crypto/openssl/engines/e_nuron.c

   1 /* crypto/engine/hw_nuron.c */
   2 /* Written by Ben Laurie for the OpenSSL Project, leaning heavily on Geoff
   3  * Thorpe's Atalla implementation.
   4  */
   5 /* ====================================================================
   6  * Copyright (c) 2000-2001 The OpenSSL Project.  All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  *
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  *
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in
  17  *    the documentation and/or other materials provided with the
  18  *    distribution.
  19  *
  20  * 3. All advertising materials mentioning features or use of this
  21  *    software must display the following acknowledgment:
  22  *    "This product includes software developed by the OpenSSL Project
  23  *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
  24  *
  25  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  26  *    endorse or promote products derived from this software without
  27  *    prior written permission. For written permission, please contact
  28  *    licensing@OpenSSL.org.
  29  *
  30  * 5. Products derived from this software may not be called "OpenSSL"
  31  *    nor may "OpenSSL" appear in their names without prior written
  32  *    permission of the OpenSSL Project.
  33  *
  34  * 6. Redistributions of any form whatsoever must retain the following
  35  *    acknowledgment:
  36  *    "This product includes software developed by the OpenSSL Project
  37  *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
  38  *
  39  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  40  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  41  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  42  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  43  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  44  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  45  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  46  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  47  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  48  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  49  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  50  * OF THE POSSIBILITY OF SUCH DAMAGE.
  51  * ====================================================================
  52  *
  53  * This product includes cryptographic software written by Eric Young
  54  * (eay@cryptsoft.com).  This product includes software written by Tim
  55  * Hudson (tjh@cryptsoft.com).
  56  *
  57  */
  58
  59 #include <stdio.h>
  60 #include <string.h>
  61 #include <openssl/crypto.h>
  62 #include <openssl/buffer.h>
  63 #include <openssl/dso.h>
  64 #include <openssl/engine.h>
  65 #ifndef OPENSSL_NO_RSA
  66 #include <openssl/rsa.h>
  67 #endif
  68 #ifndef OPENSSL_NO_DSA
  69 #include <openssl/dsa.h>
  70 #endif
  71 #ifndef OPENSSL_NO_DH
  72 #include <openssl/dh.h>
  73 #endif
  74 #include <openssl/bn.h>
  75
  76 #ifndef OPENSSL_NO_HW
  77 #ifndef OPENSSL_NO_HW_NURON
  78
  79 #define NURON_LIB_NAME "nuron engine"
  80 #include "e_nuron_err.c"
  81
  82 static const char *NURON_LIBNAME = NULL;
  83 static const char *get_NURON_LIBNAME(void)
  84         {
  85         if(NURON_LIBNAME)
  86                 return NURON_LIBNAME;
  87         return "nuronssl";
  88         }
  89 static void free_NURON_LIBNAME(void)
  90         {
  91         if(NURON_LIBNAME)
  92                 OPENSSL_free((void*)NURON_LIBNAME);
  93         NURON_LIBNAME = NULL;
  94         }
  95 static long set_NURON_LIBNAME(const char *name)
  96         {
  97         free_NURON_LIBNAME();
  98         return (((NURON_LIBNAME = BUF_strdup(name)) != NULL) ? 1 : 0);
  99         }
 100 static const char *NURON_F1 = "nuron_mod_exp";
 101
 102 /* The definitions for control commands specific to this engine */
 103 #define NURON_CMD_SO_PATH               ENGINE_CMD_BASE
 104 static const ENGINE_CMD_DEFN nuron_cmd_defns[] = {
 105         {NURON_CMD_SO_PATH,
 106                 "SO_PATH",
 107                 "Specifies the path to the 'nuronssl' shared library",
 108                 ENGINE_CMD_FLAG_STRING},
 109         {0, NULL, NULL, 0}
 110         };
 111
 112 typedef int tfnModExp(BIGNUM *r,const BIGNUM *a,const BIGNUM *p,const BIGNUM *m);
 113 static tfnModExp *pfnModExp = NULL;
 114
 115 static DSO *pvDSOHandle = NULL;
 116
 117 static int nuron_destroy(ENGINE *e)
 118         {
 119         free_NURON_LIBNAME();
 120         ERR_unload_NURON_strings();
 121         return 1;
 122         }
 123
 124 static int nuron_init(ENGINE *e)
 125         {
 126         if(pvDSOHandle != NULL)
 127                 {
 128                 NURONerr(NURON_F_NURON_INIT,NURON_R_ALREADY_LOADED);
 129                 return 0;
 130                 }
 131
 132         pvDSOHandle = DSO_load(NULL, get_NURON_LIBNAME(), NULL,
 133                 DSO_FLAG_NAME_TRANSLATION_EXT_ONLY);
 134         if(!pvDSOHandle)
 135                 {
 136                 NURONerr(NURON_F_NURON_INIT,NURON_R_DSO_NOT_FOUND);
 137                 return 0;
 138                 }
 139
 140         pfnModExp = (tfnModExp *)DSO_bind_func(pvDSOHandle, NURON_F1);
 141         if(!pfnModExp)
 142                 {
 143                 NURONerr(NURON_F_NURON_INIT,NURON_R_DSO_FUNCTION_NOT_FOUND);
 144                 return 0;
 145                 }
 146
 147         return 1;
 148         }
 149
 150 static int nuron_finish(ENGINE *e)
 151         {
 152         free_NURON_LIBNAME();
 153         if(pvDSOHandle == NULL)
 154                 {
 155                 NURONerr(NURON_F_NURON_FINISH,NURON_R_NOT_LOADED);
 156                 return 0;
 157                 }
 158         if(!DSO_free(pvDSOHandle))
 159                 {
 160                 NURONerr(NURON_F_NURON_FINISH,NURON_R_DSO_FAILURE);
 161                 return 0;
 162                 }
 163         pvDSOHandle=NULL;
 164         pfnModExp=NULL;
 165         return 1;
 166         }
 167
 168 static int nuron_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f)(void))
 169         {
 170         int initialised = ((pvDSOHandle == NULL) ? 0 : 1);
 171         switch(cmd)
 172                 {
 173         case NURON_CMD_SO_PATH:
 174                 if(p == NULL)
 175                         {
 176                         NURONerr(NURON_F_NURON_CTRL,ERR_R_PASSED_NULL_PARAMETER);
 177                         return 0;
 178                         }
 179                 if(initialised)
 180                         {
 181                         NURONerr(NURON_F_NURON_CTRL,NURON_R_ALREADY_LOADED);
 182                         return 0;
 183                         }
 184                 return set_NURON_LIBNAME((const char *)p);
 185         default:
 186                 break;
 187                 }
 188         NURONerr(NURON_F_NURON_CTRL,NURON_R_CTRL_COMMAND_NOT_IMPLEMENTED);
 189         return 0;
 190 }
 191
 192 static int nuron_mod_exp(BIGNUM *r,const BIGNUM *a,const BIGNUM *p,
 193                          const BIGNUM *m,BN_CTX *ctx)
 194         {
 195         if(!pvDSOHandle)
 196                 {
 197                 NURONerr(NURON_F_NURON_MOD_EXP,NURON_R_NOT_LOADED);
 198                 return 0;
 199                 }
 200         return pfnModExp(r,a,p,m);
 201         }
 202
 203 #ifndef OPENSSL_NO_RSA
 204 static int nuron_rsa_mod_exp(BIGNUM *r0, const BIGNUM *I, RSA *rsa, BN_CTX *ctx)
 205         {
 206         return nuron_mod_exp(r0,I,rsa->d,rsa->n,ctx);
 207         }
 208 #endif
 209
 210 #ifndef OPENSSL_NO_DSA
 211 /* This code was liberated and adapted from the commented-out code in
 212  * dsa_ossl.c. Because of the unoptimised form of the Atalla acceleration
 213  * (it doesn't have a CRT form for RSA), this function means that an
 214  * Atalla system running with a DSA server certificate can handshake
 215  * around 5 or 6 times faster/more than an equivalent system running with
 216  * RSA. Just check out the "signs" statistics from the RSA and DSA parts
 217  * of "openssl speed -engine atalla dsa1024 rsa1024". */
 218 static int nuron_dsa_mod_exp(DSA *dsa, BIGNUM *rr, BIGNUM *a1,
 219                              BIGNUM *p1, BIGNUM *a2, BIGNUM *p2, BIGNUM *m,
 220                              BN_CTX *ctx, BN_MONT_CTX *in_mont)
 221         {
 222         BIGNUM t;
 223         int to_return = 0;
 224
 225         BN_init(&t);
 226         /* let rr = a1 ^ p1 mod m */
 227         if (!nuron_mod_exp(rr,a1,p1,m,ctx))
 228                 goto end;
 229         /* let t = a2 ^ p2 mod m */
 230         if (!nuron_mod_exp(&t,a2,p2,m,ctx))
 231                 goto end;
 232         /* let rr = rr * t mod m */
 233         if (!BN_mod_mul(rr,rr,&t,m,ctx))
 234                 goto end;
 235         to_return = 1;
 236 end:
 237         BN_free(&t);
 238         return to_return;
 239         }
 240
 241
 242 static int nuron_mod_exp_dsa(DSA *dsa, BIGNUM *r, BIGNUM *a,
 243                              const BIGNUM *p, const BIGNUM *m, BN_CTX *ctx,
 244                              BN_MONT_CTX *m_ctx)
 245         {
 246         return nuron_mod_exp(r, a, p, m, ctx);
 247         }
 248 #endif
 249
 250 /* This function is aliased to mod_exp (with the mont stuff dropped). */
 251 #ifndef OPENSSL_NO_RSA
 252 static int nuron_mod_exp_mont(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
 253                               const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx)
 254         {
 255         return nuron_mod_exp(r, a, p, m, ctx);
 256         }
 257 #endif
 258
 259 #ifndef OPENSSL_NO_DH
 260 /* This function is aliased to mod_exp (with the dh and mont dropped). */
 261 static int nuron_mod_exp_dh(const DH *dh, BIGNUM *r,
 262                 const BIGNUM *a, const BIGNUM *p,
 263                 const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx)
 264         {
 265         return nuron_mod_exp(r, a, p, m, ctx);
 266         }
 267 #endif
 268
 269 #ifndef OPENSSL_NO_RSA
 270 static RSA_METHOD nuron_rsa =
 271         {
 272         "Nuron RSA method",
 273         NULL,
 274         NULL,
 275         NULL,
 276         NULL,
 277         nuron_rsa_mod_exp,
 278         nuron_mod_exp_mont,
 279         NULL,
 280         NULL,
 281         0,
 282         NULL,
 283         NULL,
 284         NULL,
 285         NULL
 286         };
 287 #endif
 288
 289 #ifndef OPENSSL_NO_DSA
 290 static DSA_METHOD nuron_dsa =
 291         {
 292         "Nuron DSA method",
 293         NULL, /* dsa_do_sign */
 294         NULL, /* dsa_sign_setup */
 295         NULL, /* dsa_do_verify */
 296         nuron_dsa_mod_exp, /* dsa_mod_exp */
 297         nuron_mod_exp_dsa, /* bn_mod_exp */
 298         NULL, /* init */
 299         NULL, /* finish */
 300         0, /* flags */
 301         NULL, /* app_data */
 302         NULL, /* dsa_paramgen */
 303         NULL /* dsa_keygen */
 304         };
 305 #endif
 306
 307 #ifndef OPENSSL_NO_DH
 308 static DH_METHOD nuron_dh =
 309         {
 310         "Nuron DH method",
 311         NULL,
 312         NULL,
 313         nuron_mod_exp_dh,
 314         NULL,
 315         NULL,
 316         0,
 317         NULL,
 318         NULL
 319         };
 320 #endif
 321
 322 /* Constants used when creating the ENGINE */
 323 static const char *engine_nuron_id = "nuron";
 324 static const char *engine_nuron_name = "Nuron hardware engine support";
 325
 326 /* This internal function is used by ENGINE_nuron() and possibly by the
 327  * "dynamic" ENGINE support too */
 328 static int bind_helper(ENGINE *e)
 329         {
 330 #ifndef OPENSSL_NO_RSA
 331         const RSA_METHOD *meth1;
 332 #endif
 333 #ifndef OPENSSL_NO_DSA
 334         const DSA_METHOD *meth2;
 335 #endif
 336 #ifndef OPENSSL_NO_DH
 337         const DH_METHOD *meth3;
 338 #endif
 339         if(!ENGINE_set_id(e, engine_nuron_id) ||
 340                         !ENGINE_set_name(e, engine_nuron_name) ||
 341 #ifndef OPENSSL_NO_RSA
 342                         !ENGINE_set_RSA(e, &nuron_rsa) ||
 343 #endif
 344 #ifndef OPENSSL_NO_DSA
 345                         !ENGINE_set_DSA(e, &nuron_dsa) ||
 346 #endif
 347 #ifndef OPENSSL_NO_DH
 348                         !ENGINE_set_DH(e, &nuron_dh) ||
 349 #endif
 350                         !ENGINE_set_destroy_function(e, nuron_destroy) ||
 351                         !ENGINE_set_init_function(e, nuron_init) ||
 352                         !ENGINE_set_finish_function(e, nuron_finish) ||
 353                         !ENGINE_set_ctrl_function(e, nuron_ctrl) ||
 354                         !ENGINE_set_cmd_defns(e, nuron_cmd_defns))
 355                 return 0;
 356
 357 #ifndef OPENSSL_NO_RSA
 358         /* We know that the "PKCS1_SSLeay()" functions hook properly
 359          * to the nuron-specific mod_exp and mod_exp_crt so we use
 360          * those functions. NB: We don't use ENGINE_openssl() or
 361          * anything "more generic" because something like the RSAref
 362          * code may not hook properly, and if you own one of these
 363          * cards then you have the right to do RSA operations on it
 364          * anyway! */
 365         meth1=RSA_PKCS1_SSLeay();
 366         nuron_rsa.rsa_pub_enc=meth1->rsa_pub_enc;
 367         nuron_rsa.rsa_pub_dec=meth1->rsa_pub_dec;
 368         nuron_rsa.rsa_priv_enc=meth1->rsa_priv_enc;
 369         nuron_rsa.rsa_priv_dec=meth1->rsa_priv_dec;
 370 #endif
 371
 372 #ifndef OPENSSL_NO_DSA
 373         /* Use the DSA_OpenSSL() method and just hook the mod_exp-ish
 374          * bits. */
 375         meth2=DSA_OpenSSL();
 376         nuron_dsa.dsa_do_sign=meth2->dsa_do_sign;
 377         nuron_dsa.dsa_sign_setup=meth2->dsa_sign_setup;
 378         nuron_dsa.dsa_do_verify=meth2->dsa_do_verify;
 379 #endif
 380
 381 #ifndef OPENSSL_NO_DH
 382         /* Much the same for Diffie-Hellman */
 383         meth3=DH_OpenSSL();
 384         nuron_dh.generate_key=meth3->generate_key;
 385         nuron_dh.compute_key=meth3->compute_key;
 386 #endif
 387
 388         /* Ensure the nuron error handling is set up */
 389         ERR_load_NURON_strings();
 390         return 1;
 391         }
 392
 393 #ifdef OPENSSL_NO_DYNAMIC_ENGINE
 394 static ENGINE *engine_nuron(void)
 395         {
 396         ENGINE *ret = ENGINE_new();
 397         if(!ret)
 398                 return NULL;
 399         if(!bind_helper(ret))
 400                 {
 401                 ENGINE_free(ret);
 402                 return NULL;
 403                 }
 404         return ret;
 405         }
 406
 407 void ENGINE_load_nuron(void)
 408         {
 409         /* Copied from eng_[openssl|dyn].c */
 410         ENGINE *toadd = engine_nuron();
 411         if(!toadd) return;
 412         ENGINE_add(toadd);
 413         ENGINE_free(toadd);
 414         ERR_clear_error();
 415         }
 416 #endif
 417
 418 /* This stuff is needed if this ENGINE is being compiled into a self-contained
 419  * shared-library. */
 420 #ifndef OPENSSL_NO_DYNAMIC_ENGINE
 421 static int bind_fn(ENGINE *e, const char *id)
 422         {
 423         if(id && (strcmp(id, engine_nuron_id) != 0))
 424                 return 0;
 425         if(!bind_helper(e))
 426                 return 0;
 427         return 1;
 428         }
 429 IMPLEMENT_DYNAMIC_CHECK_FN()
 430 IMPLEMENT_DYNAMIC_BIND_FN(bind_fn)
 431 #endif /* OPENSSL_NO_DYNAMIC_ENGINE */
 432
 433 #endif /* !OPENSSL_NO_HW_NURON */
 434 #endif /* !OPENSSL_NO_HW */