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>
64 #include <linux/version.h>
68 #if LINUX_VERSION_CODE <= KERNEL_VERSION(K_MAJ, K_MIN1, K_MIN2)
69 # warning "AFALG ENGINE requires Kernel Headers >= 4.1.0"
70 # warning "Skipping Compilation of AFALG engine"
73 # include <linux/if_alg.h>
74 # include <sys/socket.h>
76 # include <sys/utsname.h>
78 # include <linux/aio_abi.h>
79 # include <sys/syscall.h>
84 # define AFALG_LIB_NAME "AFALG"
85 # include "e_afalg_err.h"
92 # ifndef SPLICE_F_GIFT
93 # define SPLICE_F_GIFT (0x08)
97 # define ALG_AES_IV_LEN 16
98 # define ALG_IV_LEN(len) (sizeof(struct af_alg_iv) + (len))
99 # define ALG_OP_TYPE unsigned int
100 # define ALG_OP_LEN (sizeof(ALG_OP_TYPE))
102 #define ALG_MAX_SALG_NAME 64
103 #define ALG_MAX_SALG_TYPE 14
105 # ifdef OPENSSL_NO_DYNAMIC_ENGINE
106 void engine_load_afalg_internal(void);
109 /* Local Linkage Functions */
110 static int afalg_init_aio(afalg_aio *aio);
111 static int afalg_fin_cipher_aio(afalg_aio *ptr, int sfd,
112 unsigned char *buf, size_t len);
113 static int afalg_create_sk(afalg_ctx *actx, const char *ciphertype,
114 const char *ciphername);
115 static int afalg_destroy(ENGINE *e);
116 static int afalg_init(ENGINE *e);
117 static int afalg_finish(ENGINE *e);
118 const EVP_CIPHER *afalg_aes_128_cbc(void);
119 static int afalg_ciphers(ENGINE *e, const EVP_CIPHER **cipher,
120 const int **nids, int nid);
121 static int afalg_cipher_init(EVP_CIPHER_CTX *ctx, const unsigned char *key,
122 const unsigned char *iv, int enc);
123 static int afalg_do_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
124 const unsigned char *in, size_t inl);
125 static int afalg_cipher_cleanup(EVP_CIPHER_CTX *ctx);
126 static int afalg_chk_platform(void);
128 /* Engine Id and Name */
129 static const char *engine_afalg_id = "afalg";
130 static const char *engine_afalg_name = "AFLAG engine support";
132 int afalg_cipher_nids[] = {
136 static EVP_CIPHER *_hidden_aes_128_cbc = NULL;
138 static inline int io_setup(unsigned n, aio_context_t *ctx)
140 return syscall(__NR_io_setup, n, ctx);
143 static inline int eventfd(int n)
145 return syscall(__NR_eventfd, n);
148 static inline int io_destroy(aio_context_t ctx)
150 return syscall(__NR_io_destroy, ctx);
153 static inline int io_read(aio_context_t ctx, long n, struct iocb **iocb)
155 return syscall(__NR_io_submit, ctx, n, iocb);
158 static inline int io_getevents(aio_context_t ctx, long min, long max,
159 struct io_event *events,
160 struct timespec *timeout)
162 return syscall(__NR_io_getevents, ctx, min, max, events, timeout);
165 static void afalg_waitfd_cleanup(ASYNC_WAIT_CTX *ctx, const void *key,
166 OSSL_ASYNC_FD waitfd, void *custom)
171 static int afalg_setup_async_event_notification(afalg_aio *aio)
174 ASYNC_WAIT_CTX *waitctx;
178 if ((job = ASYNC_get_current_job()) != NULL) {
180 waitctx = ASYNC_get_wait_ctx(job);
181 if (waitctx == NULL) {
182 ALG_WARN("%s: ASYNC_get_wait_ctx error", __func__);
185 /* Get waitfd from ASYNC_WAIT_CTX if it is alreday set */
186 ret = ASYNC_WAIT_CTX_get_fd(waitctx, engine_afalg_id,
190 * waitfd is not set in ASYNC_WAIT_CTX, create a new one
191 * and set it. efd will be signaled when AIO operation completes
193 aio->efd = eventfd(0);
194 if (aio->efd == -1) {
195 ALG_PERR("%s: Failed to get eventfd : ", __func__);
196 AFALGerr(AFALG_F_AFALG_SETUP_ASYNC_EVENT_NOTIFICATION,
197 AFALG_R_EVENTFD_FAILED);
200 ret = ASYNC_WAIT_CTX_set_wait_fd(waitctx, engine_afalg_id,
202 afalg_waitfd_cleanup);
204 ALG_WARN("%s: Failed to set wait fd", __func__);
208 /* make fd non-blocking in async mode */
209 if (fcntl(aio->efd, F_SETFL, O_NONBLOCK) != 0) {
210 ALG_WARN("%s: Failed to set event fd as NONBLOCKING",
214 aio->mode = MODE_ASYNC;
217 aio->efd = eventfd(0);
218 if (aio->efd == -1) {
219 ALG_PERR("%s: Failed to get eventfd : ", __func__);
220 AFALGerr(AFALG_F_AFALG_SETUP_ASYNC_EVENT_NOTIFICATION,
221 AFALG_R_EVENTFD_FAILED);
224 aio->mode = MODE_SYNC;
229 int afalg_init_aio(afalg_aio *aio)
233 /* Initialise for AIO */
235 r = io_setup(MAX_INFLIGHTS, &aio->aio_ctx);
237 ALG_PERR("%s: io_setup error : ", __func__);
238 AFALGerr(AFALG_F_AFALG_INIT_AIO, AFALG_R_IO_SETUP_FAILED);
242 memset(aio->cbt, 0, sizeof(aio->cbt));
244 aio->mode = MODE_UNINIT;
249 int afalg_fin_cipher_aio(afalg_aio *aio, int sfd, unsigned char *buf,
254 unsigned int done = 0;
256 struct timespec timeout;
257 struct io_event events[MAX_INFLIGHTS];
263 /* if efd has not been initialised yet do it here */
264 if (aio->mode == MODE_UNINIT) {
265 r = afalg_setup_async_event_notification(aio);
270 cb = &(aio->cbt[0 % MAX_INFLIGHTS]);
271 memset(cb, '\0', sizeof(*cb));
272 cb->aio_fildes = sfd;
273 cb->aio_lio_opcode = IOCB_CMD_PREAD;
274 cb->aio_buf = (unsigned long)buf;
277 cb->aio_nbytes = len;
278 cb->aio_flags = IOCB_FLAG_RESFD;
279 cb->aio_resfd = aio->efd;
282 * Perform AIO read on AFALG socket, this in turn performs an async
283 * crypto operation in kernel space
285 r = io_read(aio->aio_ctx, 1, &cb);
287 ALG_PWARN("%s: io_read failed : ", __func__);
292 /* While AIO read is being performed pause job */
295 /* Check for completion of AIO read */
296 r = read(aio->efd, &eval, sizeof(eval));
298 if (errno == EAGAIN || errno == EWOULDBLOCK)
300 ALG_PERR("%s: read failed for event fd : ", __func__);
302 } else if (r == 0 || eval <= 0) {
303 ALG_WARN("%s: eventfd read %d bytes, eval = %lu\n", __func__, r,
308 /* Get results of AIO read */
309 r = io_getevents(aio->aio_ctx, 1, MAX_INFLIGHTS,
313 * events.res indicates the actual status of the operation.
314 * Handle the error condition first.
316 if (events[0].res < 0) {
318 * Underlying operation cannot be completed at the time
319 * of previous submission. Resubmit for the operation.
321 if (events[0].res == -EBUSY && retry++ < 3) {
322 r = io_read(aio->aio_ctx, 1, &cb);
324 ALG_PERR("%s: retry %d for io_read failed : ",
331 * Retries exceed for -EBUSY or unrecoverable error
332 * condition for this instance of operation.
335 ("%s: Crypto Operation failed with code %lld\n",
336 __func__, events[0].res);
340 /* Operation successful. */
343 ALG_PERR("%s: io_getevents failed : ", __func__);
346 ALG_WARN("%s: io_geteventd read 0 bytes\n", __func__);
354 static inline void afalg_set_op_sk(struct cmsghdr *cmsg,
355 const unsigned int op)
357 cmsg->cmsg_level = SOL_ALG;
358 cmsg->cmsg_type = ALG_SET_OP;
359 cmsg->cmsg_len = CMSG_LEN(ALG_OP_LEN);
360 *CMSG_DATA(cmsg) = (char)op;
363 static void afalg_set_iv_sk(struct cmsghdr *cmsg, const unsigned char *iv,
364 const unsigned int len)
366 struct af_alg_iv *aiv;
368 cmsg->cmsg_level = SOL_ALG;
369 cmsg->cmsg_type = ALG_SET_IV;
370 cmsg->cmsg_len = CMSG_LEN(ALG_IV_LEN(len));
371 aiv = (struct af_alg_iv *)CMSG_DATA(cmsg);
373 memcpy(aiv->iv, iv, len);
376 static inline int afalg_set_key(afalg_ctx *actx, const unsigned char *key,
380 ret = setsockopt(actx->bfd, SOL_ALG, ALG_SET_KEY, key, klen);
382 ALG_PERR("%s: Failed to set socket option : ", __func__);
383 AFALGerr(AFALG_F_AFALG_SET_KEY, AFALG_R_SOCKET_SET_KEY_FAILED);
390 static int afalg_create_sk(afalg_ctx *actx, const char *ciphertype,
391 const char *ciphername)
393 struct sockaddr_alg sa;
395 actx->bfd = actx->sfd = -1;
398 memset(&sa, 0, sizeof(sa));
399 sa.salg_family = AF_ALG;
400 strncpy((char *) sa.salg_type, ciphertype, ALG_MAX_SALG_TYPE);
401 sa.salg_type[ALG_MAX_SALG_TYPE-1] = '\0';
402 strncpy((char *) sa.salg_name, ciphername, ALG_MAX_SALG_NAME);
403 sa.salg_name[ALG_MAX_SALG_NAME-1] = '\0';
405 actx->bfd = socket(AF_ALG, SOCK_SEQPACKET, 0);
406 if (actx->bfd == -1) {
407 ALG_PERR("%s: Failed to open socket : ", __func__);
408 AFALGerr(AFALG_F_AFALG_CREATE_SK, AFALG_R_SOCKET_CREATE_FAILED);
412 r = bind(actx->bfd, (struct sockaddr *)&sa, sizeof(sa));
414 ALG_PERR("%s: Failed to bind socket : ", __func__);
415 AFALGerr(AFALG_F_AFALG_CREATE_SK, AFALG_R_SOCKET_BIND_FAILED);
419 actx->sfd = accept(actx->bfd, NULL, 0);
421 ALG_PERR("%s: Socket Accept Failed : ", __func__);
422 AFALGerr(AFALG_F_AFALG_CREATE_SK, AFALG_R_SOCKET_ACCEPT_FAILED);
433 actx->bfd = actx->sfd = -1;
437 static int afalg_start_cipher_sk(afalg_ctx *actx, const unsigned char *in,
438 size_t inl, const unsigned char *iv,
441 struct msghdr msg = { 0 };
442 struct cmsghdr *cmsg;
445 # ifdef ALG_ZERO_COPY
449 const ssize_t cbuf_sz = CMSG_SPACE(ALG_IV_LEN(ALG_AES_IV_LEN))
450 + CMSG_SPACE(ALG_OP_LEN);
453 memset(cbuf, 0, cbuf_sz);
454 msg.msg_control = cbuf;
455 msg.msg_controllen = cbuf_sz;
458 * cipher direction (i.e. encrypt or decrypt) and iv are sent to the
459 * kernel as part of sendmsg()'s ancillary data
461 cmsg = CMSG_FIRSTHDR(&msg);
462 afalg_set_op_sk(cmsg, enc);
463 cmsg = CMSG_NXTHDR(&msg, cmsg);
464 afalg_set_iv_sk(cmsg, iv, ALG_AES_IV_LEN);
466 /* iov that describes input data */
467 iov.iov_base = (unsigned char *)in;
470 msg.msg_flags = MSG_MORE;
472 # ifdef ALG_ZERO_COPY
475 * Works best when buffer is 4k aligned
476 * OPENS: out of place processing (i.e. out != in)
479 /* Input data is not sent as part of call to sendmsg() */
483 /* Sendmsg() sends iv and cipher direction to the kernel */
484 sbytes = sendmsg(actx->sfd, &msg, 0);
486 ALG_PERR("%s: sendmsg failed for zero copy cipher operation : ",
492 * vmsplice and splice are used to pin the user space input buffer for
493 * kernel space processing avoiding copys from user to kernel space
495 ret = vmsplice(actx->zc_pipe[1], &iov, 1, SPLICE_F_GIFT);
497 ALG_PERR("%s: vmsplice failed : ", __func__);
501 ret = splice(actx->zc_pipe[0], NULL, actx->sfd, NULL, inl, 0);
503 ALG_PERR("%s: splice failed : ", __func__);
510 /* Sendmsg() sends iv, cipher direction and input data to the kernel */
511 sbytes = sendmsg(actx->sfd, &msg, 0);
513 ALG_PERR("%s: sendmsg failed for cipher operation : ", __func__);
517 if (sbytes != (ssize_t) inl) {
518 ALG_WARN("Cipher operation send bytes %zd != inlen %zd\n", sbytes,
527 static int afalg_cipher_init(EVP_CIPHER_CTX *ctx, const unsigned char *key,
528 const unsigned char *iv, int enc)
533 char ciphername[ALG_MAX_SALG_NAME];
535 if (ctx == NULL || key == NULL) {
536 ALG_WARN("%s: Null Parameter\n", __func__);
540 if (EVP_CIPHER_CTX_cipher(ctx) == NULL) {
541 ALG_WARN("%s: Cipher object NULL\n", __func__);
545 actx = EVP_CIPHER_CTX_cipher_data(ctx);
547 ALG_WARN("%s: Cipher data NULL\n", __func__);
551 ciphertype = EVP_CIPHER_CTX_nid(ctx);
552 switch (ciphertype) {
553 case NID_aes_128_cbc:
554 strncpy(ciphername, "cbc(aes)", ALG_MAX_SALG_NAME);
557 ALG_WARN("%s: Unsupported Cipher type %d\n", __func__, ciphertype);
560 ciphername[ALG_MAX_SALG_NAME-1]='\0';
562 if (ALG_AES_IV_LEN != EVP_CIPHER_CTX_iv_length(ctx)) {
563 ALG_WARN("%s: Unsupported IV length :%d\n", __func__,
564 EVP_CIPHER_CTX_iv_length(ctx));
568 /* Setup AFALG socket for crypto processing */
569 ret = afalg_create_sk(actx, "skcipher", ciphername);
574 ret = afalg_set_key(actx, key, EVP_CIPHER_CTX_key_length(ctx));
578 /* Setup AIO ctx to allow async AFALG crypto processing */
579 if (afalg_init_aio(&actx->aio) == 0)
582 # ifdef ALG_ZERO_COPY
586 actx->init_done = MAGIC_INIT_NUM;
596 static int afalg_do_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
597 const unsigned char *in, size_t inl)
601 char nxtiv[ALG_AES_IV_LEN] = { 0 };
603 if (ctx == NULL || out == NULL || in == NULL) {
604 ALG_WARN("NULL parameter passed to function %s\n", __func__);
608 actx = (afalg_ctx *) EVP_CIPHER_CTX_cipher_data(ctx);
609 if (actx == NULL || actx->init_done != MAGIC_INIT_NUM) {
610 ALG_WARN("%s afalg ctx passed\n",
611 ctx == NULL ? "NULL" : "Uninitialised");
616 * set iv now for decrypt operation as the input buffer can be
617 * overwritten for inplace operation where in = out.
619 if (EVP_CIPHER_CTX_encrypting(ctx) == 0) {
620 memcpy(nxtiv, in + (inl - ALG_AES_IV_LEN), ALG_AES_IV_LEN);
623 /* Send input data to kernel space */
624 ret = afalg_start_cipher_sk(actx, (unsigned char *)in, inl,
625 EVP_CIPHER_CTX_iv(ctx),
626 EVP_CIPHER_CTX_encrypting(ctx));
631 /* Perform async crypto operation in kernel space */
632 ret = afalg_fin_cipher_aio(&actx->aio, actx->sfd, out, inl);
636 if (EVP_CIPHER_CTX_encrypting(ctx)) {
637 memcpy(EVP_CIPHER_CTX_iv_noconst(ctx), out + (inl - ALG_AES_IV_LEN),
640 memcpy(EVP_CIPHER_CTX_iv_noconst(ctx), nxtiv, ALG_AES_IV_LEN);
646 static int afalg_cipher_cleanup(EVP_CIPHER_CTX *ctx)
651 ALG_WARN("NULL parameter passed to function %s\n", __func__);
655 actx = (afalg_ctx *) EVP_CIPHER_CTX_cipher_data(ctx);
656 if (actx == NULL || actx->init_done != MAGIC_INIT_NUM) {
657 ALG_WARN("%s afalg ctx passed\n",
658 ctx == NULL ? "NULL" : "Uninitialised");
664 # ifdef ALG_ZERO_COPY
665 close(actx->zc_pipe[0]);
666 close(actx->zc_pipe[1]);
668 /* close efd in sync mode, async mode is closed in afalg_waitfd_cleanup() */
669 if (actx->aio.mode == MODE_SYNC)
670 close(actx->aio.efd);
671 io_destroy(actx->aio.aio_ctx);
676 const EVP_CIPHER *afalg_aes_128_cbc(void)
678 if (_hidden_aes_128_cbc == NULL
679 && ((_hidden_aes_128_cbc =
680 EVP_CIPHER_meth_new(NID_aes_128_cbc,
682 AES_KEY_SIZE_128)) == NULL
683 || !EVP_CIPHER_meth_set_iv_length(_hidden_aes_128_cbc, AES_IV_LEN)
684 || !EVP_CIPHER_meth_set_flags(_hidden_aes_128_cbc,
686 EVP_CIPH_FLAG_DEFAULT_ASN1)
687 || !EVP_CIPHER_meth_set_init(_hidden_aes_128_cbc,
689 || !EVP_CIPHER_meth_set_do_cipher(_hidden_aes_128_cbc,
691 || !EVP_CIPHER_meth_set_cleanup(_hidden_aes_128_cbc,
692 afalg_cipher_cleanup)
693 || !EVP_CIPHER_meth_set_impl_ctx_size(_hidden_aes_128_cbc,
694 sizeof(afalg_ctx)))) {
695 EVP_CIPHER_meth_free(_hidden_aes_128_cbc);
696 _hidden_aes_128_cbc = NULL;
698 return _hidden_aes_128_cbc;
701 static int afalg_ciphers(ENGINE *e, const EVP_CIPHER **cipher,
702 const int **nids, int nid)
706 if (cipher == NULL) {
707 *nids = afalg_cipher_nids;
708 return (sizeof(afalg_cipher_nids) / sizeof(afalg_cipher_nids[0]));
712 case NID_aes_128_cbc:
713 *cipher = afalg_aes_128_cbc();
723 static int bind_afalg(ENGINE *e)
725 /* Ensure the afalg error handling is set up */
726 ERR_load_AFALG_strings();
728 if (!ENGINE_set_id(e, engine_afalg_id)
729 || !ENGINE_set_name(e, engine_afalg_name)
730 || !ENGINE_set_destroy_function(e, afalg_destroy)
731 || !ENGINE_set_init_function(e, afalg_init)
732 || !ENGINE_set_finish_function(e, afalg_finish)) {
733 AFALGerr(AFALG_F_BIND_AFALG, AFALG_R_INIT_FAILED);
738 * Create _hidden_aes_128_cbc by calling afalg_aes_128_cbc
739 * now, as bind_aflag can only be called by one thread at a
742 if (afalg_aes_128_cbc() == NULL) {
743 AFALGerr(AFALG_F_BIND_AFALG, AFALG_R_INIT_FAILED);
747 if (!ENGINE_set_ciphers(e, afalg_ciphers)) {
748 AFALGerr(AFALG_F_BIND_AFALG, AFALG_R_INIT_FAILED);
755 # ifndef OPENSSL_NO_DYNAMIC_ENGINE
756 static int bind_helper(ENGINE *e, const char *id)
758 if (id && (strcmp(id, engine_afalg_id) != 0))
761 if (!afalg_chk_platform())
769 IMPLEMENT_DYNAMIC_CHECK_FN()
770 IMPLEMENT_DYNAMIC_BIND_FN(bind_helper)
773 static int afalg_chk_platform(void)
777 int kver[3] = { -1, -1, -1 };
783 AFALGerr(AFALG_F_AFALG_CHK_PLATFORM,
784 AFALG_R_FAILED_TO_GET_PLATFORM_INFO);
788 str = strtok(ut.release, ".");
789 for (i = 0; i < 3 && str != NULL; i++) {
791 str = strtok(NULL, ".");
794 if (KERNEL_VERSION(kver[0], kver[1], kver[2])
795 < KERNEL_VERSION(K_MAJ, K_MIN1, K_MIN2)) {
796 ALG_ERR("ASYNC AFALG not supported this kernel(%d.%d.%d)\n",
797 kver[0], kver[1], kver[2]);
798 ALG_ERR("ASYNC AFALG requires kernel version %d.%d.%d or later\n",
799 K_MAJ, K_MIN1, K_MIN2);
800 AFALGerr(AFALG_F_AFALG_CHK_PLATFORM,
801 AFALG_R_KERNEL_DOES_NOT_SUPPORT_ASYNC_AFALG);
808 # ifdef OPENSSL_NO_DYNAMIC_ENGINE
809 static ENGINE *engine_afalg(void)
811 ENGINE *ret = ENGINE_new();
814 if (!bind_afalg(ret)) {
821 void engine_load_afalg_internal(void)
825 if (!afalg_chk_platform())
828 toadd = engine_afalg();
837 static int afalg_init(ENGINE *e)
842 static int afalg_finish(ENGINE *e)
847 static int afalg_destroy(ENGINE *e)
849 ERR_unload_AFALG_strings();
853 #endif /* KERNEL VERSION */