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