engines/e_ubsec.c

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