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e_aep.c
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1 /* ====================================================================
2  * Copyright (c) 1999 The OpenSSL Project. All rights reserved.
3  *
4  * Redistribution and use in source and binary forms, with or without
5  * modification, are permitted provided that the following conditions
6  * are met:
7  *
8  * 1. Redistributions of source code must retain the above copyright
9  * notice, this list of conditions and the following disclaimer.
10  *
11  * 2. Redistributions in binary form must reproduce the above copyright
12  * notice, this list of conditions and the following disclaimer in
13  * the documentation and/or other materials provided with the
14  * distribution.
15  *
16  * 3. All advertising materials mentioning features or use of this
17  * software must display the following acknowledgment:
18  * "This product includes software developed by the OpenSSL Project
19  * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
20  *
21  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
22  * endorse or promote products derived from this software without
23  * prior written permission. For written permission, please contact
24  * [email protected].
25  *
26  * 5. Products derived from this software may not be called "OpenSSL"
27  * nor may "OpenSSL" appear in their names without prior written
28  * permission of the OpenSSL Project.
29  *
30  * 6. Redistributions of any form whatsoever must retain the following
31  * acknowledgment:
32  * "This product includes software developed by the OpenSSL Project
33  * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
34  *
35  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
36  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
37  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
38  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
39  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
40  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
41  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
42  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
43  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
44  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
45  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
46  * OF THE POSSIBILITY OF SUCH DAMAGE.
47  * ====================================================================
48  *
49  * This product includes cryptographic software written by Eric Young
50  * ([email protected]). This product includes software written by Tim
51  * Hudson ([email protected]).
52  *
53  */
54 
55 #include <stdio.h>
56 #include <openssl/bn.h>
57 #include <string.h>
58 
59 #include <openssl/e_os2.h>
60 #if !defined(OPENSSL_SYS_MSDOS) || defined(__DJGPP__) || defined(__MINGW32__)
61 #include <sys/types.h>
62 #include <unistd.h>
63 #else
64 #include <process.h>
65 typedef int pid_t;
66 #endif
67 
68 #if defined(OPENSSL_SYS_NETWARE) && defined(NETWARE_CLIB)
69 #define getpid GetThreadID
70 extern int GetThreadID(void);
71 #elif defined(_WIN32) && !defined(__WATCOMC__)
72 #define getpid _getpid
73 #endif
74 
75 #include <openssl/crypto.h>
76 #include <openssl/dso.h>
77 #include <openssl/engine.h>
78 #include <openssl/buffer.h>
79 #ifndef OPENSSL_NO_RSA
80 #include <openssl/rsa.h>
81 #endif
82 #ifndef OPENSSL_NO_DSA
83 #include <openssl/dsa.h>
84 #endif
85 #ifndef OPENSSL_NO_DH
86 #include <openssl/dh.h>
87 #endif
88 
89 #ifndef OPENSSL_NO_HW
90 #ifndef OPENSSL_NO_HW_AEP
91 #ifdef FLAT_INC
92 #include "aep.h"
93 #else
94 #include "vendor_defns/aep.h"
95 #endif
96 
97 #define AEP_LIB_NAME "aep engine"
98 #define FAIL_TO_SW 0x10101010
99 
100 #include "e_aep_err.c"
101 
102 static int aep_init(ENGINE *e);
103 static int aep_finish(ENGINE *e);
104 static int aep_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f)(void));
105 static int aep_destroy(ENGINE *e);
106 
107 static AEP_RV aep_get_connection(AEP_CONNECTION_HNDL_PTR hConnection);
108 static AEP_RV aep_return_connection(AEP_CONNECTION_HNDL hConnection);
109 static AEP_RV aep_close_connection(AEP_CONNECTION_HNDL hConnection);
110 static AEP_RV aep_close_all_connections(int use_engine_lock, int *in_use);
111 
112 /* BIGNUM stuff */
113 #ifndef OPENSSL_NO_RSA
114 static int aep_mod_exp(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
115  const BIGNUM *m, BN_CTX *ctx);
116 
117 static AEP_RV aep_mod_exp_crt(BIGNUM *r,const BIGNUM *a, const BIGNUM *p,
118  const BIGNUM *q, const BIGNUM *dmp1,const BIGNUM *dmq1,
119  const BIGNUM *iqmp, BN_CTX *ctx);
120 #endif
121 
122 /* RSA stuff */
123 #ifndef OPENSSL_NO_RSA
124 static int aep_rsa_mod_exp(BIGNUM *r0, const BIGNUM *I, RSA *rsa, BN_CTX *ctx);
125 #endif
126 
127 /* This function is aliased to mod_exp (with the mont stuff dropped). */
128 #ifndef OPENSSL_NO_RSA
129 static int aep_mod_exp_mont(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
130  const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx);
131 #endif
132 
133 /* DSA stuff */
134 #ifndef OPENSSL_NO_DSA
135 static int aep_dsa_mod_exp(DSA *dsa, BIGNUM *rr, BIGNUM *a1,
136  BIGNUM *p1, BIGNUM *a2, BIGNUM *p2, BIGNUM *m,
137  BN_CTX *ctx, BN_MONT_CTX *in_mont);
138 
139 static int aep_mod_exp_dsa(DSA *dsa, BIGNUM *r, BIGNUM *a,
140  const BIGNUM *p, const BIGNUM *m, BN_CTX *ctx,
141  BN_MONT_CTX *m_ctx);
142 #endif
143 
144 /* DH stuff */
145 /* This function is aliased to mod_exp (with the DH and mont dropped). */
146 #ifndef OPENSSL_NO_DH
147 static int aep_mod_exp_dh(const DH *dh, BIGNUM *r, const BIGNUM *a,
148  const BIGNUM *p, const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx);
149 #endif
150 
151 /* rand stuff */
152 #ifdef AEPRAND
153 static int aep_rand(unsigned char *buf, int num);
154 static int aep_rand_status(void);
155 #endif
156 
157 /* Bignum conversion stuff */
158 static AEP_RV GetBigNumSize(AEP_VOID_PTR ArbBigNum, AEP_U32* BigNumSize);
159 static AEP_RV MakeAEPBigNum(AEP_VOID_PTR ArbBigNum, AEP_U32 BigNumSize,
160  unsigned char* AEP_BigNum);
161 static AEP_RV ConvertAEPBigNum(void* ArbBigNum, AEP_U32 BigNumSize,
162  unsigned char* AEP_BigNum);
163 
164 /* The definitions for control commands specific to this engine */
165 #define AEP_CMD_SO_PATH ENGINE_CMD_BASE
166 static const ENGINE_CMD_DEFN aep_cmd_defns[] =
167  {
168  { AEP_CMD_SO_PATH,
169  "SO_PATH",
170  "Specifies the path to the 'aep' shared library",
171  ENGINE_CMD_FLAG_STRING
172  },
173  {0, NULL, NULL, 0}
174  };
175 
176 #ifndef OPENSSL_NO_RSA
177 /* Our internal RSA_METHOD that we provide pointers to */
178 static RSA_METHOD aep_rsa =
179  {
180  "Aep RSA method",
181  NULL, /*rsa_pub_encrypt*/
182  NULL, /*rsa_pub_decrypt*/
183  NULL, /*rsa_priv_encrypt*/
184  NULL, /*rsa_priv_encrypt*/
185  aep_rsa_mod_exp, /*rsa_mod_exp*/
186  aep_mod_exp_mont, /*bn_mod_exp*/
187  NULL, /*init*/
188  NULL, /*finish*/
189  0, /*flags*/
190  NULL, /*app_data*/
191  NULL, /*rsa_sign*/
192  NULL, /*rsa_verify*/
193  NULL /*rsa_keygen*/
194  };
195 #endif
196 
197 #ifndef OPENSSL_NO_DSA
198 /* Our internal DSA_METHOD that we provide pointers to */
199 static DSA_METHOD aep_dsa =
200  {
201  "Aep DSA method",
202  NULL, /* dsa_do_sign */
203  NULL, /* dsa_sign_setup */
204  NULL, /* dsa_do_verify */
205  aep_dsa_mod_exp, /* dsa_mod_exp */
206  aep_mod_exp_dsa, /* bn_mod_exp */
207  NULL, /* init */
208  NULL, /* finish */
209  0, /* flags */
210  NULL, /* app_data */
211  NULL, /* dsa_paramgen */
212  NULL /* dsa_keygen */
213  };
214 #endif
215 
216 #ifndef OPENSSL_NO_DH
217 /* Our internal DH_METHOD that we provide pointers to */
218 static DH_METHOD aep_dh =
219  {
220  "Aep DH method",
221  NULL,
222  NULL,
223  aep_mod_exp_dh,
224  NULL,
225  NULL,
226  0,
227  NULL,
228  NULL
229  };
230 #endif
231 
232 #ifdef AEPRAND
233 /* our internal RAND_method that we provide pointers to */
234 static RAND_METHOD aep_random =
235  {
236  /*"AEP RAND method", */
237  NULL,
238  aep_rand,
239  NULL,
240  NULL,
241  aep_rand,
242  aep_rand_status,
243  };
244 #endif
245 
246 /*Define an array of structures to hold connections*/
247 static AEP_CONNECTION_ENTRY aep_app_conn_table[MAX_PROCESS_CONNECTIONS];
248 
249 /*Used to determine if this is a new process*/
250 static pid_t recorded_pid = 0;
251 
252 #ifdef AEPRAND
253 static AEP_U8 rand_block[RAND_BLK_SIZE];
254 static AEP_U32 rand_block_bytes = 0;
255 #endif
256 
257 /* Constants used when creating the ENGINE */
258 static const char *engine_aep_id = "aep";
259 static const char *engine_aep_name = "Aep hardware engine support";
260 
261 static int max_key_len = 2176;
262 
263 
264 /* This internal function is used by ENGINE_aep() and possibly by the
265  * "dynamic" ENGINE support too */
266 static int bind_aep(ENGINE *e)
267  {
268 #ifndef OPENSSL_NO_RSA
269  const RSA_METHOD *meth1;
270 #endif
271 #ifndef OPENSSL_NO_DSA
272  const DSA_METHOD *meth2;
273 #endif
274 #ifndef OPENSSL_NO_DH
275  const DH_METHOD *meth3;
276 #endif
277 
278  if(!ENGINE_set_id(e, engine_aep_id) ||
279  !ENGINE_set_name(e, engine_aep_name) ||
280 #ifndef OPENSSL_NO_RSA
281  !ENGINE_set_RSA(e, &aep_rsa) ||
282 #endif
283 #ifndef OPENSSL_NO_DSA
284  !ENGINE_set_DSA(e, &aep_dsa) ||
285 #endif
286 #ifndef OPENSSL_NO_DH
287  !ENGINE_set_DH(e, &aep_dh) ||
288 #endif
289 #ifdef AEPRAND
290  !ENGINE_set_RAND(e, &aep_random) ||
291 #endif
292  !ENGINE_set_init_function(e, aep_init) ||
293  !ENGINE_set_destroy_function(e, aep_destroy) ||
294  !ENGINE_set_finish_function(e, aep_finish) ||
295  !ENGINE_set_ctrl_function(e, aep_ctrl) ||
296  !ENGINE_set_cmd_defns(e, aep_cmd_defns))
297  return 0;
298 
299 #ifndef OPENSSL_NO_RSA
300  /* We know that the "PKCS1_SSLeay()" functions hook properly
301  * to the aep-specific mod_exp and mod_exp_crt so we use
302  * those functions. NB: We don't use ENGINE_openssl() or
303  * anything "more generic" because something like the RSAref
304  * code may not hook properly, and if you own one of these
305  * cards then you have the right to do RSA operations on it
306  * anyway! */
307  meth1 = RSA_PKCS1_SSLeay();
308  aep_rsa.rsa_pub_enc = meth1->rsa_pub_enc;
309  aep_rsa.rsa_pub_dec = meth1->rsa_pub_dec;
310  aep_rsa.rsa_priv_enc = meth1->rsa_priv_enc;
311  aep_rsa.rsa_priv_dec = meth1->rsa_priv_dec;
312 #endif
313 
314 
315 #ifndef OPENSSL_NO_DSA
316  /* Use the DSA_OpenSSL() method and just hook the mod_exp-ish
317  * bits. */
318  meth2 = DSA_OpenSSL();
319  aep_dsa.dsa_do_sign = meth2->dsa_do_sign;
320  aep_dsa.dsa_sign_setup = meth2->dsa_sign_setup;
321  aep_dsa.dsa_do_verify = meth2->dsa_do_verify;
322 
323  aep_dsa = *DSA_get_default_method();
324  aep_dsa.dsa_mod_exp = aep_dsa_mod_exp;
325  aep_dsa.bn_mod_exp = aep_mod_exp_dsa;
326 #endif
327 
328 #ifndef OPENSSL_NO_DH
329  /* Much the same for Diffie-Hellman */
330  meth3 = DH_OpenSSL();
331  aep_dh.generate_key = meth3->generate_key;
332  aep_dh.compute_key = meth3->compute_key;
333  aep_dh.bn_mod_exp = meth3->bn_mod_exp;
334 #endif
335 
336  /* Ensure the aep error handling is set up */
337  ERR_load_AEPHK_strings();
338 
339  return 1;
340 }
341 
342 #ifndef OPENSSL_NO_DYNAMIC_ENGINE
343 static int bind_helper(ENGINE *e, const char *id)
344  {
345  if(id && (strcmp(id, engine_aep_id) != 0))
346  return 0;
347  if(!bind_aep(e))
348  return 0;
349  return 1;
350  }
351 IMPLEMENT_DYNAMIC_CHECK_FN()
352 IMPLEMENT_DYNAMIC_BIND_FN(bind_helper)
353 #else
354 static ENGINE *engine_aep(void)
355  {
356  ENGINE *ret = ENGINE_new();
357  if(!ret)
358  return NULL;
359  if(!bind_aep(ret))
360  {
361  ENGINE_free(ret);
362  return NULL;
363  }
364  return ret;
365  }
366 
367 void ENGINE_load_aep(void)
368  {
369  /* Copied from eng_[openssl|dyn].c */
370  ENGINE *toadd = engine_aep();
371  if(!toadd) return;
372  ENGINE_add(toadd);
373  ENGINE_free(toadd);
374  ERR_clear_error();
375  }
376 #endif
377 
378 /* This is a process-global DSO handle used for loading and unloading
379  * the Aep library. NB: This is only set (or unset) during an
380  * init() or finish() call (reference counts permitting) and they're
381  * operating with global locks, so this should be thread-safe
382  * implicitly. */
383 static DSO *aep_dso = NULL;
384 
385 /* These are the static string constants for the DSO file name and the function
386  * symbol names to bind to.
387 */
388 static const char *AEP_LIBNAME = NULL;
389 static const char *get_AEP_LIBNAME(void)
390  {
391  if(AEP_LIBNAME)
392  return AEP_LIBNAME;
393  return "aep";
394  }
395 static void free_AEP_LIBNAME(void)
396  {
397  if(AEP_LIBNAME)
398  OPENSSL_free((void*)AEP_LIBNAME);
399  AEP_LIBNAME = NULL;
400  }
401 static long set_AEP_LIBNAME(const char *name)
402  {
403  free_AEP_LIBNAME();
404  return ((AEP_LIBNAME = BUF_strdup(name)) != NULL ? 1 : 0);
405  }
406 
407 static const char *AEP_F1 = "AEP_ModExp";
408 static const char *AEP_F2 = "AEP_ModExpCrt";
409 #ifdef AEPRAND
410 static const char *AEP_F3 = "AEP_GenRandom";
411 #endif
412 static const char *AEP_F4 = "AEP_Finalize";
413 static const char *AEP_F5 = "AEP_Initialize";
414 static const char *AEP_F6 = "AEP_OpenConnection";
415 static const char *AEP_F7 = "AEP_SetBNCallBacks";
416 static const char *AEP_F8 = "AEP_CloseConnection";
417 
418 /* These are the function pointers that are (un)set when the library has
419  * successfully (un)loaded. */
420 static t_AEP_OpenConnection *p_AEP_OpenConnection = NULL;
421 static t_AEP_CloseConnection *p_AEP_CloseConnection = NULL;
422 static t_AEP_ModExp *p_AEP_ModExp = NULL;
423 static t_AEP_ModExpCrt *p_AEP_ModExpCrt = NULL;
424 #ifdef AEPRAND
425 static t_AEP_GenRandom *p_AEP_GenRandom = NULL;
426 #endif
427 static t_AEP_Initialize *p_AEP_Initialize = NULL;
428 static t_AEP_Finalize *p_AEP_Finalize = NULL;
429 static t_AEP_SetBNCallBacks *p_AEP_SetBNCallBacks = NULL;
430 
431 /* (de)initialisation functions. */
432 static int aep_init(ENGINE *e)
433  {
434  t_AEP_ModExp *p1;
435  t_AEP_ModExpCrt *p2;
436 #ifdef AEPRAND
437  t_AEP_GenRandom *p3;
438 #endif
439  t_AEP_Finalize *p4;
440  t_AEP_Initialize *p5;
441  t_AEP_OpenConnection *p6;
442  t_AEP_SetBNCallBacks *p7;
443  t_AEP_CloseConnection *p8;
444 
445  int to_return = 0;
446 
447  if(aep_dso != NULL)
448  {
449  AEPHKerr(AEPHK_F_AEP_INIT,AEPHK_R_ALREADY_LOADED);
450  goto err;
451  }
452  /* Attempt to load libaep.so. */
453 
454  aep_dso = DSO_load(NULL, get_AEP_LIBNAME(), NULL, 0);
455 
456  if(aep_dso == NULL)
457  {
458  AEPHKerr(AEPHK_F_AEP_INIT,AEPHK_R_NOT_LOADED);
459  goto err;
460  }
461 
462  if( !(p1 = (t_AEP_ModExp *) DSO_bind_func( aep_dso,AEP_F1)) ||
463  !(p2 = (t_AEP_ModExpCrt*) DSO_bind_func( aep_dso,AEP_F2)) ||
464 #ifdef AEPRAND
465  !(p3 = (t_AEP_GenRandom*) DSO_bind_func( aep_dso,AEP_F3)) ||
466 #endif
467  !(p4 = (t_AEP_Finalize*) DSO_bind_func( aep_dso,AEP_F4)) ||
468  !(p5 = (t_AEP_Initialize*) DSO_bind_func( aep_dso,AEP_F5)) ||
469  !(p6 = (t_AEP_OpenConnection*) DSO_bind_func( aep_dso,AEP_F6)) ||
470  !(p7 = (t_AEP_SetBNCallBacks*) DSO_bind_func( aep_dso,AEP_F7)) ||
471  !(p8 = (t_AEP_CloseConnection*) DSO_bind_func( aep_dso,AEP_F8)))
472  {
473  AEPHKerr(AEPHK_F_AEP_INIT,AEPHK_R_NOT_LOADED);
474  goto err;
475  }
476 
477  /* Copy the pointers */
478 
479  p_AEP_ModExp = p1;
480  p_AEP_ModExpCrt = p2;
481 #ifdef AEPRAND
482  p_AEP_GenRandom = p3;
483 #endif
484  p_AEP_Finalize = p4;
485  p_AEP_Initialize = p5;
486  p_AEP_OpenConnection = p6;
487  p_AEP_SetBNCallBacks = p7;
488  p_AEP_CloseConnection = p8;
489 
490  to_return = 1;
491 
492  return to_return;
493 
494  err:
495 
496  if(aep_dso)
497  DSO_free(aep_dso);
498  aep_dso = NULL;
499 
500  p_AEP_OpenConnection = NULL;
501  p_AEP_ModExp = NULL;
502  p_AEP_ModExpCrt = NULL;
503 #ifdef AEPRAND
504  p_AEP_GenRandom = NULL;
505 #endif
506  p_AEP_Initialize = NULL;
507  p_AEP_Finalize = NULL;
508  p_AEP_SetBNCallBacks = NULL;
509  p_AEP_CloseConnection = NULL;
510 
511  return to_return;
512  }
513 
514 /* Destructor (complements the "ENGINE_aep()" constructor) */
515 static int aep_destroy(ENGINE *e)
516  {
517  free_AEP_LIBNAME();
518  ERR_unload_AEPHK_strings();
519  return 1;
520  }
521 
522 static int aep_finish(ENGINE *e)
523  {
524  int to_return = 0, in_use;
525  AEP_RV rv;
526 
527  if(aep_dso == NULL)
528  {
529  AEPHKerr(AEPHK_F_AEP_FINISH,AEPHK_R_NOT_LOADED);
530  goto err;
531  }
532 
533  rv = aep_close_all_connections(0, &in_use);
534  if (rv != AEP_R_OK)
535  {
536  AEPHKerr(AEPHK_F_AEP_FINISH,AEPHK_R_CLOSE_HANDLES_FAILED);
537  goto err;
538  }
539  if (in_use)
540  {
541  AEPHKerr(AEPHK_F_AEP_FINISH,AEPHK_R_CONNECTIONS_IN_USE);
542  goto err;
543  }
544 
545  rv = p_AEP_Finalize();
546  if (rv != AEP_R_OK)
547  {
548  AEPHKerr(AEPHK_F_AEP_FINISH,AEPHK_R_FINALIZE_FAILED);
549  goto err;
550  }
551 
552  if(!DSO_free(aep_dso))
553  {
554  AEPHKerr(AEPHK_F_AEP_FINISH,AEPHK_R_UNIT_FAILURE);
555  goto err;
556  }
557 
558  aep_dso = NULL;
559  p_AEP_CloseConnection = NULL;
560  p_AEP_OpenConnection = NULL;
561  p_AEP_ModExp = NULL;
562  p_AEP_ModExpCrt = NULL;
563 #ifdef AEPRAND
564  p_AEP_GenRandom = NULL;
565 #endif
566  p_AEP_Initialize = NULL;
567  p_AEP_Finalize = NULL;
568  p_AEP_SetBNCallBacks = NULL;
569 
570  to_return = 1;
571  err:
572  return to_return;
573  }
574 
575 static int aep_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f)(void))
576  {
577  int initialised = ((aep_dso == NULL) ? 0 : 1);
578  switch(cmd)
579  {
580  case AEP_CMD_SO_PATH:
581  if(p == NULL)
582  {
583  AEPHKerr(AEPHK_F_AEP_CTRL,
584  ERR_R_PASSED_NULL_PARAMETER);
585  return 0;
586  }
587  if(initialised)
588  {
589  AEPHKerr(AEPHK_F_AEP_CTRL,
590  AEPHK_R_ALREADY_LOADED);
591  return 0;
592  }
593  return set_AEP_LIBNAME((const char*)p);
594  default:
595  break;
596  }
597  AEPHKerr(AEPHK_F_AEP_CTRL,AEPHK_R_CTRL_COMMAND_NOT_IMPLEMENTED);
598  return 0;
599  }
600 
601 static int aep_mod_exp(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
602  const BIGNUM *m, BN_CTX *ctx)
603  {
604  int to_return = 0;
605  int r_len = 0;
606  AEP_CONNECTION_HNDL hConnection;
607  AEP_RV rv;
608 
609  r_len = BN_num_bits(m);
610 
611  /* Perform in software if modulus is too large for hardware. */
612 
613  if (r_len > max_key_len){
614  AEPHKerr(AEPHK_F_AEP_MOD_EXP, AEPHK_R_SIZE_TOO_LARGE_OR_TOO_SMALL);
615  return BN_mod_exp(r, a, p, m, ctx);
616  }
617 
618  /*Grab a connection from the pool*/
619  rv = aep_get_connection(&hConnection);
620  if (rv != AEP_R_OK)
621  {
622  AEPHKerr(AEPHK_F_AEP_MOD_EXP,AEPHK_R_GET_HANDLE_FAILED);
623  return BN_mod_exp(r, a, p, m, ctx);
624  }
625 
626  /*To the card with the mod exp*/
627  rv = p_AEP_ModExp(hConnection,(void*)a, (void*)p,(void*)m, (void*)r,NULL);
628 
629  if (rv != AEP_R_OK)
630  {
631  AEPHKerr(AEPHK_F_AEP_MOD_EXP,AEPHK_R_MOD_EXP_FAILED);
632  rv = aep_close_connection(hConnection);
633  return BN_mod_exp(r, a, p, m, ctx);
634  }
635 
636  /*Return the connection to the pool*/
637  rv = aep_return_connection(hConnection);
638  if (rv != AEP_R_OK)
639  {
640  AEPHKerr(AEPHK_F_AEP_MOD_EXP,AEPHK_R_RETURN_CONNECTION_FAILED);
641  goto err;
642  }
643 
644  to_return = 1;
645  err:
646  return to_return;
647  }
648 
649 #ifndef OPENSSL_NO_RSA
650 static AEP_RV aep_mod_exp_crt(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
651  const BIGNUM *q, const BIGNUM *dmp1,
652  const BIGNUM *dmq1,const BIGNUM *iqmp, BN_CTX *ctx)
653  {
654  AEP_RV rv = AEP_R_OK;
655  AEP_CONNECTION_HNDL hConnection;
656 
657  /*Grab a connection from the pool*/
658  rv = aep_get_connection(&hConnection);
659  if (rv != AEP_R_OK)
660  {
661  AEPHKerr(AEPHK_F_AEP_MOD_EXP_CRT,AEPHK_R_GET_HANDLE_FAILED);
662  return FAIL_TO_SW;
663  }
664 
665  /*To the card with the mod exp*/
666  rv = p_AEP_ModExpCrt(hConnection,(void*)a, (void*)p, (void*)q, (void*)dmp1,(void*)dmq1,
667  (void*)iqmp,(void*)r,NULL);
668  if (rv != AEP_R_OK)
669  {
670  AEPHKerr(AEPHK_F_AEP_MOD_EXP_CRT,AEPHK_R_MOD_EXP_CRT_FAILED);
671  rv = aep_close_connection(hConnection);
672  return FAIL_TO_SW;
673  }
674 
675  /*Return the connection to the pool*/
676  rv = aep_return_connection(hConnection);
677  if (rv != AEP_R_OK)
678  {
679  AEPHKerr(AEPHK_F_AEP_MOD_EXP_CRT,AEPHK_R_RETURN_CONNECTION_FAILED);
680  goto err;
681  }
682 
683  err:
684  return rv;
685  }
686 #endif
687 
688 
689 #ifdef AEPRAND
690 static int aep_rand(unsigned char *buf,int len )
691  {
692  AEP_RV rv = AEP_R_OK;
693  AEP_CONNECTION_HNDL hConnection;
694 
695  CRYPTO_w_lock(CRYPTO_LOCK_RAND);
696 
697  /*Can the request be serviced with what's already in the buffer?*/
698  if (len <= rand_block_bytes)
699  {
700  memcpy(buf, &rand_block[RAND_BLK_SIZE - rand_block_bytes], len);
701  rand_block_bytes -= len;
702  CRYPTO_w_unlock(CRYPTO_LOCK_RAND);
703  }
704  else
705  /*If not the get another block of random bytes*/
706  {
707  CRYPTO_w_unlock(CRYPTO_LOCK_RAND);
708 
709  rv = aep_get_connection(&hConnection);
710  if (rv != AEP_R_OK)
711  {
712  AEPHKerr(AEPHK_F_AEP_RAND,AEPHK_R_GET_HANDLE_FAILED);
713  goto err_nounlock;
714  }
715 
716  if (len > RAND_BLK_SIZE)
717  {
718  rv = p_AEP_GenRandom(hConnection, len, 2, buf, NULL);
719  if (rv != AEP_R_OK)
720  {
721  AEPHKerr(AEPHK_F_AEP_RAND,AEPHK_R_GET_RANDOM_FAILED);
722  goto err_nounlock;
723  }
724  }
725  else
726  {
727  CRYPTO_w_lock(CRYPTO_LOCK_RAND);
728 
729  rv = p_AEP_GenRandom(hConnection, RAND_BLK_SIZE, 2, &rand_block[0], NULL);
730  if (rv != AEP_R_OK)
731  {
732  AEPHKerr(AEPHK_F_AEP_RAND,AEPHK_R_GET_RANDOM_FAILED);
733 
734  goto err;
735  }
736 
737  rand_block_bytes = RAND_BLK_SIZE;
738 
739  memcpy(buf, &rand_block[RAND_BLK_SIZE - rand_block_bytes], len);
740  rand_block_bytes -= len;
741 
742  CRYPTO_w_unlock(CRYPTO_LOCK_RAND);
743  }
744 
745  rv = aep_return_connection(hConnection);
746  if (rv != AEP_R_OK)
747  {
748  AEPHKerr(AEPHK_F_AEP_RAND,AEPHK_R_RETURN_CONNECTION_FAILED);
749 
750  goto err_nounlock;
751  }
752  }
753 
754  return 1;
755  err:
756  CRYPTO_w_unlock(CRYPTO_LOCK_RAND);
757  err_nounlock:
758  return 0;
759  }
760 
761 static int aep_rand_status(void)
762 {
763  return 1;
764 }
765 #endif
766 
767 #ifndef OPENSSL_NO_RSA
768 static int aep_rsa_mod_exp(BIGNUM *r0, const BIGNUM *I, RSA *rsa, BN_CTX *ctx)
769  {
770  int to_return = 0;
771  AEP_RV rv = AEP_R_OK;
772 
773  if (!aep_dso)
774  {
775  AEPHKerr(AEPHK_F_AEP_RSA_MOD_EXP,AEPHK_R_NOT_LOADED);
776  goto err;
777  }
778 
779  /*See if we have all the necessary bits for a crt*/
780  if (rsa->q && rsa->dmp1 && rsa->dmq1 && rsa->iqmp)
781  {
782  rv = aep_mod_exp_crt(r0,I,rsa->p,rsa->q, rsa->dmp1,rsa->dmq1,rsa->iqmp,ctx);
783 
784  if (rv == FAIL_TO_SW){
785  const RSA_METHOD *meth = RSA_PKCS1_SSLeay();
786  to_return = (*meth->rsa_mod_exp)(r0, I, rsa, ctx);
787  goto err;
788  }
789  else if (rv != AEP_R_OK)
790  goto err;
791  }
792  else
793  {
794  if (!rsa->d || !rsa->n)
795  {
796  AEPHKerr(AEPHK_F_AEP_RSA_MOD_EXP,AEPHK_R_MISSING_KEY_COMPONENTS);
797  goto err;
798  }
799 
800  rv = aep_mod_exp(r0,I,rsa->d,rsa->n,ctx);
801  if (rv != AEP_R_OK)
802  goto err;
803 
804  }
805 
806  to_return = 1;
807 
808  err:
809  return to_return;
810 }
811 #endif
812 
813 #ifndef OPENSSL_NO_DSA
814 static int aep_dsa_mod_exp(DSA *dsa, BIGNUM *rr, BIGNUM *a1,
815  BIGNUM *p1, BIGNUM *a2, BIGNUM *p2, BIGNUM *m,
816  BN_CTX *ctx, BN_MONT_CTX *in_mont)
817  {
818  BIGNUM t;
819  int to_return = 0;
820  BN_init(&t);
821 
822  /* let rr = a1 ^ p1 mod m */
823  if (!aep_mod_exp(rr,a1,p1,m,ctx)) goto end;
824  /* let t = a2 ^ p2 mod m */
825  if (!aep_mod_exp(&t,a2,p2,m,ctx)) goto end;
826  /* let rr = rr * t mod m */
827  if (!BN_mod_mul(rr,rr,&t,m,ctx)) goto end;
828  to_return = 1;
829  end:
830  BN_free(&t);
831  return to_return;
832  }
833 
834 static int aep_mod_exp_dsa(DSA *dsa, BIGNUM *r, BIGNUM *a,
835  const BIGNUM *p, const BIGNUM *m, BN_CTX *ctx,
836  BN_MONT_CTX *m_ctx)
837  {
838  return aep_mod_exp(r, a, p, m, ctx);
839  }
840 #endif
841 
842 #ifndef OPENSSL_NO_RSA
843 /* This function is aliased to mod_exp (with the mont stuff dropped). */
844 static int aep_mod_exp_mont(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
845  const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx)
846  {
847  return aep_mod_exp(r, a, p, m, ctx);
848  }
849 #endif
850 
851 #ifndef OPENSSL_NO_DH
852 /* This function is aliased to mod_exp (with the dh and mont dropped). */
853 static int aep_mod_exp_dh(const DH *dh, BIGNUM *r, const BIGNUM *a,
854  const BIGNUM *p, const BIGNUM *m, BN_CTX *ctx,
855  BN_MONT_CTX *m_ctx)
856  {
857  return aep_mod_exp(r, a, p, m, ctx);
858  }
859 #endif
860 
861 static AEP_RV aep_get_connection(AEP_CONNECTION_HNDL_PTR phConnection)
862  {
863  int count;
864  AEP_RV rv = AEP_R_OK;
865 
866  /*Get the current process id*/
867  pid_t curr_pid;
868 
869  CRYPTO_w_lock(CRYPTO_LOCK_ENGINE);
870 
871  curr_pid = getpid();
872 
873  /*Check if this is the first time this is being called from the current
874  process*/
875  if (recorded_pid != curr_pid)
876  {
877  /*Remember our pid so we can check if we're in a new process*/
878  recorded_pid = curr_pid;
879 
880  /*Call Finalize to make sure we have not inherited some data
881  from a parent process*/
882  p_AEP_Finalize();
883 
884  /*Initialise the AEP API*/
885  rv = p_AEP_Initialize(NULL);
886 
887  if (rv != AEP_R_OK)
888  {
889  AEPHKerr(AEPHK_F_AEP_GET_CONNECTION,AEPHK_R_INIT_FAILURE);
890  recorded_pid = 0;
891  goto end;
892  }
893 
894  /*Set the AEP big num call back functions*/
895  rv = p_AEP_SetBNCallBacks(&GetBigNumSize, &MakeAEPBigNum,
896  &ConvertAEPBigNum);
897 
898  if (rv != AEP_R_OK)
899  {
900  AEPHKerr(AEPHK_F_AEP_GET_CONNECTION,AEPHK_R_SETBNCALLBACK_FAILURE);
901  recorded_pid = 0;
902  goto end;
903  }
904 
905 #ifdef AEPRAND
906  /*Reset the rand byte count*/
907  rand_block_bytes = 0;
908 #endif
909 
910  /*Init the structures*/
911  for (count = 0;count < MAX_PROCESS_CONNECTIONS;count ++)
912  {
913  aep_app_conn_table[count].conn_state = NotConnected;
914  aep_app_conn_table[count].conn_hndl = 0;
915  }
916 
917  /*Open a connection*/
918  rv = p_AEP_OpenConnection(phConnection);
919 
920  if (rv != AEP_R_OK)
921  {
922  AEPHKerr(AEPHK_F_AEP_GET_CONNECTION,AEPHK_R_UNIT_FAILURE);
923  recorded_pid = 0;
924  goto end;
925  }
926 
927  aep_app_conn_table[0].conn_state = InUse;
928  aep_app_conn_table[0].conn_hndl = *phConnection;
929  goto end;
930  }
931  /*Check the existing connections to see if we can find a free one*/
932  for (count = 0;count < MAX_PROCESS_CONNECTIONS;count ++)
933  {
934  if (aep_app_conn_table[count].conn_state == Connected)
935  {
936  aep_app_conn_table[count].conn_state = InUse;
937  *phConnection = aep_app_conn_table[count].conn_hndl;
938  goto end;
939  }
940  }
941  /*If no connections available, we're going to have to try
942  to open a new one*/
943  for (count = 0;count < MAX_PROCESS_CONNECTIONS;count ++)
944  {
945  if (aep_app_conn_table[count].conn_state == NotConnected)
946  {
947  /*Open a connection*/
948  rv = p_AEP_OpenConnection(phConnection);
949 
950  if (rv != AEP_R_OK)
951  {
952  AEPHKerr(AEPHK_F_AEP_GET_CONNECTION,AEPHK_R_UNIT_FAILURE);
953  goto end;
954  }
955 
956  aep_app_conn_table[count].conn_state = InUse;
957  aep_app_conn_table[count].conn_hndl = *phConnection;
958  goto end;
959  }
960  }
961  rv = AEP_R_GENERAL_ERROR;
962  end:
963  CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE);
964  return rv;
965  }
966 
967 
968 static AEP_RV aep_return_connection(AEP_CONNECTION_HNDL hConnection)
969  {
970  int count;
971 
972  CRYPTO_w_lock(CRYPTO_LOCK_ENGINE);
973 
974  /*Find the connection item that matches this connection handle*/
975  for(count = 0;count < MAX_PROCESS_CONNECTIONS;count ++)
976  {
977  if (aep_app_conn_table[count].conn_hndl == hConnection)
978  {
979  aep_app_conn_table[count].conn_state = Connected;
980  break;
981  }
982  }
983 
984  CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE);
985 
986  return AEP_R_OK;
987  }
988 
989 static AEP_RV aep_close_connection(AEP_CONNECTION_HNDL hConnection)
990  {
991  int count;
992  AEP_RV rv = AEP_R_OK;
993 
994  CRYPTO_w_lock(CRYPTO_LOCK_ENGINE);
995 
996  /*Find the connection item that matches this connection handle*/
997  for(count = 0;count < MAX_PROCESS_CONNECTIONS;count ++)
998  {
999  if (aep_app_conn_table[count].conn_hndl == hConnection)
1000  {
1001  rv = p_AEP_CloseConnection(aep_app_conn_table[count].conn_hndl);
1002  if (rv != AEP_R_OK)
1003  goto end;
1004  aep_app_conn_table[count].conn_state = NotConnected;
1005  aep_app_conn_table[count].conn_hndl = 0;
1006  break;
1007  }
1008  }
1009 
1010  end:
1011  CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE);
1012  return rv;
1013  }
1014 
1015 static AEP_RV aep_close_all_connections(int use_engine_lock, int *in_use)
1016  {
1017  int count;
1018  AEP_RV rv = AEP_R_OK;
1019 
1020  *in_use = 0;
1021  if (use_engine_lock) CRYPTO_w_lock(CRYPTO_LOCK_ENGINE);
1022  for (count = 0;count < MAX_PROCESS_CONNECTIONS;count ++)
1023  {
1024  switch (aep_app_conn_table[count].conn_state)
1025  {
1026  case Connected:
1027  rv = p_AEP_CloseConnection(aep_app_conn_table[count].conn_hndl);
1028  if (rv != AEP_R_OK)
1029  goto end;
1030  aep_app_conn_table[count].conn_state = NotConnected;
1031  aep_app_conn_table[count].conn_hndl = 0;
1032  break;
1033  case InUse:
1034  (*in_use)++;
1035  break;
1036  case NotConnected:
1037  break;
1038  }
1039  }
1040  end:
1041  if (use_engine_lock) CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE);
1042  return rv;
1043  }
1044 
1045 /*BigNum call back functions, used to convert OpenSSL bignums into AEP bignums.
1046  Note only 32bit Openssl build support*/
1047 
1048 static AEP_RV GetBigNumSize(AEP_VOID_PTR ArbBigNum, AEP_U32* BigNumSize)
1049  {
1050  BIGNUM* bn;
1051 
1052  /*Cast the ArbBigNum pointer to our BIGNUM struct*/
1053  bn = (BIGNUM*) ArbBigNum;
1054 
1055 #ifdef SIXTY_FOUR_BIT_LONG
1056  *BigNumSize = bn->top << 3;
1057 #else
1058  /*Size of the bignum in bytes is equal to the bn->top (no of 32 bit
1059  words) multiplies by 4*/
1060  *BigNumSize = bn->top << 2;
1061 #endif
1062 
1063  return AEP_R_OK;
1064  }
1065 
1066 static AEP_RV MakeAEPBigNum(AEP_VOID_PTR ArbBigNum, AEP_U32 BigNumSize,
1067  unsigned char* AEP_BigNum)
1068  {
1069  BIGNUM* bn;
1070 
1071 #ifndef SIXTY_FOUR_BIT_LONG
1072  unsigned char* buf;
1073  int i;
1074 #endif
1075 
1076  /*Cast the ArbBigNum pointer to our BIGNUM struct*/
1077  bn = (BIGNUM*) ArbBigNum;
1078 
1079 #ifdef SIXTY_FOUR_BIT_LONG
1080  memcpy(AEP_BigNum, bn->d, BigNumSize);
1081 #else
1082  /*Must copy data into a (monotone) least significant byte first format
1083  performing endian conversion if necessary*/
1084  for(i=0;i<bn->top;i++)
1085  {
1086  buf = (unsigned char*)&bn->d[i];
1087 
1088  *((AEP_U32*)AEP_BigNum) = (AEP_U32)
1089  ((unsigned) buf[1] << 8 | buf[0]) |
1090  ((unsigned) buf[3] << 8 | buf[2]) << 16;
1091 
1092  AEP_BigNum += 4;
1093  }
1094 #endif
1095 
1096  return AEP_R_OK;
1097  }
1098 
1099 /*Turn an AEP Big Num back to a user big num*/
1100 static AEP_RV ConvertAEPBigNum(void* ArbBigNum, AEP_U32 BigNumSize,
1101  unsigned char* AEP_BigNum)
1102  {
1103  BIGNUM* bn;
1104 #ifndef SIXTY_FOUR_BIT_LONG
1105  int i;
1106 #endif
1107 
1108  bn = (BIGNUM*)ArbBigNum;
1109 
1110  /*Expand the result bn so that it can hold our big num.
1111  Size is in bits*/
1112  bn_expand(bn, (int)(BigNumSize << 3));
1113 
1114 #ifdef SIXTY_FOUR_BIT_LONG
1115  bn->top = BigNumSize >> 3;
1116 
1117  if((BigNumSize & 7) != 0)
1118  bn->top++;
1119 
1120  memset(bn->d, 0, bn->top << 3);
1121 
1122  memcpy(bn->d, AEP_BigNum, BigNumSize);
1123 #else
1124  bn->top = BigNumSize >> 2;
1125 
1126  for(i=0;i<bn->top;i++)
1127  {
1128  bn->d[i] = (AEP_U32)
1129  ((unsigned) AEP_BigNum[3] << 8 | AEP_BigNum[2]) << 16 |
1130  ((unsigned) AEP_BigNum[1] << 8 | AEP_BigNum[0]);
1131  AEP_BigNum += 4;
1132  }
1133 #endif
1134 
1135  return AEP_R_OK;
1136 }
1137 
1138 #endif /* !OPENSSL_NO_HW_AEP */
1139 #endif /* !OPENSSL_NO_HW */
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