source: EcnlProtoTool/trunk/openssl-1.1.0e/engines/e_padlock.c@ 331

Last change on this file since 331 was 331, checked in by coas-nagasima, 6 years ago

prototoolに関連するプロジェクトをnewlibからmuslを使うよう変更・更新
ntshellをnewlibの下位の実装から、muslのsyscallの実装に変更・更新
以下のOSSをアップデート
・mruby-1.3.0
・musl-1.1.18
・onigmo-6.1.3
・tcc-0.9.27
以下のOSSを追加
・openssl-1.1.0e
・curl-7.57.0
・zlib-1.2.11
以下のmrbgemsを追加
・iij/mruby-digest
・iij/mruby-env
・iij/mruby-errno
・iij/mruby-iijson
・iij/mruby-ipaddr
・iij/mruby-mock
・iij/mruby-require
・iij/mruby-tls-openssl
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  • Property svn:mime-type set to text/x-csrc
File size: 22.7 KB
Line 
1/*
2 * Copyright 2004-2016 The OpenSSL Project Authors. All Rights Reserved.
3 *
4 * Licensed under the OpenSSL license (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
8 */
9
10#include <stdio.h>
11#include <string.h>
12
13#include <openssl/opensslconf.h>
14#include <openssl/crypto.h>
15#include <openssl/engine.h>
16#include <openssl/evp.h>
17#include <openssl/aes.h>
18#include <openssl/rand.h>
19#include <openssl/err.h>
20#include <openssl/modes.h>
21
22#ifndef OPENSSL_NO_HW
23# ifndef OPENSSL_NO_HW_PADLOCK
24
25/* Attempt to have a single source for both 0.9.7 and 0.9.8 :-) */
26# if (OPENSSL_VERSION_NUMBER >= 0x00908000L)
27# ifndef OPENSSL_NO_DYNAMIC_ENGINE
28# define DYNAMIC_ENGINE
29# endif
30# elif (OPENSSL_VERSION_NUMBER >= 0x00907000L)
31# ifdef ENGINE_DYNAMIC_SUPPORT
32# define DYNAMIC_ENGINE
33# endif
34# else
35# error "Only OpenSSL >= 0.9.7 is supported"
36# endif
37
38/*
39 * VIA PadLock AES is available *ONLY* on some x86 CPUs. Not only that it
40 * doesn't exist elsewhere, but it even can't be compiled on other platforms!
41 */
42
43# undef COMPILE_HW_PADLOCK
44# if !defined(I386_ONLY) && defined(PADLOCK_ASM)
45# define COMPILE_HW_PADLOCK
46# ifdef OPENSSL_NO_DYNAMIC_ENGINE
47static ENGINE *ENGINE_padlock(void);
48# endif
49# endif
50
51# ifdef OPENSSL_NO_DYNAMIC_ENGINE
52void engine_load_padlock_int(void);
53void engine_load_padlock_int(void)
54{
55/* On non-x86 CPUs it just returns. */
56# ifdef COMPILE_HW_PADLOCK
57 ENGINE *toadd = ENGINE_padlock();
58 if (!toadd)
59 return;
60 ENGINE_add(toadd);
61 ENGINE_free(toadd);
62 ERR_clear_error();
63# endif
64}
65
66# endif
67
68# ifdef COMPILE_HW_PADLOCK
69
70/* Function for ENGINE detection and control */
71static int padlock_available(void);
72static int padlock_init(ENGINE *e);
73
74/* RNG Stuff */
75static RAND_METHOD padlock_rand;
76
77/* Cipher Stuff */
78static int padlock_ciphers(ENGINE *e, const EVP_CIPHER **cipher,
79 const int **nids, int nid);
80
81/* Engine names */
82static const char *padlock_id = "padlock";
83static char padlock_name[100];
84
85/* Available features */
86static int padlock_use_ace = 0; /* Advanced Cryptography Engine */
87static int padlock_use_rng = 0; /* Random Number Generator */
88
89/* ===== Engine "management" functions ===== */
90
91/* Prepare the ENGINE structure for registration */
92static int padlock_bind_helper(ENGINE *e)
93{
94 /* Check available features */
95 padlock_available();
96
97 /*
98 * RNG is currently disabled for reasons discussed in commentary just
99 * before padlock_rand_bytes function.
100 */
101 padlock_use_rng = 0;
102
103 /* Generate a nice engine name with available features */
104 BIO_snprintf(padlock_name, sizeof(padlock_name),
105 "VIA PadLock (%s, %s)",
106 padlock_use_rng ? "RNG" : "no-RNG",
107 padlock_use_ace ? "ACE" : "no-ACE");
108
109 /* Register everything or return with an error */
110 if (!ENGINE_set_id(e, padlock_id) ||
111 !ENGINE_set_name(e, padlock_name) ||
112 !ENGINE_set_init_function(e, padlock_init) ||
113 (padlock_use_ace && !ENGINE_set_ciphers(e, padlock_ciphers)) ||
114 (padlock_use_rng && !ENGINE_set_RAND(e, &padlock_rand))) {
115 return 0;
116 }
117
118 /* Everything looks good */
119 return 1;
120}
121
122# ifdef OPENSSL_NO_DYNAMIC_ENGINE
123/* Constructor */
124static ENGINE *ENGINE_padlock(void)
125{
126 ENGINE *eng = ENGINE_new();
127
128 if (eng == NULL) {
129 return NULL;
130 }
131
132 if (!padlock_bind_helper(eng)) {
133 ENGINE_free(eng);
134 return NULL;
135 }
136
137 return eng;
138}
139# endif
140
141/* Check availability of the engine */
142static int padlock_init(ENGINE *e)
143{
144 return (padlock_use_rng || padlock_use_ace);
145}
146
147/*
148 * This stuff is needed if this ENGINE is being compiled into a
149 * self-contained shared-library.
150 */
151# ifdef DYNAMIC_ENGINE
152static int padlock_bind_fn(ENGINE *e, const char *id)
153{
154 if (id && (strcmp(id, padlock_id) != 0)) {
155 return 0;
156 }
157
158 if (!padlock_bind_helper(e)) {
159 return 0;
160 }
161
162 return 1;
163}
164
165IMPLEMENT_DYNAMIC_CHECK_FN()
166IMPLEMENT_DYNAMIC_BIND_FN(padlock_bind_fn)
167# endif /* DYNAMIC_ENGINE */
168/* ===== Here comes the "real" engine ===== */
169
170/* Some AES-related constants */
171# define AES_BLOCK_SIZE 16
172# define AES_KEY_SIZE_128 16
173# define AES_KEY_SIZE_192 24
174# define AES_KEY_SIZE_256 32
175 /*
176 * Here we store the status information relevant to the current context.
177 */
178 /*
179 * BIG FAT WARNING: Inline assembler in PADLOCK_XCRYPT_ASM() depends on
180 * the order of items in this structure. Don't blindly modify, reorder,
181 * etc!
182 */
183struct padlock_cipher_data {
184 unsigned char iv[AES_BLOCK_SIZE]; /* Initialization vector */
185 union {
186 unsigned int pad[4];
187 struct {
188 int rounds:4;
189 int dgst:1; /* n/a in C3 */
190 int align:1; /* n/a in C3 */
191 int ciphr:1; /* n/a in C3 */
192 unsigned int keygen:1;
193 int interm:1;
194 unsigned int encdec:1;
195 int ksize:2;
196 } b;
197 } cword; /* Control word */
198 AES_KEY ks; /* Encryption key */
199};
200
201/* Interface to assembler module */
202unsigned int padlock_capability();
203void padlock_key_bswap(AES_KEY *key);
204void padlock_verify_context(struct padlock_cipher_data *ctx);
205void padlock_reload_key();
206void padlock_aes_block(void *out, const void *inp,
207 struct padlock_cipher_data *ctx);
208int padlock_ecb_encrypt(void *out, const void *inp,
209 struct padlock_cipher_data *ctx, size_t len);
210int padlock_cbc_encrypt(void *out, const void *inp,
211 struct padlock_cipher_data *ctx, size_t len);
212int padlock_cfb_encrypt(void *out, const void *inp,
213 struct padlock_cipher_data *ctx, size_t len);
214int padlock_ofb_encrypt(void *out, const void *inp,
215 struct padlock_cipher_data *ctx, size_t len);
216int padlock_ctr32_encrypt(void *out, const void *inp,
217 struct padlock_cipher_data *ctx, size_t len);
218int padlock_xstore(void *out, int edx);
219void padlock_sha1_oneshot(void *ctx, const void *inp, size_t len);
220void padlock_sha1(void *ctx, const void *inp, size_t len);
221void padlock_sha256_oneshot(void *ctx, const void *inp, size_t len);
222void padlock_sha256(void *ctx, const void *inp, size_t len);
223
224/*
225 * Load supported features of the CPU to see if the PadLock is available.
226 */
227static int padlock_available(void)
228{
229 unsigned int edx = padlock_capability();
230
231 /* Fill up some flags */
232 padlock_use_ace = ((edx & (0x3 << 6)) == (0x3 << 6));
233 padlock_use_rng = ((edx & (0x3 << 2)) == (0x3 << 2));
234
235 return padlock_use_ace + padlock_use_rng;
236}
237
238/* ===== AES encryption/decryption ===== */
239
240# if defined(NID_aes_128_cfb128) && ! defined (NID_aes_128_cfb)
241# define NID_aes_128_cfb NID_aes_128_cfb128
242# endif
243
244# if defined(NID_aes_128_ofb128) && ! defined (NID_aes_128_ofb)
245# define NID_aes_128_ofb NID_aes_128_ofb128
246# endif
247
248# if defined(NID_aes_192_cfb128) && ! defined (NID_aes_192_cfb)
249# define NID_aes_192_cfb NID_aes_192_cfb128
250# endif
251
252# if defined(NID_aes_192_ofb128) && ! defined (NID_aes_192_ofb)
253# define NID_aes_192_ofb NID_aes_192_ofb128
254# endif
255
256# if defined(NID_aes_256_cfb128) && ! defined (NID_aes_256_cfb)
257# define NID_aes_256_cfb NID_aes_256_cfb128
258# endif
259
260# if defined(NID_aes_256_ofb128) && ! defined (NID_aes_256_ofb)
261# define NID_aes_256_ofb NID_aes_256_ofb128
262# endif
263
264/* List of supported ciphers. */
265static const int padlock_cipher_nids[] = {
266 NID_aes_128_ecb,
267 NID_aes_128_cbc,
268 NID_aes_128_cfb,
269 NID_aes_128_ofb,
270 NID_aes_128_ctr,
271
272 NID_aes_192_ecb,
273 NID_aes_192_cbc,
274 NID_aes_192_cfb,
275 NID_aes_192_ofb,
276 NID_aes_192_ctr,
277
278 NID_aes_256_ecb,
279 NID_aes_256_cbc,
280 NID_aes_256_cfb,
281 NID_aes_256_ofb,
282 NID_aes_256_ctr
283};
284
285static int padlock_cipher_nids_num = (sizeof(padlock_cipher_nids) /
286 sizeof(padlock_cipher_nids[0]));
287
288/* Function prototypes ... */
289static int padlock_aes_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
290 const unsigned char *iv, int enc);
291
292# define NEAREST_ALIGNED(ptr) ( (unsigned char *)(ptr) + \
293 ( (0x10 - ((size_t)(ptr) & 0x0F)) & 0x0F ) )
294# define ALIGNED_CIPHER_DATA(ctx) ((struct padlock_cipher_data *)\
295 NEAREST_ALIGNED(EVP_CIPHER_CTX_get_cipher_data(ctx)))
296
297static int
298padlock_ecb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out_arg,
299 const unsigned char *in_arg, size_t nbytes)
300{
301 return padlock_ecb_encrypt(out_arg, in_arg,
302 ALIGNED_CIPHER_DATA(ctx), nbytes);
303}
304
305static int
306padlock_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out_arg,
307 const unsigned char *in_arg, size_t nbytes)
308{
309 struct padlock_cipher_data *cdata = ALIGNED_CIPHER_DATA(ctx);
310 int ret;
311
312 memcpy(cdata->iv, EVP_CIPHER_CTX_iv(ctx), AES_BLOCK_SIZE);
313 if ((ret = padlock_cbc_encrypt(out_arg, in_arg, cdata, nbytes)))
314 memcpy(EVP_CIPHER_CTX_iv_noconst(ctx), cdata->iv, AES_BLOCK_SIZE);
315 return ret;
316}
317
318static int
319padlock_cfb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out_arg,
320 const unsigned char *in_arg, size_t nbytes)
321{
322 struct padlock_cipher_data *cdata = ALIGNED_CIPHER_DATA(ctx);
323 size_t chunk;
324
325 if ((chunk = EVP_CIPHER_CTX_num(ctx))) { /* borrow chunk variable */
326 unsigned char *ivp = EVP_CIPHER_CTX_iv_noconst(ctx);
327
328 if (chunk >= AES_BLOCK_SIZE)
329 return 0; /* bogus value */
330
331 if (EVP_CIPHER_CTX_encrypting(ctx))
332 while (chunk < AES_BLOCK_SIZE && nbytes != 0) {
333 ivp[chunk] = *(out_arg++) = *(in_arg++) ^ ivp[chunk];
334 chunk++, nbytes--;
335 } else
336 while (chunk < AES_BLOCK_SIZE && nbytes != 0) {
337 unsigned char c = *(in_arg++);
338 *(out_arg++) = c ^ ivp[chunk];
339 ivp[chunk++] = c, nbytes--;
340 }
341
342 EVP_CIPHER_CTX_set_num(ctx, chunk % AES_BLOCK_SIZE);
343 }
344
345 if (nbytes == 0)
346 return 1;
347
348 memcpy(cdata->iv, EVP_CIPHER_CTX_iv(ctx), AES_BLOCK_SIZE);
349
350 if ((chunk = nbytes & ~(AES_BLOCK_SIZE - 1))) {
351 if (!padlock_cfb_encrypt(out_arg, in_arg, cdata, chunk))
352 return 0;
353 nbytes -= chunk;
354 }
355
356 if (nbytes) {
357 unsigned char *ivp = cdata->iv;
358
359 out_arg += chunk;
360 in_arg += chunk;
361 EVP_CIPHER_CTX_set_num(ctx, nbytes);
362 if (cdata->cword.b.encdec) {
363 cdata->cword.b.encdec = 0;
364 padlock_reload_key();
365 padlock_aes_block(ivp, ivp, cdata);
366 cdata->cword.b.encdec = 1;
367 padlock_reload_key();
368 while (nbytes) {
369 unsigned char c = *(in_arg++);
370 *(out_arg++) = c ^ *ivp;
371 *(ivp++) = c, nbytes--;
372 }
373 } else {
374 padlock_reload_key();
375 padlock_aes_block(ivp, ivp, cdata);
376 padlock_reload_key();
377 while (nbytes) {
378 *ivp = *(out_arg++) = *(in_arg++) ^ *ivp;
379 ivp++, nbytes--;
380 }
381 }
382 }
383
384 memcpy(EVP_CIPHER_CTX_iv_noconst(ctx), cdata->iv, AES_BLOCK_SIZE);
385
386 return 1;
387}
388
389static int
390padlock_ofb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out_arg,
391 const unsigned char *in_arg, size_t nbytes)
392{
393 struct padlock_cipher_data *cdata = ALIGNED_CIPHER_DATA(ctx);
394 size_t chunk;
395
396 /*
397 * ctx->num is maintained in byte-oriented modes, such as CFB and OFB...
398 */
399 if ((chunk = EVP_CIPHER_CTX_num(ctx))) { /* borrow chunk variable */
400 unsigned char *ivp = EVP_CIPHER_CTX_iv_noconst(ctx);
401
402 if (chunk >= AES_BLOCK_SIZE)
403 return 0; /* bogus value */
404
405 while (chunk < AES_BLOCK_SIZE && nbytes != 0) {
406 *(out_arg++) = *(in_arg++) ^ ivp[chunk];
407 chunk++, nbytes--;
408 }
409
410 EVP_CIPHER_CTX_set_num(ctx, chunk % AES_BLOCK_SIZE);
411 }
412
413 if (nbytes == 0)
414 return 1;
415
416 memcpy(cdata->iv, EVP_CIPHER_CTX_iv(ctx), AES_BLOCK_SIZE);
417
418 if ((chunk = nbytes & ~(AES_BLOCK_SIZE - 1))) {
419 if (!padlock_ofb_encrypt(out_arg, in_arg, cdata, chunk))
420 return 0;
421 nbytes -= chunk;
422 }
423
424 if (nbytes) {
425 unsigned char *ivp = cdata->iv;
426
427 out_arg += chunk;
428 in_arg += chunk;
429 EVP_CIPHER_CTX_set_num(ctx, nbytes);
430 padlock_reload_key(); /* empirically found */
431 padlock_aes_block(ivp, ivp, cdata);
432 padlock_reload_key(); /* empirically found */
433 while (nbytes) {
434 *(out_arg++) = *(in_arg++) ^ *ivp;
435 ivp++, nbytes--;
436 }
437 }
438
439 memcpy(EVP_CIPHER_CTX_iv_noconst(ctx), cdata->iv, AES_BLOCK_SIZE);
440
441 return 1;
442}
443
444static void padlock_ctr32_encrypt_glue(const unsigned char *in,
445 unsigned char *out, size_t blocks,
446 struct padlock_cipher_data *ctx,
447 const unsigned char *ivec)
448{
449 memcpy(ctx->iv, ivec, AES_BLOCK_SIZE);
450 padlock_ctr32_encrypt(out, in, ctx, AES_BLOCK_SIZE * blocks);
451}
452
453static int
454padlock_ctr_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out_arg,
455 const unsigned char *in_arg, size_t nbytes)
456{
457 struct padlock_cipher_data *cdata = ALIGNED_CIPHER_DATA(ctx);
458 unsigned int num = EVP_CIPHER_CTX_num(ctx);
459
460 CRYPTO_ctr128_encrypt_ctr32(in_arg, out_arg, nbytes,
461 cdata, EVP_CIPHER_CTX_iv_noconst(ctx),
462 EVP_CIPHER_CTX_buf_noconst(ctx), &num,
463 (ctr128_f) padlock_ctr32_encrypt_glue);
464
465 EVP_CIPHER_CTX_set_num(ctx, (size_t)num);
466 return 1;
467}
468
469# define EVP_CIPHER_block_size_ECB AES_BLOCK_SIZE
470# define EVP_CIPHER_block_size_CBC AES_BLOCK_SIZE
471# define EVP_CIPHER_block_size_OFB 1
472# define EVP_CIPHER_block_size_CFB 1
473# define EVP_CIPHER_block_size_CTR 1
474
475/*
476 * Declaring so many ciphers by hand would be a pain. Instead introduce a bit
477 * of preprocessor magic :-)
478 */
479# define DECLARE_AES_EVP(ksize,lmode,umode) \
480static EVP_CIPHER *_hidden_aes_##ksize##_##lmode = NULL; \
481static const EVP_CIPHER *padlock_aes_##ksize##_##lmode(void) \
482{ \
483 if (_hidden_aes_##ksize##_##lmode == NULL \
484 && ((_hidden_aes_##ksize##_##lmode = \
485 EVP_CIPHER_meth_new(NID_aes_##ksize##_##lmode, \
486 EVP_CIPHER_block_size_##umode, \
487 AES_KEY_SIZE_##ksize)) == NULL \
488 || !EVP_CIPHER_meth_set_iv_length(_hidden_aes_##ksize##_##lmode, \
489 AES_BLOCK_SIZE) \
490 || !EVP_CIPHER_meth_set_flags(_hidden_aes_##ksize##_##lmode, \
491 0 | EVP_CIPH_##umode##_MODE) \
492 || !EVP_CIPHER_meth_set_init(_hidden_aes_##ksize##_##lmode, \
493 padlock_aes_init_key) \
494 || !EVP_CIPHER_meth_set_do_cipher(_hidden_aes_##ksize##_##lmode, \
495 padlock_##lmode##_cipher) \
496 || !EVP_CIPHER_meth_set_impl_ctx_size(_hidden_aes_##ksize##_##lmode, \
497 sizeof(struct padlock_cipher_data) + 16) \
498 || !EVP_CIPHER_meth_set_set_asn1_params(_hidden_aes_##ksize##_##lmode, \
499 EVP_CIPHER_set_asn1_iv) \
500 || !EVP_CIPHER_meth_set_get_asn1_params(_hidden_aes_##ksize##_##lmode, \
501 EVP_CIPHER_get_asn1_iv))) { \
502 EVP_CIPHER_meth_free(_hidden_aes_##ksize##_##lmode); \
503 _hidden_aes_##ksize##_##lmode = NULL; \
504 } \
505 return _hidden_aes_##ksize##_##lmode; \
506}
507
508DECLARE_AES_EVP(128, ecb, ECB)
509DECLARE_AES_EVP(128, cbc, CBC)
510DECLARE_AES_EVP(128, cfb, CFB)
511DECLARE_AES_EVP(128, ofb, OFB)
512DECLARE_AES_EVP(128, ctr, CTR)
513
514DECLARE_AES_EVP(192, ecb, ECB)
515DECLARE_AES_EVP(192, cbc, CBC)
516DECLARE_AES_EVP(192, cfb, CFB)
517DECLARE_AES_EVP(192, ofb, OFB)
518DECLARE_AES_EVP(192, ctr, CTR)
519
520DECLARE_AES_EVP(256, ecb, ECB)
521DECLARE_AES_EVP(256, cbc, CBC)
522DECLARE_AES_EVP(256, cfb, CFB)
523DECLARE_AES_EVP(256, ofb, OFB)
524DECLARE_AES_EVP(256, ctr, CTR)
525
526static int
527padlock_ciphers(ENGINE *e, const EVP_CIPHER **cipher, const int **nids,
528 int nid)
529{
530 /* No specific cipher => return a list of supported nids ... */
531 if (!cipher) {
532 *nids = padlock_cipher_nids;
533 return padlock_cipher_nids_num;
534 }
535
536 /* ... or the requested "cipher" otherwise */
537 switch (nid) {
538 case NID_aes_128_ecb:
539 *cipher = padlock_aes_128_ecb();
540 break;
541 case NID_aes_128_cbc:
542 *cipher = padlock_aes_128_cbc();
543 break;
544 case NID_aes_128_cfb:
545 *cipher = padlock_aes_128_cfb();
546 break;
547 case NID_aes_128_ofb:
548 *cipher = padlock_aes_128_ofb();
549 break;
550 case NID_aes_128_ctr:
551 *cipher = padlock_aes_128_ctr();
552 break;
553
554 case NID_aes_192_ecb:
555 *cipher = padlock_aes_192_ecb();
556 break;
557 case NID_aes_192_cbc:
558 *cipher = padlock_aes_192_cbc();
559 break;
560 case NID_aes_192_cfb:
561 *cipher = padlock_aes_192_cfb();
562 break;
563 case NID_aes_192_ofb:
564 *cipher = padlock_aes_192_ofb();
565 break;
566 case NID_aes_192_ctr:
567 *cipher = padlock_aes_192_ctr();
568 break;
569
570 case NID_aes_256_ecb:
571 *cipher = padlock_aes_256_ecb();
572 break;
573 case NID_aes_256_cbc:
574 *cipher = padlock_aes_256_cbc();
575 break;
576 case NID_aes_256_cfb:
577 *cipher = padlock_aes_256_cfb();
578 break;
579 case NID_aes_256_ofb:
580 *cipher = padlock_aes_256_ofb();
581 break;
582 case NID_aes_256_ctr:
583 *cipher = padlock_aes_256_ctr();
584 break;
585
586 default:
587 /* Sorry, we don't support this NID */
588 *cipher = NULL;
589 return 0;
590 }
591
592 return 1;
593}
594
595/* Prepare the encryption key for PadLock usage */
596static int
597padlock_aes_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
598 const unsigned char *iv, int enc)
599{
600 struct padlock_cipher_data *cdata;
601 int key_len = EVP_CIPHER_CTX_key_length(ctx) * 8;
602 unsigned long mode = EVP_CIPHER_CTX_mode(ctx);
603
604 if (key == NULL)
605 return 0; /* ERROR */
606
607 cdata = ALIGNED_CIPHER_DATA(ctx);
608 memset(cdata, 0, sizeof(*cdata));
609
610 /* Prepare Control word. */
611 if (mode == EVP_CIPH_OFB_MODE || mode == EVP_CIPH_CTR_MODE)
612 cdata->cword.b.encdec = 0;
613 else
614 cdata->cword.b.encdec = (EVP_CIPHER_CTX_encrypting(ctx) == 0);
615 cdata->cword.b.rounds = 10 + (key_len - 128) / 32;
616 cdata->cword.b.ksize = (key_len - 128) / 64;
617
618 switch (key_len) {
619 case 128:
620 /*
621 * PadLock can generate an extended key for AES128 in hardware
622 */
623 memcpy(cdata->ks.rd_key, key, AES_KEY_SIZE_128);
624 cdata->cword.b.keygen = 0;
625 break;
626
627 case 192:
628 case 256:
629 /*
630 * Generate an extended AES key in software. Needed for AES192/AES256
631 */
632 /*
633 * Well, the above applies to Stepping 8 CPUs and is listed as
634 * hardware errata. They most likely will fix it at some point and
635 * then a check for stepping would be due here.
636 */
637 if ((mode == EVP_CIPH_ECB_MODE || mode == EVP_CIPH_CBC_MODE)
638 && !enc)
639 AES_set_decrypt_key(key, key_len, &cdata->ks);
640 else
641 AES_set_encrypt_key(key, key_len, &cdata->ks);
642# ifndef AES_ASM
643 /*
644 * OpenSSL C functions use byte-swapped extended key.
645 */
646 padlock_key_bswap(&cdata->ks);
647# endif
648 cdata->cword.b.keygen = 1;
649 break;
650
651 default:
652 /* ERROR */
653 return 0;
654 }
655
656 /*
657 * This is done to cover for cases when user reuses the
658 * context for new key. The catch is that if we don't do
659 * this, padlock_eas_cipher might proceed with old key...
660 */
661 padlock_reload_key();
662
663 return 1;
664}
665
666/* ===== Random Number Generator ===== */
667/*
668 * This code is not engaged. The reason is that it does not comply
669 * with recommendations for VIA RNG usage for secure applications
670 * (posted at http://www.via.com.tw/en/viac3/c3.jsp) nor does it
671 * provide meaningful error control...
672 */
673/*
674 * Wrapper that provides an interface between the API and the raw PadLock
675 * RNG
676 */
677static int padlock_rand_bytes(unsigned char *output, int count)
678{
679 unsigned int eax, buf;
680
681 while (count >= 8) {
682 eax = padlock_xstore(output, 0);
683 if (!(eax & (1 << 6)))
684 return 0; /* RNG disabled */
685 /* this ---vv--- covers DC bias, Raw Bits and String Filter */
686 if (eax & (0x1F << 10))
687 return 0;
688 if ((eax & 0x1F) == 0)
689 continue; /* no data, retry... */
690 if ((eax & 0x1F) != 8)
691 return 0; /* fatal failure... */
692 output += 8;
693 count -= 8;
694 }
695 while (count > 0) {
696 eax = padlock_xstore(&buf, 3);
697 if (!(eax & (1 << 6)))
698 return 0; /* RNG disabled */
699 /* this ---vv--- covers DC bias, Raw Bits and String Filter */
700 if (eax & (0x1F << 10))
701 return 0;
702 if ((eax & 0x1F) == 0)
703 continue; /* no data, retry... */
704 if ((eax & 0x1F) != 1)
705 return 0; /* fatal failure... */
706 *output++ = (unsigned char)buf;
707 count--;
708 }
709 OPENSSL_cleanse(&buf, sizeof(buf));
710
711 return 1;
712}
713
714/* Dummy but necessary function */
715static int padlock_rand_status(void)
716{
717 return 1;
718}
719
720/* Prepare structure for registration */
721static RAND_METHOD padlock_rand = {
722 NULL, /* seed */
723 padlock_rand_bytes, /* bytes */
724 NULL, /* cleanup */
725 NULL, /* add */
726 padlock_rand_bytes, /* pseudorand */
727 padlock_rand_status, /* rand status */
728};
729
730# endif /* COMPILE_HW_PADLOCK */
731# endif /* !OPENSSL_NO_HW_PADLOCK */
732#endif /* !OPENSSL_NO_HW */
733
734#if defined(OPENSSL_NO_HW) || defined(OPENSSL_NO_HW_PADLOCK) \
735 || !defined(COMPILE_HW_PADLOCK)
736# ifndef OPENSSL_NO_DYNAMIC_ENGINE
737OPENSSL_EXPORT
738 int bind_engine(ENGINE *e, const char *id, const dynamic_fns *fns);
739OPENSSL_EXPORT
740 int bind_engine(ENGINE *e, const char *id, const dynamic_fns *fns)
741{
742 return 0;
743}
744
745IMPLEMENT_DYNAMIC_CHECK_FN()
746# endif
747#endif
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