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 *e);
  87 static int cswift_finish(ENGINE *e);
  88 static int cswift_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f)());
  89
  90 /* BIGNUM stuff */
  91 static int cswift_mod_exp(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
  92                 const BIGNUM *m, BN_CTX *ctx);
  93 static int cswift_mod_exp_crt(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
  94                 const BIGNUM *q, const BIGNUM *dmp1, const BIGNUM *dmq1,
  95                 const BIGNUM *iqmp, BN_CTX *ctx);
  96
  97 /* RSA stuff */
  98 static int cswift_rsa_mod_exp(BIGNUM *r0, const BIGNUM *I, RSA *rsa);
  99 /* This function is aliased to mod_exp (with the mont stuff dropped). */
 100 static int cswift_mod_exp_mont(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
 101                 const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx);
 102
 103 /* DSA stuff */
 104 static DSA_SIG *cswift_dsa_sign(const unsigned char *dgst, int dlen, DSA *dsa);
 105 static int cswift_dsa_verify(const unsigned char *dgst, int dgst_len,
 106                                 DSA_SIG *sig, DSA *dsa);
 107
 108 /* DH stuff */
 109 /* This function is alised to mod_exp (with the DH and mont dropped). */
 110 static int cswift_mod_exp_dh(const DH *dh, BIGNUM *r,
 111                 const BIGNUM *a, const BIGNUM *p,
 112                 const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx);
 113
 114 /* The definitions for control commands specific to this engine */
 115 #define CSWIFT_CMD_SO_PATH              ENGINE_CMD_BASE
 116 static const ENGINE_CMD_DEFN cswift_cmd_defns[] = {
 117         {CSWIFT_CMD_SO_PATH,
 118                 "SO_PATH",
 119                 "Specifies the path to the 'cswift' shared library",
 120                 ENGINE_CMD_FLAG_STRING},
 121         {0, NULL, NULL, 0}
 122         };
 123
 124 /* Our internal RSA_METHOD that we provide pointers to */
 125 static RSA_METHOD cswift_rsa =
 126         {
 127         "CryptoSwift RSA method",
 128         NULL,
 129         NULL,
 130         NULL,
 131         NULL,
 132         cswift_rsa_mod_exp,
 133         cswift_mod_exp_mont,
 134         NULL,
 135         NULL,
 136         0,
 137         NULL,
 138         NULL,
 139         NULL
 140         };
 141
 142 /* Our internal DSA_METHOD that we provide pointers to */
 143 static DSA_METHOD cswift_dsa =
 144         {
 145         "CryptoSwift DSA method",
 146         cswift_dsa_sign,
 147         NULL, /* dsa_sign_setup */
 148         cswift_dsa_verify,
 149         NULL, /* dsa_mod_exp */
 150         NULL, /* bn_mod_exp */
 151         NULL, /* init */
 152         NULL, /* finish */
 153         0, /* flags */
 154         NULL /* app_data */
 155         };
 156
 157 /* Our internal DH_METHOD that we provide pointers to */
 158 static DH_METHOD cswift_dh =
 159         {
 160         "CryptoSwift DH method",
 161         NULL,
 162         NULL,
 163         cswift_mod_exp_dh,
 164         NULL,
 165         NULL,
 166         0,
 167         NULL
 168         };
 169
 170 /* Constants used when creating the ENGINE */
 171 static const char *engine_cswift_id = "cswift";
 172 static const char *engine_cswift_name = "CryptoSwift hardware engine support";
 173
 174 /* As this is only ever called once, there's no need for locking
 175  * (indeed - the lock will already be held by our caller!!!) */
 176 ENGINE *ENGINE_cswift()
 177         {
 178         const RSA_METHOD *meth1;
 179         const DH_METHOD *meth2;
 180         ENGINE *ret = ENGINE_new();
 181         if(!ret)
 182                 return NULL;
 183         if(!ENGINE_set_id(ret, engine_cswift_id) ||
 184                         !ENGINE_set_name(ret, engine_cswift_name) ||
 185                         !ENGINE_set_RSA(ret, &cswift_rsa) ||
 186                         !ENGINE_set_DSA(ret, &cswift_dsa) ||
 187                         !ENGINE_set_DH(ret, &cswift_dh) ||
 188                         !ENGINE_set_BN_mod_exp(ret, &cswift_mod_exp) ||
 189                         !ENGINE_set_BN_mod_exp_crt(ret, &cswift_mod_exp_crt) ||
 190                         !ENGINE_set_init_function(ret, cswift_init) ||
 191                         !ENGINE_set_finish_function(ret, cswift_finish) ||
 192                         !ENGINE_set_ctrl_function(ret, cswift_ctrl) ||
 193                         !ENGINE_set_cmd_defns(ret, cswift_cmd_defns))
 194                 {
 195                 ENGINE_free(ret);
 196                 return NULL;
 197                 }
 198
 199         /* We know that the "PKCS1_SSLeay()" functions hook properly
 200          * to the cswift-specific mod_exp and mod_exp_crt so we use
 201          * those functions. NB: We don't use ENGINE_openssl() or
 202          * anything "more generic" because something like the RSAref
 203          * code may not hook properly, and if you own one of these
 204          * cards then you have the right to do RSA operations on it
 205          * anyway! */
 206         meth1 = RSA_PKCS1_SSLeay();
 207         cswift_rsa.rsa_pub_enc = meth1->rsa_pub_enc;
 208         cswift_rsa.rsa_pub_dec = meth1->rsa_pub_dec;
 209         cswift_rsa.rsa_priv_enc = meth1->rsa_priv_enc;
 210         cswift_rsa.rsa_priv_dec = meth1->rsa_priv_dec;
 211
 212         /* Much the same for Diffie-Hellman */
 213         meth2 = DH_OpenSSL();
 214         cswift_dh.generate_key = meth2->generate_key;
 215         cswift_dh.compute_key = meth2->compute_key;
 216         return ret;
 217         }
 218
 219 /* This is a process-global DSO handle used for loading and unloading
 220  * the CryptoSwift library. NB: This is only set (or unset) during an
 221  * init() or finish() call (reference counts permitting) and they're
 222  * operating with global locks, so this should be thread-safe
 223  * implicitly. */
 224 static DSO *cswift_dso = NULL;
 225
 226 /* These are the function pointers that are (un)set when the library has
 227  * successfully (un)loaded. */
 228 t_swAcquireAccContext *p_CSwift_AcquireAccContext = NULL;
 229 t_swAttachKeyParam *p_CSwift_AttachKeyParam = NULL;
 230 t_swSimpleRequest *p_CSwift_SimpleRequest = NULL;
 231 t_swReleaseAccContext *p_CSwift_ReleaseAccContext = NULL;
 232
 233 /* Used in the DSO operations. */
 234 static const char def_CSWIFT_LIBNAME[] = "swift";
 235 static const char *CSWIFT_LIBNAME = def_CSWIFT_LIBNAME;
 236 static const char *CSWIFT_F1 = "swAcquireAccContext";
 237 static const char *CSWIFT_F2 = "swAttachKeyParam";
 238 static const char *CSWIFT_F3 = "swSimpleRequest";
 239 static const char *CSWIFT_F4 = "swReleaseAccContext";
 240
 241
 242 /* CryptoSwift library functions and mechanics - these are used by the
 243  * higher-level functions further down. NB: As and where there's no
 244  * error checking, take a look lower down where these functions are
 245  * called, the checking and error handling is probably down there. */
 246
 247 /* utility function to obtain a context */
 248 static int get_context(SW_CONTEXT_HANDLE *hac)
 249         {
 250         SW_STATUS status;
 251
 252         status = p_CSwift_AcquireAccContext(hac);
 253         if(status != SW_OK)
 254                 return 0;
 255         return 1;
 256         }
 257
 258 /* similarly to release one. */
 259 static void release_context(SW_CONTEXT_HANDLE hac)
 260         {
 261         p_CSwift_ReleaseAccContext(hac);
 262         }
 263
 264 /* (de)initialisation functions. */
 265 static int cswift_init(ENGINE *e)
 266         {
 267         SW_CONTEXT_HANDLE hac;
 268         t_swAcquireAccContext *p1;
 269         t_swAttachKeyParam *p2;
 270         t_swSimpleRequest *p3;
 271         t_swReleaseAccContext *p4;
 272
 273         if(cswift_dso != NULL)
 274                 {
 275                 ENGINEerr(ENGINE_F_CSWIFT_INIT,ENGINE_R_ALREADY_LOADED);
 276                 goto err;
 277                 }
 278         /* Attempt to load libswift.so/swift.dll/whatever. */
 279         cswift_dso = DSO_load(NULL, CSWIFT_LIBNAME, NULL, 0);
 280         if(cswift_dso == NULL)
 281                 {
 282                 ENGINEerr(ENGINE_F_CSWIFT_INIT,ENGINE_R_DSO_FAILURE);
 283                 goto err;
 284                 }
 285         if(!(p1 = (t_swAcquireAccContext *)
 286                                 DSO_bind_func(cswift_dso, CSWIFT_F1)) ||
 287                         !(p2 = (t_swAttachKeyParam *)
 288                                 DSO_bind_func(cswift_dso, CSWIFT_F2)) ||
 289                         !(p3 = (t_swSimpleRequest *)
 290                                 DSO_bind_func(cswift_dso, CSWIFT_F3)) ||
 291                         !(p4 = (t_swReleaseAccContext *)
 292                                 DSO_bind_func(cswift_dso, CSWIFT_F4)))
 293                 {
 294                 ENGINEerr(ENGINE_F_CSWIFT_INIT,ENGINE_R_DSO_FAILURE);
 295                 goto err;
 296                 }
 297         /* Copy the pointers */
 298         p_CSwift_AcquireAccContext = p1;
 299         p_CSwift_AttachKeyParam = p2;
 300         p_CSwift_SimpleRequest = p3;
 301         p_CSwift_ReleaseAccContext = p4;
 302         /* Try and get a context - if not, we may have a DSO but no
 303          * accelerator! */
 304         if(!get_context(&hac))
 305                 {
 306                 ENGINEerr(ENGINE_F_CSWIFT_INIT,ENGINE_R_UNIT_FAILURE);
 307                 goto err;
 308                 }
 309         release_context(hac);
 310         /* Everything's fine. */
 311         return 1;
 312 err:
 313         if(cswift_dso)
 314                 DSO_free(cswift_dso);
 315         p_CSwift_AcquireAccContext = NULL;
 316         p_CSwift_AttachKeyParam = NULL;
 317         p_CSwift_SimpleRequest = NULL;
 318         p_CSwift_ReleaseAccContext = NULL;
 319         return 0;
 320         }
 321
 322 static int cswift_finish(ENGINE *e)
 323         {
 324         if(cswift_dso == NULL)
 325                 {
 326                 ENGINEerr(ENGINE_F_CSWIFT_FINISH,ENGINE_R_NOT_LOADED);
 327                 return 0;
 328                 }
 329         if(!DSO_free(cswift_dso))
 330                 {
 331                 ENGINEerr(ENGINE_F_CSWIFT_FINISH,ENGINE_R_DSO_FAILURE);
 332                 return 0;
 333                 }
 334         cswift_dso = NULL;
 335         p_CSwift_AcquireAccContext = NULL;
 336         p_CSwift_AttachKeyParam = NULL;
 337         p_CSwift_SimpleRequest = NULL;
 338         p_CSwift_ReleaseAccContext = NULL;
 339         return 1;
 340         }
 341
 342 static int cswift_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f)())
 343         {
 344         int initialised = ((cswift_dso == NULL) ? 0 : 1);
 345         switch(cmd)
 346                 {
 347         case CSWIFT_CMD_SO_PATH:
 348                 if(p == NULL)
 349                         {
 350                         ENGINEerr(ENGINE_F_CSWIFT_CTRL,
 351                                 ERR_R_PASSED_NULL_PARAMETER);
 352                         return 0;
 353                         }
 354                 if(initialised)
 355                         {
 356                         ENGINEerr(ENGINE_F_CSWIFT_CTRL,
 357                                 ENGINE_R_ALREADY_LOADED);
 358                         return 0;
 359                         }
 360                 CSWIFT_LIBNAME = (const char *)p;
 361                 return 1;
 362         default:
 363                 break;
 364                 }
 365         ENGINEerr(ENGINE_F_CSWIFT_CTRL,ENGINE_R_CTRL_COMMAND_NOT_IMPLEMENTED);
 366         return 0;
 367         }
 368
 369 /* Un petit mod_exp */
 370 static int cswift_mod_exp(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
 371                         const BIGNUM *m, BN_CTX *ctx)
 372         {
 373         /* I need somewhere to store temporary serialised values for
 374          * use with the CryptoSwift API calls. A neat cheat - I'll use
 375          * BIGNUMs from the BN_CTX but access their arrays directly as
 376          * byte arrays <grin>. This way I don't have to clean anything
 377          * up. */
 378         BIGNUM *modulus;
 379         BIGNUM *exponent;
 380         BIGNUM *argument;
 381         BIGNUM *result;
 382         SW_STATUS sw_status;
 383         SW_LARGENUMBER arg, res;
 384         SW_PARAM sw_param;
 385         SW_CONTEXT_HANDLE hac;
 386         int to_return, acquired;
 387
 388         modulus = exponent = argument = result = NULL;
 389         to_return = 0; /* expect failure */
 390         acquired = 0;
 391
 392         if(!get_context(&hac))
 393                 {
 394                 ENGINEerr(ENGINE_F_CSWIFT_MOD_EXP,ENGINE_R_GET_HANDLE_FAILED);
 395                 goto err;
 396                 }
 397         acquired = 1;
 398         /* Prepare the params */
 399         BN_CTX_start(ctx);
 400         modulus = BN_CTX_get(ctx);
 401         exponent = BN_CTX_get(ctx);
 402         argument = BN_CTX_get(ctx);
 403         result = BN_CTX_get(ctx);
 404         if(!result)
 405                 {
 406                 ENGINEerr(ENGINE_F_CSWIFT_MOD_EXP,ENGINE_R_BN_CTX_FULL);
 407                 goto err;
 408                 }
 409         if(!bn_wexpand(modulus, m->top) || !bn_wexpand(exponent, p->top) ||
 410                 !bn_wexpand(argument, a->top) || !bn_wexpand(result, m->top))
 411                 {
 412                 ENGINEerr(ENGINE_F_CSWIFT_MOD_EXP,ENGINE_R_BN_EXPAND_FAIL);
 413                 goto err;
 414                 }
 415         sw_param.type = SW_ALG_EXP;
 416         sw_param.up.exp.modulus.nbytes = BN_bn2bin(m,
 417                 (unsigned char *)modulus->d);
 418         sw_param.up.exp.modulus.value = (unsigned char *)modulus->d;
 419         sw_param.up.exp.exponent.nbytes = BN_bn2bin(p,
 420                 (unsigned char *)exponent->d);
 421         sw_param.up.exp.exponent.value = (unsigned char *)exponent->d;
 422         /* Attach the key params */
 423         sw_status = p_CSwift_AttachKeyParam(hac, &sw_param);
 424         switch(sw_status)
 425                 {
 426         case SW_OK:
 427                 break;
 428         case SW_ERR_INPUT_SIZE:
 429                 ENGINEerr(ENGINE_F_CSWIFT_MOD_EXP,
 430                         ENGINE_R_SIZE_TOO_LARGE_OR_TOO_SMALL);
 431                 goto err;
 432         default:
 433                 {
 434                 char tmpbuf[20];
 435                 ENGINEerr(ENGINE_F_CSWIFT_MOD_EXP,ENGINE_R_REQUEST_FAILED);
 436                 sprintf(tmpbuf, "%ld", sw_status);
 437                 ERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf);
 438                 }
 439                 goto err;
 440                 }
 441         /* Prepare the argument and response */
 442         arg.nbytes = BN_bn2bin(a, (unsigned char *)argument->d);
 443         arg.value = (unsigned char *)argument->d;
 444         res.nbytes = BN_num_bytes(m);
 445         memset(result->d, 0, res.nbytes);
 446         res.value = (unsigned char *)result->d;
 447         /* Perform the operation */
 448         if((sw_status = p_CSwift_SimpleRequest(hac, SW_CMD_MODEXP, &arg, 1,
 449                 &res, 1)) != SW_OK)
 450                 {
 451                 char tmpbuf[20];
 452                 ENGINEerr(ENGINE_F_CSWIFT_MOD_EXP,ENGINE_R_REQUEST_FAILED);
 453                 sprintf(tmpbuf, "%ld", sw_status);
 454                 ERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf);
 455                 goto err;
 456                 }
 457         /* Convert the response */
 458         BN_bin2bn((unsigned char *)result->d, res.nbytes, r);
 459         to_return = 1;
 460 err:
 461         if(acquired)
 462                 release_context(hac);
 463         BN_CTX_end(ctx);
 464         return to_return;
 465         }
 466
 467 /* Un petit mod_exp chinois */
 468 static int cswift_mod_exp_crt(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
 469                         const BIGNUM *q, const BIGNUM *dmp1,
 470                         const BIGNUM *dmq1, const BIGNUM *iqmp, BN_CTX *ctx)
 471         {
 472         SW_STATUS sw_status;
 473         SW_LARGENUMBER arg, res;
 474         SW_PARAM sw_param;
 475         SW_CONTEXT_HANDLE hac;
 476         BIGNUM *rsa_p = NULL;
 477         BIGNUM *rsa_q = NULL;
 478         BIGNUM *rsa_dmp1 = NULL;
 479         BIGNUM *rsa_dmq1 = NULL;
 480         BIGNUM *rsa_iqmp = NULL;
 481         BIGNUM *argument = NULL;
 482         BIGNUM *result = NULL;
 483         int to_return = 0; /* expect failure */
 484         int acquired = 0;
 485
 486         if(!get_context(&hac))
 487                 {
 488                 ENGINEerr(ENGINE_F_CSWIFT_MOD_EXP_CRT,ENGINE_R_GET_HANDLE_FAILED);
 489                 goto err;
 490                 }
 491         acquired = 1;
 492         /* Prepare the params */
 493         BN_CTX_start(ctx);
 494         rsa_p = BN_CTX_get(ctx);
 495         rsa_q = BN_CTX_get(ctx);
 496         rsa_dmp1 = BN_CTX_get(ctx);
 497         rsa_dmq1 = BN_CTX_get(ctx);
 498         rsa_iqmp = BN_CTX_get(ctx);
 499         argument = BN_CTX_get(ctx);
 500         result = BN_CTX_get(ctx);
 501         if(!result)
 502                 {
 503                 ENGINEerr(ENGINE_F_CSWIFT_MOD_EXP_CRT,ENGINE_R_BN_CTX_FULL);
 504                 goto err;
 505                 }
 506         if(!bn_wexpand(rsa_p, p->top) || !bn_wexpand(rsa_q, q->top) ||
 507                         !bn_wexpand(rsa_dmp1, dmp1->top) ||
 508                         !bn_wexpand(rsa_dmq1, dmq1->top) ||
 509                         !bn_wexpand(rsa_iqmp, iqmp->top) ||
 510                         !bn_wexpand(argument, a->top) ||
 511                         !bn_wexpand(result, p->top + q->top))
 512                 {
 513                 ENGINEerr(ENGINE_F_CSWIFT_MOD_EXP_CRT,ENGINE_R_BN_EXPAND_FAIL);
 514                 goto err;
 515                 }
 516         sw_param.type = SW_ALG_CRT;
 517         sw_param.up.crt.p.nbytes = BN_bn2bin(p, (unsigned char *)rsa_p->d);
 518         sw_param.up.crt.p.value = (unsigned char *)rsa_p->d;
 519         sw_param.up.crt.q.nbytes = BN_bn2bin(q, (unsigned char *)rsa_q->d);
 520         sw_param.up.crt.q.value = (unsigned char *)rsa_q->d;
 521         sw_param.up.crt.dmp1.nbytes = BN_bn2bin(dmp1,
 522                 (unsigned char *)rsa_dmp1->d);
 523         sw_param.up.crt.dmp1.value = (unsigned char *)rsa_dmp1->d;
 524         sw_param.up.crt.dmq1.nbytes = BN_bn2bin(dmq1,
 525                 (unsigned char *)rsa_dmq1->d);
 526         sw_param.up.crt.dmq1.value = (unsigned char *)rsa_dmq1->d;
 527         sw_param.up.crt.iqmp.nbytes = BN_bn2bin(iqmp,
 528                 (unsigned char *)rsa_iqmp->d);
 529         sw_param.up.crt.iqmp.value = (unsigned char *)rsa_iqmp->d;
 530         /* Attach the key params */
 531         sw_status = p_CSwift_AttachKeyParam(hac, &sw_param);
 532         switch(sw_status)
 533                 {
 534         case SW_OK:
 535                 break;
 536         case SW_ERR_INPUT_SIZE:
 537                 ENGINEerr(ENGINE_F_CSWIFT_MOD_EXP_CRT,
 538                         ENGINE_R_SIZE_TOO_LARGE_OR_TOO_SMALL);
 539                 goto err;
 540         default:
 541                 {
 542                 char tmpbuf[20];
 543                 ENGINEerr(ENGINE_F_CSWIFT_MOD_EXP_CRT,ENGINE_R_REQUEST_FAILED);
 544                 sprintf(tmpbuf, "%ld", sw_status);
 545                 ERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf);
 546                 }
 547                 goto err;
 548                 }
 549         /* Prepare the argument and response */
 550         arg.nbytes = BN_bn2bin(a, (unsigned char *)argument->d);
 551         arg.value = (unsigned char *)argument->d;
 552         res.nbytes = 2 * BN_num_bytes(p);
 553         memset(result->d, 0, res.nbytes);
 554         res.value = (unsigned char *)result->d;
 555         /* Perform the operation */
 556         if((sw_status = p_CSwift_SimpleRequest(hac, SW_CMD_MODEXP_CRT, &arg, 1,
 557                 &res, 1)) != SW_OK)
 558                 {
 559                 char tmpbuf[20];
 560                 ENGINEerr(ENGINE_F_CSWIFT_MOD_EXP_CRT,ENGINE_R_REQUEST_FAILED);
 561                 sprintf(tmpbuf, "%ld", sw_status);
 562                 ERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf);
 563                 goto err;
 564                 }
 565         /* Convert the response */
 566         BN_bin2bn((unsigned char *)result->d, res.nbytes, r);
 567         to_return = 1;
 568 err:
 569         if(acquired)
 570                 release_context(hac);
 571         BN_CTX_end(ctx);
 572         return to_return;
 573         }
 574
 575 static int cswift_rsa_mod_exp(BIGNUM *r0, const BIGNUM *I, RSA *rsa)
 576         {
 577         BN_CTX *ctx;
 578         int to_return = 0;
 579
 580         if((ctx = BN_CTX_new()) == NULL)
 581                 goto err;
 582         if(!rsa->p || !rsa->q || !rsa->dmp1 || !rsa->dmq1 || !rsa->iqmp)
 583                 {
 584                 ENGINEerr(ENGINE_F_CSWIFT_RSA_MOD_EXP,ENGINE_R_MISSING_KEY_COMPONENTS);
 585                 goto err;
 586                 }
 587         to_return = cswift_mod_exp_crt(r0, I, rsa->p, rsa->q, rsa->dmp1,
 588                 rsa->dmq1, rsa->iqmp, ctx);
 589 err:
 590         if(ctx)
 591                 BN_CTX_free(ctx);
 592         return to_return;
 593         }
 594
 595 /* This function is aliased to mod_exp (with the mont stuff dropped). */
 596 static int cswift_mod_exp_mont(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
 597                 const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx)
 598         {
 599         return cswift_mod_exp(r, a, p, m, ctx);
 600         }
 601
 602 static DSA_SIG *cswift_dsa_sign(const unsigned char *dgst, int dlen, DSA *dsa)
 603         {
 604         SW_CONTEXT_HANDLE hac;
 605         SW_PARAM sw_param;
 606         SW_STATUS sw_status;
 607         SW_LARGENUMBER arg, res;
 608         unsigned char *ptr;
 609         BN_CTX *ctx;
 610         BIGNUM *dsa_p = NULL;
 611         BIGNUM *dsa_q = NULL;
 612         BIGNUM *dsa_g = NULL;
 613         BIGNUM *dsa_key = NULL;
 614         BIGNUM *result = NULL;
 615         DSA_SIG *to_return = NULL;
 616         int acquired = 0;
 617
 618         if((ctx = BN_CTX_new()) == NULL)
 619                 goto err;
 620         if(!get_context(&hac))
 621                 {
 622                 ENGINEerr(ENGINE_F_CSWIFT_DSA_SIGN,ENGINE_R_GET_HANDLE_FAILED);
 623                 goto err;
 624                 }
 625         acquired = 1;
 626         /* Prepare the params */
 627         BN_CTX_start(ctx);
 628         dsa_p = BN_CTX_get(ctx);
 629         dsa_q = BN_CTX_get(ctx);
 630         dsa_g = BN_CTX_get(ctx);
 631         dsa_key = BN_CTX_get(ctx);
 632         result = BN_CTX_get(ctx);
 633         if(!result)
 634                 {
 635                 ENGINEerr(ENGINE_F_CSWIFT_DSA_SIGN,ENGINE_R_BN_CTX_FULL);
 636                 goto err;
 637                 }
 638         if(!bn_wexpand(dsa_p, dsa->p->top) ||
 639                         !bn_wexpand(dsa_q, dsa->q->top) ||
 640                         !bn_wexpand(dsa_g, dsa->g->top) ||
 641                         !bn_wexpand(dsa_key, dsa->priv_key->top) ||
 642                         !bn_wexpand(result, dsa->p->top))
 643                 {
 644                 ENGINEerr(ENGINE_F_CSWIFT_DSA_SIGN,ENGINE_R_BN_EXPAND_FAIL);
 645                 goto err;
 646                 }
 647         sw_param.type = SW_ALG_DSA;
 648         sw_param.up.dsa.p.nbytes = BN_bn2bin(dsa->p,
 649                                 (unsigned char *)dsa_p->d);
 650         sw_param.up.dsa.p.value = (unsigned char *)dsa_p->d;
 651         sw_param.up.dsa.q.nbytes = BN_bn2bin(dsa->q,
 652                                 (unsigned char *)dsa_q->d);
 653         sw_param.up.dsa.q.value = (unsigned char *)dsa_q->d;
 654         sw_param.up.dsa.g.nbytes = BN_bn2bin(dsa->g,
 655                                 (unsigned char *)dsa_g->d);
 656         sw_param.up.dsa.g.value = (unsigned char *)dsa_g->d;
 657         sw_param.up.dsa.key.nbytes = BN_bn2bin(dsa->priv_key,
 658                                 (unsigned char *)dsa_key->d);
 659         sw_param.up.dsa.key.value = (unsigned char *)dsa_key->d;
 660         /* Attach the key params */
 661         sw_status = p_CSwift_AttachKeyParam(hac, &sw_param);
 662         switch(sw_status)
 663                 {
 664         case SW_OK:
 665                 break;
 666         case SW_ERR_INPUT_SIZE:
 667                 ENGINEerr(ENGINE_F_CSWIFT_DSA_SIGN,
 668                         ENGINE_R_SIZE_TOO_LARGE_OR_TOO_SMALL);
 669                 goto err;
 670         default:
 671                 {
 672                 char tmpbuf[20];
 673                 ENGINEerr(ENGINE_F_CSWIFT_DSA_SIGN,ENGINE_R_REQUEST_FAILED);
 674                 sprintf(tmpbuf, "%ld", sw_status);
 675                 ERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf);
 676                 }
 677                 goto err;
 678                 }
 679         /* Prepare the argument and response */
 680         arg.nbytes = dlen;
 681         arg.value = (unsigned char *)dgst;
 682         res.nbytes = BN_num_bytes(dsa->p);
 683         memset(result->d, 0, res.nbytes);
 684         res.value = (unsigned char *)result->d;
 685         /* Perform the operation */
 686         sw_status = p_CSwift_SimpleRequest(hac, SW_CMD_DSS_SIGN, &arg, 1,
 687                 &res, 1);
 688         if(sw_status != SW_OK)
 689                 {
 690                 char tmpbuf[20];
 691                 ENGINEerr(ENGINE_F_CSWIFT_DSA_SIGN,ENGINE_R_REQUEST_FAILED);
 692                 sprintf(tmpbuf, "%ld", sw_status);
 693                 ERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf);
 694                 goto err;
 695                 }
 696         /* Convert the response */
 697         ptr = (unsigned char *)result->d;
 698         if((to_return = DSA_SIG_new()) == NULL)
 699                 goto err;
 700         to_return->r = BN_bin2bn((unsigned char *)result->d, 20, NULL);
 701         to_return->s = BN_bin2bn((unsigned char *)result->d + 20, 20, NULL);
 702
 703 err:
 704         if(acquired)
 705                 release_context(hac);
 706         if(ctx)
 707                 {
 708                 BN_CTX_end(ctx);
 709                 BN_CTX_free(ctx);
 710                 }
 711         return to_return;
 712         }
 713
 714 static int cswift_dsa_verify(const unsigned char *dgst, int dgst_len,
 715                                 DSA_SIG *sig, DSA *dsa)
 716         {
 717         SW_CONTEXT_HANDLE hac;
 718         SW_PARAM sw_param;
 719         SW_STATUS sw_status;
 720         SW_LARGENUMBER arg[2], res;
 721         unsigned long sig_result;
 722         BN_CTX *ctx;
 723         BIGNUM *dsa_p = NULL;
 724         BIGNUM *dsa_q = NULL;
 725         BIGNUM *dsa_g = NULL;
 726         BIGNUM *dsa_key = NULL;
 727         BIGNUM *argument = NULL;
 728         int to_return = -1;
 729         int acquired = 0;
 730
 731         if((ctx = BN_CTX_new()) == NULL)
 732                 goto err;
 733         if(!get_context(&hac))
 734                 {
 735                 ENGINEerr(ENGINE_F_CSWIFT_DSA_VERIFY,ENGINE_R_GET_HANDLE_FAILED);
 736                 goto err;
 737                 }
 738         acquired = 1;
 739         /* Prepare the params */
 740         BN_CTX_start(ctx);
 741         dsa_p = BN_CTX_get(ctx);
 742         dsa_q = BN_CTX_get(ctx);
 743         dsa_g = BN_CTX_get(ctx);
 744         dsa_key = BN_CTX_get(ctx);
 745         argument = BN_CTX_get(ctx);
 746         if(!argument)
 747                 {
 748                 ENGINEerr(ENGINE_F_CSWIFT_DSA_VERIFY,ENGINE_R_BN_CTX_FULL);
 749                 goto err;
 750                 }
 751         if(!bn_wexpand(dsa_p, dsa->p->top) ||
 752                         !bn_wexpand(dsa_q, dsa->q->top) ||
 753                         !bn_wexpand(dsa_g, dsa->g->top) ||
 754                         !bn_wexpand(dsa_key, dsa->pub_key->top) ||
 755                         !bn_wexpand(argument, 40))
 756                 {
 757                 ENGINEerr(ENGINE_F_CSWIFT_DSA_VERIFY,ENGINE_R_BN_EXPAND_FAIL);
 758                 goto err;
 759                 }
 760         sw_param.type = SW_ALG_DSA;
 761         sw_param.up.dsa.p.nbytes = BN_bn2bin(dsa->p,
 762                                 (unsigned char *)dsa_p->d);
 763         sw_param.up.dsa.p.value = (unsigned char *)dsa_p->d;
 764         sw_param.up.dsa.q.nbytes = BN_bn2bin(dsa->q,
 765                                 (unsigned char *)dsa_q->d);
 766         sw_param.up.dsa.q.value = (unsigned char *)dsa_q->d;
 767         sw_param.up.dsa.g.nbytes = BN_bn2bin(dsa->g,
 768                                 (unsigned char *)dsa_g->d);
 769         sw_param.up.dsa.g.value = (unsigned char *)dsa_g->d;
 770         sw_param.up.dsa.key.nbytes = BN_bn2bin(dsa->pub_key,
 771                                 (unsigned char *)dsa_key->d);
 772         sw_param.up.dsa.key.value = (unsigned char *)dsa_key->d;
 773         /* Attach the key params */
 774         sw_status = p_CSwift_AttachKeyParam(hac, &sw_param);
 775         switch(sw_status)
 776                 {
 777         case SW_OK:
 778                 break;
 779         case SW_ERR_INPUT_SIZE:
 780                 ENGINEerr(ENGINE_F_CSWIFT_DSA_VERIFY,
 781                         ENGINE_R_SIZE_TOO_LARGE_OR_TOO_SMALL);
 782                 goto err;
 783         default:
 784                 {
 785                 char tmpbuf[20];
 786                 ENGINEerr(ENGINE_F_CSWIFT_DSA_VERIFY,ENGINE_R_REQUEST_FAILED);
 787                 sprintf(tmpbuf, "%ld", sw_status);
 788                 ERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf);
 789                 }
 790                 goto err;
 791                 }
 792         /* Prepare the argument and response */
 793         arg[0].nbytes = dgst_len;
 794         arg[0].value = (unsigned char *)dgst;
 795         arg[1].nbytes = 40;
 796         arg[1].value = (unsigned char *)argument->d;
 797         memset(arg[1].value, 0, 40);
 798         BN_bn2bin(sig->r, arg[1].value + 20 - BN_num_bytes(sig->r));
 799         BN_bn2bin(sig->s, arg[1].value + 40 - BN_num_bytes(sig->s));
 800         res.nbytes = 4; /* unsigned long */
 801         res.value = (unsigned char *)(&sig_result);
 802         /* Perform the operation */
 803         sw_status = p_CSwift_SimpleRequest(hac, SW_CMD_DSS_VERIFY, arg, 2,
 804                 &res, 1);
 805         if(sw_status != SW_OK)
 806                 {
 807                 char tmpbuf[20];
 808                 ENGINEerr(ENGINE_F_CSWIFT_DSA_VERIFY,ENGINE_R_REQUEST_FAILED);
 809                 sprintf(tmpbuf, "%ld", sw_status);
 810                 ERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf);
 811                 goto err;
 812                 }
 813         /* Convert the response */
 814         to_return = ((sig_result == 0) ? 0 : 1);
 815
 816 err:
 817         if(acquired)
 818                 release_context(hac);
 819         if(ctx)
 820                 {
 821                 BN_CTX_end(ctx);
 822                 BN_CTX_free(ctx);
 823                 }
 824         return to_return;
 825         }
 826
 827 /* This function is aliased to mod_exp (with the dh and mont dropped). */
 828 static int cswift_mod_exp_dh(const DH *dh, BIGNUM *r,
 829                 const BIGNUM *a, const BIGNUM *p,
 830                 const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx)
 831         {
 832         return cswift_mod_exp(r, a, p, m, ctx);
 833         }
 834
 835 #endif /* !OPENSSL_NO_HW_CSWIFT */
 836 #endif /* !OPENSSL_NO_HW */