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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/* The definitions for control commands specific to this engine */
125#define CSWIFT_CMD_SO_PATH ENGINE_CMD_BASE
126static const ENGINE_CMD_DEFN cswift_cmd_defns[] = {
127 {CSWIFT_CMD_SO_PATH,
128 "SO_PATH",
129 "Specifies the path to the 'cswift' shared library",
130 ENGINE_CMD_FLAG_STRING},
131 {0, NULL, NULL, 0}
132 };
133
134#ifndef OPENSSL_NO_RSA
135/* Our internal RSA_METHOD that we provide pointers to */
136static RSA_METHOD cswift_rsa =
137 {
138 "CryptoSwift RSA method",
139 NULL,
140 NULL,
141 NULL,
142 NULL,
143 cswift_rsa_mod_exp,
144 cswift_mod_exp_mont,
145 NULL,
146 NULL,
147 0,
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 cswift_dsa =
157 {
158 "CryptoSwift DSA method",
159 cswift_dsa_sign,
160 NULL, /* dsa_sign_setup */
161 cswift_dsa_verify,
162 NULL, /* dsa_mod_exp */
163 NULL, /* bn_mod_exp */
164 NULL, /* init */
165 NULL, /* finish */
166 0, /* flags */
167 NULL /* app_data */
168 };
169#endif
170
171#ifndef OPENSSL_NO_DH
172/* Our internal DH_METHOD that we provide pointers to */
173static DH_METHOD cswift_dh =
174 {
175 "CryptoSwift DH method",
176 NULL,
177 NULL,
178 cswift_mod_exp_dh,
179 NULL,
180 NULL,
181 0,
182 NULL
183 };
184#endif
185
186/* Constants used when creating the ENGINE */
187static const char *engine_cswift_id = "cswift";
188static const char *engine_cswift_name = "CryptoSwift hardware engine support";
189
190/* This internal function is used by ENGINE_cswift() and possibly by the
191 * "dynamic" ENGINE support too */
192static int bind_helper(ENGINE *e)
193 {
194#ifndef OPENSSL_NO_RSA
195 const RSA_METHOD *meth1;
196#endif
197#ifndef OPENSSL_NO_DH
198 const DH_METHOD *meth2;
199#endif
200 if(!ENGINE_set_id(e, engine_cswift_id) ||
201 !ENGINE_set_name(e, engine_cswift_name) ||
202#ifndef OPENSSL_NO_RSA
203 !ENGINE_set_RSA(e, &cswift_rsa) ||
204#endif
205#ifndef OPENSSL_NO_DSA
206 !ENGINE_set_DSA(e, &cswift_dsa) ||
207#endif
208#ifndef OPENSSL_NO_DH
209 !ENGINE_set_DH(e, &cswift_dh) ||
210#endif
211 !ENGINE_set_destroy_function(e, cswift_destroy) ||
212 !ENGINE_set_init_function(e, cswift_init) ||
213 !ENGINE_set_finish_function(e, cswift_finish) ||
214 !ENGINE_set_ctrl_function(e, cswift_ctrl) ||
215 !ENGINE_set_cmd_defns(e, cswift_cmd_defns))
216 return 0;
217
218#ifndef OPENSSL_NO_RSA
219 /* We know that the "PKCS1_SSLeay()" functions hook properly
220 * to the cswift-specific mod_exp and mod_exp_crt so we use
221 * those functions. NB: We don't use ENGINE_openssl() or
222 * anything "more generic" because something like the RSAref
223 * code may not hook properly, and if you own one of these
224 * cards then you have the right to do RSA operations on it
225 * anyway! */
226 meth1 = RSA_PKCS1_SSLeay();
227 cswift_rsa.rsa_pub_enc = meth1->rsa_pub_enc;
228 cswift_rsa.rsa_pub_dec = meth1->rsa_pub_dec;
229 cswift_rsa.rsa_priv_enc = meth1->rsa_priv_enc;
230 cswift_rsa.rsa_priv_dec = meth1->rsa_priv_dec;
231#endif
232
233#ifndef OPENSSL_NO_DH
234 /* Much the same for Diffie-Hellman */
235 meth2 = DH_OpenSSL();
236 cswift_dh.generate_key = meth2->generate_key;
237 cswift_dh.compute_key = meth2->compute_key;
238#endif
239
240 /* Ensure the cswift error handling is set up */
241 ERR_load_CSWIFT_strings();
242 return 1;
243 }
244
245static ENGINE *engine_cswift(void)
246 {
247 ENGINE *ret = ENGINE_new();
248 if(!ret)
249 return NULL;
250 if(!bind_helper(ret))
251 {
252 ENGINE_free(ret);
253 return NULL;
254 }
255 return ret;
256 }
257
258void ENGINE_load_cswift(void)
259 {
260 /* Copied from eng_[openssl|dyn].c */
261 ENGINE *toadd = engine_cswift();
262 if(!toadd) return;
263 ENGINE_add(toadd);
264 ENGINE_free(toadd);
265 ERR_clear_error();
266 }
267
268/* This is a process-global DSO handle used for loading and unloading
269 * the CryptoSwift library. NB: This is only set (or unset) during an
270 * init() or finish() call (reference counts permitting) and they're
271 * operating with global locks, so this should be thread-safe
272 * implicitly. */
273static DSO *cswift_dso = NULL;
274
275/* These are the function pointers that are (un)set when the library has
276 * successfully (un)loaded. */
277t_swAcquireAccContext *p_CSwift_AcquireAccContext = NULL;
278t_swAttachKeyParam *p_CSwift_AttachKeyParam = NULL;
279t_swSimpleRequest *p_CSwift_SimpleRequest = NULL;
280t_swReleaseAccContext *p_CSwift_ReleaseAccContext = NULL;
281
282/* Used in the DSO operations. */
283static const char *CSWIFT_LIBNAME = NULL;
284static const char *get_CSWIFT_LIBNAME(void)
285 {
286 if(CSWIFT_LIBNAME)
287 return CSWIFT_LIBNAME;
288 return "swift";
289 }
290static void free_CSWIFT_LIBNAME(void)
291 {
292 if(CSWIFT_LIBNAME)
293 OPENSSL_free((void*)CSWIFT_LIBNAME);
294 CSWIFT_LIBNAME = NULL;
295 }
296static long set_CSWIFT_LIBNAME(const char *name)
297 {
298 free_CSWIFT_LIBNAME();
299 return (((CSWIFT_LIBNAME = BUF_strdup(name)) != NULL) ? 1 : 0);
300 }
301static const char *CSWIFT_F1 = "swAcquireAccContext";
302static const char *CSWIFT_F2 = "swAttachKeyParam";
303static const char *CSWIFT_F3 = "swSimpleRequest";
304static const char *CSWIFT_F4 = "swReleaseAccContext";
305
306
307/* CryptoSwift library functions and mechanics - these are used by the
308 * higher-level functions further down. NB: As and where there's no
309 * error checking, take a look lower down where these functions are
310 * called, the checking and error handling is probably down there. */
311
312/* utility function to obtain a context */
313static int get_context(SW_CONTEXT_HANDLE *hac)
314 {
315 SW_STATUS status;
316
317 status = p_CSwift_AcquireAccContext(hac);
318 if(status != SW_OK)
319 return 0;
320 return 1;
321 }
322
323/* similarly to release one. */
324static void release_context(SW_CONTEXT_HANDLE hac)
325 {
326 p_CSwift_ReleaseAccContext(hac);
327 }
328
329/* Destructor (complements the "ENGINE_cswift()" constructor) */
330static int cswift_destroy(ENGINE *e)
331 {
332 free_CSWIFT_LIBNAME();
333 ERR_unload_CSWIFT_strings();
334 return 1;
335 }
336
337/* (de)initialisation functions. */
338static int cswift_init(ENGINE *e)
339 {
340 SW_CONTEXT_HANDLE hac;
341 t_swAcquireAccContext *p1;
342 t_swAttachKeyParam *p2;
343 t_swSimpleRequest *p3;
344 t_swReleaseAccContext *p4;
345
346 if(cswift_dso != NULL)
347 {
348 CSWIFTerr(CSWIFT_F_CSWIFT_INIT,CSWIFT_R_ALREADY_LOADED);
349 goto err;
350 }
351 /* Attempt to load libswift.so/swift.dll/whatever. */
352 cswift_dso = DSO_load(NULL, get_CSWIFT_LIBNAME(), NULL, 0);
353 if(cswift_dso == NULL)
354 {
355 CSWIFTerr(CSWIFT_F_CSWIFT_INIT,CSWIFT_R_NOT_LOADED);
356 goto err;
357 }
358 if(!(p1 = (t_swAcquireAccContext *)
359 DSO_bind_func(cswift_dso, CSWIFT_F1)) ||
360 !(p2 = (t_swAttachKeyParam *)
361 DSO_bind_func(cswift_dso, CSWIFT_F2)) ||
362 !(p3 = (t_swSimpleRequest *)
363 DSO_bind_func(cswift_dso, CSWIFT_F3)) ||
364 !(p4 = (t_swReleaseAccContext *)
365 DSO_bind_func(cswift_dso, CSWIFT_F4)))
366 {
367 CSWIFTerr(CSWIFT_F_CSWIFT_INIT,CSWIFT_R_NOT_LOADED);
368 goto err;
369 }
370 /* Copy the pointers */
371 p_CSwift_AcquireAccContext = p1;
372 p_CSwift_AttachKeyParam = p2;
373 p_CSwift_SimpleRequest = p3;
374 p_CSwift_ReleaseAccContext = p4;
375 /* Try and get a context - if not, we may have a DSO but no
376 * accelerator! */
377 if(!get_context(&hac))
378 {
379 CSWIFTerr(CSWIFT_F_CSWIFT_INIT,CSWIFT_R_UNIT_FAILURE);
380 goto err;
381 }
382 release_context(hac);
383 /* Everything's fine. */
384 return 1;
385err:
386 if(cswift_dso)
387 DSO_free(cswift_dso);
388 p_CSwift_AcquireAccContext = NULL;
389 p_CSwift_AttachKeyParam = NULL;
390 p_CSwift_SimpleRequest = NULL;
391 p_CSwift_ReleaseAccContext = NULL;
392 return 0;
393 }
394
395static int cswift_finish(ENGINE *e)
396 {
397 free_CSWIFT_LIBNAME();
398 if(cswift_dso == NULL)
399 {
400 CSWIFTerr(CSWIFT_F_CSWIFT_FINISH,CSWIFT_R_NOT_LOADED);
401 return 0;
402 }
403 if(!DSO_free(cswift_dso))
404 {
405 CSWIFTerr(CSWIFT_F_CSWIFT_FINISH,CSWIFT_R_UNIT_FAILURE);
406 return 0;
407 }
408 cswift_dso = NULL;
409 p_CSwift_AcquireAccContext = NULL;
410 p_CSwift_AttachKeyParam = NULL;
411 p_CSwift_SimpleRequest = NULL;
412 p_CSwift_ReleaseAccContext = NULL;
413 return 1;
414 }
415
416static int cswift_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f)())
417 {
418 int initialised = ((cswift_dso == NULL) ? 0 : 1);
419 switch(cmd)
420 {
421 case CSWIFT_CMD_SO_PATH:
422 if(p == NULL)
423 {
424 CSWIFTerr(CSWIFT_F_CSWIFT_CTRL,ERR_R_PASSED_NULL_PARAMETER);
425 return 0;
426 }
427 if(initialised)
428 {
429 CSWIFTerr(CSWIFT_F_CSWIFT_CTRL,CSWIFT_R_ALREADY_LOADED);
430 return 0;
431 }
432 return set_CSWIFT_LIBNAME((const char *)p);
433 default:
434 break;
435 }
436 CSWIFTerr(CSWIFT_F_CSWIFT_CTRL,CSWIFT_R_CTRL_COMMAND_NOT_IMPLEMENTED);
437 return 0;
438 }
439
440/* Un petit mod_exp */
441static int cswift_mod_exp(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
442 const BIGNUM *m, BN_CTX *ctx)
443 {
444 /* I need somewhere to store temporary serialised values for
445 * use with the CryptoSwift API calls. A neat cheat - I'll use
446 * BIGNUMs from the BN_CTX but access their arrays directly as
447 * byte arrays <grin>. This way I don't have to clean anything
448 * up. */
449 BIGNUM *modulus;
450 BIGNUM *exponent;
451 BIGNUM *argument;
452 BIGNUM *result;
453 SW_STATUS sw_status;
454 SW_LARGENUMBER arg, res;
455 SW_PARAM sw_param;
456 SW_CONTEXT_HANDLE hac;
457 int to_return, acquired;
458
459 modulus = exponent = argument = result = NULL;
460 to_return = 0; /* expect failure */
461 acquired = 0;
462
463 if(!get_context(&hac))
464 {
465 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP,CSWIFT_R_UNIT_FAILURE);
466 goto err;
467 }
468 acquired = 1;
469 /* Prepare the params */
470 BN_CTX_start(ctx);
471 modulus = BN_CTX_get(ctx);
472 exponent = BN_CTX_get(ctx);
473 argument = BN_CTX_get(ctx);
474 result = BN_CTX_get(ctx);
475 if(!result)
476 {
477 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP,CSWIFT_R_BN_CTX_FULL);
478 goto err;
479 }
480 if(!bn_wexpand(modulus, m->top) || !bn_wexpand(exponent, p->top) ||
481 !bn_wexpand(argument, a->top) || !bn_wexpand(result, m->top))
482 {
483 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP,CSWIFT_R_BN_EXPAND_FAIL);
484 goto err;
485 }
486 sw_param.type = SW_ALG_EXP;
487 sw_param.up.exp.modulus.nbytes = BN_bn2bin(m,
488 (unsigned char *)modulus->d);
489 sw_param.up.exp.modulus.value = (unsigned char *)modulus->d;
490 sw_param.up.exp.exponent.nbytes = BN_bn2bin(p,
491 (unsigned char *)exponent->d);
492 sw_param.up.exp.exponent.value = (unsigned char *)exponent->d;
493 /* Attach the key params */
494 sw_status = p_CSwift_AttachKeyParam(hac, &sw_param);
495 switch(sw_status)
496 {
497 case SW_OK:
498 break;
499 case SW_ERR_INPUT_SIZE:
500 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP,CSWIFT_R_BAD_KEY_SIZE);
501 goto err;
502 default:
503 {
504 char tmpbuf[DECIMAL_SIZE(sw_status)+1];
505 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP,CSWIFT_R_REQUEST_FAILED);
506 sprintf(tmpbuf, "%ld", sw_status);
507 ERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf);
508 }
509 goto err;
510 }
511 /* Prepare the argument and response */
512 arg.nbytes = BN_bn2bin(a, (unsigned char *)argument->d);
513 arg.value = (unsigned char *)argument->d;
514 res.nbytes = BN_num_bytes(m);
515 memset(result->d, 0, res.nbytes);
516 res.value = (unsigned char *)result->d;
517 /* Perform the operation */
518 if((sw_status = p_CSwift_SimpleRequest(hac, SW_CMD_MODEXP, &arg, 1,
519 &res, 1)) != SW_OK)
520 {
521 char tmpbuf[DECIMAL_SIZE(sw_status)+1];
522 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP,CSWIFT_R_REQUEST_FAILED);
523 sprintf(tmpbuf, "%ld", sw_status);
524 ERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf);
525 goto err;
526 }
527 /* Convert the response */
528 BN_bin2bn((unsigned char *)result->d, res.nbytes, r);
529 to_return = 1;
530err:
531 if(acquired)
532 release_context(hac);
533 BN_CTX_end(ctx);
534 return to_return;
535 }
536
537/* Un petit mod_exp chinois */
538static int cswift_mod_exp_crt(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
539 const BIGNUM *q, const BIGNUM *dmp1,
540 const BIGNUM *dmq1, const BIGNUM *iqmp, BN_CTX *ctx)
541 {
542 SW_STATUS sw_status;
543 SW_LARGENUMBER arg, res;
544 SW_PARAM sw_param;
545 SW_CONTEXT_HANDLE hac;
546 BIGNUM *rsa_p = NULL;
547 BIGNUM *rsa_q = NULL;
548 BIGNUM *rsa_dmp1 = NULL;
549 BIGNUM *rsa_dmq1 = NULL;
550 BIGNUM *rsa_iqmp = NULL;
551 BIGNUM *argument = NULL;
552 BIGNUM *result = NULL;
553 int to_return = 0; /* expect failure */
554 int acquired = 0;
555
556 if(!get_context(&hac))
557 {
558 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP_CRT,CSWIFT_R_UNIT_FAILURE);
559 goto err;
560 }
561 acquired = 1;
562 /* Prepare the params */
563 BN_CTX_start(ctx);
564 rsa_p = BN_CTX_get(ctx);
565 rsa_q = BN_CTX_get(ctx);
566 rsa_dmp1 = BN_CTX_get(ctx);
567 rsa_dmq1 = BN_CTX_get(ctx);
568 rsa_iqmp = BN_CTX_get(ctx);
569 argument = BN_CTX_get(ctx);
570 result = BN_CTX_get(ctx);
571 if(!result)
572 {
573 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP_CRT,CSWIFT_R_BN_CTX_FULL);
574 goto err;
575 }
576 if(!bn_wexpand(rsa_p, p->top) || !bn_wexpand(rsa_q, q->top) ||
577 !bn_wexpand(rsa_dmp1, dmp1->top) ||
578 !bn_wexpand(rsa_dmq1, dmq1->top) ||
579 !bn_wexpand(rsa_iqmp, iqmp->top) ||
580 !bn_wexpand(argument, a->top) ||
581 !bn_wexpand(result, p->top + q->top))
582 {
583 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP_CRT,CSWIFT_R_BN_EXPAND_FAIL);
584 goto err;
585 }
586 sw_param.type = SW_ALG_CRT;
587 sw_param.up.crt.p.nbytes = BN_bn2bin(p, (unsigned char *)rsa_p->d);
588 sw_param.up.crt.p.value = (unsigned char *)rsa_p->d;
589 sw_param.up.crt.q.nbytes = BN_bn2bin(q, (unsigned char *)rsa_q->d);
590 sw_param.up.crt.q.value = (unsigned char *)rsa_q->d;
591 sw_param.up.crt.dmp1.nbytes = BN_bn2bin(dmp1,
592 (unsigned char *)rsa_dmp1->d);
593 sw_param.up.crt.dmp1.value = (unsigned char *)rsa_dmp1->d;
594 sw_param.up.crt.dmq1.nbytes = BN_bn2bin(dmq1,
595 (unsigned char *)rsa_dmq1->d);
596 sw_param.up.crt.dmq1.value = (unsigned char *)rsa_dmq1->d;
597 sw_param.up.crt.iqmp.nbytes = BN_bn2bin(iqmp,
598 (unsigned char *)rsa_iqmp->d);
599 sw_param.up.crt.iqmp.value = (unsigned char *)rsa_iqmp->d;
600 /* Attach the key params */
601 sw_status = p_CSwift_AttachKeyParam(hac, &sw_param);
602 switch(sw_status)
603 {
604 case SW_OK:
605 break;
606 case SW_ERR_INPUT_SIZE:
607 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP_CRT,CSWIFT_R_BAD_KEY_SIZE);
608 goto err;
609 default:
610 {
611 char tmpbuf[DECIMAL_SIZE(sw_status)+1];
612 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP_CRT,CSWIFT_R_REQUEST_FAILED);
613 sprintf(tmpbuf, "%ld", sw_status);
614 ERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf);
615 }
616 goto err;
617 }
618 /* Prepare the argument and response */
619 arg.nbytes = BN_bn2bin(a, (unsigned char *)argument->d);
620 arg.value = (unsigned char *)argument->d;
621 res.nbytes = 2 * BN_num_bytes(p);
622 memset(result->d, 0, res.nbytes);
623 res.value = (unsigned char *)result->d;
624 /* Perform the operation */
625 if((sw_status = p_CSwift_SimpleRequest(hac, SW_CMD_MODEXP_CRT, &arg, 1,
626 &res, 1)) != SW_OK)
627 {
628 char tmpbuf[DECIMAL_SIZE(sw_status)+1];
629 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP_CRT,CSWIFT_R_REQUEST_FAILED);
630 sprintf(tmpbuf, "%ld", sw_status);
631 ERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf);
632 goto err;
633 }
634 /* Convert the response */
635 BN_bin2bn((unsigned char *)result->d, res.nbytes, r);
636 to_return = 1;
637err:
638 if(acquired)
639 release_context(hac);
640 BN_CTX_end(ctx);
641 return to_return;
642 }
643
644#ifndef OPENSSL_NO_RSA
645static int cswift_rsa_mod_exp(BIGNUM *r0, const BIGNUM *I, RSA *rsa)
646 {
647 BN_CTX *ctx;
648 int to_return = 0;
649
650 if((ctx = BN_CTX_new()) == NULL)
651 goto err;
652 if(!rsa->p || !rsa->q || !rsa->dmp1 || !rsa->dmq1 || !rsa->iqmp)
653 {
654 CSWIFTerr(CSWIFT_F_CSWIFT_RSA_MOD_EXP,CSWIFT_R_MISSING_KEY_COMPONENTS);
655 goto err;
656 }
657 to_return = cswift_mod_exp_crt(r0, I, rsa->p, rsa->q, rsa->dmp1,
658 rsa->dmq1, rsa->iqmp, ctx);
659err:
660 if(ctx)
661 BN_CTX_free(ctx);
662 return to_return;
663 }
664#endif
665
666/* This function is aliased to mod_exp (with the mont stuff dropped). */
667static int cswift_mod_exp_mont(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
668 const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx)
669 {
670 return cswift_mod_exp(r, a, p, m, ctx);
671 }
672
673#ifndef OPENSSL_NO_DSA
674static DSA_SIG *cswift_dsa_sign(const unsigned char *dgst, int dlen, DSA *dsa)
675 {
676 SW_CONTEXT_HANDLE hac;
677 SW_PARAM sw_param;
678 SW_STATUS sw_status;
679 SW_LARGENUMBER arg, res;
680 unsigned char *ptr;
681 BN_CTX *ctx;
682 BIGNUM *dsa_p = NULL;
683 BIGNUM *dsa_q = NULL;
684 BIGNUM *dsa_g = NULL;
685 BIGNUM *dsa_key = NULL;
686 BIGNUM *result = NULL;
687 DSA_SIG *to_return = NULL;
688 int acquired = 0;
689
690 if((ctx = BN_CTX_new()) == NULL)
691 goto err;
692 if(!get_context(&hac))
693 {
694 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_SIGN,CSWIFT_R_UNIT_FAILURE);
695 goto err;
696 }
697 acquired = 1;
698 /* Prepare the params */
699 BN_CTX_start(ctx);
700 dsa_p = BN_CTX_get(ctx);
701 dsa_q = BN_CTX_get(ctx);
702 dsa_g = BN_CTX_get(ctx);
703 dsa_key = BN_CTX_get(ctx);
704 result = BN_CTX_get(ctx);
705 if(!result)
706 {
707 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_SIGN,CSWIFT_R_BN_CTX_FULL);
708 goto err;
709 }
710 if(!bn_wexpand(dsa_p, dsa->p->top) ||
711 !bn_wexpand(dsa_q, dsa->q->top) ||
712 !bn_wexpand(dsa_g, dsa->g->top) ||
713 !bn_wexpand(dsa_key, dsa->priv_key->top) ||
714 !bn_wexpand(result, dsa->p->top))
715 {
716 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_SIGN,CSWIFT_R_BN_EXPAND_FAIL);
717 goto err;
718 }
719 sw_param.type = SW_ALG_DSA;
720 sw_param.up.dsa.p.nbytes = BN_bn2bin(dsa->p,
721 (unsigned char *)dsa_p->d);
722 sw_param.up.dsa.p.value = (unsigned char *)dsa_p->d;
723 sw_param.up.dsa.q.nbytes = BN_bn2bin(dsa->q,
724 (unsigned char *)dsa_q->d);
725 sw_param.up.dsa.q.value = (unsigned char *)dsa_q->d;
726 sw_param.up.dsa.g.nbytes = BN_bn2bin(dsa->g,
727 (unsigned char *)dsa_g->d);
728 sw_param.up.dsa.g.value = (unsigned char *)dsa_g->d;
729 sw_param.up.dsa.key.nbytes = BN_bn2bin(dsa->priv_key,
730 (unsigned char *)dsa_key->d);
731 sw_param.up.dsa.key.value = (unsigned char *)dsa_key->d;
732 /* Attach the key params */
733 sw_status = p_CSwift_AttachKeyParam(hac, &sw_param);
734 switch(sw_status)
735 {
736 case SW_OK:
737 break;
738 case SW_ERR_INPUT_SIZE:
739 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_SIGN,CSWIFT_R_BAD_KEY_SIZE);
740 goto err;
741 default:
742 {
743 char tmpbuf[DECIMAL_SIZE(sw_status)+1];
744 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_SIGN,CSWIFT_R_REQUEST_FAILED);
745 sprintf(tmpbuf, "%ld", sw_status);
746 ERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf);
747 }
748 goto err;
749 }
750 /* Prepare the argument and response */
751 arg.nbytes = dlen;
752 arg.value = (unsigned char *)dgst;
753 res.nbytes = BN_num_bytes(dsa->p);
754 memset(result->d, 0, res.nbytes);
755 res.value = (unsigned char *)result->d;
756 /* Perform the operation */
757 sw_status = p_CSwift_SimpleRequest(hac, SW_CMD_DSS_SIGN, &arg, 1,
758 &res, 1);
759 if(sw_status != SW_OK)
760 {
761 char tmpbuf[DECIMAL_SIZE(sw_status)+1];
762 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_SIGN,CSWIFT_R_REQUEST_FAILED);
763 sprintf(tmpbuf, "%ld", sw_status);
764 ERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf);
765 goto err;
766 }
767 /* Convert the response */
768 ptr = (unsigned char *)result->d;
769 if((to_return = DSA_SIG_new()) == NULL)
770 goto err;
771 to_return->r = BN_bin2bn((unsigned char *)result->d, 20, NULL);
772 to_return->s = BN_bin2bn((unsigned char *)result->d + 20, 20, NULL);
773
774err:
775 if(acquired)
776 release_context(hac);
777 if(ctx)
778 {
779 BN_CTX_end(ctx);
780 BN_CTX_free(ctx);
781 }
782 return to_return;
783 }
784
785static int cswift_dsa_verify(const unsigned char *dgst, int dgst_len,
786 DSA_SIG *sig, DSA *dsa)
787 {
788 SW_CONTEXT_HANDLE hac;
789 SW_PARAM sw_param;
790 SW_STATUS sw_status;
791 SW_LARGENUMBER arg[2], res;
792 unsigned long sig_result;
793 BN_CTX *ctx;
794 BIGNUM *dsa_p = NULL;
795 BIGNUM *dsa_q = NULL;
796 BIGNUM *dsa_g = NULL;
797 BIGNUM *dsa_key = NULL;
798 BIGNUM *argument = NULL;
799 int to_return = -1;
800 int acquired = 0;
801
802 if((ctx = BN_CTX_new()) == NULL)
803 goto err;
804 if(!get_context(&hac))
805 {
806 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_VERIFY,CSWIFT_R_UNIT_FAILURE);
807 goto err;
808 }
809 acquired = 1;
810 /* Prepare the params */
811 BN_CTX_start(ctx);
812 dsa_p = BN_CTX_get(ctx);
813 dsa_q = BN_CTX_get(ctx);
814 dsa_g = BN_CTX_get(ctx);
815 dsa_key = BN_CTX_get(ctx);
816 argument = BN_CTX_get(ctx);
817 if(!argument)
818 {
819 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_VERIFY,CSWIFT_R_BN_CTX_FULL);
820 goto err;
821 }
822 if(!bn_wexpand(dsa_p, dsa->p->top) ||
823 !bn_wexpand(dsa_q, dsa->q->top) ||
824 !bn_wexpand(dsa_g, dsa->g->top) ||
825 !bn_wexpand(dsa_key, dsa->pub_key->top) ||
826 !bn_wexpand(argument, 40))
827 {
828 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_VERIFY,CSWIFT_R_BN_EXPAND_FAIL);
829 goto err;
830 }
831 sw_param.type = SW_ALG_DSA;
832 sw_param.up.dsa.p.nbytes = BN_bn2bin(dsa->p,
833 (unsigned char *)dsa_p->d);
834 sw_param.up.dsa.p.value = (unsigned char *)dsa_p->d;
835 sw_param.up.dsa.q.nbytes = BN_bn2bin(dsa->q,
836 (unsigned char *)dsa_q->d);
837 sw_param.up.dsa.q.value = (unsigned char *)dsa_q->d;
838 sw_param.up.dsa.g.nbytes = BN_bn2bin(dsa->g,
839 (unsigned char *)dsa_g->d);
840 sw_param.up.dsa.g.value = (unsigned char *)dsa_g->d;
841 sw_param.up.dsa.key.nbytes = BN_bn2bin(dsa->pub_key,
842 (unsigned char *)dsa_key->d);
843 sw_param.up.dsa.key.value = (unsigned char *)dsa_key->d;
844 /* Attach the key params */
845 sw_status = p_CSwift_AttachKeyParam(hac, &sw_param);
846 switch(sw_status)
847 {
848 case SW_OK:
849 break;
850 case SW_ERR_INPUT_SIZE:
851 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_VERIFY,CSWIFT_R_BAD_KEY_SIZE);
852 goto err;
853 default:
854 {
855 char tmpbuf[DECIMAL_SIZE(sw_status)+1];
856 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_VERIFY,CSWIFT_R_REQUEST_FAILED);
857 sprintf(tmpbuf, "%ld", sw_status);
858 ERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf);
859 }
860 goto err;
861 }
862 /* Prepare the argument and response */
863 arg[0].nbytes = dgst_len;
864 arg[0].value = (unsigned char *)dgst;
865 arg[1].nbytes = 40;
866 arg[1].value = (unsigned char *)argument->d;
867 memset(arg[1].value, 0, 40);
868 BN_bn2bin(sig->r, arg[1].value + 20 - BN_num_bytes(sig->r));
869 BN_bn2bin(sig->s, arg[1].value + 40 - BN_num_bytes(sig->s));
870 res.nbytes = 4; /* unsigned long */
871 res.value = (unsigned char *)(&sig_result);
872 /* Perform the operation */
873 sw_status = p_CSwift_SimpleRequest(hac, SW_CMD_DSS_VERIFY, arg, 2,
874 &res, 1);
875 if(sw_status != SW_OK)
876 {
877 char tmpbuf[DECIMAL_SIZE(sw_status)+1];
878 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_VERIFY,CSWIFT_R_REQUEST_FAILED);
879 sprintf(tmpbuf, "%ld", sw_status);
880 ERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf);
881 goto err;
882 }
883 /* Convert the response */
884 to_return = ((sig_result == 0) ? 0 : 1);
885
886err:
887 if(acquired)
888 release_context(hac);
889 if(ctx)
890 {
891 BN_CTX_end(ctx);
892 BN_CTX_free(ctx);
893 }
894 return to_return;
895 }
896#endif
897
898#ifndef OPENSSL_NO_DH
899/* This function is aliased to mod_exp (with the dh and mont dropped). */
900static int cswift_mod_exp_dh(const DH *dh, BIGNUM *r,
901 const BIGNUM *a, const BIGNUM *p,
902 const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx)
903 {
904 return cswift_mod_exp(r, a, p, m, ctx);
905 }
906#endif
907
908/* This stuff is needed if this ENGINE is being compiled into a self-contained
909 * shared-library. */
910#ifdef ENGINE_DYNAMIC_SUPPORT
911static int bind_fn(ENGINE *e, const char *id)
912 {
913 if(id && (strcmp(id, engine_cswift_id) != 0))
914 return 0;
915 if(!bind_helper(e))
916 return 0;
917 return 1;
918 }
919IMPLEMENT_DYNAMIC_CHECK_FN()
920IMPLEMENT_DYNAMIC_BIND_FN(bind_fn)
921#endif /* ENGINE_DYNAMIC_SUPPORT */
922
923#endif /* !OPENSSL_NO_HW_CSWIFT */
924#endif /* !OPENSSL_NO_HW */
generated by cgit v1.2.3-55-g6feb (git 2.39.1) at 2025-12-03 16:10:50 +0000