crypto/openssl-0.9.7d/crypto/engine/hw_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 <openssl/crypto.h>
  61 #include "cryptlib.h"
  62 #include <openssl/dso.h>
  63 #include <openssl/engine.h>
  64
  65
  66 #ifndef OPENSSL_NO_HW
  67 #ifndef OPENSSL_NO_HW_NURON
  68
  69 #define NURON_LIB_NAME "nuron engine"
  70 #include "hw_nuron_err.c"
  71
  72 static const char *NURON_LIBNAME = NULL;
  73 static const char *get_NURON_LIBNAME(void)
  74         {
  75         if(NURON_LIBNAME)
  76                 return NURON_LIBNAME;
  77         return "nuronssl";
  78         }
  79 static void free_NURON_LIBNAME(void)
  80         {
  81         if(NURON_LIBNAME)
  82                 OPENSSL_free((void*)NURON_LIBNAME);
  83         NURON_LIBNAME = NULL;
  84         }
  85 static long set_NURON_LIBNAME(const char *name)
  86         {
  87         free_NURON_LIBNAME();
  88         return (((NURON_LIBNAME = BUF_strdup(name)) != NULL) ? 1 : 0);
  89         }
  90 static const char *NURON_F1 = "nuron_mod_exp";
  91
  92 /* The definitions for control commands specific to this engine */
  93 #define NURON_CMD_SO_PATH               ENGINE_CMD_BASE
  94 static const ENGINE_CMD_DEFN nuron_cmd_defns[] = {
  95         {NURON_CMD_SO_PATH,
  96                 "SO_PATH",
  97                 "Specifies the path to the 'nuronssl' shared library",
  98                 ENGINE_CMD_FLAG_STRING},
  99         {0, NULL, NULL, 0}
 100         };
 101
 102 typedef int tfnModExp(BIGNUM *r,const BIGNUM *a,const BIGNUM *p,const BIGNUM *m);
 103 static tfnModExp *pfnModExp = NULL;
 104
 105 static DSO *pvDSOHandle = NULL;
 106
 107 static int nuron_destroy(ENGINE *e)
 108         {
 109         free_NURON_LIBNAME();
 110         ERR_unload_NURON_strings();
 111         return 1;
 112         }
 113
 114 static int nuron_init(ENGINE *e)
 115         {
 116         if(pvDSOHandle != NULL)
 117                 {
 118                 NURONerr(NURON_F_NURON_INIT,NURON_R_ALREADY_LOADED);
 119                 return 0;
 120                 }
 121
 122         pvDSOHandle = DSO_load(NULL, get_NURON_LIBNAME(), NULL,
 123                 DSO_FLAG_NAME_TRANSLATION_EXT_ONLY);
 124         if(!pvDSOHandle)
 125                 {
 126                 NURONerr(NURON_F_NURON_INIT,NURON_R_DSO_NOT_FOUND);
 127                 return 0;
 128                 }
 129
 130         pfnModExp = (tfnModExp *)DSO_bind_func(pvDSOHandle, NURON_F1);
 131         if(!pfnModExp)
 132                 {
 133                 NURONerr(NURON_F_NURON_INIT,NURON_R_DSO_FUNCTION_NOT_FOUND);
 134                 return 0;
 135                 }
 136
 137         return 1;
 138         }
 139
 140 static int nuron_finish(ENGINE *e)
 141         {
 142         free_NURON_LIBNAME();
 143         if(pvDSOHandle == NULL)
 144                 {
 145                 NURONerr(NURON_F_NURON_FINISH,NURON_R_NOT_LOADED);
 146                 return 0;
 147                 }
 148         if(!DSO_free(pvDSOHandle))
 149                 {
 150                 NURONerr(NURON_F_NURON_FINISH,NURON_R_DSO_FAILURE);
 151                 return 0;
 152                 }
 153         pvDSOHandle=NULL;
 154         pfnModExp=NULL;
 155         return 1;
 156         }
 157
 158 static int nuron_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f)())
 159         {
 160         int initialised = ((pvDSOHandle == NULL) ? 0 : 1);
 161         switch(cmd)
 162                 {
 163         case NURON_CMD_SO_PATH:
 164                 if(p == NULL)
 165                         {
 166                         NURONerr(NURON_F_NURON_CTRL,ERR_R_PASSED_NULL_PARAMETER);
 167                         return 0;
 168                         }
 169                 if(initialised)
 170                         {
 171                         NURONerr(NURON_F_NURON_CTRL,NURON_R_ALREADY_LOADED);
 172                         return 0;
 173                         }
 174                 return set_NURON_LIBNAME((const char *)p);
 175         default:
 176                 break;
 177                 }
 178         NURONerr(NURON_F_NURON_CTRL,NURON_R_CTRL_COMMAND_NOT_IMPLEMENTED);
 179         return 0;
 180 }
 181
 182 static int nuron_mod_exp(BIGNUM *r,const BIGNUM *a,const BIGNUM *p,
 183                          const BIGNUM *m,BN_CTX *ctx)
 184         {
 185         if(!pvDSOHandle)
 186                 {
 187                 NURONerr(NURON_F_NURON_MOD_EXP,NURON_R_NOT_LOADED);
 188                 return 0;
 189                 }
 190         return pfnModExp(r,a,p,m);
 191         }
 192
 193 #ifndef OPENSSL_NO_RSA
 194 static int nuron_rsa_mod_exp(BIGNUM *r0, const BIGNUM *I, RSA *rsa)
 195         {
 196         return nuron_mod_exp(r0,I,rsa->d,rsa->n,NULL);
 197         }
 198 #endif
 199
 200 #ifndef OPENSSL_NO_DSA
 201 /* This code was liberated and adapted from the commented-out code in
 202  * dsa_ossl.c. Because of the unoptimised form of the Atalla acceleration
 203  * (it doesn't have a CRT form for RSA), this function means that an
 204  * Atalla system running with a DSA server certificate can handshake
 205  * around 5 or 6 times faster/more than an equivalent system running with
 206  * RSA. Just check out the "signs" statistics from the RSA and DSA parts
 207  * of "openssl speed -engine atalla dsa1024 rsa1024". */
 208 static int nuron_dsa_mod_exp(DSA *dsa, BIGNUM *rr, BIGNUM *a1,
 209                              BIGNUM *p1, BIGNUM *a2, BIGNUM *p2, BIGNUM *m,
 210                              BN_CTX *ctx, BN_MONT_CTX *in_mont)
 211         {
 212         BIGNUM t;
 213         int to_return = 0;
 214
 215         BN_init(&t);
 216         /* let rr = a1 ^ p1 mod m */
 217         if (!nuron_mod_exp(rr,a1,p1,m,ctx))
 218                 goto end;
 219         /* let t = a2 ^ p2 mod m */
 220         if (!nuron_mod_exp(&t,a2,p2,m,ctx))
 221                 goto end;
 222         /* let rr = rr * t mod m */
 223         if (!BN_mod_mul(rr,rr,&t,m,ctx))
 224                 goto end;
 225         to_return = 1;
 226 end:
 227         BN_free(&t);
 228         return to_return;
 229         }
 230
 231
 232 static int nuron_mod_exp_dsa(DSA *dsa, BIGNUM *r, BIGNUM *a,
 233                              const BIGNUM *p, const BIGNUM *m, BN_CTX *ctx,
 234                              BN_MONT_CTX *m_ctx)
 235         {
 236         return nuron_mod_exp(r, a, p, m, ctx);
 237         }
 238 #endif
 239
 240 /* This function is aliased to mod_exp (with the mont stuff dropped). */
 241 static int nuron_mod_exp_mont(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
 242                               const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx)
 243         {
 244         return nuron_mod_exp(r, a, p, m, ctx);
 245         }
 246
 247 #ifndef OPENSSL_NO_DH
 248 /* This function is aliased to mod_exp (with the dh and mont dropped). */
 249 static int nuron_mod_exp_dh(const DH *dh, BIGNUM *r,
 250                 const BIGNUM *a, const BIGNUM *p,
 251                 const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx)
 252         {
 253         return nuron_mod_exp(r, a, p, m, ctx);
 254         }
 255 #endif
 256
 257 #ifndef OPENSSL_NO_RSA
 258 static RSA_METHOD nuron_rsa =
 259         {
 260         "Nuron RSA method",
 261         NULL,
 262         NULL,
 263         NULL,
 264         NULL,
 265         nuron_rsa_mod_exp,
 266         nuron_mod_exp_mont,
 267         NULL,
 268         NULL,
 269         0,
 270         NULL,
 271         NULL,
 272         NULL
 273         };
 274 #endif
 275
 276 #ifndef OPENSSL_NO_DSA
 277 static DSA_METHOD nuron_dsa =
 278         {
 279         "Nuron DSA method",
 280         NULL, /* dsa_do_sign */
 281         NULL, /* dsa_sign_setup */
 282         NULL, /* dsa_do_verify */
 283         nuron_dsa_mod_exp, /* dsa_mod_exp */
 284         nuron_mod_exp_dsa, /* bn_mod_exp */
 285         NULL, /* init */
 286         NULL, /* finish */
 287         0, /* flags */
 288         NULL /* app_data */
 289         };
 290 #endif
 291
 292 #ifndef OPENSSL_NO_DH
 293 static DH_METHOD nuron_dh =
 294         {
 295         "Nuron DH method",
 296         NULL,
 297         NULL,
 298         nuron_mod_exp_dh,
 299         NULL,
 300         NULL,
 301         0,
 302         NULL
 303         };
 304 #endif
 305
 306 /* Constants used when creating the ENGINE */
 307 static const char *engine_nuron_id = "nuron";
 308 static const char *engine_nuron_name = "Nuron hardware engine support";
 309
 310 /* This internal function is used by ENGINE_nuron() and possibly by the
 311  * "dynamic" ENGINE support too */
 312 static int bind_helper(ENGINE *e)
 313         {
 314 #ifndef OPENSSL_NO_RSA
 315         const RSA_METHOD *meth1;
 316 #endif
 317 #ifndef OPENSSL_NO_DSA
 318         const DSA_METHOD *meth2;
 319 #endif
 320 #ifndef OPENSSL_NO_DH
 321         const DH_METHOD *meth3;
 322 #endif
 323         if(!ENGINE_set_id(e, engine_nuron_id) ||
 324                         !ENGINE_set_name(e, engine_nuron_name) ||
 325 #ifndef OPENSSL_NO_RSA
 326                         !ENGINE_set_RSA(e, &nuron_rsa) ||
 327 #endif
 328 #ifndef OPENSSL_NO_DSA
 329                         !ENGINE_set_DSA(e, &nuron_dsa) ||
 330 #endif
 331 #ifndef OPENSSL_NO_DH
 332                         !ENGINE_set_DH(e, &nuron_dh) ||
 333 #endif
 334                         !ENGINE_set_destroy_function(e, nuron_destroy) ||
 335                         !ENGINE_set_init_function(e, nuron_init) ||
 336                         !ENGINE_set_finish_function(e, nuron_finish) ||
 337                         !ENGINE_set_ctrl_function(e, nuron_ctrl) ||
 338                         !ENGINE_set_cmd_defns(e, nuron_cmd_defns))
 339                 return 0;
 340
 341 #ifndef OPENSSL_NO_RSA
 342         /* We know that the "PKCS1_SSLeay()" functions hook properly
 343          * to the nuron-specific mod_exp and mod_exp_crt so we use
 344          * those functions. NB: We don't use ENGINE_openssl() or
 345          * anything "more generic" because something like the RSAref
 346          * code may not hook properly, and if you own one of these
 347          * cards then you have the right to do RSA operations on it
 348          * anyway! */
 349         meth1=RSA_PKCS1_SSLeay();
 350         nuron_rsa.rsa_pub_enc=meth1->rsa_pub_enc;
 351         nuron_rsa.rsa_pub_dec=meth1->rsa_pub_dec;
 352         nuron_rsa.rsa_priv_enc=meth1->rsa_priv_enc;
 353         nuron_rsa.rsa_priv_dec=meth1->rsa_priv_dec;
 354 #endif
 355
 356 #ifndef OPENSSL_NO_DSA
 357         /* Use the DSA_OpenSSL() method and just hook the mod_exp-ish
 358          * bits. */
 359         meth2=DSA_OpenSSL();
 360         nuron_dsa.dsa_do_sign=meth2->dsa_do_sign;
 361         nuron_dsa.dsa_sign_setup=meth2->dsa_sign_setup;
 362         nuron_dsa.dsa_do_verify=meth2->dsa_do_verify;
 363 #endif
 364
 365 #ifndef OPENSSL_NO_DH
 366         /* Much the same for Diffie-Hellman */
 367         meth3=DH_OpenSSL();
 368         nuron_dh.generate_key=meth3->generate_key;
 369         nuron_dh.compute_key=meth3->compute_key;
 370 #endif
 371
 372         /* Ensure the nuron error handling is set up */
 373         ERR_load_NURON_strings();
 374         return 1;
 375         }
 376
 377 #ifndef ENGINE_DYNAMIC_SUPPORT
 378 static ENGINE *engine_nuron(void)
 379         {
 380         ENGINE *ret = ENGINE_new();
 381         if(!ret)
 382                 return NULL;
 383         if(!bind_helper(ret))
 384                 {
 385                 ENGINE_free(ret);
 386                 return NULL;
 387                 }
 388         return ret;
 389         }
 390
 391 void ENGINE_load_nuron(void)
 392         {
 393         /* Copied from eng_[openssl|dyn].c */
 394         ENGINE *toadd = engine_nuron();
 395         if(!toadd) return;
 396         ENGINE_add(toadd);
 397         ENGINE_free(toadd);
 398         ERR_clear_error();
 399         }
 400 #endif
 401
 402 /* This stuff is needed if this ENGINE is being compiled into a self-contained
 403  * shared-library. */
 404 #ifdef ENGINE_DYNAMIC_SUPPORT
 405 static int bind_fn(ENGINE *e, const char *id)
 406         {
 407         if(id && (strcmp(id, engine_nuron_id) != 0))
 408                 return 0;
 409         if(!bind_helper(e))
 410                 return 0;
 411         return 1;
 412         }
 413 IMPLEMENT_DYNAMIC_CHECK_FN()
 414 IMPLEMENT_DYNAMIC_BIND_FN(bind_fn)
 415 #endif /* ENGINE_DYNAMIC_SUPPORT */
 416
 417 #endif /* !OPENSSL_NO_HW_NURON */
 418 #endif /* !OPENSSL_NO_HW */