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 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 static int ubsec_init(ENGINE *e);
  77 static int ubsec_finish(ENGINE *e);
  78 static int ubsec_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f)());
  79 static int ubsec_mod_exp(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
  80                 const BIGNUM *m, BN_CTX *ctx);
  81 static int ubsec_mod_exp_crt(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
  82                         const BIGNUM *q, const BIGNUM *dp,
  83                         const BIGNUM *dq, const BIGNUM *qinv, BN_CTX *ctx);
  84 static int ubsec_rsa_mod_exp(BIGNUM *r0, const BIGNUM *I, RSA *rsa);
  85 static int ubsec_mod_exp_mont(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
  86                 const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx);
  87 #if NOT_USED
  88 static int ubsec_dsa_mod_exp(DSA *dsa, BIGNUM *rr, BIGNUM *a1,
  89                 BIGNUM *p1, BIGNUM *a2, BIGNUM *p2, BIGNUM *m,
  90                 BN_CTX *ctx, BN_MONT_CTX *in_mont);
  91 static int ubsec_mod_exp_dsa(DSA *dsa, BIGNUM *r, BIGNUM *a,
  92                 const BIGNUM *p, const BIGNUM *m, BN_CTX *ctx,
  93                 BN_MONT_CTX *m_ctx);
  94 #endif
  95 static DSA_SIG *ubsec_dsa_do_sign(const unsigned char *dgst, int dlen, DSA *dsa);
  96 static int ubsec_dsa_verify(const unsigned char *dgst, int dgst_len,
  97                                 DSA_SIG *sig, DSA *dsa);
  98 static int ubsec_mod_exp_dh(const DH *dh, BIGNUM *r, const BIGNUM *a,
  99                 const BIGNUM *p, const BIGNUM *m, BN_CTX *ctx,
 100                 BN_MONT_CTX *m_ctx);
 101 static int ubsec_dh_compute_key(unsigned char *key,const BIGNUM *pub_key,DH *dh);
 102 static int ubsec_dh_generate_key(DH *dh);
 103
 104 #if NOT_USED
 105 static int ubsec_rand_bytes(unsigned char *buf, int num);
 106 static int ubsec_rand_status(void);
 107 #endif
 108
 109 #define UBSEC_CMD_SO_PATH               ENGINE_CMD_BASE
 110 static const ENGINE_CMD_DEFN ubsec_cmd_defns[] = {
 111         {UBSEC_CMD_SO_PATH,
 112                 "SO_PATH",
 113                 "Specifies the path to the 'ubsec' shared library",
 114                 ENGINE_CMD_FLAG_STRING},
 115         {0, NULL, NULL, 0}
 116         };
 117
 118 /* Our internal RSA_METHOD that we provide pointers to */
 119
 120 static RSA_METHOD ubsec_rsa =
 121         {
 122         "UBSEC RSA method",
 123         NULL,
 124         NULL,
 125         NULL,
 126         NULL,
 127         ubsec_rsa_mod_exp,
 128         ubsec_mod_exp_mont,
 129         NULL,
 130         NULL,
 131         0,
 132         NULL,
 133         NULL,
 134         NULL
 135         };
 136
 137 /* Our internal DSA_METHOD that we provide pointers to */
 138 static DSA_METHOD ubsec_dsa =
 139         {
 140         "UBSEC DSA method",
 141         ubsec_dsa_do_sign, /* dsa_do_sign */
 142         NULL, /* dsa_sign_setup */
 143         ubsec_dsa_verify, /* dsa_do_verify */
 144         NULL, /* ubsec_dsa_mod_exp */ /* dsa_mod_exp */
 145         NULL, /* ubsec_mod_exp_dsa */ /* bn_mod_exp */
 146         NULL, /* init */
 147         NULL, /* finish */
 148         0, /* flags */
 149         NULL /* app_data */
 150         };
 151
 152 /* Our internal DH_METHOD that we provide pointers to */
 153 static DH_METHOD ubsec_dh =
 154         {
 155         "UBSEC DH method",
 156         ubsec_dh_generate_key,
 157         ubsec_dh_compute_key,
 158         ubsec_mod_exp_dh,
 159         NULL,
 160         NULL,
 161         0,
 162         NULL
 163         };
 164
 165 /* Constants used when creating the ENGINE */
 166 static const char *engine_ubsec_id = "ubsec";
 167 static const char *engine_ubsec_name = "UBSEC hardware engine support";
 168
 169 /* As this is only ever called once, there's no need for locking
 170  * (indeed - the lock will already be held by our caller!!!) */
 171 ENGINE *ENGINE_ubsec()
 172         {
 173         const RSA_METHOD *meth1;
 174 #ifndef HAVE_UBSEC_DH
 175         const DH_METHOD *meth3;
 176 #endif /* HAVE_UBSEC_DH */
 177         ENGINE *ret = ENGINE_new();
 178         if(!ret)
 179                 return NULL;
 180         if(!ENGINE_set_id(ret, engine_ubsec_id) ||
 181                         !ENGINE_set_name(ret, engine_ubsec_name) ||
 182                         !ENGINE_set_RSA(ret, &ubsec_rsa) ||
 183                         !ENGINE_set_DSA(ret, &ubsec_dsa) ||
 184                         !ENGINE_set_DH(ret, &ubsec_dh) ||
 185                         !ENGINE_set_BN_mod_exp(ret, ubsec_mod_exp) ||
 186                         !ENGINE_set_BN_mod_exp_crt(ret, ubsec_mod_exp_crt) ||
 187                         !ENGINE_set_init_function(ret, ubsec_init) ||
 188                         !ENGINE_set_finish_function(ret, ubsec_finish) ||
 189                         !ENGINE_set_ctrl_function(ret, ubsec_ctrl) ||
 190                         !ENGINE_set_cmd_defns(ret, ubsec_cmd_defns))
 191                 {
 192                 ENGINE_free(ret);
 193                 return NULL;
 194                 }
 195
 196         /* We know that the "PKCS1_SSLeay()" functions hook properly
 197          * to the Broadcom-specific mod_exp and mod_exp_crt so we use
 198          * those functions. NB: We don't use ENGINE_openssl() or
 199          * anything "more generic" because something like the RSAref
 200          * code may not hook properly, and if you own one of these
 201          * cards then you have the right to do RSA operations on it
 202          * anyway! */
 203         meth1 = RSA_PKCS1_SSLeay();
 204         ubsec_rsa.rsa_pub_enc = meth1->rsa_pub_enc;
 205         ubsec_rsa.rsa_pub_dec = meth1->rsa_pub_dec;
 206         ubsec_rsa.rsa_priv_enc = meth1->rsa_priv_enc;
 207         ubsec_rsa.rsa_priv_dec = meth1->rsa_priv_dec;
 208
 209 #ifndef HAVE_UBSEC_DH
 210         /* Much the same for Diffie-Hellman */
 211         meth3 = DH_OpenSSL();
 212         ubsec_dh.generate_key = meth3->generate_key;
 213         ubsec_dh.compute_key = meth3->compute_key;
 214 #endif /* HAVE_UBSEC_DH */
 215
 216         return ret;
 217         }
 218
 219 /* This is a process-global DSO handle used for loading and unloading
 220  * the UBSEC library. NB: This is only set (or unset) during an
 221  * init() or finish() call (reference counts permitting) and they're
 222  * operating with global locks, so this should be thread-safe
 223  * implicitly. */
 224
 225 static DSO *ubsec_dso = NULL;
 226
 227 /* These are the function pointers that are (un)set when the library has
 228  * successfully (un)loaded. */
 229
 230 static t_UBSEC_ubsec_bytes_to_bits *p_UBSEC_ubsec_bytes_to_bits = NULL;
 231 static t_UBSEC_ubsec_bits_to_bytes *p_UBSEC_ubsec_bits_to_bytes = NULL;
 232 static t_UBSEC_ubsec_open *p_UBSEC_ubsec_open = NULL;
 233 static t_UBSEC_ubsec_close *p_UBSEC_ubsec_close = NULL;
 234 static t_UBSEC_diffie_hellman_generate_ioctl
 235         *p_UBSEC_diffie_hellman_generate_ioctl = NULL;
 236 static t_UBSEC_diffie_hellman_agree_ioctl *p_UBSEC_diffie_hellman_agree_ioctl = NULL;
 237 static t_UBSEC_rsa_mod_exp_ioctl *p_UBSEC_rsa_mod_exp_ioctl = NULL;
 238 static t_UBSEC_rsa_mod_exp_crt_ioctl *p_UBSEC_rsa_mod_exp_crt_ioctl = NULL;
 239 static t_UBSEC_dsa_sign_ioctl *p_UBSEC_dsa_sign_ioctl = NULL;
 240 static t_UBSEC_dsa_verify_ioctl *p_UBSEC_dsa_verify_ioctl = NULL;
 241 static t_UBSEC_math_accelerate_ioctl *p_UBSEC_math_accelerate_ioctl = NULL;
 242 static t_UBSEC_rng_ioctl *p_UBSEC_rng_ioctl = NULL;
 243
 244 /*
 245  * These are the static string constants for the DSO file name and the function
 246  * symbol names to bind to.
 247  */
 248
 249 static const char *UBSEC_LIBNAME = "ubsec";
 250 static const char *UBSEC_F1 = "ubsec_bytes_to_bits";
 251 static const char *UBSEC_F2 = "ubsec_bits_to_bytes";
 252 static const char *UBSEC_F3 = "ubsec_open";
 253 static const char *UBSEC_F4 = "ubsec_close";
 254 static const char *UBSEC_F5 = "diffie_hellman_generate_ioctl";
 255 static const char *UBSEC_F6 = "diffie_hellman_agree_ioctl";
 256 static const char *UBSEC_F7 = "rsa_mod_exp_ioctl";
 257 static const char *UBSEC_F8 = "rsa_mod_exp_crt_ioctl";
 258 static const char *UBSEC_F9 = "dsa_sign_ioctl";
 259 static const char *UBSEC_F10 = "dsa_verify_ioctl";
 260 static const char *UBSEC_F11 = "math_accelerate_ioctl";
 261 static const char *UBSEC_F12 = "rng_ioctl";
 262
 263 /* (de)initialisation functions. */
 264 static int ubsec_init(ENGINE *e)
 265         {
 266         t_UBSEC_ubsec_bytes_to_bits *p1;
 267         t_UBSEC_ubsec_bits_to_bytes *p2;
 268         t_UBSEC_ubsec_open *p3;
 269         t_UBSEC_ubsec_close *p4;
 270         t_UBSEC_diffie_hellman_generate_ioctl *p5;
 271         t_UBSEC_diffie_hellman_agree_ioctl *p6;
 272         t_UBSEC_rsa_mod_exp_ioctl *p7;
 273         t_UBSEC_rsa_mod_exp_crt_ioctl *p8;
 274         t_UBSEC_dsa_sign_ioctl *p9;
 275         t_UBSEC_dsa_verify_ioctl *p10;
 276         t_UBSEC_math_accelerate_ioctl *p11;
 277         t_UBSEC_rng_ioctl *p12;
 278         int fd = 0;
 279
 280         if(ubsec_dso != NULL)
 281                 {
 282                 ENGINEerr(ENGINE_F_UBSEC_INIT, ENGINE_R_ALREADY_LOADED);
 283                 goto err;
 284                 }
 285         /*
 286          * Attempt to load libubsec.so/ubsec.dll/whatever.
 287          */
 288         ubsec_dso = DSO_load(NULL, UBSEC_LIBNAME, NULL, 0);
 289         if(ubsec_dso == NULL)
 290                 {
 291                 ENGINEerr(ENGINE_F_UBSEC_INIT, ENGINE_R_DSO_FAILURE);
 292                 goto err;
 293                 }
 294
 295         if (
 296         !(p1 = (t_UBSEC_ubsec_bytes_to_bits *) DSO_bind_func(ubsec_dso, UBSEC_F1)) ||
 297         !(p2 = (t_UBSEC_ubsec_bits_to_bytes *) DSO_bind_func(ubsec_dso, UBSEC_F2)) ||
 298         !(p3 = (t_UBSEC_ubsec_open *) DSO_bind_func(ubsec_dso, UBSEC_F3)) ||
 299         !(p4 = (t_UBSEC_ubsec_close *) DSO_bind_func(ubsec_dso, UBSEC_F4)) ||
 300         !(p5 = (t_UBSEC_diffie_hellman_generate_ioctl *)
 301                                 DSO_bind_func(ubsec_dso, UBSEC_F5)) ||
 302         !(p6 = (t_UBSEC_diffie_hellman_agree_ioctl *)
 303                                 DSO_bind_func(ubsec_dso, UBSEC_F6)) ||
 304         !(p7 = (t_UBSEC_rsa_mod_exp_ioctl *) DSO_bind_func(ubsec_dso, UBSEC_F7)) ||
 305         !(p8 = (t_UBSEC_rsa_mod_exp_crt_ioctl *) DSO_bind_func(ubsec_dso, UBSEC_F8)) ||
 306         !(p9 = (t_UBSEC_dsa_sign_ioctl *) DSO_bind_func(ubsec_dso, UBSEC_F9)) ||
 307         !(p10 = (t_UBSEC_dsa_verify_ioctl *) DSO_bind_func(ubsec_dso, UBSEC_F10)) ||
 308         !(p11 = (t_UBSEC_math_accelerate_ioctl *)
 309                                 DSO_bind_func(ubsec_dso, UBSEC_F11)) ||
 310         !(p12 = (t_UBSEC_rng_ioctl *) DSO_bind_func(ubsec_dso, UBSEC_F12)))
 311                 {
 312                 ENGINEerr(ENGINE_F_UBSEC_INIT, ENGINE_R_DSO_FAILURE);
 313                 goto err;
 314                 }
 315
 316         /* Copy the pointers */
 317         p_UBSEC_ubsec_bytes_to_bits = p1;
 318         p_UBSEC_ubsec_bits_to_bytes = p2;
 319         p_UBSEC_ubsec_open = p3;
 320         p_UBSEC_ubsec_close = p4;
 321         p_UBSEC_diffie_hellman_generate_ioctl = p5;
 322         p_UBSEC_diffie_hellman_agree_ioctl = p6;
 323         p_UBSEC_rsa_mod_exp_ioctl = p7;
 324         p_UBSEC_rsa_mod_exp_crt_ioctl = p8;
 325         p_UBSEC_dsa_sign_ioctl = p9;
 326         p_UBSEC_dsa_verify_ioctl = p10;
 327         p_UBSEC_math_accelerate_ioctl = p11;
 328         p_UBSEC_rng_ioctl = p12;
 329
 330         /* Perform an open to see if there's actually any unit running. */
 331         if ((fd = p_UBSEC_ubsec_open(UBSEC_KEY_DEVICE_NAME)) > 0)
 332                 {
 333                 p_UBSEC_ubsec_close(fd);
 334                 return 1;
 335                 }
 336         else
 337                 {
 338                 ENGINEerr(ENGINE_F_UBSEC_INIT, ENGINE_R_UNIT_FAILURE);
 339                 }
 340
 341 err:
 342         if(ubsec_dso)
 343                 DSO_free(ubsec_dso);
 344         p_UBSEC_ubsec_bytes_to_bits = NULL;
 345         p_UBSEC_ubsec_bits_to_bytes = NULL;
 346         p_UBSEC_ubsec_open = NULL;
 347         p_UBSEC_ubsec_close = NULL;
 348         p_UBSEC_diffie_hellman_generate_ioctl = NULL;
 349         p_UBSEC_diffie_hellman_agree_ioctl = NULL;
 350         p_UBSEC_rsa_mod_exp_ioctl = NULL;
 351         p_UBSEC_rsa_mod_exp_crt_ioctl = NULL;
 352         p_UBSEC_dsa_sign_ioctl = NULL;
 353         p_UBSEC_dsa_verify_ioctl = NULL;
 354         p_UBSEC_math_accelerate_ioctl = NULL;
 355         p_UBSEC_rng_ioctl = NULL;
 356
 357         return 0;
 358         }
 359
 360 static int ubsec_finish(ENGINE *e)
 361         {
 362         if(ubsec_dso == NULL)
 363                 {
 364                 ENGINEerr(ENGINE_F_UBSEC_FINISH, ENGINE_R_NOT_LOADED);
 365                 return 0;
 366                 }
 367         if(!DSO_free(ubsec_dso))
 368                 {
 369                 ENGINEerr(ENGINE_F_UBSEC_FINISH, ENGINE_R_DSO_FAILURE);
 370                 return 0;
 371                 }
 372         ubsec_dso = NULL;
 373         p_UBSEC_ubsec_bytes_to_bits = NULL;
 374         p_UBSEC_ubsec_bits_to_bytes = NULL;
 375         p_UBSEC_ubsec_open = NULL;
 376         p_UBSEC_ubsec_close = NULL;
 377         p_UBSEC_diffie_hellman_generate_ioctl = NULL;
 378         p_UBSEC_diffie_hellman_agree_ioctl = NULL;
 379         p_UBSEC_rsa_mod_exp_ioctl = NULL;
 380         p_UBSEC_rsa_mod_exp_crt_ioctl = NULL;
 381         p_UBSEC_dsa_sign_ioctl = NULL;
 382         p_UBSEC_dsa_verify_ioctl = NULL;
 383         p_UBSEC_math_accelerate_ioctl = NULL;
 384         p_UBSEC_rng_ioctl = NULL;
 385         return 1;
 386         }
 387
 388 static int ubsec_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f)())
 389         {
 390         int initialised = ((ubsec_dso == NULL) ? 0 : 1);
 391         switch(cmd)
 392                 {
 393         case UBSEC_CMD_SO_PATH:
 394                 if(p == NULL)
 395                         {
 396                         ENGINEerr(ENGINE_F_UBSEC_CTRL,ERR_R_PASSED_NULL_PARAMETER);
 397                         return 0;
 398                         }
 399                 if(initialised)
 400                         {
 401                         ENGINEerr(ENGINE_F_UBSEC_CTRL,ENGINE_R_ALREADY_LOADED);
 402                         return 0;
 403                         }
 404                 UBSEC_LIBNAME = (const char *)p;
 405                 return 1;
 406         default:
 407                 break;
 408                 }
 409         ENGINEerr(ENGINE_F_UBSEC_CTRL,ENGINE_R_CTRL_COMMAND_NOT_IMPLEMENTED);
 410         return 0;
 411         }
 412
 413 static int ubsec_mod_exp(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
 414                 const BIGNUM *m, BN_CTX *ctx)
 415         {
 416         int     y_len = 0;
 417         int     fd;
 418
 419         if(ubsec_dso == NULL)
 420         {
 421                 ENGINEerr(ENGINE_F_UBSEC_MOD_EXP, ENGINE_R_NOT_LOADED);
 422                 return 0;
 423         }
 424
 425         /* Check if hardware can't handle this argument. */
 426         y_len = BN_num_bits(m);
 427         if (y_len > 1024) {
 428                 ENGINEerr(ENGINE_F_UBSEC_MOD_EXP, ENGINE_R_SIZE_TOO_LARGE_OR_TOO_SMALL);
 429                 return 0;
 430         }
 431
 432         if(!bn_wexpand(r, m->top))
 433         {
 434                 ENGINEerr(ENGINE_F_UBSEC_MOD_EXP, ENGINE_R_BN_EXPAND_FAIL);
 435                 return 0;
 436         }
 437         memset(r->d, 0, BN_num_bytes(m));
 438
 439         if ((fd = p_UBSEC_ubsec_open(UBSEC_KEY_DEVICE_NAME)) <= 0) {
 440                 fd = 0;
 441                 ENGINEerr(ENGINE_F_UBSEC_INIT, ENGINE_R_UNIT_FAILURE);
 442                 return 0;
 443         }
 444
 445         if (p_UBSEC_rsa_mod_exp_ioctl(fd, (unsigned char *)a->d, BN_num_bits(a),
 446                 (unsigned char *)m->d, BN_num_bits(m), (unsigned char *)p->d,
 447                 BN_num_bits(p), (unsigned char *)r->d, &y_len) != 0)
 448         {
 449                 ENGINEerr(ENGINE_F_UBSEC_MOD_EXP, ENGINE_R_REQUEST_FAILED);
 450                 return 0;
 451         }
 452
 453         p_UBSEC_ubsec_close(fd);
 454
 455         r->top = (BN_num_bits(m)+BN_BITS2-1)/BN_BITS2;
 456         return 1;
 457         }
 458
 459 static int ubsec_rsa_mod_exp(BIGNUM *r0, const BIGNUM *I, RSA *rsa)
 460         {
 461         BN_CTX *ctx;
 462         int to_return = 0;
 463
 464         if((ctx = BN_CTX_new()) == NULL)
 465                 goto err;
 466
 467         if(!rsa->p || !rsa->q || !rsa->dmp1 || !rsa->dmq1 || !rsa->iqmp)
 468                 {
 469                 ENGINEerr(ENGINE_F_UBSEC_RSA_MOD_EXP, ENGINE_R_MISSING_KEY_COMPONENTS);
 470                 goto err;
 471                 }
 472
 473         /*
 474          * Do in software if argument is too large for hardware.
 475          */
 476         if ((BN_num_bits(rsa->p)+BN_num_bits(rsa->q)) > 1024) {
 477                 const RSA_METHOD *meth = RSA_PKCS1_SSLeay();
 478                 to_return = (*meth->rsa_mod_exp)(r0, I, rsa);
 479         } else {
 480                 to_return = ubsec_mod_exp_crt(r0, I, rsa->p, rsa->q, rsa->dmp1,
 481                         rsa->dmq1, rsa->iqmp, ctx);
 482         }
 483 err:
 484         if(ctx)
 485                 BN_CTX_free(ctx);
 486         return to_return;
 487         }
 488
 489 static int ubsec_mod_exp_crt(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
 490                         const BIGNUM *q, const BIGNUM *dp,
 491                         const BIGNUM *dq, const BIGNUM *qinv, BN_CTX *ctx)
 492         {
 493         int     y_len,
 494                 m_len,
 495                 fd;
 496
 497         m_len = BN_num_bytes(p) + BN_num_bytes(q) + 1;
 498         y_len = BN_num_bits(p) + BN_num_bits(q);
 499
 500         /* Check if hardware can't handle this argument. */
 501         if (y_len > 1024) {
 502                 ENGINEerr(ENGINE_F_UBSEC_MOD_EXP, ENGINE_R_SIZE_TOO_LARGE_OR_TOO_SMALL);
 503                 return 0;
 504         }
 505
 506         if (!bn_wexpand(r, p->top + q->top + 1)) {
 507                 ENGINEerr(ENGINE_F_UBSEC_RSA_MOD_EXP_CRT, ENGINE_R_BN_EXPAND_FAIL);
 508                 return 0;
 509         }
 510
 511         if ((fd = p_UBSEC_ubsec_open(UBSEC_KEY_DEVICE_NAME)) <= 0) {
 512                 fd = 0;
 513                 ENGINEerr(ENGINE_F_UBSEC_INIT, ENGINE_R_UNIT_FAILURE);
 514                 return 0;
 515         }
 516
 517         if (p_UBSEC_rsa_mod_exp_crt_ioctl(fd,
 518                 (unsigned char *)a->d, BN_num_bits(a),
 519                 (unsigned char *)qinv->d, BN_num_bits(qinv),
 520                 (unsigned char *)dp->d, BN_num_bits(dp),
 521                 (unsigned char *)p->d, BN_num_bits(p),
 522                 (unsigned char *)dq->d, BN_num_bits(dq),
 523                 (unsigned char *)q->d, BN_num_bits(q),
 524                 (unsigned char *)r->d,  &y_len) != 0) {
 525                 ENGINEerr(ENGINE_F_UBSEC_MOD_EXP, ENGINE_R_REQUEST_FAILED);
 526                 return 0;
 527         }
 528
 529         p_UBSEC_ubsec_close(fd);
 530
 531         r->top = (BN_num_bits(p) + BN_num_bits(q) + BN_BITS2 - 1)/BN_BITS2;
 532         return 1;
 533 }
 534
 535 #if NOT_USED
 536 static int ubsec_dsa_mod_exp(DSA *dsa, BIGNUM *rr, BIGNUM *a1,
 537                 BIGNUM *p1, BIGNUM *a2, BIGNUM *p2, BIGNUM *m,
 538                 BN_CTX *ctx, BN_MONT_CTX *in_mont)
 539         {
 540         BIGNUM t;
 541         int to_return = 0;
 542
 543         BN_init(&t);
 544         /* let rr = a1 ^ p1 mod m */
 545         if (!ubsec_mod_exp(rr,a1,p1,m,ctx)) goto end;
 546         /* let t = a2 ^ p2 mod m */
 547         if (!ubsec_mod_exp(&t,a2,p2,m,ctx)) goto end;
 548         /* let rr = rr * t mod m */
 549         if (!BN_mod_mul(rr,rr,&t,m,ctx)) goto end;
 550         to_return = 1;
 551 end:
 552         BN_free(&t);
 553         return to_return;
 554         }
 555
 556 static int ubsec_mod_exp_dsa(DSA *dsa, BIGNUM *r, BIGNUM *a,
 557                 const BIGNUM *p, const BIGNUM *m, BN_CTX *ctx,
 558                 BN_MONT_CTX *m_ctx)
 559         {
 560         return ubsec_mod_exp(r, a, p, m, ctx);
 561         }
 562 #endif
 563
 564 /*
 565  * This function is aliased to mod_exp (with the mont stuff dropped).
 566  */
 567 static int ubsec_mod_exp_mont(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
 568                 const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx)
 569 {
 570         int ret = 0;
 571
 572         /* Do in software if the key is too large for the hardware. */
 573         if (BN_num_bits(m) > 1024) {
 574                 const RSA_METHOD *meth = RSA_PKCS1_SSLeay();
 575                 ret = (*meth->bn_mod_exp)(r, a, p, m, ctx, m_ctx);
 576         } else {
 577                 ret = ubsec_mod_exp(r, a, p, m, ctx);
 578         }
 579
 580         return ret;
 581 }
 582
 583 /* This function is aliased to mod_exp (with the dh and mont dropped). */
 584 static int ubsec_mod_exp_dh(const DH *dh, BIGNUM *r, const BIGNUM *a,
 585                 const BIGNUM *p, const BIGNUM *m, BN_CTX *ctx,
 586                 BN_MONT_CTX *m_ctx)
 587         {
 588         return ubsec_mod_exp(r, a, p, m, ctx);
 589         }
 590
 591 static DSA_SIG *ubsec_dsa_do_sign(const unsigned char *dgst, int dlen, DSA *dsa)
 592         {
 593         DSA_SIG *to_return = NULL;
 594         int s_len = 160, r_len = 160, d_len, fd;
 595         BIGNUM m, *r=NULL, *s=NULL;
 596
 597         BN_init(&m);
 598
 599         s = BN_new();
 600         r = BN_new();
 601         if ((s == NULL) || (r==NULL))
 602                 goto err;
 603
 604         d_len = p_UBSEC_ubsec_bytes_to_bits((unsigned char *)dgst, dlen);
 605
 606         if(!bn_wexpand(r, (160+BN_BITS2-1)/BN_BITS2) ||
 607            (!bn_wexpand(s, (160+BN_BITS2-1)/BN_BITS2))) {
 608                 ENGINEerr(ENGINE_F_UBSEC_DSA_SIGN, ENGINE_R_BN_EXPAND_FAIL);
 609                 goto err;
 610         }
 611
 612         if (BN_bin2bn(dgst,dlen,&m) == NULL) {
 613                 ENGINEerr(ENGINE_F_UBSEC_DSA_SIGN, ENGINE_R_BN_EXPAND_FAIL);
 614                 goto err;
 615         }
 616
 617         if ((fd = p_UBSEC_ubsec_open(UBSEC_KEY_DEVICE_NAME)) <= 0) {
 618                 fd = 0;
 619                 ENGINEerr(ENGINE_F_UBSEC_INIT, ENGINE_R_UNIT_FAILURE);
 620                 return 0;
 621         }
 622
 623         if (p_UBSEC_dsa_sign_ioctl(fd, 0, /* compute hash before signing */
 624                 (unsigned char *)dgst, d_len,
 625                 NULL, 0,  /* compute random value */
 626                 (unsigned char *)dsa->p->d, BN_num_bits(dsa->p),
 627                 (unsigned char *)dsa->q->d, BN_num_bits(dsa->q),
 628                 (unsigned char *)dsa->g->d, BN_num_bits(dsa->g),
 629                 (unsigned char *)dsa->priv_key->d, BN_num_bits(dsa->priv_key),
 630                 (unsigned char *)r->d, &r_len,
 631                 (unsigned char *)s->d, &s_len ) != 0) {
 632                 ENGINEerr(ENGINE_F_UBSEC_DSA_SIGN, ENGINE_R_REQUEST_FAILED);
 633                 goto err;
 634         }
 635
 636         p_UBSEC_ubsec_close(fd);
 637
 638         r->top = (160+BN_BITS2-1)/BN_BITS2;
 639         s->top = (160+BN_BITS2-1)/BN_BITS2;
 640
 641         to_return = DSA_SIG_new();
 642         if(to_return == NULL) {
 643                 ENGINEerr(ENGINE_F_UBSEC_DSA_SIGN, ENGINE_R_BN_EXPAND_FAIL);
 644                 goto err;
 645         }
 646
 647         to_return->r = r;
 648         to_return->s = s;
 649
 650 err:
 651         if (!to_return) {
 652                 if (r) BN_free(r);
 653                 if (s) BN_free(s);
 654         }
 655         BN_clear_free(&m);
 656         return to_return;
 657 }
 658
 659 static int ubsec_dsa_verify(const unsigned char *dgst, int dgst_len,
 660                                 DSA_SIG *sig, DSA *dsa)
 661         {
 662         int v_len, d_len;
 663         int to_return = 0;
 664         int fd;
 665         BIGNUM v;
 666
 667         BN_init(&v);
 668
 669         if(!bn_wexpand(&v, dsa->p->top)) {
 670                 ENGINEerr(ENGINE_F_UBSEC_DSA_VERIFY ,ENGINE_R_BN_EXPAND_FAIL);
 671                 goto err;
 672         }
 673
 674         v_len = BN_num_bits(dsa->p);
 675
 676         d_len = p_UBSEC_ubsec_bytes_to_bits((unsigned char *)dgst, dgst_len);
 677
 678         if ((fd = p_UBSEC_ubsec_open(UBSEC_KEY_DEVICE_NAME)) <= 0) {
 679                 fd = 0;
 680                 ENGINEerr(ENGINE_F_UBSEC_INIT, ENGINE_R_UNIT_FAILURE);
 681                 return 0;
 682         }
 683
 684         if (p_UBSEC_dsa_verify_ioctl(fd, 0, /* compute hash before signing */
 685                 (unsigned char *)dgst, d_len,
 686                 (unsigned char *)dsa->p->d, BN_num_bits(dsa->p),
 687                 (unsigned char *)dsa->q->d, BN_num_bits(dsa->q),
 688                 (unsigned char *)dsa->g->d, BN_num_bits(dsa->g),
 689                 (unsigned char *)dsa->pub_key->d, BN_num_bits(dsa->pub_key),
 690                 (unsigned char *)sig->r->d, BN_num_bits(sig->r),
 691                 (unsigned char *)sig->s->d, BN_num_bits(sig->s),
 692                 (unsigned char *)v.d, &v_len) != 0) {
 693                 ENGINEerr(ENGINE_F_UBSEC_DSA_VERIFY , ENGINE_R_REQUEST_FAILED);
 694                 goto err;
 695         }
 696
 697         p_UBSEC_ubsec_close(fd);
 698
 699         to_return = 1;
 700 err:
 701         BN_clear_free(&v);
 702         return to_return;
 703         }
 704
 705 static int ubsec_dh_compute_key (unsigned char *key,const BIGNUM *pub_key,DH *dh)
 706         {
 707         return 0;
 708         }
 709
 710 static int ubsec_dh_generate_key (DH *dh)
 711         {
 712         return 0;
 713         }
 714
 715 #ifdef NOT_USED
 716 static int ubsec_rand_bytes(unsigned char *buf, int num)
 717         {
 718         return 0;
 719         }
 720
 721 static int ubsec_rand_status(void)
 722         {
 723         return 0;
 724         }
 725 #endif
 726
 727 #endif /* !OPENSSL_NO_HW_UBSEC */
 728 #endif /* !OPENSSL_NO_HW */