2 * Support for VIA PadLock Advanced Cryptography Engine (ACE)
3 * Written by Michal Ludvig <michal@logix.cz>
4 * http://www.logix.cz/michal
6 * Big thanks to Andy Polyakov for a help with optimization,
7 * assembler fixes, port to MS Windows and a lot of other
8 * valuable work on this engine!
11 /* ====================================================================
12 * Copyright (c) 1999-2001 The OpenSSL Project. All rights reserved.
14 * Redistribution and use in source and binary forms, with or without
15 * modification, are permitted provided that the following conditions
18 * 1. Redistributions of source code must retain the above copyright
19 * notice, this list of conditions and the following disclaimer.
21 * 2. Redistributions in binary form must reproduce the above copyright
22 * notice, this list of conditions and the following disclaimer in
23 * the documentation and/or other materials provided with the
26 * 3. All advertising materials mentioning features or use of this
27 * software must display the following acknowledgment:
28 * "This product includes software developed by the OpenSSL Project
29 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
31 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
32 * endorse or promote products derived from this software without
33 * prior written permission. For written permission, please contact
34 * licensing@OpenSSL.org.
36 * 5. Products derived from this software may not be called "OpenSSL"
37 * nor may "OpenSSL" appear in their names without prior written
38 * permission of the OpenSSL Project.
40 * 6. Redistributions of any form whatsoever must retain the following
42 * "This product includes software developed by the OpenSSL Project
43 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
45 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
46 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
47 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
48 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
49 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
50 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
51 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
52 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
53 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
54 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
55 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
56 * OF THE POSSIBILITY OF SUCH DAMAGE.
57 * ====================================================================
59 * This product includes cryptographic software written by Eric Young
60 * (eay@cryptsoft.com). This product includes software written by Tim
61 * Hudson (tjh@cryptsoft.com).
69 #include <openssl/opensslconf.h>
70 #include <openssl/crypto.h>
71 #include <openssl/dso.h>
72 #include <openssl/engine.h>
73 #include <openssl/evp.h>
74 #ifndef OPENSSL_NO_AES
75 #include <openssl/aes.h>
77 #include <openssl/rand.h>
78 #include <openssl/err.h>
79 #include <openssl/modes.h>
82 #ifndef OPENSSL_NO_HW_PADLOCK
84 /* Attempt to have a single source for both 0.9.7 and 0.9.8 :-) */
85 #if (OPENSSL_VERSION_NUMBER >= 0x00908000L)
86 # ifndef OPENSSL_NO_DYNAMIC_ENGINE
87 # define DYNAMIC_ENGINE
89 #elif (OPENSSL_VERSION_NUMBER >= 0x00907000L)
90 # ifdef ENGINE_DYNAMIC_SUPPORT
91 # define DYNAMIC_ENGINE
94 # error "Only OpenSSL >= 0.9.7 is supported"
97 /* VIA PadLock AES is available *ONLY* on some x86 CPUs.
98 Not only that it doesn't exist elsewhere, but it
99 even can't be compiled on other platforms! */
101 #undef COMPILE_HW_PADLOCK
102 #if !defined(I386_ONLY) && !defined(OPENSSL_NO_ASM)
103 # if defined(__i386__) || defined(__i386) || \
104 defined(__x86_64__) || defined(__x86_64) || \
105 defined(_M_IX86) || defined(_M_AMD64) || defined(_M_X64) || \
107 # define COMPILE_HW_PADLOCK
108 # ifdef OPENSSL_NO_DYNAMIC_ENGINE
109 static ENGINE *ENGINE_padlock (void);
114 #ifdef OPENSSL_NO_DYNAMIC_ENGINE
116 void ENGINE_load_padlock (void)
118 /* On non-x86 CPUs it just returns. */
119 #ifdef COMPILE_HW_PADLOCK
120 ENGINE *toadd = ENGINE_padlock ();
130 #ifdef COMPILE_HW_PADLOCK
132 /* Function for ENGINE detection and control */
133 static int padlock_available(void);
134 static int padlock_init(ENGINE *e);
137 static RAND_METHOD padlock_rand;
140 #ifndef OPENSSL_NO_AES
141 static int padlock_ciphers(ENGINE *e, const EVP_CIPHER **cipher, const int **nids, int nid);
145 static const char *padlock_id = "padlock";
146 static char padlock_name[100];
148 /* Available features */
149 static int padlock_use_ace = 0; /* Advanced Cryptography Engine */
150 static int padlock_use_rng = 0; /* Random Number Generator */
152 /* ===== Engine "management" functions ===== */
154 /* Prepare the ENGINE structure for registration */
156 padlock_bind_helper(ENGINE *e)
158 /* Check available features */
161 #if 1 /* disable RNG for now, see commentary in vicinity of RNG code */
165 /* Generate a nice engine name with available features */
166 BIO_snprintf(padlock_name, sizeof(padlock_name),
167 "VIA PadLock (%s, %s)",
168 padlock_use_rng ? "RNG" : "no-RNG",
169 padlock_use_ace ? "ACE" : "no-ACE");
171 /* Register everything or return with an error */
172 if (!ENGINE_set_id(e, padlock_id) ||
173 !ENGINE_set_name(e, padlock_name) ||
175 !ENGINE_set_init_function(e, padlock_init) ||
176 #ifndef OPENSSL_NO_AES
177 (padlock_use_ace && !ENGINE_set_ciphers (e, padlock_ciphers)) ||
179 (padlock_use_rng && !ENGINE_set_RAND (e, &padlock_rand))) {
183 /* Everything looks good */
187 #ifdef OPENSSL_NO_DYNAMIC_ENGINE
192 ENGINE *eng = ENGINE_new();
198 if (!padlock_bind_helper(eng)) {
207 /* Check availability of the engine */
209 padlock_init(ENGINE *e)
211 return (padlock_use_rng || padlock_use_ace);
214 /* This stuff is needed if this ENGINE is being compiled into a self-contained
217 #ifdef DYNAMIC_ENGINE
219 padlock_bind_fn(ENGINE *e, const char *id)
221 if (id && (strcmp(id, padlock_id) != 0)) {
225 if (!padlock_bind_helper(e)) {
232 IMPLEMENT_DYNAMIC_CHECK_FN()
233 IMPLEMENT_DYNAMIC_BIND_FN (padlock_bind_fn)
234 #endif /* DYNAMIC_ENGINE */
236 /* ===== Here comes the "real" engine ===== */
238 #ifndef OPENSSL_NO_AES
239 /* Some AES-related constants */
240 #define AES_BLOCK_SIZE 16
241 #define AES_KEY_SIZE_128 16
242 #define AES_KEY_SIZE_192 24
243 #define AES_KEY_SIZE_256 32
245 /* Here we store the status information relevant to the
248 * Inline assembler in PADLOCK_XCRYPT_ASM()
249 * depends on the order of items in this structure.
250 * Don't blindly modify, reorder, etc!
252 struct padlock_cipher_data
254 unsigned char iv[AES_BLOCK_SIZE]; /* Initialization vector */
255 union { unsigned int pad[4];
258 int dgst:1; /* n/a in C3 */
259 int align:1; /* n/a in C3 */
260 int ciphr:1; /* n/a in C3 */
261 unsigned int keygen:1;
263 unsigned int encdec:1;
266 } cword; /* Control word */
267 AES_KEY ks; /* Encryption key */
271 /* Interface to assembler module */
272 unsigned int padlock_capability();
273 void padlock_key_bswap(AES_KEY *key);
274 void padlock_verify_context(struct padlock_cipher_data *ctx);
275 void padlock_reload_key();
276 void padlock_aes_block(void *out, const void *inp,
277 struct padlock_cipher_data *ctx);
278 int padlock_ecb_encrypt(void *out, const void *inp,
279 struct padlock_cipher_data *ctx, size_t len);
280 int padlock_cbc_encrypt(void *out, const void *inp,
281 struct padlock_cipher_data *ctx, size_t len);
282 int padlock_cfb_encrypt(void *out, const void *inp,
283 struct padlock_cipher_data *ctx, size_t len);
284 int padlock_ofb_encrypt(void *out, const void *inp,
285 struct padlock_cipher_data *ctx, size_t len);
286 int padlock_ctr32_encrypt(void *out, const void *inp,
287 struct padlock_cipher_data *ctx, size_t len);
288 int padlock_xstore(void *out,int edx);
289 void padlock_sha1_oneshot(void *ctx,const void *inp,size_t len);
290 void padlock_sha1(void *ctx,const void *inp,size_t len);
291 void padlock_sha256_oneshot(void *ctx,const void *inp,size_t len);
292 void padlock_sha256(void *ctx,const void *inp,size_t len);
294 /* Load supported features of the CPU to see if
295 the PadLock is available. */
297 padlock_available(void)
299 unsigned int edx = padlock_capability();
301 /* Fill up some flags */
302 padlock_use_ace = ((edx & (0x3<<6)) == (0x3<<6));
303 padlock_use_rng = ((edx & (0x3<<2)) == (0x3<<2));
305 return padlock_use_ace + padlock_use_rng;
308 /* ===== AES encryption/decryption ===== */
309 #ifndef OPENSSL_NO_AES
311 #if defined(NID_aes_128_cfb128) && ! defined (NID_aes_128_cfb)
312 #define NID_aes_128_cfb NID_aes_128_cfb128
315 #if defined(NID_aes_128_ofb128) && ! defined (NID_aes_128_ofb)
316 #define NID_aes_128_ofb NID_aes_128_ofb128
319 #if defined(NID_aes_192_cfb128) && ! defined (NID_aes_192_cfb)
320 #define NID_aes_192_cfb NID_aes_192_cfb128
323 #if defined(NID_aes_192_ofb128) && ! defined (NID_aes_192_ofb)
324 #define NID_aes_192_ofb NID_aes_192_ofb128
327 #if defined(NID_aes_256_cfb128) && ! defined (NID_aes_256_cfb)
328 #define NID_aes_256_cfb NID_aes_256_cfb128
331 #if defined(NID_aes_256_ofb128) && ! defined (NID_aes_256_ofb)
332 #define NID_aes_256_ofb NID_aes_256_ofb128
335 /* List of supported ciphers. */
336 static int padlock_cipher_nids[] = {
355 static int padlock_cipher_nids_num = (sizeof(padlock_cipher_nids)/
356 sizeof(padlock_cipher_nids[0]));
358 /* Function prototypes ... */
359 static int padlock_aes_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
360 const unsigned char *iv, int enc);
362 #define NEAREST_ALIGNED(ptr) ( (unsigned char *)(ptr) + \
363 ( (0x10 - ((size_t)(ptr) & 0x0F)) & 0x0F ) )
364 #define ALIGNED_CIPHER_DATA(ctx) ((struct padlock_cipher_data *)\
365 NEAREST_ALIGNED(ctx->cipher_data))
368 padlock_ecb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out_arg,
369 const unsigned char *in_arg, size_t nbytes)
371 return padlock_ecb_encrypt(out_arg,in_arg,
372 ALIGNED_CIPHER_DATA(ctx),nbytes);
375 padlock_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out_arg,
376 const unsigned char *in_arg, size_t nbytes)
378 struct padlock_cipher_data *cdata = ALIGNED_CIPHER_DATA(ctx);
381 memcpy(cdata->iv, ctx->iv, AES_BLOCK_SIZE);
382 if ((ret = padlock_cbc_encrypt(out_arg,in_arg,cdata,nbytes)))
383 memcpy(ctx->iv, cdata->iv, AES_BLOCK_SIZE);
388 padlock_cfb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out_arg,
389 const unsigned char *in_arg, size_t nbytes)
391 struct padlock_cipher_data *cdata = ALIGNED_CIPHER_DATA(ctx);
394 if ((chunk = ctx->num)) { /* borrow chunk variable */
395 unsigned char *ivp=ctx->iv;
397 if (chunk >= AES_BLOCK_SIZE)
398 return 0; /* bogus value */
401 while (chunk<AES_BLOCK_SIZE && nbytes!=0) {
402 ivp[chunk] = *(out_arg++) = *(in_arg++) ^ ivp[chunk];
405 else while (chunk<AES_BLOCK_SIZE && nbytes!=0) {
406 unsigned char c = *(in_arg++);
407 *(out_arg++) = c ^ ivp[chunk];
408 ivp[chunk++] = c, nbytes--;
411 ctx->num = chunk%AES_BLOCK_SIZE;
417 memcpy (cdata->iv, ctx->iv, AES_BLOCK_SIZE);
419 if ((chunk = nbytes & ~(AES_BLOCK_SIZE-1))) {
420 if (!padlock_cfb_encrypt(out_arg,in_arg,cdata,chunk))
426 unsigned char *ivp = cdata->iv;
431 if (cdata->cword.b.encdec) {
432 cdata->cword.b.encdec=0;
433 padlock_reload_key();
434 padlock_aes_block(ivp,ivp,cdata);
435 cdata->cword.b.encdec=1;
436 padlock_reload_key();
438 unsigned char c = *(in_arg++);
439 *(out_arg++) = c ^ *ivp;
440 *(ivp++) = c, nbytes--;
443 else { padlock_reload_key();
444 padlock_aes_block(ivp,ivp,cdata);
445 padlock_reload_key();
447 *ivp = *(out_arg++) = *(in_arg++) ^ *ivp;
453 memcpy(ctx->iv, cdata->iv, AES_BLOCK_SIZE);
459 padlock_ofb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out_arg,
460 const unsigned char *in_arg, size_t nbytes)
462 struct padlock_cipher_data *cdata = ALIGNED_CIPHER_DATA(ctx);
465 /* ctx->num is maintained in byte-oriented modes,
466 such as CFB and OFB... */
467 if ((chunk = ctx->num)) { /* borrow chunk variable */
468 unsigned char *ivp=ctx->iv;
470 if (chunk >= AES_BLOCK_SIZE)
471 return 0; /* bogus value */
473 while (chunk<AES_BLOCK_SIZE && nbytes!=0) {
474 *(out_arg++) = *(in_arg++) ^ ivp[chunk];
478 ctx->num = chunk%AES_BLOCK_SIZE;
484 memcpy(cdata->iv, ctx->iv, AES_BLOCK_SIZE);
486 if ((chunk = nbytes & ~(AES_BLOCK_SIZE-1))) {
487 if (!padlock_ofb_encrypt(out_arg,in_arg,cdata,chunk))
493 unsigned char *ivp = cdata->iv;
498 padlock_reload_key(); /* empirically found */
499 padlock_aes_block(ivp,ivp,cdata);
500 padlock_reload_key(); /* empirically found */
502 *(out_arg++) = *(in_arg++) ^ *ivp;
507 memcpy(ctx->iv, cdata->iv, AES_BLOCK_SIZE);
512 static void padlock_ctr32_encrypt_glue(const unsigned char *in,
513 unsigned char *out, size_t blocks,
514 struct padlock_cipher_data *ctx,
515 const unsigned char *ivec)
517 memcpy(ctx->iv,ivec,AES_BLOCK_SIZE);
518 padlock_ctr32_encrypt(out,in,ctx,AES_BLOCK_SIZE*blocks);
522 padlock_ctr_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out_arg,
523 const unsigned char *in_arg, size_t nbytes)
525 struct padlock_cipher_data *cdata = ALIGNED_CIPHER_DATA(ctx);
526 unsigned int num = ctx->num;
528 CRYPTO_ctr128_encrypt_ctr32(in_arg,out_arg,nbytes,
529 cdata,ctx->iv,ctx->buf,&num,
530 (ctr128_f)padlock_ctr32_encrypt_glue);
532 ctx->num = (size_t)num;
536 #define EVP_CIPHER_block_size_ECB AES_BLOCK_SIZE
537 #define EVP_CIPHER_block_size_CBC AES_BLOCK_SIZE
538 #define EVP_CIPHER_block_size_OFB 1
539 #define EVP_CIPHER_block_size_CFB 1
540 #define EVP_CIPHER_block_size_CTR 1
542 /* Declaring so many ciphers by hand would be a pain.
543 Instead introduce a bit of preprocessor magic :-) */
544 #define DECLARE_AES_EVP(ksize,lmode,umode) \
545 static const EVP_CIPHER padlock_aes_##ksize##_##lmode = { \
546 NID_aes_##ksize##_##lmode, \
547 EVP_CIPHER_block_size_##umode, \
548 AES_KEY_SIZE_##ksize, \
550 0 | EVP_CIPH_##umode##_MODE, \
551 padlock_aes_init_key, \
552 padlock_##lmode##_cipher, \
554 sizeof(struct padlock_cipher_data) + 16, \
555 EVP_CIPHER_set_asn1_iv, \
556 EVP_CIPHER_get_asn1_iv, \
561 DECLARE_AES_EVP(128,ecb,ECB);
562 DECLARE_AES_EVP(128,cbc,CBC);
563 DECLARE_AES_EVP(128,cfb,CFB);
564 DECLARE_AES_EVP(128,ofb,OFB);
565 DECLARE_AES_EVP(128,ctr,CTR);
567 DECLARE_AES_EVP(192,ecb,ECB);
568 DECLARE_AES_EVP(192,cbc,CBC);
569 DECLARE_AES_EVP(192,cfb,CFB);
570 DECLARE_AES_EVP(192,ofb,OFB);
571 DECLARE_AES_EVP(192,ctr,CTR);
573 DECLARE_AES_EVP(256,ecb,ECB);
574 DECLARE_AES_EVP(256,cbc,CBC);
575 DECLARE_AES_EVP(256,cfb,CFB);
576 DECLARE_AES_EVP(256,ofb,OFB);
577 DECLARE_AES_EVP(256,ctr,CTR);
580 padlock_ciphers (ENGINE *e, const EVP_CIPHER **cipher, const int **nids, int nid)
582 /* No specific cipher => return a list of supported nids ... */
584 *nids = padlock_cipher_nids;
585 return padlock_cipher_nids_num;
588 /* ... or the requested "cipher" otherwise */
590 case NID_aes_128_ecb:
591 *cipher = &padlock_aes_128_ecb;
593 case NID_aes_128_cbc:
594 *cipher = &padlock_aes_128_cbc;
596 case NID_aes_128_cfb:
597 *cipher = &padlock_aes_128_cfb;
599 case NID_aes_128_ofb:
600 *cipher = &padlock_aes_128_ofb;
602 case NID_aes_128_ctr:
603 *cipher = &padlock_aes_128_ctr;
606 case NID_aes_192_ecb:
607 *cipher = &padlock_aes_192_ecb;
609 case NID_aes_192_cbc:
610 *cipher = &padlock_aes_192_cbc;
612 case NID_aes_192_cfb:
613 *cipher = &padlock_aes_192_cfb;
615 case NID_aes_192_ofb:
616 *cipher = &padlock_aes_192_ofb;
618 case NID_aes_192_ctr:
619 *cipher = &padlock_aes_192_ctr;
622 case NID_aes_256_ecb:
623 *cipher = &padlock_aes_256_ecb;
625 case NID_aes_256_cbc:
626 *cipher = &padlock_aes_256_cbc;
628 case NID_aes_256_cfb:
629 *cipher = &padlock_aes_256_cfb;
631 case NID_aes_256_ofb:
632 *cipher = &padlock_aes_256_ofb;
634 case NID_aes_256_ctr:
635 *cipher = &padlock_aes_256_ctr;
639 /* Sorry, we don't support this NID */
647 /* Prepare the encryption key for PadLock usage */
649 padlock_aes_init_key (EVP_CIPHER_CTX *ctx, const unsigned char *key,
650 const unsigned char *iv, int enc)
652 struct padlock_cipher_data *cdata;
653 int key_len = EVP_CIPHER_CTX_key_length(ctx) * 8;
654 unsigned long mode = EVP_CIPHER_CTX_mode(ctx);
656 if (key==NULL) return 0; /* ERROR */
658 cdata = ALIGNED_CIPHER_DATA(ctx);
659 memset(cdata, 0, sizeof(struct padlock_cipher_data));
661 /* Prepare Control word. */
662 if (mode == EVP_CIPH_OFB_MODE || mode == EVP_CIPH_CTR_MODE)
663 cdata->cword.b.encdec = 0;
665 cdata->cword.b.encdec = (ctx->encrypt == 0);
666 cdata->cword.b.rounds = 10 + (key_len - 128) / 32;
667 cdata->cword.b.ksize = (key_len - 128) / 64;
671 /* PadLock can generate an extended key for
672 AES128 in hardware */
673 memcpy(cdata->ks.rd_key, key, AES_KEY_SIZE_128);
674 cdata->cword.b.keygen = 0;
679 /* Generate an extended AES key in software.
680 Needed for AES192/AES256 */
681 /* Well, the above applies to Stepping 8 CPUs
682 and is listed as hardware errata. They most
683 likely will fix it at some point and then
684 a check for stepping would be due here. */
685 if ((mode == EVP_CIPH_ECB_MODE ||
686 mode == EVP_CIPH_CBC_MODE)
688 AES_set_decrypt_key(key, key_len, &cdata->ks);
690 AES_set_encrypt_key(key, key_len, &cdata->ks);
692 /* OpenSSL C functions use byte-swapped extended key. */
693 padlock_key_bswap(&cdata->ks);
695 cdata->cword.b.keygen = 1;
704 * This is done to cover for cases when user reuses the
705 * context for new key. The catch is that if we don't do
706 * this, padlock_eas_cipher might proceed with old key...
708 padlock_reload_key ();
713 #endif /* OPENSSL_NO_AES */
715 /* ===== Random Number Generator ===== */
717 * This code is not engaged. The reason is that it does not comply
718 * with recommendations for VIA RNG usage for secure applications
719 * (posted at http://www.via.com.tw/en/viac3/c3.jsp) nor does it
720 * provide meaningful error control...
722 /* Wrapper that provides an interface between the API and
723 the raw PadLock RNG */
725 padlock_rand_bytes(unsigned char *output, int count)
727 unsigned int eax, buf;
730 eax = padlock_xstore(output, 0);
731 if (!(eax&(1<<6))) return 0; /* RNG disabled */
732 /* this ---vv--- covers DC bias, Raw Bits and String Filter */
733 if (eax&(0x1F<<10)) return 0;
734 if ((eax&0x1F)==0) continue; /* no data, retry... */
735 if ((eax&0x1F)!=8) return 0; /* fatal failure... */
740 eax = padlock_xstore(&buf, 3);
741 if (!(eax&(1<<6))) return 0; /* RNG disabled */
742 /* this ---vv--- covers DC bias, Raw Bits and String Filter */
743 if (eax&(0x1F<<10)) return 0;
744 if ((eax&0x1F)==0) continue; /* no data, retry... */
745 if ((eax&0x1F)!=1) return 0; /* fatal failure... */
746 *output++ = (unsigned char)buf;
749 *(volatile unsigned int *)&buf=0;
754 /* Dummy but necessary function */
756 padlock_rand_status(void)
761 /* Prepare structure for registration */
762 static RAND_METHOD padlock_rand = {
764 padlock_rand_bytes, /* bytes */
767 padlock_rand_bytes, /* pseudorand */
768 padlock_rand_status, /* rand status */
771 #else /* !COMPILE_HW_PADLOCK */
772 #ifndef OPENSSL_NO_DYNAMIC_ENGINE
774 int bind_engine(ENGINE *e, const char *id, const dynamic_fns *fns);
776 int bind_engine(ENGINE *e, const char *id, const dynamic_fns *fns) { return 0; }
777 IMPLEMENT_DYNAMIC_CHECK_FN()
779 #endif /* COMPILE_HW_PADLOCK */
781 #endif /* !OPENSSL_NO_HW_PADLOCK */
782 #endif /* !OPENSSL_NO_HW */