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>
65 #include <openssl/rsa.h>
66 #include <openssl/dsa.h>
67 #include <openssl/dh.h>
68 #include <openssl/rand.h>
69 #include <openssl/bn.h>
72 #ifndef OPENSSL_NO_HW_CSWIFT
74 /* Attribution notice: Rainbow have generously allowed me to reproduce
75 * the necessary definitions here from their API. This means the support
76 * can build independently of whether application builders have the
77 * API or hardware. This will allow developers to easily produce software
78 * that has latent hardware support for any users that have accelerators
79 * installed, without the developers themselves needing anything extra.
81 * I have only clipped the parts from the CryptoSwift header files that
82 * are (or seem) relevant to the CryptoSwift support code. This is
83 * simply to keep the file sizes reasonable.
89 #include "vendor_defns/cswift.h"
92 #define CSWIFT_LIB_NAME "cswift engine"
93 #include "e_cswift_err.c"
95 #define DECIMAL_SIZE(type) ((sizeof(type)*8+2)/3+1)
97 static int cswift_destroy(ENGINE *e);
98 static int cswift_init(ENGINE *e);
99 static int cswift_finish(ENGINE *e);
100 static int cswift_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f)(void));
103 static int cswift_mod_exp(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
104 const BIGNUM *m, BN_CTX *ctx);
105 static int cswift_mod_exp_crt(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
106 const BIGNUM *q, const BIGNUM *dmp1, const BIGNUM *dmq1,
107 const BIGNUM *iqmp, BN_CTX *ctx);
109 #ifndef OPENSSL_NO_RSA
111 static int cswift_rsa_mod_exp(BIGNUM *r0, const BIGNUM *I, RSA *rsa, BN_CTX *ctx);
113 /* This function is aliased to mod_exp (with the mont stuff dropped). */
114 static int cswift_mod_exp_mont(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
115 const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx);
117 #ifndef OPENSSL_NO_DSA
119 static DSA_SIG *cswift_dsa_sign(const unsigned char *dgst, int dlen, DSA *dsa);
120 static int cswift_dsa_verify(const unsigned char *dgst, int dgst_len,
121 DSA_SIG *sig, DSA *dsa);
124 #ifndef OPENSSL_NO_DH
126 /* This function is alised to mod_exp (with the DH and mont dropped). */
127 static int cswift_mod_exp_dh(const DH *dh, BIGNUM *r,
128 const BIGNUM *a, const BIGNUM *p,
129 const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx);
133 static int cswift_rand_bytes(unsigned char *buf, int num);
134 static int cswift_rand_status(void);
136 /* The definitions for control commands specific to this engine */
137 #define CSWIFT_CMD_SO_PATH ENGINE_CMD_BASE
138 static const ENGINE_CMD_DEFN cswift_cmd_defns[] = {
141 "Specifies the path to the 'cswift' shared library",
142 ENGINE_CMD_FLAG_STRING},
146 #ifndef OPENSSL_NO_RSA
147 /* Our internal RSA_METHOD that we provide pointers to */
148 static RSA_METHOD cswift_rsa =
150 "CryptoSwift RSA method",
167 #ifndef OPENSSL_NO_DSA
168 /* Our internal DSA_METHOD that we provide pointers to */
169 static DSA_METHOD cswift_dsa =
171 "CryptoSwift DSA method",
173 NULL, /* dsa_sign_setup */
175 NULL, /* dsa_mod_exp */
176 NULL, /* bn_mod_exp */
181 NULL, /* dsa_paramgen */
182 NULL /* dsa_keygen */
186 #ifndef OPENSSL_NO_DH
187 /* Our internal DH_METHOD that we provide pointers to */
188 static DH_METHOD cswift_dh =
190 "CryptoSwift DH method",
202 static RAND_METHOD cswift_random =
204 /* "CryptoSwift RAND method", */
214 /* Constants used when creating the ENGINE */
215 static const char *engine_cswift_id = "cswift";
216 static const char *engine_cswift_name = "CryptoSwift hardware engine support";
218 /* This internal function is used by ENGINE_cswift() and possibly by the
219 * "dynamic" ENGINE support too */
220 static int bind_helper(ENGINE *e)
222 #ifndef OPENSSL_NO_RSA
223 const RSA_METHOD *meth1;
225 #ifndef OPENSSL_NO_DH
226 const DH_METHOD *meth2;
228 if(!ENGINE_set_id(e, engine_cswift_id) ||
229 !ENGINE_set_name(e, engine_cswift_name) ||
230 #ifndef OPENSSL_NO_RSA
231 !ENGINE_set_RSA(e, &cswift_rsa) ||
233 #ifndef OPENSSL_NO_DSA
234 !ENGINE_set_DSA(e, &cswift_dsa) ||
236 #ifndef OPENSSL_NO_DH
237 !ENGINE_set_DH(e, &cswift_dh) ||
239 !ENGINE_set_RAND(e, &cswift_random) ||
240 !ENGINE_set_destroy_function(e, cswift_destroy) ||
241 !ENGINE_set_init_function(e, cswift_init) ||
242 !ENGINE_set_finish_function(e, cswift_finish) ||
243 !ENGINE_set_ctrl_function(e, cswift_ctrl) ||
244 !ENGINE_set_cmd_defns(e, cswift_cmd_defns))
247 #ifndef OPENSSL_NO_RSA
248 /* We know that the "PKCS1_SSLeay()" functions hook properly
249 * to the cswift-specific mod_exp and mod_exp_crt so we use
250 * those functions. NB: We don't use ENGINE_openssl() or
251 * anything "more generic" because something like the RSAref
252 * code may not hook properly, and if you own one of these
253 * cards then you have the right to do RSA operations on it
255 meth1 = RSA_PKCS1_SSLeay();
256 cswift_rsa.rsa_pub_enc = meth1->rsa_pub_enc;
257 cswift_rsa.rsa_pub_dec = meth1->rsa_pub_dec;
258 cswift_rsa.rsa_priv_enc = meth1->rsa_priv_enc;
259 cswift_rsa.rsa_priv_dec = meth1->rsa_priv_dec;
262 #ifndef OPENSSL_NO_DH
263 /* Much the same for Diffie-Hellman */
264 meth2 = DH_OpenSSL();
265 cswift_dh.generate_key = meth2->generate_key;
266 cswift_dh.compute_key = meth2->compute_key;
269 /* Ensure the cswift error handling is set up */
270 ERR_load_CSWIFT_strings();
274 #ifdef OPENSSL_NO_DYNAMIC_ENGINE
275 static ENGINE *engine_cswift(void)
277 ENGINE *ret = ENGINE_new();
280 if(!bind_helper(ret))
288 void ENGINE_load_cswift(void)
290 /* Copied from eng_[openssl|dyn].c */
291 ENGINE *toadd = engine_cswift();
299 /* This is a process-global DSO handle used for loading and unloading
300 * the CryptoSwift library. NB: This is only set (or unset) during an
301 * init() or finish() call (reference counts permitting) and they're
302 * operating with global locks, so this should be thread-safe
304 static DSO *cswift_dso = NULL;
306 /* These are the function pointers that are (un)set when the library has
307 * successfully (un)loaded. */
308 t_swAcquireAccContext *p_CSwift_AcquireAccContext = NULL;
309 t_swAttachKeyParam *p_CSwift_AttachKeyParam = NULL;
310 t_swSimpleRequest *p_CSwift_SimpleRequest = NULL;
311 t_swReleaseAccContext *p_CSwift_ReleaseAccContext = NULL;
313 /* Used in the DSO operations. */
314 static const char *CSWIFT_LIBNAME = NULL;
315 static const char *get_CSWIFT_LIBNAME(void)
318 return CSWIFT_LIBNAME;
321 static void free_CSWIFT_LIBNAME(void)
324 OPENSSL_free((void*)CSWIFT_LIBNAME);
325 CSWIFT_LIBNAME = NULL;
327 static long set_CSWIFT_LIBNAME(const char *name)
329 free_CSWIFT_LIBNAME();
330 return (((CSWIFT_LIBNAME = BUF_strdup(name)) != NULL) ? 1 : 0);
332 static const char *CSWIFT_F1 = "swAcquireAccContext";
333 static const char *CSWIFT_F2 = "swAttachKeyParam";
334 static const char *CSWIFT_F3 = "swSimpleRequest";
335 static const char *CSWIFT_F4 = "swReleaseAccContext";
338 /* CryptoSwift library functions and mechanics - these are used by the
339 * higher-level functions further down. NB: As and where there's no
340 * error checking, take a look lower down where these functions are
341 * called, the checking and error handling is probably down there. */
343 /* utility function to obtain a context */
344 static int get_context(SW_CONTEXT_HANDLE *hac)
348 status = p_CSwift_AcquireAccContext(hac);
354 /* similarly to release one. */
355 static void release_context(SW_CONTEXT_HANDLE hac)
357 p_CSwift_ReleaseAccContext(hac);
360 /* Destructor (complements the "ENGINE_cswift()" constructor) */
361 static int cswift_destroy(ENGINE *e)
363 free_CSWIFT_LIBNAME();
364 ERR_unload_CSWIFT_strings();
368 /* (de)initialisation functions. */
369 static int cswift_init(ENGINE *e)
371 SW_CONTEXT_HANDLE hac;
372 t_swAcquireAccContext *p1;
373 t_swAttachKeyParam *p2;
374 t_swSimpleRequest *p3;
375 t_swReleaseAccContext *p4;
377 if(cswift_dso != NULL)
379 CSWIFTerr(CSWIFT_F_CSWIFT_INIT,CSWIFT_R_ALREADY_LOADED);
382 /* Attempt to load libswift.so/swift.dll/whatever. */
383 cswift_dso = DSO_load(NULL, get_CSWIFT_LIBNAME(), NULL, 0);
384 if(cswift_dso == NULL)
386 CSWIFTerr(CSWIFT_F_CSWIFT_INIT,CSWIFT_R_NOT_LOADED);
389 if(!(p1 = (t_swAcquireAccContext *)
390 DSO_bind_func(cswift_dso, CSWIFT_F1)) ||
391 !(p2 = (t_swAttachKeyParam *)
392 DSO_bind_func(cswift_dso, CSWIFT_F2)) ||
393 !(p3 = (t_swSimpleRequest *)
394 DSO_bind_func(cswift_dso, CSWIFT_F3)) ||
395 !(p4 = (t_swReleaseAccContext *)
396 DSO_bind_func(cswift_dso, CSWIFT_F4)))
398 CSWIFTerr(CSWIFT_F_CSWIFT_INIT,CSWIFT_R_NOT_LOADED);
401 /* Copy the pointers */
402 p_CSwift_AcquireAccContext = p1;
403 p_CSwift_AttachKeyParam = p2;
404 p_CSwift_SimpleRequest = p3;
405 p_CSwift_ReleaseAccContext = p4;
406 /* Try and get a context - if not, we may have a DSO but no
408 if(!get_context(&hac))
410 CSWIFTerr(CSWIFT_F_CSWIFT_INIT,CSWIFT_R_UNIT_FAILURE);
413 release_context(hac);
414 /* Everything's fine. */
418 DSO_free(cswift_dso);
419 p_CSwift_AcquireAccContext = NULL;
420 p_CSwift_AttachKeyParam = NULL;
421 p_CSwift_SimpleRequest = NULL;
422 p_CSwift_ReleaseAccContext = NULL;
426 static int cswift_finish(ENGINE *e)
428 free_CSWIFT_LIBNAME();
429 if(cswift_dso == NULL)
431 CSWIFTerr(CSWIFT_F_CSWIFT_FINISH,CSWIFT_R_NOT_LOADED);
434 if(!DSO_free(cswift_dso))
436 CSWIFTerr(CSWIFT_F_CSWIFT_FINISH,CSWIFT_R_UNIT_FAILURE);
440 p_CSwift_AcquireAccContext = NULL;
441 p_CSwift_AttachKeyParam = NULL;
442 p_CSwift_SimpleRequest = NULL;
443 p_CSwift_ReleaseAccContext = NULL;
447 static int cswift_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f)(void))
449 int initialised = ((cswift_dso == NULL) ? 0 : 1);
452 case CSWIFT_CMD_SO_PATH:
455 CSWIFTerr(CSWIFT_F_CSWIFT_CTRL,ERR_R_PASSED_NULL_PARAMETER);
460 CSWIFTerr(CSWIFT_F_CSWIFT_CTRL,CSWIFT_R_ALREADY_LOADED);
463 return set_CSWIFT_LIBNAME((const char *)p);
467 CSWIFTerr(CSWIFT_F_CSWIFT_CTRL,CSWIFT_R_CTRL_COMMAND_NOT_IMPLEMENTED);
471 /* Un petit mod_exp */
472 static int cswift_mod_exp(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
473 const BIGNUM *m, BN_CTX *ctx)
475 /* I need somewhere to store temporary serialised values for
476 * use with the CryptoSwift API calls. A neat cheat - I'll use
477 * BIGNUMs from the BN_CTX but access their arrays directly as
478 * byte arrays <grin>. This way I don't have to clean anything
485 SW_LARGENUMBER arg, res;
487 SW_CONTEXT_HANDLE hac;
488 int to_return, acquired;
490 modulus = exponent = argument = result = NULL;
491 to_return = 0; /* expect failure */
494 if(!get_context(&hac))
496 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP,CSWIFT_R_UNIT_FAILURE);
500 /* Prepare the params */
502 modulus = BN_CTX_get(ctx);
503 exponent = BN_CTX_get(ctx);
504 argument = BN_CTX_get(ctx);
505 result = BN_CTX_get(ctx);
508 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP,CSWIFT_R_BN_CTX_FULL);
511 if(!bn_wexpand(modulus, m->top) || !bn_wexpand(exponent, p->top) ||
512 !bn_wexpand(argument, a->top) || !bn_wexpand(result, m->top))
514 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP,CSWIFT_R_BN_EXPAND_FAIL);
517 sw_param.type = SW_ALG_EXP;
518 sw_param.up.exp.modulus.nbytes = BN_bn2bin(m,
519 (unsigned char *)modulus->d);
520 sw_param.up.exp.modulus.value = (unsigned char *)modulus->d;
521 sw_param.up.exp.exponent.nbytes = BN_bn2bin(p,
522 (unsigned char *)exponent->d);
523 sw_param.up.exp.exponent.value = (unsigned char *)exponent->d;
524 /* Attach the key params */
525 sw_status = p_CSwift_AttachKeyParam(hac, &sw_param);
530 case SW_ERR_INPUT_SIZE:
531 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP,CSWIFT_R_BAD_KEY_SIZE);
535 char tmpbuf[DECIMAL_SIZE(sw_status)+1];
536 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP,CSWIFT_R_REQUEST_FAILED);
537 sprintf(tmpbuf, "%ld", sw_status);
538 ERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf);
542 /* Prepare the argument and response */
543 arg.nbytes = BN_bn2bin(a, (unsigned char *)argument->d);
544 arg.value = (unsigned char *)argument->d;
545 res.nbytes = BN_num_bytes(m);
546 memset(result->d, 0, res.nbytes);
547 res.value = (unsigned char *)result->d;
548 /* Perform the operation */
549 if((sw_status = p_CSwift_SimpleRequest(hac, SW_CMD_MODEXP, &arg, 1,
552 char tmpbuf[DECIMAL_SIZE(sw_status)+1];
553 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP,CSWIFT_R_REQUEST_FAILED);
554 sprintf(tmpbuf, "%ld", sw_status);
555 ERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf);
558 /* Convert the response */
559 BN_bin2bn((unsigned char *)result->d, res.nbytes, r);
563 release_context(hac);
568 /* Un petit mod_exp chinois */
569 static int cswift_mod_exp_crt(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
570 const BIGNUM *q, const BIGNUM *dmp1,
571 const BIGNUM *dmq1, const BIGNUM *iqmp, BN_CTX *ctx)
574 SW_LARGENUMBER arg, res;
576 SW_CONTEXT_HANDLE hac;
577 BIGNUM *rsa_p = NULL;
578 BIGNUM *rsa_q = NULL;
579 BIGNUM *rsa_dmp1 = NULL;
580 BIGNUM *rsa_dmq1 = NULL;
581 BIGNUM *rsa_iqmp = NULL;
582 BIGNUM *argument = NULL;
583 BIGNUM *result = NULL;
584 int to_return = 0; /* expect failure */
587 if(!get_context(&hac))
589 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP_CRT,CSWIFT_R_UNIT_FAILURE);
593 /* Prepare the params */
595 rsa_p = BN_CTX_get(ctx);
596 rsa_q = BN_CTX_get(ctx);
597 rsa_dmp1 = BN_CTX_get(ctx);
598 rsa_dmq1 = BN_CTX_get(ctx);
599 rsa_iqmp = BN_CTX_get(ctx);
600 argument = BN_CTX_get(ctx);
601 result = BN_CTX_get(ctx);
604 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP_CRT,CSWIFT_R_BN_CTX_FULL);
607 if(!bn_wexpand(rsa_p, p->top) || !bn_wexpand(rsa_q, q->top) ||
608 !bn_wexpand(rsa_dmp1, dmp1->top) ||
609 !bn_wexpand(rsa_dmq1, dmq1->top) ||
610 !bn_wexpand(rsa_iqmp, iqmp->top) ||
611 !bn_wexpand(argument, a->top) ||
612 !bn_wexpand(result, p->top + q->top))
614 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP_CRT,CSWIFT_R_BN_EXPAND_FAIL);
617 sw_param.type = SW_ALG_CRT;
618 sw_param.up.crt.p.nbytes = BN_bn2bin(p, (unsigned char *)rsa_p->d);
619 sw_param.up.crt.p.value = (unsigned char *)rsa_p->d;
620 sw_param.up.crt.q.nbytes = BN_bn2bin(q, (unsigned char *)rsa_q->d);
621 sw_param.up.crt.q.value = (unsigned char *)rsa_q->d;
622 sw_param.up.crt.dmp1.nbytes = BN_bn2bin(dmp1,
623 (unsigned char *)rsa_dmp1->d);
624 sw_param.up.crt.dmp1.value = (unsigned char *)rsa_dmp1->d;
625 sw_param.up.crt.dmq1.nbytes = BN_bn2bin(dmq1,
626 (unsigned char *)rsa_dmq1->d);
627 sw_param.up.crt.dmq1.value = (unsigned char *)rsa_dmq1->d;
628 sw_param.up.crt.iqmp.nbytes = BN_bn2bin(iqmp,
629 (unsigned char *)rsa_iqmp->d);
630 sw_param.up.crt.iqmp.value = (unsigned char *)rsa_iqmp->d;
631 /* Attach the key params */
632 sw_status = p_CSwift_AttachKeyParam(hac, &sw_param);
637 case SW_ERR_INPUT_SIZE:
638 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP_CRT,CSWIFT_R_BAD_KEY_SIZE);
642 char tmpbuf[DECIMAL_SIZE(sw_status)+1];
643 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP_CRT,CSWIFT_R_REQUEST_FAILED);
644 sprintf(tmpbuf, "%ld", sw_status);
645 ERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf);
649 /* Prepare the argument and response */
650 arg.nbytes = BN_bn2bin(a, (unsigned char *)argument->d);
651 arg.value = (unsigned char *)argument->d;
652 res.nbytes = 2 * BN_num_bytes(p);
653 memset(result->d, 0, res.nbytes);
654 res.value = (unsigned char *)result->d;
655 /* Perform the operation */
656 if((sw_status = p_CSwift_SimpleRequest(hac, SW_CMD_MODEXP_CRT, &arg, 1,
659 char tmpbuf[DECIMAL_SIZE(sw_status)+1];
660 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP_CRT,CSWIFT_R_REQUEST_FAILED);
661 sprintf(tmpbuf, "%ld", sw_status);
662 ERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf);
665 /* Convert the response */
666 BN_bin2bn((unsigned char *)result->d, res.nbytes, r);
670 release_context(hac);
675 #ifndef OPENSSL_NO_RSA
676 static int cswift_rsa_mod_exp(BIGNUM *r0, const BIGNUM *I, RSA *rsa, BN_CTX *ctx)
680 if(!rsa->p || !rsa->q || !rsa->dmp1 || !rsa->dmq1 || !rsa->iqmp)
682 CSWIFTerr(CSWIFT_F_CSWIFT_RSA_MOD_EXP,CSWIFT_R_MISSING_KEY_COMPONENTS);
685 to_return = cswift_mod_exp_crt(r0, I, rsa->p, rsa->q, rsa->dmp1,
686 rsa->dmq1, rsa->iqmp, ctx);
692 /* This function is aliased to mod_exp (with the mont stuff dropped). */
693 static int cswift_mod_exp_mont(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
694 const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx)
696 return cswift_mod_exp(r, a, p, m, ctx);
699 #ifndef OPENSSL_NO_DSA
700 static DSA_SIG *cswift_dsa_sign(const unsigned char *dgst, int dlen, DSA *dsa)
702 SW_CONTEXT_HANDLE hac;
705 SW_LARGENUMBER arg, res;
708 BIGNUM *dsa_p = NULL;
709 BIGNUM *dsa_q = NULL;
710 BIGNUM *dsa_g = NULL;
711 BIGNUM *dsa_key = NULL;
712 BIGNUM *result = NULL;
713 DSA_SIG *to_return = NULL;
716 if((ctx = BN_CTX_new()) == NULL)
718 if(!get_context(&hac))
720 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_SIGN,CSWIFT_R_UNIT_FAILURE);
724 /* Prepare the params */
726 dsa_p = BN_CTX_get(ctx);
727 dsa_q = BN_CTX_get(ctx);
728 dsa_g = BN_CTX_get(ctx);
729 dsa_key = BN_CTX_get(ctx);
730 result = BN_CTX_get(ctx);
733 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_SIGN,CSWIFT_R_BN_CTX_FULL);
736 if(!bn_wexpand(dsa_p, dsa->p->top) ||
737 !bn_wexpand(dsa_q, dsa->q->top) ||
738 !bn_wexpand(dsa_g, dsa->g->top) ||
739 !bn_wexpand(dsa_key, dsa->priv_key->top) ||
740 !bn_wexpand(result, dsa->p->top))
742 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_SIGN,CSWIFT_R_BN_EXPAND_FAIL);
745 sw_param.type = SW_ALG_DSA;
746 sw_param.up.dsa.p.nbytes = BN_bn2bin(dsa->p,
747 (unsigned char *)dsa_p->d);
748 sw_param.up.dsa.p.value = (unsigned char *)dsa_p->d;
749 sw_param.up.dsa.q.nbytes = BN_bn2bin(dsa->q,
750 (unsigned char *)dsa_q->d);
751 sw_param.up.dsa.q.value = (unsigned char *)dsa_q->d;
752 sw_param.up.dsa.g.nbytes = BN_bn2bin(dsa->g,
753 (unsigned char *)dsa_g->d);
754 sw_param.up.dsa.g.value = (unsigned char *)dsa_g->d;
755 sw_param.up.dsa.key.nbytes = BN_bn2bin(dsa->priv_key,
756 (unsigned char *)dsa_key->d);
757 sw_param.up.dsa.key.value = (unsigned char *)dsa_key->d;
758 /* Attach the key params */
759 sw_status = p_CSwift_AttachKeyParam(hac, &sw_param);
764 case SW_ERR_INPUT_SIZE:
765 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_SIGN,CSWIFT_R_BAD_KEY_SIZE);
769 char tmpbuf[DECIMAL_SIZE(sw_status)+1];
770 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_SIGN,CSWIFT_R_REQUEST_FAILED);
771 sprintf(tmpbuf, "%ld", sw_status);
772 ERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf);
776 /* Prepare the argument and response */
778 arg.value = (unsigned char *)dgst;
779 res.nbytes = BN_num_bytes(dsa->p);
780 memset(result->d, 0, res.nbytes);
781 res.value = (unsigned char *)result->d;
782 /* Perform the operation */
783 sw_status = p_CSwift_SimpleRequest(hac, SW_CMD_DSS_SIGN, &arg, 1,
785 if(sw_status != SW_OK)
787 char tmpbuf[DECIMAL_SIZE(sw_status)+1];
788 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_SIGN,CSWIFT_R_REQUEST_FAILED);
789 sprintf(tmpbuf, "%ld", sw_status);
790 ERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf);
793 /* Convert the response */
794 ptr = (unsigned char *)result->d;
795 if((to_return = DSA_SIG_new()) == NULL)
797 to_return->r = BN_bin2bn((unsigned char *)result->d, 20, NULL);
798 to_return->s = BN_bin2bn((unsigned char *)result->d + 20, 20, NULL);
802 release_context(hac);
811 static int cswift_dsa_verify(const unsigned char *dgst, int dgst_len,
812 DSA_SIG *sig, DSA *dsa)
814 SW_CONTEXT_HANDLE hac;
817 SW_LARGENUMBER arg[2], res;
818 unsigned long sig_result;
820 BIGNUM *dsa_p = NULL;
821 BIGNUM *dsa_q = NULL;
822 BIGNUM *dsa_g = NULL;
823 BIGNUM *dsa_key = NULL;
824 BIGNUM *argument = NULL;
828 if((ctx = BN_CTX_new()) == NULL)
830 if(!get_context(&hac))
832 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_VERIFY,CSWIFT_R_UNIT_FAILURE);
836 /* Prepare the params */
838 dsa_p = BN_CTX_get(ctx);
839 dsa_q = BN_CTX_get(ctx);
840 dsa_g = BN_CTX_get(ctx);
841 dsa_key = BN_CTX_get(ctx);
842 argument = BN_CTX_get(ctx);
845 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_VERIFY,CSWIFT_R_BN_CTX_FULL);
848 if(!bn_wexpand(dsa_p, dsa->p->top) ||
849 !bn_wexpand(dsa_q, dsa->q->top) ||
850 !bn_wexpand(dsa_g, dsa->g->top) ||
851 !bn_wexpand(dsa_key, dsa->pub_key->top) ||
852 !bn_wexpand(argument, 40))
854 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_VERIFY,CSWIFT_R_BN_EXPAND_FAIL);
857 sw_param.type = SW_ALG_DSA;
858 sw_param.up.dsa.p.nbytes = BN_bn2bin(dsa->p,
859 (unsigned char *)dsa_p->d);
860 sw_param.up.dsa.p.value = (unsigned char *)dsa_p->d;
861 sw_param.up.dsa.q.nbytes = BN_bn2bin(dsa->q,
862 (unsigned char *)dsa_q->d);
863 sw_param.up.dsa.q.value = (unsigned char *)dsa_q->d;
864 sw_param.up.dsa.g.nbytes = BN_bn2bin(dsa->g,
865 (unsigned char *)dsa_g->d);
866 sw_param.up.dsa.g.value = (unsigned char *)dsa_g->d;
867 sw_param.up.dsa.key.nbytes = BN_bn2bin(dsa->pub_key,
868 (unsigned char *)dsa_key->d);
869 sw_param.up.dsa.key.value = (unsigned char *)dsa_key->d;
870 /* Attach the key params */
871 sw_status = p_CSwift_AttachKeyParam(hac, &sw_param);
876 case SW_ERR_INPUT_SIZE:
877 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_VERIFY,CSWIFT_R_BAD_KEY_SIZE);
881 char tmpbuf[DECIMAL_SIZE(sw_status)+1];
882 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_VERIFY,CSWIFT_R_REQUEST_FAILED);
883 sprintf(tmpbuf, "%ld", sw_status);
884 ERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf);
888 /* Prepare the argument and response */
889 arg[0].nbytes = dgst_len;
890 arg[0].value = (unsigned char *)dgst;
892 arg[1].value = (unsigned char *)argument->d;
893 memset(arg[1].value, 0, 40);
894 BN_bn2bin(sig->r, arg[1].value + 20 - BN_num_bytes(sig->r));
895 BN_bn2bin(sig->s, arg[1].value + 40 - BN_num_bytes(sig->s));
896 res.nbytes = 4; /* unsigned long */
897 res.value = (unsigned char *)(&sig_result);
898 /* Perform the operation */
899 sw_status = p_CSwift_SimpleRequest(hac, SW_CMD_DSS_VERIFY, arg, 2,
901 if(sw_status != SW_OK)
903 char tmpbuf[DECIMAL_SIZE(sw_status)+1];
904 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_VERIFY,CSWIFT_R_REQUEST_FAILED);
905 sprintf(tmpbuf, "%ld", sw_status);
906 ERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf);
909 /* Convert the response */
910 to_return = ((sig_result == 0) ? 0 : 1);
914 release_context(hac);
924 #ifndef OPENSSL_NO_DH
925 /* This function is aliased to mod_exp (with the dh and mont dropped). */
926 static int cswift_mod_exp_dh(const DH *dh, BIGNUM *r,
927 const BIGNUM *a, const BIGNUM *p,
928 const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx)
930 return cswift_mod_exp(r, a, p, m, ctx);
934 /* Random bytes are good */
935 static int cswift_rand_bytes(unsigned char *buf, int num)
937 SW_CONTEXT_HANDLE hac;
939 SW_LARGENUMBER largenum;
942 int to_return = 0; /* assume failure */
944 if (!get_context(&hac))
946 CSWIFTerr(CSWIFT_F_CSWIFT_RAND_BYTES, CSWIFT_R_UNIT_FAILURE);
951 while (nbytes < (size_t)num)
953 /* tell CryptoSwift how many bytes we want and where we want it.
954 * Note: - CryptoSwift cannot do more than 4096 bytes at a time.
955 * - CryptoSwift can only do multiple of 32-bits. */
956 largenum.value = (SW_BYTE *) buf + nbytes;
957 if (4096 > num - nbytes)
958 largenum.nbytes = num - nbytes;
960 largenum.nbytes = 4096;
962 swrc = p_CSwift_SimpleRequest(hac, SW_CMD_RAND, NULL, 0, &largenum, 1);
966 CSWIFTerr(CSWIFT_F_CSWIFT_RAND_BYTES, CSWIFT_R_REQUEST_FAILED);
967 sprintf(tmpbuf, "%ld", swrc);
968 ERR_add_error_data(2, "CryptoSwift error number is ", tmpbuf);
972 nbytes += largenum.nbytes;
974 to_return = 1; /* success */
978 release_context(hac);
982 static int cswift_rand_status(void)
988 /* This stuff is needed if this ENGINE is being compiled into a self-contained
990 #ifndef OPENSSL_NO_DYNAMIC_ENGINE
991 static int bind_fn(ENGINE *e, const char *id)
993 if(id && (strcmp(id, engine_cswift_id) != 0))
999 IMPLEMENT_DYNAMIC_CHECK_FN()
1000 IMPLEMENT_DYNAMIC_BIND_FN(bind_fn)
1001 #endif /* OPENSSL_NO_DYNAMIC_ENGINE */
1003 #endif /* !OPENSSL_NO_HW_CSWIFT */
1004 #endif /* !OPENSSL_NO_HW */