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_OpenSSL()" 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_OpenSSL();
 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 == NULL)
 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     OPENSSL_free(UBSEC_LIBNAME);
 343     UBSEC_LIBNAME = NULL;
 344 }
 345
 346 static long set_UBSEC_LIBNAME(const char *name)
 347 {
 348     free_UBSEC_LIBNAME();
 349     return (((UBSEC_LIBNAME = OPENSSL_strdup(name)) != NULL) ? 1 : 0);
 350 }
 351
 352 static const char *UBSEC_F1 = "ubsec_bytes_to_bits";
 353 static const char *UBSEC_F2 = "ubsec_bits_to_bytes";
 354 static const char *UBSEC_F3 = "ubsec_open";
 355 static const char *UBSEC_F4 = "ubsec_close";
 356 #  ifndef OPENSSL_NO_DH
 357 static const char *UBSEC_F5 = "diffie_hellman_generate_ioctl";
 358 static const char *UBSEC_F6 = "diffie_hellman_agree_ioctl";
 359 #  endif
 360 /* #ifndef OPENSSL_NO_RSA */
 361 static const char *UBSEC_F7 = "rsa_mod_exp_ioctl";
 362 static const char *UBSEC_F8 = "rsa_mod_exp_crt_ioctl";
 363 /* #endif */
 364 #  ifndef OPENSSL_NO_DSA
 365 static const char *UBSEC_F9 = "dsa_sign_ioctl";
 366 static const char *UBSEC_F10 = "dsa_verify_ioctl";
 367 #  endif
 368 static const char *UBSEC_F11 = "math_accelerate_ioctl";
 369 static const char *UBSEC_F12 = "rng_ioctl";
 370 static const char *UBSEC_F13 = "ubsec_max_key_len_ioctl";
 371
 372 /* Destructor (complements the "ENGINE_ubsec()" constructor) */
 373 static int ubsec_destroy(ENGINE *e)
 374 {
 375     free_UBSEC_LIBNAME();
 376     ERR_unload_UBSEC_strings();
 377     return 1;
 378 }
 379
 380 /* (de)initialisation functions. */
 381 static int ubsec_init(ENGINE *e)
 382 {
 383     t_UBSEC_ubsec_bytes_to_bits *p1;
 384     t_UBSEC_ubsec_bits_to_bytes *p2;
 385     t_UBSEC_ubsec_open *p3;
 386     t_UBSEC_ubsec_close *p4;
 387 #  ifndef OPENSSL_NO_DH
 388     t_UBSEC_diffie_hellman_generate_ioctl *p5;
 389     t_UBSEC_diffie_hellman_agree_ioctl *p6;
 390 #  endif
 391 /* #ifndef OPENSSL_NO_RSA */
 392     t_UBSEC_rsa_mod_exp_ioctl *p7;
 393     t_UBSEC_rsa_mod_exp_crt_ioctl *p8;
 394 /* #endif */
 395 #  ifndef OPENSSL_NO_DSA
 396     t_UBSEC_dsa_sign_ioctl *p9;
 397     t_UBSEC_dsa_verify_ioctl *p10;
 398 #  endif
 399     t_UBSEC_math_accelerate_ioctl *p11;
 400     t_UBSEC_rng_ioctl *p12;
 401     t_UBSEC_max_key_len_ioctl *p13;
 402     int fd = 0;
 403
 404     if (ubsec_dso != NULL) {
 405         UBSECerr(UBSEC_F_UBSEC_INIT, UBSEC_R_ALREADY_LOADED);
 406         goto err;
 407     }
 408     /*
 409      * Attempt to load libubsec.so/ubsec.dll/whatever.
 410      */
 411     ubsec_dso = DSO_load(NULL, get_UBSEC_LIBNAME(), NULL, 0);
 412     if (ubsec_dso == NULL) {
 413         UBSECerr(UBSEC_F_UBSEC_INIT, UBSEC_R_DSO_FAILURE);
 414         goto err;
 415     }
 416
 417 #define BINDIT(t, name) (t *)DSO_bind_func(ubsec_dso, name)
 418     if ((p1 = BINDIT(t_UBSEC_ubsec_bytes_to_bits, UBSEC_F1)) == NULL
 419         || (p2 = BINDIT(t_UBSEC_ubsec_bits_to_bytes, UBSEC_F2)) == NULL
 420         || (p3 = BINDIT(t_UBSEC_ubsec_open, UBSEC_F3)) == NULL
 421         || (p4 = BINDIT(t_UBSEC_ubsec_close, UBSEC_F4)) == NULL
 422 #  ifndef OPENSSL_NO_DH
 423         || (p5 = BINDIT(t_UBSEC_diffie_hellman_generate_ioctl, UBSEC_F5)) == NULL
 424         || (p6 = BINDIT(t_UBSEC_diffie_hellman_agree_ioctl, UBSEC_F6)) == NULL
 425 #  endif
 426 /* #ifndef OPENSSL_NO_RSA */
 427         || (p7 = BINDIT(t_UBSEC_rsa_mod_exp_ioctl, UBSEC_F7)) == NULL
 428         || (p8 = BINDIT(t_UBSEC_rsa_mod_exp_crt_ioctl, UBSEC_F8)) == NULL
 429 /* #endif */
 430 #  ifndef OPENSSL_NO_DSA
 431         || (p9 = BINDIT(t_UBSEC_dsa_sign_ioctl, UBSEC_F9)) == NULL
 432         || (p10 = BINDIT(t_UBSEC_dsa_verify_ioctl, UBSEC_F10)) == NULL
 433 #  endif
 434         || (p11 = BINDIT(t_UBSEC_math_accelerate_ioctl, UBSEC_F11)) == NULL
 435         || (p12 = BINDIT(t_UBSEC_rng_ioctl, UBSEC_F12)) == NULL
 436         || (p13 = BINDIT(t_UBSEC_max_key_len_ioctl, UBSEC_F13)) == NULL) {
 437         UBSECerr(UBSEC_F_UBSEC_INIT, UBSEC_R_DSO_FAILURE);
 438         goto err;
 439     }
 440
 441     /* Copy the pointers */
 442     p_UBSEC_ubsec_bytes_to_bits = p1;
 443     p_UBSEC_ubsec_bits_to_bytes = p2;
 444     p_UBSEC_ubsec_open = p3;
 445     p_UBSEC_ubsec_close = p4;
 446 #  ifndef OPENSSL_NO_DH
 447     p_UBSEC_diffie_hellman_generate_ioctl = p5;
 448     p_UBSEC_diffie_hellman_agree_ioctl = p6;
 449 #  endif
 450 #  ifndef OPENSSL_NO_RSA
 451     p_UBSEC_rsa_mod_exp_ioctl = p7;
 452     p_UBSEC_rsa_mod_exp_crt_ioctl = p8;
 453 #  endif
 454 #  ifndef OPENSSL_NO_DSA
 455     p_UBSEC_dsa_sign_ioctl = p9;
 456     p_UBSEC_dsa_verify_ioctl = p10;
 457 #  endif
 458     p_UBSEC_math_accelerate_ioctl = p11;
 459     p_UBSEC_rng_ioctl = p12;
 460     p_UBSEC_max_key_len_ioctl = p13;
 461
 462     /* Perform an open to see if there's actually any unit running. */
 463     if (((fd = p_UBSEC_ubsec_open(UBSEC_KEY_DEVICE_NAME)) > 0)
 464         && (p_UBSEC_max_key_len_ioctl(fd, &max_key_len) == 0)) {
 465         p_UBSEC_ubsec_close(fd);
 466         return 1;
 467     } else {
 468         UBSECerr(UBSEC_F_UBSEC_INIT, UBSEC_R_UNIT_FAILURE);
 469     }
 470
 471  err:
 472     DSO_free(ubsec_dso);
 473     ubsec_dso = NULL;
 474     p_UBSEC_ubsec_bytes_to_bits = NULL;
 475     p_UBSEC_ubsec_bits_to_bytes = NULL;
 476     p_UBSEC_ubsec_open = NULL;
 477     p_UBSEC_ubsec_close = NULL;
 478 #  ifndef OPENSSL_NO_DH
 479     p_UBSEC_diffie_hellman_generate_ioctl = NULL;
 480     p_UBSEC_diffie_hellman_agree_ioctl = NULL;
 481 #  endif
 482 #  ifndef OPENSSL_NO_RSA
 483     p_UBSEC_rsa_mod_exp_ioctl = NULL;
 484     p_UBSEC_rsa_mod_exp_crt_ioctl = NULL;
 485 #  endif
 486 #  ifndef OPENSSL_NO_DSA
 487     p_UBSEC_dsa_sign_ioctl = NULL;
 488     p_UBSEC_dsa_verify_ioctl = NULL;
 489 #  endif
 490     p_UBSEC_math_accelerate_ioctl = NULL;
 491     p_UBSEC_rng_ioctl = NULL;
 492     p_UBSEC_max_key_len_ioctl = NULL;
 493
 494     return 0;
 495 }
 496
 497 static int ubsec_finish(ENGINE *e)
 498 {
 499     free_UBSEC_LIBNAME();
 500     if (ubsec_dso == NULL) {
 501         UBSECerr(UBSEC_F_UBSEC_FINISH, UBSEC_R_NOT_LOADED);
 502         return 0;
 503     }
 504     if (!DSO_free(ubsec_dso)) {
 505         UBSECerr(UBSEC_F_UBSEC_FINISH, UBSEC_R_DSO_FAILURE);
 506         return 0;
 507     }
 508     ubsec_dso = NULL;
 509     p_UBSEC_ubsec_bytes_to_bits = NULL;
 510     p_UBSEC_ubsec_bits_to_bytes = NULL;
 511     p_UBSEC_ubsec_open = NULL;
 512     p_UBSEC_ubsec_close = NULL;
 513 #  ifndef OPENSSL_NO_DH
 514     p_UBSEC_diffie_hellman_generate_ioctl = NULL;
 515     p_UBSEC_diffie_hellman_agree_ioctl = NULL;
 516 #  endif
 517 #  ifndef OPENSSL_NO_RSA
 518     p_UBSEC_rsa_mod_exp_ioctl = NULL;
 519     p_UBSEC_rsa_mod_exp_crt_ioctl = NULL;
 520 #  endif
 521 #  ifndef OPENSSL_NO_DSA
 522     p_UBSEC_dsa_sign_ioctl = NULL;
 523     p_UBSEC_dsa_verify_ioctl = NULL;
 524 #  endif
 525     p_UBSEC_math_accelerate_ioctl = NULL;
 526     p_UBSEC_rng_ioctl = NULL;
 527     p_UBSEC_max_key_len_ioctl = NULL;
 528     return 1;
 529 }
 530
 531 static int ubsec_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f) (void))
 532 {
 533     int initialised = ((ubsec_dso == NULL) ? 0 : 1);
 534     switch (cmd) {
 535     case UBSEC_CMD_SO_PATH:
 536         if (p == NULL) {
 537             UBSECerr(UBSEC_F_UBSEC_CTRL, ERR_R_PASSED_NULL_PARAMETER);
 538             return 0;
 539         }
 540         if (initialised) {
 541             UBSECerr(UBSEC_F_UBSEC_CTRL, UBSEC_R_ALREADY_LOADED);
 542             return 0;
 543         }
 544         return set_UBSEC_LIBNAME((const char *)p);
 545     default:
 546         break;
 547     }
 548     UBSECerr(UBSEC_F_UBSEC_CTRL, UBSEC_R_CTRL_COMMAND_NOT_IMPLEMENTED);
 549     return 0;
 550 }
 551
 552 static int ubsec_mod_exp(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
 553                          const BIGNUM *m, BN_CTX *ctx)
 554 {
 555     int y_len = 0;
 556     int fd;
 557
 558     if (ubsec_dso == NULL) {
 559         UBSECerr(UBSEC_F_UBSEC_MOD_EXP, UBSEC_R_NOT_LOADED);
 560         return 0;
 561     }
 562
 563     /* Check if hardware can't handle this argument. */
 564     y_len = BN_num_bits(m);
 565     if (y_len > max_key_len) {
 566         UBSECerr(UBSEC_F_UBSEC_MOD_EXP, UBSEC_R_SIZE_TOO_LARGE_OR_TOO_SMALL);
 567         return BN_mod_exp(r, a, p, m, ctx);
 568     }
 569
 570     if (!bn_wexpand(r, m->top)) {
 571         UBSECerr(UBSEC_F_UBSEC_MOD_EXP, UBSEC_R_BN_EXPAND_FAIL);
 572         return 0;
 573     }
 574
 575     if ((fd = p_UBSEC_ubsec_open(UBSEC_KEY_DEVICE_NAME)) <= 0) {
 576         fd = 0;
 577         UBSECerr(UBSEC_F_UBSEC_MOD_EXP, UBSEC_R_UNIT_FAILURE);
 578         return BN_mod_exp(r, a, p, m, ctx);
 579     }
 580
 581     if (p_UBSEC_rsa_mod_exp_ioctl(fd, (unsigned char *)a->d, BN_num_bits(a),
 582                                   (unsigned char *)m->d, BN_num_bits(m),
 583                                   (unsigned char *)p->d, BN_num_bits(p),
 584                                   (unsigned char *)r->d, &y_len) != 0) {
 585         UBSECerr(UBSEC_F_UBSEC_MOD_EXP, UBSEC_R_REQUEST_FAILED);
 586         p_UBSEC_ubsec_close(fd);
 587
 588         return BN_mod_exp(r, a, p, m, ctx);
 589     }
 590
 591     p_UBSEC_ubsec_close(fd);
 592
 593     r->top = (BN_num_bits(m) + BN_BITS2 - 1) / BN_BITS2;
 594     return 1;
 595 }
 596
 597 #  ifndef OPENSSL_NO_RSA
 598 static int ubsec_rsa_mod_exp(BIGNUM *r0, const BIGNUM *I, RSA *rsa,
 599                              BN_CTX *ctx)
 600 {
 601     int to_return = 0;
 602
 603     if (!rsa->p || !rsa->q || !rsa->dmp1 || !rsa->dmq1 || !rsa->iqmp) {
 604         UBSECerr(UBSEC_F_UBSEC_RSA_MOD_EXP, UBSEC_R_MISSING_KEY_COMPONENTS);
 605         goto err;
 606     }
 607
 608     to_return = ubsec_mod_exp_crt(r0, I, rsa->p, rsa->q, rsa->dmp1,
 609                                   rsa->dmq1, rsa->iqmp, ctx);
 610     if (to_return == FAIL_TO_SOFTWARE) {
 611         /*
 612          * Do in software as hardware failed.
 613          */
 614         const RSA_METHOD *meth = RSA_PKCS1_OpenSSL();
 615         to_return = (*meth->rsa_mod_exp) (r0, I, rsa, ctx);
 616     }
 617  err:
 618     return to_return;
 619 }
 620
 621 static int ubsec_mod_exp_crt(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
 622                              const BIGNUM *q, const BIGNUM *dp,
 623                              const BIGNUM *dq, const BIGNUM *qinv,
 624                              BN_CTX *ctx)
 625 {
 626     int y_len, fd;
 627
 628     y_len = BN_num_bits(p) + BN_num_bits(q);
 629
 630     /* Check if hardware can't handle this argument. */
 631     if (y_len > max_key_len) {
 632         UBSECerr(UBSEC_F_UBSEC_MOD_EXP_CRT,
 633                  UBSEC_R_SIZE_TOO_LARGE_OR_TOO_SMALL);
 634         return FAIL_TO_SOFTWARE;
 635     }
 636
 637     if (!bn_wexpand(r, p->top + q->top + 1)) {
 638         UBSECerr(UBSEC_F_UBSEC_MOD_EXP_CRT, UBSEC_R_BN_EXPAND_FAIL);
 639         return 0;
 640     }
 641
 642     if ((fd = p_UBSEC_ubsec_open(UBSEC_KEY_DEVICE_NAME)) <= 0) {
 643         fd = 0;
 644         UBSECerr(UBSEC_F_UBSEC_MOD_EXP_CRT, UBSEC_R_UNIT_FAILURE);
 645         return FAIL_TO_SOFTWARE;
 646     }
 647
 648     if (p_UBSEC_rsa_mod_exp_crt_ioctl(fd,
 649                                       (unsigned char *)a->d, BN_num_bits(a),
 650                                       (unsigned char *)qinv->d,
 651                                       BN_num_bits(qinv),
 652                                       (unsigned char *)dp->d, BN_num_bits(dp),
 653                                       (unsigned char *)p->d, BN_num_bits(p),
 654                                       (unsigned char *)dq->d, BN_num_bits(dq),
 655                                       (unsigned char *)q->d, BN_num_bits(q),
 656                                       (unsigned char *)r->d, &y_len) != 0) {
 657         UBSECerr(UBSEC_F_UBSEC_MOD_EXP_CRT, UBSEC_R_REQUEST_FAILED);
 658         p_UBSEC_ubsec_close(fd);
 659         return FAIL_TO_SOFTWARE;
 660     }
 661
 662     p_UBSEC_ubsec_close(fd);
 663
 664     r->top = (BN_num_bits(p) + BN_num_bits(q) + BN_BITS2 - 1) / BN_BITS2;
 665     return 1;
 666 }
 667 #  endif
 668
 669 #  ifndef OPENSSL_NO_RSA
 670
 671 /*
 672  * This function is aliased to mod_exp (with the mont stuff dropped).
 673  */
 674 static int ubsec_mod_exp_mont(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
 675                               const BIGNUM *m, BN_CTX *ctx,
 676                               BN_MONT_CTX *m_ctx)
 677 {
 678     int ret = 0;
 679
 680     /* Do in software if the key is too large for the hardware. */
 681     if (BN_num_bits(m) > max_key_len) {
 682         const RSA_METHOD *meth = RSA_PKCS1_OpenSSL();
 683         ret = (*meth->bn_mod_exp) (r, a, p, m, ctx, m_ctx);
 684     } else {
 685         ret = ubsec_mod_exp(r, a, p, m, ctx);
 686     }
 687
 688     return ret;
 689 }
 690 #  endif
 691
 692 #  ifndef OPENSSL_NO_DH
 693 /* This function is aliased to mod_exp (with the dh and mont dropped). */
 694 static int ubsec_mod_exp_dh(const DH *dh, BIGNUM *r, const BIGNUM *a,
 695                             const BIGNUM *p, const BIGNUM *m, BN_CTX *ctx,
 696                             BN_MONT_CTX *m_ctx)
 697 {
 698     return ubsec_mod_exp(r, a, p, m, ctx);
 699 }
 700 #  endif
 701
 702 #  ifndef OPENSSL_NO_DSA
 703 static DSA_SIG *ubsec_dsa_do_sign(const unsigned char *dgst, int dlen,
 704                                   DSA *dsa)
 705 {
 706     DSA_SIG *to_return = NULL;
 707     int s_len = 160, r_len = 160, d_len, fd;
 708     BIGNUM m, *r = NULL, *s = NULL;
 709
 710     BN_init(&m);
 711
 712     s = BN_new();
 713     r = BN_new();
 714     if ((s == NULL) || (r == NULL))
 715         goto err;
 716
 717     d_len = p_UBSEC_ubsec_bytes_to_bits((unsigned char *)dgst, dlen);
 718
 719     if (!bn_wexpand(r, (160 + BN_BITS2 - 1) / BN_BITS2) ||
 720         (!bn_wexpand(s, (160 + BN_BITS2 - 1) / BN_BITS2))) {
 721         UBSECerr(UBSEC_F_UBSEC_DSA_DO_SIGN, UBSEC_R_BN_EXPAND_FAIL);
 722         goto err;
 723     }
 724
 725     if (BN_bin2bn(dgst, dlen, &m) == NULL) {
 726         UBSECerr(UBSEC_F_UBSEC_DSA_DO_SIGN, UBSEC_R_BN_EXPAND_FAIL);
 727         goto err;
 728     }
 729
 730     if ((fd = p_UBSEC_ubsec_open(UBSEC_KEY_DEVICE_NAME)) <= 0) {
 731         const DSA_METHOD *meth;
 732         fd = 0;
 733         UBSECerr(UBSEC_F_UBSEC_DSA_DO_SIGN, UBSEC_R_UNIT_FAILURE);
 734         meth = DSA_OpenSSL();
 735         to_return = meth->dsa_do_sign(dgst, dlen, dsa);
 736         goto err;
 737     }
 738
 739     if (p_UBSEC_dsa_sign_ioctl(fd,
 740                                /* compute hash before signing */
 741                                0, (unsigned char *)dgst, d_len, NULL,
 742                                /* compute random value */
 743                                0,
 744                                (unsigned char *)dsa->p->d,
 745                                BN_num_bits(dsa->p),
 746                                (unsigned char *)dsa->q->d,
 747                                BN_num_bits(dsa->q),
 748                                (unsigned char *)dsa->g->d,
 749                                BN_num_bits(dsa->g),
 750                                (unsigned char *)dsa->priv_key->d,
 751                                BN_num_bits(dsa->priv_key),
 752                                (unsigned char *)r->d, &r_len,
 753                                (unsigned char *)s->d, &s_len) != 0) {
 754         const DSA_METHOD *meth;
 755
 756         UBSECerr(UBSEC_F_UBSEC_DSA_DO_SIGN, UBSEC_R_REQUEST_FAILED);
 757         p_UBSEC_ubsec_close(fd);
 758         meth = DSA_OpenSSL();
 759         to_return = meth->dsa_do_sign(dgst, dlen, dsa);
 760
 761         goto err;
 762     }
 763
 764     p_UBSEC_ubsec_close(fd);
 765
 766     r->top = (160 + BN_BITS2 - 1) / BN_BITS2;
 767     s->top = (160 + BN_BITS2 - 1) / BN_BITS2;
 768
 769     to_return = DSA_SIG_new();
 770     if (to_return == NULL) {
 771         UBSECerr(UBSEC_F_UBSEC_DSA_DO_SIGN, UBSEC_R_BN_EXPAND_FAIL);
 772         goto err;
 773     }
 774
 775     to_return->r = r;
 776     to_return->s = s;
 777
 778  err:
 779     if (!to_return) {
 780         BN_free(r);
 781         BN_free(s);
 782     }
 783     BN_clear_free(&m);
 784     return to_return;
 785 }
 786
 787 static int ubsec_dsa_verify(const unsigned char *dgst, int dgst_len,
 788                             DSA_SIG *sig, DSA *dsa)
 789 {
 790     int v_len, d_len;
 791     int to_return = 0;
 792     int fd;
 793     BIGNUM v, *pv = &v;
 794
 795     BN_init(&v);
 796
 797     if (!bn_wexpand(pv, dsa->p->top)) {
 798         UBSECerr(UBSEC_F_UBSEC_DSA_VERIFY, UBSEC_R_BN_EXPAND_FAIL);
 799         goto err;
 800     }
 801
 802     v_len = BN_num_bits(dsa->p);
 803
 804     d_len = p_UBSEC_ubsec_bytes_to_bits((unsigned char *)dgst, dgst_len);
 805
 806     if ((fd = p_UBSEC_ubsec_open(UBSEC_KEY_DEVICE_NAME)) <= 0) {
 807         const DSA_METHOD *meth;
 808         fd = 0;
 809         UBSECerr(UBSEC_F_UBSEC_DSA_VERIFY, UBSEC_R_UNIT_FAILURE);
 810         meth = DSA_OpenSSL();
 811         to_return = meth->dsa_do_verify(dgst, dgst_len, sig, dsa);
 812         goto err;
 813     }
 814
 815     if (p_UBSEC_dsa_verify_ioctl(fd, 0, /* compute hash before signing */
 816                                  (unsigned char *)dgst, d_len,
 817                                  (unsigned char *)dsa->p->d,
 818                                  BN_num_bits(dsa->p),
 819                                  (unsigned char *)dsa->q->d,
 820                                  BN_num_bits(dsa->q),
 821                                  (unsigned char *)dsa->g->d,
 822                                  BN_num_bits(dsa->g),
 823                                  (unsigned char *)dsa->pub_key->d,
 824                                  BN_num_bits(dsa->pub_key),
 825                                  (unsigned char *)sig->r->d,
 826                                  BN_num_bits(sig->r),
 827                                  (unsigned char *)sig->s->d,
 828                                  BN_num_bits(sig->s), (unsigned char *)v.d,
 829                                  &v_len) != 0) {
 830         const DSA_METHOD *meth;
 831         UBSECerr(UBSEC_F_UBSEC_DSA_VERIFY, UBSEC_R_REQUEST_FAILED);
 832         p_UBSEC_ubsec_close(fd);
 833
 834         meth = DSA_OpenSSL();
 835         to_return = meth->dsa_do_verify(dgst, dgst_len, sig, dsa);
 836
 837         goto err;
 838     }
 839
 840     p_UBSEC_ubsec_close(fd);
 841
 842     to_return = 1;
 843  err:
 844     BN_clear_free(&v);
 845     return to_return;
 846 }
 847 #  endif
 848
 849 #  ifndef OPENSSL_NO_DH
 850 static int ubsec_dh_compute_key(unsigned char *key, const BIGNUM *pub_key,
 851                                 DH *dh)
 852 {
 853     int ret = -1, k_len, fd;
 854
 855     k_len = BN_num_bits(dh->p);
 856
 857     if ((fd = p_UBSEC_ubsec_open(UBSEC_KEY_DEVICE_NAME)) <= 0) {
 858         const DH_METHOD *meth;
 859         UBSECerr(UBSEC_F_UBSEC_DH_COMPUTE_KEY, UBSEC_R_UNIT_FAILURE);
 860         meth = DH_OpenSSL();
 861         ret = meth->compute_key(key, pub_key, dh);
 862         goto err;
 863     }
 864
 865     if (p_UBSEC_diffie_hellman_agree_ioctl(fd,
 866                                            (unsigned char *)dh->priv_key->d,
 867                                            BN_num_bits(dh->priv_key),
 868                                            (unsigned char *)pub_key->d,
 869                                            BN_num_bits(pub_key),
 870                                            (unsigned char *)dh->p->d,
 871                                            BN_num_bits(dh->p), key,
 872                                            &k_len) != 0) {
 873         /* Hardware's a no go, failover to software */
 874         const DH_METHOD *meth;
 875         UBSECerr(UBSEC_F_UBSEC_DH_COMPUTE_KEY, UBSEC_R_REQUEST_FAILED);
 876         p_UBSEC_ubsec_close(fd);
 877
 878         meth = DH_OpenSSL();
 879         ret = meth->compute_key(key, pub_key, dh);
 880
 881         goto err;
 882     }
 883
 884     p_UBSEC_ubsec_close(fd);
 885
 886     ret = p_UBSEC_ubsec_bits_to_bytes(k_len);
 887  err:
 888     return ret;
 889 }
 890
 891 static int ubsec_dh_generate_key(DH *dh)
 892 {
 893     int ret = 0, random_bits = 0, pub_key_len = 0, priv_key_len = 0, fd;
 894     BIGNUM *pub_key = NULL;
 895     BIGNUM *priv_key = NULL;
 896
 897     /*
 898      *  How many bits should Random x be? dh_key.c
 899      *  sets the range from 0 to num_bits(modulus) ???
 900      */
 901
 902     if (dh->priv_key == NULL) {
 903         priv_key = BN_new();
 904         if (priv_key == NULL)
 905             goto err;
 906         priv_key_len = BN_num_bits(dh->p);
 907         if (bn_wexpand(priv_key, dh->p->top) == NULL)
 908             goto err;
 909         do
 910             if (!BN_rand_range(priv_key, dh->p))
 911                 goto err;
 912         while (BN_is_zero(priv_key)) ;
 913         random_bits = BN_num_bits(priv_key);
 914     } else {
 915         priv_key = dh->priv_key;
 916     }
 917
 918     if (dh->pub_key == NULL) {
 919         pub_key = BN_new();
 920         if (pub_key == NULL)
 921             goto err;
 922         pub_key_len = BN_num_bits(dh->p);
 923         if (bn_wexpand(pub_key, dh->p->top) == NULL)
 924             goto err;
 925     } else {
 926         pub_key = dh->pub_key;
 927     }
 928
 929     if ((fd = p_UBSEC_ubsec_open(UBSEC_KEY_DEVICE_NAME)) <= 0) {
 930         const DH_METHOD *meth;
 931         UBSECerr(UBSEC_F_UBSEC_DH_GENERATE_KEY, UBSEC_R_UNIT_FAILURE);
 932         meth = DH_OpenSSL();
 933         ret = meth->generate_key(dh);
 934         goto err;
 935     }
 936
 937     if (p_UBSEC_diffie_hellman_generate_ioctl(fd,
 938                                               (unsigned char *)priv_key->d,
 939                                               &priv_key_len,
 940                                               (unsigned char *)pub_key->d,
 941                                               &pub_key_len,
 942                                               (unsigned char *)dh->g->d,
 943                                               BN_num_bits(dh->g),
 944                                               (unsigned char *)dh->p->d,
 945                                               BN_num_bits(dh->p), 0, 0,
 946                                               random_bits) != 0) {
 947         /* Hardware's a no go, failover to software */
 948         const DH_METHOD *meth;
 949
 950         UBSECerr(UBSEC_F_UBSEC_DH_GENERATE_KEY, UBSEC_R_REQUEST_FAILED);
 951         p_UBSEC_ubsec_close(fd);
 952
 953         meth = DH_OpenSSL();
 954         ret = meth->generate_key(dh);
 955
 956         goto err;
 957     }
 958
 959     p_UBSEC_ubsec_close(fd);
 960
 961     dh->pub_key = pub_key;
 962     dh->pub_key->top = (pub_key_len + BN_BITS2 - 1) / BN_BITS2;
 963     dh->priv_key = priv_key;
 964     dh->priv_key->top = (priv_key_len + BN_BITS2 - 1) / BN_BITS2;
 965
 966     ret = 1;
 967  err:
 968     return ret;
 969 }
 970 #  endif
 971
 972 #  ifdef NOT_USED
 973 static int ubsec_rand_bytes(unsigned char *buf, int num)
 974 {
 975     int ret = 0, fd;
 976
 977     if ((fd = p_UBSEC_ubsec_open(UBSEC_KEY_DEVICE_NAME)) <= 0) {
 978         const RAND_METHOD *meth;
 979         UBSECerr(UBSEC_F_UBSEC_RAND_BYTES, UBSEC_R_UNIT_FAILURE);
 980         num = p_UBSEC_ubsec_bits_to_bytes(num);
 981         meth = RAND_OpenSSL();
 982         meth->seed(buf, num);
 983         ret = meth->bytes(buf, num);
 984         goto err;
 985     }
 986
 987     num *= 8;                   /* bytes to bits */
 988
 989     if (p_UBSEC_rng_ioctl(fd, UBSEC_RNG_DIRECT, buf, &num) != 0) {
 990         /* Hardware's a no go, failover to software */
 991         const RAND_METHOD *meth;
 992
 993         UBSECerr(UBSEC_F_UBSEC_RAND_BYTES, UBSEC_R_REQUEST_FAILED);
 994         p_UBSEC_ubsec_close(fd);
 995
 996         num = p_UBSEC_ubsec_bits_to_bytes(num);
 997         meth = RAND_OpenSSL();
 998         meth->seed(buf, num);
 999         ret = meth->bytes(buf, num);
1000
1001         goto err;
1002     }
1003
1004     p_UBSEC_ubsec_close(fd);
1005
1006     ret = 1;
1007  err:
1008     return (ret);
1009 }
1010
1011 static int ubsec_rand_status(void)
1012 {
1013     return 0;
1014 }
1015 #  endif
1016
1017 /*
1018  * This stuff is needed if this ENGINE is being compiled into a
1019  * self-contained shared-library.
1020  */
1021 #  ifndef OPENSSL_NO_DYNAMIC_ENGINE
1022 static int bind_fn(ENGINE *e, const char *id)
1023 {
1024     if (id && (strcmp(id, engine_ubsec_id) != 0))
1025         return 0;
1026     if (!bind_helper(e))
1027         return 0;
1028     return 1;
1029 }
1030
1031 IMPLEMENT_DYNAMIC_CHECK_FN()
1032     IMPLEMENT_DYNAMIC_BIND_FN(bind_fn)
1033 #  endif                        /* OPENSSL_NO_DYNAMIC_ENGINE */
1034 # endif                         /* !OPENSSL_NO_HW_UBSEC */
1035 #endif                          /* !OPENSSL_NO_HW */