2 * Copyright 2016 The OpenSSL Project Authors. All Rights Reserved.
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
10 /* Required for vmsplice */
18 #include <openssl/engine.h>
19 #include <openssl/async.h>
20 #include <openssl/err.h>
21 #include "internal/nelem.h"
23 #include <sys/socket.h>
24 #include <linux/version.h>
28 #if LINUX_VERSION_CODE < KERNEL_VERSION(K_MAJ, K_MIN1, K_MIN2) || \
31 # warning "AFALG ENGINE requires Kernel Headers >= 4.1.0"
32 # warning "Skipping Compilation of AFALG engine"
34 void engine_load_afalg_int(void);
35 void engine_load_afalg_int(void)
40 # include <linux/if_alg.h>
42 # include <sys/utsname.h>
44 # include <linux/aio_abi.h>
45 # include <sys/syscall.h>
49 # include "e_afalg_err.c"
56 # ifndef SPLICE_F_GIFT
57 # define SPLICE_F_GIFT (0x08)
61 # define ALG_AES_IV_LEN 16
62 # define ALG_IV_LEN(len) (sizeof(struct af_alg_iv) + (len))
63 # define ALG_OP_TYPE unsigned int
64 # define ALG_OP_LEN (sizeof(ALG_OP_TYPE))
66 #define ALG_MAX_SALG_NAME 64
67 #define ALG_MAX_SALG_TYPE 14
69 # ifdef OPENSSL_NO_DYNAMIC_ENGINE
70 void engine_load_afalg_int(void);
73 /* Local Linkage Functions */
74 static int afalg_init_aio(afalg_aio
*aio
);
75 static int afalg_fin_cipher_aio(afalg_aio
*ptr
, int sfd
,
76 unsigned char *buf
, size_t len
);
77 static int afalg_create_sk(afalg_ctx
*actx
, const char *ciphertype
,
78 const char *ciphername
);
79 static int afalg_destroy(ENGINE
*e
);
80 static int afalg_init(ENGINE
*e
);
81 static int afalg_finish(ENGINE
*e
);
82 static const EVP_CIPHER
*afalg_aes_cbc(int nid
);
83 static cbc_handles
*get_cipher_handle(int nid
);
84 static int afalg_ciphers(ENGINE
*e
, const EVP_CIPHER
**cipher
,
85 const int **nids
, int nid
);
86 static int afalg_cipher_init(EVP_CIPHER_CTX
*ctx
, const unsigned char *key
,
87 const unsigned char *iv
, int enc
);
88 static int afalg_do_cipher(EVP_CIPHER_CTX
*ctx
, unsigned char *out
,
89 const unsigned char *in
, size_t inl
);
90 static int afalg_cipher_cleanup(EVP_CIPHER_CTX
*ctx
);
91 static int afalg_chk_platform(void);
93 /* Engine Id and Name */
94 static const char *engine_afalg_id
= "afalg";
95 static const char *engine_afalg_name
= "AFALG engine support";
97 static int afalg_cipher_nids
[] = {
103 static cbc_handles cbc_handle
[] = {{AES_KEY_SIZE_128
, NULL
},
104 {AES_KEY_SIZE_192
, NULL
},
105 {AES_KEY_SIZE_256
, NULL
}};
107 static ossl_inline
int io_setup(unsigned n
, aio_context_t
*ctx
)
109 return syscall(__NR_io_setup
, n
, ctx
);
112 static ossl_inline
int eventfd(int n
)
114 return syscall(__NR_eventfd2
, n
, 0);
117 static ossl_inline
int io_destroy(aio_context_t ctx
)
119 return syscall(__NR_io_destroy
, ctx
);
122 static ossl_inline
int io_read(aio_context_t ctx
, long n
, struct iocb
**iocb
)
124 return syscall(__NR_io_submit
, ctx
, n
, iocb
);
127 static ossl_inline
int io_getevents(aio_context_t ctx
, long min
, long max
,
128 struct io_event
*events
,
129 struct timespec
*timeout
)
131 return syscall(__NR_io_getevents
, ctx
, min
, max
, events
, timeout
);
134 static void afalg_waitfd_cleanup(ASYNC_WAIT_CTX
*ctx
, const void *key
,
135 OSSL_ASYNC_FD waitfd
, void *custom
)
140 static int afalg_setup_async_event_notification(afalg_aio
*aio
)
143 ASYNC_WAIT_CTX
*waitctx
;
147 if ((job
= ASYNC_get_current_job()) != NULL
) {
149 waitctx
= ASYNC_get_wait_ctx(job
);
150 if (waitctx
== NULL
) {
151 ALG_WARN("%s: ASYNC_get_wait_ctx error", __func__
);
154 /* Get waitfd from ASYNC_WAIT_CTX if it is already set */
155 ret
= ASYNC_WAIT_CTX_get_fd(waitctx
, engine_afalg_id
,
159 * waitfd is not set in ASYNC_WAIT_CTX, create a new one
160 * and set it. efd will be signaled when AIO operation completes
162 aio
->efd
= eventfd(0);
163 if (aio
->efd
== -1) {
164 ALG_PERR("%s: Failed to get eventfd : ", __func__
);
165 AFALGerr(AFALG_F_AFALG_SETUP_ASYNC_EVENT_NOTIFICATION
,
166 AFALG_R_EVENTFD_FAILED
);
169 ret
= ASYNC_WAIT_CTX_set_wait_fd(waitctx
, engine_afalg_id
,
171 afalg_waitfd_cleanup
);
173 ALG_WARN("%s: Failed to set wait fd", __func__
);
177 /* make fd non-blocking in async mode */
178 if (fcntl(aio
->efd
, F_SETFL
, O_NONBLOCK
) != 0) {
179 ALG_WARN("%s: Failed to set event fd as NONBLOCKING",
183 aio
->mode
= MODE_ASYNC
;
186 aio
->efd
= eventfd(0);
187 if (aio
->efd
== -1) {
188 ALG_PERR("%s: Failed to get eventfd : ", __func__
);
189 AFALGerr(AFALG_F_AFALG_SETUP_ASYNC_EVENT_NOTIFICATION
,
190 AFALG_R_EVENTFD_FAILED
);
193 aio
->mode
= MODE_SYNC
;
198 static int afalg_init_aio(afalg_aio
*aio
)
202 /* Initialise for AIO */
204 r
= io_setup(MAX_INFLIGHTS
, &aio
->aio_ctx
);
206 ALG_PERR("%s: io_setup error : ", __func__
);
207 AFALGerr(AFALG_F_AFALG_INIT_AIO
, AFALG_R_IO_SETUP_FAILED
);
211 memset(aio
->cbt
, 0, sizeof(aio
->cbt
));
213 aio
->mode
= MODE_UNINIT
;
218 static int afalg_fin_cipher_aio(afalg_aio
*aio
, int sfd
, unsigned char *buf
,
223 unsigned int done
= 0;
225 struct timespec timeout
;
226 struct io_event events
[MAX_INFLIGHTS
];
232 /* if efd has not been initialised yet do it here */
233 if (aio
->mode
== MODE_UNINIT
) {
234 r
= afalg_setup_async_event_notification(aio
);
239 cb
= &(aio
->cbt
[0 % MAX_INFLIGHTS
]);
240 memset(cb
, '\0', sizeof(*cb
));
241 cb
->aio_fildes
= sfd
;
242 cb
->aio_lio_opcode
= IOCB_CMD_PREAD
;
244 * The pointer has to be converted to unsigned value first to avoid
245 * sign extension on cast to 64 bit value in 32-bit builds
247 cb
->aio_buf
= (size_t)buf
;
250 cb
->aio_nbytes
= len
;
251 cb
->aio_flags
= IOCB_FLAG_RESFD
;
252 cb
->aio_resfd
= aio
->efd
;
255 * Perform AIO read on AFALG socket, this in turn performs an async
256 * crypto operation in kernel space
258 r
= io_read(aio
->aio_ctx
, 1, &cb
);
260 ALG_PWARN("%s: io_read failed : ", __func__
);
265 /* While AIO read is being performed pause job */
268 /* Check for completion of AIO read */
269 r
= read(aio
->efd
, &eval
, sizeof(eval
));
271 if (errno
== EAGAIN
|| errno
== EWOULDBLOCK
)
273 ALG_PERR("%s: read failed for event fd : ", __func__
);
275 } else if (r
== 0 || eval
<= 0) {
276 ALG_WARN("%s: eventfd read %d bytes, eval = %lu\n", __func__
, r
,
281 /* Get results of AIO read */
282 r
= io_getevents(aio
->aio_ctx
, 1, MAX_INFLIGHTS
,
286 * events.res indicates the actual status of the operation.
287 * Handle the error condition first.
289 if (events
[0].res
< 0) {
291 * Underlying operation cannot be completed at the time
292 * of previous submission. Resubmit for the operation.
294 if (events
[0].res
== -EBUSY
&& retry
++ < 3) {
295 r
= io_read(aio
->aio_ctx
, 1, &cb
);
297 ALG_PERR("%s: retry %d for io_read failed : ",
304 * Retries exceed for -EBUSY or unrecoverable error
305 * condition for this instance of operation.
308 ("%s: Crypto Operation failed with code %lld\n",
309 __func__
, events
[0].res
);
313 /* Operation successful. */
316 ALG_PERR("%s: io_getevents failed : ", __func__
);
319 ALG_WARN("%s: io_geteventd read 0 bytes\n", __func__
);
327 static ossl_inline
void afalg_set_op_sk(struct cmsghdr
*cmsg
,
328 const ALG_OP_TYPE op
)
330 cmsg
->cmsg_level
= SOL_ALG
;
331 cmsg
->cmsg_type
= ALG_SET_OP
;
332 cmsg
->cmsg_len
= CMSG_LEN(ALG_OP_LEN
);
333 memcpy(CMSG_DATA(cmsg
), &op
, ALG_OP_LEN
);
336 static void afalg_set_iv_sk(struct cmsghdr
*cmsg
, const unsigned char *iv
,
337 const unsigned int len
)
339 struct af_alg_iv
*aiv
;
341 cmsg
->cmsg_level
= SOL_ALG
;
342 cmsg
->cmsg_type
= ALG_SET_IV
;
343 cmsg
->cmsg_len
= CMSG_LEN(ALG_IV_LEN(len
));
344 aiv
= (struct af_alg_iv
*)CMSG_DATA(cmsg
);
346 memcpy(aiv
->iv
, iv
, len
);
349 static ossl_inline
int afalg_set_key(afalg_ctx
*actx
, const unsigned char *key
,
353 ret
= setsockopt(actx
->bfd
, SOL_ALG
, ALG_SET_KEY
, key
, klen
);
355 ALG_PERR("%s: Failed to set socket option : ", __func__
);
356 AFALGerr(AFALG_F_AFALG_SET_KEY
, AFALG_R_SOCKET_SET_KEY_FAILED
);
362 static int afalg_create_sk(afalg_ctx
*actx
, const char *ciphertype
,
363 const char *ciphername
)
365 struct sockaddr_alg sa
;
368 actx
->bfd
= actx
->sfd
= -1;
370 memset(&sa
, 0, sizeof(sa
));
371 sa
.salg_family
= AF_ALG
;
372 strncpy((char *) sa
.salg_type
, ciphertype
, ALG_MAX_SALG_TYPE
);
373 sa
.salg_type
[ALG_MAX_SALG_TYPE
-1] = '\0';
374 strncpy((char *) sa
.salg_name
, ciphername
, ALG_MAX_SALG_NAME
);
375 sa
.salg_name
[ALG_MAX_SALG_NAME
-1] = '\0';
377 actx
->bfd
= socket(AF_ALG
, SOCK_SEQPACKET
, 0);
378 if (actx
->bfd
== -1) {
379 ALG_PERR("%s: Failed to open socket : ", __func__
);
380 AFALGerr(AFALG_F_AFALG_CREATE_SK
, AFALG_R_SOCKET_CREATE_FAILED
);
384 r
= bind(actx
->bfd
, (struct sockaddr
*)&sa
, sizeof(sa
));
386 ALG_PERR("%s: Failed to bind socket : ", __func__
);
387 AFALGerr(AFALG_F_AFALG_CREATE_SK
, AFALG_R_SOCKET_BIND_FAILED
);
391 actx
->sfd
= accept(actx
->bfd
, NULL
, 0);
393 ALG_PERR("%s: Socket Accept Failed : ", __func__
);
394 AFALGerr(AFALG_F_AFALG_CREATE_SK
, AFALG_R_SOCKET_ACCEPT_FAILED
);
405 actx
->bfd
= actx
->sfd
= -1;
409 static int afalg_start_cipher_sk(afalg_ctx
*actx
, const unsigned char *in
,
410 size_t inl
, const unsigned char *iv
,
413 struct msghdr msg
= { 0 };
414 struct cmsghdr
*cmsg
;
417 # ifdef ALG_ZERO_COPY
420 char cbuf
[CMSG_SPACE(ALG_IV_LEN(ALG_AES_IV_LEN
)) + CMSG_SPACE(ALG_OP_LEN
)];
422 memset(cbuf
, 0, sizeof(cbuf
));
423 msg
.msg_control
= cbuf
;
424 msg
.msg_controllen
= sizeof(cbuf
);
427 * cipher direction (i.e. encrypt or decrypt) and iv are sent to the
428 * kernel as part of sendmsg()'s ancillary data
430 cmsg
= CMSG_FIRSTHDR(&msg
);
431 afalg_set_op_sk(cmsg
, enc
);
432 cmsg
= CMSG_NXTHDR(&msg
, cmsg
);
433 afalg_set_iv_sk(cmsg
, iv
, ALG_AES_IV_LEN
);
435 /* iov that describes input data */
436 iov
.iov_base
= (unsigned char *)in
;
439 msg
.msg_flags
= MSG_MORE
;
441 # ifdef ALG_ZERO_COPY
444 * Works best when buffer is 4k aligned
445 * OPENS: out of place processing (i.e. out != in)
448 /* Input data is not sent as part of call to sendmsg() */
452 /* Sendmsg() sends iv and cipher direction to the kernel */
453 sbytes
= sendmsg(actx
->sfd
, &msg
, 0);
455 ALG_PERR("%s: sendmsg failed for zero copy cipher operation : ",
461 * vmsplice and splice are used to pin the user space input buffer for
462 * kernel space processing avoiding copys from user to kernel space
464 ret
= vmsplice(actx
->zc_pipe
[1], &iov
, 1, SPLICE_F_GIFT
);
466 ALG_PERR("%s: vmsplice failed : ", __func__
);
470 ret
= splice(actx
->zc_pipe
[0], NULL
, actx
->sfd
, NULL
, inl
, 0);
472 ALG_PERR("%s: splice failed : ", __func__
);
479 /* Sendmsg() sends iv, cipher direction and input data to the kernel */
480 sbytes
= sendmsg(actx
->sfd
, &msg
, 0);
482 ALG_PERR("%s: sendmsg failed for cipher operation : ", __func__
);
486 if (sbytes
!= (ssize_t
) inl
) {
487 ALG_WARN("Cipher operation send bytes %zd != inlen %zd\n", sbytes
,
496 static int afalg_cipher_init(EVP_CIPHER_CTX
*ctx
, const unsigned char *key
,
497 const unsigned char *iv
, int enc
)
502 char ciphername
[ALG_MAX_SALG_NAME
];
504 if (ctx
== NULL
|| key
== NULL
) {
505 ALG_WARN("%s: Null Parameter\n", __func__
);
509 if (EVP_CIPHER_CTX_cipher(ctx
) == NULL
) {
510 ALG_WARN("%s: Cipher object NULL\n", __func__
);
514 actx
= EVP_CIPHER_CTX_get_cipher_data(ctx
);
516 ALG_WARN("%s: Cipher data NULL\n", __func__
);
520 ciphertype
= EVP_CIPHER_CTX_nid(ctx
);
521 switch (ciphertype
) {
522 case NID_aes_128_cbc
:
523 case NID_aes_192_cbc
:
524 case NID_aes_256_cbc
:
525 strncpy(ciphername
, "cbc(aes)", ALG_MAX_SALG_NAME
);
528 ALG_WARN("%s: Unsupported Cipher type %d\n", __func__
, ciphertype
);
531 ciphername
[ALG_MAX_SALG_NAME
-1]='\0';
533 if (ALG_AES_IV_LEN
!= EVP_CIPHER_CTX_iv_length(ctx
)) {
534 ALG_WARN("%s: Unsupported IV length :%d\n", __func__
,
535 EVP_CIPHER_CTX_iv_length(ctx
));
539 /* Setup AFALG socket for crypto processing */
540 ret
= afalg_create_sk(actx
, "skcipher", ciphername
);
545 ret
= afalg_set_key(actx
, key
, EVP_CIPHER_CTX_key_length(ctx
));
549 /* Setup AIO ctx to allow async AFALG crypto processing */
550 if (afalg_init_aio(&actx
->aio
) == 0)
553 # ifdef ALG_ZERO_COPY
557 actx
->init_done
= MAGIC_INIT_NUM
;
567 static int afalg_do_cipher(EVP_CIPHER_CTX
*ctx
, unsigned char *out
,
568 const unsigned char *in
, size_t inl
)
572 char nxtiv
[ALG_AES_IV_LEN
] = { 0 };
574 if (ctx
== NULL
|| out
== NULL
|| in
== NULL
) {
575 ALG_WARN("NULL parameter passed to function %s\n", __func__
);
579 actx
= (afalg_ctx
*) EVP_CIPHER_CTX_get_cipher_data(ctx
);
580 if (actx
== NULL
|| actx
->init_done
!= MAGIC_INIT_NUM
) {
581 ALG_WARN("%s afalg ctx passed\n",
582 ctx
== NULL
? "NULL" : "Uninitialised");
587 * set iv now for decrypt operation as the input buffer can be
588 * overwritten for inplace operation where in = out.
590 if (EVP_CIPHER_CTX_encrypting(ctx
) == 0) {
591 memcpy(nxtiv
, in
+ (inl
- ALG_AES_IV_LEN
), ALG_AES_IV_LEN
);
594 /* Send input data to kernel space */
595 ret
= afalg_start_cipher_sk(actx
, (unsigned char *)in
, inl
,
596 EVP_CIPHER_CTX_iv(ctx
),
597 EVP_CIPHER_CTX_encrypting(ctx
));
602 /* Perform async crypto operation in kernel space */
603 ret
= afalg_fin_cipher_aio(&actx
->aio
, actx
->sfd
, out
, inl
);
607 if (EVP_CIPHER_CTX_encrypting(ctx
)) {
608 memcpy(EVP_CIPHER_CTX_iv_noconst(ctx
), out
+ (inl
- ALG_AES_IV_LEN
),
611 memcpy(EVP_CIPHER_CTX_iv_noconst(ctx
), nxtiv
, ALG_AES_IV_LEN
);
617 static int afalg_cipher_cleanup(EVP_CIPHER_CTX
*ctx
)
622 ALG_WARN("NULL parameter passed to function %s\n", __func__
);
626 actx
= (afalg_ctx
*) EVP_CIPHER_CTX_get_cipher_data(ctx
);
627 if (actx
== NULL
|| actx
->init_done
!= MAGIC_INIT_NUM
) {
628 ALG_WARN("%s afalg ctx passed\n",
629 ctx
== NULL
? "NULL" : "Uninitialised");
635 # ifdef ALG_ZERO_COPY
636 close(actx
->zc_pipe
[0]);
637 close(actx
->zc_pipe
[1]);
639 /* close efd in sync mode, async mode is closed in afalg_waitfd_cleanup() */
640 if (actx
->aio
.mode
== MODE_SYNC
)
641 close(actx
->aio
.efd
);
642 io_destroy(actx
->aio
.aio_ctx
);
647 static cbc_handles
*get_cipher_handle(int nid
)
650 case NID_aes_128_cbc
:
651 return &cbc_handle
[AES_CBC_128
];
652 case NID_aes_192_cbc
:
653 return &cbc_handle
[AES_CBC_192
];
654 case NID_aes_256_cbc
:
655 return &cbc_handle
[AES_CBC_256
];
661 static const EVP_CIPHER
*afalg_aes_cbc(int nid
)
663 cbc_handles
*cipher_handle
= get_cipher_handle(nid
);
664 if (cipher_handle
->_hidden
== NULL
665 && ((cipher_handle
->_hidden
=
666 EVP_CIPHER_meth_new(nid
,
668 cipher_handle
->key_size
)) == NULL
669 || !EVP_CIPHER_meth_set_iv_length(cipher_handle
->_hidden
,
671 || !EVP_CIPHER_meth_set_flags(cipher_handle
->_hidden
,
673 EVP_CIPH_FLAG_DEFAULT_ASN1
)
674 || !EVP_CIPHER_meth_set_init(cipher_handle
->_hidden
,
676 || !EVP_CIPHER_meth_set_do_cipher(cipher_handle
->_hidden
,
678 || !EVP_CIPHER_meth_set_cleanup(cipher_handle
->_hidden
,
679 afalg_cipher_cleanup
)
680 || !EVP_CIPHER_meth_set_impl_ctx_size(cipher_handle
->_hidden
,
681 sizeof(afalg_ctx
)))) {
682 EVP_CIPHER_meth_free(cipher_handle
->_hidden
);
683 cipher_handle
->_hidden
= NULL
;
685 return cipher_handle
->_hidden
;
688 static int afalg_ciphers(ENGINE
*e
, const EVP_CIPHER
**cipher
,
689 const int **nids
, int nid
)
693 if (cipher
== NULL
) {
694 *nids
= afalg_cipher_nids
;
695 return (sizeof(afalg_cipher_nids
) / sizeof(afalg_cipher_nids
[0]));
699 case NID_aes_128_cbc
:
700 case NID_aes_192_cbc
:
701 case NID_aes_256_cbc
:
702 *cipher
= afalg_aes_cbc(nid
);
711 static int bind_afalg(ENGINE
*e
)
713 /* Ensure the afalg error handling is set up */
715 ERR_load_AFALG_strings();
717 if (!ENGINE_set_id(e
, engine_afalg_id
)
718 || !ENGINE_set_name(e
, engine_afalg_name
)
719 || !ENGINE_set_destroy_function(e
, afalg_destroy
)
720 || !ENGINE_set_init_function(e
, afalg_init
)
721 || !ENGINE_set_finish_function(e
, afalg_finish
)) {
722 AFALGerr(AFALG_F_BIND_AFALG
, AFALG_R_INIT_FAILED
);
727 * Create _hidden_aes_xxx_cbc by calling afalg_aes_xxx_cbc
728 * now, as bind_aflag can only be called by one thread at a
731 for(i
= 0; i
< OSSL_NELEM(afalg_cipher_nids
); i
++) {
732 if (afalg_aes_cbc(afalg_cipher_nids
[i
]) == NULL
) {
733 AFALGerr(AFALG_F_BIND_AFALG
, AFALG_R_INIT_FAILED
);
738 if (!ENGINE_set_ciphers(e
, afalg_ciphers
)) {
739 AFALGerr(AFALG_F_BIND_AFALG
, AFALG_R_INIT_FAILED
);
746 # ifndef OPENSSL_NO_DYNAMIC_ENGINE
747 static int bind_helper(ENGINE
*e
, const char *id
)
749 if (id
&& (strcmp(id
, engine_afalg_id
) != 0))
752 if (!afalg_chk_platform())
760 IMPLEMENT_DYNAMIC_CHECK_FN()
761 IMPLEMENT_DYNAMIC_BIND_FN(bind_helper
)
764 static int afalg_chk_platform(void)
768 int kver
[3] = { -1, -1, -1 };
775 AFALGerr(AFALG_F_AFALG_CHK_PLATFORM
,
776 AFALG_R_FAILED_TO_GET_PLATFORM_INFO
);
780 str
= strtok(ut
.release
, ".");
781 for (i
= 0; i
< 3 && str
!= NULL
; i
++) {
783 str
= strtok(NULL
, ".");
786 if (KERNEL_VERSION(kver
[0], kver
[1], kver
[2])
787 < KERNEL_VERSION(K_MAJ
, K_MIN1
, K_MIN2
)) {
788 ALG_ERR("ASYNC AFALG not supported this kernel(%d.%d.%d)\n",
789 kver
[0], kver
[1], kver
[2]);
790 ALG_ERR("ASYNC AFALG requires kernel version %d.%d.%d or later\n",
791 K_MAJ
, K_MIN1
, K_MIN2
);
792 AFALGerr(AFALG_F_AFALG_CHK_PLATFORM
,
793 AFALG_R_KERNEL_DOES_NOT_SUPPORT_ASYNC_AFALG
);
797 /* Test if we can actually create an AF_ALG socket */
798 sock
= socket(AF_ALG
, SOCK_SEQPACKET
, 0);
800 AFALGerr(AFALG_F_AFALG_CHK_PLATFORM
, AFALG_R_SOCKET_CREATE_FAILED
);
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_int(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 free_cbc(void)
849 short unsigned int i
;
850 for(i
= 0; i
< OSSL_NELEM(afalg_cipher_nids
); i
++) {
851 EVP_CIPHER_meth_free(cbc_handle
[i
]._hidden
);
852 cbc_handle
[i
]._hidden
= NULL
;
857 static int afalg_destroy(ENGINE
*e
)
859 ERR_unload_AFALG_strings();
864 #endif /* KERNEL VERSION */