crypto/engine/hw_ubsec.c

   1 /* crypto/engine/hw_ubsec.c */
   2 /* Written by Geoff Thorpe (geoff@geoffthorpe.net) for the OpenSSL
   3  * project 2000.
   4  *
   5  * Cloned shamelessly by Joe Tardo.
   6  */
   7 /* ====================================================================
   8  * Copyright (c) 1999-2001 The OpenSSL Project.  All rights reserved.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  *
  14  * 1. Redistributions of source code must retain the above copyright
  15  *    notice, this list of conditions and the following disclaimer.
  16  *
  17  * 2. Redistributions in binary form must reproduce the above copyright
  18  *    notice, this list of conditions and the following disclaimer in
  19  *    the documentation and/or other materials provided with the
  20  *    distribution.
  21  *
  22  * 3. All advertising materials mentioning features or use of this
  23  *    software must display the following acknowledgment:
  24  *    "This product includes software developed by the OpenSSL Project
  25  *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
  26  *
  27  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  28  *    endorse or promote products derived from this software without
  29  *    prior written permission. For written permission, please contact
  30  *    licensing@OpenSSL.org.
  31  *
  32  * 5. Products derived from this software may not be called "OpenSSL"
  33  *    nor may "OpenSSL" appear in their names without prior written
  34  *    permission of the OpenSSL Project.
  35  *
  36  * 6. Redistributions of any form whatsoever must retain the following
  37  *    acknowledgment:
  38  *    "This product includes software developed by the OpenSSL Project
  39  *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
  40  *
  41  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  42  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  43  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  44  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  45  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  46  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  47  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  48  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  49  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  50  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  51  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  52  * OF THE POSSIBILITY OF SUCH DAMAGE.
  53  * ====================================================================
  54  *
  55  * This product includes cryptographic software written by Eric Young
  56  * (eay@cryptsoft.com).  This product includes software written by Tim
  57  * Hudson (tjh@cryptsoft.com).
  58  *
  59  */
  60
  61 #include <stdio.h>
  62 #include <openssl/crypto.h>
  63 #include "cryptlib.h"
  64 #include <openssl/dso.h>
  65 #include <openssl/engine.h>
  66
  67 #ifndef OPENSSL_NO_HW
  68 #ifndef OPENSSL_NO_HW_UBSEC
  69
  70 #ifdef FLAT_INC
  71 #include "hw_ubsec.h"
  72 #else
  73 #include "vendor_defns/hw_ubsec.h"
  74 #endif
  75
  76 #define FAIL_TO_SOFTWARE -15
  77
  78 static int ubsec_destroy(ENGINE *e);
  79 static int ubsec_init(ENGINE *e);
  80 static int ubsec_finish(ENGINE *e);
  81 static int ubsec_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f)());
  82 static int ubsec_mod_exp(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
  83                 const BIGNUM *m, BN_CTX *ctx);
  84 static int ubsec_mod_exp_crt(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
  85                         const BIGNUM *q, const BIGNUM *dp,
  86                         const BIGNUM *dq, const BIGNUM *qinv, BN_CTX *ctx);
  87 #ifndef OPENSSL_NO_RSA
  88 static int ubsec_rsa_mod_exp(BIGNUM *r0, const BIGNUM *I, RSA *rsa);
  89 #endif
  90 static int ubsec_mod_exp_mont(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
  91                 const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx);
  92 #ifndef OPENSSL_NO_DSA
  93 #if NOT_USED
  94 static int ubsec_dsa_mod_exp(DSA *dsa, BIGNUM *rr, BIGNUM *a1,
  95                 BIGNUM *p1, BIGNUM *a2, BIGNUM *p2, BIGNUM *m,
  96                 BN_CTX *ctx, BN_MONT_CTX *in_mont);
  97 static int ubsec_mod_exp_dsa(DSA *dsa, BIGNUM *r, BIGNUM *a,
  98                 const BIGNUM *p, const BIGNUM *m, BN_CTX *ctx,
  99                 BN_MONT_CTX *m_ctx);
 100 #endif
 101 static DSA_SIG *ubsec_dsa_do_sign(const unsigned char *dgst, int dlen, DSA *dsa);
 102 static int ubsec_dsa_verify(const unsigned char *dgst, int dgst_len,
 103                                 DSA_SIG *sig, DSA *dsa);
 104 #endif
 105 #ifndef OPENSSL_NO_DH
 106 static int ubsec_mod_exp_dh(const DH *dh, BIGNUM *r, const BIGNUM *a,
 107                 const BIGNUM *p, const BIGNUM *m, BN_CTX *ctx,
 108                 BN_MONT_CTX *m_ctx);
 109 static int ubsec_dh_compute_key(unsigned char *key,const BIGNUM *pub_key,DH *dh);
 110 static int ubsec_dh_generate_key(DH *dh);
 111 #endif
 112
 113 #if NOT_USED
 114 static int ubsec_rand_bytes(unsigned char *buf, int num);
 115 static int ubsec_rand_status(void);
 116 #endif
 117
 118 #define UBSEC_CMD_SO_PATH               ENGINE_CMD_BASE
 119 static const ENGINE_CMD_DEFN ubsec_cmd_defns[] = {
 120         {UBSEC_CMD_SO_PATH,
 121                 "SO_PATH",
 122                 "Specifies the path to the 'ubsec' shared library",
 123                 ENGINE_CMD_FLAG_STRING},
 124         {0, NULL, NULL, 0}
 125         };
 126
 127 #ifndef OPENSSL_NO_RSA
 128 /* Our internal RSA_METHOD that we provide pointers to */
 129 static RSA_METHOD ubsec_rsa =
 130         {
 131         "UBSEC RSA method",
 132         NULL,
 133         NULL,
 134         NULL,
 135         NULL,
 136         ubsec_rsa_mod_exp,
 137         ubsec_mod_exp_mont,
 138         NULL,
 139         NULL,
 140         0,
 141         NULL,
 142         NULL,
 143         NULL
 144         };
 145 #endif
 146
 147 #ifndef OPENSSL_NO_DSA
 148 /* Our internal DSA_METHOD that we provide pointers to */
 149 static DSA_METHOD ubsec_dsa =
 150         {
 151         "UBSEC DSA method",
 152         ubsec_dsa_do_sign, /* dsa_do_sign */
 153         NULL, /* dsa_sign_setup */
 154         ubsec_dsa_verify, /* dsa_do_verify */
 155         NULL, /* ubsec_dsa_mod_exp */ /* dsa_mod_exp */
 156         NULL, /* ubsec_mod_exp_dsa */ /* bn_mod_exp */
 157         NULL, /* init */
 158         NULL, /* finish */
 159         0, /* flags */
 160         NULL /* app_data */
 161         };
 162 #endif
 163
 164 #ifndef OPENSSL_NO_DH
 165 /* Our internal DH_METHOD that we provide pointers to */
 166 static DH_METHOD ubsec_dh =
 167         {
 168         "UBSEC DH method",
 169         ubsec_dh_generate_key,
 170         ubsec_dh_compute_key,
 171         ubsec_mod_exp_dh,
 172         NULL,
 173         NULL,
 174         0,
 175         NULL
 176         };
 177 #endif
 178
 179 #ifndef OPENSSL_NO_ERR
 180 /* Error function codes for use in ubsec operation */
 181 #define UBSEC_F_UBSEC_INIT                      100
 182 #define UBSEC_F_UBSEC_FINISH                    101
 183 #define UBSEC_F_UBSEC_CTRL                      102
 184 #define UBSEC_F_UBSEC_MOD_EXP                   103
 185 #define UBSEC_F_UBSEC_RSA_MOD_EXP               104
 186 #define UBSEC_F_UBSEC_RSA_MOD_EXP_CRT           105
 187 #define UBSEC_F_UBSEC_DSA_SIGN                  106
 188 #define UBSEC_F_UBSEC_DSA_VERIFY                107
 189 #define UBSEC_F_UBSEC_DH_COMPUTE_KEY            117
 190 /* Error reason codes */
 191 #define UBSEC_R_ALREADY_LOADED                  108
 192 #define UBSEC_R_DSO_FAILURE                     109
 193 #define UBSEC_R_UNIT_FAILURE                    110
 194 #define UBSEC_R_NOT_LOADED                      111
 195 #define UBSEC_R_CTRL_COMMAND_NOT_IMPLEMENTED    112
 196 #define UBSEC_R_SIZE_TOO_LARGE_OR_TOO_SMALL     113
 197 #define UBSEC_R_BN_EXPAND_FAIL                  114
 198 #define UBSEC_R_REQUEST_FAILED                  115
 199 #define UBSEC_R_MISSING_KEY_COMPONENTS          116
 200
 201 static ERR_STRING_DATA ubsec_str_functs[] =
 202         {
 203         /* This first element is changed to match the dynamic 'lib' number */
 204 {ERR_PACK(0,0,0),                               "ubsec engine code"},
 205 {ERR_PACK(0,UBSEC_F_UBSEC_INIT,0),              "ubsec_init"},
 206 {ERR_PACK(0,UBSEC_F_UBSEC_FINISH,0),            "ubsec_finish"},
 207 {ERR_PACK(0,UBSEC_F_UBSEC_CTRL,0),              "ubsec_ctrl"},
 208 {ERR_PACK(0,UBSEC_F_UBSEC_MOD_EXP,0),           "ubsec_mod_exp"},
 209 {ERR_PACK(0,UBSEC_F_UBSEC_RSA_MOD_EXP,0),       "ubsec_rsa_mod_exp"},
 210 {ERR_PACK(0,UBSEC_F_UBSEC_RSA_MOD_EXP_CRT,0),   "ubsec_rsa_mod_exp_crt"},
 211 {ERR_PACK(0,UBSEC_F_UBSEC_DSA_SIGN,0),          "ubsec_dsa_sign"},
 212 {ERR_PACK(0,UBSEC_F_UBSEC_DSA_VERIFY,0),        "ubsec_dsa_verify"},
 213 /* Error reason codes */
 214 {UBSEC_R_ALREADY_LOADED                 ,"already loaded"},
 215 {UBSEC_R_DSO_FAILURE                    ,"DSO failure"},
 216 {UBSEC_R_UNIT_FAILURE                   ,"unit failure"},
 217 {UBSEC_R_NOT_LOADED                     ,"not loaded"},
 218 {UBSEC_R_CTRL_COMMAND_NOT_IMPLEMENTED   ,"ctrl command not implemented"},
 219 {UBSEC_R_SIZE_TOO_LARGE_OR_TOO_SMALL    ,"size too large or too small"},
 220 {UBSEC_R_BN_EXPAND_FAIL                 ,"bn_expand fail"},
 221 {UBSEC_R_REQUEST_FAILED                 ,"request failed"},
 222 {UBSEC_R_MISSING_KEY_COMPONENTS         ,"missing key components"},
 223 {0,NULL}
 224         };
 225 /* The library number we obtain dynamically from the ERR code */
 226 static int ubsec_err_lib = -1;
 227 #define UBSECerr(f,r) ERR_PUT_error(ubsec_err_lib,(f),(r),__FILE__,__LINE__)
 228 static void ubsec_load_error_strings(void)
 229         {
 230         if(ubsec_err_lib < 0)
 231                 {
 232                 if((ubsec_err_lib = ERR_get_next_error_library()) <= 0)
 233                         return;
 234                 ubsec_str_functs[0].error = ERR_PACK(ubsec_err_lib,0,0);
 235                 ERR_load_strings(ubsec_err_lib, ubsec_str_functs);
 236                 }
 237         }
 238 static void ubsec_unload_error_strings(void)
 239         {
 240         if(ubsec_err_lib >= 0)
 241                 {
 242                 ERR_unload_strings(ubsec_err_lib, ubsec_str_functs);
 243                 ubsec_err_lib = -1;
 244                 }
 245         }
 246 #else
 247 #define UBSECerr(f,r)                                   /* NOP */
 248 static void ubsec_load_error_strings(void) { }          /* NOP */
 249 static void ubsec_unload_error_strings(void) { }        /* NOP */
 250 #endif
 251
 252 /* Constants used when creating the ENGINE */
 253 static const char *engine_ubsec_id = "ubsec";
 254 static const char *engine_ubsec_name = "UBSEC hardware engine support";
 255
 256 /* This internal function is used by ENGINE_ubsec() and possibly by the
 257  * "dynamic" ENGINE support too */
 258 static int bind_helper(ENGINE *e)
 259         {
 260 #ifndef OPENSSL_NO_RSA
 261         const RSA_METHOD *meth1;
 262 #endif
 263 #ifndef OPENSSL_NO_DH
 264 #ifndef HAVE_UBSEC_DH
 265         const DH_METHOD *meth3;
 266 #endif /* HAVE_UBSEC_DH */
 267 #endif
 268         if(!ENGINE_set_id(e, engine_ubsec_id) ||
 269                         !ENGINE_set_name(e, engine_ubsec_name) ||
 270 #ifndef OPENSSL_NO_RSA
 271                         !ENGINE_set_RSA(e, &ubsec_rsa) ||
 272 #endif
 273 #ifndef OPENSSL_NO_DSA
 274                         !ENGINE_set_DSA(e, &ubsec_dsa) ||
 275 #endif
 276 #ifndef OPENSSL_NO_DH
 277                         !ENGINE_set_DH(e, &ubsec_dh) ||
 278 #endif
 279                         !ENGINE_set_destroy_function(e, ubsec_destroy) ||
 280                         !ENGINE_set_init_function(e, ubsec_init) ||
 281                         !ENGINE_set_finish_function(e, ubsec_finish) ||
 282                         !ENGINE_set_ctrl_function(e, ubsec_ctrl) ||
 283                         !ENGINE_set_cmd_defns(e, ubsec_cmd_defns))
 284                 return 0;
 285
 286 #ifndef OPENSSL_NO_RSA
 287         /* We know that the "PKCS1_SSLeay()" functions hook properly
 288          * to the Broadcom-specific mod_exp and mod_exp_crt so we use
 289          * those functions. NB: We don't use ENGINE_openssl() or
 290          * anything "more generic" because something like the RSAref
 291          * code may not hook properly, and if you own one of these
 292          * cards then you have the right to do RSA operations on it
 293          * anyway! */
 294         meth1 = RSA_PKCS1_SSLeay();
 295         ubsec_rsa.rsa_pub_enc = meth1->rsa_pub_enc;
 296         ubsec_rsa.rsa_pub_dec = meth1->rsa_pub_dec;
 297         ubsec_rsa.rsa_priv_enc = meth1->rsa_priv_enc;
 298         ubsec_rsa.rsa_priv_dec = meth1->rsa_priv_dec;
 299 #endif
 300
 301 #ifndef OPENSSL_NO_DH
 302 #ifndef HAVE_UBSEC_DH
 303         /* Much the same for Diffie-Hellman */
 304         meth3 = DH_OpenSSL();
 305         ubsec_dh.generate_key = meth3->generate_key;
 306         ubsec_dh.compute_key = meth3->compute_key;
 307 #endif /* HAVE_UBSEC_DH */
 308 #endif
 309
 310         /* Ensure the ubsec error handling is set up */
 311         ubsec_load_error_strings();
 312         return 1;
 313         }
 314
 315 static ENGINE *engine_ubsec(void)
 316         {
 317         ENGINE *ret = ENGINE_new();
 318         if(!ret)
 319                 return NULL;
 320         if(!bind_helper(ret))
 321                 {
 322                 ENGINE_free(ret);
 323                 return NULL;
 324                 }
 325         return ret;
 326         }
 327
 328 void ENGINE_load_ubsec(void)
 329         {
 330         /* Copied from eng_[openssl|dyn].c */
 331         ENGINE *toadd = engine_ubsec();
 332         if(!toadd) return;
 333         ENGINE_add(toadd);
 334         ENGINE_free(toadd);
 335         ERR_clear_error();
 336         }
 337
 338 /* This is a process-global DSO handle used for loading and unloading
 339  * the UBSEC library. NB: This is only set (or unset) during an
 340  * init() or finish() call (reference counts permitting) and they're
 341  * operating with global locks, so this should be thread-safe
 342  * implicitly. */
 343
 344 static DSO *ubsec_dso = NULL;
 345
 346 /* These are the function pointers that are (un)set when the library has
 347  * successfully (un)loaded. */
 348
 349 static t_UBSEC_ubsec_bytes_to_bits *p_UBSEC_ubsec_bytes_to_bits = NULL;
 350 static t_UBSEC_ubsec_bits_to_bytes *p_UBSEC_ubsec_bits_to_bytes = NULL;
 351 static t_UBSEC_ubsec_open *p_UBSEC_ubsec_open = NULL;
 352 static t_UBSEC_ubsec_close *p_UBSEC_ubsec_close = NULL;
 353 #ifndef OPENSSL_NO_DH
 354 static t_UBSEC_diffie_hellman_generate_ioctl
 355         *p_UBSEC_diffie_hellman_generate_ioctl = NULL;
 356 static t_UBSEC_diffie_hellman_agree_ioctl *p_UBSEC_diffie_hellman_agree_ioctl = NULL;
 357 #endif
 358 /* #ifndef OPENSSL_NO_RSA */
 359 static t_UBSEC_rsa_mod_exp_ioctl *p_UBSEC_rsa_mod_exp_ioctl = NULL;
 360 static t_UBSEC_rsa_mod_exp_crt_ioctl *p_UBSEC_rsa_mod_exp_crt_ioctl = NULL;
 361 /* #endif */
 362 #ifndef OPENSSL_NO_DSA
 363 static t_UBSEC_dsa_sign_ioctl *p_UBSEC_dsa_sign_ioctl = NULL;
 364 static t_UBSEC_dsa_verify_ioctl *p_UBSEC_dsa_verify_ioctl = NULL;
 365 #endif
 366 static t_UBSEC_math_accelerate_ioctl *p_UBSEC_math_accelerate_ioctl = NULL;
 367 static t_UBSEC_rng_ioctl *p_UBSEC_rng_ioctl = NULL;
 368 static t_UBSEC_max_key_len_ioctl *p_UBSEC_max_key_len_ioctl = NULL;
 369
 370 static int max_key_len = 1024;  /* ??? */
 371
 372 /*
 373  * These are the static string constants for the DSO file name and the function
 374  * symbol names to bind to.
 375  */
 376
 377 static const char *UBSEC_LIBNAME = "ubsec";
 378 static const char *UBSEC_F1 = "ubsec_bytes_to_bits";
 379 static const char *UBSEC_F2 = "ubsec_bits_to_bytes";
 380 static const char *UBSEC_F3 = "ubsec_open";
 381 static const char *UBSEC_F4 = "ubsec_close";
 382 #ifndef OPENSSL_NO_DH
 383 static const char *UBSEC_F5 = "diffie_hellman_generate_ioctl";
 384 static const char *UBSEC_F6 = "diffie_hellman_agree_ioctl";
 385 #endif
 386 /* #ifndef OPENSSL_NO_RSA */
 387 static const char *UBSEC_F7 = "rsa_mod_exp_ioctl";
 388 static const char *UBSEC_F8 = "rsa_mod_exp_crt_ioctl";
 389 /* #endif */
 390 #ifndef OPENSSL_NO_DSA
 391 static const char *UBSEC_F9 = "dsa_sign_ioctl";
 392 static const char *UBSEC_F10 = "dsa_verify_ioctl";
 393 #endif
 394 static const char *UBSEC_F11 = "math_accelerate_ioctl";
 395 static const char *UBSEC_F12 = "rng_ioctl";
 396 static const char *UBSEC_F13 = "ubsec_max_key_len_ioctl";
 397
 398 /* Destructor (complements the "ENGINE_ubsec()" constructor) */
 399 static int ubsec_destroy(ENGINE *e)
 400         {
 401         ubsec_unload_error_strings();
 402         return 1;
 403         }
 404
 405 /* (de)initialisation functions. */
 406 static int ubsec_init(ENGINE *e)
 407         {
 408         t_UBSEC_ubsec_bytes_to_bits *p1;
 409         t_UBSEC_ubsec_bits_to_bytes *p2;
 410         t_UBSEC_ubsec_open *p3;
 411         t_UBSEC_ubsec_close *p4;
 412 #ifndef OPENSSL_NO_DH
 413         t_UBSEC_diffie_hellman_generate_ioctl *p5;
 414         t_UBSEC_diffie_hellman_agree_ioctl *p6;
 415 #endif
 416 /* #ifndef OPENSSL_NO_RSA */
 417         t_UBSEC_rsa_mod_exp_ioctl *p7;
 418         t_UBSEC_rsa_mod_exp_crt_ioctl *p8;
 419 /* #endif */
 420 #ifndef OPENSSL_NO_DSA
 421         t_UBSEC_dsa_sign_ioctl *p9;
 422         t_UBSEC_dsa_verify_ioctl *p10;
 423 #endif
 424         t_UBSEC_math_accelerate_ioctl *p11;
 425         t_UBSEC_rng_ioctl *p12;
 426         t_UBSEC_max_key_len_ioctl *p13;
 427         int fd = 0;
 428
 429         if(ubsec_dso != NULL)
 430                 {
 431                 UBSECerr(UBSEC_F_UBSEC_INIT, UBSEC_R_ALREADY_LOADED);
 432                 goto err;
 433                 }
 434         /*
 435          * Attempt to load libubsec.so/ubsec.dll/whatever.
 436          */
 437         ubsec_dso = DSO_load(NULL, UBSEC_LIBNAME, NULL, 0);
 438         if(ubsec_dso == NULL)
 439                 {
 440                 UBSECerr(UBSEC_F_UBSEC_INIT, UBSEC_R_DSO_FAILURE);
 441                 goto err;
 442                 }
 443
 444         if (
 445         !(p1 = (t_UBSEC_ubsec_bytes_to_bits *) DSO_bind_func(ubsec_dso, UBSEC_F1)) ||
 446         !(p2 = (t_UBSEC_ubsec_bits_to_bytes *) DSO_bind_func(ubsec_dso, UBSEC_F2)) ||
 447         !(p3 = (t_UBSEC_ubsec_open *) DSO_bind_func(ubsec_dso, UBSEC_F3)) ||
 448         !(p4 = (t_UBSEC_ubsec_close *) DSO_bind_func(ubsec_dso, UBSEC_F4)) ||
 449 #ifndef OPENSSL_NO_DH
 450         !(p5 = (t_UBSEC_diffie_hellman_generate_ioctl *)
 451                                 DSO_bind_func(ubsec_dso, UBSEC_F5)) ||
 452         !(p6 = (t_UBSEC_diffie_hellman_agree_ioctl *)
 453                                 DSO_bind_func(ubsec_dso, UBSEC_F6)) ||
 454 #endif
 455 /* #ifndef OPENSSL_NO_RSA */
 456         !(p7 = (t_UBSEC_rsa_mod_exp_ioctl *) DSO_bind_func(ubsec_dso, UBSEC_F7)) ||
 457         !(p8 = (t_UBSEC_rsa_mod_exp_crt_ioctl *) DSO_bind_func(ubsec_dso, UBSEC_F8)) ||
 458 /* #endif */
 459 #ifndef OPENSSL_NO_DSA
 460         !(p9 = (t_UBSEC_dsa_sign_ioctl *) DSO_bind_func(ubsec_dso, UBSEC_F9)) ||
 461         !(p10 = (t_UBSEC_dsa_verify_ioctl *) DSO_bind_func(ubsec_dso, UBSEC_F10)) ||
 462 #endif
 463         !(p11 = (t_UBSEC_math_accelerate_ioctl *)
 464                                 DSO_bind_func(ubsec_dso, UBSEC_F11)) ||
 465         !(p12 = (t_UBSEC_rng_ioctl *) DSO_bind_func(ubsec_dso, UBSEC_F12)) ||
 466         !(p13 = (t_UBSEC_max_key_len_ioctl *) DSO_bind_func(ubsec_dso, UBSEC_F13)))
 467                 {
 468                 UBSECerr(UBSEC_F_UBSEC_INIT, UBSEC_R_DSO_FAILURE);
 469                 goto err;
 470                 }
 471
 472         /* Copy the pointers */
 473         p_UBSEC_ubsec_bytes_to_bits = p1;
 474         p_UBSEC_ubsec_bits_to_bytes = p2;
 475         p_UBSEC_ubsec_open = p3;
 476         p_UBSEC_ubsec_close = p4;
 477 #ifndef OPENSSL_NO_DH
 478         p_UBSEC_diffie_hellman_generate_ioctl = p5;
 479         p_UBSEC_diffie_hellman_agree_ioctl = p6;
 480 #endif
 481 #ifndef OPENSSL_NO_RSA
 482         p_UBSEC_rsa_mod_exp_ioctl = p7;
 483         p_UBSEC_rsa_mod_exp_crt_ioctl = p8;
 484 #endif
 485 #ifndef OPENSSL_NO_DSA
 486         p_UBSEC_dsa_sign_ioctl = p9;
 487         p_UBSEC_dsa_verify_ioctl = p10;
 488 #endif
 489         p_UBSEC_math_accelerate_ioctl = p11;
 490         p_UBSEC_rng_ioctl = p12;
 491         p_UBSEC_max_key_len_ioctl = p13;
 492
 493         /* Perform an open to see if there's actually any unit running. */
 494         if (((fd = p_UBSEC_ubsec_open(UBSEC_KEY_DEVICE_NAME)) > 0) && (p_UBSEC_max_key_len_ioctl(fd, &max_key_len) == 0))
 495         {
 496            p_UBSEC_ubsec_close(fd);
 497            return 1;
 498         }
 499         else
 500         {
 501           UBSECerr(UBSEC_F_UBSEC_INIT, UBSEC_R_UNIT_FAILURE);
 502         }
 503
 504 err:
 505         if(ubsec_dso)
 506                 DSO_free(ubsec_dso);
 507         p_UBSEC_ubsec_bytes_to_bits = NULL;
 508         p_UBSEC_ubsec_bits_to_bytes = NULL;
 509         p_UBSEC_ubsec_open = NULL;
 510         p_UBSEC_ubsec_close = NULL;
 511 #ifndef OPENSSL_NO_DH
 512         p_UBSEC_diffie_hellman_generate_ioctl = NULL;
 513         p_UBSEC_diffie_hellman_agree_ioctl = NULL;
 514 #endif
 515 #ifndef OPENSSL_NO_RSA
 516         p_UBSEC_rsa_mod_exp_ioctl = NULL;
 517         p_UBSEC_rsa_mod_exp_crt_ioctl = NULL;
 518 #endif
 519 #ifndef OPENSSL_NO_DSA
 520         p_UBSEC_dsa_sign_ioctl = NULL;
 521         p_UBSEC_dsa_verify_ioctl = NULL;
 522 #endif
 523         p_UBSEC_math_accelerate_ioctl = NULL;
 524         p_UBSEC_rng_ioctl = NULL;
 525         p_UBSEC_max_key_len_ioctl = NULL;
 526
 527         return 0;
 528         }
 529
 530 static int ubsec_finish(ENGINE *e)
 531         {
 532         if(ubsec_dso == NULL)
 533                 {
 534                 UBSECerr(UBSEC_F_UBSEC_FINISH, UBSEC_R_NOT_LOADED);
 535                 return 0;
 536                 }
 537         if(!DSO_free(ubsec_dso))
 538                 {
 539                 UBSECerr(UBSEC_F_UBSEC_FINISH, UBSEC_R_DSO_FAILURE);
 540                 return 0;
 541                 }
 542         ubsec_dso = NULL;
 543         p_UBSEC_ubsec_bytes_to_bits = NULL;
 544         p_UBSEC_ubsec_bits_to_bytes = NULL;
 545         p_UBSEC_ubsec_open = NULL;
 546         p_UBSEC_ubsec_close = NULL;
 547 #ifndef OPENSSL_NO_DH
 548         p_UBSEC_diffie_hellman_generate_ioctl = NULL;
 549         p_UBSEC_diffie_hellman_agree_ioctl = NULL;
 550 #endif
 551 #ifndef OPENSSL_NO_RSA
 552         p_UBSEC_rsa_mod_exp_ioctl = NULL;
 553         p_UBSEC_rsa_mod_exp_crt_ioctl = NULL;
 554 #endif
 555 #ifndef OPENSSL_NO_DSA
 556         p_UBSEC_dsa_sign_ioctl = NULL;
 557         p_UBSEC_dsa_verify_ioctl = NULL;
 558 #endif
 559         p_UBSEC_math_accelerate_ioctl = NULL;
 560         p_UBSEC_rng_ioctl = NULL;
 561         p_UBSEC_max_key_len_ioctl = NULL;
 562         return 1;
 563         }
 564
 565 static int ubsec_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f)())
 566         {
 567         int initialised = ((ubsec_dso == NULL) ? 0 : 1);
 568         switch(cmd)
 569                 {
 570         case UBSEC_CMD_SO_PATH:
 571                 if(p == NULL)
 572                         {
 573                         UBSECerr(UBSEC_F_UBSEC_CTRL,ERR_R_PASSED_NULL_PARAMETER);
 574                         return 0;
 575                         }
 576                 if(initialised)
 577                         {
 578                         UBSECerr(UBSEC_F_UBSEC_CTRL,UBSEC_R_ALREADY_LOADED);
 579                         return 0;
 580                         }
 581                 UBSEC_LIBNAME = (const char *)p;
 582                 return 1;
 583         default:
 584                 break;
 585                 }
 586         UBSECerr(UBSEC_F_UBSEC_CTRL,UBSEC_R_CTRL_COMMAND_NOT_IMPLEMENTED);
 587         return 0;
 588         }
 589
 590 static int ubsec_mod_exp(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
 591                 const BIGNUM *m, BN_CTX *ctx)
 592         {
 593         int     y_len = 0;
 594         int     fd;
 595
 596         if(ubsec_dso == NULL)
 597         {
 598                 UBSECerr(UBSEC_F_UBSEC_MOD_EXP, UBSEC_R_NOT_LOADED);
 599                 return 0;
 600         }
 601
 602         /* Check if hardware can't handle this argument. */
 603         y_len = BN_num_bits(m);
 604         if (y_len > max_key_len) {
 605                 UBSECerr(UBSEC_F_UBSEC_MOD_EXP, UBSEC_R_SIZE_TOO_LARGE_OR_TOO_SMALL);
 606                 return BN_mod_exp(r, a, p, m, ctx);
 607         }
 608
 609         if(!bn_wexpand(r, m->top))
 610         {
 611                 UBSECerr(UBSEC_F_UBSEC_MOD_EXP, UBSEC_R_BN_EXPAND_FAIL);
 612                 return 0;
 613         }
 614         memset(r->d, 0, BN_num_bytes(m));
 615
 616         if ((fd = p_UBSEC_ubsec_open(UBSEC_KEY_DEVICE_NAME)) <= 0) {
 617                 fd = 0;
 618                 UBSECerr(UBSEC_F_UBSEC_INIT, UBSEC_R_UNIT_FAILURE);
 619                 return BN_mod_exp(r, a, p, m, ctx);
 620         }
 621
 622         if (p_UBSEC_rsa_mod_exp_ioctl(fd, (unsigned char *)a->d, BN_num_bits(a),
 623                 (unsigned char *)m->d, BN_num_bits(m), (unsigned char *)p->d,
 624                 BN_num_bits(p), (unsigned char *)r->d, &y_len) != 0)
 625         {
 626                 UBSECerr(UBSEC_F_UBSEC_MOD_EXP, UBSEC_R_REQUEST_FAILED);
 627                 p_UBSEC_ubsec_close(fd);
 628
 629                 return BN_mod_exp(r, a, p, m, ctx);
 630         }
 631
 632         p_UBSEC_ubsec_close(fd);
 633
 634         r->top = (BN_num_bits(m)+BN_BITS2-1)/BN_BITS2;
 635         return 1;
 636         }
 637
 638 #ifndef OPENSSL_NO_RSA
 639 static int ubsec_rsa_mod_exp(BIGNUM *r0, const BIGNUM *I, RSA *rsa)
 640         {
 641         BN_CTX *ctx;
 642         int to_return = 0;
 643
 644         if((ctx = BN_CTX_new()) == NULL)
 645                 goto err;
 646
 647         if(!rsa->p || !rsa->q || !rsa->dmp1 || !rsa->dmq1 || !rsa->iqmp)
 648                 {
 649                 UBSECerr(UBSEC_F_UBSEC_RSA_MOD_EXP, UBSEC_R_MISSING_KEY_COMPONENTS);
 650                 goto err;
 651                 }
 652
 653         to_return = ubsec_mod_exp_crt(r0, I, rsa->p, rsa->q, rsa->dmp1,
 654                     rsa->dmq1, rsa->iqmp, ctx);
 655         if (to_return == FAIL_TO_SOFTWARE)
 656         {
 657           /*
 658            * Do in software as hardware failed.
 659            */
 660            const RSA_METHOD *meth = RSA_PKCS1_SSLeay();
 661            to_return = (*meth->rsa_mod_exp)(r0, I, rsa);
 662         }
 663 err:
 664         if(ctx)
 665                 BN_CTX_free(ctx);
 666         return to_return;
 667         }
 668 #endif
 669
 670 static int ubsec_mod_exp_crt(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
 671                         const BIGNUM *q, const BIGNUM *dp,
 672                         const BIGNUM *dq, const BIGNUM *qinv, BN_CTX *ctx)
 673         {
 674         int     y_len,
 675                 m_len,
 676                 fd;
 677
 678         m_len = BN_num_bytes(p) + BN_num_bytes(q) + 1;
 679         y_len = BN_num_bits(p) + BN_num_bits(q);
 680
 681         /* Check if hardware can't handle this argument. */
 682         if (y_len > max_key_len) {
 683                 UBSECerr(UBSEC_F_UBSEC_MOD_EXP, UBSEC_R_SIZE_TOO_LARGE_OR_TOO_SMALL);
 684                 return FAIL_TO_SOFTWARE;
 685         }
 686
 687         if (!bn_wexpand(r, p->top + q->top + 1)) {
 688                 UBSECerr(UBSEC_F_UBSEC_RSA_MOD_EXP_CRT, UBSEC_R_BN_EXPAND_FAIL);
 689                 return 0;
 690         }
 691
 692         if ((fd = p_UBSEC_ubsec_open(UBSEC_KEY_DEVICE_NAME)) <= 0) {
 693                 fd = 0;
 694                 UBSECerr(UBSEC_F_UBSEC_INIT, UBSEC_R_UNIT_FAILURE);
 695                 return FAIL_TO_SOFTWARE;
 696         }
 697
 698         if (p_UBSEC_rsa_mod_exp_crt_ioctl(fd,
 699                 (unsigned char *)a->d, BN_num_bits(a),
 700                 (unsigned char *)qinv->d, BN_num_bits(qinv),
 701                 (unsigned char *)dp->d, BN_num_bits(dp),
 702                 (unsigned char *)p->d, BN_num_bits(p),
 703                 (unsigned char *)dq->d, BN_num_bits(dq),
 704                 (unsigned char *)q->d, BN_num_bits(q),
 705                 (unsigned char *)r->d,  &y_len) != 0) {
 706                 UBSECerr(UBSEC_F_UBSEC_MOD_EXP, UBSEC_R_REQUEST_FAILED);
 707                 p_UBSEC_ubsec_close(fd);
 708                 return FAIL_TO_SOFTWARE;
 709         }
 710
 711         p_UBSEC_ubsec_close(fd);
 712
 713         r->top = (BN_num_bits(p) + BN_num_bits(q) + BN_BITS2 - 1)/BN_BITS2;
 714         return 1;
 715 }
 716
 717 #ifndef OPENSSL_NO_DSA
 718 #if NOT_USED
 719 static int ubsec_dsa_mod_exp(DSA *dsa, BIGNUM *rr, BIGNUM *a1,
 720                 BIGNUM *p1, BIGNUM *a2, BIGNUM *p2, BIGNUM *m,
 721                 BN_CTX *ctx, BN_MONT_CTX *in_mont)
 722         {
 723         BIGNUM t;
 724         int to_return = 0;
 725
 726         BN_init(&t);
 727         /* let rr = a1 ^ p1 mod m */
 728         if (!ubsec_mod_exp(rr,a1,p1,m,ctx)) goto end;
 729         /* let t = a2 ^ p2 mod m */
 730         if (!ubsec_mod_exp(&t,a2,p2,m,ctx)) goto end;
 731         /* let rr = rr * t mod m */
 732         if (!BN_mod_mul(rr,rr,&t,m,ctx)) goto end;
 733         to_return = 1;
 734 end:
 735         BN_free(&t);
 736         return to_return;
 737         }
 738
 739 static int ubsec_mod_exp_dsa(DSA *dsa, BIGNUM *r, BIGNUM *a,
 740                 const BIGNUM *p, const BIGNUM *m, BN_CTX *ctx,
 741                 BN_MONT_CTX *m_ctx)
 742         {
 743         return ubsec_mod_exp(r, a, p, m, ctx);
 744         }
 745 #endif
 746 #endif
 747
 748 /*
 749  * This function is aliased to mod_exp (with the mont stuff dropped).
 750  */
 751 static int ubsec_mod_exp_mont(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
 752                 const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx)
 753         {
 754         int ret = 0;
 755
 756 #ifndef OPENSSL_NO_RSA
 757         /* Do in software if the key is too large for the hardware. */
 758         if (BN_num_bits(m) > max_key_len)
 759                 {
 760                 const RSA_METHOD *meth = RSA_PKCS1_SSLeay();
 761                 ret = (*meth->bn_mod_exp)(r, a, p, m, ctx, m_ctx);
 762                 }
 763         else
 764 #endif
 765                 {
 766                 ret = ubsec_mod_exp(r, a, p, m, ctx);
 767                 }
 768
 769         return ret;
 770         }
 771
 772 #ifndef OPENSSL_NO_DH
 773 /* This function is aliased to mod_exp (with the dh and mont dropped). */
 774 static int ubsec_mod_exp_dh(const DH *dh, BIGNUM *r, const BIGNUM *a,
 775                 const BIGNUM *p, const BIGNUM *m, BN_CTX *ctx,
 776                 BN_MONT_CTX *m_ctx)
 777         {
 778         return ubsec_mod_exp(r, a, p, m, ctx);
 779         }
 780 #endif
 781
 782 #ifndef OPENSSL_NO_DSA
 783 static DSA_SIG *ubsec_dsa_do_sign(const unsigned char *dgst, int dlen, DSA *dsa)
 784         {
 785         DSA_SIG *to_return = NULL;
 786         int s_len = 160, r_len = 160, d_len, fd;
 787         BIGNUM m, *r=NULL, *s=NULL;
 788
 789         BN_init(&m);
 790
 791         s = BN_new();
 792         r = BN_new();
 793         if ((s == NULL) || (r==NULL))
 794                 goto err;
 795
 796         d_len = p_UBSEC_ubsec_bytes_to_bits((unsigned char *)dgst, dlen);
 797
 798         if(!bn_wexpand(r, (160+BN_BITS2-1)/BN_BITS2) ||
 799            (!bn_wexpand(s, (160+BN_BITS2-1)/BN_BITS2))) {
 800                 UBSECerr(UBSEC_F_UBSEC_DSA_SIGN, UBSEC_R_BN_EXPAND_FAIL);
 801                 goto err;
 802         }
 803
 804         if (BN_bin2bn(dgst,dlen,&m) == NULL) {
 805                 UBSECerr(UBSEC_F_UBSEC_DSA_SIGN, UBSEC_R_BN_EXPAND_FAIL);
 806                 goto err;
 807         }
 808
 809         if ((fd = p_UBSEC_ubsec_open(UBSEC_KEY_DEVICE_NAME)) <= 0) {
 810                 const DSA_METHOD *meth;
 811                 fd = 0;
 812                 UBSECerr(UBSEC_F_UBSEC_INIT, UBSEC_R_UNIT_FAILURE);
 813                 meth = DSA_OpenSSL();
 814                 to_return =  meth->dsa_do_sign(dgst, dlen, dsa);
 815                 goto err;
 816         }
 817
 818         if (p_UBSEC_dsa_sign_ioctl(fd, 0, /* compute hash before signing */
 819                 (unsigned char *)dgst, d_len,
 820                 NULL, 0,  /* compute random value */
 821                 (unsigned char *)dsa->p->d, BN_num_bits(dsa->p),
 822                 (unsigned char *)dsa->q->d, BN_num_bits(dsa->q),
 823                 (unsigned char *)dsa->g->d, BN_num_bits(dsa->g),
 824                 (unsigned char *)dsa->priv_key->d, BN_num_bits(dsa->priv_key),
 825                 (unsigned char *)r->d, &r_len,
 826                 (unsigned char *)s->d, &s_len ) != 0) {
 827                 const DSA_METHOD *meth;
 828
 829                 UBSECerr(UBSEC_F_UBSEC_DSA_SIGN, UBSEC_R_REQUEST_FAILED);
 830                 p_UBSEC_ubsec_close(fd);
 831                 meth = DSA_OpenSSL();
 832                 to_return = meth->dsa_do_sign(dgst, dlen, dsa);
 833
 834                 goto err;
 835         }
 836
 837         p_UBSEC_ubsec_close(fd);
 838
 839         r->top = (160+BN_BITS2-1)/BN_BITS2;
 840         s->top = (160+BN_BITS2-1)/BN_BITS2;
 841
 842         to_return = DSA_SIG_new();
 843         if(to_return == NULL) {
 844                 UBSECerr(UBSEC_F_UBSEC_DSA_SIGN, UBSEC_R_BN_EXPAND_FAIL);
 845                 goto err;
 846         }
 847
 848         to_return->r = r;
 849         to_return->s = s;
 850
 851 err:
 852         if (!to_return) {
 853                 if (r) BN_free(r);
 854                 if (s) BN_free(s);
 855         }
 856         BN_clear_free(&m);
 857         return to_return;
 858 }
 859
 860 static int ubsec_dsa_verify(const unsigned char *dgst, int dgst_len,
 861                                 DSA_SIG *sig, DSA *dsa)
 862         {
 863         int v_len, d_len;
 864         int to_return = 0;
 865         int fd;
 866         BIGNUM v;
 867
 868         BN_init(&v);
 869
 870         if(!bn_wexpand(&v, dsa->p->top)) {
 871                 UBSECerr(UBSEC_F_UBSEC_DSA_VERIFY ,UBSEC_R_BN_EXPAND_FAIL);
 872                 goto err;
 873         }
 874
 875         v_len = BN_num_bits(dsa->p);
 876
 877         d_len = p_UBSEC_ubsec_bytes_to_bits((unsigned char *)dgst, dgst_len);
 878
 879         if ((fd = p_UBSEC_ubsec_open(UBSEC_KEY_DEVICE_NAME)) <= 0) {
 880                 const DSA_METHOD *meth;
 881                 fd = 0;
 882                 UBSECerr(UBSEC_F_UBSEC_INIT, UBSEC_R_UNIT_FAILURE);
 883                 meth = DSA_OpenSSL();
 884                 to_return = meth->dsa_do_verify(dgst, dgst_len, sig, dsa);
 885                 goto err;
 886         }
 887
 888         if (p_UBSEC_dsa_verify_ioctl(fd, 0, /* compute hash before signing */
 889                 (unsigned char *)dgst, d_len,
 890                 (unsigned char *)dsa->p->d, BN_num_bits(dsa->p),
 891                 (unsigned char *)dsa->q->d, BN_num_bits(dsa->q),
 892                 (unsigned char *)dsa->g->d, BN_num_bits(dsa->g),
 893                 (unsigned char *)dsa->pub_key->d, BN_num_bits(dsa->pub_key),
 894                 (unsigned char *)sig->r->d, BN_num_bits(sig->r),
 895                 (unsigned char *)sig->s->d, BN_num_bits(sig->s),
 896                 (unsigned char *)v.d, &v_len) != 0) {
 897                 const DSA_METHOD *meth;
 898                 UBSECerr(UBSEC_F_UBSEC_DSA_VERIFY , UBSEC_R_REQUEST_FAILED);
 899                 p_UBSEC_ubsec_close(fd);
 900
 901                 meth = DSA_OpenSSL();
 902                 to_return = meth->dsa_do_verify(dgst, dgst_len, sig, dsa);
 903
 904                 goto err;
 905         }
 906
 907         p_UBSEC_ubsec_close(fd);
 908
 909         to_return = 1;
 910 err:
 911         BN_clear_free(&v);
 912         return to_return;
 913         }
 914 #endif
 915
 916 #ifndef OPENSSL_NO_DH
 917 static int ubsec_dh_compute_key (unsigned char *key,const BIGNUM *pub_key,DH *dh)
 918         {
 919         int      ret      = -1,
 920                  k_len,
 921                  fd;
 922
 923         k_len = BN_num_bits(dh->p);
 924
 925         if ((fd = p_UBSEC_ubsec_open(UBSEC_KEY_DEVICE_NAME)) <= 0)
 926                 {
 927                 const DH_METHOD *meth;
 928                 ENGINEerr(UBSEC_F_UBSEC_INIT, ENGINE_R_UNIT_FAILURE);
 929                 meth = DH_OpenSSL();
 930                 ret = meth->compute_key(key, pub_key, dh);
 931                 goto err;
 932                 }
 933
 934         if (p_UBSEC_diffie_hellman_agree_ioctl(fd,
 935                                                (unsigned char *)dh->priv_key->d, BN_num_bits(dh->priv_key),
 936                                                (unsigned char *)pub_key->d, BN_num_bits(pub_key),
 937                                                (unsigned char *)dh->p->d, BN_num_bits(dh->p),
 938                                                key, &k_len) != 0)
 939                 {
 940                 /* Hardware's a no go, failover to software */
 941                 const DH_METHOD *meth;
 942                 ENGINEerr(UBSEC_F_UBSEC_DH_COMPUTE_KEY, ENGINE_R_REQUEST_FAILED);
 943                 p_UBSEC_ubsec_close(fd);
 944
 945                 meth = DH_OpenSSL();
 946                 ret = meth->compute_key(key, pub_key, dh);
 947
 948                 goto err;
 949                 }
 950
 951         p_UBSEC_ubsec_close(fd);
 952
 953         ret = p_UBSEC_ubsec_bits_to_bytes(k_len);
 954 err:
 955         return ret;
 956         }
 957
 958 static int ubsec_dh_generate_key (DH *dh)
 959         {
 960         int      ret               = 0,
 961                  random_bits       = 0,
 962                  pub_key_len       = 0,
 963                  priv_key_len      = 0,
 964                  fd;
 965         BIGNUM   *pub_key          = NULL;
 966         BIGNUM   *priv_key         = NULL;
 967
 968         /*
 969          *  How many bits should Random x be? dh_key.c
 970          *  sets the range from 0 to num_bits(modulus) ???
 971          */
 972
 973         if (dh->priv_key == NULL)
 974                 {
 975                 priv_key = BN_new();
 976                 if (priv_key == NULL) goto err;
 977                 priv_key_len = BN_num_bits(dh->p);
 978                 bn_wexpand(priv_key, dh->p->top);
 979                 do
 980                         if (!BN_rand_range(priv_key, dh->p)) goto err;
 981                 while (BN_is_zero(priv_key));
 982                 random_bits = BN_num_bits(priv_key);
 983                 }
 984         else
 985                 {
 986                 priv_key = dh->priv_key;
 987                 }
 988
 989         if (dh->pub_key == NULL)
 990                 {
 991                 pub_key = BN_new();
 992                 pub_key_len = BN_num_bits(dh->p);
 993                 bn_wexpand(pub_key, dh->p->top);
 994                 if(pub_key == NULL) goto err;
 995                 }
 996         else
 997                 {
 998                 pub_key = dh->pub_key;
 999                 }
1000
1001         if ((fd = p_UBSEC_ubsec_open(UBSEC_KEY_DEVICE_NAME)) <= 0)
1002                 {
1003                 const DH_METHOD *meth;
1004                 ENGINEerr(UBSEC_F_UBSEC_INIT, ENGINE_R_UNIT_FAILURE);
1005                 meth = DH_OpenSSL();
1006                 ret = meth->generate_key(dh);
1007                 goto err;
1008                 }
1009
1010         if (p_UBSEC_diffie_hellman_generate_ioctl(fd,
1011                                                   (unsigned char *)priv_key->d, &priv_key_len,
1012                                                   (unsigned char *)pub_key->d,  &pub_key_len,
1013                                                   (unsigned char *)dh->g->d, BN_num_bits(dh->g),
1014                                                   (unsigned char *)dh->p->d, BN_num_bits(dh->p),
1015                                                   0, 0, random_bits) != 0)
1016                 {
1017                 /* Hardware's a no go, failover to software */
1018                 const DH_METHOD *meth;
1019
1020                 ENGINEerr(UBSEC_F_UBSEC_DH_COMPUTE_KEY, ENGINE_R_REQUEST_FAILED);
1021                 p_UBSEC_ubsec_close(fd);
1022
1023                 meth = DH_OpenSSL();
1024                 ret = meth->generate_key(dh);
1025
1026                 goto err;
1027                 }
1028
1029         p_UBSEC_ubsec_close(fd);
1030
1031         dh->pub_key = pub_key;
1032         dh->pub_key->top = (pub_key_len + BN_BITS2-1) / BN_BITS2;
1033         dh->priv_key = priv_key;
1034         dh->priv_key->top = (priv_key_len + BN_BITS2-1) / BN_BITS2;
1035
1036         ret = 1;
1037 err:
1038         return ret;
1039         }
1040 #endif
1041
1042 #if NOT_USED
1043 static int ubsec_rand_bytes(unsigned char * buf,
1044                             int num)
1045         {
1046         int      ret      = 0,
1047                  fd;
1048
1049         if ((fd = p_UBSEC_ubsec_open(UBSEC_KEY_DEVICE_NAME)) <= 0)
1050                 {
1051                 const RAND_METHOD *meth;
1052                 ENGINEerr(UBSEC_F_UBSEC_INIT, ENGINE_R_UNIT_FAILURE);
1053                 num = p_UBSEC_ubsec_bits_to_bytes(num);
1054                 meth = RAND_SSLeay();
1055                 meth->seed(buf, num);
1056                 ret = meth->bytes(buf, num);
1057                 goto err;
1058                 }
1059
1060         num *= 8; /* bytes to bits */
1061
1062         if (p_UBSEC_rng_ioctl(fd,
1063                               UBSEC_RNG_DIRECT,
1064                               buf,
1065                               &num) != 0)
1066                 {
1067                 /* Hardware's a no go, failover to software */
1068                 const RAND_METHOD *meth;
1069
1070                 ENGINEerr(UBSEC_F_UBSEC_RNG_BYTES, ENGINE_R_REQUEST_FAILED);
1071                 p_UBSEC_ubsec_close(fd);
1072
1073                 num = p_UBSEC_ubsec_bits_to_bytes(num);
1074                 meth = RAND_SSLeay();
1075                 meth->seed(buf, num);
1076                 ret = meth->bytes(buf, num);
1077
1078                 goto err;
1079                 }
1080
1081         p_UBSEC_ubsec_close(fd);
1082
1083         ret = 1;
1084 err:
1085         return(ret);
1086         }
1087
1088
1089 static int ubsec_rand_status(void)
1090         {
1091         return 0;
1092         }
1093 #endif
1094
1095 /* This stuff is needed if this ENGINE is being compiled into a self-contained
1096  * shared-library. */
1097 #ifdef ENGINE_DYNAMIC_SUPPORT
1098 static int bind_fn(ENGINE *e, const char *id)
1099         {
1100         if(id && (strcmp(id, engine_ubsec_id) != 0))
1101                 return 0;
1102         if(!bind_helper(e))
1103                 return 0;
1104         return 1;
1105         }
1106 IMPLEMENT_DYNAMIC_CHECK_FN()
1107 IMPLEMENT_DYNAMIC_BIND_FN(bind_fn)
1108 #endif /* ENGINE_DYNAMIC_SUPPORT */
1109
1110 #endif /* !OPENSSL_NO_HW_UBSEC */
1111 #endif /* !OPENSSL_NO_HW */