engines/e_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) 1999-2001 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 <string.h>
  61 #include <openssl/crypto.h>
  62 #include <openssl/buffer.h>
  63 #include <openssl/dso.h>
  64 #include <openssl/engine.h>
  65 #ifndef OPENSSL_NO_RSA
  66 #include <openssl/rsa.h>
  67 #endif
  68 #ifndef OPENSSL_NO_DSA
  69 #include <openssl/dsa.h>
  70 #endif
  71 #ifndef OPENSSL_NO_DH
  72 #include <openssl/dh.h>
  73 #endif
  74 #include <openssl/rand.h>
  75 #include <openssl/bn.h>
  76
  77 #ifndef OPENSSL_NO_HW
  78 #ifndef OPENSSL_NO_HW_CSWIFT
  79
  80 /* Attribution notice: Rainbow have generously allowed me to reproduce
  81  * the necessary definitions here from their API. This means the support
  82  * can build independently of whether application builders have the
  83  * API or hardware. This will allow developers to easily produce software
  84  * that has latent hardware support for any users that have accelerators
  85  * installed, without the developers themselves needing anything extra.
  86  *
  87  * I have only clipped the parts from the CryptoSwift header files that
  88  * are (or seem) relevant to the CryptoSwift support code. This is
  89  * simply to keep the file sizes reasonable.
  90  * [Geoff]
  91  */
  92 #ifdef FLAT_INC
  93 #include "cswift.h"
  94 #else
  95 #include "vendor_defns/cswift.h"
  96 #endif
  97
  98 #define CSWIFT_LIB_NAME "cswift engine"
  99 #include "e_cswift_err.c"
 100
 101 #define DECIMAL_SIZE(type)      ((sizeof(type)*8+2)/3+1)
 102
 103 static int cswift_destroy(ENGINE *e);
 104 static int cswift_init(ENGINE *e);
 105 static int cswift_finish(ENGINE *e);
 106 static int cswift_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f)(void));
 107 #ifndef OPENSSL_NO_RSA
 108 static int cswift_bn_32copy(SW_LARGENUMBER * out, const BIGNUM * in);
 109 #endif
 110
 111 /* BIGNUM stuff */
 112 static int cswift_mod_exp(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
 113                 const BIGNUM *m, BN_CTX *ctx);
 114 #ifndef OPENSSL_NO_RSA
 115 static int cswift_mod_exp_crt(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
 116                 const BIGNUM *q, const BIGNUM *dmp1, const BIGNUM *dmq1,
 117                 const BIGNUM *iqmp, BN_CTX *ctx);
 118 #endif
 119
 120 #ifndef OPENSSL_NO_RSA
 121 /* RSA stuff */
 122 static int cswift_rsa_mod_exp(BIGNUM *r0, const BIGNUM *I, RSA *rsa, BN_CTX *ctx);
 123 /* This function is aliased to mod_exp (with the mont stuff dropped). */
 124 static int cswift_mod_exp_mont(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
 125                 const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx);
 126 #endif
 127
 128 #ifndef OPENSSL_NO_DSA
 129 /* DSA stuff */
 130 static DSA_SIG *cswift_dsa_sign(const unsigned char *dgst, int dlen, DSA *dsa);
 131 static int cswift_dsa_verify(const unsigned char *dgst, int dgst_len,
 132                                 DSA_SIG *sig, DSA *dsa);
 133 #endif
 134
 135 #ifndef OPENSSL_NO_DH
 136 /* DH stuff */
 137 /* This function is alised to mod_exp (with the DH and mont dropped). */
 138 static int cswift_mod_exp_dh(const DH *dh, BIGNUM *r,
 139                 const BIGNUM *a, const BIGNUM *p,
 140                 const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx);
 141 #endif
 142
 143 /* RAND stuff */
 144 static int cswift_rand_bytes(unsigned char *buf, int num);
 145 static int cswift_rand_status(void);
 146
 147 /* The definitions for control commands specific to this engine */
 148 #define CSWIFT_CMD_SO_PATH              ENGINE_CMD_BASE
 149 static const ENGINE_CMD_DEFN cswift_cmd_defns[] = {
 150         {CSWIFT_CMD_SO_PATH,
 151                 "SO_PATH",
 152                 "Specifies the path to the 'cswift' shared library",
 153                 ENGINE_CMD_FLAG_STRING},
 154         {0, NULL, NULL, 0}
 155         };
 156
 157 #ifndef OPENSSL_NO_RSA
 158 /* Our internal RSA_METHOD that we provide pointers to */
 159 static RSA_METHOD cswift_rsa =
 160         {
 161         "CryptoSwift RSA method",
 162         NULL,
 163         NULL,
 164         NULL,
 165         NULL,
 166         cswift_rsa_mod_exp,
 167         cswift_mod_exp_mont,
 168         NULL,
 169         NULL,
 170         0,
 171         NULL,
 172         NULL,
 173         NULL,
 174         NULL
 175         };
 176 #endif
 177
 178 #ifndef OPENSSL_NO_DSA
 179 /* Our internal DSA_METHOD that we provide pointers to */
 180 static DSA_METHOD cswift_dsa =
 181         {
 182         "CryptoSwift DSA method",
 183         cswift_dsa_sign,
 184         NULL, /* dsa_sign_setup */
 185         cswift_dsa_verify,
 186         NULL, /* dsa_mod_exp */
 187         NULL, /* bn_mod_exp */
 188         NULL, /* init */
 189         NULL, /* finish */
 190         0, /* flags */
 191         NULL, /* app_data */
 192         NULL, /* dsa_paramgen */
 193         NULL /* dsa_keygen */
 194         };
 195 #endif
 196
 197 #ifndef OPENSSL_NO_DH
 198 /* Our internal DH_METHOD that we provide pointers to */
 199 static DH_METHOD cswift_dh =
 200         {
 201         "CryptoSwift DH method",
 202         NULL,
 203         NULL,
 204         cswift_mod_exp_dh,
 205         NULL,
 206         NULL,
 207         0,
 208         NULL,
 209         NULL
 210         };
 211 #endif
 212
 213 static RAND_METHOD cswift_random =
 214     {
 215     /* "CryptoSwift RAND method", */
 216     NULL,
 217     cswift_rand_bytes,
 218     NULL,
 219     NULL,
 220     cswift_rand_bytes,
 221     cswift_rand_status,
 222     };
 223
 224
 225 /* Constants used when creating the ENGINE */
 226 static const char *engine_cswift_id = "cswift";
 227 static const char *engine_cswift_name = "CryptoSwift hardware engine support";
 228
 229 /* This internal function is used by ENGINE_cswift() and possibly by the
 230  * "dynamic" ENGINE support too */
 231 static int bind_helper(ENGINE *e)
 232         {
 233 #ifndef OPENSSL_NO_RSA
 234         const RSA_METHOD *meth1;
 235 #endif
 236 #ifndef OPENSSL_NO_DH
 237         const DH_METHOD *meth2;
 238 #endif
 239         if(!ENGINE_set_id(e, engine_cswift_id) ||
 240                         !ENGINE_set_name(e, engine_cswift_name) ||
 241 #ifndef OPENSSL_NO_RSA
 242                         !ENGINE_set_RSA(e, &cswift_rsa) ||
 243 #endif
 244 #ifndef OPENSSL_NO_DSA
 245                         !ENGINE_set_DSA(e, &cswift_dsa) ||
 246 #endif
 247 #ifndef OPENSSL_NO_DH
 248                         !ENGINE_set_DH(e, &cswift_dh) ||
 249 #endif
 250                         !ENGINE_set_RAND(e, &cswift_random) ||
 251                         !ENGINE_set_destroy_function(e, cswift_destroy) ||
 252                         !ENGINE_set_init_function(e, cswift_init) ||
 253                         !ENGINE_set_finish_function(e, cswift_finish) ||
 254                         !ENGINE_set_ctrl_function(e, cswift_ctrl) ||
 255                         !ENGINE_set_cmd_defns(e, cswift_cmd_defns))
 256                 return 0;
 257
 258 #ifndef OPENSSL_NO_RSA
 259         /* We know that the "PKCS1_SSLeay()" functions hook properly
 260          * to the cswift-specific mod_exp and mod_exp_crt so we use
 261          * those functions. NB: We don't use ENGINE_openssl() or
 262          * anything "more generic" because something like the RSAref
 263          * code may not hook properly, and if you own one of these
 264          * cards then you have the right to do RSA operations on it
 265          * anyway! */
 266         meth1 = RSA_PKCS1_SSLeay();
 267         cswift_rsa.rsa_pub_enc = meth1->rsa_pub_enc;
 268         cswift_rsa.rsa_pub_dec = meth1->rsa_pub_dec;
 269         cswift_rsa.rsa_priv_enc = meth1->rsa_priv_enc;
 270         cswift_rsa.rsa_priv_dec = meth1->rsa_priv_dec;
 271 #endif
 272
 273 #ifndef OPENSSL_NO_DH
 274         /* Much the same for Diffie-Hellman */
 275         meth2 = DH_OpenSSL();
 276         cswift_dh.generate_key = meth2->generate_key;
 277         cswift_dh.compute_key = meth2->compute_key;
 278 #endif
 279
 280         /* Ensure the cswift error handling is set up */
 281         ERR_load_CSWIFT_strings();
 282         return 1;
 283         }
 284
 285 #ifdef OPENSSL_NO_DYNAMIC_ENGINE
 286 static ENGINE *engine_cswift(void)
 287         {
 288         ENGINE *ret = ENGINE_new();
 289         if(!ret)
 290                 return NULL;
 291         if(!bind_helper(ret))
 292                 {
 293                 ENGINE_free(ret);
 294                 return NULL;
 295                 }
 296         return ret;
 297         }
 298
 299 void ENGINE_load_cswift(void)
 300         {
 301         /* Copied from eng_[openssl|dyn].c */
 302         ENGINE *toadd = engine_cswift();
 303         if(!toadd) return;
 304         ENGINE_add(toadd);
 305         ENGINE_free(toadd);
 306         ERR_clear_error();
 307         }
 308 #endif
 309
 310 /* This is a process-global DSO handle used for loading and unloading
 311  * the CryptoSwift library. NB: This is only set (or unset) during an
 312  * init() or finish() call (reference counts permitting) and they're
 313  * operating with global locks, so this should be thread-safe
 314  * implicitly. */
 315 static DSO *cswift_dso = NULL;
 316
 317 /* These are the function pointers that are (un)set when the library has
 318  * successfully (un)loaded. */
 319 t_swAcquireAccContext *p_CSwift_AcquireAccContext = NULL;
 320 t_swAttachKeyParam *p_CSwift_AttachKeyParam = NULL;
 321 t_swSimpleRequest *p_CSwift_SimpleRequest = NULL;
 322 t_swReleaseAccContext *p_CSwift_ReleaseAccContext = NULL;
 323
 324 /* Used in the DSO operations. */
 325 static const char *CSWIFT_LIBNAME = NULL;
 326 static const char *get_CSWIFT_LIBNAME(void)
 327         {
 328         if(CSWIFT_LIBNAME)
 329                 return CSWIFT_LIBNAME;
 330         return "swift";
 331         }
 332 static void free_CSWIFT_LIBNAME(void)
 333         {
 334         if(CSWIFT_LIBNAME)
 335                 OPENSSL_free((void*)CSWIFT_LIBNAME);
 336         CSWIFT_LIBNAME = NULL;
 337         }
 338 static long set_CSWIFT_LIBNAME(const char *name)
 339         {
 340         free_CSWIFT_LIBNAME();
 341         return (((CSWIFT_LIBNAME = BUF_strdup(name)) != NULL) ? 1 : 0);
 342         }
 343 static const char *CSWIFT_F1 = "swAcquireAccContext";
 344 static const char *CSWIFT_F2 = "swAttachKeyParam";
 345 static const char *CSWIFT_F3 = "swSimpleRequest";
 346 static const char *CSWIFT_F4 = "swReleaseAccContext";
 347
 348
 349 /* CryptoSwift library functions and mechanics - these are used by the
 350  * higher-level functions further down. NB: As and where there's no
 351  * error checking, take a look lower down where these functions are
 352  * called, the checking and error handling is probably down there. */
 353
 354 /* utility function to obtain a context */
 355 static int get_context(SW_CONTEXT_HANDLE *hac)
 356         {
 357         SW_STATUS status;
 358
 359         status = p_CSwift_AcquireAccContext(hac);
 360         if(status != SW_OK)
 361                 return 0;
 362         return 1;
 363         }
 364
 365 /* similarly to release one. */
 366 static void release_context(SW_CONTEXT_HANDLE hac)
 367         {
 368         p_CSwift_ReleaseAccContext(hac);
 369         }
 370
 371 /* Destructor (complements the "ENGINE_cswift()" constructor) */
 372 static int cswift_destroy(ENGINE *e)
 373         {
 374         free_CSWIFT_LIBNAME();
 375         ERR_unload_CSWIFT_strings();
 376         return 1;
 377         }
 378
 379 /* (de)initialisation functions. */
 380 static int cswift_init(ENGINE *e)
 381         {
 382         SW_CONTEXT_HANDLE hac;
 383         t_swAcquireAccContext *p1;
 384         t_swAttachKeyParam *p2;
 385         t_swSimpleRequest *p3;
 386         t_swReleaseAccContext *p4;
 387
 388         if(cswift_dso != NULL)
 389                 {
 390                 CSWIFTerr(CSWIFT_F_CSWIFT_INIT,CSWIFT_R_ALREADY_LOADED);
 391                 goto err;
 392                 }
 393         /* Attempt to load libswift.so/swift.dll/whatever. */
 394         cswift_dso = DSO_load(NULL, get_CSWIFT_LIBNAME(), NULL, 0);
 395         if(cswift_dso == NULL)
 396                 {
 397                 CSWIFTerr(CSWIFT_F_CSWIFT_INIT,CSWIFT_R_NOT_LOADED);
 398                 goto err;
 399                 }
 400         if(!(p1 = (t_swAcquireAccContext *)
 401                                 DSO_bind_func(cswift_dso, CSWIFT_F1)) ||
 402                         !(p2 = (t_swAttachKeyParam *)
 403                                 DSO_bind_func(cswift_dso, CSWIFT_F2)) ||
 404                         !(p3 = (t_swSimpleRequest *)
 405                                 DSO_bind_func(cswift_dso, CSWIFT_F3)) ||
 406                         !(p4 = (t_swReleaseAccContext *)
 407                                 DSO_bind_func(cswift_dso, CSWIFT_F4)))
 408                 {
 409                 CSWIFTerr(CSWIFT_F_CSWIFT_INIT,CSWIFT_R_NOT_LOADED);
 410                 goto err;
 411                 }
 412         /* Copy the pointers */
 413         p_CSwift_AcquireAccContext = p1;
 414         p_CSwift_AttachKeyParam = p2;
 415         p_CSwift_SimpleRequest = p3;
 416         p_CSwift_ReleaseAccContext = p4;
 417         /* Try and get a context - if not, we may have a DSO but no
 418          * accelerator! */
 419         if(!get_context(&hac))
 420                 {
 421                 CSWIFTerr(CSWIFT_F_CSWIFT_INIT,CSWIFT_R_UNIT_FAILURE);
 422                 goto err;
 423                 }
 424         release_context(hac);
 425         /* Everything's fine. */
 426         return 1;
 427 err:
 428         if(cswift_dso)
 429         {
 430                 DSO_free(cswift_dso);
 431                 cswift_dso = NULL;
 432         }
 433         p_CSwift_AcquireAccContext = NULL;
 434         p_CSwift_AttachKeyParam = NULL;
 435         p_CSwift_SimpleRequest = NULL;
 436         p_CSwift_ReleaseAccContext = NULL;
 437         return 0;
 438         }
 439
 440 static int cswift_finish(ENGINE *e)
 441         {
 442         free_CSWIFT_LIBNAME();
 443         if(cswift_dso == NULL)
 444                 {
 445                 CSWIFTerr(CSWIFT_F_CSWIFT_FINISH,CSWIFT_R_NOT_LOADED);
 446                 return 0;
 447                 }
 448         if(!DSO_free(cswift_dso))
 449                 {
 450                 CSWIFTerr(CSWIFT_F_CSWIFT_FINISH,CSWIFT_R_UNIT_FAILURE);
 451                 return 0;
 452                 }
 453         cswift_dso = NULL;
 454         p_CSwift_AcquireAccContext = NULL;
 455         p_CSwift_AttachKeyParam = NULL;
 456         p_CSwift_SimpleRequest = NULL;
 457         p_CSwift_ReleaseAccContext = NULL;
 458         return 1;
 459         }
 460
 461 static int cswift_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f)(void))
 462         {
 463         int initialised = ((cswift_dso == NULL) ? 0 : 1);
 464         switch(cmd)
 465                 {
 466         case CSWIFT_CMD_SO_PATH:
 467                 if(p == NULL)
 468                         {
 469                         CSWIFTerr(CSWIFT_F_CSWIFT_CTRL,ERR_R_PASSED_NULL_PARAMETER);
 470                         return 0;
 471                         }
 472                 if(initialised)
 473                         {
 474                         CSWIFTerr(CSWIFT_F_CSWIFT_CTRL,CSWIFT_R_ALREADY_LOADED);
 475                         return 0;
 476                         }
 477                 return set_CSWIFT_LIBNAME((const char *)p);
 478         default:
 479                 break;
 480                 }
 481         CSWIFTerr(CSWIFT_F_CSWIFT_CTRL,CSWIFT_R_CTRL_COMMAND_NOT_IMPLEMENTED);
 482         return 0;
 483         }
 484
 485 /* Un petit mod_exp */
 486 static int cswift_mod_exp(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
 487                         const BIGNUM *m, BN_CTX *ctx)
 488         {
 489         /* I need somewhere to store temporary serialised values for
 490          * use with the CryptoSwift API calls. A neat cheat - I'll use
 491          * BIGNUMs from the BN_CTX but access their arrays directly as
 492          * byte arrays <grin>. This way I don't have to clean anything
 493          * up. */
 494         BIGNUM *modulus;
 495         BIGNUM *exponent;
 496         BIGNUM *argument;
 497         BIGNUM *result;
 498         SW_STATUS sw_status;
 499         SW_LARGENUMBER arg, res;
 500         SW_PARAM sw_param;
 501         SW_CONTEXT_HANDLE hac;
 502         int to_return, acquired;
 503
 504         modulus = exponent = argument = result = NULL;
 505         to_return = 0; /* expect failure */
 506         acquired = 0;
 507
 508         if(!get_context(&hac))
 509                 {
 510                 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP,CSWIFT_R_UNIT_FAILURE);
 511                 goto err;
 512                 }
 513         acquired = 1;
 514         /* Prepare the params */
 515         BN_CTX_start(ctx);
 516         modulus = BN_CTX_get(ctx);
 517         exponent = BN_CTX_get(ctx);
 518         argument = BN_CTX_get(ctx);
 519         result = BN_CTX_get(ctx);
 520         if(!result)
 521                 {
 522                 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP,CSWIFT_R_BN_CTX_FULL);
 523                 goto err;
 524                 }
 525         if(!bn_wexpand(modulus, m->top) || !bn_wexpand(exponent, p->top) ||
 526                 !bn_wexpand(argument, a->top) || !bn_wexpand(result, m->top))
 527                 {
 528                 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP,CSWIFT_R_BN_EXPAND_FAIL);
 529                 goto err;
 530                 }
 531         sw_param.type = SW_ALG_EXP;
 532         sw_param.up.exp.modulus.nbytes = BN_bn2bin(m,
 533                 (unsigned char *)modulus->d);
 534         sw_param.up.exp.modulus.value = (unsigned char *)modulus->d;
 535         sw_param.up.exp.exponent.nbytes = BN_bn2bin(p,
 536                 (unsigned char *)exponent->d);
 537         sw_param.up.exp.exponent.value = (unsigned char *)exponent->d;
 538         /* Attach the key params */
 539         sw_status = p_CSwift_AttachKeyParam(hac, &sw_param);
 540         switch(sw_status)
 541                 {
 542         case SW_OK:
 543                 break;
 544         case SW_ERR_INPUT_SIZE:
 545                 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP,CSWIFT_R_BAD_KEY_SIZE);
 546                 goto err;
 547         default:
 548                 {
 549                 char tmpbuf[DECIMAL_SIZE(sw_status)+1];
 550                 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP,CSWIFT_R_REQUEST_FAILED);
 551                 sprintf(tmpbuf, "%ld", sw_status);
 552                 ERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf);
 553                 }
 554                 goto err;
 555                 }
 556         /* Prepare the argument and response */
 557         arg.nbytes = BN_bn2bin(a, (unsigned char *)argument->d);
 558         arg.value = (unsigned char *)argument->d;
 559         res.nbytes = BN_num_bytes(m);
 560         memset(result->d, 0, res.nbytes);
 561         res.value = (unsigned char *)result->d;
 562         /* Perform the operation */
 563         if((sw_status = p_CSwift_SimpleRequest(hac, SW_CMD_MODEXP, &arg, 1,
 564                 &res, 1)) != SW_OK)
 565                 {
 566                 char tmpbuf[DECIMAL_SIZE(sw_status)+1];
 567                 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP,CSWIFT_R_REQUEST_FAILED);
 568                 sprintf(tmpbuf, "%ld", sw_status);
 569                 ERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf);
 570                 goto err;
 571                 }
 572         /* Convert the response */
 573         BN_bin2bn((unsigned char *)result->d, res.nbytes, r);
 574         to_return = 1;
 575 err:
 576         if(acquired)
 577                 release_context(hac);
 578         BN_CTX_end(ctx);
 579         return to_return;
 580         }
 581
 582
 583 #ifndef OPENSSL_NO_RSA
 584 int cswift_bn_32copy(SW_LARGENUMBER * out, const BIGNUM * in)
 585 {
 586         int mod;
 587         int numbytes = BN_num_bytes(in);
 588
 589         mod = 0;
 590         while( ((out->nbytes = (numbytes+mod)) % 32) )
 591         {
 592                 mod++;
 593         }
 594         out->value = (unsigned char*)OPENSSL_malloc(out->nbytes);
 595         if(!out->value)
 596         {
 597                 return 0;
 598         }
 599         BN_bn2bin(in, &out->value[mod]);
 600         if(mod)
 601                 memset(out->value, 0, mod);
 602
 603         return 1;
 604 }
 605 #endif
 606
 607 #ifndef OPENSSL_NO_RSA
 608 /* Un petit mod_exp chinois */
 609 static int cswift_mod_exp_crt(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
 610                         const BIGNUM *q, const BIGNUM *dmp1,
 611                         const BIGNUM *dmq1, const BIGNUM *iqmp, BN_CTX *ctx)
 612         {
 613         SW_STATUS sw_status;
 614         SW_LARGENUMBER arg, res;
 615         SW_PARAM sw_param;
 616         SW_CONTEXT_HANDLE hac;
 617         BIGNUM *result = NULL;
 618         BIGNUM *argument = NULL;
 619         int to_return = 0; /* expect failure */
 620         int acquired = 0;
 621
 622         sw_param.up.crt.p.value = NULL;
 623         sw_param.up.crt.q.value = NULL;
 624         sw_param.up.crt.dmp1.value = NULL;
 625         sw_param.up.crt.dmq1.value = NULL;
 626         sw_param.up.crt.iqmp.value = NULL;
 627
 628         if(!get_context(&hac))
 629                 {
 630                 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP_CRT,CSWIFT_R_UNIT_FAILURE);
 631                 goto err;
 632                 }
 633         acquired = 1;
 634
 635         /* Prepare the params */
 636         argument = BN_new();
 637         result = BN_new();
 638         if(!result || !argument)
 639                 {
 640                 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP_CRT,CSWIFT_R_BN_CTX_FULL);
 641                 goto err;
 642                 }
 643
 644
 645         sw_param.type = SW_ALG_CRT;
 646         /************************************************************************/
 647         /* 04/02/2003                                                           */
 648         /* Modified by Frederic Giudicelli (deny-all.com) to overcome the       */
 649         /* limitation of cswift with values not a multiple of 32                */
 650         /************************************************************************/
 651         if(!cswift_bn_32copy(&sw_param.up.crt.p, p))
 652         {
 653                 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP_CRT,CSWIFT_R_BN_EXPAND_FAIL);
 654                 goto err;
 655         }
 656         if(!cswift_bn_32copy(&sw_param.up.crt.q, q))
 657         {
 658                 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP_CRT,CSWIFT_R_BN_EXPAND_FAIL);
 659                 goto err;
 660         }
 661         if(!cswift_bn_32copy(&sw_param.up.crt.dmp1, dmp1))
 662         {
 663                 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP_CRT,CSWIFT_R_BN_EXPAND_FAIL);
 664                 goto err;
 665         }
 666         if(!cswift_bn_32copy(&sw_param.up.crt.dmq1, dmq1))
 667         {
 668                 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP_CRT,CSWIFT_R_BN_EXPAND_FAIL);
 669                 goto err;
 670         }
 671         if(!cswift_bn_32copy(&sw_param.up.crt.iqmp, iqmp))
 672         {
 673                 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP_CRT,CSWIFT_R_BN_EXPAND_FAIL);
 674                 goto err;
 675         }
 676         if(     !bn_wexpand(argument, a->top) ||
 677                         !bn_wexpand(result, p->top + q->top))
 678                 {
 679                 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP_CRT,CSWIFT_R_BN_EXPAND_FAIL);
 680                 goto err;
 681                 }
 682
 683         /* Attach the key params */
 684         sw_status = p_CSwift_AttachKeyParam(hac, &sw_param);
 685         switch(sw_status)
 686                 {
 687         case SW_OK:
 688                 break;
 689         case SW_ERR_INPUT_SIZE:
 690                 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP_CRT,CSWIFT_R_BAD_KEY_SIZE);
 691                 goto err;
 692         default:
 693                 {
 694                 char tmpbuf[DECIMAL_SIZE(sw_status)+1];
 695                 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP_CRT,CSWIFT_R_REQUEST_FAILED);
 696                 sprintf(tmpbuf, "%ld", sw_status);
 697                 ERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf);
 698                 }
 699                 goto err;
 700                 }
 701         /* Prepare the argument and response */
 702         arg.nbytes = BN_bn2bin(a, (unsigned char *)argument->d);
 703         arg.value = (unsigned char *)argument->d;
 704         res.nbytes = 2 * BN_num_bytes(p);
 705         memset(result->d, 0, res.nbytes);
 706         res.value = (unsigned char *)result->d;
 707         /* Perform the operation */
 708         if((sw_status = p_CSwift_SimpleRequest(hac, SW_CMD_MODEXP_CRT, &arg, 1,
 709                 &res, 1)) != SW_OK)
 710                 {
 711                 char tmpbuf[DECIMAL_SIZE(sw_status)+1];
 712                 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP_CRT,CSWIFT_R_REQUEST_FAILED);
 713                 sprintf(tmpbuf, "%ld", sw_status);
 714                 ERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf);
 715                 goto err;
 716                 }
 717         /* Convert the response */
 718         BN_bin2bn((unsigned char *)result->d, res.nbytes, r);
 719         to_return = 1;
 720 err:
 721         if(sw_param.up.crt.p.value)
 722                 OPENSSL_free(sw_param.up.crt.p.value);
 723         if(sw_param.up.crt.q.value)
 724                 OPENSSL_free(sw_param.up.crt.q.value);
 725         if(sw_param.up.crt.dmp1.value)
 726                 OPENSSL_free(sw_param.up.crt.dmp1.value);
 727         if(sw_param.up.crt.dmq1.value)
 728                 OPENSSL_free(sw_param.up.crt.dmq1.value);
 729         if(sw_param.up.crt.iqmp.value)
 730                 OPENSSL_free(sw_param.up.crt.iqmp.value);
 731         if(result)
 732                 BN_free(result);
 733         if(argument)
 734                 BN_free(argument);
 735         if(acquired)
 736                 release_context(hac);
 737         return to_return;
 738         }
 739 #endif
 740
 741 #ifndef OPENSSL_NO_RSA
 742 static int cswift_rsa_mod_exp(BIGNUM *r0, const BIGNUM *I, RSA *rsa, BN_CTX *ctx)
 743         {
 744         int to_return = 0;
 745         const RSA_METHOD * def_rsa_method;
 746
 747         if(!rsa->p || !rsa->q || !rsa->dmp1 || !rsa->dmq1 || !rsa->iqmp)
 748                 {
 749                 CSWIFTerr(CSWIFT_F_CSWIFT_RSA_MOD_EXP,CSWIFT_R_MISSING_KEY_COMPONENTS);
 750                 goto err;
 751                 }
 752
 753         /* Try the limits of RSA (2048 bits) */
 754         if(BN_num_bytes(rsa->p) > 128 ||
 755                 BN_num_bytes(rsa->q) > 128 ||
 756                 BN_num_bytes(rsa->dmp1) > 128 ||
 757                 BN_num_bytes(rsa->dmq1) > 128 ||
 758                 BN_num_bytes(rsa->iqmp) > 128)
 759         {
 760 #ifdef RSA_NULL
 761                 def_rsa_method=RSA_null_method();
 762 #else
 763 #if 0
 764                 def_rsa_method=RSA_PKCS1_RSAref();
 765 #else
 766                 def_rsa_method=RSA_PKCS1_SSLeay();
 767 #endif
 768 #endif
 769                 if(def_rsa_method)
 770                         return def_rsa_method->rsa_mod_exp(r0, I, rsa, ctx);
 771         }
 772
 773         to_return = cswift_mod_exp_crt(r0, I, rsa->p, rsa->q, rsa->dmp1,
 774                 rsa->dmq1, rsa->iqmp, ctx);
 775 err:
 776         return to_return;
 777         }
 778
 779 /* This function is aliased to mod_exp (with the mont stuff dropped). */
 780 static int cswift_mod_exp_mont(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
 781                 const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx)
 782         {
 783         const RSA_METHOD * def_rsa_method;
 784
 785         /* Try the limits of RSA (2048 bits) */
 786         if(BN_num_bytes(r) > 256 ||
 787                 BN_num_bytes(a) > 256 ||
 788                 BN_num_bytes(m) > 256)
 789         {
 790 #ifdef RSA_NULL
 791                 def_rsa_method=RSA_null_method();
 792 #else
 793 #if 0
 794                 def_rsa_method=RSA_PKCS1_RSAref();
 795 #else
 796                 def_rsa_method=RSA_PKCS1_SSLeay();
 797 #endif
 798 #endif
 799                 if(def_rsa_method)
 800                         return def_rsa_method->bn_mod_exp(r, a, p, m, ctx, m_ctx);
 801         }
 802
 803         return cswift_mod_exp(r, a, p, m, ctx);
 804         }
 805 #endif  /* OPENSSL_NO_RSA */
 806
 807 #ifndef OPENSSL_NO_DSA
 808 static DSA_SIG *cswift_dsa_sign(const unsigned char *dgst, int dlen, DSA *dsa)
 809         {
 810         SW_CONTEXT_HANDLE hac;
 811         SW_PARAM sw_param;
 812         SW_STATUS sw_status;
 813         SW_LARGENUMBER arg, res;
 814         BN_CTX *ctx;
 815         BIGNUM *dsa_p = NULL;
 816         BIGNUM *dsa_q = NULL;
 817         BIGNUM *dsa_g = NULL;
 818         BIGNUM *dsa_key = NULL;
 819         BIGNUM *result = NULL;
 820         DSA_SIG *to_return = NULL;
 821         int acquired = 0;
 822
 823         if((ctx = BN_CTX_new()) == NULL)
 824                 goto err;
 825         if(!get_context(&hac))
 826                 {
 827                 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_SIGN,CSWIFT_R_UNIT_FAILURE);
 828                 goto err;
 829                 }
 830         acquired = 1;
 831         /* Prepare the params */
 832         BN_CTX_start(ctx);
 833         dsa_p = BN_CTX_get(ctx);
 834         dsa_q = BN_CTX_get(ctx);
 835         dsa_g = BN_CTX_get(ctx);
 836         dsa_key = BN_CTX_get(ctx);
 837         result = BN_CTX_get(ctx);
 838         if(!result)
 839                 {
 840                 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_SIGN,CSWIFT_R_BN_CTX_FULL);
 841                 goto err;
 842                 }
 843         if(!bn_wexpand(dsa_p, dsa->p->top) ||
 844                         !bn_wexpand(dsa_q, dsa->q->top) ||
 845                         !bn_wexpand(dsa_g, dsa->g->top) ||
 846                         !bn_wexpand(dsa_key, dsa->priv_key->top) ||
 847                         !bn_wexpand(result, dsa->p->top))
 848                 {
 849                 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_SIGN,CSWIFT_R_BN_EXPAND_FAIL);
 850                 goto err;
 851                 }
 852         sw_param.type = SW_ALG_DSA;
 853         sw_param.up.dsa.p.nbytes = BN_bn2bin(dsa->p,
 854                                 (unsigned char *)dsa_p->d);
 855         sw_param.up.dsa.p.value = (unsigned char *)dsa_p->d;
 856         sw_param.up.dsa.q.nbytes = BN_bn2bin(dsa->q,
 857                                 (unsigned char *)dsa_q->d);
 858         sw_param.up.dsa.q.value = (unsigned char *)dsa_q->d;
 859         sw_param.up.dsa.g.nbytes = BN_bn2bin(dsa->g,
 860                                 (unsigned char *)dsa_g->d);
 861         sw_param.up.dsa.g.value = (unsigned char *)dsa_g->d;
 862         sw_param.up.dsa.key.nbytes = BN_bn2bin(dsa->priv_key,
 863                                 (unsigned char *)dsa_key->d);
 864         sw_param.up.dsa.key.value = (unsigned char *)dsa_key->d;
 865         /* Attach the key params */
 866         sw_status = p_CSwift_AttachKeyParam(hac, &sw_param);
 867         switch(sw_status)
 868                 {
 869         case SW_OK:
 870                 break;
 871         case SW_ERR_INPUT_SIZE:
 872                 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_SIGN,CSWIFT_R_BAD_KEY_SIZE);
 873                 goto err;
 874         default:
 875                 {
 876                 char tmpbuf[DECIMAL_SIZE(sw_status)+1];
 877                 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_SIGN,CSWIFT_R_REQUEST_FAILED);
 878                 sprintf(tmpbuf, "%ld", sw_status);
 879                 ERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf);
 880                 }
 881                 goto err;
 882                 }
 883         /* Prepare the argument and response */
 884         arg.nbytes = dlen;
 885         arg.value = (unsigned char *)dgst;
 886         res.nbytes = BN_num_bytes(dsa->p);
 887         memset(result->d, 0, res.nbytes);
 888         res.value = (unsigned char *)result->d;
 889         /* Perform the operation */
 890         sw_status = p_CSwift_SimpleRequest(hac, SW_CMD_DSS_SIGN, &arg, 1,
 891                 &res, 1);
 892         if(sw_status != SW_OK)
 893                 {
 894                 char tmpbuf[DECIMAL_SIZE(sw_status)+1];
 895                 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_SIGN,CSWIFT_R_REQUEST_FAILED);
 896                 sprintf(tmpbuf, "%ld", sw_status);
 897                 ERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf);
 898                 goto err;
 899                 }
 900         /* Convert the response */
 901         if((to_return = DSA_SIG_new()) == NULL)
 902                 goto err;
 903         to_return->r = BN_bin2bn((unsigned char *)result->d, 20, NULL);
 904         to_return->s = BN_bin2bn((unsigned char *)result->d + 20, 20, NULL);
 905
 906 err:
 907         if(acquired)
 908                 release_context(hac);
 909         if(ctx)
 910                 {
 911                 BN_CTX_end(ctx);
 912                 BN_CTX_free(ctx);
 913                 }
 914         return to_return;
 915         }
 916
 917 static int cswift_dsa_verify(const unsigned char *dgst, int dgst_len,
 918                                 DSA_SIG *sig, DSA *dsa)
 919         {
 920         SW_CONTEXT_HANDLE hac;
 921         SW_PARAM sw_param;
 922         SW_STATUS sw_status;
 923         SW_LARGENUMBER arg[2], res;
 924         unsigned long sig_result;
 925         BN_CTX *ctx;
 926         BIGNUM *dsa_p = NULL;
 927         BIGNUM *dsa_q = NULL;
 928         BIGNUM *dsa_g = NULL;
 929         BIGNUM *dsa_key = NULL;
 930         BIGNUM *argument = NULL;
 931         int to_return = -1;
 932         int acquired = 0;
 933
 934         if((ctx = BN_CTX_new()) == NULL)
 935                 goto err;
 936         if(!get_context(&hac))
 937                 {
 938                 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_VERIFY,CSWIFT_R_UNIT_FAILURE);
 939                 goto err;
 940                 }
 941         acquired = 1;
 942         /* Prepare the params */
 943         BN_CTX_start(ctx);
 944         dsa_p = BN_CTX_get(ctx);
 945         dsa_q = BN_CTX_get(ctx);
 946         dsa_g = BN_CTX_get(ctx);
 947         dsa_key = BN_CTX_get(ctx);
 948         argument = BN_CTX_get(ctx);
 949         if(!argument)
 950                 {
 951                 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_VERIFY,CSWIFT_R_BN_CTX_FULL);
 952                 goto err;
 953                 }
 954         if(!bn_wexpand(dsa_p, dsa->p->top) ||
 955                         !bn_wexpand(dsa_q, dsa->q->top) ||
 956                         !bn_wexpand(dsa_g, dsa->g->top) ||
 957                         !bn_wexpand(dsa_key, dsa->pub_key->top) ||
 958                         !bn_wexpand(argument, 40))
 959                 {
 960                 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_VERIFY,CSWIFT_R_BN_EXPAND_FAIL);
 961                 goto err;
 962                 }
 963         sw_param.type = SW_ALG_DSA;
 964         sw_param.up.dsa.p.nbytes = BN_bn2bin(dsa->p,
 965                                 (unsigned char *)dsa_p->d);
 966         sw_param.up.dsa.p.value = (unsigned char *)dsa_p->d;
 967         sw_param.up.dsa.q.nbytes = BN_bn2bin(dsa->q,
 968                                 (unsigned char *)dsa_q->d);
 969         sw_param.up.dsa.q.value = (unsigned char *)dsa_q->d;
 970         sw_param.up.dsa.g.nbytes = BN_bn2bin(dsa->g,
 971                                 (unsigned char *)dsa_g->d);
 972         sw_param.up.dsa.g.value = (unsigned char *)dsa_g->d;
 973         sw_param.up.dsa.key.nbytes = BN_bn2bin(dsa->pub_key,
 974                                 (unsigned char *)dsa_key->d);
 975         sw_param.up.dsa.key.value = (unsigned char *)dsa_key->d;
 976         /* Attach the key params */
 977         sw_status = p_CSwift_AttachKeyParam(hac, &sw_param);
 978         switch(sw_status)
 979                 {
 980         case SW_OK:
 981                 break;
 982         case SW_ERR_INPUT_SIZE:
 983                 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_VERIFY,CSWIFT_R_BAD_KEY_SIZE);
 984                 goto err;
 985         default:
 986                 {
 987                 char tmpbuf[DECIMAL_SIZE(sw_status)+1];
 988                 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_VERIFY,CSWIFT_R_REQUEST_FAILED);
 989                 sprintf(tmpbuf, "%ld", sw_status);
 990                 ERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf);
 991                 }
 992                 goto err;
 993                 }
 994         /* Prepare the argument and response */
 995         arg[0].nbytes = dgst_len;
 996         arg[0].value = (unsigned char *)dgst;
 997         arg[1].nbytes = 40;
 998         arg[1].value = (unsigned char *)argument->d;
 999         memset(arg[1].value, 0, 40);
1000         BN_bn2bin(sig->r, arg[1].value + 20 - BN_num_bytes(sig->r));
1001         BN_bn2bin(sig->s, arg[1].value + 40 - BN_num_bytes(sig->s));
1002         res.nbytes = 4; /* unsigned long */
1003         res.value = (unsigned char *)(&sig_result);
1004         /* Perform the operation */
1005         sw_status = p_CSwift_SimpleRequest(hac, SW_CMD_DSS_VERIFY, arg, 2,
1006                 &res, 1);
1007         if(sw_status != SW_OK)
1008                 {
1009                 char tmpbuf[DECIMAL_SIZE(sw_status)+1];
1010                 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_VERIFY,CSWIFT_R_REQUEST_FAILED);
1011                 sprintf(tmpbuf, "%ld", sw_status);
1012                 ERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf);
1013                 goto err;
1014                 }
1015         /* Convert the response */
1016         to_return = ((sig_result == 0) ? 0 : 1);
1017
1018 err:
1019         if(acquired)
1020                 release_context(hac);
1021         if(ctx)
1022                 {
1023                 BN_CTX_end(ctx);
1024                 BN_CTX_free(ctx);
1025                 }
1026         return to_return;
1027         }
1028 #endif
1029
1030 #ifndef OPENSSL_NO_DH
1031 /* This function is aliased to mod_exp (with the dh and mont dropped). */
1032 static int cswift_mod_exp_dh(const DH *dh, BIGNUM *r,
1033                 const BIGNUM *a, const BIGNUM *p,
1034                 const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx)
1035         {
1036         return cswift_mod_exp(r, a, p, m, ctx);
1037         }
1038 #endif
1039
1040 /* Random bytes are good */
1041 static int cswift_rand_bytes(unsigned char *buf, int num)
1042 {
1043         SW_CONTEXT_HANDLE hac;
1044         SW_STATUS swrc;
1045         SW_LARGENUMBER largenum;
1046         int acquired = 0;
1047         int to_return = 0; /* assume failure */
1048         unsigned char buf32[1024];
1049
1050
1051         if (!get_context(&hac))
1052         {
1053                 CSWIFTerr(CSWIFT_F_CSWIFT_RAND_BYTES, CSWIFT_R_UNIT_FAILURE);
1054                 goto err;
1055         }
1056         acquired = 1;
1057
1058         /************************************************************************/
1059         /* 04/02/2003                                                           */
1060         /* Modified by Frederic Giudicelli (deny-all.com) to overcome the       */
1061         /* limitation of cswift with values not a multiple of 32                */
1062         /************************************************************************/
1063
1064         while(num >= (int)sizeof(buf32))
1065         {
1066                 largenum.value = buf;
1067                 largenum.nbytes = sizeof(buf32);
1068                 /* tell CryptoSwift how many bytes we want and where we want it.
1069                  * Note: - CryptoSwift cannot do more than 4096 bytes at a time.
1070                  *       - CryptoSwift can only do multiple of 32-bits. */
1071                 swrc = p_CSwift_SimpleRequest(hac, SW_CMD_RAND, NULL, 0, &largenum, 1);
1072                 if (swrc != SW_OK)
1073                 {
1074                         char tmpbuf[20];
1075                         CSWIFTerr(CSWIFT_F_CSWIFT_RAND_BYTES, CSWIFT_R_REQUEST_FAILED);
1076                         sprintf(tmpbuf, "%ld", swrc);
1077                         ERR_add_error_data(2, "CryptoSwift error number is ", tmpbuf);
1078                         goto err;
1079                 }
1080                 buf += sizeof(buf32);
1081                 num -= sizeof(buf32);
1082         }
1083         if(num)
1084         {
1085                 largenum.nbytes = sizeof(buf32);
1086                 largenum.value = buf32;
1087                 swrc = p_CSwift_SimpleRequest(hac, SW_CMD_RAND, NULL, 0, &largenum, 1);
1088                 if (swrc != SW_OK)
1089                 {
1090                         char tmpbuf[20];
1091                         CSWIFTerr(CSWIFT_F_CSWIFT_RAND_BYTES, CSWIFT_R_REQUEST_FAILED);
1092                         sprintf(tmpbuf, "%ld", swrc);
1093                         ERR_add_error_data(2, "CryptoSwift error number is ", tmpbuf);
1094                         goto err;
1095                 }
1096                 memcpy(buf, largenum.value, num);
1097         }
1098
1099         to_return = 1;  /* success */
1100 err:
1101         if (acquired)
1102                 release_context(hac);
1103
1104         return to_return;
1105 }
1106
1107 static int cswift_rand_status(void)
1108 {
1109         return 1;
1110 }
1111
1112
1113 /* This stuff is needed if this ENGINE is being compiled into a self-contained
1114  * shared-library. */
1115 #ifndef OPENSSL_NO_DYNAMIC_ENGINE
1116 static int bind_fn(ENGINE *e, const char *id)
1117         {
1118         if(id && (strcmp(id, engine_cswift_id) != 0))
1119                 return 0;
1120         if(!bind_helper(e))
1121                 return 0;
1122         return 1;
1123         }
1124 IMPLEMENT_DYNAMIC_CHECK_FN()
1125 IMPLEMENT_DYNAMIC_BIND_FN(bind_fn)
1126 #endif /* OPENSSL_NO_DYNAMIC_ENGINE */
1127
1128 #endif /* !OPENSSL_NO_HW_CSWIFT */
1129 #endif /* !OPENSSL_NO_HW */