1/* crypto/engine/hw_cswift.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_CSWIFT 67 68/* Attribution notice: Rainbow have generously allowed me to reproduce 69 * the necessary definitions here from their API. This means the support 70 * can build independently of whether application builders have the 71 * API or hardware. This will allow developers to easily produce software 72 * that has latent hardware support for any users that have accelerators 73 * installed, without the developers themselves needing anything extra. 74 * 75 * I have only clipped the parts from the CryptoSwift header files that 76 * are (or seem) relevant to the CryptoSwift support code. This is 77 * simply to keep the file sizes reasonable. 78 * [Geoff] 79 */ 80#ifdef FLAT_INC 81#include "cswift.h" 82#else 83#include "vendor_defns/cswift.h" 84#endif 85 86#define CSWIFT_LIB_NAME "cswift engine" 87#include "hw_cswift_err.c" 88 89static int cswift_destroy(ENGINE *e); 90static int cswift_init(ENGINE *e); 91static int cswift_finish(ENGINE *e); 92static int cswift_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f)()); 93 94/* BIGNUM stuff */ 95static int cswift_mod_exp(BIGNUM *r, const BIGNUM *a, const BIGNUM *p, 96 const BIGNUM *m, BN_CTX *ctx); 97static int cswift_mod_exp_crt(BIGNUM *r, const BIGNUM *a, const BIGNUM *p, 98 const BIGNUM *q, const BIGNUM *dmp1, const BIGNUM *dmq1, 99 const BIGNUM *iqmp, BN_CTX *ctx); 100 101#ifndef OPENSSL_NO_RSA 102/* RSA stuff */ 103static int cswift_rsa_mod_exp(BIGNUM *r0, const BIGNUM *I, RSA *rsa); 104#endif 105/* This function is aliased to mod_exp (with the mont stuff dropped). */ 106static int cswift_mod_exp_mont(BIGNUM *r, const BIGNUM *a, const BIGNUM *p, 107 const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx); 108 109#ifndef OPENSSL_NO_DSA 110/* DSA stuff */ 111static DSA_SIG *cswift_dsa_sign(const unsigned char *dgst, int dlen, DSA *dsa); 112static int cswift_dsa_verify(const unsigned char *dgst, int dgst_len, 113 DSA_SIG *sig, DSA *dsa); 114#endif 115 116#ifndef OPENSSL_NO_DH 117/* DH stuff */ 118/* This function is alised to mod_exp (with the DH and mont dropped). */ 119static int cswift_mod_exp_dh(const DH *dh, BIGNUM *r, 120 const BIGNUM *a, const BIGNUM *p, 121 const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx); 122#endif 123 124/* RAND stuff */ 125static int cswift_rand_bytes(unsigned char *buf, int num); 126static int cswift_rand_status(void); 127 128/* The definitions for control commands specific to this engine */ 129#define CSWIFT_CMD_SO_PATH ENGINE_CMD_BASE 130static const ENGINE_CMD_DEFN cswift_cmd_defns[] = { 131 {CSWIFT_CMD_SO_PATH, 132 "SO_PATH", 133 "Specifies the path to the 'cswift' shared library", 134 ENGINE_CMD_FLAG_STRING}, 135 {0, NULL, NULL, 0} 136 }; 137 138#ifndef OPENSSL_NO_RSA 139/* Our internal RSA_METHOD that we provide pointers to */ 140static RSA_METHOD cswift_rsa = 141 { 142 "CryptoSwift RSA method", 143 NULL, 144 NULL, 145 NULL, 146 NULL, 147 cswift_rsa_mod_exp, 148 cswift_mod_exp_mont, 149 NULL, 150 NULL, 151 0, 152 NULL, 153 NULL, 154 NULL 155 }; 156#endif 157 158#ifndef OPENSSL_NO_DSA 159/* Our internal DSA_METHOD that we provide pointers to */ 160static DSA_METHOD cswift_dsa = 161 { 162 "CryptoSwift DSA method", 163 cswift_dsa_sign, 164 NULL, /* dsa_sign_setup */ 165 cswift_dsa_verify, 166 NULL, /* dsa_mod_exp */ 167 NULL, /* bn_mod_exp */ 168 NULL, /* init */ 169 NULL, /* finish */ 170 0, /* flags */ 171 NULL /* app_data */ 172 }; 173#endif 174 175#ifndef OPENSSL_NO_DH 176/* Our internal DH_METHOD that we provide pointers to */ 177static DH_METHOD cswift_dh = 178 { 179 "CryptoSwift DH method", 180 NULL, 181 NULL, 182 cswift_mod_exp_dh, 183 NULL, 184 NULL, 185 0, 186 NULL 187 }; 188#endif 189 190static RAND_METHOD cswift_random = 191 { 192 /* "CryptoSwift RAND method", */ 193 NULL, 194 cswift_rand_bytes, 195 NULL, 196 NULL, 197 cswift_rand_bytes, 198 cswift_rand_status, 199 }; 200 201 202/* Constants used when creating the ENGINE */ 203static const char *engine_cswift_id = "cswift"; 204static const char *engine_cswift_name = "CryptoSwift hardware engine support"; 205 206/* This internal function is used by ENGINE_cswift() and possibly by the 207 * "dynamic" ENGINE support too */ 208static int bind_helper(ENGINE *e) 209 { 210#ifndef OPENSSL_NO_RSA 211 const RSA_METHOD *meth1; 212#endif 213#ifndef OPENSSL_NO_DH 214 const DH_METHOD *meth2; 215#endif 216 if(!ENGINE_set_id(e, engine_cswift_id) || 217 !ENGINE_set_name(e, engine_cswift_name) || 218#ifndef OPENSSL_NO_RSA 219 !ENGINE_set_RSA(e, &cswift_rsa) || 220#endif 221#ifndef OPENSSL_NO_DSA 222 !ENGINE_set_DSA(e, &cswift_dsa) || 223#endif 224#ifndef OPENSSL_NO_DH 225 !ENGINE_set_DH(e, &cswift_dh) || 226#endif 227 !ENGINE_set_RAND(e, &cswift_random) || 228 !ENGINE_set_destroy_function(e, cswift_destroy) || 229 !ENGINE_set_init_function(e, cswift_init) || 230 !ENGINE_set_finish_function(e, cswift_finish) || 231 !ENGINE_set_ctrl_function(e, cswift_ctrl) || 232 !ENGINE_set_cmd_defns(e, cswift_cmd_defns)) 233 return 0; 234 235#ifndef OPENSSL_NO_RSA 236 /* We know that the "PKCS1_SSLeay()" functions hook properly 237 * to the cswift-specific mod_exp and mod_exp_crt so we use 238 * those functions. NB: We don't use ENGINE_openssl() or 239 * anything "more generic" because something like the RSAref 240 * code may not hook properly, and if you own one of these 241 * cards then you have the right to do RSA operations on it 242 * anyway! */ 243 meth1 = RSA_PKCS1_SSLeay(); 244 cswift_rsa.rsa_pub_enc = meth1->rsa_pub_enc; 245 cswift_rsa.rsa_pub_dec = meth1->rsa_pub_dec; 246 cswift_rsa.rsa_priv_enc = meth1->rsa_priv_enc; 247 cswift_rsa.rsa_priv_dec = meth1->rsa_priv_dec; 248#endif 249 250#ifndef OPENSSL_NO_DH 251 /* Much the same for Diffie-Hellman */ 252 meth2 = DH_OpenSSL(); 253 cswift_dh.generate_key = meth2->generate_key; 254 cswift_dh.compute_key = meth2->compute_key; 255#endif 256 257 /* Ensure the cswift error handling is set up */ 258 ERR_load_CSWIFT_strings(); 259 return 1; 260 } 261 262#ifndef ENGINE_DYNAMIC_SUPPORT 263static ENGINE *engine_cswift(void) 264 { 265 ENGINE *ret = ENGINE_new(); 266 if(!ret) 267 return NULL; 268 if(!bind_helper(ret)) 269 { 270 ENGINE_free(ret); 271 return NULL; 272 } 273 return ret; 274 } 275 276void ENGINE_load_cswift(void) 277 { 278 /* Copied from eng_[openssl|dyn].c */ 279 ENGINE *toadd = engine_cswift(); 280 if(!toadd) return; 281 ENGINE_add(toadd); 282 ENGINE_free(toadd); 283 ERR_clear_error(); 284 } 285#endif 286 287/* This is a process-global DSO handle used for loading and unloading 288 * the CryptoSwift library. NB: This is only set (or unset) during an 289 * init() or finish() call (reference counts permitting) and they're 290 * operating with global locks, so this should be thread-safe 291 * implicitly. */ 292static DSO *cswift_dso = NULL; 293 294/* These are the function pointers that are (un)set when the library has 295 * successfully (un)loaded. */ 296t_swAcquireAccContext *p_CSwift_AcquireAccContext = NULL; 297t_swAttachKeyParam *p_CSwift_AttachKeyParam = NULL; 298t_swSimpleRequest *p_CSwift_SimpleRequest = NULL; 299t_swReleaseAccContext *p_CSwift_ReleaseAccContext = NULL; 300 301/* Used in the DSO operations. */ 302static const char *CSWIFT_LIBNAME = NULL; 303static const char *get_CSWIFT_LIBNAME(void) 304 { 305 if(CSWIFT_LIBNAME) 306 return CSWIFT_LIBNAME; 307 return "swift"; 308 } 309static void free_CSWIFT_LIBNAME(void) 310 { 311 if(CSWIFT_LIBNAME) 312 OPENSSL_free((void*)CSWIFT_LIBNAME); 313 CSWIFT_LIBNAME = NULL; 314 } 315static long set_CSWIFT_LIBNAME(const char *name) 316 { 317 free_CSWIFT_LIBNAME(); 318 return (((CSWIFT_LIBNAME = BUF_strdup(name)) != NULL) ? 1 : 0); 319 } 320static const char *CSWIFT_F1 = "swAcquireAccContext"; 321static const char *CSWIFT_F2 = "swAttachKeyParam"; 322static const char *CSWIFT_F3 = "swSimpleRequest"; 323static const char *CSWIFT_F4 = "swReleaseAccContext"; 324 325 326/* CryptoSwift library functions and mechanics - these are used by the 327 * higher-level functions further down. NB: As and where there's no 328 * error checking, take a look lower down where these functions are 329 * called, the checking and error handling is probably down there. */ 330 331/* utility function to obtain a context */ 332static int get_context(SW_CONTEXT_HANDLE *hac) 333 { 334 SW_STATUS status; 335 336 status = p_CSwift_AcquireAccContext(hac); 337 if(status != SW_OK) 338 return 0; 339 return 1; 340 } 341 342/* similarly to release one. */ 343static void release_context(SW_CONTEXT_HANDLE hac) 344 { 345 p_CSwift_ReleaseAccContext(hac); 346 } 347 348/* Destructor (complements the "ENGINE_cswift()" constructor) */ 349static int cswift_destroy(ENGINE *e) 350 { 351 free_CSWIFT_LIBNAME(); 352 ERR_unload_CSWIFT_strings(); 353 return 1; 354 } 355 356/* (de)initialisation functions. */ 357static int cswift_init(ENGINE *e) 358 { 359 SW_CONTEXT_HANDLE hac; 360 t_swAcquireAccContext *p1; 361 t_swAttachKeyParam *p2; 362 t_swSimpleRequest *p3; 363 t_swReleaseAccContext *p4; 364 365 if(cswift_dso != NULL) 366 { 367 CSWIFTerr(CSWIFT_F_CSWIFT_INIT,CSWIFT_R_ALREADY_LOADED); 368 goto err; 369 } 370 /* Attempt to load libswift.so/swift.dll/whatever. */ 371 cswift_dso = DSO_load(NULL, get_CSWIFT_LIBNAME(), NULL, 0); 372 if(cswift_dso == NULL) 373 { 374 CSWIFTerr(CSWIFT_F_CSWIFT_INIT,CSWIFT_R_NOT_LOADED); 375 goto err; 376 } 377 if(!(p1 = (t_swAcquireAccContext *) 378 DSO_bind_func(cswift_dso, CSWIFT_F1)) || 379 !(p2 = (t_swAttachKeyParam *) 380 DSO_bind_func(cswift_dso, CSWIFT_F2)) || 381 !(p3 = (t_swSimpleRequest *) 382 DSO_bind_func(cswift_dso, CSWIFT_F3)) || 383 !(p4 = (t_swReleaseAccContext *) 384 DSO_bind_func(cswift_dso, CSWIFT_F4))) 385 { 386 CSWIFTerr(CSWIFT_F_CSWIFT_INIT,CSWIFT_R_NOT_LOADED); 387 goto err; 388 } 389 /* Copy the pointers */ 390 p_CSwift_AcquireAccContext = p1; 391 p_CSwift_AttachKeyParam = p2; 392 p_CSwift_SimpleRequest = p3; 393 p_CSwift_ReleaseAccContext = p4; 394 /* Try and get a context - if not, we may have a DSO but no 395 * accelerator! */ 396 if(!get_context(&hac)) 397 { 398 CSWIFTerr(CSWIFT_F_CSWIFT_INIT,CSWIFT_R_UNIT_FAILURE); 399 goto err; 400 } 401 release_context(hac); 402 /* Everything's fine. */ 403 return 1; 404err: 405 if(cswift_dso) 406 DSO_free(cswift_dso); 407 p_CSwift_AcquireAccContext = NULL; 408 p_CSwift_AttachKeyParam = NULL; 409 p_CSwift_SimpleRequest = NULL; 410 p_CSwift_ReleaseAccContext = NULL; 411 return 0; 412 } 413 414static int cswift_finish(ENGINE *e) 415 { 416 free_CSWIFT_LIBNAME(); 417 if(cswift_dso == NULL) 418 { 419 CSWIFTerr(CSWIFT_F_CSWIFT_FINISH,CSWIFT_R_NOT_LOADED); 420 return 0; 421 } 422 if(!DSO_free(cswift_dso)) 423 { 424 CSWIFTerr(CSWIFT_F_CSWIFT_FINISH,CSWIFT_R_UNIT_FAILURE); 425 return 0; 426 } 427 cswift_dso = NULL; 428 p_CSwift_AcquireAccContext = NULL; 429 p_CSwift_AttachKeyParam = NULL; 430 p_CSwift_SimpleRequest = NULL; 431 p_CSwift_ReleaseAccContext = NULL; 432 return 1; 433 } 434 435static int cswift_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f)()) 436 { 437 int initialised = ((cswift_dso == NULL) ? 0 : 1); 438 switch(cmd) 439 { 440 case CSWIFT_CMD_SO_PATH: 441 if(p == NULL) 442 { 443 CSWIFTerr(CSWIFT_F_CSWIFT_CTRL,ERR_R_PASSED_NULL_PARAMETER); 444 return 0; 445 } 446 if(initialised) 447 { 448 CSWIFTerr(CSWIFT_F_CSWIFT_CTRL,CSWIFT_R_ALREADY_LOADED); 449 return 0; 450 } 451 return set_CSWIFT_LIBNAME((const char *)p); 452 default: 453 break; 454 } 455 CSWIFTerr(CSWIFT_F_CSWIFT_CTRL,CSWIFT_R_CTRL_COMMAND_NOT_IMPLEMENTED); 456 return 0; 457 } 458 459/* Un petit mod_exp */ 460static int cswift_mod_exp(BIGNUM *r, const BIGNUM *a, const BIGNUM *p, 461 const BIGNUM *m, BN_CTX *ctx) 462 { 463 /* I need somewhere to store temporary serialised values for 464 * use with the CryptoSwift API calls. A neat cheat - I'll use 465 * BIGNUMs from the BN_CTX but access their arrays directly as 466 * byte arrays <grin>. This way I don't have to clean anything 467 * up. */ 468 BIGNUM *modulus; 469 BIGNUM *exponent; 470 BIGNUM *argument; 471 BIGNUM *result; 472 SW_STATUS sw_status; 473 SW_LARGENUMBER arg, res; 474 SW_PARAM sw_param; 475 SW_CONTEXT_HANDLE hac; 476 int to_return, acquired; 477 478 modulus = exponent = argument = result = NULL; 479 to_return = 0; /* expect failure */ 480 acquired = 0; 481 482 if(!get_context(&hac)) 483 { 484 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP,CSWIFT_R_UNIT_FAILURE); 485 goto err; 486 } 487 acquired = 1; 488 /* Prepare the params */ 489 BN_CTX_start(ctx); 490 modulus = BN_CTX_get(ctx); 491 exponent = BN_CTX_get(ctx); 492 argument = BN_CTX_get(ctx); 493 result = BN_CTX_get(ctx); 494 if(!result) 495 { 496 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP,CSWIFT_R_BN_CTX_FULL); 497 goto err; 498 } 499 if(!bn_wexpand(modulus, m->top) || !bn_wexpand(exponent, p->top) || 500 !bn_wexpand(argument, a->top) || !bn_wexpand(result, m->top)) 501 { 502 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP,CSWIFT_R_BN_EXPAND_FAIL); 503 goto err; 504 } 505 sw_param.type = SW_ALG_EXP; 506 sw_param.up.exp.modulus.nbytes = BN_bn2bin(m, 507 (unsigned char *)modulus->d); 508 sw_param.up.exp.modulus.value = (unsigned char *)modulus->d; 509 sw_param.up.exp.exponent.nbytes = BN_bn2bin(p, 510 (unsigned char *)exponent->d); 511 sw_param.up.exp.exponent.value = (unsigned char *)exponent->d; 512 /* Attach the key params */ 513 sw_status = p_CSwift_AttachKeyParam(hac, &sw_param); 514 switch(sw_status) 515 { 516 case SW_OK: 517 break; 518 case SW_ERR_INPUT_SIZE: 519 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP,CSWIFT_R_BAD_KEY_SIZE); 520 goto err; 521 default: 522 { 523 char tmpbuf[DECIMAL_SIZE(sw_status)+1]; 524 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP,CSWIFT_R_REQUEST_FAILED); 525 sprintf(tmpbuf, "%ld", sw_status); 526 ERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf); 527 } 528 goto err; 529 } 530 /* Prepare the argument and response */ 531 arg.nbytes = BN_bn2bin(a, (unsigned char *)argument->d); 532 arg.value = (unsigned char *)argument->d; 533 res.nbytes = BN_num_bytes(m); 534 memset(result->d, 0, res.nbytes); 535 res.value = (unsigned char *)result->d; 536 /* Perform the operation */ 537 if((sw_status = p_CSwift_SimpleRequest(hac, SW_CMD_MODEXP, &arg, 1, 538 &res, 1)) != SW_OK) 539 { 540 char tmpbuf[DECIMAL_SIZE(sw_status)+1]; 541 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP,CSWIFT_R_REQUEST_FAILED); 542 sprintf(tmpbuf, "%ld", sw_status); 543 ERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf); 544 goto err; 545 } 546 /* Convert the response */ 547 BN_bin2bn((unsigned char *)result->d, res.nbytes, r); 548 to_return = 1; 549err: 550 if(acquired) 551 release_context(hac); 552 BN_CTX_end(ctx); 553 return to_return; 554 } 555 556/* Un petit mod_exp chinois */ 557static int cswift_mod_exp_crt(BIGNUM *r, const BIGNUM *a, const BIGNUM *p, 558 const BIGNUM *q, const BIGNUM *dmp1, 559 const BIGNUM *dmq1, const BIGNUM *iqmp, BN_CTX *ctx) 560 { 561 SW_STATUS sw_status; 562 SW_LARGENUMBER arg, res; 563 SW_PARAM sw_param; 564 SW_CONTEXT_HANDLE hac; 565 BIGNUM *rsa_p = NULL; 566 BIGNUM *rsa_q = NULL; 567 BIGNUM *rsa_dmp1 = NULL; 568 BIGNUM *rsa_dmq1 = NULL; 569 BIGNUM *rsa_iqmp = NULL; 570 BIGNUM *argument = NULL; 571 BIGNUM *result = NULL; 572 int to_return = 0; /* expect failure */ 573 int acquired = 0; 574 575 if(!get_context(&hac)) 576 { 577 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP_CRT,CSWIFT_R_UNIT_FAILURE); 578 goto err; 579 } 580 acquired = 1; 581 /* Prepare the params */ 582 BN_CTX_start(ctx); 583 rsa_p = BN_CTX_get(ctx); 584 rsa_q = BN_CTX_get(ctx); 585 rsa_dmp1 = BN_CTX_get(ctx); 586 rsa_dmq1 = BN_CTX_get(ctx); 587 rsa_iqmp = BN_CTX_get(ctx); 588 argument = BN_CTX_get(ctx); 589 result = BN_CTX_get(ctx); 590 if(!result) 591 { 592 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP_CRT,CSWIFT_R_BN_CTX_FULL); 593 goto err; 594 } 595 if(!bn_wexpand(rsa_p, p->top) || !bn_wexpand(rsa_q, q->top) || 596 !bn_wexpand(rsa_dmp1, dmp1->top) || 597 !bn_wexpand(rsa_dmq1, dmq1->top) || 598 !bn_wexpand(rsa_iqmp, iqmp->top) || 599 !bn_wexpand(argument, a->top) || 600 !bn_wexpand(result, p->top + q->top)) 601 { 602 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP_CRT,CSWIFT_R_BN_EXPAND_FAIL); 603 goto err; 604 } 605 sw_param.type = SW_ALG_CRT; 606 sw_param.up.crt.p.nbytes = BN_bn2bin(p, (unsigned char *)rsa_p->d); 607 sw_param.up.crt.p.value = (unsigned char *)rsa_p->d; 608 sw_param.up.crt.q.nbytes = BN_bn2bin(q, (unsigned char *)rsa_q->d); 609 sw_param.up.crt.q.value = (unsigned char *)rsa_q->d; 610 sw_param.up.crt.dmp1.nbytes = BN_bn2bin(dmp1, 611 (unsigned char *)rsa_dmp1->d); 612 sw_param.up.crt.dmp1.value = (unsigned char *)rsa_dmp1->d; 613 sw_param.up.crt.dmq1.nbytes = BN_bn2bin(dmq1, 614 (unsigned char *)rsa_dmq1->d); 615 sw_param.up.crt.dmq1.value = (unsigned char *)rsa_dmq1->d; 616 sw_param.up.crt.iqmp.nbytes = BN_bn2bin(iqmp, 617 (unsigned char *)rsa_iqmp->d); 618 sw_param.up.crt.iqmp.value = (unsigned char *)rsa_iqmp->d; 619 /* Attach the key params */ 620 sw_status = p_CSwift_AttachKeyParam(hac, &sw_param); 621 switch(sw_status) 622 { 623 case SW_OK: 624 break; 625 case SW_ERR_INPUT_SIZE: 626 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP_CRT,CSWIFT_R_BAD_KEY_SIZE); 627 goto err; 628 default: 629 { 630 char tmpbuf[DECIMAL_SIZE(sw_status)+1]; 631 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP_CRT,CSWIFT_R_REQUEST_FAILED); 632 sprintf(tmpbuf, "%ld", sw_status); 633 ERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf); 634 } 635 goto err; 636 } 637 /* Prepare the argument and response */ 638 arg.nbytes = BN_bn2bin(a, (unsigned char *)argument->d); 639 arg.value = (unsigned char *)argument->d; 640 res.nbytes = 2 * BN_num_bytes(p); 641 memset(result->d, 0, res.nbytes); 642 res.value = (unsigned char *)result->d; 643 /* Perform the operation */ 644 if((sw_status = p_CSwift_SimpleRequest(hac, SW_CMD_MODEXP_CRT, &arg, 1, 645 &res, 1)) != SW_OK) 646 { 647 char tmpbuf[DECIMAL_SIZE(sw_status)+1]; 648 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP_CRT,CSWIFT_R_REQUEST_FAILED); 649 sprintf(tmpbuf, "%ld", sw_status); 650 ERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf); 651 goto err; 652 } 653 /* Convert the response */ 654 BN_bin2bn((unsigned char *)result->d, res.nbytes, r); 655 to_return = 1; 656err: 657 if(acquired) 658 release_context(hac); 659 BN_CTX_end(ctx); 660 return to_return; 661 } 662 663#ifndef OPENSSL_NO_RSA 664static int cswift_rsa_mod_exp(BIGNUM *r0, const BIGNUM *I, RSA *rsa) 665 { 666 BN_CTX *ctx; 667 int to_return = 0; 668 669 if((ctx = BN_CTX_new()) == NULL) 670 goto err; 671 if(!rsa->p || !rsa->q || !rsa->dmp1 || !rsa->dmq1 || !rsa->iqmp) 672 { 673 CSWIFTerr(CSWIFT_F_CSWIFT_RSA_MOD_EXP,CSWIFT_R_MISSING_KEY_COMPONENTS); 674 goto err; 675 } 676 to_return = cswift_mod_exp_crt(r0, I, rsa->p, rsa->q, rsa->dmp1, 677 rsa->dmq1, rsa->iqmp, ctx); 678err: 679 if(ctx) 680 BN_CTX_free(ctx); 681 return to_return; 682 } 683#endif 684 685/* This function is aliased to mod_exp (with the mont stuff dropped). */ 686static int cswift_mod_exp_mont(BIGNUM *r, const BIGNUM *a, const BIGNUM *p, 687 const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx) 688 { 689 return cswift_mod_exp(r, a, p, m, ctx); 690 } 691 692#ifndef OPENSSL_NO_DSA 693static DSA_SIG *cswift_dsa_sign(const unsigned char *dgst, int dlen, DSA *dsa) 694 { 695 SW_CONTEXT_HANDLE hac; 696 SW_PARAM sw_param; 697 SW_STATUS sw_status; 698 SW_LARGENUMBER arg, res; 699 unsigned char *ptr; 700 BN_CTX *ctx; 701 BIGNUM *dsa_p = NULL; 702 BIGNUM *dsa_q = NULL; 703 BIGNUM *dsa_g = NULL; 704 BIGNUM *dsa_key = NULL; 705 BIGNUM *result = NULL; 706 DSA_SIG *to_return = NULL; 707 int acquired = 0; 708 709 if((ctx = BN_CTX_new()) == NULL) 710 goto err; 711 if(!get_context(&hac)) 712 { 713 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_SIGN,CSWIFT_R_UNIT_FAILURE); 714 goto err; 715 } 716 acquired = 1; 717 /* Prepare the params */ 718 BN_CTX_start(ctx); 719 dsa_p = BN_CTX_get(ctx); 720 dsa_q = BN_CTX_get(ctx); 721 dsa_g = BN_CTX_get(ctx); 722 dsa_key = BN_CTX_get(ctx); 723 result = BN_CTX_get(ctx); 724 if(!result) 725 { 726 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_SIGN,CSWIFT_R_BN_CTX_FULL); 727 goto err; 728 } 729 if(!bn_wexpand(dsa_p, dsa->p->top) || 730 !bn_wexpand(dsa_q, dsa->q->top) || 731 !bn_wexpand(dsa_g, dsa->g->top) || 732 !bn_wexpand(dsa_key, dsa->priv_key->top) || 733 !bn_wexpand(result, dsa->p->top)) 734 { 735 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_SIGN,CSWIFT_R_BN_EXPAND_FAIL); 736 goto err; 737 } 738 sw_param.type = SW_ALG_DSA; 739 sw_param.up.dsa.p.nbytes = BN_bn2bin(dsa->p, 740 (unsigned char *)dsa_p->d); 741 sw_param.up.dsa.p.value = (unsigned char *)dsa_p->d; 742 sw_param.up.dsa.q.nbytes = BN_bn2bin(dsa->q, 743 (unsigned char *)dsa_q->d); 744 sw_param.up.dsa.q.value = (unsigned char *)dsa_q->d; 745 sw_param.up.dsa.g.nbytes = BN_bn2bin(dsa->g, 746 (unsigned char *)dsa_g->d); 747 sw_param.up.dsa.g.value = (unsigned char *)dsa_g->d; 748 sw_param.up.dsa.key.nbytes = BN_bn2bin(dsa->priv_key, 749 (unsigned char *)dsa_key->d); 750 sw_param.up.dsa.key.value = (unsigned char *)dsa_key->d; 751 /* Attach the key params */ 752 sw_status = p_CSwift_AttachKeyParam(hac, &sw_param); 753 switch(sw_status) 754 { 755 case SW_OK: 756 break; 757 case SW_ERR_INPUT_SIZE: 758 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_SIGN,CSWIFT_R_BAD_KEY_SIZE); 759 goto err; 760 default: 761 { 762 char tmpbuf[DECIMAL_SIZE(sw_status)+1]; 763 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_SIGN,CSWIFT_R_REQUEST_FAILED); 764 sprintf(tmpbuf, "%ld", sw_status); 765 ERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf); 766 } 767 goto err; 768 } 769 /* Prepare the argument and response */ 770 arg.nbytes = dlen; 771 arg.value = (unsigned char *)dgst; 772 res.nbytes = BN_num_bytes(dsa->p); 773 memset(result->d, 0, res.nbytes); 774 res.value = (unsigned char *)result->d; 775 /* Perform the operation */ 776 sw_status = p_CSwift_SimpleRequest(hac, SW_CMD_DSS_SIGN, &arg, 1, 777 &res, 1); 778 if(sw_status != SW_OK) 779 { 780 char tmpbuf[DECIMAL_SIZE(sw_status)+1]; 781 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_SIGN,CSWIFT_R_REQUEST_FAILED); 782 sprintf(tmpbuf, "%ld", sw_status); 783 ERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf); 784 goto err; 785 } 786 /* Convert the response */ 787 ptr = (unsigned char *)result->d; 788 if((to_return = DSA_SIG_new()) == NULL) 789 goto err; 790 to_return->r = BN_bin2bn((unsigned char *)result->d, 20, NULL); 791 to_return->s = BN_bin2bn((unsigned char *)result->d + 20, 20, NULL); 792 793err: 794 if(acquired) 795 release_context(hac); 796 if(ctx) 797 { 798 BN_CTX_end(ctx); 799 BN_CTX_free(ctx); 800 } 801 return to_return; 802 } 803 804static int cswift_dsa_verify(const unsigned char *dgst, int dgst_len, 805 DSA_SIG *sig, DSA *dsa) 806 { 807 SW_CONTEXT_HANDLE hac; 808 SW_PARAM sw_param; 809 SW_STATUS sw_status; 810 SW_LARGENUMBER arg[2], res; 811 unsigned long sig_result; 812 BN_CTX *ctx; 813 BIGNUM *dsa_p = NULL; 814 BIGNUM *dsa_q = NULL; 815 BIGNUM *dsa_g = NULL; 816 BIGNUM *dsa_key = NULL; 817 BIGNUM *argument = NULL; 818 int to_return = -1; 819 int acquired = 0; 820 821 if((ctx = BN_CTX_new()) == NULL) 822 goto err; 823 if(!get_context(&hac)) 824 { 825 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_VERIFY,CSWIFT_R_UNIT_FAILURE); 826 goto err; 827 } 828 acquired = 1; 829 /* Prepare the params */ 830 BN_CTX_start(ctx); 831 dsa_p = BN_CTX_get(ctx); 832 dsa_q = BN_CTX_get(ctx); 833 dsa_g = BN_CTX_get(ctx); 834 dsa_key = BN_CTX_get(ctx); 835 argument = BN_CTX_get(ctx); 836 if(!argument) 837 { 838 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_VERIFY,CSWIFT_R_BN_CTX_FULL); 839 goto err; 840 } 841 if(!bn_wexpand(dsa_p, dsa->p->top) || 842 !bn_wexpand(dsa_q, dsa->q->top) || 843 !bn_wexpand(dsa_g, dsa->g->top) || 844 !bn_wexpand(dsa_key, dsa->pub_key->top) || 845 !bn_wexpand(argument, 40)) 846 { 847 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_VERIFY,CSWIFT_R_BN_EXPAND_FAIL); 848 goto err; 849 } 850 sw_param.type = SW_ALG_DSA; 851 sw_param.up.dsa.p.nbytes = BN_bn2bin(dsa->p, 852 (unsigned char *)dsa_p->d); 853 sw_param.up.dsa.p.value = (unsigned char *)dsa_p->d; 854 sw_param.up.dsa.q.nbytes = BN_bn2bin(dsa->q, 855 (unsigned char *)dsa_q->d); 856 sw_param.up.dsa.q.value = (unsigned char *)dsa_q->d; 857 sw_param.up.dsa.g.nbytes = BN_bn2bin(dsa->g, 858 (unsigned char *)dsa_g->d); 859 sw_param.up.dsa.g.value = (unsigned char *)dsa_g->d; 860 sw_param.up.dsa.key.nbytes = BN_bn2bin(dsa->pub_key, 861 (unsigned char *)dsa_key->d); 862 sw_param.up.dsa.key.value = (unsigned char *)dsa_key->d; 863 /* Attach the key params */ 864 sw_status = p_CSwift_AttachKeyParam(hac, &sw_param); 865 switch(sw_status) 866 { 867 case SW_OK: 868 break; 869 case SW_ERR_INPUT_SIZE: 870 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_VERIFY,CSWIFT_R_BAD_KEY_SIZE); 871 goto err; 872 default: 873 { 874 char tmpbuf[DECIMAL_SIZE(sw_status)+1]; 875 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_VERIFY,CSWIFT_R_REQUEST_FAILED); 876 sprintf(tmpbuf, "%ld", sw_status); 877 ERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf); 878 } 879 goto err; 880 } 881 /* Prepare the argument and response */ 882 arg[0].nbytes = dgst_len; 883 arg[0].value = (unsigned char *)dgst; 884 arg[1].nbytes = 40; 885 arg[1].value = (unsigned char *)argument->d; 886 memset(arg[1].value, 0, 40); 887 BN_bn2bin(sig->r, arg[1].value + 20 - BN_num_bytes(sig->r)); 888 BN_bn2bin(sig->s, arg[1].value + 40 - BN_num_bytes(sig->s)); 889 res.nbytes = 4; /* unsigned long */ 890 res.value = (unsigned char *)(&sig_result); 891 /* Perform the operation */ 892 sw_status = p_CSwift_SimpleRequest(hac, SW_CMD_DSS_VERIFY, arg, 2, 893 &res, 1); 894 if(sw_status != SW_OK) 895 { 896 char tmpbuf[DECIMAL_SIZE(sw_status)+1]; 897 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_VERIFY,CSWIFT_R_REQUEST_FAILED); 898 sprintf(tmpbuf, "%ld", sw_status); 899 ERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf); 900 goto err; 901 } 902 /* Convert the response */ 903 to_return = ((sig_result == 0) ? 0 : 1); 904 905err: 906 if(acquired) 907 release_context(hac); 908 if(ctx) 909 { 910 BN_CTX_end(ctx); 911 BN_CTX_free(ctx); 912 } 913 return to_return; 914 } 915#endif 916 917#ifndef OPENSSL_NO_DH 918/* This function is aliased to mod_exp (with the dh and mont dropped). */ 919static int cswift_mod_exp_dh(const DH *dh, BIGNUM *r, 920 const BIGNUM *a, const BIGNUM *p, 921 const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx) 922 { 923 return cswift_mod_exp(r, a, p, m, ctx); 924 } 925#endif 926 927/* Random bytes are good */ 928static int cswift_rand_bytes(unsigned char *buf, int num) 929{ 930 SW_CONTEXT_HANDLE hac; 931 SW_STATUS swrc; 932 SW_LARGENUMBER largenum; 933 size_t nbytes = 0; 934 int acquired = 0; 935 int to_return = 0; /* assume failure */ 936 937 if (!get_context(&hac)) 938 { 939 CSWIFTerr(CSWIFT_F_CSWIFT_CTRL, CSWIFT_R_UNIT_FAILURE); 940 goto err; 941 } 942 acquired = 1; 943 944 while (nbytes < (size_t)num) 945 { 946 /* tell CryptoSwift how many bytes we want and where we want it. 947 * Note: - CryptoSwift cannot do more than 4096 bytes at a time. 948 * - CryptoSwift can only do multiple of 32-bits. */ 949 largenum.value = (SW_BYTE *) buf + nbytes; 950 if (4096 > num - nbytes) 951 largenum.nbytes = num - nbytes; 952 else 953 largenum.nbytes = 4096; 954 955 swrc = p_CSwift_SimpleRequest(hac, SW_CMD_RAND, NULL, 0, &largenum, 1); 956 if (swrc != SW_OK) 957 { 958 char tmpbuf[20]; 959 CSWIFTerr(CSWIFT_F_CSWIFT_CTRL, CSWIFT_R_REQUEST_FAILED); 960 sprintf(tmpbuf, "%ld", swrc); 961 ERR_add_error_data(2, "CryptoSwift error number is ", tmpbuf); 962 goto err; 963 } 964 965 nbytes += largenum.nbytes; 966 } 967 to_return = 1; /* success */ 968 969err: 970 if (acquired) 971 release_context(hac); 972 return to_return; 973} 974 975static int cswift_rand_status(void) 976{ 977 return 1; 978} 979 980 981/* This stuff is needed if this ENGINE is being compiled into a self-contained 982 * shared-library. */ 983#ifdef ENGINE_DYNAMIC_SUPPORT 984static int bind_fn(ENGINE *e, const char *id) 985 { 986 if(id && (strcmp(id, engine_cswift_id) != 0)) 987 return 0; 988 if(!bind_helper(e)) 989 return 0; 990 return 1; 991 } 992IMPLEMENT_DYNAMIC_CHECK_FN() 993IMPLEMENT_DYNAMIC_BIND_FN(bind_fn) 994#endif /* ENGINE_DYNAMIC_SUPPORT */ 995 996#endif /* !OPENSSL_NO_HW_CSWIFT */ 997#endif /* !OPENSSL_NO_HW */ 998