock;
 131         int key_meshing;
 132 };
 133 /* Context for MAC */
 134 struct ossl_gost_imit_ctx {
 135         gost_ctx cctx;
 136         unsigned char buffer[8];
 137         unsigned char partial_block[8];
 138         off_t count;
 139         int key_meshing;
 140         int bytes_left;
 141         int key_set;
 142 };
 143 /* Table which maps parameter NID to S-blocks */
 144 extern struct gost_cipher_info gost_cipher_list[];
 145 /* Find encryption params from ASN1_OBJECT */
 146 const struct gost_cipher_info *get_encryption_params(ASN1_OBJECT *obj);
 147 /* Implementation of GOST 28147-89 cipher in CFB and CNT modes */
 148 extern EVP_CIPHER cipher_gost;
 149 extern EVP_CIPHER cipher_gost_cpacnt;
 150 #define EVP_MD_CTRL_KEY_LEN (EVP_MD_CTRL_ALG_CTRL+3)
 151 #define EVP_MD_CTRL_SET_KEY (EVP_MD_CTRL_ALG_CTRL+4)
 152 /* EVP_PKEY_METHOD key encryption callbacks */
 153 /* From gost94_keyx.c */
 154 int pkey_GOST94cp_encrypt(EVP_PKEY_CTX *ctx, unsigned char *out, size_t *outlen, const unsigned char* key, size_t key_len );
 155
 156 int pkey_GOST94cp_decrypt(EVP_PKEY_CTX *ctx, unsigned char *out, size_t *outlen, const unsigned char* in, size_t in_len );
 157 /* From gost2001_keyx.c */
 158 int pkey_GOST01cp_encrypt(EVP_PKEY_CTX *ctx, unsigned char *out, size_t *outlen, const unsigned char* key, size_t key_len );
 159
 160 int pkey_GOST01cp_decrypt(EVP_PKEY_CTX *ctx, unsigned char *out, size_t *outlen, const unsigned char* in, size_t in_len );
 161 /* derive functions */
 162 /* From gost2001_keyx.c */
 163 int pkey_gost2001_derive(EVP_PKEY_CTX *ctx, unsigned char *key, size_t *keylen);
 164 /* From gost94_keyx.c */
 165 int pkey_gost94_derive(EVP_PKEY_CTX *ctx, unsigned char *key, size_t *keylen);
 166 /* Internal functions for signature algorithms */
 167 int fill_GOST94_params(DSA *dsa,int nid);
 168 int fill_GOST2001_params(EC_KEY *eckey, int nid);
 169 int gost_sign_keygen(DSA *dsa) ;
 170 int gost2001_keygen(EC_KEY *ec) ;
 171
 172 DSA_SIG *gost_do_sign(const unsigned char *dgst,int dlen, DSA *dsa) ;
 173 DSA_SIG *gost2001_do_sign(const unsigned char *dgst,int dlen, EC_KEY *eckey);
 174
 175 int gost_do_verify(const unsigned char *dgst, int dgst_len,
 176                 DSA_SIG *sig, DSA *dsa) ;
 177 int gost2001_do_verify(const unsigned char *dgst,int dgst_len,
 178                         DSA_SIG *sig, EC_KEY *ec);
 179 int gost2001_compute_public(EC_KEY *ec) ;
 180 int gost94_compute_public(DSA *dsa) ;
 181 /*============== miscellaneous functions============================= */
 182 /* from gost_sign.c */
 183 /* Convert GOST R 34.11 hash sum to bignum according to standard */
 184 BIGNUM *hashsum2bn(const unsigned char *dgst) ;
 185 /* Store bignum in byte array of given length, prepending by zeros
 186  * if nesseccary */
 187 int store_bignum(BIGNUM *bn, unsigned char *buf,int len);
 188 /* Read bignum, which can have few MSB all-zeros    from buffer*/
 189 BIGNUM *getbnfrombuf(const unsigned char *buf,size_t len);
 190 /* Pack GOST R 34.10 signature according to CryptoPro rules */
 191 int pack_sign_cp(DSA_SIG *s,int order,unsigned char *sig, size_t *siglen);
 192 /* Unpack GOST R 34.10 signature according to CryptoPro rules */
 193 DSA_SIG *unpack_cp_signature(const unsigned char *sig,size_t siglen) ;
 194 /* from ameth.c */
 195 /* Get private key as BIGNUM from both R 34.10-94 and R 34.10-2001  keys*/
 196 /* Returns pointer into EVP_PKEY structure */
 197 BIGNUM* gost_get0_priv_key(const EVP_PKEY *pkey) ;
 198 /* Find NID by GOST 94 parameters */
 199 int gost94_nid_by_params(DSA *p) ;
 200
 201
 202 #endif