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) 1999-2001 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 <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_destroy(ENGINE *e);
  87 static int cswift_init(ENGINE *e);
  88 static int cswift_finish(ENGINE *e);
  89 static int cswift_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f)());
  90
  91 /* BIGNUM stuff */
  92 static int cswift_mod_exp(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
  93                 const BIGNUM *m, BN_CTX *ctx);
  94 static int cswift_mod_exp_crt(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
  95                 const BIGNUM *q, const BIGNUM *dmp1, const BIGNUM *dmq1,
  96                 const BIGNUM *iqmp, BN_CTX *ctx);
  97
  98 #ifndef OPENSSL_NO_RSA
  99 /* RSA stuff */
 100 static int cswift_rsa_mod_exp(BIGNUM *r0, const BIGNUM *I, RSA *rsa);
 101 #endif
 102 /* This function is aliased to mod_exp (with the mont stuff dropped). */
 103 static int cswift_mod_exp_mont(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
 104                 const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx);
 105
 106 #ifndef OPENSSL_NO_DSA
 107 /* DSA stuff */
 108 static DSA_SIG *cswift_dsa_sign(const unsigned char *dgst, int dlen, DSA *dsa);
 109 static int cswift_dsa_verify(const unsigned char *dgst, int dgst_len,
 110                                 DSA_SIG *sig, DSA *dsa);
 111 #endif
 112
 113 #ifndef OPENSSL_NO_DH
 114 /* DH stuff */
 115 /* This function is alised to mod_exp (with the DH and mont dropped). */
 116 static int cswift_mod_exp_dh(const DH *dh, BIGNUM *r,
 117                 const BIGNUM *a, const BIGNUM *p,
 118                 const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx);
 119 #endif
 120
 121 /* The definitions for control commands specific to this engine */
 122 #define CSWIFT_CMD_SO_PATH              ENGINE_CMD_BASE
 123 static const ENGINE_CMD_DEFN cswift_cmd_defns[] = {
 124         {CSWIFT_CMD_SO_PATH,
 125                 "SO_PATH",
 126                 "Specifies the path to the 'cswift' shared library",
 127                 ENGINE_CMD_FLAG_STRING},
 128         {0, NULL, NULL, 0}
 129         };
 130
 131 #ifndef OPENSSL_NO_RSA
 132 /* Our internal RSA_METHOD that we provide pointers to */
 133 static RSA_METHOD cswift_rsa =
 134         {
 135         "CryptoSwift RSA method",
 136         NULL,
 137         NULL,
 138         NULL,
 139         NULL,
 140         cswift_rsa_mod_exp,
 141         cswift_mod_exp_mont,
 142         NULL,
 143         NULL,
 144         0,
 145         NULL,
 146         NULL,
 147         NULL
 148         };
 149 #endif
 150
 151 #ifndef OPENSSL_NO_DSA
 152 /* Our internal DSA_METHOD that we provide pointers to */
 153 static DSA_METHOD cswift_dsa =
 154         {
 155         "CryptoSwift DSA method",
 156         cswift_dsa_sign,
 157         NULL, /* dsa_sign_setup */
 158         cswift_dsa_verify,
 159         NULL, /* dsa_mod_exp */
 160         NULL, /* bn_mod_exp */
 161         NULL, /* init */
 162         NULL, /* finish */
 163         0, /* flags */
 164         NULL /* app_data */
 165         };
 166 #endif
 167
 168 #ifndef OPENSSL_NO_DH
 169 /* Our internal DH_METHOD that we provide pointers to */
 170 static DH_METHOD cswift_dh =
 171         {
 172         "CryptoSwift DH method",
 173         NULL,
 174         NULL,
 175         cswift_mod_exp_dh,
 176         NULL,
 177         NULL,
 178         0,
 179         NULL
 180         };
 181 #endif
 182
 183 #ifndef OPENSSL_NO_ERR
 184 /* Error function codes for use in cswift operation */
 185 #define CSWIFT_F_CSWIFT_INIT                    100
 186 #define CSWIFT_F_CSWIFT_FINISH                  101
 187 #define CSWIFT_F_CSWIFT_CTRL                    102
 188 #define CSWIFT_F_CSWIFT_MOD_EXP                 103
 189 #define CSWIFT_F_CSWIFT_MOD_EXP_CRT             104
 190 #define CSWIFT_F_CSWIFT_RSA_MOD_EXP             105
 191 #define CSWIFT_F_CSWIFT_DSA_SIGN                106
 192 #define CSWIFT_F_CSWIFT_DSA_VERIFY              107
 193 /* Error reason codes */
 194 #define CSWIFT_R_ALREADY_LOADED                 108
 195 #define CSWIFT_R_NOT_LOADED                     109
 196 #define CSWIFT_R_UNIT_FAILURE                   110
 197 #define CSWIFT_R_CTRL_COMMAND_NOT_IMPLEMENTED   113
 198 #define CSWIFT_R_BN_CTX_FULL                    115
 199 #define CSWIFT_R_BN_EXPAND_FAIL                 116
 200 #define CSWIFT_R_BAD_KEY_SIZE                   117
 201 #define CSWIFT_R_REQUEST_FAILED                 118
 202 #define CSWIFT_R_MISSING_KEY_COMPONENTS         120
 203 static ERR_STRING_DATA cswift_str_functs[] =
 204         {
 205         /* This first element is changed to match the dynamic 'lib' number */
 206 {ERR_PACK(0,0,0),                               "cswift engine code"},
 207 {ERR_PACK(0,CSWIFT_F_CSWIFT_INIT,0),            "cswift_init"},
 208 {ERR_PACK(0,CSWIFT_F_CSWIFT_FINISH,0),          "cswift_finish"},
 209 {ERR_PACK(0,CSWIFT_F_CSWIFT_CTRL,0),            "cswift_ctrl"},
 210 {ERR_PACK(0,CSWIFT_F_CSWIFT_MOD_EXP,0),         "cswift_mod_exp"},
 211 {ERR_PACK(0,CSWIFT_F_CSWIFT_MOD_EXP_CRT,0),     "cswift_mod_exp_crt"},
 212 {ERR_PACK(0,CSWIFT_F_CSWIFT_RSA_MOD_EXP,0),     "cswift_rsa_mod_exp"},
 213 {ERR_PACK(0,CSWIFT_F_CSWIFT_DSA_SIGN,0),        "cswift_dsa_sign"},
 214 {ERR_PACK(0,CSWIFT_F_CSWIFT_DSA_VERIFY,0),      "cswift_dsa_verify"},
 215 /* Error reason codes */
 216 {CSWIFT_R_ALREADY_LOADED                 ,"already loaded"},
 217 {CSWIFT_R_NOT_LOADED                     ,"not loaded"},
 218 {CSWIFT_R_UNIT_FAILURE                   ,"unit failure"},
 219 {CSWIFT_R_CTRL_COMMAND_NOT_IMPLEMENTED   ,"ctrl command not implemented"},
 220 {CSWIFT_R_BN_CTX_FULL                    ,"BN_CTX full"},
 221 {CSWIFT_R_BN_EXPAND_FAIL                 ,"bn_expand fail"},
 222 {CSWIFT_R_BAD_KEY_SIZE                   ,"bad key size"},
 223 {CSWIFT_R_REQUEST_FAILED                 ,"request failed"},
 224 {CSWIFT_R_MISSING_KEY_COMPONENTS         ,"missing key components"},
 225 {0,NULL}
 226         };
 227 /* The library number we obtain dynamically from the ERR code */
 228 static int cswift_err_lib = -1;
 229 #define CSWIFTerr(f,r) ERR_PUT_error(cswift_err_lib,(f),(r),__FILE__,__LINE__)
 230 static void cswift_load_error_strings(void)
 231         {
 232         if(cswift_err_lib < 0)
 233                 {
 234                 if((cswift_err_lib = ERR_get_next_error_library()) <= 0)
 235                         return;
 236                 cswift_str_functs[0].error = ERR_PACK(cswift_err_lib,0,0);
 237                 ERR_load_strings(cswift_err_lib, cswift_str_functs);
 238                 }
 239         }
 240 static void cswift_unload_error_strings(void)
 241         {
 242         if(cswift_err_lib >= 0)
 243                 {
 244                 ERR_unload_strings(cswift_err_lib, cswift_str_functs);
 245                 cswift_err_lib = -1;
 246                 }
 247         }
 248 #else
 249 #define CSWIFTerr(f,r)                                  /* NOP */
 250 static void cswift_load_error_strings(void) { }         /* NOP */
 251 static void cswift_unload_error_strings(void) { }       /* NOP */
 252 #endif
 253
 254 /* Constants used when creating the ENGINE */
 255 static const char *engine_cswift_id = "cswift";
 256 static const char *engine_cswift_name = "CryptoSwift hardware engine support";
 257
 258 /* This internal function is used by ENGINE_cswift() and possibly by the
 259  * "dynamic" ENGINE support too */
 260 static int bind_helper(ENGINE *e)
 261         {
 262 #ifndef OPENSSL_NO_RSA
 263         const RSA_METHOD *meth1;
 264 #endif
 265 #ifndef OPENSSL_NO_DH
 266         const DH_METHOD *meth2;
 267 #endif
 268         if(!ENGINE_set_id(e, engine_cswift_id) ||
 269                         !ENGINE_set_name(e, engine_cswift_name) ||
 270 #ifndef OPENSSL_NO_RSA
 271                         !ENGINE_set_RSA(e, &cswift_rsa) ||
 272 #endif
 273 #ifndef OPENSSL_NO_DSA
 274                         !ENGINE_set_DSA(e, &cswift_dsa) ||
 275 #endif
 276 #ifndef OPENSSL_NO_DH
 277                         !ENGINE_set_DH(e, &cswift_dh) ||
 278 #endif
 279                         !ENGINE_set_destroy_function(e, cswift_destroy) ||
 280                         !ENGINE_set_init_function(e, cswift_init) ||
 281                         !ENGINE_set_finish_function(e, cswift_finish) ||
 282                         !ENGINE_set_ctrl_function(e, cswift_ctrl) ||
 283                         !ENGINE_set_cmd_defns(e, cswift_cmd_defns))
 284                 return 0;
 285
 286 #ifndef OPENSSL_NO_RSA
 287         /* We know that the "PKCS1_SSLeay()" functions hook properly
 288          * to the cswift-specific mod_exp and mod_exp_crt so we use
 289          * those functions. NB: We don't use ENGINE_openssl() or
 290          * anything "more generic" because something like the RSAref
 291          * code may not hook properly, and if you own one of these
 292          * cards then you have the right to do RSA operations on it
 293          * anyway! */
 294         meth1 = RSA_PKCS1_SSLeay();
 295         cswift_rsa.rsa_pub_enc = meth1->rsa_pub_enc;
 296         cswift_rsa.rsa_pub_dec = meth1->rsa_pub_dec;
 297         cswift_rsa.rsa_priv_enc = meth1->rsa_priv_enc;
 298         cswift_rsa.rsa_priv_dec = meth1->rsa_priv_dec;
 299 #endif
 300
 301 #ifndef OPENSSL_NO_DH
 302         /* Much the same for Diffie-Hellman */
 303         meth2 = DH_OpenSSL();
 304         cswift_dh.generate_key = meth2->generate_key;
 305         cswift_dh.compute_key = meth2->compute_key;
 306 #endif
 307
 308         /* Ensure the cswift error handling is set up */
 309         cswift_load_error_strings();
 310         return 1;
 311         }
 312
 313 static ENGINE *engine_cswift(void)
 314         {
 315         ENGINE *ret = ENGINE_new();
 316         if(!ret)
 317                 return NULL;
 318         if(!bind_helper(ret))
 319                 {
 320                 ENGINE_free(ret);
 321                 return NULL;
 322                 }
 323         return ret;
 324         }
 325
 326 void ENGINE_load_cswift(void)
 327         {
 328         /* Copied from eng_[openssl|dyn].c */
 329         ENGINE *toadd = engine_cswift();
 330         if(!toadd) return;
 331         ENGINE_add(toadd);
 332         ENGINE_free(toadd);
 333         ERR_clear_error();
 334         }
 335
 336 /* This is a process-global DSO handle used for loading and unloading
 337  * the CryptoSwift library. NB: This is only set (or unset) during an
 338  * init() or finish() call (reference counts permitting) and they're
 339  * operating with global locks, so this should be thread-safe
 340  * implicitly. */
 341 static DSO *cswift_dso = NULL;
 342
 343 /* These are the function pointers that are (un)set when the library has
 344  * successfully (un)loaded. */
 345 t_swAcquireAccContext *p_CSwift_AcquireAccContext = NULL;
 346 t_swAttachKeyParam *p_CSwift_AttachKeyParam = NULL;
 347 t_swSimpleRequest *p_CSwift_SimpleRequest = NULL;
 348 t_swReleaseAccContext *p_CSwift_ReleaseAccContext = NULL;
 349
 350 /* Used in the DSO operations. */
 351 static const char def_CSWIFT_LIBNAME[] = "swift";
 352 static const char *CSWIFT_LIBNAME = def_CSWIFT_LIBNAME;
 353 static const char *CSWIFT_F1 = "swAcquireAccContext";
 354 static const char *CSWIFT_F2 = "swAttachKeyParam";
 355 static const char *CSWIFT_F3 = "swSimpleRequest";
 356 static const char *CSWIFT_F4 = "swReleaseAccContext";
 357
 358
 359 /* CryptoSwift library functions and mechanics - these are used by the
 360  * higher-level functions further down. NB: As and where there's no
 361  * error checking, take a look lower down where these functions are
 362  * called, the checking and error handling is probably down there. */
 363
 364 /* utility function to obtain a context */
 365 static int get_context(SW_CONTEXT_HANDLE *hac)
 366         {
 367         SW_STATUS status;
 368
 369         status = p_CSwift_AcquireAccContext(hac);
 370         if(status != SW_OK)
 371                 return 0;
 372         return 1;
 373         }
 374
 375 /* similarly to release one. */
 376 static void release_context(SW_CONTEXT_HANDLE hac)
 377         {
 378         p_CSwift_ReleaseAccContext(hac);
 379         }
 380
 381 /* Destructor (complements the "ENGINE_cswift()" constructor) */
 382 static int cswift_destroy(ENGINE *e)
 383         {
 384         cswift_unload_error_strings();
 385         return 1;
 386         }
 387
 388 /* (de)initialisation functions. */
 389 static int cswift_init(ENGINE *e)
 390         {
 391         SW_CONTEXT_HANDLE hac;
 392         t_swAcquireAccContext *p1;
 393         t_swAttachKeyParam *p2;
 394         t_swSimpleRequest *p3;
 395         t_swReleaseAccContext *p4;
 396
 397         if(cswift_dso != NULL)
 398                 {
 399                 CSWIFTerr(CSWIFT_F_CSWIFT_INIT,CSWIFT_R_ALREADY_LOADED);
 400                 goto err;
 401                 }
 402         /* Attempt to load libswift.so/swift.dll/whatever. */
 403         cswift_dso = DSO_load(NULL, CSWIFT_LIBNAME, NULL, 0);
 404         if(cswift_dso == NULL)
 405                 {
 406                 CSWIFTerr(CSWIFT_F_CSWIFT_INIT,CSWIFT_R_NOT_LOADED);
 407                 goto err;
 408                 }
 409         if(!(p1 = (t_swAcquireAccContext *)
 410                                 DSO_bind_func(cswift_dso, CSWIFT_F1)) ||
 411                         !(p2 = (t_swAttachKeyParam *)
 412                                 DSO_bind_func(cswift_dso, CSWIFT_F2)) ||
 413                         !(p3 = (t_swSimpleRequest *)
 414                                 DSO_bind_func(cswift_dso, CSWIFT_F3)) ||
 415                         !(p4 = (t_swReleaseAccContext *)
 416                                 DSO_bind_func(cswift_dso, CSWIFT_F4)))
 417                 {
 418                 CSWIFTerr(CSWIFT_F_CSWIFT_INIT,CSWIFT_R_NOT_LOADED);
 419                 goto err;
 420                 }
 421         /* Copy the pointers */
 422         p_CSwift_AcquireAccContext = p1;
 423         p_CSwift_AttachKeyParam = p2;
 424         p_CSwift_SimpleRequest = p3;
 425         p_CSwift_ReleaseAccContext = p4;
 426         /* Try and get a context - if not, we may have a DSO but no
 427          * accelerator! */
 428         if(!get_context(&hac))
 429                 {
 430                 CSWIFTerr(CSWIFT_F_CSWIFT_INIT,CSWIFT_R_UNIT_FAILURE);
 431                 goto err;
 432                 }
 433         release_context(hac);
 434         /* Everything's fine. */
 435         return 1;
 436 err:
 437         if(cswift_dso)
 438                 DSO_free(cswift_dso);
 439         p_CSwift_AcquireAccContext = NULL;
 440         p_CSwift_AttachKeyParam = NULL;
 441         p_CSwift_SimpleRequest = NULL;
 442         p_CSwift_ReleaseAccContext = NULL;
 443         return 0;
 444         }
 445
 446 static int cswift_finish(ENGINE *e)
 447         {
 448         if(cswift_dso == NULL)
 449                 {
 450                 CSWIFTerr(CSWIFT_F_CSWIFT_FINISH,CSWIFT_R_NOT_LOADED);
 451                 return 0;
 452                 }
 453         if(!DSO_free(cswift_dso))
 454                 {
 455                 CSWIFTerr(CSWIFT_F_CSWIFT_FINISH,CSWIFT_R_UNIT_FAILURE);
 456                 return 0;
 457                 }
 458         cswift_dso = NULL;
 459         p_CSwift_AcquireAccContext = NULL;
 460         p_CSwift_AttachKeyParam = NULL;
 461         p_CSwift_SimpleRequest = NULL;
 462         p_CSwift_ReleaseAccContext = NULL;
 463         return 1;
 464         }
 465
 466 static int cswift_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f)())
 467         {
 468         int initialised = ((cswift_dso == NULL) ? 0 : 1);
 469         switch(cmd)
 470                 {
 471         case CSWIFT_CMD_SO_PATH:
 472                 if(p == NULL)
 473                         {
 474                         CSWIFTerr(CSWIFT_F_CSWIFT_CTRL,ERR_R_PASSED_NULL_PARAMETER);
 475                         return 0;
 476                         }
 477                 if(initialised)
 478                         {
 479                         CSWIFTerr(CSWIFT_F_CSWIFT_CTRL,CSWIFT_R_ALREADY_LOADED);
 480                         return 0;
 481                         }
 482                 CSWIFT_LIBNAME = (const char *)p;
 483                 return 1;
 484         default:
 485                 break;
 486                 }
 487         CSWIFTerr(CSWIFT_F_CSWIFT_CTRL,CSWIFT_R_CTRL_COMMAND_NOT_IMPLEMENTED);
 488         return 0;
 489         }
 490
 491 /* Un petit mod_exp */
 492 static int cswift_mod_exp(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
 493                         const BIGNUM *m, BN_CTX *ctx)
 494         {
 495         /* I need somewhere to store temporary serialised values for
 496          * use with the CryptoSwift API calls. A neat cheat - I'll use
 497          * BIGNUMs from the BN_CTX but access their arrays directly as
 498          * byte arrays <grin>. This way I don't have to clean anything
 499          * up. */
 500         BIGNUM *modulus;
 501         BIGNUM *exponent;
 502         BIGNUM *argument;
 503         BIGNUM *result;
 504         SW_STATUS sw_status;
 505         SW_LARGENUMBER arg, res;
 506         SW_PARAM sw_param;
 507         SW_CONTEXT_HANDLE hac;
 508         int to_return, acquired;
 509
 510         modulus = exponent = argument = result = NULL;
 511         to_return = 0; /* expect failure */
 512         acquired = 0;
 513
 514         if(!get_context(&hac))
 515                 {
 516                 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP,CSWIFT_R_UNIT_FAILURE);
 517                 goto err;
 518                 }
 519         acquired = 1;
 520         /* Prepare the params */
 521         BN_CTX_start(ctx);
 522         modulus = BN_CTX_get(ctx);
 523         exponent = BN_CTX_get(ctx);
 524         argument = BN_CTX_get(ctx);
 525         result = BN_CTX_get(ctx);
 526         if(!result)
 527                 {
 528                 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP,CSWIFT_R_BN_CTX_FULL);
 529                 goto err;
 530                 }
 531         if(!bn_wexpand(modulus, m->top) || !bn_wexpand(exponent, p->top) ||
 532                 !bn_wexpand(argument, a->top) || !bn_wexpand(result, m->top))
 533                 {
 534                 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP,CSWIFT_R_BN_EXPAND_FAIL);
 535                 goto err;
 536                 }
 537         sw_param.type = SW_ALG_EXP;
 538         sw_param.up.exp.modulus.nbytes = BN_bn2bin(m,
 539                 (unsigned char *)modulus->d);
 540         sw_param.up.exp.modulus.value = (unsigned char *)modulus->d;
 541         sw_param.up.exp.exponent.nbytes = BN_bn2bin(p,
 542                 (unsigned char *)exponent->d);
 543         sw_param.up.exp.exponent.value = (unsigned char *)exponent->d;
 544         /* Attach the key params */
 545         sw_status = p_CSwift_AttachKeyParam(hac, &sw_param);
 546         switch(sw_status)
 547                 {
 548         case SW_OK:
 549                 break;
 550         case SW_ERR_INPUT_SIZE:
 551                 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP,CSWIFT_R_BAD_KEY_SIZE);
 552                 goto err;
 553         default:
 554                 {
 555                 char tmpbuf[20];
 556                 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP,CSWIFT_R_REQUEST_FAILED);
 557                 sprintf(tmpbuf, "%ld", sw_status);
 558                 ERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf);
 559                 }
 560                 goto err;
 561                 }
 562         /* Prepare the argument and response */
 563         arg.nbytes = BN_bn2bin(a, (unsigned char *)argument->d);
 564         arg.value = (unsigned char *)argument->d;
 565         res.nbytes = BN_num_bytes(m);
 566         memset(result->d, 0, res.nbytes);
 567         res.value = (unsigned char *)result->d;
 568         /* Perform the operation */
 569         if((sw_status = p_CSwift_SimpleRequest(hac, SW_CMD_MODEXP, &arg, 1,
 570                 &res, 1)) != SW_OK)
 571                 {
 572                 char tmpbuf[20];
 573                 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP,CSWIFT_R_REQUEST_FAILED);
 574                 sprintf(tmpbuf, "%ld", sw_status);
 575                 ERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf);
 576                 goto err;
 577                 }
 578         /* Convert the response */
 579         BN_bin2bn((unsigned char *)result->d, res.nbytes, r);
 580         to_return = 1;
 581 err:
 582         if(acquired)
 583                 release_context(hac);
 584         BN_CTX_end(ctx);
 585         return to_return;
 586         }
 587
 588 /* Un petit mod_exp chinois */
 589 static int cswift_mod_exp_crt(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
 590                         const BIGNUM *q, const BIGNUM *dmp1,
 591                         const BIGNUM *dmq1, const BIGNUM *iqmp, BN_CTX *ctx)
 592         {
 593         SW_STATUS sw_status;
 594         SW_LARGENUMBER arg, res;
 595         SW_PARAM sw_param;
 596         SW_CONTEXT_HANDLE hac;
 597         BIGNUM *rsa_p = NULL;
 598         BIGNUM *rsa_q = NULL;
 599         BIGNUM *rsa_dmp1 = NULL;
 600         BIGNUM *rsa_dmq1 = NULL;
 601         BIGNUM *rsa_iqmp = NULL;
 602         BIGNUM *argument = NULL;
 603         BIGNUM *result = NULL;
 604         int to_return = 0; /* expect failure */
 605         int acquired = 0;
 606
 607         if(!get_context(&hac))
 608                 {
 609                 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP_CRT,CSWIFT_R_UNIT_FAILURE);
 610                 goto err;
 611                 }
 612         acquired = 1;
 613         /* Prepare the params */
 614         BN_CTX_start(ctx);
 615         rsa_p = BN_CTX_get(ctx);
 616         rsa_q = BN_CTX_get(ctx);
 617         rsa_dmp1 = BN_CTX_get(ctx);
 618         rsa_dmq1 = BN_CTX_get(ctx);
 619         rsa_iqmp = BN_CTX_get(ctx);
 620         argument = BN_CTX_get(ctx);
 621         result = BN_CTX_get(ctx);
 622         if(!result)
 623                 {
 624                 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP_CRT,CSWIFT_R_BN_CTX_FULL);
 625                 goto err;
 626                 }
 627         if(!bn_wexpand(rsa_p, p->top) || !bn_wexpand(rsa_q, q->top) ||
 628                         !bn_wexpand(rsa_dmp1, dmp1->top) ||
 629                         !bn_wexpand(rsa_dmq1, dmq1->top) ||
 630                         !bn_wexpand(rsa_iqmp, iqmp->top) ||
 631                         !bn_wexpand(argument, a->top) ||
 632                         !bn_wexpand(result, p->top + q->top))
 633                 {
 634                 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP_CRT,CSWIFT_R_BN_EXPAND_FAIL);
 635                 goto err;
 636                 }
 637         sw_param.type = SW_ALG_CRT;
 638         sw_param.up.crt.p.nbytes = BN_bn2bin(p, (unsigned char *)rsa_p->d);
 639         sw_param.up.crt.p.value = (unsigned char *)rsa_p->d;
 640         sw_param.up.crt.q.nbytes = BN_bn2bin(q, (unsigned char *)rsa_q->d);
 641         sw_param.up.crt.q.value = (unsigned char *)rsa_q->d;
 642         sw_param.up.crt.dmp1.nbytes = BN_bn2bin(dmp1,
 643                 (unsigned char *)rsa_dmp1->d);
 644         sw_param.up.crt.dmp1.value = (unsigned char *)rsa_dmp1->d;
 645         sw_param.up.crt.dmq1.nbytes = BN_bn2bin(dmq1,
 646                 (unsigned char *)rsa_dmq1->d);
 647         sw_param.up.crt.dmq1.value = (unsigned char *)rsa_dmq1->d;
 648         sw_param.up.crt.iqmp.nbytes = BN_bn2bin(iqmp,
 649                 (unsigned char *)rsa_iqmp->d);
 650         sw_param.up.crt.iqmp.value = (unsigned char *)rsa_iqmp->d;
 651         /* Attach the key params */
 652         sw_status = p_CSwift_AttachKeyParam(hac, &sw_param);
 653         switch(sw_status)
 654                 {
 655         case SW_OK:
 656                 break;
 657         case SW_ERR_INPUT_SIZE:
 658                 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP_CRT,CSWIFT_R_BAD_KEY_SIZE);
 659                 goto err;
 660         default:
 661                 {
 662                 char tmpbuf[20];
 663                 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP_CRT,CSWIFT_R_REQUEST_FAILED);
 664                 sprintf(tmpbuf, "%ld", sw_status);
 665                 ERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf);
 666                 }
 667                 goto err;
 668                 }
 669         /* Prepare the argument and response */
 670         arg.nbytes = BN_bn2bin(a, (unsigned char *)argument->d);
 671         arg.value = (unsigned char *)argument->d;
 672         res.nbytes = 2 * BN_num_bytes(p);
 673         memset(result->d, 0, res.nbytes);
 674         res.value = (unsigned char *)result->d;
 675         /* Perform the operation */
 676         if((sw_status = p_CSwift_SimpleRequest(hac, SW_CMD_MODEXP_CRT, &arg, 1,
 677                 &res, 1)) != SW_OK)
 678                 {
 679                 char tmpbuf[20];
 680                 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP_CRT,CSWIFT_R_REQUEST_FAILED);
 681                 sprintf(tmpbuf, "%ld", sw_status);
 682                 ERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf);
 683                 goto err;
 684                 }
 685         /* Convert the response */
 686         BN_bin2bn((unsigned char *)result->d, res.nbytes, r);
 687         to_return = 1;
 688 err:
 689         if(acquired)
 690                 release_context(hac);
 691         BN_CTX_end(ctx);
 692         return to_return;
 693         }
 694
 695 #ifndef OPENSSL_NO_RSA
 696 static int cswift_rsa_mod_exp(BIGNUM *r0, const BIGNUM *I, RSA *rsa)
 697         {
 698         BN_CTX *ctx;
 699         int to_return = 0;
 700
 701         if((ctx = BN_CTX_new()) == NULL)
 702                 goto err;
 703         if(!rsa->p || !rsa->q || !rsa->dmp1 || !rsa->dmq1 || !rsa->iqmp)
 704                 {
 705                 CSWIFTerr(CSWIFT_F_CSWIFT_RSA_MOD_EXP,CSWIFT_R_MISSING_KEY_COMPONENTS);
 706                 goto err;
 707                 }
 708         to_return = cswift_mod_exp_crt(r0, I, rsa->p, rsa->q, rsa->dmp1,
 709                 rsa->dmq1, rsa->iqmp, ctx);
 710 err:
 711         if(ctx)
 712                 BN_CTX_free(ctx);
 713         return to_return;
 714         }
 715 #endif
 716
 717 /* This function is aliased to mod_exp (with the mont stuff dropped). */
 718 static int cswift_mod_exp_mont(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
 719                 const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx)
 720         {
 721         return cswift_mod_exp(r, a, p, m, ctx);
 722         }
 723
 724 #ifndef OPENSSL_NO_DSA
 725 static DSA_SIG *cswift_dsa_sign(const unsigned char *dgst, int dlen, DSA *dsa)
 726         {
 727         SW_CONTEXT_HANDLE hac;
 728         SW_PARAM sw_param;
 729         SW_STATUS sw_status;
 730         SW_LARGENUMBER arg, res;
 731         unsigned char *ptr;
 732         BN_CTX *ctx;
 733         BIGNUM *dsa_p = NULL;
 734         BIGNUM *dsa_q = NULL;
 735         BIGNUM *dsa_g = NULL;
 736         BIGNUM *dsa_key = NULL;
 737         BIGNUM *result = NULL;
 738         DSA_SIG *to_return = NULL;
 739         int acquired = 0;
 740
 741         if((ctx = BN_CTX_new()) == NULL)
 742                 goto err;
 743         if(!get_context(&hac))
 744                 {
 745                 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_SIGN,CSWIFT_R_UNIT_FAILURE);
 746                 goto err;
 747                 }
 748         acquired = 1;
 749         /* Prepare the params */
 750         BN_CTX_start(ctx);
 751         dsa_p = BN_CTX_get(ctx);
 752         dsa_q = BN_CTX_get(ctx);
 753         dsa_g = BN_CTX_get(ctx);
 754         dsa_key = BN_CTX_get(ctx);
 755         result = BN_CTX_get(ctx);
 756         if(!result)
 757                 {
 758                 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_SIGN,CSWIFT_R_BN_CTX_FULL);
 759                 goto err;
 760                 }
 761         if(!bn_wexpand(dsa_p, dsa->p->top) ||
 762                         !bn_wexpand(dsa_q, dsa->q->top) ||
 763                         !bn_wexpand(dsa_g, dsa->g->top) ||
 764                         !bn_wexpand(dsa_key, dsa->priv_key->top) ||
 765                         !bn_wexpand(result, dsa->p->top))
 766                 {
 767                 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_SIGN,CSWIFT_R_BN_EXPAND_FAIL);
 768                 goto err;
 769                 }
 770         sw_param.type = SW_ALG_DSA;
 771         sw_param.up.dsa.p.nbytes = BN_bn2bin(dsa->p,
 772                                 (unsigned char *)dsa_p->d);
 773         sw_param.up.dsa.p.value = (unsigned char *)dsa_p->d;
 774         sw_param.up.dsa.q.nbytes = BN_bn2bin(dsa->q,
 775                                 (unsigned char *)dsa_q->d);
 776         sw_param.up.dsa.q.value = (unsigned char *)dsa_q->d;
 777         sw_param.up.dsa.g.nbytes = BN_bn2bin(dsa->g,
 778                                 (unsigned char *)dsa_g->d);
 779         sw_param.up.dsa.g.value = (unsigned char *)dsa_g->d;
 780         sw_param.up.dsa.key.nbytes = BN_bn2bin(dsa->priv_key,
 781                                 (unsigned char *)dsa_key->d);
 782         sw_param.up.dsa.key.value = (unsigned char *)dsa_key->d;
 783         /* Attach the key params */
 784         sw_status = p_CSwift_AttachKeyParam(hac, &sw_param);
 785         switch(sw_status)
 786                 {
 787         case SW_OK:
 788                 break;
 789         case SW_ERR_INPUT_SIZE:
 790                 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_SIGN,CSWIFT_R_BAD_KEY_SIZE);
 791                 goto err;
 792         default:
 793                 {
 794                 char tmpbuf[20];
 795                 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_SIGN,CSWIFT_R_REQUEST_FAILED);
 796                 sprintf(tmpbuf, "%ld", sw_status);
 797                 ERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf);
 798                 }
 799                 goto err;
 800                 }
 801         /* Prepare the argument and response */
 802         arg.nbytes = dlen;
 803         arg.value = (unsigned char *)dgst;
 804         res.nbytes = BN_num_bytes(dsa->p);
 805         memset(result->d, 0, res.nbytes);
 806         res.value = (unsigned char *)result->d;
 807         /* Perform the operation */
 808         sw_status = p_CSwift_SimpleRequest(hac, SW_CMD_DSS_SIGN, &arg, 1,
 809                 &res, 1);
 810         if(sw_status != SW_OK)
 811                 {
 812                 char tmpbuf[20];
 813                 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_SIGN,CSWIFT_R_REQUEST_FAILED);
 814                 sprintf(tmpbuf, "%ld", sw_status);
 815                 ERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf);
 816                 goto err;
 817                 }
 818         /* Convert the response */
 819         ptr = (unsigned char *)result->d;
 820         if((to_return = DSA_SIG_new()) == NULL)
 821                 goto err;
 822         to_return->r = BN_bin2bn((unsigned char *)result->d, 20, NULL);
 823         to_return->s = BN_bin2bn((unsigned char *)result->d + 20, 20, NULL);
 824
 825 err:
 826         if(acquired)
 827                 release_context(hac);
 828         if(ctx)
 829                 {
 830                 BN_CTX_end(ctx);
 831                 BN_CTX_free(ctx);
 832                 }
 833         return to_return;
 834         }
 835
 836 static int cswift_dsa_verify(const unsigned char *dgst, int dgst_len,
 837                                 DSA_SIG *sig, DSA *dsa)
 838         {
 839         SW_CONTEXT_HANDLE hac;
 840         SW_PARAM sw_param;
 841         SW_STATUS sw_status;
 842         SW_LARGENUMBER arg[2], res;
 843         unsigned long sig_result;
 844         BN_CTX *ctx;
 845         BIGNUM *dsa_p = NULL;
 846         BIGNUM *dsa_q = NULL;
 847         BIGNUM *dsa_g = NULL;
 848         BIGNUM *dsa_key = NULL;
 849         BIGNUM *argument = NULL;
 850         int to_return = -1;
 851         int acquired = 0;
 852
 853         if((ctx = BN_CTX_new()) == NULL)
 854                 goto err;
 855         if(!get_context(&hac))
 856                 {
 857                 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_VERIFY,CSWIFT_R_UNIT_FAILURE);
 858                 goto err;
 859                 }
 860         acquired = 1;
 861         /* Prepare the params */
 862         BN_CTX_start(ctx);
 863         dsa_p = BN_CTX_get(ctx);
 864         dsa_q = BN_CTX_get(ctx);
 865         dsa_g = BN_CTX_get(ctx);
 866         dsa_key = BN_CTX_get(ctx);
 867         argument = BN_CTX_get(ctx);
 868         if(!argument)
 869                 {
 870                 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_VERIFY,CSWIFT_R_BN_CTX_FULL);
 871                 goto err;
 872                 }
 873         if(!bn_wexpand(dsa_p, dsa->p->top) ||
 874                         !bn_wexpand(dsa_q, dsa->q->top) ||
 875                         !bn_wexpand(dsa_g, dsa->g->top) ||
 876                         !bn_wexpand(dsa_key, dsa->pub_key->top) ||
 877                         !bn_wexpand(argument, 40))
 878                 {
 879                 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_VERIFY,CSWIFT_R_BN_EXPAND_FAIL);
 880                 goto err;
 881                 }
 882         sw_param.type = SW_ALG_DSA;
 883         sw_param.up.dsa.p.nbytes = BN_bn2bin(dsa->p,
 884                                 (unsigned char *)dsa_p->d);
 885         sw_param.up.dsa.p.value = (unsigned char *)dsa_p->d;
 886         sw_param.up.dsa.q.nbytes = BN_bn2bin(dsa->q,
 887                                 (unsigned char *)dsa_q->d);
 888         sw_param.up.dsa.q.value = (unsigned char *)dsa_q->d;
 889         sw_param.up.dsa.g.nbytes = BN_bn2bin(dsa->g,
 890                                 (unsigned char *)dsa_g->d);
 891         sw_param.up.dsa.g.value = (unsigned char *)dsa_g->d;
 892         sw_param.up.dsa.key.nbytes = BN_bn2bin(dsa->pub_key,
 893                                 (unsigned char *)dsa_key->d);
 894         sw_param.up.dsa.key.value = (unsigned char *)dsa_key->d;
 895         /* Attach the key params */
 896         sw_status = p_CSwift_AttachKeyParam(hac, &sw_param);
 897         switch(sw_status)
 898                 {
 899         case SW_OK:
 900                 break;
 901         case SW_ERR_INPUT_SIZE:
 902                 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_VERIFY,CSWIFT_R_BAD_KEY_SIZE);
 903                 goto err;
 904         default:
 905                 {
 906                 char tmpbuf[20];
 907                 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_VERIFY,CSWIFT_R_REQUEST_FAILED);
 908                 sprintf(tmpbuf, "%ld", sw_status);
 909                 ERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf);
 910                 }
 911                 goto err;
 912                 }
 913         /* Prepare the argument and response */
 914         arg[0].nbytes = dgst_len;
 915         arg[0].value = (unsigned char *)dgst;
 916         arg[1].nbytes = 40;
 917         arg[1].value = (unsigned char *)argument->d;
 918         memset(arg[1].value, 0, 40);
 919         BN_bn2bin(sig->r, arg[1].value + 20 - BN_num_bytes(sig->r));
 920         BN_bn2bin(sig->s, arg[1].value + 40 - BN_num_bytes(sig->s));
 921         res.nbytes = 4; /* unsigned long */
 922         res.value = (unsigned char *)(&sig_result);
 923         /* Perform the operation */
 924         sw_status = p_CSwift_SimpleRequest(hac, SW_CMD_DSS_VERIFY, arg, 2,
 925                 &res, 1);
 926         if(sw_status != SW_OK)
 927                 {
 928                 char tmpbuf[20];
 929                 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_VERIFY,CSWIFT_R_REQUEST_FAILED);
 930                 sprintf(tmpbuf, "%ld", sw_status);
 931                 ERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf);
 932                 goto err;
 933                 }
 934         /* Convert the response */
 935         to_return = ((sig_result == 0) ? 0 : 1);
 936
 937 err:
 938         if(acquired)
 939                 release_context(hac);
 940         if(ctx)
 941                 {
 942                 BN_CTX_end(ctx);
 943                 BN_CTX_free(ctx);
 944                 }
 945         return to_return;
 946         }
 947 #endif
 948
 949 #ifndef OPENSSL_NO_DH
 950 /* This function is aliased to mod_exp (with the dh and mont dropped). */
 951 static int cswift_mod_exp_dh(const DH *dh, BIGNUM *r,
 952                 const BIGNUM *a, const BIGNUM *p,
 953                 const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx)
 954         {
 955         return cswift_mod_exp(r, a, p, m, ctx);
 956         }
 957 #endif
 958
 959 /* This stuff is needed if this ENGINE is being compiled into a self-contained
 960  * shared-library. */
 961 #ifdef ENGINE_DYNAMIC_SUPPORT
 962 static int bind_fn(ENGINE *e, const char *id)
 963         {
 964         if(id && (strcmp(id, engine_cswift_id) != 0))
 965                 return 0;
 966         if(!bind_helper(e))
 967                 return 0;
 968         return 1;
 969         }
 970 IMPLEMENT_DYNAMIC_CHECK_FN()
 971 IMPLEMENT_DYNAMIC_BIND_FN(bind_fn)
 972 #endif /* ENGINE_DYNAMIC_SUPPORT */
 973
 974 #endif /* !OPENSSL_NO_HW_CSWIFT */
 975 #endif /* !OPENSSL_NO_HW */