forked from openssl/openssl
-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathe_chil.c
1331 lines (1203 loc) · 41.3 KB
/
e_chil.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
/*
* Written by Richard Levitte ([email protected]), Geoff Thorpe
* ([email protected]) and Dr Stephen N Henson ([email protected]) for
* the OpenSSL project 2000.
*/
/* ====================================================================
* Copyright (c) 1999-2001 The OpenSSL Project. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. All advertising materials mentioning features or use of this
* software must display the following acknowledgment:
* "This product includes software developed by the OpenSSL Project
* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
*
* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
* endorse or promote products derived from this software without
* prior written permission. For written permission, please contact
*
* 5. Products derived from this software may not be called "OpenSSL"
* nor may "OpenSSL" appear in their names without prior written
* permission of the OpenSSL Project.
*
* 6. Redistributions of any form whatsoever must retain the following
* acknowledgment:
* "This product includes software developed by the OpenSSL Project
* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
*
* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
* ====================================================================
*
* This product includes cryptographic software written by Eric Young
* ([email protected]). This product includes software written by Tim
* Hudson ([email protected]).
*
*/
#include <stdio.h>
#include <string.h>
#include <openssl/crypto.h>
#include <openssl/pem.h>
#include "internal/dso.h"
#include <openssl/engine.h>
#include <openssl/ui.h>
#include <openssl/rand.h>
#ifndef OPENSSL_NO_RSA
# include <openssl/rsa.h>
#endif
#ifndef OPENSSL_NO_DH
# include <openssl/dh.h>
#endif
#include <openssl/bn.h>
#ifndef OPENSSL_NO_HW
# ifndef OPENSSL_NO_HW_CHIL
/*-
* Attribution notice: nCipher have said several times that it's OK for
* us to implement a general interface to their boxes, and recently declared
* their HWCryptoHook to be public, and therefore available for us to use.
* Thanks, nCipher.
*
* The hwcryptohook.h included here is from May 2000.
* [Richard Levitte]
*/
# ifdef FLAT_INC
# include "hwcryptohook.h"
# else
# include "vendor_defns/hwcryptohook.h"
# endif
# define HWCRHK_LIB_NAME "CHIL engine"
# include "e_chil_err.c"
static CRYPTO_RWLOCK *chil_lock;
static int hwcrhk_destroy(ENGINE *e);
static int hwcrhk_init(ENGINE *e);
static int hwcrhk_finish(ENGINE *e);
static int hwcrhk_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f) (void));
/* Functions to handle mutexes */
static int hwcrhk_mutex_init(HWCryptoHook_Mutex *,
HWCryptoHook_CallerContext *);
static int hwcrhk_mutex_lock(HWCryptoHook_Mutex *);
static void hwcrhk_mutex_unlock(HWCryptoHook_Mutex *);
static void hwcrhk_mutex_destroy(HWCryptoHook_Mutex *);
/* BIGNUM stuff */
static int hwcrhk_mod_exp(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
const BIGNUM *m, BN_CTX *ctx);
# ifndef OPENSSL_NO_RSA
/* RSA stuff */
static int hwcrhk_rsa_mod_exp(BIGNUM *r, const BIGNUM *I, RSA *rsa,
BN_CTX *ctx);
/* This function is aliased to mod_exp (with the mont stuff dropped). */
static int hwcrhk_mod_exp_mont(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
const BIGNUM *m, BN_CTX *ctx,
BN_MONT_CTX *m_ctx);
static int hwcrhk_rsa_finish(RSA *rsa);
# endif
# ifndef OPENSSL_NO_DH
/* DH stuff */
/* This function is alised to mod_exp (with the DH and mont dropped). */
static int hwcrhk_mod_exp_dh(const DH *dh, BIGNUM *r,
const BIGNUM *a, const BIGNUM *p,
const BIGNUM *m, BN_CTX *ctx,
BN_MONT_CTX *m_ctx);
# endif
/* RAND stuff */
static int hwcrhk_rand_bytes(unsigned char *buf, int num);
static int hwcrhk_rand_status(void);
/* KM stuff */
static EVP_PKEY *hwcrhk_load_privkey(ENGINE *eng, const char *key_id,
UI_METHOD *ui_method,
void *callback_data);
static EVP_PKEY *hwcrhk_load_pubkey(ENGINE *eng, const char *key_id,
UI_METHOD *ui_method,
void *callback_data);
/* Interaction stuff */
static int hwcrhk_insert_card(const char *prompt_info,
const char *wrong_info,
HWCryptoHook_PassphraseContext * ppctx,
HWCryptoHook_CallerContext * cactx);
static int hwcrhk_get_pass(const char *prompt_info,
int *len_io, char *buf,
HWCryptoHook_PassphraseContext * ppctx,
HWCryptoHook_CallerContext * cactx);
static void hwcrhk_log_message(void *logstr, const char *message);
/* The definitions for control commands specific to this engine */
# define HWCRHK_CMD_SO_PATH ENGINE_CMD_BASE
# define HWCRHK_CMD_FORK_CHECK (ENGINE_CMD_BASE + 1)
# define HWCRHK_CMD_THREAD_LOCKING (ENGINE_CMD_BASE + 2)
# define HWCRHK_CMD_SET_USER_INTERFACE (ENGINE_CMD_BASE + 3)
# define HWCRHK_CMD_SET_CALLBACK_DATA (ENGINE_CMD_BASE + 4)
static const ENGINE_CMD_DEFN hwcrhk_cmd_defns[] = {
{HWCRHK_CMD_SO_PATH,
"SO_PATH",
"Specifies the path to the 'hwcrhk' shared library",
ENGINE_CMD_FLAG_STRING},
{HWCRHK_CMD_FORK_CHECK,
"FORK_CHECK",
"Turns fork() checking on (non-zero) or off (zero)",
ENGINE_CMD_FLAG_NUMERIC},
{HWCRHK_CMD_THREAD_LOCKING,
"THREAD_LOCKING",
"Turns thread-safe locking on (zero) or off (non-zero)",
ENGINE_CMD_FLAG_NUMERIC},
{HWCRHK_CMD_SET_USER_INTERFACE,
"SET_USER_INTERFACE",
"Set the global user interface (internal)",
ENGINE_CMD_FLAG_INTERNAL},
{HWCRHK_CMD_SET_CALLBACK_DATA,
"SET_CALLBACK_DATA",
"Set the global user interface extra data (internal)",
ENGINE_CMD_FLAG_INTERNAL},
{0, NULL, NULL, 0}
};
# ifndef OPENSSL_NO_RSA
/* Our internal RSA_METHOD that we provide pointers to */
static RSA_METHOD hwcrhk_rsa = {
"CHIL RSA method",
NULL,
NULL,
NULL,
NULL,
hwcrhk_rsa_mod_exp,
hwcrhk_mod_exp_mont,
NULL,
hwcrhk_rsa_finish,
0,
NULL,
NULL,
NULL,
NULL
};
# endif
# ifndef OPENSSL_NO_DH
/* Our internal DH_METHOD that we provide pointers to */
static DH_METHOD hwcrhk_dh = {
"CHIL DH method",
NULL,
NULL,
hwcrhk_mod_exp_dh,
NULL,
NULL,
0,
NULL,
NULL
};
# endif
static RAND_METHOD hwcrhk_rand = {
/* "CHIL RAND method", */
NULL,
hwcrhk_rand_bytes,
NULL,
NULL,
hwcrhk_rand_bytes,
hwcrhk_rand_status,
};
/* Constants used when creating the ENGINE */
static const char *engine_hwcrhk_id = "chil";
static const char *engine_hwcrhk_name = "CHIL hardware engine support";
# ifndef OPENSSL_NO_DYNAMIC_ENGINE
/* Compatibility hack, the dynamic library uses this form in the path */
static const char *engine_hwcrhk_id_alt = "ncipher";
# endif
/* Internal stuff for HWCryptoHook */
/* Some structures needed for proper use of thread locks */
/*
* hwcryptohook.h has some typedefs that turn struct HWCryptoHook_MutexValue
* into HWCryptoHook_Mutex
*/
struct HWCryptoHook_MutexValue {
CRYPTO_RWLOCK *lock;
};
/*
* hwcryptohook.h has some typedefs that turn struct
* HWCryptoHook_PassphraseContextValue into HWCryptoHook_PassphraseContext
*/
struct HWCryptoHook_PassphraseContextValue {
UI_METHOD *ui_method;
void *callback_data;
};
/*
* hwcryptohook.h has some typedefs that turn struct
* HWCryptoHook_CallerContextValue into HWCryptoHook_CallerContext
*/
struct HWCryptoHook_CallerContextValue {
pem_password_cb *password_callback; /* Deprecated! Only present for
* backward compatibility! */
UI_METHOD *ui_method;
void *callback_data;
};
/*
* The MPI structure in HWCryptoHook is pretty compatible with OpenSSL
* BIGNUM's, so lets define a couple of conversion macros
*/
# define BN2MPI(mp, bn) \
{mp.size = bn->top * sizeof(BN_ULONG); mp.buf = (unsigned char *)bn->d;}
# define MPI2BN(bn, mp) \
{mp.size = bn->dmax * sizeof(BN_ULONG); mp.buf = (unsigned char *)bn->d;}
static BIO *logstream = NULL;
static int disable_mutex_callbacks = 0;
/*
* One might wonder why these are needed, since one can pass down at least a
* UI_METHOD and a pointer to callback data to the key-loading functions. The
* thing is that the ModExp and RSAImmed functions can load keys as well, if
* the data they get is in a special, nCipher-defined format (hint: if you
* look at the private exponent of the RSA data as a string, you'll see this
* string: "nCipher KM tool key id", followed by some bytes, followed a key
* identity string, followed by more bytes. This happens when you use
* "embed" keys instead of "hwcrhk" keys). Unfortunately, those functions do
* not take any passphrase or caller context, and our functions can't really
* take any callback data either. Still, the "insert_card" and
* "get_passphrase" callbacks may be called down the line, and will need to
* know what user interface callbacks to call, and having callback data from
* the application may be a nice thing as well, so we need to keep track of
* that globally.
*/
static HWCryptoHook_CallerContext password_context = { NULL, NULL, NULL };
/* Stuff to pass to the HWCryptoHook library */
static HWCryptoHook_InitInfo hwcrhk_globals = {
HWCryptoHook_InitFlags_SimpleForkCheck, /* Flags */
&logstream, /* logstream */
sizeof(BN_ULONG), /* limbsize */
0, /* mslimb first: false for BNs */
-1, /* msbyte first: use native */
0, /* Max mutexes, 0 = no small limit */
0, /* Max simultaneous, 0 = default */
/*
* The next few are mutex stuff: we write wrapper functions around the OS
* mutex functions. We initialise them to 0 here, and change that to
* actual function pointers in hwcrhk_init() if dynamic locks are
* supported (that is, if the application programmer has made sure of
* setting up callbacks bafore starting this engine) *and* if
* disable_mutex_callbacks hasn't been set by a call to
* ENGINE_ctrl(ENGINE_CTRL_CHIL_NO_LOCKING).
*/
sizeof(HWCryptoHook_Mutex),
0,
0,
0,
0,
/*
* The next few are condvar stuff: we write wrapper functions round the
* OS functions. Currently not implemented and not and absolute
* necessity even in threaded programs, therefore 0'ed. Will hopefully
* be implemented some day, since it enhances the efficiency of
* HWCryptoHook.
*/
0, /* sizeof(HWCryptoHook_CondVar), */
0, /* hwcrhk_cv_init, */
0, /* hwcrhk_cv_wait, */
0, /* hwcrhk_cv_signal, */
0, /* hwcrhk_cv_broadcast, */
0, /* hwcrhk_cv_destroy, */
hwcrhk_get_pass, /* pass phrase */
hwcrhk_insert_card, /* insert a card */
hwcrhk_log_message /* Log message */
};
/* Now, to our own code */
/*
* This internal function is used by ENGINE_chil() and possibly by the
* "dynamic" ENGINE support too
*/
static int bind_helper(ENGINE *e)
{
# ifndef OPENSSL_NO_RSA
const RSA_METHOD *meth1;
# endif
# ifndef OPENSSL_NO_DH
const DH_METHOD *meth2;
# endif
chil_lock = CRYPTO_THREAD_lock_new();
if (chil_lock == NULL)
return 0;
if (!ENGINE_set_id(e, engine_hwcrhk_id) ||
!ENGINE_set_name(e, engine_hwcrhk_name) ||
# ifndef OPENSSL_NO_RSA
!ENGINE_set_RSA(e, &hwcrhk_rsa) ||
# endif
# ifndef OPENSSL_NO_DH
!ENGINE_set_DH(e, &hwcrhk_dh) ||
# endif
!ENGINE_set_RAND(e, &hwcrhk_rand) ||
!ENGINE_set_destroy_function(e, hwcrhk_destroy) ||
!ENGINE_set_init_function(e, hwcrhk_init) ||
!ENGINE_set_finish_function(e, hwcrhk_finish) ||
!ENGINE_set_ctrl_function(e, hwcrhk_ctrl) ||
!ENGINE_set_load_privkey_function(e, hwcrhk_load_privkey) ||
!ENGINE_set_load_pubkey_function(e, hwcrhk_load_pubkey) ||
!ENGINE_set_cmd_defns(e, hwcrhk_cmd_defns))
return 0;
# ifndef OPENSSL_NO_RSA
/*
* We know that the "PKCS1_OpenSSL()" functions hook properly to the
* cswift-specific mod_exp and mod_exp_crt so we use those functions. NB:
* We don't use ENGINE_openssl() or anything "more generic" because
* something like the RSAref code may not hook properly, and if you own
* one of these cards then you have the right to do RSA operations on it
* anyway!
*/
meth1 = RSA_PKCS1_OpenSSL();
hwcrhk_rsa.rsa_pub_enc = meth1->rsa_pub_enc;
hwcrhk_rsa.rsa_pub_dec = meth1->rsa_pub_dec;
hwcrhk_rsa.rsa_priv_enc = meth1->rsa_priv_enc;
hwcrhk_rsa.rsa_priv_dec = meth1->rsa_priv_dec;
# endif
# ifndef OPENSSL_NO_DH
/* Much the same for Diffie-Hellman */
meth2 = DH_OpenSSL();
hwcrhk_dh.generate_key = meth2->generate_key;
hwcrhk_dh.compute_key = meth2->compute_key;
# endif
/* Ensure the hwcrhk error handling is set up */
ERR_load_HWCRHK_strings();
return 1;
}
# ifdef OPENSSL_NO_DYNAMIC_ENGINE
static ENGINE *engine_chil(void)
{
ENGINE *ret = ENGINE_new();
if (ret == NULL)
return NULL;
if (!bind_helper(ret)) {
ENGINE_free(ret);
return NULL;
}
return ret;
}
void ENGINE_load_chil(void)
{
/* Copied from eng_[openssl|dyn].c */
ENGINE *toadd = engine_chil();
if (!toadd)
return;
ENGINE_add(toadd);
ENGINE_free(toadd);
ERR_clear_error();
}
# endif
/*
* This is a process-global DSO handle used for loading and unloading the
* HWCryptoHook library. NB: This is only set (or unset) during an init() or
* finish() call (reference counts permitting) and they're operating with
* global locks, so this should be thread-safe implicitly.
*/
static DSO *hwcrhk_dso = NULL;
static HWCryptoHook_ContextHandle hwcrhk_context = 0;
# ifndef OPENSSL_NO_RSA
/* Index for KM handle. Not really used yet. */
static int hndidx_rsa = -1;
# endif
/*
* These are the function pointers that are (un)set when the library has
* successfully (un)loaded.
*/
static HWCryptoHook_Init_t *p_hwcrhk_Init = NULL;
static HWCryptoHook_Finish_t *p_hwcrhk_Finish = NULL;
static HWCryptoHook_ModExp_t *p_hwcrhk_ModExp = NULL;
# ifndef OPENSSL_NO_RSA
static HWCryptoHook_RSA_t *p_hwcrhk_RSA = NULL;
# endif
static HWCryptoHook_RandomBytes_t *p_hwcrhk_RandomBytes = NULL;
# ifndef OPENSSL_NO_RSA
static HWCryptoHook_RSALoadKey_t *p_hwcrhk_RSALoadKey = NULL;
static HWCryptoHook_RSAGetPublicKey_t *p_hwcrhk_RSAGetPublicKey = NULL;
static HWCryptoHook_RSAUnloadKey_t *p_hwcrhk_RSAUnloadKey = NULL;
# endif
static HWCryptoHook_ModExpCRT_t *p_hwcrhk_ModExpCRT = NULL;
/* Used in the DSO operations. */
static const char *HWCRHK_LIBNAME = NULL;
static void free_HWCRHK_LIBNAME(void)
{
OPENSSL_free(HWCRHK_LIBNAME);
HWCRHK_LIBNAME = NULL;
}
static const char *get_HWCRHK_LIBNAME(void)
{
if (HWCRHK_LIBNAME)
return HWCRHK_LIBNAME;
return "nfhwcrhk";
}
static long set_HWCRHK_LIBNAME(const char *name)
{
free_HWCRHK_LIBNAME();
return (((HWCRHK_LIBNAME = OPENSSL_strdup(name)) != NULL) ? 1 : 0);
}
static const char *n_hwcrhk_Init = "HWCryptoHook_Init";
static const char *n_hwcrhk_Finish = "HWCryptoHook_Finish";
static const char *n_hwcrhk_ModExp = "HWCryptoHook_ModExp";
# ifndef OPENSSL_NO_RSA
static const char *n_hwcrhk_RSA = "HWCryptoHook_RSA";
# endif
static const char *n_hwcrhk_RandomBytes = "HWCryptoHook_RandomBytes";
# ifndef OPENSSL_NO_RSA
static const char *n_hwcrhk_RSALoadKey = "HWCryptoHook_RSALoadKey";
static const char *n_hwcrhk_RSAGetPublicKey = "HWCryptoHook_RSAGetPublicKey";
static const char *n_hwcrhk_RSAUnloadKey = "HWCryptoHook_RSAUnloadKey";
# endif
static const char *n_hwcrhk_ModExpCRT = "HWCryptoHook_ModExpCRT";
/*
* HWCryptoHook library functions and mechanics - these are used by the
* higher-level functions further down. NB: As and where there's no error
* checking, take a look lower down where these functions are called, the
* checking and error handling is probably down there.
*/
/* utility function to obtain a context */
static int get_context(HWCryptoHook_ContextHandle * hac,
HWCryptoHook_CallerContext * cac)
{
char tempbuf[1024];
HWCryptoHook_ErrMsgBuf rmsg;
rmsg.buf = tempbuf;
rmsg.size = sizeof(tempbuf);
*hac = p_hwcrhk_Init(&hwcrhk_globals, sizeof(hwcrhk_globals), &rmsg, cac);
if (!*hac)
return 0;
return 1;
}
/* similarly to release one. */
static void release_context(HWCryptoHook_ContextHandle hac)
{
p_hwcrhk_Finish(hac);
}
/* Destructor (complements the "ENGINE_chil()" constructor) */
static int hwcrhk_destroy(ENGINE *e)
{
free_HWCRHK_LIBNAME();
ERR_unload_HWCRHK_strings();
CRYPTO_THREAD_lock_free(chil_lock);
return 1;
}
/* (de)initialisation functions. */
static int hwcrhk_init(ENGINE *e)
{
HWCryptoHook_Init_t *p1;
HWCryptoHook_Finish_t *p2;
HWCryptoHook_ModExp_t *p3;
# ifndef OPENSSL_NO_RSA
HWCryptoHook_RSA_t *p4;
HWCryptoHook_RSALoadKey_t *p5;
HWCryptoHook_RSAGetPublicKey_t *p6;
HWCryptoHook_RSAUnloadKey_t *p7;
# endif
HWCryptoHook_RandomBytes_t *p8;
HWCryptoHook_ModExpCRT_t *p9;
if (hwcrhk_dso != NULL) {
HWCRHKerr(HWCRHK_F_HWCRHK_INIT, HWCRHK_R_ALREADY_LOADED);
goto err;
}
/* Attempt to load libnfhwcrhk.so/nfhwcrhk.dll/whatever. */
hwcrhk_dso = DSO_load(NULL, get_HWCRHK_LIBNAME(), NULL, 0);
if (hwcrhk_dso == NULL) {
HWCRHKerr(HWCRHK_F_HWCRHK_INIT, HWCRHK_R_DSO_FAILURE);
goto err;
}
#define BINDIT(t, name) (t *)DSO_bind_func(hwcrhk_dso, name)
if ((p1 = BINDIT(HWCryptoHook_Init_t, n_hwcrhk_Init)) == NULL
|| (p2 = BINDIT(HWCryptoHook_Finish_t, n_hwcrhk_Finish)) == NULL
|| (p3 = BINDIT(HWCryptoHook_ModExp_t, n_hwcrhk_ModExp)) == NULL
# ifndef OPENSSL_NO_RSA
|| (p4 = BINDIT(HWCryptoHook_RSA_t, n_hwcrhk_RSA)) == NULL
|| (p5 = BINDIT(HWCryptoHook_RSALoadKey_t, n_hwcrhk_RSALoadKey)) == NULL
|| (p6 = BINDIT(HWCryptoHook_RSAGetPublicKey_t, n_hwcrhk_RSAGetPublicKey)) == NULL
|| (p7 = BINDIT(HWCryptoHook_RSAUnloadKey_t, n_hwcrhk_RSAUnloadKey)) == NULL
# endif
|| (p8 = BINDIT(HWCryptoHook_RandomBytes_t, n_hwcrhk_RandomBytes)) == NULL
|| (p9 = BINDIT(HWCryptoHook_ModExpCRT_t, n_hwcrhk_ModExpCRT)) == NULL) {
HWCRHKerr(HWCRHK_F_HWCRHK_INIT, HWCRHK_R_DSO_FAILURE);
goto err;
}
/* Copy the pointers */
p_hwcrhk_Init = p1;
p_hwcrhk_Finish = p2;
p_hwcrhk_ModExp = p3;
# ifndef OPENSSL_NO_RSA
p_hwcrhk_RSA = p4;
p_hwcrhk_RSALoadKey = p5;
p_hwcrhk_RSAGetPublicKey = p6;
p_hwcrhk_RSAUnloadKey = p7;
# endif
p_hwcrhk_RandomBytes = p8;
p_hwcrhk_ModExpCRT = p9;
/*
* Check if the application decided to support dynamic locks, and if it
* does, use them.
*/
if (disable_mutex_callbacks == 0) {
hwcrhk_globals.mutex_init = hwcrhk_mutex_init;
hwcrhk_globals.mutex_acquire = hwcrhk_mutex_lock;
hwcrhk_globals.mutex_release = hwcrhk_mutex_unlock;
hwcrhk_globals.mutex_destroy = hwcrhk_mutex_destroy;
}
/*
* Try and get a context - if not, we may have a DSO but no accelerator!
*/
if (!get_context(&hwcrhk_context, &password_context)) {
HWCRHKerr(HWCRHK_F_HWCRHK_INIT, HWCRHK_R_UNIT_FAILURE);
goto err;
}
/* Everything's fine. */
# ifndef OPENSSL_NO_RSA
if (hndidx_rsa == -1)
hndidx_rsa = RSA_get_ex_new_index(0,
"nFast HWCryptoHook RSA key handle",
NULL, NULL, NULL);
# endif
return 1;
err:
DSO_free(hwcrhk_dso);
hwcrhk_dso = NULL;
p_hwcrhk_Init = NULL;
p_hwcrhk_Finish = NULL;
p_hwcrhk_ModExp = NULL;
# ifndef OPENSSL_NO_RSA
p_hwcrhk_RSA = NULL;
p_hwcrhk_RSALoadKey = NULL;
p_hwcrhk_RSAGetPublicKey = NULL;
p_hwcrhk_RSAUnloadKey = NULL;
# endif
p_hwcrhk_ModExpCRT = NULL;
p_hwcrhk_RandomBytes = NULL;
return 0;
}
static int hwcrhk_finish(ENGINE *e)
{
int to_return = 1;
free_HWCRHK_LIBNAME();
if (hwcrhk_dso == NULL) {
HWCRHKerr(HWCRHK_F_HWCRHK_FINISH, HWCRHK_R_NOT_LOADED);
to_return = 0;
goto err;
}
release_context(hwcrhk_context);
if (!DSO_free(hwcrhk_dso)) {
HWCRHKerr(HWCRHK_F_HWCRHK_FINISH, HWCRHK_R_DSO_FAILURE);
to_return = 0;
goto err;
}
err:
BIO_free(logstream);
hwcrhk_dso = NULL;
p_hwcrhk_Init = NULL;
p_hwcrhk_Finish = NULL;
p_hwcrhk_ModExp = NULL;
# ifndef OPENSSL_NO_RSA
p_hwcrhk_RSA = NULL;
p_hwcrhk_RSALoadKey = NULL;
p_hwcrhk_RSAGetPublicKey = NULL;
p_hwcrhk_RSAUnloadKey = NULL;
# endif
p_hwcrhk_ModExpCRT = NULL;
p_hwcrhk_RandomBytes = NULL;
return to_return;
}
static int hwcrhk_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f) (void))
{
int to_return = 1;
switch (cmd) {
case HWCRHK_CMD_SO_PATH:
if (hwcrhk_dso) {
HWCRHKerr(HWCRHK_F_HWCRHK_CTRL, HWCRHK_R_ALREADY_LOADED);
return 0;
}
if (p == NULL) {
HWCRHKerr(HWCRHK_F_HWCRHK_CTRL, ERR_R_PASSED_NULL_PARAMETER);
return 0;
}
return set_HWCRHK_LIBNAME((const char *)p);
case ENGINE_CTRL_SET_LOGSTREAM:
{
BIO *bio = (BIO *)p;
CRYPTO_THREAD_write_lock(chil_lock);
BIO_free(logstream);
logstream = NULL;
if (BIO_up_ref(bio)
logstream = bio;
else
HWCRHKerr(HWCRHK_F_HWCRHK_CTRL, HWCRHK_R_BIO_WAS_FREED);
}
CRYPTO_THREAD_unlock(chil_lock);
break;
case ENGINE_CTRL_SET_PASSWORD_CALLBACK:
CRYPTO_THREAD_write_lock(chil_lock);
password_context.password_callback = (pem_password_cb *)f;
CRYPTO_THREAD_unlock(chil_lock);
break;
case ENGINE_CTRL_SET_USER_INTERFACE:
case HWCRHK_CMD_SET_USER_INTERFACE:
CRYPTO_THREAD_write_lock(chil_lock);
password_context.ui_method = (UI_METHOD *)p;
CRYPTO_THREAD_unlock(chil_lock);
break;
case ENGINE_CTRL_SET_CALLBACK_DATA:
case HWCRHK_CMD_SET_CALLBACK_DATA:
CRYPTO_THREAD_write_lock(chil_lock);
password_context.callback_data = p;
CRYPTO_THREAD_unlock(chil_lock);
break;
/*
* this enables or disables the "SimpleForkCheck" flag used in the
* initialisation structure.
*/
case ENGINE_CTRL_CHIL_SET_FORKCHECK:
case HWCRHK_CMD_FORK_CHECK:
CRYPTO_THREAD_write_lock(chil_lock);
if (i)
hwcrhk_globals.flags |= HWCryptoHook_InitFlags_SimpleForkCheck;
else
hwcrhk_globals.flags &= ~HWCryptoHook_InitFlags_SimpleForkCheck;
CRYPTO_THREAD_unlock(chil_lock);
break;
/*
* This will prevent the initialisation function from "installing"
* the mutex-handling callbacks, even if they are available from
* within the library (or were provided to the library from the
* calling application). This is to remove any baggage for
* applications not using multithreading.
*/
case ENGINE_CTRL_CHIL_NO_LOCKING:
CRYPTO_THREAD_write_lock(chil_lock);
disable_mutex_callbacks = 1;
CRYPTO_THREAD_unlock(chil_lock);
break;
case HWCRHK_CMD_THREAD_LOCKING:
CRYPTO_THREAD_write_lock(chil_lock);
disable_mutex_callbacks = ((i == 0) ? 0 : 1);
CRYPTO_THREAD_unlock(chil_lock);
break;
/* The command isn't understood by this engine */
default:
HWCRHKerr(HWCRHK_F_HWCRHK_CTRL,
HWCRHK_R_CTRL_COMMAND_NOT_IMPLEMENTED);
to_return = 0;
break;
}
return to_return;
}
static EVP_PKEY *hwcrhk_load_privkey(ENGINE *eng, const char *key_id,
UI_METHOD *ui_method,
void *callback_data)
{
# ifndef OPENSSL_NO_RSA
RSA *rtmp = NULL;
# endif
EVP_PKEY *res = NULL;
# ifndef OPENSSL_NO_RSA
HWCryptoHook_MPI e, n;
HWCryptoHook_RSAKeyHandle *hptr;
# endif
# if !defined(OPENSSL_NO_RSA)
char tempbuf[1024];
HWCryptoHook_ErrMsgBuf rmsg;
HWCryptoHook_PassphraseContext ppctx;
# endif
# if !defined(OPENSSL_NO_RSA)
rmsg.buf = tempbuf;
rmsg.size = sizeof(tempbuf);
# endif
if (!hwcrhk_context) {
HWCRHKerr(HWCRHK_F_HWCRHK_LOAD_PRIVKEY, HWCRHK_R_NOT_INITIALISED);
goto err;
}
# ifndef OPENSSL_NO_RSA
hptr = OPENSSL_malloc(sizeof(*hptr));
if (hptr == NULL) {
HWCRHKerr(HWCRHK_F_HWCRHK_LOAD_PRIVKEY, ERR_R_MALLOC_FAILURE);
goto err;
}
ppctx.ui_method = ui_method;
ppctx.callback_data = callback_data;
if (p_hwcrhk_RSALoadKey(hwcrhk_context, key_id, hptr, &rmsg, &ppctx)) {
HWCRHKerr(HWCRHK_F_HWCRHK_LOAD_PRIVKEY, HWCRHK_R_CHIL_ERROR);
ERR_add_error_data(1, rmsg.buf);
goto err;
}
if (!*hptr) {
HWCRHKerr(HWCRHK_F_HWCRHK_LOAD_PRIVKEY, HWCRHK_R_NO_KEY);
goto err;
}
# endif
# ifndef OPENSSL_NO_RSA
rtmp = RSA_new_method(eng);
RSA_set_ex_data(rtmp, hndidx_rsa, (char *)hptr);
rtmp->e = BN_new();
rtmp->n = BN_new();
rtmp->flags |= RSA_FLAG_EXT_PKEY;
MPI2BN(rtmp->e, e);
MPI2BN(rtmp->n, n);
if (p_hwcrhk_RSAGetPublicKey(*hptr, &n, &e, &rmsg)
!= HWCRYPTOHOOK_ERROR_MPISIZE) {
HWCRHKerr(HWCRHK_F_HWCRHK_LOAD_PRIVKEY, HWCRHK_R_CHIL_ERROR);
ERR_add_error_data(1, rmsg.buf);
goto err;
}
bn_expand2(rtmp->e, e.size / sizeof(BN_ULONG));
bn_expand2(rtmp->n, n.size / sizeof(BN_ULONG));
MPI2BN(rtmp->e, e);
MPI2BN(rtmp->n, n);
if (p_hwcrhk_RSAGetPublicKey(*hptr, &n, &e, &rmsg)) {
HWCRHKerr(HWCRHK_F_HWCRHK_LOAD_PRIVKEY, HWCRHK_R_CHIL_ERROR);
ERR_add_error_data(1, rmsg.buf);
goto err;
}
rtmp->e->top = e.size / sizeof(BN_ULONG);
bn_fix_top(rtmp->e);
rtmp->n->top = n.size / sizeof(BN_ULONG);
bn_fix_top(rtmp->n);
res = EVP_PKEY_new();
if (res == NULL) {
HWCRHKerr(HWCRHK_F_HWCRHK_LOAD_PRIVKEY, HWCRHK_R_CHIL_ERROR);
goto err;
}
EVP_PKEY_assign_RSA(res, rtmp);
# endif
if (res == NULL)
HWCRHKerr(HWCRHK_F_HWCRHK_LOAD_PRIVKEY,
HWCRHK_R_PRIVATE_KEY_ALGORITHMS_DISABLED);
return res;
err:
# ifndef OPENSSL_NO_RSA
RSA_free(rtmp);
# endif
return NULL;
}
static EVP_PKEY *hwcrhk_load_pubkey(ENGINE *eng, const char *key_id,
UI_METHOD *ui_method, void *callback_data)
{
EVP_PKEY *res = NULL;
# ifndef OPENSSL_NO_RSA
res = hwcrhk_load_privkey(eng, key_id, ui_method, callback_data);
# endif
if (res)
switch (res->type) {
# ifndef OPENSSL_NO_RSA
case EVP_PKEY_RSA:
{
RSA *rsa = NULL;
CRYPTO_THREAD_write_lock(chil_lock);
rsa = res->pkey.rsa;
res->pkey.rsa = RSA_new();
res->pkey.rsa->n = rsa->n;
res->pkey.rsa->e = rsa->e;
rsa->n = NULL;
rsa->e = NULL;
CRYPTO_THREAD_unlock(chil_lock);
RSA_free(rsa);
}
break;
# endif
default:
HWCRHKerr(HWCRHK_F_HWCRHK_LOAD_PUBKEY,
HWCRHK_R_CTRL_COMMAND_NOT_IMPLEMENTED);
goto err;
}
return res;
err:
EVP_PKEY_free(res);
return NULL;
}
/* A little mod_exp */
static int hwcrhk_mod_exp(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
const BIGNUM *m, BN_CTX *ctx)
{
char tempbuf[1024];
HWCryptoHook_ErrMsgBuf rmsg;
/*
* Since HWCryptoHook_MPI is pretty compatible with BIGNUM's, we use them
* directly, plus a little macro magic. We only thing we need to make
* sure of is that enough space is allocated.
*/
HWCryptoHook_MPI m_a, m_p, m_n, m_r;
int to_return, ret;
to_return = 0; /* expect failure */
rmsg.buf = tempbuf;
rmsg.size = sizeof(tempbuf);
if (!hwcrhk_context) {
HWCRHKerr(HWCRHK_F_HWCRHK_MOD_EXP, HWCRHK_R_NOT_INITIALISED);
goto err;
}
/* Prepare the params */
bn_expand2(r, m->top); /* Check for error !! */
BN2MPI(m_a, a);
BN2MPI(m_p, p);
BN2MPI(m_n, m);
MPI2BN(r, m_r);
/* Perform the operation */
ret = p_hwcrhk_ModExp(hwcrhk_context, m_a, m_p, m_n, &m_r, &rmsg);
/* Convert the response */
r->top = m_r.size / sizeof(BN_ULONG);
bn_fix_top(r);
if (ret < 0) {
/*
* FIXME: When this error is returned, HWCryptoHook is telling us
* that falling back to software computation might be a good thing.
*/
if (ret == HWCRYPTOHOOK_ERROR_FALLBACK) {
HWCRHKerr(HWCRHK_F_HWCRHK_MOD_EXP, HWCRHK_R_REQUEST_FALLBACK);
} else {
HWCRHKerr(HWCRHK_F_HWCRHK_MOD_EXP, HWCRHK_R_REQUEST_FAILED);
}
ERR_add_error_data(1, rmsg.buf);
goto err;
}
to_return = 1;
err:
return to_return;
}
# ifndef OPENSSL_NO_RSA
static int hwcrhk_rsa_mod_exp(BIGNUM *r, const BIGNUM *I, RSA *rsa,
BN_CTX *ctx)
{
char tempbuf[1024];
HWCryptoHook_ErrMsgBuf rmsg;
HWCryptoHook_RSAKeyHandle *hptr;
int to_return = 0, ret;
rmsg.buf = tempbuf;
rmsg.size = sizeof(tempbuf);
if (!hwcrhk_context) {
HWCRHKerr(HWCRHK_F_HWCRHK_RSA_MOD_EXP, HWCRHK_R_NOT_INITIALISED);
goto err;
}
/*
* This provides support for nForce keys. Since that's opaque data all
* we do is provide a handle to the proper key and let HWCryptoHook take
* care of the rest.
*/
if ((hptr =
(HWCryptoHook_RSAKeyHandle *) RSA_get_ex_data(rsa, hndidx_rsa))
!= NULL) {
HWCryptoHook_MPI m_a, m_r;
if (!rsa->n) {
HWCRHKerr(HWCRHK_F_HWCRHK_RSA_MOD_EXP,
HWCRHK_R_MISSING_KEY_COMPONENTS);
goto err;
}
/* Prepare the params */
bn_expand2(r, rsa->n->top); /* Check for error !! */
BN2MPI(m_a, I);
MPI2BN(r, m_r);
/* Perform the operation */
ret = p_hwcrhk_RSA(m_a, *hptr, &m_r, &rmsg);
/* Convert the response */
r->top = m_r.size / sizeof(BN_ULONG);
bn_fix_top(r);
if (ret < 0) {
/*
* FIXME: When this error is returned, HWCryptoHook is telling us
* that falling back to software computation might be a good
* thing.
*/
if (ret == HWCRYPTOHOOK_ERROR_FALLBACK) {
HWCRHKerr(HWCRHK_F_HWCRHK_RSA_MOD_EXP,