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_BN_mod_exp(e, &cswift_mod_exp) ||
 280                         !ENGINE_set_BN_mod_exp_crt(e, &cswift_mod_exp_crt) ||
 281                         !ENGINE_set_destroy_function(e, cswift_destroy) ||
 282                         !ENGINE_set_init_function(e, cswift_init) ||
 283                         !ENGINE_set_finish_function(e, cswift_finish) ||
 284                         !ENGINE_set_ctrl_function(e, cswift_ctrl) ||
 285                         !ENGINE_set_cmd_defns(e, cswift_cmd_defns))
 286                 return 0;
 287
 288 #ifndef OPENSSL_NO_RSA
 289         /* We know that the "PKCS1_SSLeay()" functions hook properly
 290          * to the cswift-specific mod_exp and mod_exp_crt so we use
 291          * those functions. NB: We don't use ENGINE_openssl() or
 292          * anything "more generic" because something like the RSAref
 293          * code may not hook properly, and if you own one of these
 294          * cards then you have the right to do RSA operations on it
 295          * anyway! */
 296         meth1 = RSA_PKCS1_SSLeay();
 297         cswift_rsa.rsa_pub_enc = meth1->rsa_pub_enc;
 298         cswift_rsa.rsa_pub_dec = meth1->rsa_pub_dec;
 299         cswift_rsa.rsa_priv_enc = meth1->rsa_priv_enc;
 300         cswift_rsa.rsa_priv_dec = meth1->rsa_priv_dec;
 301 #endif
 302
 303 #ifndef OPENSSL_NO_DH
 304         /* Much the same for Diffie-Hellman */
 305         meth2 = DH_OpenSSL();
 306         cswift_dh.generate_key = meth2->generate_key;
 307         cswift_dh.compute_key = meth2->compute_key;
 308 #endif
 309
 310         /* Ensure the cswift error handling is set up */
 311         cswift_load_error_strings();
 312         return 1;
 313         }
 314
 315 /* As this is only ever called once, there's no need for locking
 316  * (indeed - the lock will already be held by our caller!!!) */
 317 ENGINE *ENGINE_cswift(void)
 318         {
 319         ENGINE *ret = ENGINE_new();
 320         if(!ret)
 321                 return NULL;
 322         if(!bind_helper(ret))
 323                 {
 324                 ENGINE_free(ret);
 325                 return NULL;
 326                 }
 327         return ret;
 328         }
 329
 330 /* This is a process-global DSO handle used for loading and unloading
 331  * the CryptoSwift library. NB: This is only set (or unset) during an
 332  * init() or finish() call (reference counts permitting) and they're
 333  * operating with global locks, so this should be thread-safe
 334  * implicitly. */
 335 static DSO *cswift_dso = NULL;
 336
 337 /* These are the function pointers that are (un)set when the library has
 338  * successfully (un)loaded. */
 339 t_swAcquireAccContext *p_CSwift_AcquireAccContext = NULL;
 340 t_swAttachKeyParam *p_CSwift_AttachKeyParam = NULL;
 341 t_swSimpleRequest *p_CSwift_SimpleRequest = NULL;
 342 t_swReleaseAccContext *p_CSwift_ReleaseAccContext = NULL;
 343
 344 /* Used in the DSO operations. */
 345 static const char def_CSWIFT_LIBNAME[] = "swift";
 346 static const char *CSWIFT_LIBNAME = def_CSWIFT_LIBNAME;
 347 static const char *CSWIFT_F1 = "swAcquireAccContext";
 348 static const char *CSWIFT_F2 = "swAttachKeyParam";
 349 static const char *CSWIFT_F3 = "swSimpleRequest";
 350 static const char *CSWIFT_F4 = "swReleaseAccContext";
 351
 352
 353 /* CryptoSwift library functions and mechanics - these are used by the
 354  * higher-level functions further down. NB: As and where there's no
 355  * error checking, take a look lower down where these functions are
 356  * called, the checking and error handling is probably down there. */
 357
 358 /* utility function to obtain a context */
 359 static int get_context(SW_CONTEXT_HANDLE *hac)
 360         {
 361         SW_STATUS status;
 362
 363         status = p_CSwift_AcquireAccContext(hac);
 364         if(status != SW_OK)
 365                 return 0;
 366         return 1;
 367         }
 368
 369 /* similarly to release one. */
 370 static void release_context(SW_CONTEXT_HANDLE hac)
 371         {
 372         p_CSwift_ReleaseAccContext(hac);
 373         }
 374
 375 /* Destructor (complements the "ENGINE_cswift()" constructor) */
 376 static int cswift_destroy(ENGINE *e)
 377         {
 378         cswift_unload_error_strings();
 379         return 1;
 380         }
 381
 382 /* (de)initialisation functions. */
 383 static int cswift_init(ENGINE *e)
 384         {
 385         SW_CONTEXT_HANDLE hac;
 386         t_swAcquireAccContext *p1;
 387         t_swAttachKeyParam *p2;
 388         t_swSimpleRequest *p3;
 389         t_swReleaseAccContext *p4;
 390
 391         if(cswift_dso != NULL)
 392                 {
 393                 CSWIFTerr(CSWIFT_F_CSWIFT_INIT,CSWIFT_R_ALREADY_LOADED);
 394                 goto err;
 395                 }
 396         /* Attempt to load libswift.so/swift.dll/whatever. */
 397         cswift_dso = DSO_load(NULL, CSWIFT_LIBNAME, NULL, 0);
 398         if(cswift_dso == NULL)
 399                 {
 400                 CSWIFTerr(CSWIFT_F_CSWIFT_INIT,CSWIFT_R_NOT_LOADED);
 401                 goto err;
 402                 }
 403         if(!(p1 = (t_swAcquireAccContext *)
 404                                 DSO_bind_func(cswift_dso, CSWIFT_F1)) ||
 405                         !(p2 = (t_swAttachKeyParam *)
 406                                 DSO_bind_func(cswift_dso, CSWIFT_F2)) ||
 407                         !(p3 = (t_swSimpleRequest *)
 408                                 DSO_bind_func(cswift_dso, CSWIFT_F3)) ||
 409                         !(p4 = (t_swReleaseAccContext *)
 410                                 DSO_bind_func(cswift_dso, CSWIFT_F4)))
 411                 {
 412                 CSWIFTerr(CSWIFT_F_CSWIFT_INIT,CSWIFT_R_NOT_LOADED);
 413                 goto err;
 414                 }
 415         /* Copy the pointers */
 416         p_CSwift_AcquireAccContext = p1;
 417         p_CSwift_AttachKeyParam = p2;
 418         p_CSwift_SimpleRequest = p3;
 419         p_CSwift_ReleaseAccContext = p4;
 420         /* Try and get a context - if not, we may have a DSO but no
 421          * accelerator! */
 422         if(!get_context(&hac))
 423                 {
 424                 CSWIFTerr(CSWIFT_F_CSWIFT_INIT,CSWIFT_R_UNIT_FAILURE);
 425                 goto err;
 426                 }
 427         release_context(hac);
 428         /* Everything's fine. */
 429         return 1;
 430 err:
 431         if(cswift_dso)
 432                 DSO_free(cswift_dso);
 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         if(cswift_dso == NULL)
 443                 {
 444                 CSWIFTerr(CSWIFT_F_CSWIFT_FINISH,CSWIFT_R_NOT_LOADED);
 445                 return 0;
 446                 }
 447         if(!DSO_free(cswift_dso))
 448                 {
 449                 CSWIFTerr(CSWIFT_F_CSWIFT_FINISH,CSWIFT_R_UNIT_FAILURE);
 450                 return 0;
 451                 }
 452         cswift_dso = NULL;
 453         p_CSwift_AcquireAccContext = NULL;
 454         p_CSwift_AttachKeyParam = NULL;
 455         p_CSwift_SimpleRequest = NULL;
 456         p_CSwift_ReleaseAccContext = NULL;
 457         return 1;
 458         }
 459
 460 static int cswift_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f)())
 461         {
 462         int initialised = ((cswift_dso == NULL) ? 0 : 1);
 463         switch(cmd)
 464                 {
 465         case CSWIFT_CMD_SO_PATH:
 466                 if(p == NULL)
 467                         {
 468                         CSWIFTerr(CSWIFT_F_CSWIFT_CTRL,ERR_R_PASSED_NULL_PARAMETER);
 469                         return 0;
 470                         }
 471                 if(initialised)
 472                         {
 473                         CSWIFTerr(CSWIFT_F_CSWIFT_CTRL,CSWIFT_R_ALREADY_LOADED);
 474                         return 0;
 475                         }
 476                 CSWIFT_LIBNAME = (const char *)p;
 477                 return 1;
 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[20];
 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[20];
 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 /* Un petit mod_exp chinois */
 583 static int cswift_mod_exp_crt(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
 584                         const BIGNUM *q, const BIGNUM *dmp1,
 585                         const BIGNUM *dmq1, const BIGNUM *iqmp, BN_CTX *ctx)
 586         {
 587         SW_STATUS sw_status;
 588         SW_LARGENUMBER arg, res;
 589         SW_PARAM sw_param;
 590         SW_CONTEXT_HANDLE hac;
 591         BIGNUM *rsa_p = NULL;
 592         BIGNUM *rsa_q = NULL;
 593         BIGNUM *rsa_dmp1 = NULL;
 594         BIGNUM *rsa_dmq1 = NULL;
 595         BIGNUM *rsa_iqmp = NULL;
 596         BIGNUM *argument = NULL;
 597         BIGNUM *result = NULL;
 598         int to_return = 0; /* expect failure */
 599         int acquired = 0;
 600
 601         if(!get_context(&hac))
 602                 {
 603                 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP_CRT,CSWIFT_R_UNIT_FAILURE);
 604                 goto err;
 605                 }
 606         acquired = 1;
 607         /* Prepare the params */
 608         BN_CTX_start(ctx);
 609         rsa_p = BN_CTX_get(ctx);
 610         rsa_q = BN_CTX_get(ctx);
 611         rsa_dmp1 = BN_CTX_get(ctx);
 612         rsa_dmq1 = BN_CTX_get(ctx);
 613         rsa_iqmp = BN_CTX_get(ctx);
 614         argument = BN_CTX_get(ctx);
 615         result = BN_CTX_get(ctx);
 616         if(!result)
 617                 {
 618                 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP_CRT,CSWIFT_R_BN_CTX_FULL);
 619                 goto err;
 620                 }
 621         if(!bn_wexpand(rsa_p, p->top) || !bn_wexpand(rsa_q, q->top) ||
 622                         !bn_wexpand(rsa_dmp1, dmp1->top) ||
 623                         !bn_wexpand(rsa_dmq1, dmq1->top) ||
 624                         !bn_wexpand(rsa_iqmp, iqmp->top) ||
 625                         !bn_wexpand(argument, a->top) ||
 626                         !bn_wexpand(result, p->top + q->top))
 627                 {
 628                 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP_CRT,CSWIFT_R_BN_EXPAND_FAIL);
 629                 goto err;
 630                 }
 631         sw_param.type = SW_ALG_CRT;
 632         sw_param.up.crt.p.nbytes = BN_bn2bin(p, (unsigned char *)rsa_p->d);
 633         sw_param.up.crt.p.value = (unsigned char *)rsa_p->d;
 634         sw_param.up.crt.q.nbytes = BN_bn2bin(q, (unsigned char *)rsa_q->d);
 635         sw_param.up.crt.q.value = (unsigned char *)rsa_q->d;
 636         sw_param.up.crt.dmp1.nbytes = BN_bn2bin(dmp1,
 637                 (unsigned char *)rsa_dmp1->d);
 638         sw_param.up.crt.dmp1.value = (unsigned char *)rsa_dmp1->d;
 639         sw_param.up.crt.dmq1.nbytes = BN_bn2bin(dmq1,
 640                 (unsigned char *)rsa_dmq1->d);
 641         sw_param.up.crt.dmq1.value = (unsigned char *)rsa_dmq1->d;
 642         sw_param.up.crt.iqmp.nbytes = BN_bn2bin(iqmp,
 643                 (unsigned char *)rsa_iqmp->d);
 644         sw_param.up.crt.iqmp.value = (unsigned char *)rsa_iqmp->d;
 645         /* Attach the key params */
 646         sw_status = p_CSwift_AttachKeyParam(hac, &sw_param);
 647         switch(sw_status)
 648                 {
 649         case SW_OK:
 650                 break;
 651         case SW_ERR_INPUT_SIZE:
 652                 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP_CRT,CSWIFT_R_BAD_KEY_SIZE);
 653                 goto err;
 654         default:
 655                 {
 656                 char tmpbuf[20];
 657                 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP_CRT,CSWIFT_R_REQUEST_FAILED);
 658                 sprintf(tmpbuf, "%ld", sw_status);
 659                 ERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf);
 660                 }
 661                 goto err;
 662                 }
 663         /* Prepare the argument and response */
 664         arg.nbytes = BN_bn2bin(a, (unsigned char *)argument->d);
 665         arg.value = (unsigned char *)argument->d;
 666         res.nbytes = 2 * BN_num_bytes(p);
 667         memset(result->d, 0, res.nbytes);
 668         res.value = (unsigned char *)result->d;
 669         /* Perform the operation */
 670         if((sw_status = p_CSwift_SimpleRequest(hac, SW_CMD_MODEXP_CRT, &arg, 1,
 671                 &res, 1)) != SW_OK)
 672                 {
 673                 char tmpbuf[20];
 674                 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP_CRT,CSWIFT_R_REQUEST_FAILED);
 675                 sprintf(tmpbuf, "%ld", sw_status);
 676                 ERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf);
 677                 goto err;
 678                 }
 679         /* Convert the response */
 680         BN_bin2bn((unsigned char *)result->d, res.nbytes, r);
 681         to_return = 1;
 682 err:
 683         if(acquired)
 684                 release_context(hac);
 685         BN_CTX_end(ctx);
 686         return to_return;
 687         }
 688
 689 #ifndef OPENSSL_NO_RSA
 690 static int cswift_rsa_mod_exp(BIGNUM *r0, const BIGNUM *I, RSA *rsa)
 691         {
 692         BN_CTX *ctx;
 693         int to_return = 0;
 694
 695         if((ctx = BN_CTX_new()) == NULL)
 696                 goto err;
 697         if(!rsa->p || !rsa->q || !rsa->dmp1 || !rsa->dmq1 || !rsa->iqmp)
 698                 {
 699                 CSWIFTerr(CSWIFT_F_CSWIFT_RSA_MOD_EXP,CSWIFT_R_MISSING_KEY_COMPONENTS);
 700                 goto err;
 701                 }
 702         to_return = cswift_mod_exp_crt(r0, I, rsa->p, rsa->q, rsa->dmp1,
 703                 rsa->dmq1, rsa->iqmp, ctx);
 704 err:
 705         if(ctx)
 706                 BN_CTX_free(ctx);
 707         return to_return;
 708         }
 709 #endif
 710
 711 /* This function is aliased to mod_exp (with the mont stuff dropped). */
 712 static int cswift_mod_exp_mont(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
 713                 const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx)
 714         {
 715         return cswift_mod_exp(r, a, p, m, ctx);
 716         }
 717
 718 #ifndef OPENSSL_NO_DSA
 719 static DSA_SIG *cswift_dsa_sign(const unsigned char *dgst, int dlen, DSA *dsa)
 720         {
 721         SW_CONTEXT_HANDLE hac;
 722         SW_PARAM sw_param;
 723         SW_STATUS sw_status;
 724         SW_LARGENUMBER arg, res;
 725         unsigned char *ptr;
 726         BN_CTX *ctx;
 727         BIGNUM *dsa_p = NULL;
 728         BIGNUM *dsa_q = NULL;
 729         BIGNUM *dsa_g = NULL;
 730         BIGNUM *dsa_key = NULL;
 731         BIGNUM *result = NULL;
 732         DSA_SIG *to_return = NULL;
 733         int acquired = 0;
 734
 735         if((ctx = BN_CTX_new()) == NULL)
 736                 goto err;
 737         if(!get_context(&hac))
 738                 {
 739                 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_SIGN,CSWIFT_R_UNIT_FAILURE);
 740                 goto err;
 741                 }
 742         acquired = 1;
 743         /* Prepare the params */
 744         BN_CTX_start(ctx);
 745         dsa_p = BN_CTX_get(ctx);
 746         dsa_q = BN_CTX_get(ctx);
 747         dsa_g = BN_CTX_get(ctx);
 748         dsa_key = BN_CTX_get(ctx);
 749         result = BN_CTX_get(ctx);
 750         if(!result)
 751                 {
 752                 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_SIGN,CSWIFT_R_BN_CTX_FULL);
 753                 goto err;
 754                 }
 755         if(!bn_wexpand(dsa_p, dsa->p->top) ||
 756                         !bn_wexpand(dsa_q, dsa->q->top) ||
 757                         !bn_wexpand(dsa_g, dsa->g->top) ||
 758                         !bn_wexpand(dsa_key, dsa->priv_key->top) ||
 759                         !bn_wexpand(result, dsa->p->top))
 760                 {
 761                 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_SIGN,CSWIFT_R_BN_EXPAND_FAIL);
 762                 goto err;
 763                 }
 764         sw_param.type = SW_ALG_DSA;
 765         sw_param.up.dsa.p.nbytes = BN_bn2bin(dsa->p,
 766                                 (unsigned char *)dsa_p->d);
 767         sw_param.up.dsa.p.value = (unsigned char *)dsa_p->d;
 768         sw_param.up.dsa.q.nbytes = BN_bn2bin(dsa->q,
 769                                 (unsigned char *)dsa_q->d);
 770         sw_param.up.dsa.q.value = (unsigned char *)dsa_q->d;
 771         sw_param.up.dsa.g.nbytes = BN_bn2bin(dsa->g,
 772                                 (unsigned char *)dsa_g->d);
 773         sw_param.up.dsa.g.value = (unsigned char *)dsa_g->d;
 774         sw_param.up.dsa.key.nbytes = BN_bn2bin(dsa->priv_key,
 775                                 (unsigned char *)dsa_key->d);
 776         sw_param.up.dsa.key.value = (unsigned char *)dsa_key->d;
 777         /* Attach the key params */
 778         sw_status = p_CSwift_AttachKeyParam(hac, &sw_param);
 779         switch(sw_status)
 780                 {
 781         case SW_OK:
 782                 break;
 783         case SW_ERR_INPUT_SIZE:
 784                 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_SIGN,CSWIFT_R_BAD_KEY_SIZE);
 785                 goto err;
 786         default:
 787                 {
 788                 char tmpbuf[20];
 789                 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_SIGN,CSWIFT_R_REQUEST_FAILED);
 790                 sprintf(tmpbuf, "%ld", sw_status);
 791                 ERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf);
 792                 }
 793                 goto err;
 794                 }
 795         /* Prepare the argument and response */
 796         arg.nbytes = dlen;
 797         arg.value = (unsigned char *)dgst;
 798         res.nbytes = BN_num_bytes(dsa->p);
 799         memset(result->d, 0, res.nbytes);
 800         res.value = (unsigned char *)result->d;
 801         /* Perform the operation */
 802         sw_status = p_CSwift_SimpleRequest(hac, SW_CMD_DSS_SIGN, &arg, 1,
 803                 &res, 1);
 804         if(sw_status != SW_OK)
 805                 {
 806                 char tmpbuf[20];
 807                 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_SIGN,CSWIFT_R_REQUEST_FAILED);
 808                 sprintf(tmpbuf, "%ld", sw_status);
 809                 ERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf);
 810                 goto err;
 811                 }
 812         /* Convert the response */
 813         ptr = (unsigned char *)result->d;
 814         if((to_return = DSA_SIG_new()) == NULL)
 815                 goto err;
 816         to_return->r = BN_bin2bn((unsigned char *)result->d, 20, NULL);
 817         to_return->s = BN_bin2bn((unsigned char *)result->d + 20, 20, NULL);
 818
 819 err:
 820         if(acquired)
 821                 release_context(hac);
 822         if(ctx)
 823                 {
 824                 BN_CTX_end(ctx);
 825                 BN_CTX_free(ctx);
 826                 }
 827         return to_return;
 828         }
 829
 830 static int cswift_dsa_verify(const unsigned char *dgst, int dgst_len,
 831                                 DSA_SIG *sig, DSA *dsa)
 832         {
 833         SW_CONTEXT_HANDLE hac;
 834         SW_PARAM sw_param;
 835         SW_STATUS sw_status;
 836         SW_LARGENUMBER arg[2], res;
 837         unsigned long sig_result;
 838         BN_CTX *ctx;
 839         BIGNUM *dsa_p = NULL;
 840         BIGNUM *dsa_q = NULL;
 841         BIGNUM *dsa_g = NULL;
 842         BIGNUM *dsa_key = NULL;
 843         BIGNUM *argument = NULL;
 844         int to_return = -1;
 845         int acquired = 0;
 846
 847         if((ctx = BN_CTX_new()) == NULL)
 848                 goto err;
 849         if(!get_context(&hac))
 850                 {
 851                 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_VERIFY,CSWIFT_R_UNIT_FAILURE);
 852                 goto err;
 853                 }
 854         acquired = 1;
 855         /* Prepare the params */
 856         BN_CTX_start(ctx);
 857         dsa_p = BN_CTX_get(ctx);
 858         dsa_q = BN_CTX_get(ctx);
 859         dsa_g = BN_CTX_get(ctx);
 860         dsa_key = BN_CTX_get(ctx);
 861         argument = BN_CTX_get(ctx);
 862         if(!argument)
 863                 {
 864                 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_VERIFY,CSWIFT_R_BN_CTX_FULL);
 865                 goto err;
 866                 }
 867         if(!bn_wexpand(dsa_p, dsa->p->top) ||
 868                         !bn_wexpand(dsa_q, dsa->q->top) ||
 869                         !bn_wexpand(dsa_g, dsa->g->top) ||
 870                         !bn_wexpand(dsa_key, dsa->pub_key->top) ||
 871                         !bn_wexpand(argument, 40))
 872                 {
 873                 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_VERIFY,CSWIFT_R_BN_EXPAND_FAIL);
 874                 goto err;
 875                 }
 876         sw_param.type = SW_ALG_DSA;
 877         sw_param.up.dsa.p.nbytes = BN_bn2bin(dsa->p,
 878                                 (unsigned char *)dsa_p->d);
 879         sw_param.up.dsa.p.value = (unsigned char *)dsa_p->d;
 880         sw_param.up.dsa.q.nbytes = BN_bn2bin(dsa->q,
 881                                 (unsigned char *)dsa_q->d);
 882         sw_param.up.dsa.q.value = (unsigned char *)dsa_q->d;
 883         sw_param.up.dsa.g.nbytes = BN_bn2bin(dsa->g,
 884                                 (unsigned char *)dsa_g->d);
 885         sw_param.up.dsa.g.value = (unsigned char *)dsa_g->d;
 886         sw_param.up.dsa.key.nbytes = BN_bn2bin(dsa->pub_key,
 887                                 (unsigned char *)dsa_key->d);
 888         sw_param.up.dsa.key.value = (unsigned char *)dsa_key->d;
 889         /* Attach the key params */
 890         sw_status = p_CSwift_AttachKeyParam(hac, &sw_param);
 891         switch(sw_status)
 892                 {
 893         case SW_OK:
 894                 break;
 895         case SW_ERR_INPUT_SIZE:
 896                 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_VERIFY,CSWIFT_R_BAD_KEY_SIZE);
 897                 goto err;
 898         default:
 899                 {
 900                 char tmpbuf[20];
 901                 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_VERIFY,CSWIFT_R_REQUEST_FAILED);
 902                 sprintf(tmpbuf, "%ld", sw_status);
 903                 ERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf);
 904                 }
 905                 goto err;
 906                 }
 907         /* Prepare the argument and response */
 908         arg[0].nbytes = dgst_len;
 909         arg[0].value = (unsigned char *)dgst;
 910         arg[1].nbytes = 40;
 911         arg[1].value = (unsigned char *)argument->d;
 912         memset(arg[1].value, 0, 40);
 913         BN_bn2bin(sig->r, arg[1].value + 20 - BN_num_bytes(sig->r));
 914         BN_bn2bin(sig->s, arg[1].value + 40 - BN_num_bytes(sig->s));
 915         res.nbytes = 4; /* unsigned long */
 916         res.value = (unsigned char *)(&sig_result);
 917         /* Perform the operation */
 918         sw_status = p_CSwift_SimpleRequest(hac, SW_CMD_DSS_VERIFY, arg, 2,
 919                 &res, 1);
 920         if(sw_status != SW_OK)
 921                 {
 922                 char tmpbuf[20];
 923                 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_VERIFY,CSWIFT_R_REQUEST_FAILED);
 924                 sprintf(tmpbuf, "%ld", sw_status);
 925                 ERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf);
 926                 goto err;
 927                 }
 928         /* Convert the response */
 929         to_return = ((sig_result == 0) ? 0 : 1);
 930
 931 err:
 932         if(acquired)
 933                 release_context(hac);
 934         if(ctx)
 935                 {
 936                 BN_CTX_end(ctx);
 937                 BN_CTX_free(ctx);
 938                 }
 939         return to_return;
 940         }
 941 #endif
 942
 943 #ifndef OPENSSL_NO_DH
 944 /* This function is aliased to mod_exp (with the dh and mont dropped). */
 945 static int cswift_mod_exp_dh(const DH *dh, BIGNUM *r,
 946                 const BIGNUM *a, const BIGNUM *p,
 947                 const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx)
 948         {
 949         return cswift_mod_exp(r, a, p, m, ctx);
 950         }
 951 #endif
 952
 953 /* This stuff is needed if this ENGINE is being compiled into a self-contained
 954  * shared-library. */
 955 #ifdef ENGINE_DYNAMIC_SUPPORT
 956 static int bind_fn(ENGINE *e, const char *id)
 957         {
 958         if(id && (strcmp(id, engine_cswift_id) != 0))
 959                 return 0;
 960         if(!bind_helper(e))
 961                 return 0;
 962         return 1;
 963         }
 964 IMPLEMENT_DYNAMIC_CHECK_FN()
 965 IMPLEMENT_DYNAMIC_BIND_FN(bind_fn)
 966 #endif /* ENGINE_DYNAMIC_SUPPORT */
 967
 968 #endif /* !OPENSSL_NO_HW_CSWIFT */
 969 #endif /* !OPENSSL_NO_HW */