1/* crypto/engine/hw_atalla.c */ 2/* Written by Geoff Thorpe (geoff@geoffthorpe.net) for the OpenSSL 3 * project 2000. 4 */ 5/* ==================================================================== 6 * Copyright (c) 1999-2001 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#ifndef OPENSSL_NO_HW 66#ifndef OPENSSL_NO_HW_ATALLA 67 68#ifdef FLAT_INC 69#include "atalla.h" 70#else 71#include "vendor_defns/atalla.h" 72#endif 73 74#define ATALLA_LIB_NAME "atalla engine" 75#include "hw_atalla_err.c" 76 77static int atalla_destroy(ENGINE *e); 78static int atalla_init(ENGINE *e); 79static int atalla_finish(ENGINE *e); 80static int atalla_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f)()); 81 82/* BIGNUM stuff */ 83static int atalla_mod_exp(BIGNUM *r, const BIGNUM *a, const BIGNUM *p, 84 const BIGNUM *m, BN_CTX *ctx); 85 86#ifndef OPENSSL_NO_RSA 87/* RSA stuff */ 88static int atalla_rsa_mod_exp(BIGNUM *r0, const BIGNUM *I, RSA *rsa); 89#endif 90/* This function is aliased to mod_exp (with the mont stuff dropped). */ 91static int atalla_mod_exp_mont(BIGNUM *r, const BIGNUM *a, const BIGNUM *p, 92 const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx); 93 94#ifndef OPENSSL_NO_DSA 95/* DSA stuff */ 96static int atalla_dsa_mod_exp(DSA *dsa, BIGNUM *rr, BIGNUM *a1, 97 BIGNUM *p1, BIGNUM *a2, BIGNUM *p2, BIGNUM *m, 98 BN_CTX *ctx, BN_MONT_CTX *in_mont); 99static int atalla_mod_exp_dsa(DSA *dsa, BIGNUM *r, BIGNUM *a, 100 const BIGNUM *p, const BIGNUM *m, BN_CTX *ctx, 101 BN_MONT_CTX *m_ctx); 102#endif 103 104#ifndef OPENSSL_NO_DH 105/* DH stuff */ 106/* This function is alised to mod_exp (with the DH and mont dropped). */ 107static int atalla_mod_exp_dh(const DH *dh, BIGNUM *r, 108 const BIGNUM *a, const BIGNUM *p, 109 const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx); 110#endif 111 112/* The definitions for control commands specific to this engine */ 113#define ATALLA_CMD_SO_PATH ENGINE_CMD_BASE 114static const ENGINE_CMD_DEFN atalla_cmd_defns[] = { 115 {ATALLA_CMD_SO_PATH, 116 "SO_PATH", 117 "Specifies the path to the 'atasi' shared library", 118 ENGINE_CMD_FLAG_STRING}, 119 {0, NULL, NULL, 0} 120 }; 121 122#ifndef OPENSSL_NO_RSA 123/* Our internal RSA_METHOD that we provide pointers to */ 124static RSA_METHOD atalla_rsa = 125 { 126 "Atalla RSA method", 127 NULL, 128 NULL, 129 NULL, 130 NULL, 131 atalla_rsa_mod_exp, 132 atalla_mod_exp_mont, 133 NULL, 134 NULL, 135 0, 136 NULL, 137 NULL, 138 NULL 139 }; 140#endif 141 142#ifndef OPENSSL_NO_DSA 143/* Our internal DSA_METHOD that we provide pointers to */ 144static DSA_METHOD atalla_dsa = 145 { 146 "Atalla DSA method", 147 NULL, /* dsa_do_sign */ 148 NULL, /* dsa_sign_setup */ 149 NULL, /* dsa_do_verify */ 150 atalla_dsa_mod_exp, /* dsa_mod_exp */ 151 atalla_mod_exp_dsa, /* bn_mod_exp */ 152 NULL, /* init */ 153 NULL, /* finish */ 154 0, /* flags */ 155 NULL /* app_data */ 156 }; 157#endif 158 159#ifndef OPENSSL_NO_DH 160/* Our internal DH_METHOD that we provide pointers to */ 161static DH_METHOD atalla_dh = 162 { 163 "Atalla DH method", 164 NULL, 165 NULL, 166 atalla_mod_exp_dh, 167 NULL, 168 NULL, 169 0, 170 NULL 171 }; 172#endif 173 174/* Constants used when creating the ENGINE */ 175static const char *engine_atalla_id = "atalla"; 176static const char *engine_atalla_name = "Atalla hardware engine support"; 177 178/* This internal function is used by ENGINE_atalla() and possibly by the 179 * "dynamic" ENGINE support too */ 180static int bind_helper(ENGINE *e) 181 { 182#ifndef OPENSSL_NO_RSA 183 const RSA_METHOD *meth1; 184#endif 185#ifndef OPENSSL_NO_DSA 186 const DSA_METHOD *meth2; 187#endif 188#ifndef OPENSSL_NO_DH 189 const DH_METHOD *meth3; 190#endif 191 if(!ENGINE_set_id(e, engine_atalla_id) || 192 !ENGINE_set_name(e, engine_atalla_name) || 193#ifndef OPENSSL_NO_RSA 194 !ENGINE_set_RSA(e, &atalla_rsa) || 195#endif 196#ifndef OPENSSL_NO_DSA 197 !ENGINE_set_DSA(e, &atalla_dsa) || 198#endif 199#ifndef OPENSSL_NO_DH 200 !ENGINE_set_DH(e, &atalla_dh) || 201#endif 202 !ENGINE_set_destroy_function(e, atalla_destroy) || 203 !ENGINE_set_init_function(e, atalla_init) || 204 !ENGINE_set_finish_function(e, atalla_finish) || 205 !ENGINE_set_ctrl_function(e, atalla_ctrl) || 206 !ENGINE_set_cmd_defns(e, atalla_cmd_defns)) 207 return 0; 208 209#ifndef OPENSSL_NO_RSA 210 /* We know that the "PKCS1_SSLeay()" functions hook properly 211 * to the atalla-specific mod_exp and mod_exp_crt so we use 212 * those functions. NB: We don't use ENGINE_openssl() or 213 * anything "more generic" because something like the RSAref 214 * code may not hook properly, and if you own one of these 215 * cards then you have the right to do RSA operations on it 216 * anyway! */ 217 meth1 = RSA_PKCS1_SSLeay(); 218 atalla_rsa.rsa_pub_enc = meth1->rsa_pub_enc; 219 atalla_rsa.rsa_pub_dec = meth1->rsa_pub_dec; 220 atalla_rsa.rsa_priv_enc = meth1->rsa_priv_enc; 221 atalla_rsa.rsa_priv_dec = meth1->rsa_priv_dec; 222#endif 223 224#ifndef OPENSSL_NO_DSA 225 /* Use the DSA_OpenSSL() method and just hook the mod_exp-ish 226 * bits. */ 227 meth2 = DSA_OpenSSL(); 228 atalla_dsa.dsa_do_sign = meth2->dsa_do_sign; 229 atalla_dsa.dsa_sign_setup = meth2->dsa_sign_setup; 230 atalla_dsa.dsa_do_verify = meth2->dsa_do_verify; 231#endif 232 233#ifndef OPENSSL_NO_DH 234 /* Much the same for Diffie-Hellman */ 235 meth3 = DH_OpenSSL(); 236 atalla_dh.generate_key = meth3->generate_key; 237 atalla_dh.compute_key = meth3->compute_key; 238#endif 239 240 /* Ensure the atalla error handling is set up */ 241 ERR_load_ATALLA_strings(); 242 return 1; 243 } 244 245#ifndef ENGINE_DYNAMIC_SUPPORT 246static ENGINE *engine_atalla(void) 247 { 248 ENGINE *ret = ENGINE_new(); 249 if(!ret) 250 return NULL; 251 if(!bind_helper(ret)) 252 { 253 ENGINE_free(ret); 254 return NULL; 255 } 256 return ret; 257 } 258 259void ENGINE_load_atalla(void) 260 { 261 /* Copied from eng_[openssl|dyn].c */ 262 ENGINE *toadd = engine_atalla(); 263 if(!toadd) return; 264 ENGINE_add(toadd); 265 ENGINE_free(toadd); 266 ERR_clear_error(); 267 } 268#endif 269 270/* This is a process-global DSO handle used for loading and unloading 271 * the Atalla library. NB: This is only set (or unset) during an 272 * init() or finish() call (reference counts permitting) and they're 273 * operating with global locks, so this should be thread-safe 274 * implicitly. */ 275static DSO *atalla_dso = NULL; 276 277/* These are the function pointers that are (un)set when the library has 278 * successfully (un)loaded. */ 279static tfnASI_GetHardwareConfig *p_Atalla_GetHardwareConfig = NULL; 280static tfnASI_RSAPrivateKeyOpFn *p_Atalla_RSAPrivateKeyOpFn = NULL; 281static tfnASI_GetPerformanceStatistics *p_Atalla_GetPerformanceStatistics = NULL; 282 283/* These are the static string constants for the DSO file name and the function 284 * symbol names to bind to. Regrettably, the DSO name on *nix appears to be 285 * "atasi.so" rather than something more consistent like "libatasi.so". At the 286 * time of writing, I'm not sure what the file name on win32 is but clearly 287 * native name translation is not possible (eg libatasi.so on *nix, and 288 * atasi.dll on win32). For the purposes of testing, I have created a symbollic 289 * link called "libatasi.so" so that we can use native name-translation - a 290 * better solution will be needed. */ 291static const char *ATALLA_LIBNAME = NULL; 292static const char *get_ATALLA_LIBNAME(void) 293 { 294 if(ATALLA_LIBNAME) 295 return ATALLA_LIBNAME; 296 return "atasi"; 297 } 298static void free_ATALLA_LIBNAME(void) 299 { 300 if(ATALLA_LIBNAME) 301 OPENSSL_free((void*)ATALLA_LIBNAME); 302 ATALLA_LIBNAME = NULL; 303 } 304static long set_ATALLA_LIBNAME(const char *name) 305 { 306 free_ATALLA_LIBNAME(); 307 return (((ATALLA_LIBNAME = BUF_strdup(name)) != NULL) ? 1 : 0); 308 } 309static const char *ATALLA_F1 = "ASI_GetHardwareConfig"; 310static const char *ATALLA_F2 = "ASI_RSAPrivateKeyOpFn"; 311static const char *ATALLA_F3 = "ASI_GetPerformanceStatistics"; 312 313/* Destructor (complements the "ENGINE_atalla()" constructor) */ 314static int atalla_destroy(ENGINE *e) 315 { 316 free_ATALLA_LIBNAME(); 317 /* Unload the atalla error strings so any error state including our 318 * functs or reasons won't lead to a segfault (they simply get displayed 319 * without corresponding string data because none will be found). */ 320 ERR_unload_ATALLA_strings(); 321 return 1; 322 } 323 324/* (de)initialisation functions. */ 325static int atalla_init(ENGINE *e) 326 { 327 tfnASI_GetHardwareConfig *p1; 328 tfnASI_RSAPrivateKeyOpFn *p2; 329 tfnASI_GetPerformanceStatistics *p3; 330 /* Not sure of the origin of this magic value, but Ben's code had it 331 * and it seemed to have been working for a few people. :-) */ 332 unsigned int config_buf[1024]; 333 334 if(atalla_dso != NULL) 335 { 336 ATALLAerr(ATALLA_F_ATALLA_INIT,ATALLA_R_ALREADY_LOADED); 337 goto err; 338 } 339 /* Attempt to load libatasi.so/atasi.dll/whatever. Needs to be 340 * changed unfortunately because the Atalla drivers don't have 341 * standard library names that can be platform-translated well. */ 342 /* TODO: Work out how to actually map to the names the Atalla 343 * drivers really use - for now a symbollic link needs to be 344 * created on the host system from libatasi.so to atasi.so on 345 * unix variants. */ 346 atalla_dso = DSO_load(NULL, get_ATALLA_LIBNAME(), NULL, 0); 347 if(atalla_dso == NULL) 348 { 349 ATALLAerr(ATALLA_F_ATALLA_INIT,ATALLA_R_NOT_LOADED); 350 goto err; 351 } 352 if(!(p1 = (tfnASI_GetHardwareConfig *)DSO_bind_func( 353 atalla_dso, ATALLA_F1)) || 354 !(p2 = (tfnASI_RSAPrivateKeyOpFn *)DSO_bind_func( 355 atalla_dso, ATALLA_F2)) || 356 !(p3 = (tfnASI_GetPerformanceStatistics *)DSO_bind_func( 357 atalla_dso, ATALLA_F3))) 358 { 359 ATALLAerr(ATALLA_F_ATALLA_INIT,ATALLA_R_NOT_LOADED); 360 goto err; 361 } 362 /* Copy the pointers */ 363 p_Atalla_GetHardwareConfig = p1; 364 p_Atalla_RSAPrivateKeyOpFn = p2; 365 p_Atalla_GetPerformanceStatistics = p3; 366 /* Perform a basic test to see if there's actually any unit 367 * running. */ 368 if(p1(0L, config_buf) != 0) 369 { 370 ATALLAerr(ATALLA_F_ATALLA_INIT,ATALLA_R_UNIT_FAILURE); 371 goto err; 372 } 373 /* Everything's fine. */ 374 return 1; 375err: 376 if(atalla_dso) 377 DSO_free(atalla_dso); 378 p_Atalla_GetHardwareConfig = NULL; 379 p_Atalla_RSAPrivateKeyOpFn = NULL; 380 p_Atalla_GetPerformanceStatistics = NULL; 381 return 0; 382 } 383 384static int atalla_finish(ENGINE *e) 385 { 386 free_ATALLA_LIBNAME(); 387 if(atalla_dso == NULL) 388 { 389 ATALLAerr(ATALLA_F_ATALLA_FINISH,ATALLA_R_NOT_LOADED); 390 return 0; 391 } 392 if(!DSO_free(atalla_dso)) 393 { 394 ATALLAerr(ATALLA_F_ATALLA_FINISH,ATALLA_R_UNIT_FAILURE); 395 return 0; 396 } 397 atalla_dso = NULL; 398 p_Atalla_GetHardwareConfig = NULL; 399 p_Atalla_RSAPrivateKeyOpFn = NULL; 400 p_Atalla_GetPerformanceStatistics = NULL; 401 return 1; 402 } 403 404static int atalla_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f)()) 405 { 406 int initialised = ((atalla_dso == NULL) ? 0 : 1); 407 switch(cmd) 408 { 409 case ATALLA_CMD_SO_PATH: 410 if(p == NULL) 411 { 412 ATALLAerr(ATALLA_F_ATALLA_CTRL,ERR_R_PASSED_NULL_PARAMETER); 413 return 0; 414 } 415 if(initialised) 416 { 417 ATALLAerr(ATALLA_F_ATALLA_CTRL,ATALLA_R_ALREADY_LOADED); 418 return 0; 419 } 420 return set_ATALLA_LIBNAME((const char *)p); 421 default: 422 break; 423 } 424 ATALLAerr(ATALLA_F_ATALLA_CTRL,ATALLA_R_CTRL_COMMAND_NOT_IMPLEMENTED); 425 return 0; 426 } 427 428static int atalla_mod_exp(BIGNUM *r, const BIGNUM *a, const BIGNUM *p, 429 const BIGNUM *m, BN_CTX *ctx) 430 { 431 /* I need somewhere to store temporary serialised values for 432 * use with the Atalla API calls. A neat cheat - I'll use 433 * BIGNUMs from the BN_CTX but access their arrays directly as 434 * byte arrays <grin>. This way I don't have to clean anything 435 * up. */ 436 BIGNUM *modulus; 437 BIGNUM *exponent; 438 BIGNUM *argument; 439 BIGNUM *result; 440 RSAPrivateKey keydata; 441 int to_return, numbytes; 442 443 modulus = exponent = argument = result = NULL; 444 to_return = 0; /* expect failure */ 445 446 if(!atalla_dso) 447 { 448 ATALLAerr(ATALLA_F_ATALLA_MOD_EXP,ATALLA_R_NOT_LOADED); 449 goto err; 450 } 451 /* Prepare the params */ 452 BN_CTX_start(ctx); 453 modulus = BN_CTX_get(ctx); 454 exponent = BN_CTX_get(ctx); 455 argument = BN_CTX_get(ctx); 456 result = BN_CTX_get(ctx); 457 if (!result) 458 { 459 ATALLAerr(ATALLA_F_ATALLA_MOD_EXP,ATALLA_R_BN_CTX_FULL); 460 goto err; 461 } 462 if(!bn_wexpand(modulus, m->top) || !bn_wexpand(exponent, m->top) || 463 !bn_wexpand(argument, m->top) || !bn_wexpand(result, m->top)) 464 { 465 ATALLAerr(ATALLA_F_ATALLA_MOD_EXP,ATALLA_R_BN_EXPAND_FAIL); 466 goto err; 467 } 468 /* Prepare the key-data */ 469 memset(&keydata, 0,sizeof keydata); 470 numbytes = BN_num_bytes(m); 471 memset(exponent->d, 0, numbytes); 472 memset(modulus->d, 0, numbytes); 473 BN_bn2bin(p, (unsigned char *)exponent->d + numbytes - BN_num_bytes(p)); 474 BN_bn2bin(m, (unsigned char *)modulus->d + numbytes - BN_num_bytes(m)); 475 keydata.privateExponent.data = (unsigned char *)exponent->d; 476 keydata.privateExponent.len = numbytes; 477 keydata.modulus.data = (unsigned char *)modulus->d; 478 keydata.modulus.len = numbytes; 479 /* Prepare the argument */ 480 memset(argument->d, 0, numbytes); 481 memset(result->d, 0, numbytes); 482 BN_bn2bin(a, (unsigned char *)argument->d + numbytes - BN_num_bytes(a)); 483 /* Perform the operation */ 484 if(p_Atalla_RSAPrivateKeyOpFn(&keydata, (unsigned char *)result->d, 485 (unsigned char *)argument->d, 486 keydata.modulus.len) != 0) 487 { 488 ATALLAerr(ATALLA_F_ATALLA_MOD_EXP,ATALLA_R_REQUEST_FAILED); 489 goto err; 490 } 491 /* Convert the response */ 492 BN_bin2bn((unsigned char *)result->d, numbytes, r); 493 to_return = 1; 494err: 495 BN_CTX_end(ctx); 496 return to_return; 497 } 498 499#ifndef OPENSSL_NO_RSA 500static int atalla_rsa_mod_exp(BIGNUM *r0, const BIGNUM *I, RSA *rsa) 501 { 502 BN_CTX *ctx = NULL; 503 int to_return = 0; 504 505 if(!atalla_dso) 506 { 507 ATALLAerr(ATALLA_F_ATALLA_RSA_MOD_EXP,ATALLA_R_NOT_LOADED); 508 goto err; 509 } 510 if((ctx = BN_CTX_new()) == NULL) 511 goto err; 512 if(!rsa->d || !rsa->n) 513 { 514 ATALLAerr(ATALLA_F_ATALLA_RSA_MOD_EXP,ATALLA_R_MISSING_KEY_COMPONENTS); 515 goto err; 516 } 517 to_return = atalla_mod_exp(r0, I, rsa->d, rsa->n, ctx); 518err: 519 if(ctx) 520 BN_CTX_free(ctx); 521 return to_return; 522 } 523#endif 524 525#ifndef OPENSSL_NO_DSA 526/* This code was liberated and adapted from the commented-out code in 527 * dsa_ossl.c. Because of the unoptimised form of the Atalla acceleration 528 * (it doesn't have a CRT form for RSA), this function means that an 529 * Atalla system running with a DSA server certificate can handshake 530 * around 5 or 6 times faster/more than an equivalent system running with 531 * RSA. Just check out the "signs" statistics from the RSA and DSA parts 532 * of "openssl speed -engine atalla dsa1024 rsa1024". */ 533static int atalla_dsa_mod_exp(DSA *dsa, BIGNUM *rr, BIGNUM *a1, 534 BIGNUM *p1, BIGNUM *a2, BIGNUM *p2, BIGNUM *m, 535 BN_CTX *ctx, BN_MONT_CTX *in_mont) 536 { 537 BIGNUM t; 538 int to_return = 0; 539 540 BN_init(&t); 541 /* let rr = a1 ^ p1 mod m */ 542 if (!atalla_mod_exp(rr,a1,p1,m,ctx)) goto end; 543 /* let t = a2 ^ p2 mod m */ 544 if (!atalla_mod_exp(&t,a2,p2,m,ctx)) goto end; 545 /* let rr = rr * t mod m */ 546 if (!BN_mod_mul(rr,rr,&t,m,ctx)) goto end; 547 to_return = 1; 548end: 549 BN_free(&t); 550 return to_return; 551 } 552 553static int atalla_mod_exp_dsa(DSA *dsa, BIGNUM *r, BIGNUM *a, 554 const BIGNUM *p, const BIGNUM *m, BN_CTX *ctx, 555 BN_MONT_CTX *m_ctx) 556 { 557 return atalla_mod_exp(r, a, p, m, ctx); 558 } 559#endif 560 561/* This function is aliased to mod_exp (with the mont stuff dropped). */ 562static int atalla_mod_exp_mont(BIGNUM *r, const BIGNUM *a, const BIGNUM *p, 563 const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx) 564 { 565 return atalla_mod_exp(r, a, p, m, ctx); 566 } 567 568#ifndef OPENSSL_NO_DH 569/* This function is aliased to mod_exp (with the dh and mont dropped). */ 570static int atalla_mod_exp_dh(const DH *dh, BIGNUM *r, 571 const BIGNUM *a, const BIGNUM *p, 572 const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx) 573 { 574 return atalla_mod_exp(r, a, p, m, ctx); 575 } 576#endif 577 578/* This stuff is needed if this ENGINE is being compiled into a self-contained 579 * shared-library. */ 580#ifdef ENGINE_DYNAMIC_SUPPORT 581static int bind_fn(ENGINE *e, const char *id) 582 { 583 if(id && (strcmp(id, engine_atalla_id) != 0)) 584 return 0; 585 if(!bind_helper(e)) 586 return 0; 587 return 1; 588 } 589IMPLEMENT_DYNAMIC_CHECK_FN() 590IMPLEMENT_DYNAMIC_BIND_FN(bind_fn) 591#endif /* ENGINE_DYNAMIC_SUPPORT */ 592 593#endif /* !OPENSSL_NO_HW_ATALLA */ 594#endif /* !OPENSSL_NO_HW */ 595