crypto/engine/hw_cswift.c

   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 The OpenSSL Project.  All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  *
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  *
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in
  17  *    the documentation and/or other materials provided with the
  18  *    distribution.
  19  *
  20  * 3. All advertising materials mentioning features or use of this
  21  *    software must display the following acknowledgment:
  22  *    "This product includes software developed by the OpenSSL Project
  23  *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
  24  *
  25  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  26  *    endorse or promote products derived from this software without
  27  *    prior written permission. For written permission, please contact
  28  *    licensing@OpenSSL.org.
  29  *
  30  * 5. Products derived from this software may not be called "OpenSSL"
  31  *    nor may "OpenSSL" appear in their names without prior written
  32  *    permission of the OpenSSL Project.
  33  *
  34  * 6. Redistributions of any form whatsoever must retain the following
  35  *    acknowledgment:
  36  *    "This product includes software developed by the OpenSSL Project
  37  *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
  38  *
  39  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  40  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  41  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  42  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  43  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  44  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  45  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  46  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  47  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  48  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  49  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  50  * OF THE POSSIBILITY OF SUCH DAMAGE.
  51  * ====================================================================
  52  *
  53  * This product includes cryptographic software written by Eric Young
  54  * (eay@cryptsoft.com).  This product includes software written by Tim
  55  * Hudson (tjh@cryptsoft.com).
  56  *
  57  */
  58
  59 #include <stdio.h>
  60 #include <openssl/crypto.h>
  61 #include "cryptlib.h"
  62 #include <openssl/dso.h>
  63 #include <openssl/engine.h>
  64
  65 #ifndef OPENSSL_NO_HW
  66 #ifndef OPENSSL_NO_HW_CSWIFT
  67
  68 /* Attribution notice: Rainbow have generously allowed me to reproduce
  69  * the necessary definitions here from their API. This means the support
  70  * can build independently of whether application builders have the
  71  * API or hardware. This will allow developers to easily produce software
  72  * that has latent hardware support for any users that have accelerators
  73  * installed, without the developers themselves needing anything extra.
  74  *
  75  * I have only clipped the parts from the CryptoSwift header files that
  76  * are (or seem) relevant to the CryptoSwift support code. This is
  77  * simply to keep the file sizes reasonable.
  78  * [Geoff]
  79  */
  80 #ifdef FLAT_INC
  81 #include "cswift.h"
  82 #else
  83 #include "vendor_defns/cswift.h"
  84 #endif
  85
  86 static int cswift_init(ENGINE *);
  87 static int cswift_finish(ENGINE *);
  88
  89 /* BIGNUM stuff */
  90 static int cswift_mod_exp(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
  91                 const BIGNUM *m, BN_CTX *ctx);
  92 static int cswift_mod_exp_crt(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
  93                 const BIGNUM *q, const BIGNUM *dmp1, const BIGNUM *dmq1,
  94                 const BIGNUM *iqmp, BN_CTX *ctx);
  95
  96 /* RSA stuff */
  97 static int cswift_rsa_mod_exp(BIGNUM *r0, const BIGNUM *I, RSA *rsa);
  98 /* This function is aliased to mod_exp (with the mont stuff dropped). */
  99 static int cswift_mod_exp_mont(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
 100                 const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx);
 101
 102 /* DSA stuff */
 103 static DSA_SIG *cswift_dsa_sign(const unsigned char *dgst, int dlen, DSA *dsa);
 104 static int cswift_dsa_verify(const unsigned char *dgst, int dgst_len,
 105                                 DSA_SIG *sig, DSA *dsa);
 106
 107 /* DH stuff */
 108 /* This function is alised to mod_exp (with the DH and mont dropped). */
 109 static int cswift_mod_exp_dh(const DH *dh, BIGNUM *r,
 110                 const BIGNUM *a, const BIGNUM *p,
 111                 const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx);
 112
 113
 114 /* Our internal RSA_METHOD that we provide pointers to */
 115 static RSA_METHOD cswift_rsa =
 116         {
 117         "CryptoSwift RSA method",
 118         NULL,
 119         NULL,
 120         NULL,
 121         NULL,
 122         cswift_rsa_mod_exp,
 123         cswift_mod_exp_mont,
 124         NULL,
 125         NULL,
 126         0,
 127         NULL,
 128         NULL,
 129         NULL
 130         };
 131
 132 /* Our internal DSA_METHOD that we provide pointers to */
 133 static DSA_METHOD cswift_dsa =
 134         {
 135         "CryptoSwift DSA method",
 136         cswift_dsa_sign,
 137         NULL, /* dsa_sign_setup */
 138         cswift_dsa_verify,
 139         NULL, /* dsa_mod_exp */
 140         NULL, /* bn_mod_exp */
 141         NULL, /* init */
 142         NULL, /* finish */
 143         0, /* flags */
 144         NULL /* app_data */
 145         };
 146
 147 /* Our internal DH_METHOD that we provide pointers to */
 148 static DH_METHOD cswift_dh =
 149         {
 150         "CryptoSwift DH method",
 151         NULL,
 152         NULL,
 153         cswift_mod_exp_dh,
 154         NULL,
 155         NULL,
 156         0,
 157         NULL
 158         };
 159
 160 /* Constants used when creating the ENGINE */
 161 static const char *engine_cswift_id = "cswift";
 162 static const char *engine_cswift_name = "CryptoSwift hardware engine support";
 163
 164 /* As this is only ever called once, there's no need for locking
 165  * (indeed - the lock will already be held by our caller!!!) */
 166 ENGINE *ENGINE_cswift()
 167         {
 168         const RSA_METHOD *meth1;
 169         const DH_METHOD *meth2;
 170         ENGINE *ret = ENGINE_new();
 171         if(!ret)
 172                 return NULL;
 173         if(!ENGINE_set_id(ret, engine_cswift_id) ||
 174                         !ENGINE_set_name(ret, engine_cswift_name) ||
 175                         !ENGINE_set_RSA(ret, &cswift_rsa) ||
 176                         !ENGINE_set_DSA(ret, &cswift_dsa) ||
 177                         !ENGINE_set_DH(ret, &cswift_dh) ||
 178                         !ENGINE_set_BN_mod_exp(ret, &cswift_mod_exp) ||
 179                         !ENGINE_set_BN_mod_exp_crt(ret, &cswift_mod_exp_crt) ||
 180                         !ENGINE_set_init_function(ret, cswift_init) ||
 181                         !ENGINE_set_finish_function(ret, cswift_finish))
 182                 {
 183                 ENGINE_free(ret);
 184                 return NULL;
 185                 }
 186
 187         /* We know that the "PKCS1_SSLeay()" functions hook properly
 188          * to the cswift-specific mod_exp and mod_exp_crt so we use
 189          * those functions. NB: We don't use ENGINE_openssl() or
 190          * anything "more generic" because something like the RSAref
 191          * code may not hook properly, and if you own one of these
 192          * cards then you have the right to do RSA operations on it
 193          * anyway! */
 194         meth1 = RSA_PKCS1_SSLeay();
 195         cswift_rsa.rsa_pub_enc = meth1->rsa_pub_enc;
 196         cswift_rsa.rsa_pub_dec = meth1->rsa_pub_dec;
 197         cswift_rsa.rsa_priv_enc = meth1->rsa_priv_enc;
 198         cswift_rsa.rsa_priv_dec = meth1->rsa_priv_dec;
 199
 200         /* Much the same for Diffie-Hellman */
 201         meth2 = DH_OpenSSL();
 202         cswift_dh.generate_key = meth2->generate_key;
 203         cswift_dh.compute_key = meth2->compute_key;
 204         return ret;
 205         }
 206
 207 /* This is a process-global DSO handle used for loading and unloading
 208  * the CryptoSwift library. NB: This is only set (or unset) during an
 209  * init() or finish() call (reference counts permitting) and they're
 210  * operating with global locks, so this should be thread-safe
 211  * implicitly. */
 212 static DSO *cswift_dso = NULL;
 213
 214 /* These are the function pointers that are (un)set when the library has
 215  * successfully (un)loaded. */
 216 t_swAcquireAccContext *p_CSwift_AcquireAccContext = NULL;
 217 t_swAttachKeyParam *p_CSwift_AttachKeyParam = NULL;
 218 t_swSimpleRequest *p_CSwift_SimpleRequest = NULL;
 219 t_swReleaseAccContext *p_CSwift_ReleaseAccContext = NULL;
 220
 221 /* Used in the DSO operations. */
 222 static const char *CSWIFT_LIBNAME = "swift";
 223 static const char *CSWIFT_F1 = "swAcquireAccContext";
 224 static const char *CSWIFT_F2 = "swAttachKeyParam";
 225 static const char *CSWIFT_F3 = "swSimpleRequest";
 226 static const char *CSWIFT_F4 = "swReleaseAccContext";
 227
 228
 229 /* CryptoSwift library functions and mechanics - these are used by the
 230  * higher-level functions further down. NB: As and where there's no
 231  * error checking, take a look lower down where these functions are
 232  * called, the checking and error handling is probably down there. */
 233
 234 /* utility function to obtain a context */
 235 static int get_context(SW_CONTEXT_HANDLE *hac)
 236         {
 237         SW_STATUS status;
 238
 239         status = p_CSwift_AcquireAccContext(hac);
 240         if(status != SW_OK)
 241                 return 0;
 242         return 1;
 243         }
 244
 245 /* similarly to release one. */
 246 static void release_context(SW_CONTEXT_HANDLE hac)
 247         {
 248         p_CSwift_ReleaseAccContext(hac);
 249         }
 250
 251 /* (de)initialisation functions. */
 252 static int cswift_init(ENGINE *e)
 253         {
 254         SW_CONTEXT_HANDLE hac;
 255         t_swAcquireAccContext *p1;
 256         t_swAttachKeyParam *p2;
 257         t_swSimpleRequest *p3;
 258         t_swReleaseAccContext *p4;
 259
 260         if(cswift_dso != NULL)
 261                 {
 262                 ENGINEerr(ENGINE_F_CSWIFT_INIT,ENGINE_R_ALREADY_LOADED);
 263                 goto err;
 264                 }
 265         /* Attempt to load libswift.so/swift.dll/whatever. */
 266         cswift_dso = DSO_load(NULL, CSWIFT_LIBNAME, NULL, 0);
 267         if(cswift_dso == NULL)
 268                 {
 269                 ENGINEerr(ENGINE_F_CSWIFT_INIT,ENGINE_R_DSO_FAILURE);
 270                 goto err;
 271                 }
 272         if(!(p1 = (t_swAcquireAccContext *)
 273                                 DSO_bind_func(cswift_dso, CSWIFT_F1)) ||
 274                         !(p2 = (t_swAttachKeyParam *)
 275                                 DSO_bind_func(cswift_dso, CSWIFT_F2)) ||
 276                         !(p3 = (t_swSimpleRequest *)
 277                                 DSO_bind_func(cswift_dso, CSWIFT_F3)) ||
 278                         !(p4 = (t_swReleaseAccContext *)
 279                                 DSO_bind_func(cswift_dso, CSWIFT_F4)))
 280                 {
 281                 ENGINEerr(ENGINE_F_CSWIFT_INIT,ENGINE_R_DSO_FAILURE);
 282                 goto err;
 283                 }
 284         /* Copy the pointers */
 285         p_CSwift_AcquireAccContext = p1;
 286         p_CSwift_AttachKeyParam = p2;
 287         p_CSwift_SimpleRequest = p3;
 288         p_CSwift_ReleaseAccContext = p4;
 289         /* Try and get a context - if not, we may have a DSO but no
 290          * accelerator! */
 291         if(!get_context(&hac))
 292                 {
 293                 ENGINEerr(ENGINE_F_CSWIFT_INIT,ENGINE_R_UNIT_FAILURE);
 294                 goto err;
 295                 }
 296         release_context(hac);
 297         /* Everything's fine. */
 298         return 1;
 299 err:
 300         if(cswift_dso)
 301                 DSO_free(cswift_dso);
 302         p_CSwift_AcquireAccContext = NULL;
 303         p_CSwift_AttachKeyParam = NULL;
 304         p_CSwift_SimpleRequest = NULL;
 305         p_CSwift_ReleaseAccContext = NULL;
 306         return 0;
 307         }
 308
 309 static int cswift_finish(ENGINE *e)
 310         {
 311         if(cswift_dso == NULL)
 312                 {
 313                 ENGINEerr(ENGINE_F_CSWIFT_FINISH,ENGINE_R_NOT_LOADED);
 314                 return 0;
 315                 }
 316         if(!DSO_free(cswift_dso))
 317                 {
 318                 ENGINEerr(ENGINE_F_CSWIFT_FINISH,ENGINE_R_DSO_FAILURE);
 319                 return 0;
 320                 }
 321         cswift_dso = NULL;
 322         p_CSwift_AcquireAccContext = NULL;
 323         p_CSwift_AttachKeyParam = NULL;
 324         p_CSwift_SimpleRequest = NULL;
 325         p_CSwift_ReleaseAccContext = NULL;
 326         return 1;
 327         }
 328
 329 /* Un petit mod_exp */
 330 static int cswift_mod_exp(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
 331                         const BIGNUM *m, BN_CTX *ctx)
 332         {
 333         /* I need somewhere to store temporary serialised values for
 334          * use with the CryptoSwift API calls. A neat cheat - I'll use
 335          * BIGNUMs from the BN_CTX but access their arrays directly as
 336          * byte arrays <grin>. This way I don't have to clean anything
 337          * up. */
 338         BIGNUM *modulus;
 339         BIGNUM *exponent;
 340         BIGNUM *argument;
 341         BIGNUM *result;
 342         SW_STATUS sw_status;
 343         SW_LARGENUMBER arg, res;
 344         SW_PARAM sw_param;
 345         SW_CONTEXT_HANDLE hac;
 346         int to_return, acquired;
 347
 348         modulus = exponent = argument = result = NULL;
 349         to_return = 0; /* expect failure */
 350         acquired = 0;
 351
 352         if(!get_context(&hac))
 353                 {
 354                 ENGINEerr(ENGINE_F_CSWIFT_MOD_EXP,ENGINE_R_GET_HANDLE_FAILED);
 355                 goto err;
 356                 }
 357         acquired = 1;
 358         /* Prepare the params */
 359         BN_CTX_start(ctx);
 360         modulus = BN_CTX_get(ctx);
 361         exponent = BN_CTX_get(ctx);
 362         argument = BN_CTX_get(ctx);
 363         result = BN_CTX_get(ctx);
 364         if(!result)
 365                 {
 366                 ENGINEerr(ENGINE_F_CSWIFT_MOD_EXP,ENGINE_R_BN_CTX_FULL);
 367                 goto err;
 368                 }
 369         if(!bn_wexpand(modulus, m->top) || !bn_wexpand(exponent, p->top) ||
 370                 !bn_wexpand(argument, a->top) || !bn_wexpand(result, m->top))
 371                 {
 372                 ENGINEerr(ENGINE_F_CSWIFT_MOD_EXP,ENGINE_R_BN_EXPAND_FAIL);
 373                 goto err;
 374                 }
 375         sw_param.type = SW_ALG_EXP;
 376         sw_param.up.exp.modulus.nbytes = BN_bn2bin(m,
 377                 (unsigned char *)modulus->d);
 378         sw_param.up.exp.modulus.value = (unsigned char *)modulus->d;
 379         sw_param.up.exp.exponent.nbytes = BN_bn2bin(p,
 380                 (unsigned char *)exponent->d);
 381         sw_param.up.exp.exponent.value = (unsigned char *)exponent->d;
 382         /* Attach the key params */
 383         sw_status = p_CSwift_AttachKeyParam(hac, &sw_param);
 384         switch(sw_status)
 385                 {
 386         case SW_OK:
 387                 break;
 388         case SW_ERR_INPUT_SIZE:
 389                 ENGINEerr(ENGINE_F_CSWIFT_MOD_EXP,
 390                         ENGINE_R_SIZE_TOO_LARGE_OR_TOO_SMALL);
 391                 goto err;
 392         default:
 393                 {
 394                 char tmpbuf[20];
 395                 ENGINEerr(ENGINE_F_CSWIFT_MOD_EXP,ENGINE_R_REQUEST_FAILED);
 396                 sprintf(tmpbuf, "%ld", sw_status);
 397                 ERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf);
 398                 }
 399                 goto err;
 400                 }
 401         /* Prepare the argument and response */
 402         arg.nbytes = BN_bn2bin(a, (unsigned char *)argument->d);
 403         arg.value = (unsigned char *)argument->d;
 404         res.nbytes = BN_num_bytes(m);
 405         memset(result->d, 0, res.nbytes);
 406         res.value = (unsigned char *)result->d;
 407         /* Perform the operation */
 408         if((sw_status = p_CSwift_SimpleRequest(hac, SW_CMD_MODEXP, &arg, 1,
 409                 &res, 1)) != SW_OK)
 410                 {
 411                 char tmpbuf[20];
 412                 ENGINEerr(ENGINE_F_CSWIFT_MOD_EXP,ENGINE_R_REQUEST_FAILED);
 413                 sprintf(tmpbuf, "%ld", sw_status);
 414                 ERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf);
 415                 goto err;
 416                 }
 417         /* Convert the response */
 418         BN_bin2bn((unsigned char *)result->d, res.nbytes, r);
 419         to_return = 1;
 420 err:
 421         if(acquired)
 422                 release_context(hac);
 423         BN_CTX_end(ctx);
 424         return to_return;
 425         }
 426
 427 /* Un petit mod_exp chinois */
 428 static int cswift_mod_exp_crt(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
 429                         const BIGNUM *q, const BIGNUM *dmp1,
 430                         const BIGNUM *dmq1, const BIGNUM *iqmp, BN_CTX *ctx)
 431         {
 432         SW_STATUS sw_status;
 433         SW_LARGENUMBER arg, res;
 434         SW_PARAM sw_param;
 435         SW_CONTEXT_HANDLE hac;
 436         BIGNUM *rsa_p = NULL;
 437         BIGNUM *rsa_q = NULL;
 438         BIGNUM *rsa_dmp1 = NULL;
 439         BIGNUM *rsa_dmq1 = NULL;
 440         BIGNUM *rsa_iqmp = NULL;
 441         BIGNUM *argument = NULL;
 442         BIGNUM *result = NULL;
 443         int to_return = 0; /* expect failure */
 444         int acquired = 0;
 445
 446         if(!get_context(&hac))
 447                 {
 448                 ENGINEerr(ENGINE_F_CSWIFT_MOD_EXP_CRT,ENGINE_R_GET_HANDLE_FAILED);
 449                 goto err;
 450                 }
 451         acquired = 1;
 452         /* Prepare the params */
 453         BN_CTX_start(ctx);
 454         rsa_p = BN_CTX_get(ctx);
 455         rsa_q = BN_CTX_get(ctx);
 456         rsa_dmp1 = BN_CTX_get(ctx);
 457         rsa_dmq1 = BN_CTX_get(ctx);
 458         rsa_iqmp = BN_CTX_get(ctx);
 459         argument = BN_CTX_get(ctx);
 460         result = BN_CTX_get(ctx);
 461         if(!result)
 462                 {
 463                 ENGINEerr(ENGINE_F_CSWIFT_MOD_EXP_CRT,ENGINE_R_BN_CTX_FULL);
 464                 goto err;
 465                 }
 466         if(!bn_wexpand(rsa_p, p->top) || !bn_wexpand(rsa_q, q->top) ||
 467                         !bn_wexpand(rsa_dmp1, dmp1->top) ||
 468                         !bn_wexpand(rsa_dmq1, dmq1->top) ||
 469                         !bn_wexpand(rsa_iqmp, iqmp->top) ||
 470                         !bn_wexpand(argument, a->top) ||
 471                         !bn_wexpand(result, p->top + q->top))
 472                 {
 473                 ENGINEerr(ENGINE_F_CSWIFT_MOD_EXP_CRT,ENGINE_R_BN_EXPAND_FAIL);
 474                 goto err;
 475                 }
 476         sw_param.type = SW_ALG_CRT;
 477         sw_param.up.crt.p.nbytes = BN_bn2bin(p, (unsigned char *)rsa_p->d);
 478         sw_param.up.crt.p.value = (unsigned char *)rsa_p->d;
 479         sw_param.up.crt.q.nbytes = BN_bn2bin(q, (unsigned char *)rsa_q->d);
 480         sw_param.up.crt.q.value = (unsigned char *)rsa_q->d;
 481         sw_param.up.crt.dmp1.nbytes = BN_bn2bin(dmp1,
 482                 (unsigned char *)rsa_dmp1->d);
 483         sw_param.up.crt.dmp1.value = (unsigned char *)rsa_dmp1->d;
 484         sw_param.up.crt.dmq1.nbytes = BN_bn2bin(dmq1,
 485                 (unsigned char *)rsa_dmq1->d);
 486         sw_param.up.crt.dmq1.value = (unsigned char *)rsa_dmq1->d;
 487         sw_param.up.crt.iqmp.nbytes = BN_bn2bin(iqmp,
 488                 (unsigned char *)rsa_iqmp->d);
 489         sw_param.up.crt.iqmp.value = (unsigned char *)rsa_iqmp->d;
 490         /* Attach the key params */
 491         sw_status = p_CSwift_AttachKeyParam(hac, &sw_param);
 492         switch(sw_status)
 493                 {
 494         case SW_OK:
 495                 break;
 496         case SW_ERR_INPUT_SIZE:
 497                 ENGINEerr(ENGINE_F_CSWIFT_MOD_EXP_CRT,
 498                         ENGINE_R_SIZE_TOO_LARGE_OR_TOO_SMALL);
 499                 goto err;
 500         default:
 501                 {
 502                 char tmpbuf[20];
 503                 ENGINEerr(ENGINE_F_CSWIFT_MOD_EXP_CRT,ENGINE_R_REQUEST_FAILED);
 504                 sprintf(tmpbuf, "%ld", sw_status);
 505                 ERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf);
 506                 }
 507                 goto err;
 508                 }
 509         /* Prepare the argument and response */
 510         arg.nbytes = BN_bn2bin(a, (unsigned char *)argument->d);
 511         arg.value = (unsigned char *)argument->d;
 512         res.nbytes = 2 * BN_num_bytes(p);
 513         memset(result->d, 0, res.nbytes);
 514         res.value = (unsigned char *)result->d;
 515         /* Perform the operation */
 516         if((sw_status = p_CSwift_SimpleRequest(hac, SW_CMD_MODEXP_CRT, &arg, 1,
 517                 &res, 1)) != SW_OK)
 518                 {
 519                 char tmpbuf[20];
 520                 ENGINEerr(ENGINE_F_CSWIFT_MOD_EXP_CRT,ENGINE_R_REQUEST_FAILED);
 521                 sprintf(tmpbuf, "%ld", sw_status);
 522                 ERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf);
 523                 goto err;
 524                 }
 525         /* Convert the response */
 526         BN_bin2bn((unsigned char *)result->d, res.nbytes, r);
 527         to_return = 1;
 528 err:
 529         if(acquired)
 530                 release_context(hac);
 531         BN_CTX_end(ctx);
 532         return to_return;
 533         }
 534
 535 static int cswift_rsa_mod_exp(BIGNUM *r0, const BIGNUM *I, RSA *rsa)
 536         {
 537         BN_CTX *ctx;
 538         int to_return = 0;
 539
 540         if((ctx = BN_CTX_new()) == NULL)
 541                 goto err;
 542         if(!rsa->p || !rsa->q || !rsa->dmp1 || !rsa->dmq1 || !rsa->iqmp)
 543                 {
 544                 ENGINEerr(ENGINE_F_CSWIFT_RSA_MOD_EXP,ENGINE_R_MISSING_KEY_COMPONENTS);
 545                 goto err;
 546                 }
 547         to_return = cswift_mod_exp_crt(r0, I, rsa->p, rsa->q, rsa->dmp1,
 548                 rsa->dmq1, rsa->iqmp, ctx);
 549 err:
 550         if(ctx)
 551                 BN_CTX_free(ctx);
 552         return to_return;
 553         }
 554
 555 /* This function is aliased to mod_exp (with the mont stuff dropped). */
 556 static int cswift_mod_exp_mont(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
 557                 const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx)
 558         {
 559         return cswift_mod_exp(r, a, p, m, ctx);
 560         }
 561
 562 static DSA_SIG *cswift_dsa_sign(const unsigned char *dgst, int dlen, DSA *dsa)
 563         {
 564         SW_CONTEXT_HANDLE hac;
 565         SW_PARAM sw_param;
 566         SW_STATUS sw_status;
 567         SW_LARGENUMBER arg, res;
 568         unsigned char *ptr;
 569         BN_CTX *ctx;
 570         BIGNUM *dsa_p = NULL;
 571         BIGNUM *dsa_q = NULL;
 572         BIGNUM *dsa_g = NULL;
 573         BIGNUM *dsa_key = NULL;
 574         BIGNUM *result = NULL;
 575         DSA_SIG *to_return = NULL;
 576         int acquired = 0;
 577
 578         if((ctx = BN_CTX_new()) == NULL)
 579                 goto err;
 580         if(!get_context(&hac))
 581                 {
 582                 ENGINEerr(ENGINE_F_CSWIFT_DSA_SIGN,ENGINE_R_GET_HANDLE_FAILED);
 583                 goto err;
 584                 }
 585         acquired = 1;
 586         /* Prepare the params */
 587         BN_CTX_start(ctx);
 588         dsa_p = BN_CTX_get(ctx);
 589         dsa_q = BN_CTX_get(ctx);
 590         dsa_g = BN_CTX_get(ctx);
 591         dsa_key = BN_CTX_get(ctx);
 592         result = BN_CTX_get(ctx);
 593         if(!result)
 594                 {
 595                 ENGINEerr(ENGINE_F_CSWIFT_DSA_SIGN,ENGINE_R_BN_CTX_FULL);
 596                 goto err;
 597                 }
 598         if(!bn_wexpand(dsa_p, dsa->p->top) ||
 599                         !bn_wexpand(dsa_q, dsa->q->top) ||
 600                         !bn_wexpand(dsa_g, dsa->g->top) ||
 601                         !bn_wexpand(dsa_key, dsa->priv_key->top) ||
 602                         !bn_wexpand(result, dsa->p->top))
 603                 {
 604                 ENGINEerr(ENGINE_F_CSWIFT_DSA_SIGN,ENGINE_R_BN_EXPAND_FAIL);
 605                 goto err;
 606                 }
 607         sw_param.type = SW_ALG_DSA;
 608         sw_param.up.dsa.p.nbytes = BN_bn2bin(dsa->p,
 609                                 (unsigned char *)dsa_p->d);
 610         sw_param.up.dsa.p.value = (unsigned char *)dsa_p->d;
 611         sw_param.up.dsa.q.nbytes = BN_bn2bin(dsa->q,
 612                                 (unsigned char *)dsa_q->d);
 613         sw_param.up.dsa.q.value = (unsigned char *)dsa_q->d;
 614         sw_param.up.dsa.g.nbytes = BN_bn2bin(dsa->g,
 615                                 (unsigned char *)dsa_g->d);
 616         sw_param.up.dsa.g.value = (unsigned char *)dsa_g->d;
 617         sw_param.up.dsa.key.nbytes = BN_bn2bin(dsa->priv_key,
 618                                 (unsigned char *)dsa_key->d);
 619         sw_param.up.dsa.key.value = (unsigned char *)dsa_key->d;
 620         /* Attach the key params */
 621         sw_status = p_CSwift_AttachKeyParam(hac, &sw_param);
 622         switch(sw_status)
 623                 {
 624         case SW_OK:
 625                 break;
 626         case SW_ERR_INPUT_SIZE:
 627                 ENGINEerr(ENGINE_F_CSWIFT_DSA_SIGN,
 628                         ENGINE_R_SIZE_TOO_LARGE_OR_TOO_SMALL);
 629                 goto err;
 630         default:
 631                 {
 632                 char tmpbuf[20];
 633                 ENGINEerr(ENGINE_F_CSWIFT_DSA_SIGN,ENGINE_R_REQUEST_FAILED);
 634                 sprintf(tmpbuf, "%ld", sw_status);
 635                 ERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf);
 636                 }
 637                 goto err;
 638                 }
 639         /* Prepare the argument and response */
 640         arg.nbytes = dlen;
 641         arg.value = (unsigned char *)dgst;
 642         res.nbytes = BN_num_bytes(dsa->p);
 643         memset(result->d, 0, res.nbytes);
 644         res.value = (unsigned char *)result->d;
 645         /* Perform the operation */
 646         sw_status = p_CSwift_SimpleRequest(hac, SW_CMD_DSS_SIGN, &arg, 1,
 647                 &res, 1);
 648         if(sw_status != SW_OK)
 649                 {
 650                 char tmpbuf[20];
 651                 ENGINEerr(ENGINE_F_CSWIFT_DSA_SIGN,ENGINE_R_REQUEST_FAILED);
 652                 sprintf(tmpbuf, "%ld", sw_status);
 653                 ERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf);
 654                 goto err;
 655                 }
 656         /* Convert the response */
 657         ptr = (unsigned char *)result->d;
 658         if((to_return = DSA_SIG_new()) == NULL)
 659                 goto err;
 660         to_return->r = BN_bin2bn((unsigned char *)result->d, 20, NULL);
 661         to_return->s = BN_bin2bn((unsigned char *)result->d + 20, 20, NULL);
 662
 663 err:
 664         if(acquired)
 665                 release_context(hac);
 666         if(ctx)
 667                 {
 668                 BN_CTX_end(ctx);
 669                 BN_CTX_free(ctx);
 670                 }
 671         return to_return;
 672         }
 673
 674 static int cswift_dsa_verify(const unsigned char *dgst, int dgst_len,
 675                                 DSA_SIG *sig, DSA *dsa)
 676         {
 677         SW_CONTEXT_HANDLE hac;
 678         SW_PARAM sw_param;
 679         SW_STATUS sw_status;
 680         SW_LARGENUMBER arg[2], res;
 681         unsigned long sig_result;
 682         BN_CTX *ctx;
 683         BIGNUM *dsa_p = NULL;
 684         BIGNUM *dsa_q = NULL;
 685         BIGNUM *dsa_g = NULL;
 686         BIGNUM *dsa_key = NULL;
 687         BIGNUM *argument = NULL;
 688         int to_return = -1;
 689         int acquired = 0;
 690
 691         if((ctx = BN_CTX_new()) == NULL)
 692                 goto err;
 693         if(!get_context(&hac))
 694                 {
 695                 ENGINEerr(ENGINE_F_CSWIFT_DSA_VERIFY,ENGINE_R_GET_HANDLE_FAILED);
 696                 goto err;
 697                 }
 698         acquired = 1;
 699         /* Prepare the params */
 700         BN_CTX_start(ctx);
 701         dsa_p = BN_CTX_get(ctx);
 702         dsa_q = BN_CTX_get(ctx);
 703         dsa_g = BN_CTX_get(ctx);
 704         dsa_key = BN_CTX_get(ctx);
 705         argument = BN_CTX_get(ctx);
 706         if(!argument)
 707                 {
 708                 ENGINEerr(ENGINE_F_CSWIFT_DSA_VERIFY,ENGINE_R_BN_CTX_FULL);
 709                 goto err;
 710                 }
 711         if(!bn_wexpand(dsa_p, dsa->p->top) ||
 712                         !bn_wexpand(dsa_q, dsa->q->top) ||
 713                         !bn_wexpand(dsa_g, dsa->g->top) ||
 714                         !bn_wexpand(dsa_key, dsa->pub_key->top) ||
 715                         !bn_wexpand(argument, 40))
 716                 {
 717                 ENGINEerr(ENGINE_F_CSWIFT_DSA_VERIFY,ENGINE_R_BN_EXPAND_FAIL);
 718                 goto err;
 719                 }
 720         sw_param.type = SW_ALG_DSA;
 721         sw_param.up.dsa.p.nbytes = BN_bn2bin(dsa->p,
 722                                 (unsigned char *)dsa_p->d);
 723         sw_param.up.dsa.p.value = (unsigned char *)dsa_p->d;
 724         sw_param.up.dsa.q.nbytes = BN_bn2bin(dsa->q,
 725                                 (unsigned char *)dsa_q->d);
 726         sw_param.up.dsa.q.value = (unsigned char *)dsa_q->d;
 727         sw_param.up.dsa.g.nbytes = BN_bn2bin(dsa->g,
 728                                 (unsigned char *)dsa_g->d);
 729         sw_param.up.dsa.g.value = (unsigned char *)dsa_g->d;
 730         sw_param.up.dsa.key.nbytes = BN_bn2bin(dsa->pub_key,
 731                                 (unsigned char *)dsa_key->d);
 732         sw_param.up.dsa.key.value = (unsigned char *)dsa_key->d;
 733         /* Attach the key params */
 734         sw_status = p_CSwift_AttachKeyParam(hac, &sw_param);
 735         switch(sw_status)
 736                 {
 737         case SW_OK:
 738                 break;
 739         case SW_ERR_INPUT_SIZE:
 740                 ENGINEerr(ENGINE_F_CSWIFT_DSA_VERIFY,
 741                         ENGINE_R_SIZE_TOO_LARGE_OR_TOO_SMALL);
 742                 goto err;
 743         default:
 744                 {
 745                 char tmpbuf[20];
 746                 ENGINEerr(ENGINE_F_CSWIFT_DSA_VERIFY,ENGINE_R_REQUEST_FAILED);
 747                 sprintf(tmpbuf, "%ld", sw_status);
 748                 ERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf);
 749                 }
 750                 goto err;
 751                 }
 752         /* Prepare the argument and response */
 753         arg[0].nbytes = dgst_len;
 754         arg[0].value = (unsigned char *)dgst;
 755         arg[1].nbytes = 40;
 756         arg[1].value = (unsigned char *)argument->d;
 757         memset(arg[1].value, 0, 40);
 758         BN_bn2bin(sig->r, arg[1].value + 20 - BN_num_bytes(sig->r));
 759         BN_bn2bin(sig->s, arg[1].value + 40 - BN_num_bytes(sig->s));
 760         res.nbytes = 4; /* unsigned long */
 761         res.value = (unsigned char *)(&sig_result);
 762         /* Perform the operation */
 763         sw_status = p_CSwift_SimpleRequest(hac, SW_CMD_DSS_VERIFY, arg, 2,
 764                 &res, 1);
 765         if(sw_status != SW_OK)
 766                 {
 767                 char tmpbuf[20];
 768                 ENGINEerr(ENGINE_F_CSWIFT_DSA_VERIFY,ENGINE_R_REQUEST_FAILED);
 769                 sprintf(tmpbuf, "%ld", sw_status);
 770                 ERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf);
 771                 goto err;
 772                 }
 773         /* Convert the response */
 774         to_return = ((sig_result == 0) ? 0 : 1);
 775
 776 err:
 777         if(acquired)
 778                 release_context(hac);
 779         if(ctx)
 780                 {
 781                 BN_CTX_end(ctx);
 782                 BN_CTX_free(ctx);
 783                 }
 784         return to_return;
 785         }
 786
 787 /* This function is aliased to mod_exp (with the dh and mont dropped). */
 788 static int cswift_mod_exp_dh(const DH *dh, BIGNUM *r,
 789                 const BIGNUM *a, const BIGNUM *p,
 790                 const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx)
 791         {
 792         return cswift_mod_exp(r, a, p, m, ctx);
 793         }
 794
 795 #endif /* !OPENSSL_NO_HW_CSWIFT */
 796 #endif /* !OPENSSL_NO_HW */