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 #include <openssl/rsa.h>
  66 #include <openssl/dsa.h>
  67 #include <openssl/dh.h>
  68 #include <openssl/rand.h>
  69 #include <openssl/bn.h>
  70
  71 #ifndef OPENSSL_NO_HW
  72 #ifndef OPENSSL_NO_HW_CSWIFT
  73
  74 /* Attribution notice: Rainbow have generously allowed me to reproduce
  75  * the necessary definitions here from their API. This means the support
  76  * can build independently of whether application builders have the
  77  * API or hardware. This will allow developers to easily produce software
  78  * that has latent hardware support for any users that have accelerators
  79  * installed, without the developers themselves needing anything extra.
  80  *
  81  * I have only clipped the parts from the CryptoSwift header files that
  82  * are (or seem) relevant to the CryptoSwift support code. This is
  83  * simply to keep the file sizes reasonable.
  84  * [Geoff]
  85  */
  86 #ifdef FLAT_INC
  87 #include "cswift.h"
  88 #else
  89 #include "vendor_defns/cswift.h"
  90 #endif
  91
  92 #define CSWIFT_LIB_NAME "cswift engine"
  93 #include "e_cswift_err.c"
  94
  95 #define DECIMAL_SIZE(type)      ((sizeof(type)*8+2)/3+1)
  96
  97 static int cswift_destroy(ENGINE *e);
  98 static int cswift_init(ENGINE *e);
  99 static int cswift_finish(ENGINE *e);
 100 static int cswift_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f)(void));
 101
 102 /* BIGNUM stuff */
 103 static int cswift_mod_exp(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
 104                 const BIGNUM *m, BN_CTX *ctx);
 105 static int cswift_mod_exp_crt(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
 106                 const BIGNUM *q, const BIGNUM *dmp1, const BIGNUM *dmq1,
 107                 const BIGNUM *iqmp, BN_CTX *ctx);
 108
 109 #ifndef OPENSSL_NO_RSA
 110 /* RSA stuff */
 111 static int cswift_rsa_mod_exp(BIGNUM *r0, const BIGNUM *I, RSA *rsa, BN_CTX *ctx);
 112 #endif
 113 /* This function is aliased to mod_exp (with the mont stuff dropped). */
 114 static int cswift_mod_exp_mont(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
 115                 const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx);
 116
 117 #ifndef OPENSSL_NO_DSA
 118 /* DSA stuff */
 119 static DSA_SIG *cswift_dsa_sign(const unsigned char *dgst, int dlen, DSA *dsa);
 120 static int cswift_dsa_verify(const unsigned char *dgst, int dgst_len,
 121                                 DSA_SIG *sig, DSA *dsa);
 122 #endif
 123
 124 #ifndef OPENSSL_NO_DH
 125 /* DH stuff */
 126 /* This function is alised to mod_exp (with the DH and mont dropped). */
 127 static int cswift_mod_exp_dh(const DH *dh, BIGNUM *r,
 128                 const BIGNUM *a, const BIGNUM *p,
 129                 const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx);
 130 #endif
 131
 132 /* RAND stuff */
 133 static int cswift_rand_bytes(unsigned char *buf, int num);
 134 static int cswift_rand_status(void);
 135
 136 /* The definitions for control commands specific to this engine */
 137 #define CSWIFT_CMD_SO_PATH              ENGINE_CMD_BASE
 138 static const ENGINE_CMD_DEFN cswift_cmd_defns[] = {
 139         {CSWIFT_CMD_SO_PATH,
 140                 "SO_PATH",
 141                 "Specifies the path to the 'cswift' shared library",
 142                 ENGINE_CMD_FLAG_STRING},
 143         {0, NULL, NULL, 0}
 144         };
 145
 146 #ifndef OPENSSL_NO_RSA
 147 /* Our internal RSA_METHOD that we provide pointers to */
 148 static RSA_METHOD cswift_rsa =
 149         {
 150         "CryptoSwift RSA method",
 151         NULL,
 152         NULL,
 153         NULL,
 154         NULL,
 155         cswift_rsa_mod_exp,
 156         cswift_mod_exp_mont,
 157         NULL,
 158         NULL,
 159         0,
 160         NULL,
 161         NULL,
 162         NULL,
 163         NULL
 164         };
 165 #endif
 166
 167 #ifndef OPENSSL_NO_DSA
 168 /* Our internal DSA_METHOD that we provide pointers to */
 169 static DSA_METHOD cswift_dsa =
 170         {
 171         "CryptoSwift DSA method",
 172         cswift_dsa_sign,
 173         NULL, /* dsa_sign_setup */
 174         cswift_dsa_verify,
 175         NULL, /* dsa_mod_exp */
 176         NULL, /* bn_mod_exp */
 177         NULL, /* init */
 178         NULL, /* finish */
 179         0, /* flags */
 180         NULL, /* app_data */
 181         NULL, /* dsa_paramgen */
 182         NULL /* dsa_keygen */
 183         };
 184 #endif
 185
 186 #ifndef OPENSSL_NO_DH
 187 /* Our internal DH_METHOD that we provide pointers to */
 188 static DH_METHOD cswift_dh =
 189         {
 190         "CryptoSwift DH method",
 191         NULL,
 192         NULL,
 193         cswift_mod_exp_dh,
 194         NULL,
 195         NULL,
 196         0,
 197         NULL,
 198         NULL
 199         };
 200 #endif
 201
 202 static RAND_METHOD cswift_random =
 203     {
 204     /* "CryptoSwift RAND method", */
 205     NULL,
 206     cswift_rand_bytes,
 207     NULL,
 208     NULL,
 209     cswift_rand_bytes,
 210     cswift_rand_status,
 211     };
 212
 213
 214 /* Constants used when creating the ENGINE */
 215 static const char *engine_cswift_id = "cswift";
 216 static const char *engine_cswift_name = "CryptoSwift hardware engine support";
 217
 218 /* This internal function is used by ENGINE_cswift() and possibly by the
 219  * "dynamic" ENGINE support too */
 220 static int bind_helper(ENGINE *e)
 221         {
 222 #ifndef OPENSSL_NO_RSA
 223         const RSA_METHOD *meth1;
 224 #endif
 225 #ifndef OPENSSL_NO_DH
 226         const DH_METHOD *meth2;
 227 #endif
 228         if(!ENGINE_set_id(e, engine_cswift_id) ||
 229                         !ENGINE_set_name(e, engine_cswift_name) ||
 230 #ifndef OPENSSL_NO_RSA
 231                         !ENGINE_set_RSA(e, &cswift_rsa) ||
 232 #endif
 233 #ifndef OPENSSL_NO_DSA
 234                         !ENGINE_set_DSA(e, &cswift_dsa) ||
 235 #endif
 236 #ifndef OPENSSL_NO_DH
 237                         !ENGINE_set_DH(e, &cswift_dh) ||
 238 #endif
 239                         !ENGINE_set_RAND(e, &cswift_random) ||
 240                         !ENGINE_set_destroy_function(e, cswift_destroy) ||
 241                         !ENGINE_set_init_function(e, cswift_init) ||
 242                         !ENGINE_set_finish_function(e, cswift_finish) ||
 243                         !ENGINE_set_ctrl_function(e, cswift_ctrl) ||
 244                         !ENGINE_set_cmd_defns(e, cswift_cmd_defns))
 245                 return 0;
 246
 247 #ifndef OPENSSL_NO_RSA
 248         /* We know that the "PKCS1_SSLeay()" functions hook properly
 249          * to the cswift-specific mod_exp and mod_exp_crt so we use
 250          * those functions. NB: We don't use ENGINE_openssl() or
 251          * anything "more generic" because something like the RSAref
 252          * code may not hook properly, and if you own one of these
 253          * cards then you have the right to do RSA operations on it
 254          * anyway! */
 255         meth1 = RSA_PKCS1_SSLeay();
 256         cswift_rsa.rsa_pub_enc = meth1->rsa_pub_enc;
 257         cswift_rsa.rsa_pub_dec = meth1->rsa_pub_dec;
 258         cswift_rsa.rsa_priv_enc = meth1->rsa_priv_enc;
 259         cswift_rsa.rsa_priv_dec = meth1->rsa_priv_dec;
 260 #endif
 261
 262 #ifndef OPENSSL_NO_DH
 263         /* Much the same for Diffie-Hellman */
 264         meth2 = DH_OpenSSL();
 265         cswift_dh.generate_key = meth2->generate_key;
 266         cswift_dh.compute_key = meth2->compute_key;
 267 #endif
 268
 269         /* Ensure the cswift error handling is set up */
 270         ERR_load_CSWIFT_strings();
 271         return 1;
 272         }
 273
 274 #ifdef OPENSSL_NO_DYNAMIC_ENGINE
 275 static ENGINE *engine_cswift(void)
 276         {
 277         ENGINE *ret = ENGINE_new();
 278         if(!ret)
 279                 return NULL;
 280         if(!bind_helper(ret))
 281                 {
 282                 ENGINE_free(ret);
 283                 return NULL;
 284                 }
 285         return ret;
 286         }
 287
 288 void ENGINE_load_cswift(void)
 289         {
 290         /* Copied from eng_[openssl|dyn].c */
 291         ENGINE *toadd = engine_cswift();
 292         if(!toadd) return;
 293         ENGINE_add(toadd);
 294         ENGINE_free(toadd);
 295         ERR_clear_error();
 296         }
 297 #endif
 298
 299 /* This is a process-global DSO handle used for loading and unloading
 300  * the CryptoSwift library. NB: This is only set (or unset) during an
 301  * init() or finish() call (reference counts permitting) and they're
 302  * operating with global locks, so this should be thread-safe
 303  * implicitly. */
 304 static DSO *cswift_dso = NULL;
 305
 306 /* These are the function pointers that are (un)set when the library has
 307  * successfully (un)loaded. */
 308 t_swAcquireAccContext *p_CSwift_AcquireAccContext = NULL;
 309 t_swAttachKeyParam *p_CSwift_AttachKeyParam = NULL;
 310 t_swSimpleRequest *p_CSwift_SimpleRequest = NULL;
 311 t_swReleaseAccContext *p_CSwift_ReleaseAccContext = NULL;
 312
 313 /* Used in the DSO operations. */
 314 static const char *CSWIFT_LIBNAME = NULL;
 315 static const char *get_CSWIFT_LIBNAME(void)
 316         {
 317         if(CSWIFT_LIBNAME)
 318                 return CSWIFT_LIBNAME;
 319         return "swift";
 320         }
 321 static void free_CSWIFT_LIBNAME(void)
 322         {
 323         if(CSWIFT_LIBNAME)
 324                 OPENSSL_free((void*)CSWIFT_LIBNAME);
 325         CSWIFT_LIBNAME = NULL;
 326         }
 327 static long set_CSWIFT_LIBNAME(const char *name)
 328         {
 329         free_CSWIFT_LIBNAME();
 330         return (((CSWIFT_LIBNAME = BUF_strdup(name)) != NULL) ? 1 : 0);
 331         }
 332 static const char *CSWIFT_F1 = "swAcquireAccContext";
 333 static const char *CSWIFT_F2 = "swAttachKeyParam";
 334 static const char *CSWIFT_F3 = "swSimpleRequest";
 335 static const char *CSWIFT_F4 = "swReleaseAccContext";
 336
 337
 338 /* CryptoSwift library functions and mechanics - these are used by the
 339  * higher-level functions further down. NB: As and where there's no
 340  * error checking, take a look lower down where these functions are
 341  * called, the checking and error handling is probably down there. */
 342
 343 /* utility function to obtain a context */
 344 static int get_context(SW_CONTEXT_HANDLE *hac)
 345         {
 346         SW_STATUS status;
 347
 348         status = p_CSwift_AcquireAccContext(hac);
 349         if(status != SW_OK)
 350                 return 0;
 351         return 1;
 352         }
 353
 354 /* similarly to release one. */
 355 static void release_context(SW_CONTEXT_HANDLE hac)
 356         {
 357         p_CSwift_ReleaseAccContext(hac);
 358         }
 359
 360 /* Destructor (complements the "ENGINE_cswift()" constructor) */
 361 static int cswift_destroy(ENGINE *e)
 362         {
 363         free_CSWIFT_LIBNAME();
 364         ERR_unload_CSWIFT_strings();
 365         return 1;
 366         }
 367
 368 /* (de)initialisation functions. */
 369 static int cswift_init(ENGINE *e)
 370         {
 371         SW_CONTEXT_HANDLE hac;
 372         t_swAcquireAccContext *p1;
 373         t_swAttachKeyParam *p2;
 374         t_swSimpleRequest *p3;
 375         t_swReleaseAccContext *p4;
 376
 377         if(cswift_dso != NULL)
 378                 {
 379                 CSWIFTerr(CSWIFT_F_CSWIFT_INIT,CSWIFT_R_ALREADY_LOADED);
 380                 goto err;
 381                 }
 382         /* Attempt to load libswift.so/swift.dll/whatever. */
 383         cswift_dso = DSO_load(NULL, get_CSWIFT_LIBNAME(), NULL, 0);
 384         if(cswift_dso == NULL)
 385                 {
 386                 CSWIFTerr(CSWIFT_F_CSWIFT_INIT,CSWIFT_R_NOT_LOADED);
 387                 goto err;
 388                 }
 389         if(!(p1 = (t_swAcquireAccContext *)
 390                                 DSO_bind_func(cswift_dso, CSWIFT_F1)) ||
 391                         !(p2 = (t_swAttachKeyParam *)
 392                                 DSO_bind_func(cswift_dso, CSWIFT_F2)) ||
 393                         !(p3 = (t_swSimpleRequest *)
 394                                 DSO_bind_func(cswift_dso, CSWIFT_F3)) ||
 395                         !(p4 = (t_swReleaseAccContext *)
 396                                 DSO_bind_func(cswift_dso, CSWIFT_F4)))
 397                 {
 398                 CSWIFTerr(CSWIFT_F_CSWIFT_INIT,CSWIFT_R_NOT_LOADED);
 399                 goto err;
 400                 }
 401         /* Copy the pointers */
 402         p_CSwift_AcquireAccContext = p1;
 403         p_CSwift_AttachKeyParam = p2;
 404         p_CSwift_SimpleRequest = p3;
 405         p_CSwift_ReleaseAccContext = p4;
 406         /* Try and get a context - if not, we may have a DSO but no
 407          * accelerator! */
 408         if(!get_context(&hac))
 409                 {
 410                 CSWIFTerr(CSWIFT_F_CSWIFT_INIT,CSWIFT_R_UNIT_FAILURE);
 411                 goto err;
 412                 }
 413         release_context(hac);
 414         /* Everything's fine. */
 415         return 1;
 416 err:
 417         if(cswift_dso)
 418                 DSO_free(cswift_dso);
 419         p_CSwift_AcquireAccContext = NULL;
 420         p_CSwift_AttachKeyParam = NULL;
 421         p_CSwift_SimpleRequest = NULL;
 422         p_CSwift_ReleaseAccContext = NULL;
 423         return 0;
 424         }
 425
 426 static int cswift_finish(ENGINE *e)
 427         {
 428         free_CSWIFT_LIBNAME();
 429         if(cswift_dso == NULL)
 430                 {
 431                 CSWIFTerr(CSWIFT_F_CSWIFT_FINISH,CSWIFT_R_NOT_LOADED);
 432                 return 0;
 433                 }
 434         if(!DSO_free(cswift_dso))
 435                 {
 436                 CSWIFTerr(CSWIFT_F_CSWIFT_FINISH,CSWIFT_R_UNIT_FAILURE);
 437                 return 0;
 438                 }
 439         cswift_dso = NULL;
 440         p_CSwift_AcquireAccContext = NULL;
 441         p_CSwift_AttachKeyParam = NULL;
 442         p_CSwift_SimpleRequest = NULL;
 443         p_CSwift_ReleaseAccContext = NULL;
 444         return 1;
 445         }
 446
 447 static int cswift_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f)(void))
 448         {
 449         int initialised = ((cswift_dso == NULL) ? 0 : 1);
 450         switch(cmd)
 451                 {
 452         case CSWIFT_CMD_SO_PATH:
 453                 if(p == NULL)
 454                         {
 455                         CSWIFTerr(CSWIFT_F_CSWIFT_CTRL,ERR_R_PASSED_NULL_PARAMETER);
 456                         return 0;
 457                         }
 458                 if(initialised)
 459                         {
 460                         CSWIFTerr(CSWIFT_F_CSWIFT_CTRL,CSWIFT_R_ALREADY_LOADED);
 461                         return 0;
 462                         }
 463                 return set_CSWIFT_LIBNAME((const char *)p);
 464         default:
 465                 break;
 466                 }
 467         CSWIFTerr(CSWIFT_F_CSWIFT_CTRL,CSWIFT_R_CTRL_COMMAND_NOT_IMPLEMENTED);
 468         return 0;
 469         }
 470
 471 /* Un petit mod_exp */
 472 static int cswift_mod_exp(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
 473                         const BIGNUM *m, BN_CTX *ctx)
 474         {
 475         /* I need somewhere to store temporary serialised values for
 476          * use with the CryptoSwift API calls. A neat cheat - I'll use
 477          * BIGNUMs from the BN_CTX but access their arrays directly as
 478          * byte arrays <grin>. This way I don't have to clean anything
 479          * up. */
 480         BIGNUM *modulus;
 481         BIGNUM *exponent;
 482         BIGNUM *argument;
 483         BIGNUM *result;
 484         SW_STATUS sw_status;
 485         SW_LARGENUMBER arg, res;
 486         SW_PARAM sw_param;
 487         SW_CONTEXT_HANDLE hac;
 488         int to_return, acquired;
 489
 490         modulus = exponent = argument = result = NULL;
 491         to_return = 0; /* expect failure */
 492         acquired = 0;
 493
 494         if(!get_context(&hac))
 495                 {
 496                 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP,CSWIFT_R_UNIT_FAILURE);
 497                 goto err;
 498                 }
 499         acquired = 1;
 500         /* Prepare the params */
 501         BN_CTX_start(ctx);
 502         modulus = BN_CTX_get(ctx);
 503         exponent = BN_CTX_get(ctx);
 504         argument = BN_CTX_get(ctx);
 505         result = BN_CTX_get(ctx);
 506         if(!result)
 507                 {
 508                 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP,CSWIFT_R_BN_CTX_FULL);
 509                 goto err;
 510                 }
 511         if(!bn_wexpand(modulus, m->top) || !bn_wexpand(exponent, p->top) ||
 512                 !bn_wexpand(argument, a->top) || !bn_wexpand(result, m->top))
 513                 {
 514                 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP,CSWIFT_R_BN_EXPAND_FAIL);
 515                 goto err;
 516                 }
 517         sw_param.type = SW_ALG_EXP;
 518         sw_param.up.exp.modulus.nbytes = BN_bn2bin(m,
 519                 (unsigned char *)modulus->d);
 520         sw_param.up.exp.modulus.value = (unsigned char *)modulus->d;
 521         sw_param.up.exp.exponent.nbytes = BN_bn2bin(p,
 522                 (unsigned char *)exponent->d);
 523         sw_param.up.exp.exponent.value = (unsigned char *)exponent->d;
 524         /* Attach the key params */
 525         sw_status = p_CSwift_AttachKeyParam(hac, &sw_param);
 526         switch(sw_status)
 527                 {
 528         case SW_OK:
 529                 break;
 530         case SW_ERR_INPUT_SIZE:
 531                 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP,CSWIFT_R_BAD_KEY_SIZE);
 532                 goto err;
 533         default:
 534                 {
 535                 char tmpbuf[DECIMAL_SIZE(sw_status)+1];
 536                 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP,CSWIFT_R_REQUEST_FAILED);
 537                 sprintf(tmpbuf, "%ld", sw_status);
 538                 ERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf);
 539                 }
 540                 goto err;
 541                 }
 542         /* Prepare the argument and response */
 543         arg.nbytes = BN_bn2bin(a, (unsigned char *)argument->d);
 544         arg.value = (unsigned char *)argument->d;
 545         res.nbytes = BN_num_bytes(m);
 546         memset(result->d, 0, res.nbytes);
 547         res.value = (unsigned char *)result->d;
 548         /* Perform the operation */
 549         if((sw_status = p_CSwift_SimpleRequest(hac, SW_CMD_MODEXP, &arg, 1,
 550                 &res, 1)) != SW_OK)
 551                 {
 552                 char tmpbuf[DECIMAL_SIZE(sw_status)+1];
 553                 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP,CSWIFT_R_REQUEST_FAILED);
 554                 sprintf(tmpbuf, "%ld", sw_status);
 555                 ERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf);
 556                 goto err;
 557                 }
 558         /* Convert the response */
 559         BN_bin2bn((unsigned char *)result->d, res.nbytes, r);
 560         to_return = 1;
 561 err:
 562         if(acquired)
 563                 release_context(hac);
 564         BN_CTX_end(ctx);
 565         return to_return;
 566         }
 567
 568 /* Un petit mod_exp chinois */
 569 static int cswift_mod_exp_crt(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
 570                         const BIGNUM *q, const BIGNUM *dmp1,
 571                         const BIGNUM *dmq1, const BIGNUM *iqmp, BN_CTX *ctx)
 572         {
 573         SW_STATUS sw_status;
 574         SW_LARGENUMBER arg, res;
 575         SW_PARAM sw_param;
 576         SW_CONTEXT_HANDLE hac;
 577         BIGNUM *rsa_p = NULL;
 578         BIGNUM *rsa_q = NULL;
 579         BIGNUM *rsa_dmp1 = NULL;
 580         BIGNUM *rsa_dmq1 = NULL;
 581         BIGNUM *rsa_iqmp = NULL;
 582         BIGNUM *argument = NULL;
 583         BIGNUM *result = NULL;
 584         int to_return = 0; /* expect failure */
 585         int acquired = 0;
 586
 587         if(!get_context(&hac))
 588                 {
 589                 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP_CRT,CSWIFT_R_UNIT_FAILURE);
 590                 goto err;
 591                 }
 592         acquired = 1;
 593         /* Prepare the params */
 594         BN_CTX_start(ctx);
 595         rsa_p = BN_CTX_get(ctx);
 596         rsa_q = BN_CTX_get(ctx);
 597         rsa_dmp1 = BN_CTX_get(ctx);
 598         rsa_dmq1 = BN_CTX_get(ctx);
 599         rsa_iqmp = BN_CTX_get(ctx);
 600         argument = BN_CTX_get(ctx);
 601         result = BN_CTX_get(ctx);
 602         if(!result)
 603                 {
 604                 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP_CRT,CSWIFT_R_BN_CTX_FULL);
 605                 goto err;
 606                 }
 607         if(!bn_wexpand(rsa_p, p->top) || !bn_wexpand(rsa_q, q->top) ||
 608                         !bn_wexpand(rsa_dmp1, dmp1->top) ||
 609                         !bn_wexpand(rsa_dmq1, dmq1->top) ||
 610                         !bn_wexpand(rsa_iqmp, iqmp->top) ||
 611                         !bn_wexpand(argument, a->top) ||
 612                         !bn_wexpand(result, p->top + q->top))
 613                 {
 614                 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP_CRT,CSWIFT_R_BN_EXPAND_FAIL);
 615                 goto err;
 616                 }
 617         sw_param.type = SW_ALG_CRT;
 618         sw_param.up.crt.p.nbytes = BN_bn2bin(p, (unsigned char *)rsa_p->d);
 619         sw_param.up.crt.p.value = (unsigned char *)rsa_p->d;
 620         sw_param.up.crt.q.nbytes = BN_bn2bin(q, (unsigned char *)rsa_q->d);
 621         sw_param.up.crt.q.value = (unsigned char *)rsa_q->d;
 622         sw_param.up.crt.dmp1.nbytes = BN_bn2bin(dmp1,
 623                 (unsigned char *)rsa_dmp1->d);
 624         sw_param.up.crt.dmp1.value = (unsigned char *)rsa_dmp1->d;
 625         sw_param.up.crt.dmq1.nbytes = BN_bn2bin(dmq1,
 626                 (unsigned char *)rsa_dmq1->d);
 627         sw_param.up.crt.dmq1.value = (unsigned char *)rsa_dmq1->d;
 628         sw_param.up.crt.iqmp.nbytes = BN_bn2bin(iqmp,
 629                 (unsigned char *)rsa_iqmp->d);
 630         sw_param.up.crt.iqmp.value = (unsigned char *)rsa_iqmp->d;
 631         /* Attach the key params */
 632         sw_status = p_CSwift_AttachKeyParam(hac, &sw_param);
 633         switch(sw_status)
 634                 {
 635         case SW_OK:
 636                 break;
 637         case SW_ERR_INPUT_SIZE:
 638                 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP_CRT,CSWIFT_R_BAD_KEY_SIZE);
 639                 goto err;
 640         default:
 641                 {
 642                 char tmpbuf[DECIMAL_SIZE(sw_status)+1];
 643                 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP_CRT,CSWIFT_R_REQUEST_FAILED);
 644                 sprintf(tmpbuf, "%ld", sw_status);
 645                 ERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf);
 646                 }
 647                 goto err;
 648                 }
 649         /* Prepare the argument and response */
 650         arg.nbytes = BN_bn2bin(a, (unsigned char *)argument->d);
 651         arg.value = (unsigned char *)argument->d;
 652         res.nbytes = 2 * BN_num_bytes(p);
 653         memset(result->d, 0, res.nbytes);
 654         res.value = (unsigned char *)result->d;
 655         /* Perform the operation */
 656         if((sw_status = p_CSwift_SimpleRequest(hac, SW_CMD_MODEXP_CRT, &arg, 1,
 657                 &res, 1)) != SW_OK)
 658                 {
 659                 char tmpbuf[DECIMAL_SIZE(sw_status)+1];
 660                 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP_CRT,CSWIFT_R_REQUEST_FAILED);
 661                 sprintf(tmpbuf, "%ld", sw_status);
 662                 ERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf);
 663                 goto err;
 664                 }
 665         /* Convert the response */
 666         BN_bin2bn((unsigned char *)result->d, res.nbytes, r);
 667         to_return = 1;
 668 err:
 669         if(acquired)
 670                 release_context(hac);
 671         BN_CTX_end(ctx);
 672         return to_return;
 673         }
 674
 675 #ifndef OPENSSL_NO_RSA
 676 static int cswift_rsa_mod_exp(BIGNUM *r0, const BIGNUM *I, RSA *rsa, BN_CTX *ctx)
 677         {
 678         int to_return = 0;
 679
 680         if(!rsa->p || !rsa->q || !rsa->dmp1 || !rsa->dmq1 || !rsa->iqmp)
 681                 {
 682                 CSWIFTerr(CSWIFT_F_CSWIFT_RSA_MOD_EXP,CSWIFT_R_MISSING_KEY_COMPONENTS);
 683                 goto err;
 684                 }
 685         to_return = cswift_mod_exp_crt(r0, I, rsa->p, rsa->q, rsa->dmp1,
 686                 rsa->dmq1, rsa->iqmp, ctx);
 687 err:
 688         return to_return;
 689         }
 690 #endif
 691
 692 /* This function is aliased to mod_exp (with the mont stuff dropped). */
 693 static int cswift_mod_exp_mont(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
 694                 const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx)
 695         {
 696         return cswift_mod_exp(r, a, p, m, ctx);
 697         }
 698
 699 #ifndef OPENSSL_NO_DSA
 700 static DSA_SIG *cswift_dsa_sign(const unsigned char *dgst, int dlen, DSA *dsa)
 701         {
 702         SW_CONTEXT_HANDLE hac;
 703         SW_PARAM sw_param;
 704         SW_STATUS sw_status;
 705         SW_LARGENUMBER arg, res;
 706         unsigned char *ptr;
 707         BN_CTX *ctx;
 708         BIGNUM *dsa_p = NULL;
 709         BIGNUM *dsa_q = NULL;
 710         BIGNUM *dsa_g = NULL;
 711         BIGNUM *dsa_key = NULL;
 712         BIGNUM *result = NULL;
 713         DSA_SIG *to_return = NULL;
 714         int acquired = 0;
 715
 716         if((ctx = BN_CTX_new()) == NULL)
 717                 goto err;
 718         if(!get_context(&hac))
 719                 {
 720                 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_SIGN,CSWIFT_R_UNIT_FAILURE);
 721                 goto err;
 722                 }
 723         acquired = 1;
 724         /* Prepare the params */
 725         BN_CTX_start(ctx);
 726         dsa_p = BN_CTX_get(ctx);
 727         dsa_q = BN_CTX_get(ctx);
 728         dsa_g = BN_CTX_get(ctx);
 729         dsa_key = BN_CTX_get(ctx);
 730         result = BN_CTX_get(ctx);
 731         if(!result)
 732                 {
 733                 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_SIGN,CSWIFT_R_BN_CTX_FULL);
 734                 goto err;
 735                 }
 736         if(!bn_wexpand(dsa_p, dsa->p->top) ||
 737                         !bn_wexpand(dsa_q, dsa->q->top) ||
 738                         !bn_wexpand(dsa_g, dsa->g->top) ||
 739                         !bn_wexpand(dsa_key, dsa->priv_key->top) ||
 740                         !bn_wexpand(result, dsa->p->top))
 741                 {
 742                 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_SIGN,CSWIFT_R_BN_EXPAND_FAIL);
 743                 goto err;
 744                 }
 745         sw_param.type = SW_ALG_DSA;
 746         sw_param.up.dsa.p.nbytes = BN_bn2bin(dsa->p,
 747                                 (unsigned char *)dsa_p->d);
 748         sw_param.up.dsa.p.value = (unsigned char *)dsa_p->d;
 749         sw_param.up.dsa.q.nbytes = BN_bn2bin(dsa->q,
 750                                 (unsigned char *)dsa_q->d);
 751         sw_param.up.dsa.q.value = (unsigned char *)dsa_q->d;
 752         sw_param.up.dsa.g.nbytes = BN_bn2bin(dsa->g,
 753                                 (unsigned char *)dsa_g->d);
 754         sw_param.up.dsa.g.value = (unsigned char *)dsa_g->d;
 755         sw_param.up.dsa.key.nbytes = BN_bn2bin(dsa->priv_key,
 756                                 (unsigned char *)dsa_key->d);
 757         sw_param.up.dsa.key.value = (unsigned char *)dsa_key->d;
 758         /* Attach the key params */
 759         sw_status = p_CSwift_AttachKeyParam(hac, &sw_param);
 760         switch(sw_status)
 761                 {
 762         case SW_OK:
 763                 break;
 764         case SW_ERR_INPUT_SIZE:
 765                 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_SIGN,CSWIFT_R_BAD_KEY_SIZE);
 766                 goto err;
 767         default:
 768                 {
 769                 char tmpbuf[DECIMAL_SIZE(sw_status)+1];
 770                 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_SIGN,CSWIFT_R_REQUEST_FAILED);
 771                 sprintf(tmpbuf, "%ld", sw_status);
 772                 ERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf);
 773                 }
 774                 goto err;
 775                 }
 776         /* Prepare the argument and response */
 777         arg.nbytes = dlen;
 778         arg.value = (unsigned char *)dgst;
 779         res.nbytes = BN_num_bytes(dsa->p);
 780         memset(result->d, 0, res.nbytes);
 781         res.value = (unsigned char *)result->d;
 782         /* Perform the operation */
 783         sw_status = p_CSwift_SimpleRequest(hac, SW_CMD_DSS_SIGN, &arg, 1,
 784                 &res, 1);
 785         if(sw_status != SW_OK)
 786                 {
 787                 char tmpbuf[DECIMAL_SIZE(sw_status)+1];
 788                 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_SIGN,CSWIFT_R_REQUEST_FAILED);
 789                 sprintf(tmpbuf, "%ld", sw_status);
 790                 ERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf);
 791                 goto err;
 792                 }
 793         /* Convert the response */
 794         ptr = (unsigned char *)result->d;
 795         if((to_return = DSA_SIG_new()) == NULL)
 796                 goto err;
 797         to_return->r = BN_bin2bn((unsigned char *)result->d, 20, NULL);
 798         to_return->s = BN_bin2bn((unsigned char *)result->d + 20, 20, NULL);
 799
 800 err:
 801         if(acquired)
 802                 release_context(hac);
 803         if(ctx)
 804                 {
 805                 BN_CTX_end(ctx);
 806                 BN_CTX_free(ctx);
 807                 }
 808         return to_return;
 809         }
 810
 811 static int cswift_dsa_verify(const unsigned char *dgst, int dgst_len,
 812                                 DSA_SIG *sig, DSA *dsa)
 813         {
 814         SW_CONTEXT_HANDLE hac;
 815         SW_PARAM sw_param;
 816         SW_STATUS sw_status;
 817         SW_LARGENUMBER arg[2], res;
 818         unsigned long sig_result;
 819         BN_CTX *ctx;
 820         BIGNUM *dsa_p = NULL;
 821         BIGNUM *dsa_q = NULL;
 822         BIGNUM *dsa_g = NULL;
 823         BIGNUM *dsa_key = NULL;
 824         BIGNUM *argument = NULL;
 825         int to_return = -1;
 826         int acquired = 0;
 827
 828         if((ctx = BN_CTX_new()) == NULL)
 829                 goto err;
 830         if(!get_context(&hac))
 831                 {
 832                 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_VERIFY,CSWIFT_R_UNIT_FAILURE);
 833                 goto err;
 834                 }
 835         acquired = 1;
 836         /* Prepare the params */
 837         BN_CTX_start(ctx);
 838         dsa_p = BN_CTX_get(ctx);
 839         dsa_q = BN_CTX_get(ctx);
 840         dsa_g = BN_CTX_get(ctx);
 841         dsa_key = BN_CTX_get(ctx);
 842         argument = BN_CTX_get(ctx);
 843         if(!argument)
 844                 {
 845                 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_VERIFY,CSWIFT_R_BN_CTX_FULL);
 846                 goto err;
 847                 }
 848         if(!bn_wexpand(dsa_p, dsa->p->top) ||
 849                         !bn_wexpand(dsa_q, dsa->q->top) ||
 850                         !bn_wexpand(dsa_g, dsa->g->top) ||
 851                         !bn_wexpand(dsa_key, dsa->pub_key->top) ||
 852                         !bn_wexpand(argument, 40))
 853                 {
 854                 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_VERIFY,CSWIFT_R_BN_EXPAND_FAIL);
 855                 goto err;
 856                 }
 857         sw_param.type = SW_ALG_DSA;
 858         sw_param.up.dsa.p.nbytes = BN_bn2bin(dsa->p,
 859                                 (unsigned char *)dsa_p->d);
 860         sw_param.up.dsa.p.value = (unsigned char *)dsa_p->d;
 861         sw_param.up.dsa.q.nbytes = BN_bn2bin(dsa->q,
 862                                 (unsigned char *)dsa_q->d);
 863         sw_param.up.dsa.q.value = (unsigned char *)dsa_q->d;
 864         sw_param.up.dsa.g.nbytes = BN_bn2bin(dsa->g,
 865                                 (unsigned char *)dsa_g->d);
 866         sw_param.up.dsa.g.value = (unsigned char *)dsa_g->d;
 867         sw_param.up.dsa.key.nbytes = BN_bn2bin(dsa->pub_key,
 868                                 (unsigned char *)dsa_key->d);
 869         sw_param.up.dsa.key.value = (unsigned char *)dsa_key->d;
 870         /* Attach the key params */
 871         sw_status = p_CSwift_AttachKeyParam(hac, &sw_param);
 872         switch(sw_status)
 873                 {
 874         case SW_OK:
 875                 break;
 876         case SW_ERR_INPUT_SIZE:
 877                 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_VERIFY,CSWIFT_R_BAD_KEY_SIZE);
 878                 goto err;
 879         default:
 880                 {
 881                 char tmpbuf[DECIMAL_SIZE(sw_status)+1];
 882                 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_VERIFY,CSWIFT_R_REQUEST_FAILED);
 883                 sprintf(tmpbuf, "%ld", sw_status);
 884                 ERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf);
 885                 }
 886                 goto err;
 887                 }
 888         /* Prepare the argument and response */
 889         arg[0].nbytes = dgst_len;
 890         arg[0].value = (unsigned char *)dgst;
 891         arg[1].nbytes = 40;
 892         arg[1].value = (unsigned char *)argument->d;
 893         memset(arg[1].value, 0, 40);
 894         BN_bn2bin(sig->r, arg[1].value + 20 - BN_num_bytes(sig->r));
 895         BN_bn2bin(sig->s, arg[1].value + 40 - BN_num_bytes(sig->s));
 896         res.nbytes = 4; /* unsigned long */
 897         res.value = (unsigned char *)(&sig_result);
 898         /* Perform the operation */
 899         sw_status = p_CSwift_SimpleRequest(hac, SW_CMD_DSS_VERIFY, arg, 2,
 900                 &res, 1);
 901         if(sw_status != SW_OK)
 902                 {
 903                 char tmpbuf[DECIMAL_SIZE(sw_status)+1];
 904                 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_VERIFY,CSWIFT_R_REQUEST_FAILED);
 905                 sprintf(tmpbuf, "%ld", sw_status);
 906                 ERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf);
 907                 goto err;
 908                 }
 909         /* Convert the response */
 910         to_return = ((sig_result == 0) ? 0 : 1);
 911
 912 err:
 913         if(acquired)
 914                 release_context(hac);
 915         if(ctx)
 916                 {
 917                 BN_CTX_end(ctx);
 918                 BN_CTX_free(ctx);
 919                 }
 920         return to_return;
 921         }
 922 #endif
 923
 924 #ifndef OPENSSL_NO_DH
 925 /* This function is aliased to mod_exp (with the dh and mont dropped). */
 926 static int cswift_mod_exp_dh(const DH *dh, BIGNUM *r,
 927                 const BIGNUM *a, const BIGNUM *p,
 928                 const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx)
 929         {
 930         return cswift_mod_exp(r, a, p, m, ctx);
 931         }
 932 #endif
 933
 934 /* Random bytes are good */
 935 static int cswift_rand_bytes(unsigned char *buf, int num)
 936 {
 937         SW_CONTEXT_HANDLE hac;
 938         SW_STATUS swrc;
 939         SW_LARGENUMBER largenum;
 940         size_t nbytes = 0;
 941         int acquired = 0;
 942         int to_return = 0; /* assume failure */
 943
 944         if (!get_context(&hac))
 945         {
 946                 CSWIFTerr(CSWIFT_F_CSWIFT_CTRL, CSWIFT_R_UNIT_FAILURE);
 947                 goto err;
 948         }
 949         acquired = 1;
 950
 951         while (nbytes < (size_t)num)
 952         {
 953                 /* tell CryptoSwift how many bytes we want and where we want it.
 954                  * Note: - CryptoSwift cannot do more than 4096 bytes at a time.
 955                  *       - CryptoSwift can only do multiple of 32-bits. */
 956                 largenum.value = (SW_BYTE *) buf + nbytes;
 957                 if (4096 > num - nbytes)
 958                         largenum.nbytes = num - nbytes;
 959                 else
 960                         largenum.nbytes = 4096;
 961
 962                 swrc = p_CSwift_SimpleRequest(hac, SW_CMD_RAND, NULL, 0, &largenum, 1);
 963                 if (swrc != SW_OK)
 964                 {
 965                         char tmpbuf[20];
 966                         CSWIFTerr(CSWIFT_F_CSWIFT_CTRL, CSWIFT_R_REQUEST_FAILED);
 967                         sprintf(tmpbuf, "%ld", swrc);
 968                         ERR_add_error_data(2, "CryptoSwift error number is ", tmpbuf);
 969                         goto err;
 970                 }
 971
 972                 nbytes += largenum.nbytes;
 973         }
 974         to_return = 1;  /* success */
 975
 976 err:
 977         if (acquired)
 978                 release_context(hac);
 979         return to_return;
 980 }
 981
 982 static int cswift_rand_status(void)
 983 {
 984         return 1;
 985 }
 986
 987
 988 /* This stuff is needed if this ENGINE is being compiled into a self-contained
 989  * shared-library. */
 990 #ifndef OPENSSL_NO_DYNAMIC_ENGINE
 991 static int bind_fn(ENGINE *e, const char *id)
 992         {
 993         if(id && (strcmp(id, engine_cswift_id) != 0))
 994                 return 0;
 995         if(!bind_helper(e))
 996                 return 0;
 997         return 1;
 998         }
 999 IMPLEMENT_DYNAMIC_CHECK_FN()
1000 IMPLEMENT_DYNAMIC_BIND_FN(bind_fn)
1001 #endif /* OPENSSL_NO_DYNAMIC_ENGINE */
1002
1003 #endif /* !OPENSSL_NO_HW_CSWIFT */
1004 #endif /* !OPENSSL_NO_HW */