crypto/openssl/engines/e_aep.c

   1 /* ====================================================================
   2  * Copyright (c) 1999 The OpenSSL Project.  All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions
   6  * are met:
   7  *
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  *
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in
  13  *    the documentation and/or other materials provided with the
  14  *    distribution.
  15  *
  16  * 3. All advertising materials mentioning features or use of this
  17  *    software must display the following acknowledgment:
  18  *    "This product includes software developed by the OpenSSL Project
  19  *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
  20  *
  21  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  22  *    endorse or promote products derived from this software without
  23  *    prior written permission. For written permission, please contact
  24  *    licensing@OpenSSL.org.
  25  *
  26  * 5. Products derived from this software may not be called "OpenSSL"
  27  *    nor may "OpenSSL" appear in their names without prior written
  28  *    permission of the OpenSSL Project.
  29  *
  30  * 6. Redistributions of any form whatsoever must retain the following
  31  *    acknowledgment:
  32  *    "This product includes software developed by the OpenSSL Project
  33  *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
  34  *
  35  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  36  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  37  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  38  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  39  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  40  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  41  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  42  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  43  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  44  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  45  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  46  * OF THE POSSIBILITY OF SUCH DAMAGE.
  47  * ====================================================================
  48  *
  49  * This product includes cryptographic software written by Eric Young
  50  * (eay@cryptsoft.com).  This product includes software written by Tim
  51  * Hudson (tjh@cryptsoft.com).
  52  *
  53  */
  54
  55 #include <stdio.h>
  56 #include <openssl/bn.h>
  57 #include <string.h>
  58
  59 #include <openssl/e_os2.h>
  60 #if !defined(OPENSSL_SYS_MSDOS) || defined(__DJGPP__)
  61 #include <sys/types.h>
  62 #include <unistd.h>
  63 #else
  64 #include <process.h>
  65 typedef int pid_t;
  66 #endif
  67
  68 #include <openssl/crypto.h>
  69 #include <openssl/dso.h>
  70 #include <openssl/engine.h>
  71 #include <openssl/buffer.h>
  72 #ifndef OPENSSL_NO_RSA
  73 #include <openssl/rsa.h>
  74 #endif
  75 #ifndef OPENSSL_NO_DSA
  76 #include <openssl/dsa.h>
  77 #endif
  78 #ifndef OPENSSL_NO_DH
  79 #include <openssl/dh.h>
  80 #endif
  81 #include <openssl/bn.h>
  82
  83 #ifndef OPENSSL_NO_HW
  84 #ifndef OPENSSL_NO_HW_AEP
  85 #ifdef FLAT_INC
  86 #include "aep.h"
  87 #else
  88 #include "vendor_defns/aep.h"
  89 #endif
  90
  91 #define AEP_LIB_NAME "aep engine"
  92 #define FAIL_TO_SW 0x10101010
  93
  94 #include "e_aep_err.c"
  95
  96 static int aep_init(ENGINE *e);
  97 static int aep_finish(ENGINE *e);
  98 static int aep_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f)(void));
  99 static int aep_destroy(ENGINE *e);
 100
 101 static AEP_RV aep_get_connection(AEP_CONNECTION_HNDL_PTR hConnection);
 102 static AEP_RV aep_return_connection(AEP_CONNECTION_HNDL hConnection);
 103 static AEP_RV aep_close_connection(AEP_CONNECTION_HNDL hConnection);
 104 static AEP_RV aep_close_all_connections(int use_engine_lock, int *in_use);
 105
 106 /* BIGNUM stuff */
 107 #ifndef OPENSSL_NO_RSA
 108 static int aep_mod_exp(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
 109         const BIGNUM *m, BN_CTX *ctx);
 110
 111 static AEP_RV aep_mod_exp_crt(BIGNUM *r,const  BIGNUM *a, const BIGNUM *p,
 112         const BIGNUM *q, const BIGNUM *dmp1,const BIGNUM *dmq1,
 113         const BIGNUM *iqmp, BN_CTX *ctx);
 114 #endif
 115
 116 /* RSA stuff */
 117 #ifndef OPENSSL_NO_RSA
 118 static int aep_rsa_mod_exp(BIGNUM *r0, const BIGNUM *I, RSA *rsa, BN_CTX *ctx);
 119 #endif
 120
 121 /* This function is aliased to mod_exp (with the mont stuff dropped). */
 122 #ifndef OPENSSL_NO_RSA
 123 static int aep_mod_exp_mont(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
 124         const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx);
 125 #endif
 126
 127 /* DSA stuff */
 128 #ifndef OPENSSL_NO_DSA
 129 static int aep_dsa_mod_exp(DSA *dsa, BIGNUM *rr, BIGNUM *a1,
 130         BIGNUM *p1, BIGNUM *a2, BIGNUM *p2, BIGNUM *m,
 131         BN_CTX *ctx, BN_MONT_CTX *in_mont);
 132
 133 static int aep_mod_exp_dsa(DSA *dsa, BIGNUM *r, BIGNUM *a,
 134         const BIGNUM *p, const BIGNUM *m, BN_CTX *ctx,
 135         BN_MONT_CTX *m_ctx);
 136 #endif
 137
 138 /* DH stuff */
 139 /* This function is aliased to mod_exp (with the DH and mont dropped). */
 140 #ifndef OPENSSL_NO_DH
 141 static int aep_mod_exp_dh(const DH *dh, BIGNUM *r, const BIGNUM *a,
 142         const BIGNUM *p, const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx);
 143 #endif
 144
 145 /* rand stuff   */
 146 #ifdef AEPRAND
 147 static int aep_rand(unsigned char *buf, int num);
 148 static int aep_rand_status(void);
 149 #endif
 150
 151 /* Bignum conversion stuff */
 152 static AEP_RV GetBigNumSize(AEP_VOID_PTR ArbBigNum, AEP_U32* BigNumSize);
 153 static AEP_RV MakeAEPBigNum(AEP_VOID_PTR ArbBigNum, AEP_U32 BigNumSize,
 154         unsigned char* AEP_BigNum);
 155 static AEP_RV ConvertAEPBigNum(void* ArbBigNum, AEP_U32 BigNumSize,
 156         unsigned char* AEP_BigNum);
 157
 158 /* The definitions for control commands specific to this engine */
 159 #define AEP_CMD_SO_PATH         ENGINE_CMD_BASE
 160 static const ENGINE_CMD_DEFN aep_cmd_defns[] =
 161         {
 162         { AEP_CMD_SO_PATH,
 163           "SO_PATH",
 164           "Specifies the path to the 'aep' shared library",
 165           ENGINE_CMD_FLAG_STRING
 166         },
 167         {0, NULL, NULL, 0}
 168         };
 169
 170 #ifndef OPENSSL_NO_RSA
 171 /* Our internal RSA_METHOD that we provide pointers to */
 172 static RSA_METHOD aep_rsa =
 173         {
 174         "Aep RSA method",
 175         NULL,                /*rsa_pub_encrypt*/
 176         NULL,                /*rsa_pub_decrypt*/
 177         NULL,                /*rsa_priv_encrypt*/
 178         NULL,                /*rsa_priv_encrypt*/
 179         aep_rsa_mod_exp,     /*rsa_mod_exp*/
 180         aep_mod_exp_mont,    /*bn_mod_exp*/
 181         NULL,                /*init*/
 182         NULL,                /*finish*/
 183         0,                   /*flags*/
 184         NULL,                /*app_data*/
 185         NULL,                /*rsa_sign*/
 186         NULL,                /*rsa_verify*/
 187         NULL                 /*rsa_keygen*/
 188         };
 189 #endif
 190
 191 #ifndef OPENSSL_NO_DSA
 192 /* Our internal DSA_METHOD that we provide pointers to */
 193 static DSA_METHOD aep_dsa =
 194         {
 195         "Aep DSA method",
 196         NULL,                /* dsa_do_sign */
 197         NULL,                /* dsa_sign_setup */
 198         NULL,                /* dsa_do_verify */
 199         aep_dsa_mod_exp,     /* dsa_mod_exp */
 200         aep_mod_exp_dsa,     /* bn_mod_exp */
 201         NULL,                /* init */
 202         NULL,                /* finish */
 203         0,                   /* flags */
 204         NULL,                /* app_data */
 205         NULL,                /* dsa_paramgen */
 206         NULL                 /* dsa_keygen */
 207         };
 208 #endif
 209
 210 #ifndef OPENSSL_NO_DH
 211 /* Our internal DH_METHOD that we provide pointers to */
 212 static DH_METHOD aep_dh =
 213         {
 214         "Aep DH method",
 215         NULL,
 216         NULL,
 217         aep_mod_exp_dh,
 218         NULL,
 219         NULL,
 220         0,
 221         NULL,
 222         NULL
 223         };
 224 #endif
 225
 226 #ifdef AEPRAND
 227 /* our internal RAND_method that we provide pointers to  */
 228 static RAND_METHOD aep_random =
 229         {
 230         /*"AEP RAND method", */
 231         NULL,
 232         aep_rand,
 233         NULL,
 234         NULL,
 235         aep_rand,
 236         aep_rand_status,
 237         };
 238 #endif
 239
 240 /*Define an array of structures to hold connections*/
 241 static AEP_CONNECTION_ENTRY aep_app_conn_table[MAX_PROCESS_CONNECTIONS];
 242
 243 /*Used to determine if this is a new process*/
 244 static pid_t    recorded_pid = 0;
 245
 246 #ifdef AEPRAND
 247 static AEP_U8   rand_block[RAND_BLK_SIZE];
 248 static AEP_U32  rand_block_bytes = 0;
 249 #endif
 250
 251 /* Constants used when creating the ENGINE */
 252 static const char *engine_aep_id = "aep";
 253 static const char *engine_aep_name = "Aep hardware engine support";
 254
 255 static int max_key_len = 2176;
 256
 257
 258 /* This internal function is used by ENGINE_aep() and possibly by the
 259  * "dynamic" ENGINE support too */
 260 static int bind_aep(ENGINE *e)
 261         {
 262 #ifndef OPENSSL_NO_RSA
 263         const RSA_METHOD  *meth1;
 264 #endif
 265 #ifndef OPENSSL_NO_DSA
 266         const DSA_METHOD  *meth2;
 267 #endif
 268 #ifndef OPENSSL_NO_DH
 269         const DH_METHOD   *meth3;
 270 #endif
 271
 272         if(!ENGINE_set_id(e, engine_aep_id) ||
 273                 !ENGINE_set_name(e, engine_aep_name) ||
 274 #ifndef OPENSSL_NO_RSA
 275                 !ENGINE_set_RSA(e, &aep_rsa) ||
 276 #endif
 277 #ifndef OPENSSL_NO_DSA
 278                 !ENGINE_set_DSA(e, &aep_dsa) ||
 279 #endif
 280 #ifndef OPENSSL_NO_DH
 281                 !ENGINE_set_DH(e, &aep_dh) ||
 282 #endif
 283 #ifdef AEPRAND
 284                 !ENGINE_set_RAND(e, &aep_random) ||
 285 #endif
 286                 !ENGINE_set_init_function(e, aep_init) ||
 287                 !ENGINE_set_destroy_function(e, aep_destroy) ||
 288                 !ENGINE_set_finish_function(e, aep_finish) ||
 289                 !ENGINE_set_ctrl_function(e, aep_ctrl) ||
 290                 !ENGINE_set_cmd_defns(e, aep_cmd_defns))
 291                 return 0;
 292
 293 #ifndef OPENSSL_NO_RSA
 294         /* We know that the "PKCS1_SSLeay()" functions hook properly
 295          * to the aep-specific mod_exp and mod_exp_crt so we use
 296          * those functions. NB: We don't use ENGINE_openssl() or
 297          * anything "more generic" because something like the RSAref
 298          * code may not hook properly, and if you own one of these
 299          * cards then you have the right to do RSA operations on it
 300          * anyway! */
 301         meth1 = RSA_PKCS1_SSLeay();
 302         aep_rsa.rsa_pub_enc = meth1->rsa_pub_enc;
 303         aep_rsa.rsa_pub_dec = meth1->rsa_pub_dec;
 304         aep_rsa.rsa_priv_enc = meth1->rsa_priv_enc;
 305         aep_rsa.rsa_priv_dec = meth1->rsa_priv_dec;
 306 #endif
 307
 308
 309 #ifndef OPENSSL_NO_DSA
 310         /* Use the DSA_OpenSSL() method and just hook the mod_exp-ish
 311          * bits. */
 312         meth2 = DSA_OpenSSL();
 313         aep_dsa.dsa_do_sign    = meth2->dsa_do_sign;
 314         aep_dsa.dsa_sign_setup = meth2->dsa_sign_setup;
 315         aep_dsa.dsa_do_verify  = meth2->dsa_do_verify;
 316
 317         aep_dsa = *DSA_get_default_method();
 318         aep_dsa.dsa_mod_exp = aep_dsa_mod_exp;
 319         aep_dsa.bn_mod_exp = aep_mod_exp_dsa;
 320 #endif
 321
 322 #ifndef OPENSSL_NO_DH
 323         /* Much the same for Diffie-Hellman */
 324         meth3 = DH_OpenSSL();
 325         aep_dh.generate_key = meth3->generate_key;
 326         aep_dh.compute_key  = meth3->compute_key;
 327         aep_dh.bn_mod_exp   = meth3->bn_mod_exp;
 328 #endif
 329
 330         /* Ensure the aep error handling is set up */
 331         ERR_load_AEPHK_strings();
 332
 333         return 1;
 334 }
 335
 336 #ifndef OPENSSL_NO_DYNAMIC_ENGINE
 337 static int bind_helper(ENGINE *e, const char *id)
 338         {
 339         if(id && (strcmp(id, engine_aep_id) != 0))
 340                 return 0;
 341         if(!bind_aep(e))
 342                 return 0;
 343         return 1;
 344         }
 345 IMPLEMENT_DYNAMIC_CHECK_FN()
 346 IMPLEMENT_DYNAMIC_BIND_FN(bind_helper)
 347 #else
 348 static ENGINE *engine_aep(void)
 349         {
 350         ENGINE *ret = ENGINE_new();
 351         if(!ret)
 352                 return NULL;
 353         if(!bind_aep(ret))
 354                 {
 355                 ENGINE_free(ret);
 356                 return NULL;
 357                 }
 358         return ret;
 359         }
 360
 361 void ENGINE_load_aep(void)
 362         {
 363         /* Copied from eng_[openssl|dyn].c */
 364         ENGINE *toadd = engine_aep();
 365         if(!toadd) return;
 366         ENGINE_add(toadd);
 367         ENGINE_free(toadd);
 368         ERR_clear_error();
 369         }
 370 #endif
 371
 372 /* This is a process-global DSO handle used for loading and unloading
 373  * the Aep library. NB: This is only set (or unset) during an
 374  * init() or finish() call (reference counts permitting) and they're
 375  * operating with global locks, so this should be thread-safe
 376  * implicitly. */
 377 static DSO *aep_dso = NULL;
 378
 379 /* These are the static string constants for the DSO file name and the function
 380  * symbol names to bind to.
 381 */
 382 static const char *AEP_LIBNAME = NULL;
 383 static const char *get_AEP_LIBNAME(void)
 384         {
 385         if(AEP_LIBNAME)
 386                 return AEP_LIBNAME;
 387         return "aep";
 388         }
 389 static void free_AEP_LIBNAME(void)
 390         {
 391         if(AEP_LIBNAME)
 392                 OPENSSL_free((void*)AEP_LIBNAME);
 393         AEP_LIBNAME = NULL;
 394         }
 395 static long set_AEP_LIBNAME(const char *name)
 396         {
 397         free_AEP_LIBNAME();
 398         return ((AEP_LIBNAME = BUF_strdup(name)) != NULL ? 1 : 0);
 399         }
 400
 401 static const char *AEP_F1    = "AEP_ModExp";
 402 static const char *AEP_F2    = "AEP_ModExpCrt";
 403 #ifdef AEPRAND
 404 static const char *AEP_F3    = "AEP_GenRandom";
 405 #endif
 406 static const char *AEP_F4    = "AEP_Finalize";
 407 static const char *AEP_F5    = "AEP_Initialize";
 408 static const char *AEP_F6    = "AEP_OpenConnection";
 409 static const char *AEP_F7    = "AEP_SetBNCallBacks";
 410 static const char *AEP_F8    = "AEP_CloseConnection";
 411
 412 /* These are the function pointers that are (un)set when the library has
 413  * successfully (un)loaded. */
 414 static t_AEP_OpenConnection    *p_AEP_OpenConnection  = NULL;
 415 static t_AEP_CloseConnection   *p_AEP_CloseConnection = NULL;
 416 static t_AEP_ModExp            *p_AEP_ModExp          = NULL;
 417 static t_AEP_ModExpCrt         *p_AEP_ModExpCrt       = NULL;
 418 #ifdef AEPRAND
 419 static t_AEP_GenRandom         *p_AEP_GenRandom       = NULL;
 420 #endif
 421 static t_AEP_Initialize        *p_AEP_Initialize      = NULL;
 422 static t_AEP_Finalize          *p_AEP_Finalize        = NULL;
 423 static t_AEP_SetBNCallBacks    *p_AEP_SetBNCallBacks  = NULL;
 424
 425 /* (de)initialisation functions. */
 426 static int aep_init(ENGINE *e)
 427         {
 428         t_AEP_ModExp          *p1;
 429         t_AEP_ModExpCrt       *p2;
 430 #ifdef AEPRAND
 431         t_AEP_GenRandom       *p3;
 432 #endif
 433         t_AEP_Finalize        *p4;
 434         t_AEP_Initialize      *p5;
 435         t_AEP_OpenConnection  *p6;
 436         t_AEP_SetBNCallBacks  *p7;
 437         t_AEP_CloseConnection *p8;
 438
 439         int to_return = 0;
 440
 441         if(aep_dso != NULL)
 442                 {
 443                 AEPHKerr(AEPHK_F_AEP_INIT,AEPHK_R_ALREADY_LOADED);
 444                 goto err;
 445                 }
 446         /* Attempt to load libaep.so. */
 447
 448         aep_dso = DSO_load(NULL, get_AEP_LIBNAME(), NULL, 0);
 449
 450         if(aep_dso == NULL)
 451                 {
 452                 AEPHKerr(AEPHK_F_AEP_INIT,AEPHK_R_NOT_LOADED);
 453                 goto err;
 454                 }
 455
 456         if(     !(p1 = (t_AEP_ModExp *)     DSO_bind_func( aep_dso,AEP_F1))  ||
 457                 !(p2 = (t_AEP_ModExpCrt*)   DSO_bind_func( aep_dso,AEP_F2))  ||
 458 #ifdef AEPRAND
 459                 !(p3 = (t_AEP_GenRandom*)   DSO_bind_func( aep_dso,AEP_F3))  ||
 460 #endif
 461                 !(p4 = (t_AEP_Finalize*)    DSO_bind_func( aep_dso,AEP_F4))  ||
 462                 !(p5 = (t_AEP_Initialize*)  DSO_bind_func( aep_dso,AEP_F5))  ||
 463                 !(p6 = (t_AEP_OpenConnection*) DSO_bind_func( aep_dso,AEP_F6))  ||
 464                 !(p7 = (t_AEP_SetBNCallBacks*) DSO_bind_func( aep_dso,AEP_F7))  ||
 465                 !(p8 = (t_AEP_CloseConnection*) DSO_bind_func( aep_dso,AEP_F8)))
 466                 {
 467                 AEPHKerr(AEPHK_F_AEP_INIT,AEPHK_R_NOT_LOADED);
 468                 goto err;
 469                 }
 470
 471         /* Copy the pointers */
 472
 473         p_AEP_ModExp           = p1;
 474         p_AEP_ModExpCrt        = p2;
 475 #ifdef AEPRAND
 476         p_AEP_GenRandom        = p3;
 477 #endif
 478         p_AEP_Finalize         = p4;
 479         p_AEP_Initialize       = p5;
 480         p_AEP_OpenConnection   = p6;
 481         p_AEP_SetBNCallBacks   = p7;
 482         p_AEP_CloseConnection  = p8;
 483
 484         to_return = 1;
 485
 486         return to_return;
 487
 488  err:
 489
 490         if(aep_dso)
 491                 DSO_free(aep_dso);
 492         aep_dso = NULL;
 493
 494         p_AEP_OpenConnection    = NULL;
 495         p_AEP_ModExp            = NULL;
 496         p_AEP_ModExpCrt         = NULL;
 497 #ifdef AEPRAND
 498         p_AEP_GenRandom         = NULL;
 499 #endif
 500         p_AEP_Initialize        = NULL;
 501         p_AEP_Finalize          = NULL;
 502         p_AEP_SetBNCallBacks    = NULL;
 503         p_AEP_CloseConnection   = NULL;
 504
 505         return to_return;
 506         }
 507
 508 /* Destructor (complements the "ENGINE_aep()" constructor) */
 509 static int aep_destroy(ENGINE *e)
 510         {
 511         free_AEP_LIBNAME();
 512         ERR_unload_AEPHK_strings();
 513         return 1;
 514         }
 515
 516 static int aep_finish(ENGINE *e)
 517         {
 518         int to_return = 0, in_use;
 519         AEP_RV rv;
 520
 521         if(aep_dso == NULL)
 522                 {
 523                 AEPHKerr(AEPHK_F_AEP_FINISH,AEPHK_R_NOT_LOADED);
 524                 goto err;
 525                 }
 526
 527         rv = aep_close_all_connections(0, &in_use);
 528         if (rv != AEP_R_OK)
 529                 {
 530                 AEPHKerr(AEPHK_F_AEP_FINISH,AEPHK_R_CLOSE_HANDLES_FAILED);
 531                 goto err;
 532                 }
 533         if (in_use)
 534                 {
 535                 AEPHKerr(AEPHK_F_AEP_FINISH,AEPHK_R_CONNECTIONS_IN_USE);
 536                 goto err;
 537                 }
 538
 539         rv = p_AEP_Finalize();
 540         if (rv != AEP_R_OK)
 541                 {
 542                 AEPHKerr(AEPHK_F_AEP_FINISH,AEPHK_R_FINALIZE_FAILED);
 543                 goto err;
 544                 }
 545
 546         if(!DSO_free(aep_dso))
 547                 {
 548                 AEPHKerr(AEPHK_F_AEP_FINISH,AEPHK_R_UNIT_FAILURE);
 549                 goto err;
 550                 }
 551
 552         aep_dso = NULL;
 553         p_AEP_CloseConnection   = NULL;
 554         p_AEP_OpenConnection    = NULL;
 555         p_AEP_ModExp            = NULL;
 556         p_AEP_ModExpCrt         = NULL;
 557 #ifdef AEPRAND
 558         p_AEP_GenRandom         = NULL;
 559 #endif
 560         p_AEP_Initialize        = NULL;
 561         p_AEP_Finalize          = NULL;
 562         p_AEP_SetBNCallBacks    = NULL;
 563
 564         to_return = 1;
 565  err:
 566         return to_return;
 567         }
 568
 569 static int aep_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f)(void))
 570         {
 571         int initialised = ((aep_dso == NULL) ? 0 : 1);
 572         switch(cmd)
 573                 {
 574         case AEP_CMD_SO_PATH:
 575                 if(p == NULL)
 576                         {
 577                         AEPHKerr(AEPHK_F_AEP_CTRL,
 578                                 ERR_R_PASSED_NULL_PARAMETER);
 579                         return 0;
 580                         }
 581                 if(initialised)
 582                         {
 583                         AEPHKerr(AEPHK_F_AEP_CTRL,
 584                                 AEPHK_R_ALREADY_LOADED);
 585                         return 0;
 586                         }
 587                 return set_AEP_LIBNAME((const char*)p);
 588         default:
 589                 break;
 590                 }
 591         AEPHKerr(AEPHK_F_AEP_CTRL,AEPHK_R_CTRL_COMMAND_NOT_IMPLEMENTED);
 592         return 0;
 593         }
 594
 595 static int aep_mod_exp(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
 596         const BIGNUM *m, BN_CTX *ctx)
 597         {
 598         int to_return = 0;
 599         int     r_len = 0;
 600         AEP_CONNECTION_HNDL hConnection;
 601         AEP_RV rv;
 602
 603         r_len = BN_num_bits(m);
 604
 605         /* Perform in software if modulus is too large for hardware. */
 606
 607         if (r_len > max_key_len){
 608                 AEPHKerr(AEPHK_F_AEP_MOD_EXP, AEPHK_R_SIZE_TOO_LARGE_OR_TOO_SMALL);
 609                 return BN_mod_exp(r, a, p, m, ctx);
 610         }
 611
 612         /*Grab a connection from the pool*/
 613         rv = aep_get_connection(&hConnection);
 614         if (rv != AEP_R_OK)
 615                 {
 616                 AEPHKerr(AEPHK_F_AEP_MOD_EXP,AEPHK_R_GET_HANDLE_FAILED);
 617                 return BN_mod_exp(r, a, p, m, ctx);
 618                 }
 619
 620         /*To the card with the mod exp*/
 621         rv = p_AEP_ModExp(hConnection,(void*)a, (void*)p,(void*)m, (void*)r,NULL);
 622
 623         if (rv !=  AEP_R_OK)
 624                 {
 625                 AEPHKerr(AEPHK_F_AEP_MOD_EXP,AEPHK_R_MOD_EXP_FAILED);
 626                 rv = aep_close_connection(hConnection);
 627                 return BN_mod_exp(r, a, p, m, ctx);
 628                 }
 629
 630         /*Return the connection to the pool*/
 631         rv = aep_return_connection(hConnection);
 632         if (rv != AEP_R_OK)
 633                 {
 634                 AEPHKerr(AEPHK_F_AEP_MOD_EXP,AEPHK_R_RETURN_CONNECTION_FAILED);
 635                 goto err;
 636                 }
 637
 638         to_return = 1;
 639  err:
 640         return to_return;
 641         }
 642
 643 #ifndef OPENSSL_NO_RSA
 644 static AEP_RV aep_mod_exp_crt(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
 645         const BIGNUM *q, const BIGNUM *dmp1,
 646         const BIGNUM *dmq1,const BIGNUM *iqmp, BN_CTX *ctx)
 647         {
 648         AEP_RV rv = AEP_R_OK;
 649         AEP_CONNECTION_HNDL hConnection;
 650
 651         /*Grab a connection from the pool*/
 652         rv = aep_get_connection(&hConnection);
 653         if (rv != AEP_R_OK)
 654                 {
 655                 AEPHKerr(AEPHK_F_AEP_MOD_EXP_CRT,AEPHK_R_GET_HANDLE_FAILED);
 656                 return FAIL_TO_SW;
 657                 }
 658
 659         /*To the card with the mod exp*/
 660         rv = p_AEP_ModExpCrt(hConnection,(void*)a, (void*)p, (void*)q, (void*)dmp1,(void*)dmq1,
 661                 (void*)iqmp,(void*)r,NULL);
 662         if (rv != AEP_R_OK)
 663                 {
 664                 AEPHKerr(AEPHK_F_AEP_MOD_EXP_CRT,AEPHK_R_MOD_EXP_CRT_FAILED);
 665                 rv = aep_close_connection(hConnection);
 666                 return FAIL_TO_SW;
 667                 }
 668
 669         /*Return the connection to the pool*/
 670         rv = aep_return_connection(hConnection);
 671         if (rv != AEP_R_OK)
 672                 {
 673                 AEPHKerr(AEPHK_F_AEP_MOD_EXP_CRT,AEPHK_R_RETURN_CONNECTION_FAILED);
 674                 goto err;
 675                 }
 676
 677  err:
 678         return rv;
 679         }
 680 #endif
 681
 682
 683 #ifdef AEPRAND
 684 static int aep_rand(unsigned char *buf,int len )
 685         {
 686         AEP_RV rv = AEP_R_OK;
 687         AEP_CONNECTION_HNDL hConnection;
 688
 689         CRYPTO_w_lock(CRYPTO_LOCK_RAND);
 690
 691         /*Can the request be serviced with what's already in the buffer?*/
 692         if (len <= rand_block_bytes)
 693                 {
 694                 memcpy(buf, &rand_block[RAND_BLK_SIZE - rand_block_bytes], len);
 695                 rand_block_bytes -= len;
 696                 CRYPTO_w_unlock(CRYPTO_LOCK_RAND);
 697                 }
 698         else
 699                 /*If not the get another block of random bytes*/
 700                 {
 701                 CRYPTO_w_unlock(CRYPTO_LOCK_RAND);
 702
 703                 rv = aep_get_connection(&hConnection);
 704                 if (rv !=  AEP_R_OK)
 705                         {
 706                         AEPHKerr(AEPHK_F_AEP_RAND,AEPHK_R_GET_HANDLE_FAILED);
 707                         goto err_nounlock;
 708                         }
 709
 710                 if (len > RAND_BLK_SIZE)
 711                         {
 712                         rv = p_AEP_GenRandom(hConnection, len, 2, buf, NULL);
 713                         if (rv !=  AEP_R_OK)
 714                                 {
 715                                 AEPHKerr(AEPHK_F_AEP_RAND,AEPHK_R_GET_RANDOM_FAILED);
 716                                 goto err_nounlock;
 717                                 }
 718                         }
 719                 else
 720                         {
 721                         CRYPTO_w_lock(CRYPTO_LOCK_RAND);
 722
 723                         rv = p_AEP_GenRandom(hConnection, RAND_BLK_SIZE, 2, &rand_block[0], NULL);
 724                         if (rv !=  AEP_R_OK)
 725                                 {
 726                                 AEPHKerr(AEPHK_F_AEP_RAND,AEPHK_R_GET_RANDOM_FAILED);
 727
 728                                 goto err;
 729                                 }
 730
 731                         rand_block_bytes = RAND_BLK_SIZE;
 732
 733                         memcpy(buf, &rand_block[RAND_BLK_SIZE - rand_block_bytes], len);
 734                         rand_block_bytes -= len;
 735
 736                         CRYPTO_w_unlock(CRYPTO_LOCK_RAND);
 737                         }
 738
 739                 rv = aep_return_connection(hConnection);
 740                 if (rv != AEP_R_OK)
 741                         {
 742                         AEPHKerr(AEPHK_F_AEP_RAND,AEPHK_R_RETURN_CONNECTION_FAILED);
 743
 744                         goto err_nounlock;
 745                         }
 746                 }
 747
 748         return 1;
 749  err:
 750         CRYPTO_w_unlock(CRYPTO_LOCK_RAND);
 751  err_nounlock:
 752         return 0;
 753         }
 754
 755 static int aep_rand_status(void)
 756 {
 757         return 1;
 758 }
 759 #endif
 760
 761 #ifndef OPENSSL_NO_RSA
 762 static int aep_rsa_mod_exp(BIGNUM *r0, const BIGNUM *I, RSA *rsa, BN_CTX *ctx)
 763         {
 764         int to_return = 0;
 765         AEP_RV rv = AEP_R_OK;
 766
 767         if (!aep_dso)
 768                 {
 769                 AEPHKerr(AEPHK_F_AEP_RSA_MOD_EXP,AEPHK_R_NOT_LOADED);
 770                 goto err;
 771                 }
 772
 773         /*See if we have all the necessary bits for a crt*/
 774         if (rsa->q && rsa->dmp1 && rsa->dmq1 && rsa->iqmp)
 775                 {
 776                 rv =  aep_mod_exp_crt(r0,I,rsa->p,rsa->q, rsa->dmp1,rsa->dmq1,rsa->iqmp,ctx);
 777
 778                 if (rv == FAIL_TO_SW){
 779                         const RSA_METHOD *meth = RSA_PKCS1_SSLeay();
 780                         to_return = (*meth->rsa_mod_exp)(r0, I, rsa, ctx);
 781                         goto err;
 782                 }
 783                 else if (rv != AEP_R_OK)
 784                         goto err;
 785                 }
 786         else
 787                 {
 788                 if (!rsa->d || !rsa->n)
 789                         {
 790                         AEPHKerr(AEPHK_F_AEP_RSA_MOD_EXP,AEPHK_R_MISSING_KEY_COMPONENTS);
 791                         goto err;
 792                         }
 793
 794                 rv = aep_mod_exp(r0,I,rsa->d,rsa->n,ctx);
 795                 if  (rv != AEP_R_OK)
 796                         goto err;
 797
 798                 }
 799
 800         to_return = 1;
 801
 802  err:
 803         return to_return;
 804 }
 805 #endif
 806
 807 #ifndef OPENSSL_NO_DSA
 808 static int aep_dsa_mod_exp(DSA *dsa, BIGNUM *rr, BIGNUM *a1,
 809         BIGNUM *p1, BIGNUM *a2, BIGNUM *p2, BIGNUM *m,
 810         BN_CTX *ctx, BN_MONT_CTX *in_mont)
 811         {
 812         BIGNUM t;
 813         int to_return = 0;
 814         BN_init(&t);
 815
 816         /* let rr = a1 ^ p1 mod m */
 817         if (!aep_mod_exp(rr,a1,p1,m,ctx)) goto end;
 818         /* let t = a2 ^ p2 mod m */
 819         if (!aep_mod_exp(&t,a2,p2,m,ctx)) goto end;
 820         /* let rr = rr * t mod m */
 821         if (!BN_mod_mul(rr,rr,&t,m,ctx)) goto end;
 822         to_return = 1;
 823  end:
 824         BN_free(&t);
 825         return to_return;
 826         }
 827
 828 static int aep_mod_exp_dsa(DSA *dsa, BIGNUM *r, BIGNUM *a,
 829         const BIGNUM *p, const BIGNUM *m, BN_CTX *ctx,
 830         BN_MONT_CTX *m_ctx)
 831         {
 832         return aep_mod_exp(r, a, p, m, ctx);
 833         }
 834 #endif
 835
 836 #ifndef OPENSSL_NO_RSA
 837 /* This function is aliased to mod_exp (with the mont stuff dropped). */
 838 static int aep_mod_exp_mont(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
 839         const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx)
 840         {
 841         return aep_mod_exp(r, a, p, m, ctx);
 842         }
 843 #endif
 844
 845 #ifndef OPENSSL_NO_DH
 846 /* This function is aliased to mod_exp (with the dh and mont dropped). */
 847 static int aep_mod_exp_dh(const DH *dh, BIGNUM *r, const BIGNUM *a,
 848         const BIGNUM *p, const BIGNUM *m, BN_CTX *ctx,
 849         BN_MONT_CTX *m_ctx)
 850         {
 851         return aep_mod_exp(r, a, p, m, ctx);
 852         }
 853 #endif
 854
 855 static AEP_RV aep_get_connection(AEP_CONNECTION_HNDL_PTR phConnection)
 856         {
 857         int count;
 858         AEP_RV rv = AEP_R_OK;
 859
 860         /*Get the current process id*/
 861         pid_t curr_pid;
 862
 863         CRYPTO_w_lock(CRYPTO_LOCK_ENGINE);
 864
 865 #ifndef NETWARE_CLIB
 866         curr_pid = getpid();
 867 #else
 868         curr_pid = GetThreadID();
 869 #endif
 870
 871         /*Check if this is the first time this is being called from the current
 872           process*/
 873         if (recorded_pid != curr_pid)
 874                 {
 875                 /*Remember our pid so we can check if we're in a new process*/
 876                 recorded_pid = curr_pid;
 877
 878                 /*Call Finalize to make sure we have not inherited some data
 879                   from a parent process*/
 880                 p_AEP_Finalize();
 881
 882                 /*Initialise the AEP API*/
 883                 rv = p_AEP_Initialize(NULL);
 884
 885                 if (rv != AEP_R_OK)
 886                         {
 887                         AEPHKerr(AEPHK_F_AEP_GET_CONNECTION,AEPHK_R_INIT_FAILURE);
 888                         recorded_pid = 0;
 889                         goto end;
 890                         }
 891
 892                 /*Set the AEP big num call back functions*/
 893                 rv = p_AEP_SetBNCallBacks(&GetBigNumSize, &MakeAEPBigNum,
 894                         &ConvertAEPBigNum);
 895
 896                 if (rv != AEP_R_OK)
 897                         {
 898                         AEPHKerr(AEPHK_F_AEP_GET_CONNECTION,AEPHK_R_SETBNCALLBACK_FAILURE);
 899                         recorded_pid = 0;
 900                         goto end;
 901                         }
 902
 903 #ifdef AEPRAND
 904                 /*Reset the rand byte count*/
 905                 rand_block_bytes = 0;
 906 #endif
 907
 908                 /*Init the structures*/
 909                 for (count = 0;count < MAX_PROCESS_CONNECTIONS;count ++)
 910                         {
 911                         aep_app_conn_table[count].conn_state = NotConnected;
 912                         aep_app_conn_table[count].conn_hndl  = 0;
 913                         }
 914
 915                 /*Open a connection*/
 916                 rv = p_AEP_OpenConnection(phConnection);
 917
 918                 if (rv != AEP_R_OK)
 919                         {
 920                         AEPHKerr(AEPHK_F_AEP_GET_CONNECTION,AEPHK_R_UNIT_FAILURE);
 921                         recorded_pid = 0;
 922                         goto end;
 923                         }
 924
 925                 aep_app_conn_table[0].conn_state = InUse;
 926                 aep_app_conn_table[0].conn_hndl = *phConnection;
 927                 goto end;
 928                 }
 929         /*Check the existing connections to see if we can find a free one*/
 930         for (count = 0;count < MAX_PROCESS_CONNECTIONS;count ++)
 931                 {
 932                 if (aep_app_conn_table[count].conn_state == Connected)
 933                         {
 934                         aep_app_conn_table[count].conn_state = InUse;
 935                         *phConnection = aep_app_conn_table[count].conn_hndl;
 936                         goto end;
 937                         }
 938                 }
 939         /*If no connections available, we're going to have to try
 940           to open a new one*/
 941         for (count = 0;count < MAX_PROCESS_CONNECTIONS;count ++)
 942                 {
 943                 if (aep_app_conn_table[count].conn_state == NotConnected)
 944                         {
 945                         /*Open a connection*/
 946                         rv = p_AEP_OpenConnection(phConnection);
 947
 948                         if (rv != AEP_R_OK)
 949                                 {
 950                                 AEPHKerr(AEPHK_F_AEP_GET_CONNECTION,AEPHK_R_UNIT_FAILURE);
 951                                 goto end;
 952                                 }
 953
 954                         aep_app_conn_table[count].conn_state = InUse;
 955                         aep_app_conn_table[count].conn_hndl = *phConnection;
 956                         goto end;
 957                         }
 958                 }
 959         rv = AEP_R_GENERAL_ERROR;
 960  end:
 961         CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE);
 962         return rv;
 963         }
 964
 965
 966 static AEP_RV aep_return_connection(AEP_CONNECTION_HNDL hConnection)
 967         {
 968         int count;
 969
 970         CRYPTO_w_lock(CRYPTO_LOCK_ENGINE);
 971
 972         /*Find the connection item that matches this connection handle*/
 973         for(count = 0;count < MAX_PROCESS_CONNECTIONS;count ++)
 974                 {
 975                 if (aep_app_conn_table[count].conn_hndl == hConnection)
 976                         {
 977                         aep_app_conn_table[count].conn_state = Connected;
 978                         break;
 979                         }
 980                 }
 981
 982         CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE);
 983
 984         return AEP_R_OK;
 985         }
 986
 987 static AEP_RV aep_close_connection(AEP_CONNECTION_HNDL hConnection)
 988         {
 989         int count;
 990         AEP_RV rv = AEP_R_OK;
 991
 992         CRYPTO_w_lock(CRYPTO_LOCK_ENGINE);
 993
 994         /*Find the connection item that matches this connection handle*/
 995         for(count = 0;count < MAX_PROCESS_CONNECTIONS;count ++)
 996                 {
 997                 if (aep_app_conn_table[count].conn_hndl == hConnection)
 998                         {
 999                         rv = p_AEP_CloseConnection(aep_app_conn_table[count].conn_hndl);
1000                         if (rv != AEP_R_OK)
1001                                 goto end;
1002                         aep_app_conn_table[count].conn_state = NotConnected;
1003                         aep_app_conn_table[count].conn_hndl  = 0;
1004                         break;
1005                         }
1006                 }
1007
1008  end:
1009         CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE);
1010         return rv;
1011         }
1012
1013 static AEP_RV aep_close_all_connections(int use_engine_lock, int *in_use)
1014         {
1015         int count;
1016         AEP_RV rv = AEP_R_OK;
1017
1018         *in_use = 0;
1019         if (use_engine_lock) CRYPTO_w_lock(CRYPTO_LOCK_ENGINE);
1020         for (count = 0;count < MAX_PROCESS_CONNECTIONS;count ++)
1021                 {
1022                 switch (aep_app_conn_table[count].conn_state)
1023                         {
1024                 case Connected:
1025                         rv = p_AEP_CloseConnection(aep_app_conn_table[count].conn_hndl);
1026                         if (rv != AEP_R_OK)
1027                                 goto end;
1028                         aep_app_conn_table[count].conn_state = NotConnected;
1029                         aep_app_conn_table[count].conn_hndl  = 0;
1030                         break;
1031                 case InUse:
1032                         (*in_use)++;
1033                         break;
1034                 case NotConnected:
1035                         break;
1036                         }
1037                 }
1038  end:
1039         if (use_engine_lock) CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE);
1040         return rv;
1041         }
1042
1043 /*BigNum call back functions, used to convert OpenSSL bignums into AEP bignums.
1044   Note only 32bit Openssl build support*/
1045
1046 static AEP_RV GetBigNumSize(AEP_VOID_PTR ArbBigNum, AEP_U32* BigNumSize)
1047         {
1048         BIGNUM* bn;
1049
1050         /*Cast the ArbBigNum pointer to our BIGNUM struct*/
1051         bn = (BIGNUM*) ArbBigNum;
1052
1053 #ifdef SIXTY_FOUR_BIT_LONG
1054         *BigNumSize = bn->top << 3;
1055 #else
1056         /*Size of the bignum in bytes is equal to the bn->top (no of 32 bit
1057           words) multiplies by 4*/
1058         *BigNumSize = bn->top << 2;
1059 #endif
1060
1061         return AEP_R_OK;
1062         }
1063
1064 static AEP_RV MakeAEPBigNum(AEP_VOID_PTR ArbBigNum, AEP_U32 BigNumSize,
1065         unsigned char* AEP_BigNum)
1066         {
1067         BIGNUM* bn;
1068
1069 #ifndef SIXTY_FOUR_BIT_LONG
1070         unsigned char* buf;
1071         int i;
1072 #endif
1073
1074         /*Cast the ArbBigNum pointer to our BIGNUM struct*/
1075         bn = (BIGNUM*) ArbBigNum;
1076
1077 #ifdef SIXTY_FOUR_BIT_LONG
1078         memcpy(AEP_BigNum, bn->d, BigNumSize);
1079 #else
1080         /*Must copy data into a (monotone) least significant byte first format
1081           performing endian conversion if necessary*/
1082         for(i=0;i<bn->top;i++)
1083                 {
1084                 buf = (unsigned char*)&bn->d[i];
1085
1086                 *((AEP_U32*)AEP_BigNum) = (AEP_U32)
1087                         ((unsigned) buf[1] << 8 | buf[0]) |
1088                         ((unsigned) buf[3] << 8 | buf[2])  << 16;
1089
1090                 AEP_BigNum += 4;
1091                 }
1092 #endif
1093
1094         return AEP_R_OK;
1095         }
1096
1097 /*Turn an AEP Big Num back to a user big num*/
1098 static AEP_RV ConvertAEPBigNum(void* ArbBigNum, AEP_U32 BigNumSize,
1099         unsigned char* AEP_BigNum)
1100         {
1101         BIGNUM* bn;
1102 #ifndef SIXTY_FOUR_BIT_LONG
1103         int i;
1104 #endif
1105
1106         bn = (BIGNUM*)ArbBigNum;
1107
1108         /*Expand the result bn so that it can hold our big num.
1109           Size is in bits*/
1110         bn_expand(bn, (int)(BigNumSize << 3));
1111
1112 #ifdef SIXTY_FOUR_BIT_LONG
1113         bn->top = BigNumSize >> 3;
1114
1115         if((BigNumSize & 7) != 0)
1116                 bn->top++;
1117
1118         memset(bn->d, 0, bn->top << 3);
1119
1120         memcpy(bn->d, AEP_BigNum, BigNumSize);
1121 #else
1122         bn->top = BigNumSize >> 2;
1123
1124         for(i=0;i<bn->top;i++)
1125                 {
1126                 bn->d[i] = (AEP_U32)
1127                         ((unsigned) AEP_BigNum[3] << 8 | AEP_BigNum[2]) << 16 |
1128                         ((unsigned) AEP_BigNum[1] << 8 | AEP_BigNum[0]);
1129                 AEP_BigNum += 4;
1130                 }
1131 #endif
1132
1133         return AEP_R_OK;
1134 }
1135
1136 #endif /* !OPENSSL_NO_HW_AEP */
1137 #endif /* !OPENSSL_NO_HW */