1 /* crypto/engine/hw_cswift.c */
3 * Written by Geoff Thorpe (geoff@geoffthorpe.net) for the OpenSSL project
6 /* ====================================================================
7 * Copyright (c) 1999-2001 The OpenSSL Project. All rights reserved.
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in
18 * the documentation and/or other materials provided with the
21 * 3. All advertising materials mentioning features or use of this
22 * software must display the following acknowledgment:
23 * "This product includes software developed by the OpenSSL Project
24 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
26 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
27 * endorse or promote products derived from this software without
28 * prior written permission. For written permission, please contact
29 * licensing@OpenSSL.org.
31 * 5. Products derived from this software may not be called "OpenSSL"
32 * nor may "OpenSSL" appear in their names without prior written
33 * permission of the OpenSSL Project.
35 * 6. Redistributions of any form whatsoever must retain the following
37 * "This product includes software developed by the OpenSSL Project
38 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
40 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
41 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
43 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
44 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
45 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
46 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
47 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
49 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
50 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
51 * OF THE POSSIBILITY OF SUCH DAMAGE.
52 * ====================================================================
54 * This product includes cryptographic software written by Eric Young
55 * (eay@cryptsoft.com). This product includes software written by Tim
56 * Hudson (tjh@cryptsoft.com).
62 #include <openssl/crypto.h>
63 #include <openssl/buffer.h>
64 #include <openssl/dso.h>
65 #include <openssl/engine.h>
66 #ifndef OPENSSL_NO_RSA
67 # include <openssl/rsa.h>
69 #ifndef OPENSSL_NO_DSA
70 # include <openssl/dsa.h>
73 # include <openssl/dh.h>
75 #include <openssl/rand.h>
76 #include <openssl/bn.h>
79 # ifndef OPENSSL_NO_HW_CSWIFT
82 * Attribution notice: Rainbow have generously allowed me to reproduce the
83 * necessary definitions here from their API. This means the support can
84 * build independently of whether application builders have the API or
85 * hardware. This will allow developers to easily produce software that has
86 * latent hardware support for any users that have accelerators installed,
87 * without the developers themselves needing anything extra. I have only
88 * clipped the parts from the CryptoSwift header files that are (or seem)
89 * relevant to the CryptoSwift support code. This is simply to keep the file
90 * sizes reasonable. [Geoff]
95 # include "vendor_defns/cswift.h"
98 # define CSWIFT_LIB_NAME "cswift engine"
99 # include "e_cswift_err.c"
101 # define DECIMAL_SIZE(type) ((sizeof(type)*8+2)/3+1)
103 static int cswift_destroy(ENGINE *e);
104 static int cswift_init(ENGINE *e);
105 static int cswift_finish(ENGINE *e);
106 static int cswift_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f) (void));
107 # ifndef OPENSSL_NO_RSA
108 static int cswift_bn_32copy(SW_LARGENUMBER *out, const BIGNUM *in);
112 static int cswift_mod_exp(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
113 const BIGNUM *m, BN_CTX *ctx);
114 # ifndef OPENSSL_NO_RSA
115 static int cswift_mod_exp_crt(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
116 const BIGNUM *q, const BIGNUM *dmp1,
117 const BIGNUM *dmq1, const BIGNUM *iqmp,
121 # ifndef OPENSSL_NO_RSA
123 static int cswift_rsa_mod_exp(BIGNUM *r0, const BIGNUM *I, RSA *rsa,
125 /* This function is aliased to mod_exp (with the mont stuff dropped). */
126 static int cswift_mod_exp_mont(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
127 const BIGNUM *m, BN_CTX *ctx,
131 # ifndef OPENSSL_NO_DSA
133 static DSA_SIG *cswift_dsa_sign(const unsigned char *dgst, int dlen,
135 static int cswift_dsa_verify(const unsigned char *dgst, int dgst_len,
136 DSA_SIG *sig, DSA *dsa);
139 # ifndef OPENSSL_NO_DH
141 /* This function is alised to mod_exp (with the DH and mont dropped). */
142 static int cswift_mod_exp_dh(const DH *dh, BIGNUM *r,
143 const BIGNUM *a, const BIGNUM *p,
144 const BIGNUM *m, BN_CTX *ctx,
149 static int cswift_rand_bytes(unsigned char *buf, int num);
150 static int cswift_rand_status(void);
152 /* The definitions for control commands specific to this engine */
153 # define CSWIFT_CMD_SO_PATH ENGINE_CMD_BASE
154 static const ENGINE_CMD_DEFN cswift_cmd_defns[] = {
157 "Specifies the path to the 'cswift' shared library",
158 ENGINE_CMD_FLAG_STRING},
162 # ifndef OPENSSL_NO_RSA
163 /* Our internal RSA_METHOD that we provide pointers to */
164 static RSA_METHOD cswift_rsa = {
165 "CryptoSwift RSA method",
182 # ifndef OPENSSL_NO_DSA
183 /* Our internal DSA_METHOD that we provide pointers to */
184 static DSA_METHOD cswift_dsa = {
185 "CryptoSwift DSA method",
187 NULL, /* dsa_sign_setup */
189 NULL, /* dsa_mod_exp */
190 NULL, /* bn_mod_exp */
195 NULL, /* dsa_paramgen */
196 NULL /* dsa_keygen */
200 # ifndef OPENSSL_NO_DH
201 /* Our internal DH_METHOD that we provide pointers to */
202 static DH_METHOD cswift_dh = {
203 "CryptoSwift DH method",
215 static RAND_METHOD cswift_random = {
216 /* "CryptoSwift RAND method", */
225 /* Constants used when creating the ENGINE */
226 static const char *engine_cswift_id = "cswift";
227 static const char *engine_cswift_name = "CryptoSwift hardware engine support";
230 * This internal function is used by ENGINE_cswift() and possibly by the
231 * "dynamic" ENGINE support too
233 static int bind_helper(ENGINE *e)
235 # ifndef OPENSSL_NO_RSA
236 const RSA_METHOD *meth1;
238 # ifndef OPENSSL_NO_DH
239 const DH_METHOD *meth2;
241 if (!ENGINE_set_id(e, engine_cswift_id) ||
242 !ENGINE_set_name(e, engine_cswift_name) ||
243 # ifndef OPENSSL_NO_RSA
244 !ENGINE_set_RSA(e, &cswift_rsa) ||
246 # ifndef OPENSSL_NO_DSA
247 !ENGINE_set_DSA(e, &cswift_dsa) ||
249 # ifndef OPENSSL_NO_DH
250 !ENGINE_set_DH(e, &cswift_dh) ||
252 !ENGINE_set_RAND(e, &cswift_random) ||
253 !ENGINE_set_destroy_function(e, cswift_destroy) ||
254 !ENGINE_set_init_function(e, cswift_init) ||
255 !ENGINE_set_finish_function(e, cswift_finish) ||
256 !ENGINE_set_ctrl_function(e, cswift_ctrl) ||
257 !ENGINE_set_cmd_defns(e, cswift_cmd_defns))
260 # ifndef OPENSSL_NO_RSA
262 * We know that the "PKCS1_SSLeay()" functions hook properly to the
263 * cswift-specific mod_exp and mod_exp_crt so we use those functions. NB:
264 * We don't use ENGINE_openssl() or anything "more generic" because
265 * something like the RSAref code may not hook properly, and if you own
266 * one of these cards then you have the right to do RSA operations on it
269 meth1 = RSA_PKCS1_SSLeay();
270 cswift_rsa.rsa_pub_enc = meth1->rsa_pub_enc;
271 cswift_rsa.rsa_pub_dec = meth1->rsa_pub_dec;
272 cswift_rsa.rsa_priv_enc = meth1->rsa_priv_enc;
273 cswift_rsa.rsa_priv_dec = meth1->rsa_priv_dec;
276 # ifndef OPENSSL_NO_DH
277 /* Much the same for Diffie-Hellman */
278 meth2 = DH_OpenSSL();
279 cswift_dh.generate_key = meth2->generate_key;
280 cswift_dh.compute_key = meth2->compute_key;
283 /* Ensure the cswift error handling is set up */
284 ERR_load_CSWIFT_strings();
288 # ifdef OPENSSL_NO_DYNAMIC_ENGINE
289 static ENGINE *engine_cswift(void)
291 ENGINE *ret = ENGINE_new();
294 if (!bind_helper(ret)) {
301 void ENGINE_load_cswift(void)
303 /* Copied from eng_[openssl|dyn].c */
304 ENGINE *toadd = engine_cswift();
314 * This is a process-global DSO handle used for loading and unloading the
315 * CryptoSwift library. NB: This is only set (or unset) during an init() or
316 * finish() call (reference counts permitting) and they're operating with
317 * global locks, so this should be thread-safe implicitly.
319 static DSO *cswift_dso = NULL;
322 * These are the function pointers that are (un)set when the library has
323 * successfully (un)loaded.
325 t_swAcquireAccContext *p_CSwift_AcquireAccContext = NULL;
326 t_swAttachKeyParam *p_CSwift_AttachKeyParam = NULL;
327 t_swSimpleRequest *p_CSwift_SimpleRequest = NULL;
328 t_swReleaseAccContext *p_CSwift_ReleaseAccContext = NULL;
330 /* Used in the DSO operations. */
331 static const char *CSWIFT_LIBNAME = NULL;
332 static const char *get_CSWIFT_LIBNAME(void)
335 return CSWIFT_LIBNAME;
339 static void free_CSWIFT_LIBNAME(void)
342 OPENSSL_free((void *)CSWIFT_LIBNAME);
343 CSWIFT_LIBNAME = NULL;
346 static long set_CSWIFT_LIBNAME(const char *name)
348 free_CSWIFT_LIBNAME();
349 return (((CSWIFT_LIBNAME = BUF_strdup(name)) != NULL) ? 1 : 0);
352 static const char *CSWIFT_F1 = "swAcquireAccContext";
353 static const char *CSWIFT_F2 = "swAttachKeyParam";
354 static const char *CSWIFT_F3 = "swSimpleRequest";
355 static const char *CSWIFT_F4 = "swReleaseAccContext";
358 * CryptoSwift library functions and mechanics - these are used by the
359 * higher-level functions further down. NB: As and where there's no error
360 * checking, take a look lower down where these functions are called, the
361 * checking and error handling is probably down there.
364 /* utility function to obtain a context */
365 static int get_context(SW_CONTEXT_HANDLE *hac)
369 status = p_CSwift_AcquireAccContext(hac);
375 /* similarly to release one. */
376 static void release_context(SW_CONTEXT_HANDLE hac)
378 p_CSwift_ReleaseAccContext(hac);
381 /* Destructor (complements the "ENGINE_cswift()" constructor) */
382 static int cswift_destroy(ENGINE *e)
384 free_CSWIFT_LIBNAME();
385 ERR_unload_CSWIFT_strings();
389 /* (de)initialisation functions. */
390 static int cswift_init(ENGINE *e)
392 SW_CONTEXT_HANDLE hac;
393 t_swAcquireAccContext *p1;
394 t_swAttachKeyParam *p2;
395 t_swSimpleRequest *p3;
396 t_swReleaseAccContext *p4;
398 if (cswift_dso != NULL) {
399 CSWIFTerr(CSWIFT_F_CSWIFT_INIT, CSWIFT_R_ALREADY_LOADED);
402 /* Attempt to load libswift.so/swift.dll/whatever. */
403 cswift_dso = DSO_load(NULL, get_CSWIFT_LIBNAME(), NULL, 0);
404 if (cswift_dso == NULL) {
405 CSWIFTerr(CSWIFT_F_CSWIFT_INIT, CSWIFT_R_NOT_LOADED);
408 if (!(p1 = (t_swAcquireAccContext *)
409 DSO_bind_func(cswift_dso, CSWIFT_F1)) ||
410 !(p2 = (t_swAttachKeyParam *)
411 DSO_bind_func(cswift_dso, CSWIFT_F2)) ||
412 !(p3 = (t_swSimpleRequest *)
413 DSO_bind_func(cswift_dso, CSWIFT_F3)) ||
414 !(p4 = (t_swReleaseAccContext *)
415 DSO_bind_func(cswift_dso, CSWIFT_F4))) {
416 CSWIFTerr(CSWIFT_F_CSWIFT_INIT, CSWIFT_R_NOT_LOADED);
419 /* Copy the pointers */
420 p_CSwift_AcquireAccContext = p1;
421 p_CSwift_AttachKeyParam = p2;
422 p_CSwift_SimpleRequest = p3;
423 p_CSwift_ReleaseAccContext = p4;
425 * Try and get a context - if not, we may have a DSO but no accelerator!
427 if (!get_context(&hac)) {
428 CSWIFTerr(CSWIFT_F_CSWIFT_INIT, CSWIFT_R_UNIT_FAILURE);
431 release_context(hac);
432 /* Everything's fine. */
436 DSO_free(cswift_dso);
439 p_CSwift_AcquireAccContext = NULL;
440 p_CSwift_AttachKeyParam = NULL;
441 p_CSwift_SimpleRequest = NULL;
442 p_CSwift_ReleaseAccContext = NULL;
446 static int cswift_finish(ENGINE *e)
448 free_CSWIFT_LIBNAME();
449 if (cswift_dso == NULL) {
450 CSWIFTerr(CSWIFT_F_CSWIFT_FINISH, CSWIFT_R_NOT_LOADED);
453 if (!DSO_free(cswift_dso)) {
454 CSWIFTerr(CSWIFT_F_CSWIFT_FINISH, CSWIFT_R_UNIT_FAILURE);
458 p_CSwift_AcquireAccContext = NULL;
459 p_CSwift_AttachKeyParam = NULL;
460 p_CSwift_SimpleRequest = NULL;
461 p_CSwift_ReleaseAccContext = NULL;
465 static int cswift_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f) (void))
467 int initialised = ((cswift_dso == NULL) ? 0 : 1);
469 case CSWIFT_CMD_SO_PATH:
471 CSWIFTerr(CSWIFT_F_CSWIFT_CTRL, ERR_R_PASSED_NULL_PARAMETER);
475 CSWIFTerr(CSWIFT_F_CSWIFT_CTRL, CSWIFT_R_ALREADY_LOADED);
478 return set_CSWIFT_LIBNAME((const char *)p);
482 CSWIFTerr(CSWIFT_F_CSWIFT_CTRL, CSWIFT_R_CTRL_COMMAND_NOT_IMPLEMENTED);
486 /* Un petit mod_exp */
487 static int cswift_mod_exp(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
488 const BIGNUM *m, BN_CTX *ctx)
491 * I need somewhere to store temporary serialised values for use with the
492 * CryptoSwift API calls. A neat cheat - I'll use BIGNUMs from the BN_CTX
493 * but access their arrays directly as byte arrays <grin>. This way I
494 * don't have to clean anything up.
501 SW_LARGENUMBER arg, res;
503 SW_CONTEXT_HANDLE hac;
504 int to_return, acquired;
506 modulus = exponent = argument = result = NULL;
507 to_return = 0; /* expect failure */
510 if (!get_context(&hac)) {
511 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP, CSWIFT_R_UNIT_FAILURE);
515 /* Prepare the params */
517 modulus = BN_CTX_get(ctx);
518 exponent = BN_CTX_get(ctx);
519 argument = BN_CTX_get(ctx);
520 result = BN_CTX_get(ctx);
522 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP, CSWIFT_R_BN_CTX_FULL);
525 if (!bn_wexpand(modulus, m->top) || !bn_wexpand(exponent, p->top) ||
526 !bn_wexpand(argument, a->top) || !bn_wexpand(result, m->top)) {
527 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP, CSWIFT_R_BN_EXPAND_FAIL);
530 sw_param.type = SW_ALG_EXP;
531 sw_param.up.exp.modulus.nbytes = BN_bn2bin(m,
532 (unsigned char *)modulus->d);
533 sw_param.up.exp.modulus.value = (unsigned char *)modulus->d;
534 sw_param.up.exp.exponent.nbytes = BN_bn2bin(p,
535 (unsigned char *)exponent->d);
536 sw_param.up.exp.exponent.value = (unsigned char *)exponent->d;
537 /* Attach the key params */
538 sw_status = p_CSwift_AttachKeyParam(hac, &sw_param);
542 case SW_ERR_INPUT_SIZE:
543 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP, CSWIFT_R_BAD_KEY_SIZE);
547 char tmpbuf[DECIMAL_SIZE(sw_status) + 1];
548 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP, CSWIFT_R_REQUEST_FAILED);
549 sprintf(tmpbuf, "%ld", sw_status);
550 ERR_add_error_data(2, "CryptoSwift error number is ", tmpbuf);
554 /* Prepare the argument and response */
555 arg.nbytes = BN_bn2bin(a, (unsigned char *)argument->d);
556 arg.value = (unsigned char *)argument->d;
557 res.nbytes = BN_num_bytes(m);
558 memset(result->d, 0, res.nbytes);
559 res.value = (unsigned char *)result->d;
560 /* Perform the operation */
561 if ((sw_status = p_CSwift_SimpleRequest(hac, SW_CMD_MODEXP, &arg, 1,
562 &res, 1)) != SW_OK) {
563 char tmpbuf[DECIMAL_SIZE(sw_status) + 1];
564 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP, CSWIFT_R_REQUEST_FAILED);
565 sprintf(tmpbuf, "%ld", sw_status);
566 ERR_add_error_data(2, "CryptoSwift error number is ", tmpbuf);
569 /* Convert the response */
570 BN_bin2bn((unsigned char *)result->d, res.nbytes, r);
574 release_context(hac);
579 # ifndef OPENSSL_NO_RSA
580 int cswift_bn_32copy(SW_LARGENUMBER *out, const BIGNUM *in)
583 int numbytes = BN_num_bytes(in);
586 while (((out->nbytes = (numbytes + mod)) % 32)) {
589 out->value = (unsigned char *)OPENSSL_malloc(out->nbytes);
593 BN_bn2bin(in, &out->value[mod]);
595 memset(out->value, 0, mod);
601 # ifndef OPENSSL_NO_RSA
602 /* Un petit mod_exp chinois */
603 static int cswift_mod_exp_crt(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
604 const BIGNUM *q, const BIGNUM *dmp1,
605 const BIGNUM *dmq1, const BIGNUM *iqmp,
609 SW_LARGENUMBER arg, res;
611 SW_CONTEXT_HANDLE hac;
612 BIGNUM *result = NULL;
613 BIGNUM *argument = NULL;
614 int to_return = 0; /* expect failure */
617 sw_param.up.crt.p.value = NULL;
618 sw_param.up.crt.q.value = NULL;
619 sw_param.up.crt.dmp1.value = NULL;
620 sw_param.up.crt.dmq1.value = NULL;
621 sw_param.up.crt.iqmp.value = NULL;
623 if (!get_context(&hac)) {
624 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP_CRT, CSWIFT_R_UNIT_FAILURE);
629 /* Prepare the params */
632 if (!result || !argument) {
633 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP_CRT, CSWIFT_R_BN_CTX_FULL);
637 sw_param.type = SW_ALG_CRT;
638 /************************************************************************/
643 * Modified by Frederic Giudicelli (deny-all.com) to overcome the
646 * limitation of cswift with values not a multiple of 32
648 /************************************************************************/
649 if (!cswift_bn_32copy(&sw_param.up.crt.p, p)) {
650 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP_CRT, CSWIFT_R_BN_EXPAND_FAIL);
653 if (!cswift_bn_32copy(&sw_param.up.crt.q, q)) {
654 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP_CRT, CSWIFT_R_BN_EXPAND_FAIL);
657 if (!cswift_bn_32copy(&sw_param.up.crt.dmp1, dmp1)) {
658 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP_CRT, CSWIFT_R_BN_EXPAND_FAIL);
661 if (!cswift_bn_32copy(&sw_param.up.crt.dmq1, dmq1)) {
662 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP_CRT, CSWIFT_R_BN_EXPAND_FAIL);
665 if (!cswift_bn_32copy(&sw_param.up.crt.iqmp, iqmp)) {
666 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP_CRT, CSWIFT_R_BN_EXPAND_FAIL);
669 if (!bn_wexpand(argument, a->top) || !bn_wexpand(result, p->top + q->top)) {
670 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP_CRT, CSWIFT_R_BN_EXPAND_FAIL);
674 /* Attach the key params */
675 sw_status = p_CSwift_AttachKeyParam(hac, &sw_param);
679 case SW_ERR_INPUT_SIZE:
680 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP_CRT, CSWIFT_R_BAD_KEY_SIZE);
684 char tmpbuf[DECIMAL_SIZE(sw_status) + 1];
685 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP_CRT, CSWIFT_R_REQUEST_FAILED);
686 sprintf(tmpbuf, "%ld", sw_status);
687 ERR_add_error_data(2, "CryptoSwift error number is ", tmpbuf);
691 /* Prepare the argument and response */
692 arg.nbytes = BN_bn2bin(a, (unsigned char *)argument->d);
693 arg.value = (unsigned char *)argument->d;
694 res.nbytes = 2 * BN_num_bytes(p);
695 memset(result->d, 0, res.nbytes);
696 res.value = (unsigned char *)result->d;
697 /* Perform the operation */
698 if ((sw_status = p_CSwift_SimpleRequest(hac, SW_CMD_MODEXP_CRT, &arg, 1,
699 &res, 1)) != SW_OK) {
700 char tmpbuf[DECIMAL_SIZE(sw_status) + 1];
701 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP_CRT, CSWIFT_R_REQUEST_FAILED);
702 sprintf(tmpbuf, "%ld", sw_status);
703 ERR_add_error_data(2, "CryptoSwift error number is ", tmpbuf);
706 /* Convert the response */
707 BN_bin2bn((unsigned char *)result->d, res.nbytes, r);
710 if (sw_param.up.crt.p.value)
711 OPENSSL_free(sw_param.up.crt.p.value);
712 if (sw_param.up.crt.q.value)
713 OPENSSL_free(sw_param.up.crt.q.value);
714 if (sw_param.up.crt.dmp1.value)
715 OPENSSL_free(sw_param.up.crt.dmp1.value);
716 if (sw_param.up.crt.dmq1.value)
717 OPENSSL_free(sw_param.up.crt.dmq1.value);
718 if (sw_param.up.crt.iqmp.value)
719 OPENSSL_free(sw_param.up.crt.iqmp.value);
725 release_context(hac);
730 # ifndef OPENSSL_NO_RSA
731 static int cswift_rsa_mod_exp(BIGNUM *r0, const BIGNUM *I, RSA *rsa,
735 const RSA_METHOD *def_rsa_method;
737 if (!rsa->p || !rsa->q || !rsa->dmp1 || !rsa->dmq1 || !rsa->iqmp) {
738 CSWIFTerr(CSWIFT_F_CSWIFT_RSA_MOD_EXP,
739 CSWIFT_R_MISSING_KEY_COMPONENTS);
743 /* Try the limits of RSA (2048 bits) */
744 if (BN_num_bytes(rsa->p) > 128 ||
745 BN_num_bytes(rsa->q) > 128 ||
746 BN_num_bytes(rsa->dmp1) > 128 ||
747 BN_num_bytes(rsa->dmq1) > 128 || BN_num_bytes(rsa->iqmp) > 128) {
749 def_rsa_method = RSA_null_method();
752 def_rsa_method = RSA_PKCS1_RSAref();
754 def_rsa_method = RSA_PKCS1_SSLeay();
758 return def_rsa_method->rsa_mod_exp(r0, I, rsa, ctx);
761 to_return = cswift_mod_exp_crt(r0, I, rsa->p, rsa->q, rsa->dmp1,
762 rsa->dmq1, rsa->iqmp, ctx);
767 /* This function is aliased to mod_exp (with the mont stuff dropped). */
768 static int cswift_mod_exp_mont(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
769 const BIGNUM *m, BN_CTX *ctx,
772 const RSA_METHOD *def_rsa_method;
774 /* Try the limits of RSA (2048 bits) */
775 if (BN_num_bytes(r) > 256 ||
776 BN_num_bytes(a) > 256 || BN_num_bytes(m) > 256) {
778 def_rsa_method = RSA_null_method();
781 def_rsa_method = RSA_PKCS1_RSAref();
783 def_rsa_method = RSA_PKCS1_SSLeay();
787 return def_rsa_method->bn_mod_exp(r, a, p, m, ctx, m_ctx);
790 return cswift_mod_exp(r, a, p, m, ctx);
792 # endif /* OPENSSL_NO_RSA */
794 # ifndef OPENSSL_NO_DSA
795 static DSA_SIG *cswift_dsa_sign(const unsigned char *dgst, int dlen, DSA *dsa)
797 SW_CONTEXT_HANDLE hac;
800 SW_LARGENUMBER arg, res;
802 BIGNUM *dsa_p = NULL;
803 BIGNUM *dsa_q = NULL;
804 BIGNUM *dsa_g = NULL;
805 BIGNUM *dsa_key = NULL;
806 BIGNUM *result = NULL;
807 DSA_SIG *to_return = NULL;
810 if ((ctx = BN_CTX_new()) == NULL)
812 if (!get_context(&hac)) {
813 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_SIGN, CSWIFT_R_UNIT_FAILURE);
817 /* Prepare the params */
819 dsa_p = BN_CTX_get(ctx);
820 dsa_q = BN_CTX_get(ctx);
821 dsa_g = BN_CTX_get(ctx);
822 dsa_key = BN_CTX_get(ctx);
823 result = BN_CTX_get(ctx);
825 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_SIGN, CSWIFT_R_BN_CTX_FULL);
828 if (!bn_wexpand(dsa_p, dsa->p->top) ||
829 !bn_wexpand(dsa_q, dsa->q->top) ||
830 !bn_wexpand(dsa_g, dsa->g->top) ||
831 !bn_wexpand(dsa_key, dsa->priv_key->top) ||
832 !bn_wexpand(result, dsa->p->top)) {
833 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_SIGN, CSWIFT_R_BN_EXPAND_FAIL);
836 sw_param.type = SW_ALG_DSA;
837 sw_param.up.dsa.p.nbytes = BN_bn2bin(dsa->p, (unsigned char *)dsa_p->d);
838 sw_param.up.dsa.p.value = (unsigned char *)dsa_p->d;
839 sw_param.up.dsa.q.nbytes = BN_bn2bin(dsa->q, (unsigned char *)dsa_q->d);
840 sw_param.up.dsa.q.value = (unsigned char *)dsa_q->d;
841 sw_param.up.dsa.g.nbytes = BN_bn2bin(dsa->g, (unsigned char *)dsa_g->d);
842 sw_param.up.dsa.g.value = (unsigned char *)dsa_g->d;
843 sw_param.up.dsa.key.nbytes = BN_bn2bin(dsa->priv_key,
844 (unsigned char *)dsa_key->d);
845 sw_param.up.dsa.key.value = (unsigned char *)dsa_key->d;
846 /* Attach the key params */
847 sw_status = p_CSwift_AttachKeyParam(hac, &sw_param);
851 case SW_ERR_INPUT_SIZE:
852 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_SIGN, CSWIFT_R_BAD_KEY_SIZE);
856 char tmpbuf[DECIMAL_SIZE(sw_status) + 1];
857 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_SIGN, CSWIFT_R_REQUEST_FAILED);
858 sprintf(tmpbuf, "%ld", sw_status);
859 ERR_add_error_data(2, "CryptoSwift error number is ", tmpbuf);
863 /* Prepare the argument and response */
865 arg.value = (unsigned char *)dgst;
866 res.nbytes = BN_num_bytes(dsa->p);
867 memset(result->d, 0, res.nbytes);
868 res.value = (unsigned char *)result->d;
869 /* Perform the operation */
870 sw_status = p_CSwift_SimpleRequest(hac, SW_CMD_DSS_SIGN, &arg, 1,
872 if (sw_status != SW_OK) {
873 char tmpbuf[DECIMAL_SIZE(sw_status) + 1];
874 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_SIGN, CSWIFT_R_REQUEST_FAILED);
875 sprintf(tmpbuf, "%ld", sw_status);
876 ERR_add_error_data(2, "CryptoSwift error number is ", tmpbuf);
879 /* Convert the response */
880 if ((to_return = DSA_SIG_new()) == NULL)
882 to_return->r = BN_bin2bn((unsigned char *)result->d, 20, NULL);
883 to_return->s = BN_bin2bn((unsigned char *)result->d + 20, 20, NULL);
887 release_context(hac);
895 static int cswift_dsa_verify(const unsigned char *dgst, int dgst_len,
896 DSA_SIG *sig, DSA *dsa)
898 SW_CONTEXT_HANDLE hac;
901 SW_LARGENUMBER arg[2], res;
902 unsigned long sig_result;
904 BIGNUM *dsa_p = NULL;
905 BIGNUM *dsa_q = NULL;
906 BIGNUM *dsa_g = NULL;
907 BIGNUM *dsa_key = NULL;
908 BIGNUM *argument = NULL;
912 if ((ctx = BN_CTX_new()) == NULL)
914 if (!get_context(&hac)) {
915 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_VERIFY, CSWIFT_R_UNIT_FAILURE);
919 /* Prepare the params */
921 dsa_p = BN_CTX_get(ctx);
922 dsa_q = BN_CTX_get(ctx);
923 dsa_g = BN_CTX_get(ctx);
924 dsa_key = BN_CTX_get(ctx);
925 argument = BN_CTX_get(ctx);
927 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_VERIFY, CSWIFT_R_BN_CTX_FULL);
930 if (!bn_wexpand(dsa_p, dsa->p->top) ||
931 !bn_wexpand(dsa_q, dsa->q->top) ||
932 !bn_wexpand(dsa_g, dsa->g->top) ||
933 !bn_wexpand(dsa_key, dsa->pub_key->top) ||
934 !bn_wexpand(argument, 40)) {
935 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_VERIFY, CSWIFT_R_BN_EXPAND_FAIL);
938 sw_param.type = SW_ALG_DSA;
939 sw_param.up.dsa.p.nbytes = BN_bn2bin(dsa->p, (unsigned char *)dsa_p->d);
940 sw_param.up.dsa.p.value = (unsigned char *)dsa_p->d;
941 sw_param.up.dsa.q.nbytes = BN_bn2bin(dsa->q, (unsigned char *)dsa_q->d);
942 sw_param.up.dsa.q.value = (unsigned char *)dsa_q->d;
943 sw_param.up.dsa.g.nbytes = BN_bn2bin(dsa->g, (unsigned char *)dsa_g->d);
944 sw_param.up.dsa.g.value = (unsigned char *)dsa_g->d;
945 sw_param.up.dsa.key.nbytes = BN_bn2bin(dsa->pub_key,
946 (unsigned char *)dsa_key->d);
947 sw_param.up.dsa.key.value = (unsigned char *)dsa_key->d;
948 /* Attach the key params */
949 sw_status = p_CSwift_AttachKeyParam(hac, &sw_param);
953 case SW_ERR_INPUT_SIZE:
954 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_VERIFY, CSWIFT_R_BAD_KEY_SIZE);
958 char tmpbuf[DECIMAL_SIZE(sw_status) + 1];
959 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_VERIFY, CSWIFT_R_REQUEST_FAILED);
960 sprintf(tmpbuf, "%ld", sw_status);
961 ERR_add_error_data(2, "CryptoSwift error number is ", tmpbuf);
965 /* Prepare the argument and response */
966 arg[0].nbytes = dgst_len;
967 arg[0].value = (unsigned char *)dgst;
969 arg[1].value = (unsigned char *)argument->d;
970 memset(arg[1].value, 0, 40);
971 BN_bn2bin(sig->r, arg[1].value + 20 - BN_num_bytes(sig->r));
972 BN_bn2bin(sig->s, arg[1].value + 40 - BN_num_bytes(sig->s));
973 res.nbytes = 4; /* unsigned long */
974 res.value = (unsigned char *)(&sig_result);
975 /* Perform the operation */
976 sw_status = p_CSwift_SimpleRequest(hac, SW_CMD_DSS_VERIFY, arg, 2,
978 if (sw_status != SW_OK) {
979 char tmpbuf[DECIMAL_SIZE(sw_status) + 1];
980 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_VERIFY, CSWIFT_R_REQUEST_FAILED);
981 sprintf(tmpbuf, "%ld", sw_status);
982 ERR_add_error_data(2, "CryptoSwift error number is ", tmpbuf);
985 /* Convert the response */
986 to_return = ((sig_result == 0) ? 0 : 1);
990 release_context(hac);
999 # ifndef OPENSSL_NO_DH
1000 /* This function is aliased to mod_exp (with the dh and mont dropped). */
1001 static int cswift_mod_exp_dh(const DH *dh, BIGNUM *r,
1002 const BIGNUM *a, const BIGNUM *p,
1003 const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx)
1005 return cswift_mod_exp(r, a, p, m, ctx);
1009 /* Random bytes are good */
1010 static int cswift_rand_bytes(unsigned char *buf, int num)
1012 SW_CONTEXT_HANDLE hac;
1014 SW_LARGENUMBER largenum;
1016 int to_return = 0; /* assume failure */
1017 unsigned char buf32[1024];
1019 if (!get_context(&hac)) {
1020 CSWIFTerr(CSWIFT_F_CSWIFT_RAND_BYTES, CSWIFT_R_UNIT_FAILURE);
1025 /************************************************************************/
1030 * Modified by Frederic Giudicelli (deny-all.com) to overcome the
1033 * limitation of cswift with values not a multiple of 32
1035 /************************************************************************/
1037 while (num >= (int)sizeof(buf32)) {
1038 largenum.value = buf;
1039 largenum.nbytes = sizeof(buf32);
1041 * tell CryptoSwift how many bytes we want and where we want it.
1042 * Note: - CryptoSwift cannot do more than 4096 bytes at a time.
1043 * - CryptoSwift can only do multiple of 32-bits.
1046 p_CSwift_SimpleRequest(hac, SW_CMD_RAND, NULL, 0, &largenum, 1);
1047 if (swrc != SW_OK) {
1049 CSWIFTerr(CSWIFT_F_CSWIFT_RAND_BYTES, CSWIFT_R_REQUEST_FAILED);
1050 sprintf(tmpbuf, "%ld", swrc);
1051 ERR_add_error_data(2, "CryptoSwift error number is ", tmpbuf);
1054 buf += sizeof(buf32);
1055 num -= sizeof(buf32);
1058 largenum.nbytes = sizeof(buf32);
1059 largenum.value = buf32;
1061 p_CSwift_SimpleRequest(hac, SW_CMD_RAND, NULL, 0, &largenum, 1);
1062 if (swrc != SW_OK) {
1064 CSWIFTerr(CSWIFT_F_CSWIFT_RAND_BYTES, CSWIFT_R_REQUEST_FAILED);
1065 sprintf(tmpbuf, "%ld", swrc);
1066 ERR_add_error_data(2, "CryptoSwift error number is ", tmpbuf);
1069 memcpy(buf, largenum.value, num);
1072 to_return = 1; /* success */
1075 release_context(hac);
1080 static int cswift_rand_status(void)
1086 * This stuff is needed if this ENGINE is being compiled into a
1087 * self-contained shared-library.
1089 # ifndef OPENSSL_NO_DYNAMIC_ENGINE
1090 static int bind_fn(ENGINE *e, const char *id)
1092 if (id && (strcmp(id, engine_cswift_id) != 0))
1094 if (!bind_helper(e))
1099 IMPLEMENT_DYNAMIC_CHECK_FN()
1100 IMPLEMENT_DYNAMIC_BIND_FN(bind_fn)
1101 # endif /* OPENSSL_NO_DYNAMIC_ENGINE */
1102 # endif /* !OPENSSL_NO_HW_CSWIFT */
1103 #endif /* !OPENSSL_NO_HW */