1 /* crypto/engine/hw_cswift.c */
2 /* Written by Geoff Thorpe (geoff@geoffthorpe.net) for the OpenSSL
5 /* ====================================================================
6 * Copyright (c) 1999-2001 The OpenSSL Project. All rights reserved.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
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
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/)"
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.
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.
34 * 6. Redistributions of any form whatsoever must retain the following
36 * "This product includes software developed by the OpenSSL Project
37 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
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 * ====================================================================
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).
61 #include <openssl/crypto.h>
62 #include <openssl/buffer.h>
63 #include <openssl/dso.h>
64 #include <openssl/engine.h>
67 #ifndef OPENSSL_NO_HW_CSWIFT
69 /* Attribution notice: Rainbow have generously allowed me to reproduce
70 * the necessary definitions here from their API. This means the support
71 * can build independently of whether application builders have the
72 * API or hardware. This will allow developers to easily produce software
73 * that has latent hardware support for any users that have accelerators
74 * installed, without the developers themselves needing anything extra.
76 * I have only clipped the parts from the CryptoSwift header files that
77 * are (or seem) relevant to the CryptoSwift support code. This is
78 * simply to keep the file sizes reasonable.
84 #include "vendor_defns/cswift.h"
87 #define CSWIFT_LIB_NAME "cswift engine"
88 #include "e_cswift_err.c"
90 #define DECIMAL_SIZE(type) ((sizeof(type)*8+2)/3+1)
92 static int cswift_destroy(ENGINE *e);
93 static int cswift_init(ENGINE *e);
94 static int cswift_finish(ENGINE *e);
95 static int cswift_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f)());
98 static int cswift_mod_exp(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
99 const BIGNUM *m, BN_CTX *ctx);
100 static int cswift_mod_exp_crt(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
101 const BIGNUM *q, const BIGNUM *dmp1, const BIGNUM *dmq1,
102 const BIGNUM *iqmp, BN_CTX *ctx);
104 #ifndef OPENSSL_NO_RSA
106 static int cswift_rsa_mod_exp(BIGNUM *r0, const BIGNUM *I, RSA *rsa);
108 /* This function is aliased to mod_exp (with the mont stuff dropped). */
109 static int cswift_mod_exp_mont(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
110 const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx);
112 #ifndef OPENSSL_NO_DSA
114 static DSA_SIG *cswift_dsa_sign(const unsigned char *dgst, int dlen, DSA *dsa);
115 static int cswift_dsa_verify(const unsigned char *dgst, int dgst_len,
116 DSA_SIG *sig, DSA *dsa);
119 #ifndef OPENSSL_NO_DH
121 /* This function is alised to mod_exp (with the DH and mont dropped). */
122 static int cswift_mod_exp_dh(const DH *dh, BIGNUM *r,
123 const BIGNUM *a, const BIGNUM *p,
124 const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx);
128 static int cswift_rand_bytes(unsigned char *buf, int num);
129 static int cswift_rand_status(void);
131 /* The definitions for control commands specific to this engine */
132 #define CSWIFT_CMD_SO_PATH ENGINE_CMD_BASE
133 static const ENGINE_CMD_DEFN cswift_cmd_defns[] = {
136 "Specifies the path to the 'cswift' shared library",
137 ENGINE_CMD_FLAG_STRING},
141 #ifndef OPENSSL_NO_RSA
142 /* Our internal RSA_METHOD that we provide pointers to */
143 static RSA_METHOD cswift_rsa =
145 "CryptoSwift RSA method",
162 #ifndef OPENSSL_NO_DSA
163 /* Our internal DSA_METHOD that we provide pointers to */
164 static DSA_METHOD cswift_dsa =
166 "CryptoSwift DSA method",
168 NULL, /* dsa_sign_setup */
170 NULL, /* dsa_mod_exp */
171 NULL, /* bn_mod_exp */
179 #ifndef OPENSSL_NO_DH
180 /* Our internal DH_METHOD that we provide pointers to */
181 static DH_METHOD cswift_dh =
183 "CryptoSwift DH method",
194 static RAND_METHOD cswift_random =
196 /* "CryptoSwift RAND method", */
206 /* Constants used when creating the ENGINE */
207 static const char *engine_cswift_id = "cswift";
208 static const char *engine_cswift_name = "CryptoSwift hardware engine support";
210 /* This internal function is used by ENGINE_cswift() and possibly by the
211 * "dynamic" ENGINE support too */
212 static int bind_helper(ENGINE *e)
214 #ifndef OPENSSL_NO_RSA
215 const RSA_METHOD *meth1;
217 #ifndef OPENSSL_NO_DH
218 const DH_METHOD *meth2;
220 if(!ENGINE_set_id(e, engine_cswift_id) ||
221 !ENGINE_set_name(e, engine_cswift_name) ||
222 #ifndef OPENSSL_NO_RSA
223 !ENGINE_set_RSA(e, &cswift_rsa) ||
225 #ifndef OPENSSL_NO_DSA
226 !ENGINE_set_DSA(e, &cswift_dsa) ||
228 #ifndef OPENSSL_NO_DH
229 !ENGINE_set_DH(e, &cswift_dh) ||
231 !ENGINE_set_RAND(e, &cswift_random) ||
232 !ENGINE_set_destroy_function(e, cswift_destroy) ||
233 !ENGINE_set_init_function(e, cswift_init) ||
234 !ENGINE_set_finish_function(e, cswift_finish) ||
235 !ENGINE_set_ctrl_function(e, cswift_ctrl) ||
236 !ENGINE_set_cmd_defns(e, cswift_cmd_defns))
239 #ifndef OPENSSL_NO_RSA
240 /* We know that the "PKCS1_SSLeay()" functions hook properly
241 * to the cswift-specific mod_exp and mod_exp_crt so we use
242 * those functions. NB: We don't use ENGINE_openssl() or
243 * anything "more generic" because something like the RSAref
244 * code may not hook properly, and if you own one of these
245 * cards then you have the right to do RSA operations on it
247 meth1 = RSA_PKCS1_SSLeay();
248 cswift_rsa.rsa_pub_enc = meth1->rsa_pub_enc;
249 cswift_rsa.rsa_pub_dec = meth1->rsa_pub_dec;
250 cswift_rsa.rsa_priv_enc = meth1->rsa_priv_enc;
251 cswift_rsa.rsa_priv_dec = meth1->rsa_priv_dec;
254 #ifndef OPENSSL_NO_DH
255 /* Much the same for Diffie-Hellman */
256 meth2 = DH_OpenSSL();
257 cswift_dh.generate_key = meth2->generate_key;
258 cswift_dh.compute_key = meth2->compute_key;
261 /* Ensure the cswift error handling is set up */
262 ERR_load_CSWIFT_strings();
266 #ifdef OPENSSL_NO_DYNAMIC_ENGINE
267 static ENGINE *engine_cswift(void)
269 ENGINE *ret = ENGINE_new();
272 if(!bind_helper(ret))
280 void ENGINE_load_cswift(void)
282 /* Copied from eng_[openssl|dyn].c */
283 ENGINE *toadd = engine_cswift();
291 /* This is a process-global DSO handle used for loading and unloading
292 * the CryptoSwift library. NB: This is only set (or unset) during an
293 * init() or finish() call (reference counts permitting) and they're
294 * operating with global locks, so this should be thread-safe
296 static DSO *cswift_dso = NULL;
298 /* These are the function pointers that are (un)set when the library has
299 * successfully (un)loaded. */
300 t_swAcquireAccContext *p_CSwift_AcquireAccContext = NULL;
301 t_swAttachKeyParam *p_CSwift_AttachKeyParam = NULL;
302 t_swSimpleRequest *p_CSwift_SimpleRequest = NULL;
303 t_swReleaseAccContext *p_CSwift_ReleaseAccContext = NULL;
305 /* Used in the DSO operations. */
306 static const char *CSWIFT_LIBNAME = NULL;
307 static const char *get_CSWIFT_LIBNAME(void)
310 return CSWIFT_LIBNAME;
313 static void free_CSWIFT_LIBNAME(void)
316 OPENSSL_free((void*)CSWIFT_LIBNAME);
317 CSWIFT_LIBNAME = NULL;
319 static long set_CSWIFT_LIBNAME(const char *name)
321 free_CSWIFT_LIBNAME();
322 return (((CSWIFT_LIBNAME = BUF_strdup(name)) != NULL) ? 1 : 0);
324 static const char *CSWIFT_F1 = "swAcquireAccContext";
325 static const char *CSWIFT_F2 = "swAttachKeyParam";
326 static const char *CSWIFT_F3 = "swSimpleRequest";
327 static const char *CSWIFT_F4 = "swReleaseAccContext";
330 /* CryptoSwift library functions and mechanics - these are used by the
331 * higher-level functions further down. NB: As and where there's no
332 * error checking, take a look lower down where these functions are
333 * called, the checking and error handling is probably down there. */
335 /* utility function to obtain a context */
336 static int get_context(SW_CONTEXT_HANDLE *hac)
340 status = p_CSwift_AcquireAccContext(hac);
346 /* similarly to release one. */
347 static void release_context(SW_CONTEXT_HANDLE hac)
349 p_CSwift_ReleaseAccContext(hac);
352 /* Destructor (complements the "ENGINE_cswift()" constructor) */
353 static int cswift_destroy(ENGINE *e)
355 free_CSWIFT_LIBNAME();
356 ERR_unload_CSWIFT_strings();
360 /* (de)initialisation functions. */
361 static int cswift_init(ENGINE *e)
363 SW_CONTEXT_HANDLE hac;
364 t_swAcquireAccContext *p1;
365 t_swAttachKeyParam *p2;
366 t_swSimpleRequest *p3;
367 t_swReleaseAccContext *p4;
369 if(cswift_dso != NULL)
371 CSWIFTerr(CSWIFT_F_CSWIFT_INIT,CSWIFT_R_ALREADY_LOADED);
374 /* Attempt to load libswift.so/swift.dll/whatever. */
375 cswift_dso = DSO_load(NULL, get_CSWIFT_LIBNAME(), NULL, 0);
376 if(cswift_dso == NULL)
378 CSWIFTerr(CSWIFT_F_CSWIFT_INIT,CSWIFT_R_NOT_LOADED);
381 if(!(p1 = (t_swAcquireAccContext *)
382 DSO_bind_func(cswift_dso, CSWIFT_F1)) ||
383 !(p2 = (t_swAttachKeyParam *)
384 DSO_bind_func(cswift_dso, CSWIFT_F2)) ||
385 !(p3 = (t_swSimpleRequest *)
386 DSO_bind_func(cswift_dso, CSWIFT_F3)) ||
387 !(p4 = (t_swReleaseAccContext *)
388 DSO_bind_func(cswift_dso, CSWIFT_F4)))
390 CSWIFTerr(CSWIFT_F_CSWIFT_INIT,CSWIFT_R_NOT_LOADED);
393 /* Copy the pointers */
394 p_CSwift_AcquireAccContext = p1;
395 p_CSwift_AttachKeyParam = p2;
396 p_CSwift_SimpleRequest = p3;
397 p_CSwift_ReleaseAccContext = p4;
398 /* Try and get a context - if not, we may have a DSO but no
400 if(!get_context(&hac))
402 CSWIFTerr(CSWIFT_F_CSWIFT_INIT,CSWIFT_R_UNIT_FAILURE);
405 release_context(hac);
406 /* Everything's fine. */
410 DSO_free(cswift_dso);
411 p_CSwift_AcquireAccContext = NULL;
412 p_CSwift_AttachKeyParam = NULL;
413 p_CSwift_SimpleRequest = NULL;
414 p_CSwift_ReleaseAccContext = NULL;
418 static int cswift_finish(ENGINE *e)
420 free_CSWIFT_LIBNAME();
421 if(cswift_dso == NULL)
423 CSWIFTerr(CSWIFT_F_CSWIFT_FINISH,CSWIFT_R_NOT_LOADED);
426 if(!DSO_free(cswift_dso))
428 CSWIFTerr(CSWIFT_F_CSWIFT_FINISH,CSWIFT_R_UNIT_FAILURE);
432 p_CSwift_AcquireAccContext = NULL;
433 p_CSwift_AttachKeyParam = NULL;
434 p_CSwift_SimpleRequest = NULL;
435 p_CSwift_ReleaseAccContext = NULL;
439 static int cswift_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f)())
441 int initialised = ((cswift_dso == NULL) ? 0 : 1);
444 case CSWIFT_CMD_SO_PATH:
447 CSWIFTerr(CSWIFT_F_CSWIFT_CTRL,ERR_R_PASSED_NULL_PARAMETER);
452 CSWIFTerr(CSWIFT_F_CSWIFT_CTRL,CSWIFT_R_ALREADY_LOADED);
455 return set_CSWIFT_LIBNAME((const char *)p);
459 CSWIFTerr(CSWIFT_F_CSWIFT_CTRL,CSWIFT_R_CTRL_COMMAND_NOT_IMPLEMENTED);
463 /* Un petit mod_exp */
464 static int cswift_mod_exp(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
465 const BIGNUM *m, BN_CTX *ctx)
467 /* I need somewhere to store temporary serialised values for
468 * use with the CryptoSwift API calls. A neat cheat - I'll use
469 * BIGNUMs from the BN_CTX but access their arrays directly as
470 * byte arrays <grin>. This way I don't have to clean anything
477 SW_LARGENUMBER arg, res;
479 SW_CONTEXT_HANDLE hac;
480 int to_return, acquired;
482 modulus = exponent = argument = result = NULL;
483 to_return = 0; /* expect failure */
486 if(!get_context(&hac))
488 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP,CSWIFT_R_UNIT_FAILURE);
492 /* Prepare the params */
494 modulus = BN_CTX_get(ctx);
495 exponent = BN_CTX_get(ctx);
496 argument = BN_CTX_get(ctx);
497 result = BN_CTX_get(ctx);
500 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP,CSWIFT_R_BN_CTX_FULL);
503 if(!bn_wexpand(modulus, m->top) || !bn_wexpand(exponent, p->top) ||
504 !bn_wexpand(argument, a->top) || !bn_wexpand(result, m->top))
506 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP,CSWIFT_R_BN_EXPAND_FAIL);
509 sw_param.type = SW_ALG_EXP;
510 sw_param.up.exp.modulus.nbytes = BN_bn2bin(m,
511 (unsigned char *)modulus->d);
512 sw_param.up.exp.modulus.value = (unsigned char *)modulus->d;
513 sw_param.up.exp.exponent.nbytes = BN_bn2bin(p,
514 (unsigned char *)exponent->d);
515 sw_param.up.exp.exponent.value = (unsigned char *)exponent->d;
516 /* Attach the key params */
517 sw_status = p_CSwift_AttachKeyParam(hac, &sw_param);
522 case SW_ERR_INPUT_SIZE:
523 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP,CSWIFT_R_BAD_KEY_SIZE);
527 char tmpbuf[DECIMAL_SIZE(sw_status)+1];
528 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP,CSWIFT_R_REQUEST_FAILED);
529 sprintf(tmpbuf, "%ld", sw_status);
530 ERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf);
534 /* Prepare the argument and response */
535 arg.nbytes = BN_bn2bin(a, (unsigned char *)argument->d);
536 arg.value = (unsigned char *)argument->d;
537 res.nbytes = BN_num_bytes(m);
538 memset(result->d, 0, res.nbytes);
539 res.value = (unsigned char *)result->d;
540 /* Perform the operation */
541 if((sw_status = p_CSwift_SimpleRequest(hac, SW_CMD_MODEXP, &arg, 1,
544 char tmpbuf[DECIMAL_SIZE(sw_status)+1];
545 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP,CSWIFT_R_REQUEST_FAILED);
546 sprintf(tmpbuf, "%ld", sw_status);
547 ERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf);
550 /* Convert the response */
551 BN_bin2bn((unsigned char *)result->d, res.nbytes, r);
555 release_context(hac);
560 /* Un petit mod_exp chinois */
561 static int cswift_mod_exp_crt(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
562 const BIGNUM *q, const BIGNUM *dmp1,
563 const BIGNUM *dmq1, const BIGNUM *iqmp, BN_CTX *ctx)
566 SW_LARGENUMBER arg, res;
568 SW_CONTEXT_HANDLE hac;
569 BIGNUM *rsa_p = NULL;
570 BIGNUM *rsa_q = NULL;
571 BIGNUM *rsa_dmp1 = NULL;
572 BIGNUM *rsa_dmq1 = NULL;
573 BIGNUM *rsa_iqmp = NULL;
574 BIGNUM *argument = NULL;
575 BIGNUM *result = NULL;
576 int to_return = 0; /* expect failure */
579 if(!get_context(&hac))
581 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP_CRT,CSWIFT_R_UNIT_FAILURE);
585 /* Prepare the params */
587 rsa_p = BN_CTX_get(ctx);
588 rsa_q = BN_CTX_get(ctx);
589 rsa_dmp1 = BN_CTX_get(ctx);
590 rsa_dmq1 = BN_CTX_get(ctx);
591 rsa_iqmp = BN_CTX_get(ctx);
592 argument = BN_CTX_get(ctx);
593 result = BN_CTX_get(ctx);
596 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP_CRT,CSWIFT_R_BN_CTX_FULL);
599 if(!bn_wexpand(rsa_p, p->top) || !bn_wexpand(rsa_q, q->top) ||
600 !bn_wexpand(rsa_dmp1, dmp1->top) ||
601 !bn_wexpand(rsa_dmq1, dmq1->top) ||
602 !bn_wexpand(rsa_iqmp, iqmp->top) ||
603 !bn_wexpand(argument, a->top) ||
604 !bn_wexpand(result, p->top + q->top))
606 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP_CRT,CSWIFT_R_BN_EXPAND_FAIL);
609 sw_param.type = SW_ALG_CRT;
610 sw_param.up.crt.p.nbytes = BN_bn2bin(p, (unsigned char *)rsa_p->d);
611 sw_param.up.crt.p.value = (unsigned char *)rsa_p->d;
612 sw_param.up.crt.q.nbytes = BN_bn2bin(q, (unsigned char *)rsa_q->d);
613 sw_param.up.crt.q.value = (unsigned char *)rsa_q->d;
614 sw_param.up.crt.dmp1.nbytes = BN_bn2bin(dmp1,
615 (unsigned char *)rsa_dmp1->d);
616 sw_param.up.crt.dmp1.value = (unsigned char *)rsa_dmp1->d;
617 sw_param.up.crt.dmq1.nbytes = BN_bn2bin(dmq1,
618 (unsigned char *)rsa_dmq1->d);
619 sw_param.up.crt.dmq1.value = (unsigned char *)rsa_dmq1->d;
620 sw_param.up.crt.iqmp.nbytes = BN_bn2bin(iqmp,
621 (unsigned char *)rsa_iqmp->d);
622 sw_param.up.crt.iqmp.value = (unsigned char *)rsa_iqmp->d;
623 /* Attach the key params */
624 sw_status = p_CSwift_AttachKeyParam(hac, &sw_param);
629 case SW_ERR_INPUT_SIZE:
630 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP_CRT,CSWIFT_R_BAD_KEY_SIZE);
634 char tmpbuf[DECIMAL_SIZE(sw_status)+1];
635 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP_CRT,CSWIFT_R_REQUEST_FAILED);
636 sprintf(tmpbuf, "%ld", sw_status);
637 ERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf);
641 /* Prepare the argument and response */
642 arg.nbytes = BN_bn2bin(a, (unsigned char *)argument->d);
643 arg.value = (unsigned char *)argument->d;
644 res.nbytes = 2 * BN_num_bytes(p);
645 memset(result->d, 0, res.nbytes);
646 res.value = (unsigned char *)result->d;
647 /* Perform the operation */
648 if((sw_status = p_CSwift_SimpleRequest(hac, SW_CMD_MODEXP_CRT, &arg, 1,
651 char tmpbuf[DECIMAL_SIZE(sw_status)+1];
652 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP_CRT,CSWIFT_R_REQUEST_FAILED);
653 sprintf(tmpbuf, "%ld", sw_status);
654 ERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf);
657 /* Convert the response */
658 BN_bin2bn((unsigned char *)result->d, res.nbytes, r);
662 release_context(hac);
667 #ifndef OPENSSL_NO_RSA
668 static int cswift_rsa_mod_exp(BIGNUM *r0, const BIGNUM *I, RSA *rsa)
673 if((ctx = BN_CTX_new()) == NULL)
675 if(!rsa->p || !rsa->q || !rsa->dmp1 || !rsa->dmq1 || !rsa->iqmp)
677 CSWIFTerr(CSWIFT_F_CSWIFT_RSA_MOD_EXP,CSWIFT_R_MISSING_KEY_COMPONENTS);
680 to_return = cswift_mod_exp_crt(r0, I, rsa->p, rsa->q, rsa->dmp1,
681 rsa->dmq1, rsa->iqmp, ctx);
689 /* This function is aliased to mod_exp (with the mont stuff dropped). */
690 static int cswift_mod_exp_mont(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
691 const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx)
693 return cswift_mod_exp(r, a, p, m, ctx);
696 #ifndef OPENSSL_NO_DSA
697 static DSA_SIG *cswift_dsa_sign(const unsigned char *dgst, int dlen, DSA *dsa)
699 SW_CONTEXT_HANDLE hac;
702 SW_LARGENUMBER arg, res;
705 BIGNUM *dsa_p = NULL;
706 BIGNUM *dsa_q = NULL;
707 BIGNUM *dsa_g = NULL;
708 BIGNUM *dsa_key = NULL;
709 BIGNUM *result = NULL;
710 DSA_SIG *to_return = NULL;
713 if((ctx = BN_CTX_new()) == NULL)
715 if(!get_context(&hac))
717 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_SIGN,CSWIFT_R_UNIT_FAILURE);
721 /* Prepare the params */
723 dsa_p = BN_CTX_get(ctx);
724 dsa_q = BN_CTX_get(ctx);
725 dsa_g = BN_CTX_get(ctx);
726 dsa_key = BN_CTX_get(ctx);
727 result = BN_CTX_get(ctx);
730 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_SIGN,CSWIFT_R_BN_CTX_FULL);
733 if(!bn_wexpand(dsa_p, dsa->p->top) ||
734 !bn_wexpand(dsa_q, dsa->q->top) ||
735 !bn_wexpand(dsa_g, dsa->g->top) ||
736 !bn_wexpand(dsa_key, dsa->priv_key->top) ||
737 !bn_wexpand(result, dsa->p->top))
739 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_SIGN,CSWIFT_R_BN_EXPAND_FAIL);
742 sw_param.type = SW_ALG_DSA;
743 sw_param.up.dsa.p.nbytes = BN_bn2bin(dsa->p,
744 (unsigned char *)dsa_p->d);
745 sw_param.up.dsa.p.value = (unsigned char *)dsa_p->d;
746 sw_param.up.dsa.q.nbytes = BN_bn2bin(dsa->q,
747 (unsigned char *)dsa_q->d);
748 sw_param.up.dsa.q.value = (unsigned char *)dsa_q->d;
749 sw_param.up.dsa.g.nbytes = BN_bn2bin(dsa->g,
750 (unsigned char *)dsa_g->d);
751 sw_param.up.dsa.g.value = (unsigned char *)dsa_g->d;
752 sw_param.up.dsa.key.nbytes = BN_bn2bin(dsa->priv_key,
753 (unsigned char *)dsa_key->d);
754 sw_param.up.dsa.key.value = (unsigned char *)dsa_key->d;
755 /* Attach the key params */
756 sw_status = p_CSwift_AttachKeyParam(hac, &sw_param);
761 case SW_ERR_INPUT_SIZE:
762 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_SIGN,CSWIFT_R_BAD_KEY_SIZE);
766 char tmpbuf[DECIMAL_SIZE(sw_status)+1];
767 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_SIGN,CSWIFT_R_REQUEST_FAILED);
768 sprintf(tmpbuf, "%ld", sw_status);
769 ERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf);
773 /* Prepare the argument and response */
775 arg.value = (unsigned char *)dgst;
776 res.nbytes = BN_num_bytes(dsa->p);
777 memset(result->d, 0, res.nbytes);
778 res.value = (unsigned char *)result->d;
779 /* Perform the operation */
780 sw_status = p_CSwift_SimpleRequest(hac, SW_CMD_DSS_SIGN, &arg, 1,
782 if(sw_status != SW_OK)
784 char tmpbuf[DECIMAL_SIZE(sw_status)+1];
785 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_SIGN,CSWIFT_R_REQUEST_FAILED);
786 sprintf(tmpbuf, "%ld", sw_status);
787 ERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf);
790 /* Convert the response */
791 ptr = (unsigned char *)result->d;
792 if((to_return = DSA_SIG_new()) == NULL)
794 to_return->r = BN_bin2bn((unsigned char *)result->d, 20, NULL);
795 to_return->s = BN_bin2bn((unsigned char *)result->d + 20, 20, NULL);
799 release_context(hac);
808 static int cswift_dsa_verify(const unsigned char *dgst, int dgst_len,
809 DSA_SIG *sig, DSA *dsa)
811 SW_CONTEXT_HANDLE hac;
814 SW_LARGENUMBER arg[2], res;
815 unsigned long sig_result;
817 BIGNUM *dsa_p = NULL;
818 BIGNUM *dsa_q = NULL;
819 BIGNUM *dsa_g = NULL;
820 BIGNUM *dsa_key = NULL;
821 BIGNUM *argument = NULL;
825 if((ctx = BN_CTX_new()) == NULL)
827 if(!get_context(&hac))
829 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_VERIFY,CSWIFT_R_UNIT_FAILURE);
833 /* Prepare the params */
835 dsa_p = BN_CTX_get(ctx);
836 dsa_q = BN_CTX_get(ctx);
837 dsa_g = BN_CTX_get(ctx);
838 dsa_key = BN_CTX_get(ctx);
839 argument = BN_CTX_get(ctx);
842 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_VERIFY,CSWIFT_R_BN_CTX_FULL);
845 if(!bn_wexpand(dsa_p, dsa->p->top) ||
846 !bn_wexpand(dsa_q, dsa->q->top) ||
847 !bn_wexpand(dsa_g, dsa->g->top) ||
848 !bn_wexpand(dsa_key, dsa->pub_key->top) ||
849 !bn_wexpand(argument, 40))
851 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_VERIFY,CSWIFT_R_BN_EXPAND_FAIL);
854 sw_param.type = SW_ALG_DSA;
855 sw_param.up.dsa.p.nbytes = BN_bn2bin(dsa->p,
856 (unsigned char *)dsa_p->d);
857 sw_param.up.dsa.p.value = (unsigned char *)dsa_p->d;
858 sw_param.up.dsa.q.nbytes = BN_bn2bin(dsa->q,
859 (unsigned char *)dsa_q->d);
860 sw_param.up.dsa.q.value = (unsigned char *)dsa_q->d;
861 sw_param.up.dsa.g.nbytes = BN_bn2bin(dsa->g,
862 (unsigned char *)dsa_g->d);
863 sw_param.up.dsa.g.value = (unsigned char *)dsa_g->d;
864 sw_param.up.dsa.key.nbytes = BN_bn2bin(dsa->pub_key,
865 (unsigned char *)dsa_key->d);
866 sw_param.up.dsa.key.value = (unsigned char *)dsa_key->d;
867 /* Attach the key params */
868 sw_status = p_CSwift_AttachKeyParam(hac, &sw_param);
873 case SW_ERR_INPUT_SIZE:
874 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_VERIFY,CSWIFT_R_BAD_KEY_SIZE);
878 char tmpbuf[DECIMAL_SIZE(sw_status)+1];
879 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_VERIFY,CSWIFT_R_REQUEST_FAILED);
880 sprintf(tmpbuf, "%ld", sw_status);
881 ERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf);
885 /* Prepare the argument and response */
886 arg[0].nbytes = dgst_len;
887 arg[0].value = (unsigned char *)dgst;
889 arg[1].value = (unsigned char *)argument->d;
890 memset(arg[1].value, 0, 40);
891 BN_bn2bin(sig->r, arg[1].value + 20 - BN_num_bytes(sig->r));
892 BN_bn2bin(sig->s, arg[1].value + 40 - BN_num_bytes(sig->s));
893 res.nbytes = 4; /* unsigned long */
894 res.value = (unsigned char *)(&sig_result);
895 /* Perform the operation */
896 sw_status = p_CSwift_SimpleRequest(hac, SW_CMD_DSS_VERIFY, arg, 2,
898 if(sw_status != SW_OK)
900 char tmpbuf[DECIMAL_SIZE(sw_status)+1];
901 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_VERIFY,CSWIFT_R_REQUEST_FAILED);
902 sprintf(tmpbuf, "%ld", sw_status);
903 ERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf);
906 /* Convert the response */
907 to_return = ((sig_result == 0) ? 0 : 1);
911 release_context(hac);
921 #ifndef OPENSSL_NO_DH
922 /* This function is aliased to mod_exp (with the dh and mont dropped). */
923 static int cswift_mod_exp_dh(const DH *dh, BIGNUM *r,
924 const BIGNUM *a, const BIGNUM *p,
925 const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx)
927 return cswift_mod_exp(r, a, p, m, ctx);
931 /* Random bytes are good */
932 static int cswift_rand_bytes(unsigned char *buf, int num)
934 SW_CONTEXT_HANDLE hac;
936 SW_LARGENUMBER largenum;
939 int to_return = 0; /* assume failure */
941 if (!get_context(&hac))
943 CSWIFTerr(CSWIFT_F_CSWIFT_CTRL, CSWIFT_R_UNIT_FAILURE);
948 while (nbytes < (size_t)num)
950 /* tell CryptoSwift how many bytes we want and where we want it.
951 * Note: - CryptoSwift cannot do more than 4096 bytes at a time.
952 * - CryptoSwift can only do multiple of 32-bits. */
953 largenum.value = (SW_BYTE *) buf + nbytes;
954 if (4096 > num - nbytes)
955 largenum.nbytes = num - nbytes;
957 largenum.nbytes = 4096;
959 swrc = p_CSwift_SimpleRequest(hac, SW_CMD_RAND, NULL, 0, &largenum, 1);
963 CSWIFTerr(CSWIFT_F_CSWIFT_CTRL, CSWIFT_R_REQUEST_FAILED);
964 sprintf(tmpbuf, "%ld", swrc);
965 ERR_add_error_data(2, "CryptoSwift error number is ", tmpbuf);
969 nbytes += largenum.nbytes;
971 to_return = 1; /* success */
975 release_context(hac);
979 static int cswift_rand_status(void)
985 /* This stuff is needed if this ENGINE is being compiled into a self-contained
987 #ifndef OPENSSL_NO_DYNAMIC_ENGINE
988 static int bind_fn(ENGINE *e, const char *id)
990 if(id && (strcmp(id, engine_cswift_id) != 0))
996 IMPLEMENT_DYNAMIC_CHECK_FN()
997 IMPLEMENT_DYNAMIC_BIND_FN(bind_fn)
998 #endif /* OPENSSL_NO_DYNAMIC_ENGINE */
1000 #endif /* !OPENSSL_NO_HW_CSWIFT */
1001 #endif /* !OPENSSL_NO_HW */