e_atalla.c revision 160814
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 <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_ATALLA 78 79#ifdef FLAT_INC 80#include "atalla.h" 81#else 82#include "vendor_defns/atalla.h" 83#endif 84 85#define ATALLA_LIB_NAME "atalla engine" 86#include "e_atalla_err.c" 87 88static int atalla_destroy(ENGINE *e); 89static int atalla_init(ENGINE *e); 90static int atalla_finish(ENGINE *e); 91static int atalla_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f)(void)); 92 93/* BIGNUM stuff */ 94static int atalla_mod_exp(BIGNUM *r, const BIGNUM *a, const BIGNUM *p, 95 const BIGNUM *m, BN_CTX *ctx); 96 97#ifndef OPENSSL_NO_RSA 98/* RSA stuff */ 99static int atalla_rsa_mod_exp(BIGNUM *r0, const BIGNUM *I, RSA *rsa, BN_CTX *ctx); 100/* This function is aliased to mod_exp (with the mont stuff dropped). */ 101static int atalla_mod_exp_mont(BIGNUM *r, const BIGNUM *a, const BIGNUM *p, 102 const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx); 103#endif 104 105#ifndef OPENSSL_NO_DSA 106/* DSA stuff */ 107static int atalla_dsa_mod_exp(DSA *dsa, BIGNUM *rr, BIGNUM *a1, 108 BIGNUM *p1, BIGNUM *a2, BIGNUM *p2, BIGNUM *m, 109 BN_CTX *ctx, BN_MONT_CTX *in_mont); 110static int atalla_mod_exp_dsa(DSA *dsa, BIGNUM *r, BIGNUM *a, 111 const BIGNUM *p, const BIGNUM *m, BN_CTX *ctx, 112 BN_MONT_CTX *m_ctx); 113#endif 114 115#ifndef OPENSSL_NO_DH 116/* DH stuff */ 117/* This function is alised to mod_exp (with the DH and mont dropped). */ 118static int atalla_mod_exp_dh(const DH *dh, BIGNUM *r, 119 const BIGNUM *a, const BIGNUM *p, 120 const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx); 121#endif 122 123/* The definitions for control commands specific to this engine */ 124#define ATALLA_CMD_SO_PATH ENGINE_CMD_BASE 125static const ENGINE_CMD_DEFN atalla_cmd_defns[] = { 126 {ATALLA_CMD_SO_PATH, 127 "SO_PATH", 128 "Specifies the path to the 'atasi' shared library", 129 ENGINE_CMD_FLAG_STRING}, 130 {0, NULL, NULL, 0} 131 }; 132 133#ifndef OPENSSL_NO_RSA 134/* Our internal RSA_METHOD that we provide pointers to */ 135static RSA_METHOD atalla_rsa = 136 { 137 "Atalla RSA method", 138 NULL, 139 NULL, 140 NULL, 141 NULL, 142 atalla_rsa_mod_exp, 143 atalla_mod_exp_mont, 144 NULL, 145 NULL, 146 0, 147 NULL, 148 NULL, 149 NULL, 150 NULL 151 }; 152#endif 153 154#ifndef OPENSSL_NO_DSA 155/* Our internal DSA_METHOD that we provide pointers to */ 156static DSA_METHOD atalla_dsa = 157 { 158 "Atalla DSA method", 159 NULL, /* dsa_do_sign */ 160 NULL, /* dsa_sign_setup */ 161 NULL, /* dsa_do_verify */ 162 atalla_dsa_mod_exp, /* dsa_mod_exp */ 163 atalla_mod_exp_dsa, /* bn_mod_exp */ 164 NULL, /* init */ 165 NULL, /* finish */ 166 0, /* flags */ 167 NULL, /* app_data */ 168 NULL, /* dsa_paramgen */ 169 NULL /* dsa_keygen */ 170 }; 171#endif 172 173#ifndef OPENSSL_NO_DH 174/* Our internal DH_METHOD that we provide pointers to */ 175static DH_METHOD atalla_dh = 176 { 177 "Atalla DH method", 178 NULL, 179 NULL, 180 atalla_mod_exp_dh, 181 NULL, 182 NULL, 183 0, 184 NULL, 185 NULL 186 }; 187#endif 188 189/* Constants used when creating the ENGINE */ 190static const char *engine_atalla_id = "atalla"; 191static const char *engine_atalla_name = "Atalla hardware engine support"; 192 193/* This internal function is used by ENGINE_atalla() and possibly by the 194 * "dynamic" ENGINE support too */ 195static int bind_helper(ENGINE *e) 196 { 197#ifndef OPENSSL_NO_RSA 198 const RSA_METHOD *meth1; 199#endif 200#ifndef OPENSSL_NO_DSA 201 const DSA_METHOD *meth2; 202#endif 203#ifndef OPENSSL_NO_DH 204 const DH_METHOD *meth3; 205#endif 206 if(!ENGINE_set_id(e, engine_atalla_id) || 207 !ENGINE_set_name(e, engine_atalla_name) || 208#ifndef OPENSSL_NO_RSA 209 !ENGINE_set_RSA(e, &atalla_rsa) || 210#endif 211#ifndef OPENSSL_NO_DSA 212 !ENGINE_set_DSA(e, &atalla_dsa) || 213#endif 214#ifndef OPENSSL_NO_DH 215 !ENGINE_set_DH(e, &atalla_dh) || 216#endif 217 !ENGINE_set_destroy_function(e, atalla_destroy) || 218 !ENGINE_set_init_function(e, atalla_init) || 219 !ENGINE_set_finish_function(e, atalla_finish) || 220 !ENGINE_set_ctrl_function(e, atalla_ctrl) || 221 !ENGINE_set_cmd_defns(e, atalla_cmd_defns)) 222 return 0; 223 224#ifndef OPENSSL_NO_RSA 225 /* We know that the "PKCS1_SSLeay()" functions hook properly 226 * to the atalla-specific mod_exp and mod_exp_crt so we use 227 * those functions. NB: We don't use ENGINE_openssl() or 228 * anything "more generic" because something like the RSAref 229 * code may not hook properly, and if you own one of these 230 * cards then you have the right to do RSA operations on it 231 * anyway! */ 232 meth1 = RSA_PKCS1_SSLeay(); 233 atalla_rsa.rsa_pub_enc = meth1->rsa_pub_enc; 234 atalla_rsa.rsa_pub_dec = meth1->rsa_pub_dec; 235 atalla_rsa.rsa_priv_enc = meth1->rsa_priv_enc; 236 atalla_rsa.rsa_priv_dec = meth1->rsa_priv_dec; 237#endif 238 239#ifndef OPENSSL_NO_DSA 240 /* Use the DSA_OpenSSL() method and just hook the mod_exp-ish 241 * bits. */ 242 meth2 = DSA_OpenSSL(); 243 atalla_dsa.dsa_do_sign = meth2->dsa_do_sign; 244 atalla_dsa.dsa_sign_setup = meth2->dsa_sign_setup; 245 atalla_dsa.dsa_do_verify = meth2->dsa_do_verify; 246#endif 247 248#ifndef OPENSSL_NO_DH 249 /* Much the same for Diffie-Hellman */ 250 meth3 = DH_OpenSSL(); 251 atalla_dh.generate_key = meth3->generate_key; 252 atalla_dh.compute_key = meth3->compute_key; 253#endif 254 255 /* Ensure the atalla error handling is set up */ 256 ERR_load_ATALLA_strings(); 257 return 1; 258 } 259 260#ifdef OPENSSL_NO_DYNAMIC_ENGINE 261static ENGINE *engine_atalla(void) 262 { 263 ENGINE *ret = ENGINE_new(); 264 if(!ret) 265 return NULL; 266 if(!bind_helper(ret)) 267 { 268 ENGINE_free(ret); 269 return NULL; 270 } 271 return ret; 272 } 273 274void ENGINE_load_atalla(void) 275 { 276 /* Copied from eng_[openssl|dyn].c */ 277 ENGINE *toadd = engine_atalla(); 278 if(!toadd) return; 279 ENGINE_add(toadd); 280 ENGINE_free(toadd); 281 ERR_clear_error(); 282 } 283#endif 284 285/* This is a process-global DSO handle used for loading and unloading 286 * the Atalla library. NB: This is only set (or unset) during an 287 * init() or finish() call (reference counts permitting) and they're 288 * operating with global locks, so this should be thread-safe 289 * implicitly. */ 290static DSO *atalla_dso = NULL; 291 292/* These are the function pointers that are (un)set when the library has 293 * successfully (un)loaded. */ 294static tfnASI_GetHardwareConfig *p_Atalla_GetHardwareConfig = NULL; 295static tfnASI_RSAPrivateKeyOpFn *p_Atalla_RSAPrivateKeyOpFn = NULL; 296static tfnASI_GetPerformanceStatistics *p_Atalla_GetPerformanceStatistics = NULL; 297 298/* These are the static string constants for the DSO file name and the function 299 * symbol names to bind to. Regrettably, the DSO name on *nix appears to be 300 * "atasi.so" rather than something more consistent like "libatasi.so". At the 301 * time of writing, I'm not sure what the file name on win32 is but clearly 302 * native name translation is not possible (eg libatasi.so on *nix, and 303 * atasi.dll on win32). For the purposes of testing, I have created a symbollic 304 * link called "libatasi.so" so that we can use native name-translation - a 305 * better solution will be needed. */ 306static const char *ATALLA_LIBNAME = NULL; 307static const char *get_ATALLA_LIBNAME(void) 308 { 309 if(ATALLA_LIBNAME) 310 return ATALLA_LIBNAME; 311 return "atasi"; 312 } 313static void free_ATALLA_LIBNAME(void) 314 { 315 if(ATALLA_LIBNAME) 316 OPENSSL_free((void*)ATALLA_LIBNAME); 317 ATALLA_LIBNAME = NULL; 318 } 319static long set_ATALLA_LIBNAME(const char *name) 320 { 321 free_ATALLA_LIBNAME(); 322 return (((ATALLA_LIBNAME = BUF_strdup(name)) != NULL) ? 1 : 0); 323 } 324static const char *ATALLA_F1 = "ASI_GetHardwareConfig"; 325static const char *ATALLA_F2 = "ASI_RSAPrivateKeyOpFn"; 326static const char *ATALLA_F3 = "ASI_GetPerformanceStatistics"; 327 328/* Destructor (complements the "ENGINE_atalla()" constructor) */ 329static int atalla_destroy(ENGINE *e) 330 { 331 free_ATALLA_LIBNAME(); 332 /* Unload the atalla error strings so any error state including our 333 * functs or reasons won't lead to a segfault (they simply get displayed 334 * without corresponding string data because none will be found). */ 335 ERR_unload_ATALLA_strings(); 336 return 1; 337 } 338 339/* (de)initialisation functions. */ 340static int atalla_init(ENGINE *e) 341 { 342 tfnASI_GetHardwareConfig *p1; 343 tfnASI_RSAPrivateKeyOpFn *p2; 344 tfnASI_GetPerformanceStatistics *p3; 345 /* Not sure of the origin of this magic value, but Ben's code had it 346 * and it seemed to have been working for a few people. :-) */ 347 unsigned int config_buf[1024]; 348 349 if(atalla_dso != NULL) 350 { 351 ATALLAerr(ATALLA_F_ATALLA_INIT,ATALLA_R_ALREADY_LOADED); 352 goto err; 353 } 354 /* Attempt to load libatasi.so/atasi.dll/whatever. Needs to be 355 * changed unfortunately because the Atalla drivers don't have 356 * standard library names that can be platform-translated well. */ 357 /* TODO: Work out how to actually map to the names the Atalla 358 * drivers really use - for now a symbollic link needs to be 359 * created on the host system from libatasi.so to atasi.so on 360 * unix variants. */ 361 atalla_dso = DSO_load(NULL, get_ATALLA_LIBNAME(), NULL, 0); 362 if(atalla_dso == NULL) 363 { 364 ATALLAerr(ATALLA_F_ATALLA_INIT,ATALLA_R_NOT_LOADED); 365 goto err; 366 } 367 if(!(p1 = (tfnASI_GetHardwareConfig *)DSO_bind_func( 368 atalla_dso, ATALLA_F1)) || 369 !(p2 = (tfnASI_RSAPrivateKeyOpFn *)DSO_bind_func( 370 atalla_dso, ATALLA_F2)) || 371 !(p3 = (tfnASI_GetPerformanceStatistics *)DSO_bind_func( 372 atalla_dso, ATALLA_F3))) 373 { 374 ATALLAerr(ATALLA_F_ATALLA_INIT,ATALLA_R_NOT_LOADED); 375 goto err; 376 } 377 /* Copy the pointers */ 378 p_Atalla_GetHardwareConfig = p1; 379 p_Atalla_RSAPrivateKeyOpFn = p2; 380 p_Atalla_GetPerformanceStatistics = p3; 381 /* Perform a basic test to see if there's actually any unit 382 * running. */ 383 if(p1(0L, config_buf) != 0) 384 { 385 ATALLAerr(ATALLA_F_ATALLA_INIT,ATALLA_R_UNIT_FAILURE); 386 goto err; 387 } 388 /* Everything's fine. */ 389 return 1; 390err: 391 if(atalla_dso) 392 DSO_free(atalla_dso); 393 atalla_dso = NULL; 394 p_Atalla_GetHardwareConfig = NULL; 395 p_Atalla_RSAPrivateKeyOpFn = NULL; 396 p_Atalla_GetPerformanceStatistics = NULL; 397 return 0; 398 } 399 400static int atalla_finish(ENGINE *e) 401 { 402 free_ATALLA_LIBNAME(); 403 if(atalla_dso == NULL) 404 { 405 ATALLAerr(ATALLA_F_ATALLA_FINISH,ATALLA_R_NOT_LOADED); 406 return 0; 407 } 408 if(!DSO_free(atalla_dso)) 409 { 410 ATALLAerr(ATALLA_F_ATALLA_FINISH,ATALLA_R_UNIT_FAILURE); 411 return 0; 412 } 413 atalla_dso = NULL; 414 p_Atalla_GetHardwareConfig = NULL; 415 p_Atalla_RSAPrivateKeyOpFn = NULL; 416 p_Atalla_GetPerformanceStatistics = NULL; 417 return 1; 418 } 419 420static int atalla_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f)(void)) 421 { 422 int initialised = ((atalla_dso == NULL) ? 0 : 1); 423 switch(cmd) 424 { 425 case ATALLA_CMD_SO_PATH: 426 if(p == NULL) 427 { 428 ATALLAerr(ATALLA_F_ATALLA_CTRL,ERR_R_PASSED_NULL_PARAMETER); 429 return 0; 430 } 431 if(initialised) 432 { 433 ATALLAerr(ATALLA_F_ATALLA_CTRL,ATALLA_R_ALREADY_LOADED); 434 return 0; 435 } 436 return set_ATALLA_LIBNAME((const char *)p); 437 default: 438 break; 439 } 440 ATALLAerr(ATALLA_F_ATALLA_CTRL,ATALLA_R_CTRL_COMMAND_NOT_IMPLEMENTED); 441 return 0; 442 } 443 444static int atalla_mod_exp(BIGNUM *r, const BIGNUM *a, const BIGNUM *p, 445 const BIGNUM *m, BN_CTX *ctx) 446 { 447 /* I need somewhere to store temporary serialised values for 448 * use with the Atalla API calls. A neat cheat - I'll use 449 * BIGNUMs from the BN_CTX but access their arrays directly as 450 * byte arrays <grin>. This way I don't have to clean anything 451 * up. */ 452 BIGNUM *modulus; 453 BIGNUM *exponent; 454 BIGNUM *argument; 455 BIGNUM *result; 456 RSAPrivateKey keydata; 457 int to_return, numbytes; 458 459 modulus = exponent = argument = result = NULL; 460 to_return = 0; /* expect failure */ 461 462 if(!atalla_dso) 463 { 464 ATALLAerr(ATALLA_F_ATALLA_MOD_EXP,ATALLA_R_NOT_LOADED); 465 goto err; 466 } 467 /* Prepare the params */ 468 BN_CTX_start(ctx); 469 modulus = BN_CTX_get(ctx); 470 exponent = BN_CTX_get(ctx); 471 argument = BN_CTX_get(ctx); 472 result = BN_CTX_get(ctx); 473 if (!result) 474 { 475 ATALLAerr(ATALLA_F_ATALLA_MOD_EXP,ATALLA_R_BN_CTX_FULL); 476 goto err; 477 } 478 if(!bn_wexpand(modulus, m->top) || !bn_wexpand(exponent, m->top) || 479 !bn_wexpand(argument, m->top) || !bn_wexpand(result, m->top)) 480 { 481 ATALLAerr(ATALLA_F_ATALLA_MOD_EXP,ATALLA_R_BN_EXPAND_FAIL); 482 goto err; 483 } 484 /* Prepare the key-data */ 485 memset(&keydata, 0,sizeof keydata); 486 numbytes = BN_num_bytes(m); 487 memset(exponent->d, 0, numbytes); 488 memset(modulus->d, 0, numbytes); 489 BN_bn2bin(p, (unsigned char *)exponent->d + numbytes - BN_num_bytes(p)); 490 BN_bn2bin(m, (unsigned char *)modulus->d + numbytes - BN_num_bytes(m)); 491 keydata.privateExponent.data = (unsigned char *)exponent->d; 492 keydata.privateExponent.len = numbytes; 493 keydata.modulus.data = (unsigned char *)modulus->d; 494 keydata.modulus.len = numbytes; 495 /* Prepare the argument */ 496 memset(argument->d, 0, numbytes); 497 memset(result->d, 0, numbytes); 498 BN_bn2bin(a, (unsigned char *)argument->d + numbytes - BN_num_bytes(a)); 499 /* Perform the operation */ 500 if(p_Atalla_RSAPrivateKeyOpFn(&keydata, (unsigned char *)result->d, 501 (unsigned char *)argument->d, 502 keydata.modulus.len) != 0) 503 { 504 ATALLAerr(ATALLA_F_ATALLA_MOD_EXP,ATALLA_R_REQUEST_FAILED); 505 goto err; 506 } 507 /* Convert the response */ 508 BN_bin2bn((unsigned char *)result->d, numbytes, r); 509 to_return = 1; 510err: 511 BN_CTX_end(ctx); 512 return to_return; 513 } 514 515#ifndef OPENSSL_NO_RSA 516static int atalla_rsa_mod_exp(BIGNUM *r0, const BIGNUM *I, RSA *rsa, BN_CTX *ctx) 517 { 518 int to_return = 0; 519 520 if(!atalla_dso) 521 { 522 ATALLAerr(ATALLA_F_ATALLA_RSA_MOD_EXP,ATALLA_R_NOT_LOADED); 523 goto err; 524 } 525 if(!rsa->d || !rsa->n) 526 { 527 ATALLAerr(ATALLA_F_ATALLA_RSA_MOD_EXP,ATALLA_R_MISSING_KEY_COMPONENTS); 528 goto err; 529 } 530 to_return = atalla_mod_exp(r0, I, rsa->d, rsa->n, ctx); 531err: 532 return to_return; 533 } 534#endif 535 536#ifndef OPENSSL_NO_DSA 537/* This code was liberated and adapted from the commented-out code in 538 * dsa_ossl.c. Because of the unoptimised form of the Atalla acceleration 539 * (it doesn't have a CRT form for RSA), this function means that an 540 * Atalla system running with a DSA server certificate can handshake 541 * around 5 or 6 times faster/more than an equivalent system running with 542 * RSA. Just check out the "signs" statistics from the RSA and DSA parts 543 * of "openssl speed -engine atalla dsa1024 rsa1024". */ 544static int atalla_dsa_mod_exp(DSA *dsa, BIGNUM *rr, BIGNUM *a1, 545 BIGNUM *p1, BIGNUM *a2, BIGNUM *p2, BIGNUM *m, 546 BN_CTX *ctx, BN_MONT_CTX *in_mont) 547 { 548 BIGNUM t; 549 int to_return = 0; 550 551 BN_init(&t); 552 /* let rr = a1 ^ p1 mod m */ 553 if (!atalla_mod_exp(rr,a1,p1,m,ctx)) goto end; 554 /* let t = a2 ^ p2 mod m */ 555 if (!atalla_mod_exp(&t,a2,p2,m,ctx)) goto end; 556 /* let rr = rr * t mod m */ 557 if (!BN_mod_mul(rr,rr,&t,m,ctx)) goto end; 558 to_return = 1; 559end: 560 BN_free(&t); 561 return to_return; 562 } 563 564static int atalla_mod_exp_dsa(DSA *dsa, BIGNUM *r, BIGNUM *a, 565 const BIGNUM *p, const BIGNUM *m, BN_CTX *ctx, 566 BN_MONT_CTX *m_ctx) 567 { 568 return atalla_mod_exp(r, a, p, m, ctx); 569 } 570#endif 571 572#ifndef OPENSSL_NO_RSA 573/* This function is aliased to mod_exp (with the mont stuff dropped). */ 574static int atalla_mod_exp_mont(BIGNUM *r, const BIGNUM *a, const BIGNUM *p, 575 const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx) 576 { 577 return atalla_mod_exp(r, a, p, m, ctx); 578 } 579#endif 580 581#ifndef OPENSSL_NO_DH 582/* This function is aliased to mod_exp (with the dh and mont dropped). */ 583static int atalla_mod_exp_dh(const DH *dh, BIGNUM *r, 584 const BIGNUM *a, const BIGNUM *p, 585 const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx) 586 { 587 return atalla_mod_exp(r, a, p, m, ctx); 588 } 589#endif 590 591/* This stuff is needed if this ENGINE is being compiled into a self-contained 592 * shared-library. */ 593#ifndef OPENSSL_NO_DYNAMIC_ENGINE 594static int bind_fn(ENGINE *e, const char *id) 595 { 596 if(id && (strcmp(id, engine_atalla_id) != 0)) 597 return 0; 598 if(!bind_helper(e)) 599 return 0; 600 return 1; 601 } 602IMPLEMENT_DYNAMIC_CHECK_FN() 603IMPLEMENT_DYNAMIC_BIND_FN(bind_fn) 604#endif /* OPENSSL_NO_DYNAMIC_ENGINE */ 605 606#endif /* !OPENSSL_NO_HW_ATALLA */ 607#endif /* !OPENSSL_NO_HW */ 608