1 /* ====================================================================
2 * Copyright (c) 1999-2016 The OpenSSL Project. All rights reserved.
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
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
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/)"
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 * openssl-core@OpenSSL.org.
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.
30 * 6. Redistributions of any form whatsoever must retain the following
32 * "This product includes software developed by the OpenSSL Project
33 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
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 * ====================================================================
49 * This product includes cryptographic software written by Eric Young
50 * (eay@cryptsoft.com). This product includes software written by Tim
51 * Hudson (tjh@cryptsoft.com).
55 /* Required for vmsplice */
61 #include <openssl/engine.h>
62 #include <openssl/async.h>
63 #include <openssl/err.h>
65 #include <linux/version.h>
69 #if LINUX_VERSION_CODE <= KERNEL_VERSION(K_MAJ, K_MIN1, K_MIN2)
70 # warning "AFALG ENGINE requires Kernel Headers >= 4.1.0"
71 # warning "Skipping Compilation of AFALG engine"
74 # include <linux/if_alg.h>
75 # include <sys/socket.h>
77 # include <sys/utsname.h>
79 # include <linux/aio_abi.h>
80 # include <sys/syscall.h>
85 # define AFALG_LIB_NAME "AFALG"
86 # include "e_afalg_err.h"
93 # ifndef SPLICE_F_GIFT
94 # define SPLICE_F_GIFT (0x08)
98 # define ALG_AES_IV_LEN 16
99 # define ALG_IV_LEN(len) (sizeof(struct af_alg_iv) + (len))
100 # define ALG_OP_TYPE unsigned int
101 # define ALG_OP_LEN (sizeof(ALG_OP_TYPE))
103 #define ALG_MAX_SALG_NAME 64
104 #define ALG_MAX_SALG_TYPE 14
106 # ifdef OPENSSL_NO_DYNAMIC_ENGINE
107 void engine_load_afalg_internal(void);
110 /* Local Linkage Functions */
111 static int afalg_init_aio(afalg_aio *aio);
112 static int afalg_fin_cipher_aio(afalg_aio *ptr, int sfd,
113 unsigned char *buf, size_t len);
114 static int afalg_create_sk(afalg_ctx *actx, const char *ciphertype,
115 const char *ciphername);
116 static int afalg_destroy(ENGINE *e);
117 static int afalg_init(ENGINE *e);
118 static int afalg_finish(ENGINE *e);
119 const EVP_CIPHER *afalg_aes_128_cbc(void);
120 static int afalg_ciphers(ENGINE *e, const EVP_CIPHER **cipher,
121 const int **nids, int nid);
122 static int afalg_cipher_init(EVP_CIPHER_CTX *ctx, const unsigned char *key,
123 const unsigned char *iv, int enc);
124 static int afalg_do_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
125 const unsigned char *in, size_t inl);
126 static int afalg_cipher_cleanup(EVP_CIPHER_CTX *ctx);
127 static int afalg_chk_platform(void);
129 /* Engine Id and Name */
130 static const char *engine_afalg_id = "afalg";
131 static const char *engine_afalg_name = "AFLAG engine support";
133 static int afalg_cipher_nids[] = {
137 static EVP_CIPHER *_hidden_aes_128_cbc = NULL;
139 static inline int io_setup(unsigned n, aio_context_t *ctx)
141 return syscall(__NR_io_setup, n, ctx);
144 static inline int eventfd(int n)
146 return syscall(__NR_eventfd, n);
149 static inline int io_destroy(aio_context_t ctx)
151 return syscall(__NR_io_destroy, ctx);
154 static inline int io_read(aio_context_t ctx, long n, struct iocb **iocb)
156 return syscall(__NR_io_submit, ctx, n, iocb);
159 static inline int io_getevents(aio_context_t ctx, long min, long max,
160 struct io_event *events,
161 struct timespec *timeout)
163 return syscall(__NR_io_getevents, ctx, min, max, events, timeout);
166 static void afalg_waitfd_cleanup(ASYNC_WAIT_CTX *ctx, const void *key,
167 OSSL_ASYNC_FD waitfd, void *custom)
172 static int afalg_setup_async_event_notification(afalg_aio *aio)
175 ASYNC_WAIT_CTX *waitctx;
179 if ((job = ASYNC_get_current_job()) != NULL) {
181 waitctx = ASYNC_get_wait_ctx(job);
182 if (waitctx == NULL) {
183 ALG_WARN("%s: ASYNC_get_wait_ctx error", __func__);
186 /* Get waitfd from ASYNC_WAIT_CTX if it is alreday set */
187 ret = ASYNC_WAIT_CTX_get_fd(waitctx, engine_afalg_id,
191 * waitfd is not set in ASYNC_WAIT_CTX, create a new one
192 * and set it. efd will be signaled when AIO operation completes
194 aio->efd = eventfd(0);
195 if (aio->efd == -1) {
196 ALG_PERR("%s: Failed to get eventfd : ", __func__);
197 AFALGerr(AFALG_F_AFALG_SETUP_ASYNC_EVENT_NOTIFICATION,
198 AFALG_R_EVENTFD_FAILED);
201 ret = ASYNC_WAIT_CTX_set_wait_fd(waitctx, engine_afalg_id,
203 afalg_waitfd_cleanup);
205 ALG_WARN("%s: Failed to set wait fd", __func__);
209 /* make fd non-blocking in async mode */
210 if (fcntl(aio->efd, F_SETFL, O_NONBLOCK) != 0) {
211 ALG_WARN("%s: Failed to set event fd as NONBLOCKING",
215 aio->mode = MODE_ASYNC;
218 aio->efd = eventfd(0);
219 if (aio->efd == -1) {
220 ALG_PERR("%s: Failed to get eventfd : ", __func__);
221 AFALGerr(AFALG_F_AFALG_SETUP_ASYNC_EVENT_NOTIFICATION,
222 AFALG_R_EVENTFD_FAILED);
225 aio->mode = MODE_SYNC;
230 int afalg_init_aio(afalg_aio *aio)
234 /* Initialise for AIO */
236 r = io_setup(MAX_INFLIGHTS, &aio->aio_ctx);
238 ALG_PERR("%s: io_setup error : ", __func__);
239 AFALGerr(AFALG_F_AFALG_INIT_AIO, AFALG_R_IO_SETUP_FAILED);
243 memset(aio->cbt, 0, sizeof(aio->cbt));
245 aio->mode = MODE_UNINIT;
250 int afalg_fin_cipher_aio(afalg_aio *aio, int sfd, unsigned char *buf,
255 unsigned int done = 0;
257 struct timespec timeout;
258 struct io_event events[MAX_INFLIGHTS];
264 /* if efd has not been initialised yet do it here */
265 if (aio->mode == MODE_UNINIT) {
266 r = afalg_setup_async_event_notification(aio);
271 cb = &(aio->cbt[0 % MAX_INFLIGHTS]);
272 memset(cb, '\0', sizeof(*cb));
273 cb->aio_fildes = sfd;
274 cb->aio_lio_opcode = IOCB_CMD_PREAD;
275 cb->aio_buf = (unsigned long)buf;
278 cb->aio_nbytes = len;
279 cb->aio_flags = IOCB_FLAG_RESFD;
280 cb->aio_resfd = aio->efd;
283 * Perform AIO read on AFALG socket, this in turn performs an async
284 * crypto operation in kernel space
286 r = io_read(aio->aio_ctx, 1, &cb);
288 ALG_PWARN("%s: io_read failed : ", __func__);
293 /* While AIO read is being performed pause job */
296 /* Check for completion of AIO read */
297 r = read(aio->efd, &eval, sizeof(eval));
299 if (errno == EAGAIN || errno == EWOULDBLOCK)
301 ALG_PERR("%s: read failed for event fd : ", __func__);
303 } else if (r == 0 || eval <= 0) {
304 ALG_WARN("%s: eventfd read %d bytes, eval = %lu\n", __func__, r,
309 /* Get results of AIO read */
310 r = io_getevents(aio->aio_ctx, 1, MAX_INFLIGHTS,
314 * events.res indicates the actual status of the operation.
315 * Handle the error condition first.
317 if (events[0].res < 0) {
319 * Underlying operation cannot be completed at the time
320 * of previous submission. Resubmit for the operation.
322 if (events[0].res == -EBUSY && retry++ < 3) {
323 r = io_read(aio->aio_ctx, 1, &cb);
325 ALG_PERR("%s: retry %d for io_read failed : ",
332 * Retries exceed for -EBUSY or unrecoverable error
333 * condition for this instance of operation.
336 ("%s: Crypto Operation failed with code %lld\n",
337 __func__, events[0].res);
341 /* Operation successful. */
344 ALG_PERR("%s: io_getevents failed : ", __func__);
347 ALG_WARN("%s: io_geteventd read 0 bytes\n", __func__);
355 static inline void afalg_set_op_sk(struct cmsghdr *cmsg,
356 const unsigned int op)
358 cmsg->cmsg_level = SOL_ALG;
359 cmsg->cmsg_type = ALG_SET_OP;
360 cmsg->cmsg_len = CMSG_LEN(ALG_OP_LEN);
361 *CMSG_DATA(cmsg) = (char)op;
364 static void afalg_set_iv_sk(struct cmsghdr *cmsg, const unsigned char *iv,
365 const unsigned int len)
367 struct af_alg_iv *aiv;
369 cmsg->cmsg_level = SOL_ALG;
370 cmsg->cmsg_type = ALG_SET_IV;
371 cmsg->cmsg_len = CMSG_LEN(ALG_IV_LEN(len));
372 aiv = (struct af_alg_iv *)CMSG_DATA(cmsg);
374 memcpy(aiv->iv, iv, len);
377 static inline int afalg_set_key(afalg_ctx *actx, const unsigned char *key,
381 ret = setsockopt(actx->bfd, SOL_ALG, ALG_SET_KEY, key, klen);
383 ALG_PERR("%s: Failed to set socket option : ", __func__);
384 AFALGerr(AFALG_F_AFALG_SET_KEY, AFALG_R_SOCKET_SET_KEY_FAILED);
391 static int afalg_create_sk(afalg_ctx *actx, const char *ciphertype,
392 const char *ciphername)
394 struct sockaddr_alg sa;
396 actx->bfd = actx->sfd = -1;
399 memset(&sa, 0, sizeof(sa));
400 sa.salg_family = AF_ALG;
401 strncpy((char *) sa.salg_type, ciphertype, ALG_MAX_SALG_TYPE);
402 sa.salg_type[ALG_MAX_SALG_TYPE-1] = '\0';
403 strncpy((char *) sa.salg_name, ciphername, ALG_MAX_SALG_NAME);
404 sa.salg_name[ALG_MAX_SALG_NAME-1] = '\0';
406 actx->bfd = socket(AF_ALG, SOCK_SEQPACKET, 0);
407 if (actx->bfd == -1) {
408 ALG_PERR("%s: Failed to open socket : ", __func__);
409 AFALGerr(AFALG_F_AFALG_CREATE_SK, AFALG_R_SOCKET_CREATE_FAILED);
413 r = bind(actx->bfd, (struct sockaddr *)&sa, sizeof(sa));
415 ALG_PERR("%s: Failed to bind socket : ", __func__);
416 AFALGerr(AFALG_F_AFALG_CREATE_SK, AFALG_R_SOCKET_BIND_FAILED);
420 actx->sfd = accept(actx->bfd, NULL, 0);
422 ALG_PERR("%s: Socket Accept Failed : ", __func__);
423 AFALGerr(AFALG_F_AFALG_CREATE_SK, AFALG_R_SOCKET_ACCEPT_FAILED);
434 actx->bfd = actx->sfd = -1;
438 static int afalg_start_cipher_sk(afalg_ctx *actx, const unsigned char *in,
439 size_t inl, const unsigned char *iv,
442 struct msghdr msg = { 0 };
443 struct cmsghdr *cmsg;
446 # ifdef ALG_ZERO_COPY
449 char cbuf[CMSG_SPACE(ALG_IV_LEN(ALG_AES_IV_LEN)) + CMSG_SPACE(ALG_OP_LEN)];
451 memset(cbuf, 0, sizeof(cbuf));
452 msg.msg_control = cbuf;
453 msg.msg_controllen = sizeof(cbuf);
456 * cipher direction (i.e. encrypt or decrypt) and iv are sent to the
457 * kernel as part of sendmsg()'s ancillary data
459 cmsg = CMSG_FIRSTHDR(&msg);
460 afalg_set_op_sk(cmsg, enc);
461 cmsg = CMSG_NXTHDR(&msg, cmsg);
462 afalg_set_iv_sk(cmsg, iv, ALG_AES_IV_LEN);
464 /* iov that describes input data */
465 iov.iov_base = (unsigned char *)in;
468 msg.msg_flags = MSG_MORE;
470 # ifdef ALG_ZERO_COPY
473 * Works best when buffer is 4k aligned
474 * OPENS: out of place processing (i.e. out != in)
477 /* Input data is not sent as part of call to sendmsg() */
481 /* Sendmsg() sends iv and cipher direction to the kernel */
482 sbytes = sendmsg(actx->sfd, &msg, 0);
484 ALG_PERR("%s: sendmsg failed for zero copy cipher operation : ",
490 * vmsplice and splice are used to pin the user space input buffer for
491 * kernel space processing avoiding copys from user to kernel space
493 ret = vmsplice(actx->zc_pipe[1], &iov, 1, SPLICE_F_GIFT);
495 ALG_PERR("%s: vmsplice failed : ", __func__);
499 ret = splice(actx->zc_pipe[0], NULL, actx->sfd, NULL, inl, 0);
501 ALG_PERR("%s: splice failed : ", __func__);
508 /* Sendmsg() sends iv, cipher direction and input data to the kernel */
509 sbytes = sendmsg(actx->sfd, &msg, 0);
511 ALG_PERR("%s: sendmsg failed for cipher operation : ", __func__);
515 if (sbytes != (ssize_t) inl) {
516 ALG_WARN("Cipher operation send bytes %zd != inlen %zd\n", sbytes,
525 static int afalg_cipher_init(EVP_CIPHER_CTX *ctx, const unsigned char *key,
526 const unsigned char *iv, int enc)
531 char ciphername[ALG_MAX_SALG_NAME];
533 if (ctx == NULL || key == NULL) {
534 ALG_WARN("%s: Null Parameter\n", __func__);
538 if (EVP_CIPHER_CTX_cipher(ctx) == NULL) {
539 ALG_WARN("%s: Cipher object NULL\n", __func__);
543 actx = EVP_CIPHER_CTX_get_cipher_data(ctx);
545 ALG_WARN("%s: Cipher data NULL\n", __func__);
549 ciphertype = EVP_CIPHER_CTX_nid(ctx);
550 switch (ciphertype) {
551 case NID_aes_128_cbc:
552 strncpy(ciphername, "cbc(aes)", ALG_MAX_SALG_NAME);
555 ALG_WARN("%s: Unsupported Cipher type %d\n", __func__, ciphertype);
558 ciphername[ALG_MAX_SALG_NAME-1]='\0';
560 if (ALG_AES_IV_LEN != EVP_CIPHER_CTX_iv_length(ctx)) {
561 ALG_WARN("%s: Unsupported IV length :%d\n", __func__,
562 EVP_CIPHER_CTX_iv_length(ctx));
566 /* Setup AFALG socket for crypto processing */
567 ret = afalg_create_sk(actx, "skcipher", ciphername);
572 ret = afalg_set_key(actx, key, EVP_CIPHER_CTX_key_length(ctx));
576 /* Setup AIO ctx to allow async AFALG crypto processing */
577 if (afalg_init_aio(&actx->aio) == 0)
580 # ifdef ALG_ZERO_COPY
584 actx->init_done = MAGIC_INIT_NUM;
594 static int afalg_do_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
595 const unsigned char *in, size_t inl)
599 char nxtiv[ALG_AES_IV_LEN] = { 0 };
601 if (ctx == NULL || out == NULL || in == NULL) {
602 ALG_WARN("NULL parameter passed to function %s\n", __func__);
606 actx = (afalg_ctx *) EVP_CIPHER_CTX_get_cipher_data(ctx);
607 if (actx == NULL || actx->init_done != MAGIC_INIT_NUM) {
608 ALG_WARN("%s afalg ctx passed\n",
609 ctx == NULL ? "NULL" : "Uninitialised");
614 * set iv now for decrypt operation as the input buffer can be
615 * overwritten for inplace operation where in = out.
617 if (EVP_CIPHER_CTX_encrypting(ctx) == 0) {
618 memcpy(nxtiv, in + (inl - ALG_AES_IV_LEN), ALG_AES_IV_LEN);
621 /* Send input data to kernel space */
622 ret = afalg_start_cipher_sk(actx, (unsigned char *)in, inl,
623 EVP_CIPHER_CTX_iv(ctx),
624 EVP_CIPHER_CTX_encrypting(ctx));
629 /* Perform async crypto operation in kernel space */
630 ret = afalg_fin_cipher_aio(&actx->aio, actx->sfd, out, inl);
634 if (EVP_CIPHER_CTX_encrypting(ctx)) {
635 memcpy(EVP_CIPHER_CTX_iv_noconst(ctx), out + (inl - ALG_AES_IV_LEN),
638 memcpy(EVP_CIPHER_CTX_iv_noconst(ctx), nxtiv, ALG_AES_IV_LEN);
644 static int afalg_cipher_cleanup(EVP_CIPHER_CTX *ctx)
649 ALG_WARN("NULL parameter passed to function %s\n", __func__);
653 actx = (afalg_ctx *) EVP_CIPHER_CTX_get_cipher_data(ctx);
654 if (actx == NULL || actx->init_done != MAGIC_INIT_NUM) {
655 ALG_WARN("%s afalg ctx passed\n",
656 ctx == NULL ? "NULL" : "Uninitialised");
662 # ifdef ALG_ZERO_COPY
663 close(actx->zc_pipe[0]);
664 close(actx->zc_pipe[1]);
666 /* close efd in sync mode, async mode is closed in afalg_waitfd_cleanup() */
667 if (actx->aio.mode == MODE_SYNC)
668 close(actx->aio.efd);
669 io_destroy(actx->aio.aio_ctx);
674 const EVP_CIPHER *afalg_aes_128_cbc(void)
676 if (_hidden_aes_128_cbc == NULL
677 && ((_hidden_aes_128_cbc =
678 EVP_CIPHER_meth_new(NID_aes_128_cbc,
680 AES_KEY_SIZE_128)) == NULL
681 || !EVP_CIPHER_meth_set_iv_length(_hidden_aes_128_cbc, AES_IV_LEN)
682 || !EVP_CIPHER_meth_set_flags(_hidden_aes_128_cbc,
684 EVP_CIPH_FLAG_DEFAULT_ASN1)
685 || !EVP_CIPHER_meth_set_init(_hidden_aes_128_cbc,
687 || !EVP_CIPHER_meth_set_do_cipher(_hidden_aes_128_cbc,
689 || !EVP_CIPHER_meth_set_cleanup(_hidden_aes_128_cbc,
690 afalg_cipher_cleanup)
691 || !EVP_CIPHER_meth_set_impl_ctx_size(_hidden_aes_128_cbc,
692 sizeof(afalg_ctx)))) {
693 EVP_CIPHER_meth_free(_hidden_aes_128_cbc);
694 _hidden_aes_128_cbc = NULL;
696 return _hidden_aes_128_cbc;
699 static int afalg_ciphers(ENGINE *e, const EVP_CIPHER **cipher,
700 const int **nids, int nid)
704 if (cipher == NULL) {
705 *nids = afalg_cipher_nids;
706 return (sizeof(afalg_cipher_nids) / sizeof(afalg_cipher_nids[0]));
710 case NID_aes_128_cbc:
711 *cipher = afalg_aes_128_cbc();
721 static int bind_afalg(ENGINE *e)
723 /* Ensure the afalg error handling is set up */
724 ERR_load_AFALG_strings();
726 if (!ENGINE_set_id(e, engine_afalg_id)
727 || !ENGINE_set_name(e, engine_afalg_name)
728 || !ENGINE_set_destroy_function(e, afalg_destroy)
729 || !ENGINE_set_init_function(e, afalg_init)
730 || !ENGINE_set_finish_function(e, afalg_finish)) {
731 AFALGerr(AFALG_F_BIND_AFALG, AFALG_R_INIT_FAILED);
736 * Create _hidden_aes_128_cbc by calling afalg_aes_128_cbc
737 * now, as bind_aflag can only be called by one thread at a
740 if (afalg_aes_128_cbc() == NULL) {
741 AFALGerr(AFALG_F_BIND_AFALG, AFALG_R_INIT_FAILED);
745 if (!ENGINE_set_ciphers(e, afalg_ciphers)) {
746 AFALGerr(AFALG_F_BIND_AFALG, AFALG_R_INIT_FAILED);
753 # ifndef OPENSSL_NO_DYNAMIC_ENGINE
754 static int bind_helper(ENGINE *e, const char *id)
756 if (id && (strcmp(id, engine_afalg_id) != 0))
759 if (!afalg_chk_platform())
767 IMPLEMENT_DYNAMIC_CHECK_FN()
768 IMPLEMENT_DYNAMIC_BIND_FN(bind_helper)
771 static int afalg_chk_platform(void)
775 int kver[3] = { -1, -1, -1 };
781 AFALGerr(AFALG_F_AFALG_CHK_PLATFORM,
782 AFALG_R_FAILED_TO_GET_PLATFORM_INFO);
786 str = strtok(ut.release, ".");
787 for (i = 0; i < 3 && str != NULL; i++) {
789 str = strtok(NULL, ".");
792 if (KERNEL_VERSION(kver[0], kver[1], kver[2])
793 < KERNEL_VERSION(K_MAJ, K_MIN1, K_MIN2)) {
794 ALG_ERR("ASYNC AFALG not supported this kernel(%d.%d.%d)\n",
795 kver[0], kver[1], kver[2]);
796 ALG_ERR("ASYNC AFALG requires kernel version %d.%d.%d or later\n",
797 K_MAJ, K_MIN1, K_MIN2);
798 AFALGerr(AFALG_F_AFALG_CHK_PLATFORM,
799 AFALG_R_KERNEL_DOES_NOT_SUPPORT_ASYNC_AFALG);
806 # ifdef OPENSSL_NO_DYNAMIC_ENGINE
807 static ENGINE *engine_afalg(void)
809 ENGINE *ret = ENGINE_new();
812 if (!bind_afalg(ret)) {
819 void engine_load_afalg_internal(void)
823 if (!afalg_chk_platform())
826 toadd = engine_afalg();
835 static int afalg_init(ENGINE *e)
840 static int afalg_finish(ENGINE *e)
845 static int afalg_destroy(ENGINE *e)
847 ERR_unload_AFALG_strings();
848 EVP_CIPHER_meth_free(_hidden_aes_128_cbc);
849 _hidden_aes_128_cbc = NULL;
853 #endif /* KERNEL VERSION */