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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 <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/rand.h>
75#include <openssl/bn.h>
76
77#ifndef OPENSSL_NO_HW
78#ifndef OPENSSL_NO_HW_CSWIFT
79
80/* Attribution notice: Rainbow have generously allowed me to reproduce
81 * the necessary definitions here from their API. This means the support
82 * can build independently of whether application builders have the
83 * API or hardware. This will allow developers to easily produce software
84 * that has latent hardware support for any users that have accelerators
85 * installed, without the developers themselves needing anything extra.
86 *
87 * I have only clipped the parts from the CryptoSwift header files that
88 * are (or seem) relevant to the CryptoSwift support code. This is
89 * simply to keep the file sizes reasonable.
90 * [Geoff]
91 */
92#ifdef FLAT_INC
93#include "cswift.h"
94#else
95#include "vendor_defns/cswift.h"
96#endif
97
98#define CSWIFT_LIB_NAME "cswift engine"
99#include "e_cswift_err.c"
100
101#define DECIMAL_SIZE(type) ((sizeof(type)*8+2)/3+1)
102
103static int cswift_destroy(ENGINE *e);
104static int cswift_init(ENGINE *e);
105static int cswift_finish(ENGINE *e);
106static int cswift_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f)(void));
107#ifndef OPENSSL_NO_RSA
108static int cswift_bn_32copy(SW_LARGENUMBER * out, const BIGNUM * in);
109#endif
110
111/* BIGNUM stuff */
112static int cswift_mod_exp(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
113 const BIGNUM *m, BN_CTX *ctx);
114#ifndef OPENSSL_NO_RSA
115static int cswift_mod_exp_crt(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
116 const BIGNUM *q, const BIGNUM *dmp1, const BIGNUM *dmq1,
117 const BIGNUM *iqmp, BN_CTX *ctx);
118#endif
119
120#ifndef OPENSSL_NO_RSA
121/* RSA stuff */
122static int cswift_rsa_mod_exp(BIGNUM *r0, const BIGNUM *I, RSA *rsa, BN_CTX *ctx);
123/* This function is aliased to mod_exp (with the mont stuff dropped). */
124static int cswift_mod_exp_mont(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
125 const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx);
126#endif
127
128#ifndef OPENSSL_NO_DSA
129/* DSA stuff */
130static DSA_SIG *cswift_dsa_sign(const unsigned char *dgst, int dlen, DSA *dsa);
131static int cswift_dsa_verify(const unsigned char *dgst, int dgst_len,
132 DSA_SIG *sig, DSA *dsa);
133#endif
134
135#ifndef OPENSSL_NO_DH
136/* DH stuff */
137/* This function is alised to mod_exp (with the DH and mont dropped). */
138static int cswift_mod_exp_dh(const DH *dh, BIGNUM *r,
139 const BIGNUM *a, const BIGNUM *p,
140 const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx);
141#endif
142
143/* RAND stuff */
144static int cswift_rand_bytes(unsigned char *buf, int num);
145static int cswift_rand_status(void);
146
147/* The definitions for control commands specific to this engine */
148#define CSWIFT_CMD_SO_PATH ENGINE_CMD_BASE
149static const ENGINE_CMD_DEFN cswift_cmd_defns[] = {
150 {CSWIFT_CMD_SO_PATH,
151 "SO_PATH",
152 "Specifies the path to the 'cswift' shared library",
153 ENGINE_CMD_FLAG_STRING},
154 {0, NULL, NULL, 0}
155 };
156
157#ifndef OPENSSL_NO_RSA
158/* Our internal RSA_METHOD that we provide pointers to */
159static RSA_METHOD cswift_rsa =
160 {
161 "CryptoSwift RSA method",
162 NULL,
163 NULL,
164 NULL,
165 NULL,
166 cswift_rsa_mod_exp,
167 cswift_mod_exp_mont,
168 NULL,
169 NULL,
170 0,
171 NULL,
172 NULL,
173 NULL,
174 NULL
175 };
176#endif
177
178#ifndef OPENSSL_NO_DSA
179/* Our internal DSA_METHOD that we provide pointers to */
180static DSA_METHOD cswift_dsa =
181 {
182 "CryptoSwift DSA method",
183 cswift_dsa_sign,
184 NULL, /* dsa_sign_setup */
185 cswift_dsa_verify,
186 NULL, /* dsa_mod_exp */
187 NULL, /* bn_mod_exp */
188 NULL, /* init */
189 NULL, /* finish */
190 0, /* flags */
191 NULL, /* app_data */
192 NULL, /* dsa_paramgen */
193 NULL /* dsa_keygen */
194 };
195#endif
196
197#ifndef OPENSSL_NO_DH
198/* Our internal DH_METHOD that we provide pointers to */
199static DH_METHOD cswift_dh =
200 {
201 "CryptoSwift DH method",
202 NULL,
203 NULL,
204 cswift_mod_exp_dh,
205 NULL,
206 NULL,
207 0,
208 NULL,
209 NULL
210 };
211#endif
212
213static RAND_METHOD cswift_random =
214 {
215 /* "CryptoSwift RAND method", */
216 NULL,
217 cswift_rand_bytes,
218 NULL,
219 NULL,
220 cswift_rand_bytes,
221 cswift_rand_status,
222 };
223
224
225/* Constants used when creating the ENGINE */
226static const char *engine_cswift_id = "cswift";
227static const char *engine_cswift_name = "CryptoSwift hardware engine support";
228
229/* This internal function is used by ENGINE_cswift() and possibly by the
230 * "dynamic" ENGINE support too */
231static int bind_helper(ENGINE *e)
232 {
233#ifndef OPENSSL_NO_RSA
234 const RSA_METHOD *meth1;
235#endif
236#ifndef OPENSSL_NO_DH
237 const DH_METHOD *meth2;
238#endif
239 if(!ENGINE_set_id(e, engine_cswift_id) ||
240 !ENGINE_set_name(e, engine_cswift_name) ||
241#ifndef OPENSSL_NO_RSA
242 !ENGINE_set_RSA(e, &cswift_rsa) ||
243#endif
244#ifndef OPENSSL_NO_DSA
245 !ENGINE_set_DSA(e, &cswift_dsa) ||
246#endif
247#ifndef OPENSSL_NO_DH
248 !ENGINE_set_DH(e, &cswift_dh) ||
249#endif
250 !ENGINE_set_RAND(e, &cswift_random) ||
251 !ENGINE_set_destroy_function(e, cswift_destroy) ||
252 !ENGINE_set_init_function(e, cswift_init) ||
253 !ENGINE_set_finish_function(e, cswift_finish) ||
254 !ENGINE_set_ctrl_function(e, cswift_ctrl) ||
255 !ENGINE_set_cmd_defns(e, cswift_cmd_defns))
256 return 0;
257
258#ifndef OPENSSL_NO_RSA
259 /* We know that the "PKCS1_SSLeay()" functions hook properly
260 * to the cswift-specific mod_exp and mod_exp_crt so we use
261 * those functions. NB: We don't use ENGINE_openssl() or
262 * anything "more generic" because something like the RSAref
263 * code may not hook properly, and if you own one of these
264 * cards then you have the right to do RSA operations on it
265 * anyway! */
266 meth1 = RSA_PKCS1_SSLeay();
267 cswift_rsa.rsa_pub_enc = meth1->rsa_pub_enc;
268 cswift_rsa.rsa_pub_dec = meth1->rsa_pub_dec;
269 cswift_rsa.rsa_priv_enc = meth1->rsa_priv_enc;
270 cswift_rsa.rsa_priv_dec = meth1->rsa_priv_dec;
271#endif
272
273#ifndef OPENSSL_NO_DH
274 /* Much the same for Diffie-Hellman */
275 meth2 = DH_OpenSSL();
276 cswift_dh.generate_key = meth2->generate_key;
277 cswift_dh.compute_key = meth2->compute_key;
278#endif
279
280 /* Ensure the cswift error handling is set up */
281 ERR_load_CSWIFT_strings();
282 return 1;
283 }
284
285#ifdef OPENSSL_NO_DYNAMIC_ENGINE
286static ENGINE *engine_cswift(void)
287 {
288 ENGINE *ret = ENGINE_new();
289 if(!ret)
290 return NULL;
291 if(!bind_helper(ret))
292 {
293 ENGINE_free(ret);
294 return NULL;
295 }
296 return ret;
297 }
298
299void ENGINE_load_cswift(void)
300 {
301 /* Copied from eng_[openssl|dyn].c */
302 ENGINE *toadd = engine_cswift();
303 if(!toadd) return;
304 ENGINE_add(toadd);
305 ENGINE_free(toadd);
306 ERR_clear_error();
307 }
308#endif
309
310/* This is a process-global DSO handle used for loading and unloading
311 * the CryptoSwift library. NB: This is only set (or unset) during an
312 * init() or finish() call (reference counts permitting) and they're
313 * operating with global locks, so this should be thread-safe
314 * implicitly. */
315static DSO *cswift_dso = NULL;
316
317/* These are the function pointers that are (un)set when the library has
318 * successfully (un)loaded. */
319t_swAcquireAccContext *p_CSwift_AcquireAccContext = NULL;
320t_swAttachKeyParam *p_CSwift_AttachKeyParam = NULL;
321t_swSimpleRequest *p_CSwift_SimpleRequest = NULL;
322t_swReleaseAccContext *p_CSwift_ReleaseAccContext = NULL;
323
324/* Used in the DSO operations. */
325static const char *CSWIFT_LIBNAME = NULL;
326static const char *get_CSWIFT_LIBNAME(void)
327 {
328 if(CSWIFT_LIBNAME)
329 return CSWIFT_LIBNAME;
330 return "swift";
331 }
332static void free_CSWIFT_LIBNAME(void)
333 {
334 if(CSWIFT_LIBNAME)
335 OPENSSL_free((void*)CSWIFT_LIBNAME);
336 CSWIFT_LIBNAME = NULL;
337 }
338static long set_CSWIFT_LIBNAME(const char *name)
339 {
340 free_CSWIFT_LIBNAME();
341 return (((CSWIFT_LIBNAME = BUF_strdup(name)) != NULL) ? 1 : 0);
342 }
343static const char *CSWIFT_F1 = "swAcquireAccContext";
344static const char *CSWIFT_F2 = "swAttachKeyParam";
345static const char *CSWIFT_F3 = "swSimpleRequest";
346static const char *CSWIFT_F4 = "swReleaseAccContext";
347
348
349/* CryptoSwift library functions and mechanics - these are used by the
350 * higher-level functions further down. NB: As and where there's no
351 * error checking, take a look lower down where these functions are
352 * called, the checking and error handling is probably down there. */
353
354/* utility function to obtain a context */
355static int get_context(SW_CONTEXT_HANDLE *hac)
356 {
357 SW_STATUS status;
358
359 status = p_CSwift_AcquireAccContext(hac);
360 if(status != SW_OK)
361 return 0;
362 return 1;
363 }
364
365/* similarly to release one. */
366static void release_context(SW_CONTEXT_HANDLE hac)
367 {
368 p_CSwift_ReleaseAccContext(hac);
369 }
370
371/* Destructor (complements the "ENGINE_cswift()" constructor) */
372static int cswift_destroy(ENGINE *e)
373 {
374 free_CSWIFT_LIBNAME();
375 ERR_unload_CSWIFT_strings();
376 return 1;
377 }
378
379/* (de)initialisation functions. */
380static int cswift_init(ENGINE *e)
381 {
382 SW_CONTEXT_HANDLE hac;
383 t_swAcquireAccContext *p1;
384 t_swAttachKeyParam *p2;
385 t_swSimpleRequest *p3;
386 t_swReleaseAccContext *p4;
387
388 if(cswift_dso != NULL)
389 {
390 CSWIFTerr(CSWIFT_F_CSWIFT_INIT,CSWIFT_R_ALREADY_LOADED);
391 goto err;
392 }
393 /* Attempt to load libswift.so/swift.dll/whatever. */
394 cswift_dso = DSO_load(NULL, get_CSWIFT_LIBNAME(), NULL, 0);
395 if(cswift_dso == NULL)
396 {
397 CSWIFTerr(CSWIFT_F_CSWIFT_INIT,CSWIFT_R_NOT_LOADED);
398 goto err;
399 }
400 if(!(p1 = (t_swAcquireAccContext *)
401 DSO_bind_func(cswift_dso, CSWIFT_F1)) ||
402 !(p2 = (t_swAttachKeyParam *)
403 DSO_bind_func(cswift_dso, CSWIFT_F2)) ||
404 !(p3 = (t_swSimpleRequest *)
405 DSO_bind_func(cswift_dso, CSWIFT_F3)) ||
406 !(p4 = (t_swReleaseAccContext *)
407 DSO_bind_func(cswift_dso, CSWIFT_F4)))
408 {
409 CSWIFTerr(CSWIFT_F_CSWIFT_INIT,CSWIFT_R_NOT_LOADED);
410 goto err;
411 }
412 /* Copy the pointers */
413 p_CSwift_AcquireAccContext = p1;
414 p_CSwift_AttachKeyParam = p2;
415 p_CSwift_SimpleRequest = p3;
416 p_CSwift_ReleaseAccContext = p4;
417 /* Try and get a context - if not, we may have a DSO but no
418 * accelerator! */
419 if(!get_context(&hac))
420 {
421 CSWIFTerr(CSWIFT_F_CSWIFT_INIT,CSWIFT_R_UNIT_FAILURE);
422 goto err;
423 }
424 release_context(hac);
425 /* Everything's fine. */
426 return 1;
427err:
428 if(cswift_dso)
429 {
430 DSO_free(cswift_dso);
431 cswift_dso = NULL;
432 }
433 p_CSwift_AcquireAccContext = NULL;
434 p_CSwift_AttachKeyParam = NULL;
435 p_CSwift_SimpleRequest = NULL;
436 p_CSwift_ReleaseAccContext = NULL;
437 return 0;
438 }
439
440static int cswift_finish(ENGINE *e)
441 {
442 free_CSWIFT_LIBNAME();
443 if(cswift_dso == NULL)
444 {
445 CSWIFTerr(CSWIFT_F_CSWIFT_FINISH,CSWIFT_R_NOT_LOADED);
446 return 0;
447 }
448 if(!DSO_free(cswift_dso))
449 {
450 CSWIFTerr(CSWIFT_F_CSWIFT_FINISH,CSWIFT_R_UNIT_FAILURE);
451 return 0;
452 }
453 cswift_dso = NULL;
454 p_CSwift_AcquireAccContext = NULL;
455 p_CSwift_AttachKeyParam = NULL;
456 p_CSwift_SimpleRequest = NULL;
457 p_CSwift_ReleaseAccContext = NULL;
458 return 1;
459 }
460
461static int cswift_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f)(void))
462 {
463 int initialised = ((cswift_dso == NULL) ? 0 : 1);
464 switch(cmd)
465 {
466 case CSWIFT_CMD_SO_PATH:
467 if(p == NULL)
468 {
469 CSWIFTerr(CSWIFT_F_CSWIFT_CTRL,ERR_R_PASSED_NULL_PARAMETER);
470 return 0;
471 }
472 if(initialised)
473 {
474 CSWIFTerr(CSWIFT_F_CSWIFT_CTRL,CSWIFT_R_ALREADY_LOADED);
475 return 0;
476 }
477 return set_CSWIFT_LIBNAME((const char *)p);
478 default:
479 break;
480 }
481 CSWIFTerr(CSWIFT_F_CSWIFT_CTRL,CSWIFT_R_CTRL_COMMAND_NOT_IMPLEMENTED);
482 return 0;
483 }
484
485/* Un petit mod_exp */
486static int cswift_mod_exp(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
487 const BIGNUM *m, BN_CTX *ctx)
488 {
489 /* I need somewhere to store temporary serialised values for
490 * use with the CryptoSwift API calls. A neat cheat - I'll use
491 * BIGNUMs from the BN_CTX but access their arrays directly as
492 * byte arrays <grin>. This way I don't have to clean anything
493 * up. */
494 BIGNUM *modulus;
495 BIGNUM *exponent;
496 BIGNUM *argument;
497 BIGNUM *result;
498 SW_STATUS sw_status;
499 SW_LARGENUMBER arg, res;
500 SW_PARAM sw_param;
501 SW_CONTEXT_HANDLE hac;
502 int to_return, acquired;
503
504 modulus = exponent = argument = result = NULL;
505 to_return = 0; /* expect failure */
506 acquired = 0;
507
508 if(!get_context(&hac))
509 {
510 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP,CSWIFT_R_UNIT_FAILURE);
511 goto err;
512 }
513 acquired = 1;
514 /* Prepare the params */
515 BN_CTX_start(ctx);
516 modulus = BN_CTX_get(ctx);
517 exponent = BN_CTX_get(ctx);
518 argument = BN_CTX_get(ctx);
519 result = BN_CTX_get(ctx);
520 if(!result)
521 {
522 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP,CSWIFT_R_BN_CTX_FULL);
523 goto err;
524 }
525 if(!bn_wexpand(modulus, m->top) || !bn_wexpand(exponent, p->top) ||
526 !bn_wexpand(argument, a->top) || !bn_wexpand(result, m->top))
527 {
528 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP,CSWIFT_R_BN_EXPAND_FAIL);
529 goto err;
530 }
531 sw_param.type = SW_ALG_EXP;
532 sw_param.up.exp.modulus.nbytes = BN_bn2bin(m,
533 (unsigned char *)modulus->d);
534 sw_param.up.exp.modulus.value = (unsigned char *)modulus->d;
535 sw_param.up.exp.exponent.nbytes = BN_bn2bin(p,
536 (unsigned char *)exponent->d);
537 sw_param.up.exp.exponent.value = (unsigned char *)exponent->d;
538 /* Attach the key params */
539 sw_status = p_CSwift_AttachKeyParam(hac, &sw_param);
540 switch(sw_status)
541 {
542 case SW_OK:
543 break;
544 case SW_ERR_INPUT_SIZE:
545 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP,CSWIFT_R_BAD_KEY_SIZE);
546 goto err;
547 default:
548 {
549 char tmpbuf[DECIMAL_SIZE(sw_status)+1];
550 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP,CSWIFT_R_REQUEST_FAILED);
551 sprintf(tmpbuf, "%ld", sw_status);
552 ERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf);
553 }
554 goto err;
555 }
556 /* Prepare the argument and response */
557 arg.nbytes = BN_bn2bin(a, (unsigned char *)argument->d);
558 arg.value = (unsigned char *)argument->d;
559 res.nbytes = BN_num_bytes(m);
560 memset(result->d, 0, res.nbytes);
561 res.value = (unsigned char *)result->d;
562 /* Perform the operation */
563 if((sw_status = p_CSwift_SimpleRequest(hac, SW_CMD_MODEXP, &arg, 1,
564 &res, 1)) != SW_OK)
565 {
566 char tmpbuf[DECIMAL_SIZE(sw_status)+1];
567 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP,CSWIFT_R_REQUEST_FAILED);
568 sprintf(tmpbuf, "%ld", sw_status);
569 ERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf);
570 goto err;
571 }
572 /* Convert the response */
573 BN_bin2bn((unsigned char *)result->d, res.nbytes, r);
574 to_return = 1;
575err:
576 if(acquired)
577 release_context(hac);
578 BN_CTX_end(ctx);
579 return to_return;
580 }
581
582
583#ifndef OPENSSL_NO_RSA
584int cswift_bn_32copy(SW_LARGENUMBER * out, const BIGNUM * in)
585{
586 int mod;
587 int numbytes = BN_num_bytes(in);
588
589 mod = 0;
590 while( ((out->nbytes = (numbytes+mod)) % 32) )
591 {
592 mod++;
593 }
594 out->value = (unsigned char*)OPENSSL_malloc(out->nbytes);
595 if(!out->value)
596 {
597 return 0;
598 }
599 BN_bn2bin(in, &out->value[mod]);
600 if(mod)
601 memset(out->value, 0, mod);
602
603 return 1;
604}
605#endif
606
607#ifndef OPENSSL_NO_RSA
608/* Un petit mod_exp chinois */
609static int cswift_mod_exp_crt(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
610 const BIGNUM *q, const BIGNUM *dmp1,
611 const BIGNUM *dmq1, const BIGNUM *iqmp, BN_CTX *ctx)
612 {
613 SW_STATUS sw_status;
614 SW_LARGENUMBER arg, res;
615 SW_PARAM sw_param;
616 SW_CONTEXT_HANDLE hac;
617 BIGNUM *result = NULL;
618 BIGNUM *argument = NULL;
619 int to_return = 0; /* expect failure */
620 int acquired = 0;
621
622 sw_param.up.crt.p.value = NULL;
623 sw_param.up.crt.q.value = NULL;
624 sw_param.up.crt.dmp1.value = NULL;
625 sw_param.up.crt.dmq1.value = NULL;
626 sw_param.up.crt.iqmp.value = NULL;
627
628 if(!get_context(&hac))
629 {
630 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP_CRT,CSWIFT_R_UNIT_FAILURE);
631 goto err;
632 }
633 acquired = 1;
634
635 /* Prepare the params */
636 argument = BN_new();
637 result = BN_new();
638 if(!result || !argument)
639 {
640 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP_CRT,CSWIFT_R_BN_CTX_FULL);
641 goto err;
642 }
643
644
645 sw_param.type = SW_ALG_CRT;
646 /************************************************************************/
647 /* 04/02/2003 */
648 /* Modified by Frederic Giudicelli (deny-all.com) to overcome the */
649 /* limitation of cswift with values not a multiple of 32 */
650 /************************************************************************/
651 if(!cswift_bn_32copy(&sw_param.up.crt.p, p))
652 {
653 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP_CRT,CSWIFT_R_BN_EXPAND_FAIL);
654 goto err;
655 }
656 if(!cswift_bn_32copy(&sw_param.up.crt.q, q))
657 {
658 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP_CRT,CSWIFT_R_BN_EXPAND_FAIL);
659 goto err;
660 }
661 if(!cswift_bn_32copy(&sw_param.up.crt.dmp1, dmp1))
662 {
663 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP_CRT,CSWIFT_R_BN_EXPAND_FAIL);
664 goto err;
665 }
666 if(!cswift_bn_32copy(&sw_param.up.crt.dmq1, dmq1))
667 {
668 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP_CRT,CSWIFT_R_BN_EXPAND_FAIL);
669 goto err;
670 }
671 if(!cswift_bn_32copy(&sw_param.up.crt.iqmp, iqmp))
672 {
673 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP_CRT,CSWIFT_R_BN_EXPAND_FAIL);
674 goto err;
675 }
676 if( !bn_wexpand(argument, a->top) ||
677 !bn_wexpand(result, p->top + q->top))
678 {
679 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP_CRT,CSWIFT_R_BN_EXPAND_FAIL);
680 goto err;
681 }
682
683 /* Attach the key params */
684 sw_status = p_CSwift_AttachKeyParam(hac, &sw_param);
685 switch(sw_status)
686 {
687 case SW_OK:
688 break;
689 case SW_ERR_INPUT_SIZE:
690 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP_CRT,CSWIFT_R_BAD_KEY_SIZE);
691 goto err;
692 default:
693 {
694 char tmpbuf[DECIMAL_SIZE(sw_status)+1];
695 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP_CRT,CSWIFT_R_REQUEST_FAILED);
696 sprintf(tmpbuf, "%ld", sw_status);
697 ERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf);
698 }
699 goto err;
700 }
701 /* Prepare the argument and response */
702 arg.nbytes = BN_bn2bin(a, (unsigned char *)argument->d);
703 arg.value = (unsigned char *)argument->d;
704 res.nbytes = 2 * BN_num_bytes(p);
705 memset(result->d, 0, res.nbytes);
706 res.value = (unsigned char *)result->d;
707 /* Perform the operation */
708 if((sw_status = p_CSwift_SimpleRequest(hac, SW_CMD_MODEXP_CRT, &arg, 1,
709 &res, 1)) != SW_OK)
710 {
711 char tmpbuf[DECIMAL_SIZE(sw_status)+1];
712 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP_CRT,CSWIFT_R_REQUEST_FAILED);
713 sprintf(tmpbuf, "%ld", sw_status);
714 ERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf);
715 goto err;
716 }
717 /* Convert the response */
718 BN_bin2bn((unsigned char *)result->d, res.nbytes, r);
719 to_return = 1;
720err:
721 if(sw_param.up.crt.p.value)
722 OPENSSL_free(sw_param.up.crt.p.value);
723 if(sw_param.up.crt.q.value)
724 OPENSSL_free(sw_param.up.crt.q.value);
725 if(sw_param.up.crt.dmp1.value)
726 OPENSSL_free(sw_param.up.crt.dmp1.value);
727 if(sw_param.up.crt.dmq1.value)
728 OPENSSL_free(sw_param.up.crt.dmq1.value);
729 if(sw_param.up.crt.iqmp.value)
730 OPENSSL_free(sw_param.up.crt.iqmp.value);
731 if(result)
732 BN_free(result);
733 if(argument)
734 BN_free(argument);
735 if(acquired)
736 release_context(hac);
737 return to_return;
738 }
739#endif
740
741#ifndef OPENSSL_NO_RSA
742static int cswift_rsa_mod_exp(BIGNUM *r0, const BIGNUM *I, RSA *rsa, BN_CTX *ctx)
743 {
744 int to_return = 0;
745 const RSA_METHOD * def_rsa_method;
746
747 if(!rsa->p || !rsa->q || !rsa->dmp1 || !rsa->dmq1 || !rsa->iqmp)
748 {
749 CSWIFTerr(CSWIFT_F_CSWIFT_RSA_MOD_EXP,CSWIFT_R_MISSING_KEY_COMPONENTS);
750 goto err;
751 }
752
753 /* Try the limits of RSA (2048 bits) */
754 if(BN_num_bytes(rsa->p) > 128 ||
755 BN_num_bytes(rsa->q) > 128 ||
756 BN_num_bytes(rsa->dmp1) > 128 ||
757 BN_num_bytes(rsa->dmq1) > 128 ||
758 BN_num_bytes(rsa->iqmp) > 128)
759 {
760#ifdef RSA_NULL
761 def_rsa_method=RSA_null_method();
762#else
763#if 0
764 def_rsa_method=RSA_PKCS1_RSAref();
765#else
766 def_rsa_method=RSA_PKCS1_SSLeay();
767#endif
768#endif
769 if(def_rsa_method)
770 return def_rsa_method->rsa_mod_exp(r0, I, rsa, ctx);
771 }
772
773 to_return = cswift_mod_exp_crt(r0, I, rsa->p, rsa->q, rsa->dmp1,
774 rsa->dmq1, rsa->iqmp, ctx);
775err:
776 return to_return;
777 }
778
779/* This function is aliased to mod_exp (with the mont stuff dropped). */
780static int cswift_mod_exp_mont(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
781 const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx)
782 {
783 const RSA_METHOD * def_rsa_method;
784
785 /* Try the limits of RSA (2048 bits) */
786 if(BN_num_bytes(r) > 256 ||
787 BN_num_bytes(a) > 256 ||
788 BN_num_bytes(m) > 256)
789 {
790#ifdef RSA_NULL
791 def_rsa_method=RSA_null_method();
792#else
793#if 0
794 def_rsa_method=RSA_PKCS1_RSAref();
795#else
796 def_rsa_method=RSA_PKCS1_SSLeay();
797#endif
798#endif
799 if(def_rsa_method)
800 return def_rsa_method->bn_mod_exp(r, a, p, m, ctx, m_ctx);
801 }
802
803 return cswift_mod_exp(r, a, p, m, ctx);
804 }
805#endif /* OPENSSL_NO_RSA */
806
807#ifndef OPENSSL_NO_DSA
808static DSA_SIG *cswift_dsa_sign(const unsigned char *dgst, int dlen, DSA *dsa)
809 {
810 SW_CONTEXT_HANDLE hac;
811 SW_PARAM sw_param;
812 SW_STATUS sw_status;
813 SW_LARGENUMBER arg, res;
814 BN_CTX *ctx;
815 BIGNUM *dsa_p = NULL;
816 BIGNUM *dsa_q = NULL;
817 BIGNUM *dsa_g = NULL;
818 BIGNUM *dsa_key = NULL;
819 BIGNUM *result = NULL;
820 DSA_SIG *to_return = NULL;
821 int acquired = 0;
822
823 if((ctx = BN_CTX_new()) == NULL)
824 goto err;
825 if(!get_context(&hac))
826 {
827 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_SIGN,CSWIFT_R_UNIT_FAILURE);
828 goto err;
829 }
830 acquired = 1;
831 /* Prepare the params */
832 BN_CTX_start(ctx);
833 dsa_p = BN_CTX_get(ctx);
834 dsa_q = BN_CTX_get(ctx);
835 dsa_g = BN_CTX_get(ctx);
836 dsa_key = BN_CTX_get(ctx);
837 result = BN_CTX_get(ctx);
838 if(!result)
839 {
840 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_SIGN,CSWIFT_R_BN_CTX_FULL);
841 goto err;
842 }
843 if(!bn_wexpand(dsa_p, dsa->p->top) ||
844 !bn_wexpand(dsa_q, dsa->q->top) ||
845 !bn_wexpand(dsa_g, dsa->g->top) ||
846 !bn_wexpand(dsa_key, dsa->priv_key->top) ||
847 !bn_wexpand(result, dsa->p->top))
848 {
849 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_SIGN,CSWIFT_R_BN_EXPAND_FAIL);
850 goto err;
851 }
852 sw_param.type = SW_ALG_DSA;
853 sw_param.up.dsa.p.nbytes = BN_bn2bin(dsa->p,
854 (unsigned char *)dsa_p->d);
855 sw_param.up.dsa.p.value = (unsigned char *)dsa_p->d;
856 sw_param.up.dsa.q.nbytes = BN_bn2bin(dsa->q,
857 (unsigned char *)dsa_q->d);
858 sw_param.up.dsa.q.value = (unsigned char *)dsa_q->d;
859 sw_param.up.dsa.g.nbytes = BN_bn2bin(dsa->g,
860 (unsigned char *)dsa_g->d);
861 sw_param.up.dsa.g.value = (unsigned char *)dsa_g->d;
862 sw_param.up.dsa.key.nbytes = BN_bn2bin(dsa->priv_key,
863 (unsigned char *)dsa_key->d);
864 sw_param.up.dsa.key.value = (unsigned char *)dsa_key->d;
865 /* Attach the key params */
866 sw_status = p_CSwift_AttachKeyParam(hac, &sw_param);
867 switch(sw_status)
868 {
869 case SW_OK:
870 break;
871 case SW_ERR_INPUT_SIZE:
872 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_SIGN,CSWIFT_R_BAD_KEY_SIZE);
873 goto err;
874 default:
875 {
876 char tmpbuf[DECIMAL_SIZE(sw_status)+1];
877 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_SIGN,CSWIFT_R_REQUEST_FAILED);
878 sprintf(tmpbuf, "%ld", sw_status);
879 ERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf);
880 }
881 goto err;
882 }
883 /* Prepare the argument and response */
884 arg.nbytes = dlen;
885 arg.value = (unsigned char *)dgst;
886 res.nbytes = BN_num_bytes(dsa->p);
887 memset(result->d, 0, res.nbytes);
888 res.value = (unsigned char *)result->d;
889 /* Perform the operation */
890 sw_status = p_CSwift_SimpleRequest(hac, SW_CMD_DSS_SIGN, &arg, 1,
891 &res, 1);
892 if(sw_status != SW_OK)
893 {
894 char tmpbuf[DECIMAL_SIZE(sw_status)+1];
895 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_SIGN,CSWIFT_R_REQUEST_FAILED);
896 sprintf(tmpbuf, "%ld", sw_status);
897 ERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf);
898 goto err;
899 }
900 /* Convert the response */
901 if((to_return = DSA_SIG_new()) == NULL)
902 goto err;
903 to_return->r = BN_bin2bn((unsigned char *)result->d, 20, NULL);
904 to_return->s = BN_bin2bn((unsigned char *)result->d + 20, 20, NULL);
905
906err:
907 if(acquired)
908 release_context(hac);
909 if(ctx)
910 {
911 BN_CTX_end(ctx);
912 BN_CTX_free(ctx);
913 }
914 return to_return;
915 }
916
917static int cswift_dsa_verify(const unsigned char *dgst, int dgst_len,
918 DSA_SIG *sig, DSA *dsa)
919 {
920 SW_CONTEXT_HANDLE hac;
921 SW_PARAM sw_param;
922 SW_STATUS sw_status;
923 SW_LARGENUMBER arg[2], res;
924 unsigned long sig_result;
925 BN_CTX *ctx;
926 BIGNUM *dsa_p = NULL;
927 BIGNUM *dsa_q = NULL;
928 BIGNUM *dsa_g = NULL;
929 BIGNUM *dsa_key = NULL;
930 BIGNUM *argument = NULL;
931 int to_return = -1;
932 int acquired = 0;
933
934 if((ctx = BN_CTX_new()) == NULL)
935 goto err;
936 if(!get_context(&hac))
937 {
938 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_VERIFY,CSWIFT_R_UNIT_FAILURE);
939 goto err;
940 }
941 acquired = 1;
942 /* Prepare the params */
943 BN_CTX_start(ctx);
944 dsa_p = BN_CTX_get(ctx);
945 dsa_q = BN_CTX_get(ctx);
946 dsa_g = BN_CTX_get(ctx);
947 dsa_key = BN_CTX_get(ctx);
948 argument = BN_CTX_get(ctx);
949 if(!argument)
950 {
951 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_VERIFY,CSWIFT_R_BN_CTX_FULL);
952 goto err;
953 }
954 if(!bn_wexpand(dsa_p, dsa->p->top) ||
955 !bn_wexpand(dsa_q, dsa->q->top) ||
956 !bn_wexpand(dsa_g, dsa->g->top) ||
957 !bn_wexpand(dsa_key, dsa->pub_key->top) ||
958 !bn_wexpand(argument, 40))
959 {
960 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_VERIFY,CSWIFT_R_BN_EXPAND_FAIL);
961 goto err;
962 }
963 sw_param.type = SW_ALG_DSA;
964 sw_param.up.dsa.p.nbytes = BN_bn2bin(dsa->p,
965 (unsigned char *)dsa_p->d);
966 sw_param.up.dsa.p.value = (unsigned char *)dsa_p->d;
967 sw_param.up.dsa.q.nbytes = BN_bn2bin(dsa->q,
968 (unsigned char *)dsa_q->d);
969 sw_param.up.dsa.q.value = (unsigned char *)dsa_q->d;
970 sw_param.up.dsa.g.nbytes = BN_bn2bin(dsa->g,
971 (unsigned char *)dsa_g->d);
972 sw_param.up.dsa.g.value = (unsigned char *)dsa_g->d;
973 sw_param.up.dsa.key.nbytes = BN_bn2bin(dsa->pub_key,
974 (unsigned char *)dsa_key->d);
975 sw_param.up.dsa.key.value = (unsigned char *)dsa_key->d;
976 /* Attach the key params */
977 sw_status = p_CSwift_AttachKeyParam(hac, &sw_param);
978 switch(sw_status)
979 {
980 case SW_OK:
981 break;
982 case SW_ERR_INPUT_SIZE:
983 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_VERIFY,CSWIFT_R_BAD_KEY_SIZE);
984 goto err;
985 default:
986 {
987 char tmpbuf[DECIMAL_SIZE(sw_status)+1];
988 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_VERIFY,CSWIFT_R_REQUEST_FAILED);
989 sprintf(tmpbuf, "%ld", sw_status);
990 ERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf);
991 }
992 goto err;
993 }
994 /* Prepare the argument and response */
995 arg[0].nbytes = dgst_len;
996 arg[0].value = (unsigned char *)dgst;
997 arg[1].nbytes = 40;
998 arg[1].value = (unsigned char *)argument->d;
999 memset(arg[1].value, 0, 40);
1000 BN_bn2bin(sig->r, arg[1].value + 20 - BN_num_bytes(sig->r));
1001 BN_bn2bin(sig->s, arg[1].value + 40 - BN_num_bytes(sig->s));
1002 res.nbytes = 4; /* unsigned long */
1003 res.value = (unsigned char *)(&sig_result);
1004 /* Perform the operation */
1005 sw_status = p_CSwift_SimpleRequest(hac, SW_CMD_DSS_VERIFY, arg, 2,
1006 &res, 1);
1007 if(sw_status != SW_OK)
1008 {
1009 char tmpbuf[DECIMAL_SIZE(sw_status)+1];
1010 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_VERIFY,CSWIFT_R_REQUEST_FAILED);
1011 sprintf(tmpbuf, "%ld", sw_status);
1012 ERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf);
1013 goto err;
1014 }
1015 /* Convert the response */
1016 to_return = ((sig_result == 0) ? 0 : 1);
1017
1018err:
1019 if(acquired)
1020 release_context(hac);
1021 if(ctx)
1022 {
1023 BN_CTX_end(ctx);
1024 BN_CTX_free(ctx);
1025 }
1026 return to_return;
1027 }
1028#endif
1029
1030#ifndef OPENSSL_NO_DH
1031/* This function is aliased to mod_exp (with the dh and mont dropped). */
1032static int cswift_mod_exp_dh(const DH *dh, BIGNUM *r,
1033 const BIGNUM *a, const BIGNUM *p,
1034 const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx)
1035 {
1036 return cswift_mod_exp(r, a, p, m, ctx);
1037 }
1038#endif
1039
1040/* Random bytes are good */
1041static int cswift_rand_bytes(unsigned char *buf, int num)
1042{
1043 SW_CONTEXT_HANDLE hac;
1044 SW_STATUS swrc;
1045 SW_LARGENUMBER largenum;
1046 int acquired = 0;
1047 int to_return = 0; /* assume failure */
1048 unsigned char buf32[1024];
1049
1050
1051 if (!get_context(&hac))
1052 {
1053 CSWIFTerr(CSWIFT_F_CSWIFT_RAND_BYTES, CSWIFT_R_UNIT_FAILURE);
1054 goto err;
1055 }
1056 acquired = 1;
1057
1058 /************************************************************************/
1059 /* 04/02/2003 */
1060 /* Modified by Frederic Giudicelli (deny-all.com) to overcome the */
1061 /* limitation of cswift with values not a multiple of 32 */
1062 /************************************************************************/
1063
1064 while(num >= (int)sizeof(buf32))
1065 {
1066 largenum.value = buf;
1067 largenum.nbytes = sizeof(buf32);
1068 /* tell CryptoSwift how many bytes we want and where we want it.
1069 * Note: - CryptoSwift cannot do more than 4096 bytes at a time.
1070 * - CryptoSwift can only do multiple of 32-bits. */
1071 swrc = p_CSwift_SimpleRequest(hac, SW_CMD_RAND, NULL, 0, &largenum, 1);
1072 if (swrc != SW_OK)
1073 {
1074 char tmpbuf[20];
1075 CSWIFTerr(CSWIFT_F_CSWIFT_RAND_BYTES, CSWIFT_R_REQUEST_FAILED);
1076 sprintf(tmpbuf, "%ld", swrc);
1077 ERR_add_error_data(2, "CryptoSwift error number is ", tmpbuf);
1078 goto err;
1079 }
1080 buf += sizeof(buf32);
1081 num -= sizeof(buf32);
1082 }
1083 if(num)
1084 {
1085 largenum.nbytes = sizeof(buf32);
1086 largenum.value = buf32;
1087 swrc = p_CSwift_SimpleRequest(hac, SW_CMD_RAND, NULL, 0, &largenum, 1);
1088 if (swrc != SW_OK)
1089 {
1090 char tmpbuf[20];
1091 CSWIFTerr(CSWIFT_F_CSWIFT_RAND_BYTES, CSWIFT_R_REQUEST_FAILED);
1092 sprintf(tmpbuf, "%ld", swrc);
1093 ERR_add_error_data(2, "CryptoSwift error number is ", tmpbuf);
1094 goto err;
1095 }
1096 memcpy(buf, largenum.value, num);
1097 }
1098
1099 to_return = 1; /* success */
1100err:
1101 if (acquired)
1102 release_context(hac);
1103
1104 return to_return;
1105}
1106
1107static int cswift_rand_status(void)
1108{
1109 return 1;
1110}
1111
1112
1113/* This stuff is needed if this ENGINE is being compiled into a self-contained
1114 * shared-library. */
1115#ifndef OPENSSL_NO_DYNAMIC_ENGINE
1116static int bind_fn(ENGINE *e, const char *id)
1117 {
1118 if(id && (strcmp(id, engine_cswift_id) != 0))
1119 return 0;
1120 if(!bind_helper(e))
1121 return 0;
1122 return 1;
1123 }
1124IMPLEMENT_DYNAMIC_CHECK_FN()
1125IMPLEMENT_DYNAMIC_BIND_FN(bind_fn)
1126#endif /* OPENSSL_NO_DYNAMIC_ENGINE */
1127
1128#endif /* !OPENSSL_NO_HW_CSWIFT */
1129#endif /* !OPENSSL_NO_HW */
generated by cgit v1.2.3-55-g6feb (git 2.39.1) at 2025-04-26 22:33:30 +0000