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rtems-libbsd/freebsd/crypto/openssl/engines/e_afalg.c
Sebastian Huber b3169c2a6a Update to FreeBSD head 2018-10-23 
Git mirror commit 59f44d20be3f99d181ca742e636d45fc39ec982b.

This commit updates OpenSSL to version 1.1.1.  This required an update
of racoon which uses some internal stuff from OpenSSL and seems to be
mostly unmaintained, e.g. there is update in the FreeBSD ports to cope
with OpenSSL 1.1.1.

Update #3472.
2018-10-25 08:38:45 +02:00

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#include <machine/rtems-bsd-user-space.h>
/*
* Copyright 2016-2018 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the OpenSSL license (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
* in the file LICENSE in the source distribution or at
* https://www.openssl.org/source/license.html
*/
/* Required for vmsplice */
#ifndef _GNU_SOURCE
# define _GNU_SOURCE
#endif
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <openssl/engine.h>
#include <openssl/async.h>
#include <openssl/err.h>
#include "internal/nelem.h"
#include <sys/socket.h>
#include <linux/version.h>
#define K_MAJ 4
#define K_MIN1 1
#define K_MIN2 0
#if LINUX_VERSION_CODE < KERNEL_VERSION(K_MAJ, K_MIN1, K_MIN2) || \
!defined(AF_ALG)
# ifndef PEDANTIC
# warning "AFALG ENGINE requires Kernel Headers >= 4.1.0"
# warning "Skipping Compilation of AFALG engine"
# endif
void engine_load_afalg_int(void);
void engine_load_afalg_int(void)
{
}
#else
# include <linux/if_alg.h>
# include <fcntl.h>
# include <sys/utsname.h>
# include <linux/aio_abi.h>
# include <sys/syscall.h>
# include <errno.h>
# include "e_afalg.h"
# include "e_afalg_err.c"
# ifndef SOL_ALG
# define SOL_ALG 279
# endif
# ifdef ALG_ZERO_COPY
# ifndef SPLICE_F_GIFT
# define SPLICE_F_GIFT (0x08)
# endif
# endif
# define ALG_AES_IV_LEN 16
# define ALG_IV_LEN(len) (sizeof(struct af_alg_iv) + (len))
# define ALG_OP_TYPE unsigned int
# define ALG_OP_LEN (sizeof(ALG_OP_TYPE))
#define ALG_MAX_SALG_NAME 64
#define ALG_MAX_SALG_TYPE 14
# ifdef OPENSSL_NO_DYNAMIC_ENGINE
void engine_load_afalg_int(void);
# endif
/* Local Linkage Functions */
static int afalg_init_aio(afalg_aio *aio);
static int afalg_fin_cipher_aio(afalg_aio *ptr, int sfd,
unsigned char *buf, size_t len);
static int afalg_create_sk(afalg_ctx *actx, const char *ciphertype,
const char *ciphername);
static int afalg_destroy(ENGINE *e);
static int afalg_init(ENGINE *e);
static int afalg_finish(ENGINE *e);
static const EVP_CIPHER *afalg_aes_cbc(int nid);
static cbc_handles *get_cipher_handle(int nid);
static int afalg_ciphers(ENGINE *e, const EVP_CIPHER **cipher,
const int **nids, int nid);
static int afalg_cipher_init(EVP_CIPHER_CTX *ctx, const unsigned char *key,
const unsigned char *iv, int enc);
static int afalg_do_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
const unsigned char *in, size_t inl);
static int afalg_cipher_cleanup(EVP_CIPHER_CTX *ctx);
static int afalg_chk_platform(void);
/* Engine Id and Name */
static const char *engine_afalg_id = "afalg";
static const char *engine_afalg_name = "AFALG engine support";
static int afalg_cipher_nids[] = {
NID_aes_128_cbc,
NID_aes_192_cbc,
NID_aes_256_cbc,
};
static cbc_handles cbc_handle[] = {{AES_KEY_SIZE_128, NULL},
{AES_KEY_SIZE_192, NULL},
{AES_KEY_SIZE_256, NULL}};
static ossl_inline int io_setup(unsigned n, aio_context_t *ctx)
{
return syscall(__NR_io_setup, n, ctx);
}
static ossl_inline int eventfd(int n)
{
return syscall(__NR_eventfd2, n, 0);
}
static ossl_inline int io_destroy(aio_context_t ctx)
{
return syscall(__NR_io_destroy, ctx);
}
static ossl_inline int io_read(aio_context_t ctx, long n, struct iocb **iocb)
{
return syscall(__NR_io_submit, ctx, n, iocb);
}
static ossl_inline int io_getevents(aio_context_t ctx, long min, long max,
struct io_event *events,
struct timespec *timeout)
{
return syscall(__NR_io_getevents, ctx, min, max, events, timeout);
}
static void afalg_waitfd_cleanup(ASYNC_WAIT_CTX *ctx, const void *key,
OSSL_ASYNC_FD waitfd, void *custom)
{
close(waitfd);
}
static int afalg_setup_async_event_notification(afalg_aio *aio)
{
ASYNC_JOB *job;
ASYNC_WAIT_CTX *waitctx;
void *custom = NULL;
int ret;
if ((job = ASYNC_get_current_job()) != NULL) {
/* Async mode */
waitctx = ASYNC_get_wait_ctx(job);
if (waitctx == NULL) {
ALG_WARN("%s(%d): ASYNC_get_wait_ctx error", __FILE__, __LINE__);
return 0;
}
/* Get waitfd from ASYNC_WAIT_CTX if it is already set */
ret = ASYNC_WAIT_CTX_get_fd(waitctx, engine_afalg_id,
&aio->efd, &custom);
if (ret == 0) {
/*
* waitfd is not set in ASYNC_WAIT_CTX, create a new one
* and set it. efd will be signaled when AIO operation completes
*/
aio->efd = eventfd(0);
if (aio->efd == -1) {
ALG_PERR("%s(%d): Failed to get eventfd : ", __FILE__,
__LINE__);
AFALGerr(AFALG_F_AFALG_SETUP_ASYNC_EVENT_NOTIFICATION,
AFALG_R_EVENTFD_FAILED);
return 0;
}
ret = ASYNC_WAIT_CTX_set_wait_fd(waitctx, engine_afalg_id,
aio->efd, custom,
afalg_waitfd_cleanup);
if (ret == 0) {
ALG_WARN("%s(%d): Failed to set wait fd", __FILE__, __LINE__);
close(aio->efd);
return 0;
}
/* make fd non-blocking in async mode */
if (fcntl(aio->efd, F_SETFL, O_NONBLOCK) != 0) {
ALG_WARN("%s(%d): Failed to set event fd as NONBLOCKING",
__FILE__, __LINE__);
}
}
aio->mode = MODE_ASYNC;
} else {
/* Sync mode */
aio->efd = eventfd(0);
if (aio->efd == -1) {
ALG_PERR("%s(%d): Failed to get eventfd : ", __FILE__, __LINE__);
AFALGerr(AFALG_F_AFALG_SETUP_ASYNC_EVENT_NOTIFICATION,
AFALG_R_EVENTFD_FAILED);
return 0;
}
aio->mode = MODE_SYNC;
}
return 1;
}
static int afalg_init_aio(afalg_aio *aio)
{
int r = -1;
/* Initialise for AIO */
aio->aio_ctx = 0;
r = io_setup(MAX_INFLIGHTS, &aio->aio_ctx);
if (r < 0) {
ALG_PERR("%s(%d): io_setup error : ", __FILE__, __LINE__);
AFALGerr(AFALG_F_AFALG_INIT_AIO, AFALG_R_IO_SETUP_FAILED);
return 0;
}
memset(aio->cbt, 0, sizeof(aio->cbt));
aio->efd = -1;
aio->mode = MODE_UNINIT;
return 1;
}
static int afalg_fin_cipher_aio(afalg_aio *aio, int sfd, unsigned char *buf,
size_t len)
{
int r;
int retry = 0;
unsigned int done = 0;
struct iocb *cb;
struct timespec timeout;
struct io_event events[MAX_INFLIGHTS];
u_int64_t eval = 0;
timeout.tv_sec = 0;
timeout.tv_nsec = 0;
/* if efd has not been initialised yet do it here */
if (aio->mode == MODE_UNINIT) {
r = afalg_setup_async_event_notification(aio);
if (r == 0)
return 0;
}
cb = &(aio->cbt[0 % MAX_INFLIGHTS]);
memset(cb, '\0', sizeof(*cb));
cb->aio_fildes = sfd;
cb->aio_lio_opcode = IOCB_CMD_PREAD;
/*
* The pointer has to be converted to unsigned value first to avoid
* sign extension on cast to 64 bit value in 32-bit builds
*/
cb->aio_buf = (size_t)buf;
cb->aio_offset = 0;
cb->aio_data = 0;
cb->aio_nbytes = len;
cb->aio_flags = IOCB_FLAG_RESFD;
cb->aio_resfd = aio->efd;
/*
* Perform AIO read on AFALG socket, this in turn performs an async
* crypto operation in kernel space
*/
r = io_read(aio->aio_ctx, 1, &cb);
if (r < 0) {
ALG_PWARN("%s(%d): io_read failed : ", __FILE__, __LINE__);
return 0;
}
do {
/* While AIO read is being performed pause job */
ASYNC_pause_job();
/* Check for completion of AIO read */
r = read(aio->efd, &eval, sizeof(eval));
if (r < 0) {
if (errno == EAGAIN || errno == EWOULDBLOCK)
continue;
ALG_PERR("%s(%d): read failed for event fd : ", __FILE__, __LINE__);
return 0;
} else if (r == 0 || eval <= 0) {
ALG_WARN("%s(%d): eventfd read %d bytes, eval = %lu\n", __FILE__,
__LINE__, r, eval);
}
if (eval > 0) {
/* Get results of AIO read */
r = io_getevents(aio->aio_ctx, 1, MAX_INFLIGHTS,
events, &timeout);
if (r > 0) {
/*
* events.res indicates the actual status of the operation.
* Handle the error condition first.
*/
if (events[0].res < 0) {
/*
* Underlying operation cannot be completed at the time
* of previous submission. Resubmit for the operation.
*/
if (events[0].res == -EBUSY && retry++ < 3) {
r = io_read(aio->aio_ctx, 1, &cb);
if (r < 0) {
ALG_PERR("%s(%d): retry %d for io_read failed : ",
__FILE__, __LINE__, retry);
return 0;
}
continue;
} else {
/*
* Retries exceed for -EBUSY or unrecoverable error
* condition for this instance of operation.
*/
ALG_WARN
("%s(%d): Crypto Operation failed with code %lld\n",
__FILE__, __LINE__, events[0].res);
return 0;
}
}
/* Operation successful. */
done = 1;
} else if (r < 0) {
ALG_PERR("%s(%d): io_getevents failed : ", __FILE__, __LINE__);
return 0;
} else {
ALG_WARN("%s(%d): io_geteventd read 0 bytes\n", __FILE__,
__LINE__);
}
}
} while (!done);
return 1;
}
static ossl_inline void afalg_set_op_sk(struct cmsghdr *cmsg,
const ALG_OP_TYPE op)
{
cmsg->cmsg_level = SOL_ALG;
cmsg->cmsg_type = ALG_SET_OP;
cmsg->cmsg_len = CMSG_LEN(ALG_OP_LEN);
memcpy(CMSG_DATA(cmsg), &op, ALG_OP_LEN);
}
static void afalg_set_iv_sk(struct cmsghdr *cmsg, const unsigned char *iv,
const unsigned int len)
{
struct af_alg_iv *aiv;
cmsg->cmsg_level = SOL_ALG;
cmsg->cmsg_type = ALG_SET_IV;
cmsg->cmsg_len = CMSG_LEN(ALG_IV_LEN(len));
aiv = (struct af_alg_iv *)CMSG_DATA(cmsg);
aiv->ivlen = len;
memcpy(aiv->iv, iv, len);
}
static ossl_inline int afalg_set_key(afalg_ctx *actx, const unsigned char *key,
const int klen)
{
int ret;
ret = setsockopt(actx->bfd, SOL_ALG, ALG_SET_KEY, key, klen);
if (ret < 0) {
ALG_PERR("%s(%d): Failed to set socket option : ", __FILE__, __LINE__);
AFALGerr(AFALG_F_AFALG_SET_KEY, AFALG_R_SOCKET_SET_KEY_FAILED);
return 0;
}
return 1;
}
static int afalg_create_sk(afalg_ctx *actx, const char *ciphertype,
const char *ciphername)
{
struct sockaddr_alg sa;
int r = -1;
actx->bfd = actx->sfd = -1;
memset(&sa, 0, sizeof(sa));
sa.salg_family = AF_ALG;
strncpy((char *) sa.salg_type, ciphertype, ALG_MAX_SALG_TYPE);
sa.salg_type[ALG_MAX_SALG_TYPE-1] = '\0';
strncpy((char *) sa.salg_name, ciphername, ALG_MAX_SALG_NAME);
sa.salg_name[ALG_MAX_SALG_NAME-1] = '\0';
actx->bfd = socket(AF_ALG, SOCK_SEQPACKET, 0);
if (actx->bfd == -1) {
ALG_PERR("%s(%d): Failed to open socket : ", __FILE__, __LINE__);
AFALGerr(AFALG_F_AFALG_CREATE_SK, AFALG_R_SOCKET_CREATE_FAILED);
goto err;
}
r = bind(actx->bfd, (struct sockaddr *)&sa, sizeof(sa));
if (r < 0) {
ALG_PERR("%s(%d): Failed to bind socket : ", __FILE__, __LINE__);
AFALGerr(AFALG_F_AFALG_CREATE_SK, AFALG_R_SOCKET_BIND_FAILED);
goto err;
}
actx->sfd = accept(actx->bfd, NULL, 0);
if (actx->sfd < 0) {
ALG_PERR("%s(%d): Socket Accept Failed : ", __FILE__, __LINE__);
AFALGerr(AFALG_F_AFALG_CREATE_SK, AFALG_R_SOCKET_ACCEPT_FAILED);
goto err;
}
return 1;
err:
if (actx->bfd >= 0)
close(actx->bfd);
if (actx->sfd >= 0)
close(actx->sfd);
actx->bfd = actx->sfd = -1;
return 0;
}
static int afalg_start_cipher_sk(afalg_ctx *actx, const unsigned char *in,
size_t inl, const unsigned char *iv,
unsigned int enc)
{
struct msghdr msg = { 0 };
struct cmsghdr *cmsg;
struct iovec iov;
ssize_t sbytes;
# ifdef ALG_ZERO_COPY
int ret;
# endif
char cbuf[CMSG_SPACE(ALG_IV_LEN(ALG_AES_IV_LEN)) + CMSG_SPACE(ALG_OP_LEN)];
memset(cbuf, 0, sizeof(cbuf));
msg.msg_control = cbuf;
msg.msg_controllen = sizeof(cbuf);
/*
* cipher direction (i.e. encrypt or decrypt) and iv are sent to the
* kernel as part of sendmsg()'s ancillary data
*/
cmsg = CMSG_FIRSTHDR(&msg);
afalg_set_op_sk(cmsg, enc);
cmsg = CMSG_NXTHDR(&msg, cmsg);
afalg_set_iv_sk(cmsg, iv, ALG_AES_IV_LEN);
/* iov that describes input data */
iov.iov_base = (unsigned char *)in;
iov.iov_len = inl;
msg.msg_flags = MSG_MORE;
# ifdef ALG_ZERO_COPY
/*
* ZERO_COPY mode
* Works best when buffer is 4k aligned
* OPENS: out of place processing (i.e. out != in)
*/
/* Input data is not sent as part of call to sendmsg() */
msg.msg_iovlen = 0;
msg.msg_iov = NULL;
/* Sendmsg() sends iv and cipher direction to the kernel */
sbytes = sendmsg(actx->sfd, &msg, 0);
if (sbytes < 0) {
ALG_PERR("%s(%d): sendmsg failed for zero copy cipher operation : ",
__FILE__, __LINE__);
return 0;
}
/*
* vmsplice and splice are used to pin the user space input buffer for
* kernel space processing avoiding copys from user to kernel space
*/
ret = vmsplice(actx->zc_pipe[1], &iov, 1, SPLICE_F_GIFT);
if (ret < 0) {
ALG_PERR("%s(%d): vmsplice failed : ", __FILE__, __LINE__);
return 0;
}
ret = splice(actx->zc_pipe[0], NULL, actx->sfd, NULL, inl, 0);
if (ret < 0) {
ALG_PERR("%s(%d): splice failed : ", __FILE__, __LINE__);
return 0;
}
# else
msg.msg_iovlen = 1;
msg.msg_iov = &iov;
/* Sendmsg() sends iv, cipher direction and input data to the kernel */
sbytes = sendmsg(actx->sfd, &msg, 0);
if (sbytes < 0) {
ALG_PERR("%s(%d): sendmsg failed for cipher operation : ", __FILE__,
__LINE__);
return 0;
}
if (sbytes != (ssize_t) inl) {
ALG_WARN("Cipher operation send bytes %zd != inlen %zd\n", sbytes,
inl);
return 0;
}
# endif
return 1;
}
static int afalg_cipher_init(EVP_CIPHER_CTX *ctx, const unsigned char *key,
const unsigned char *iv, int enc)
{
int ciphertype;
int ret;
afalg_ctx *actx;
char ciphername[ALG_MAX_SALG_NAME];
if (ctx == NULL || key == NULL) {
ALG_WARN("%s(%d): Null Parameter\n", __FILE__, __LINE__);
return 0;
}
if (EVP_CIPHER_CTX_cipher(ctx) == NULL) {
ALG_WARN("%s(%d): Cipher object NULL\n", __FILE__, __LINE__);
return 0;
}
actx = EVP_CIPHER_CTX_get_cipher_data(ctx);
if (actx == NULL) {
ALG_WARN("%s(%d): Cipher data NULL\n", __FILE__, __LINE__);
return 0;
}
ciphertype = EVP_CIPHER_CTX_nid(ctx);
switch (ciphertype) {
case NID_aes_128_cbc:
case NID_aes_192_cbc:
case NID_aes_256_cbc:
strncpy(ciphername, "cbc(aes)", ALG_MAX_SALG_NAME);
break;
default:
ALG_WARN("%s(%d): Unsupported Cipher type %d\n", __FILE__, __LINE__,
ciphertype);
return 0;
}
ciphername[ALG_MAX_SALG_NAME-1]='\0';
if (ALG_AES_IV_LEN != EVP_CIPHER_CTX_iv_length(ctx)) {
ALG_WARN("%s(%d): Unsupported IV length :%d\n", __FILE__, __LINE__,
EVP_CIPHER_CTX_iv_length(ctx));
return 0;
}
/* Setup AFALG socket for crypto processing */
ret = afalg_create_sk(actx, "skcipher", ciphername);
if (ret < 1)
return 0;
ret = afalg_set_key(actx, key, EVP_CIPHER_CTX_key_length(ctx));
if (ret < 1)
goto err;
/* Setup AIO ctx to allow async AFALG crypto processing */
if (afalg_init_aio(&actx->aio) == 0)
goto err;
# ifdef ALG_ZERO_COPY
pipe(actx->zc_pipe);
# endif
actx->init_done = MAGIC_INIT_NUM;
return 1;
err:
close(actx->sfd);
close(actx->bfd);
return 0;
}
static int afalg_do_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
const unsigned char *in, size_t inl)
{
afalg_ctx *actx;
int ret;
char nxtiv[ALG_AES_IV_LEN] = { 0 };
if (ctx == NULL || out == NULL || in == NULL) {
ALG_WARN("NULL parameter passed to function %s(%d)\n", __FILE__,
__LINE__);
return 0;
}
actx = (afalg_ctx *) EVP_CIPHER_CTX_get_cipher_data(ctx);
if (actx == NULL || actx->init_done != MAGIC_INIT_NUM) {
ALG_WARN("%s afalg ctx passed\n",
ctx == NULL ? "NULL" : "Uninitialised");
return 0;
}
/*
* set iv now for decrypt operation as the input buffer can be
* overwritten for inplace operation where in = out.
*/
if (EVP_CIPHER_CTX_encrypting(ctx) == 0) {
memcpy(nxtiv, in + (inl - ALG_AES_IV_LEN), ALG_AES_IV_LEN);
}
/* Send input data to kernel space */
ret = afalg_start_cipher_sk(actx, (unsigned char *)in, inl,
EVP_CIPHER_CTX_iv(ctx),
EVP_CIPHER_CTX_encrypting(ctx));
if (ret < 1) {
return 0;
}
/* Perform async crypto operation in kernel space */
ret = afalg_fin_cipher_aio(&actx->aio, actx->sfd, out, inl);
if (ret < 1)
return 0;
if (EVP_CIPHER_CTX_encrypting(ctx)) {
memcpy(EVP_CIPHER_CTX_iv_noconst(ctx), out + (inl - ALG_AES_IV_LEN),
ALG_AES_IV_LEN);
} else {
memcpy(EVP_CIPHER_CTX_iv_noconst(ctx), nxtiv, ALG_AES_IV_LEN);
}
return 1;
}
static int afalg_cipher_cleanup(EVP_CIPHER_CTX *ctx)
{
afalg_ctx *actx;
if (ctx == NULL) {
ALG_WARN("NULL parameter passed to function %s(%d)\n", __FILE__,
__LINE__);
return 0;
}
actx = (afalg_ctx *) EVP_CIPHER_CTX_get_cipher_data(ctx);
if (actx == NULL || actx->init_done != MAGIC_INIT_NUM) {
ALG_WARN("%s afalg ctx passed\n",
ctx == NULL ? "NULL" : "Uninitialised");
return 0;
}
close(actx->sfd);
close(actx->bfd);
# ifdef ALG_ZERO_COPY
close(actx->zc_pipe[0]);
close(actx->zc_pipe[1]);
# endif
/* close efd in sync mode, async mode is closed in afalg_waitfd_cleanup() */
if (actx->aio.mode == MODE_SYNC)
close(actx->aio.efd);
io_destroy(actx->aio.aio_ctx);
return 1;
}
static cbc_handles *get_cipher_handle(int nid)
{
switch (nid) {
case NID_aes_128_cbc:
return &cbc_handle[AES_CBC_128];
case NID_aes_192_cbc:
return &cbc_handle[AES_CBC_192];
case NID_aes_256_cbc:
return &cbc_handle[AES_CBC_256];
default:
return NULL;
}
}
static const EVP_CIPHER *afalg_aes_cbc(int nid)
{
cbc_handles *cipher_handle = get_cipher_handle(nid);
if (cipher_handle->_hidden == NULL
&& ((cipher_handle->_hidden =
EVP_CIPHER_meth_new(nid,
AES_BLOCK_SIZE,
cipher_handle->key_size)) == NULL
|| !EVP_CIPHER_meth_set_iv_length(cipher_handle->_hidden,
AES_IV_LEN)
|| !EVP_CIPHER_meth_set_flags(cipher_handle->_hidden,
EVP_CIPH_CBC_MODE |
EVP_CIPH_FLAG_DEFAULT_ASN1)
|| !EVP_CIPHER_meth_set_init(cipher_handle->_hidden,
afalg_cipher_init)
|| !EVP_CIPHER_meth_set_do_cipher(cipher_handle->_hidden,
afalg_do_cipher)
|| !EVP_CIPHER_meth_set_cleanup(cipher_handle->_hidden,
afalg_cipher_cleanup)
|| !EVP_CIPHER_meth_set_impl_ctx_size(cipher_handle->_hidden,
sizeof(afalg_ctx)))) {
EVP_CIPHER_meth_free(cipher_handle->_hidden);
cipher_handle->_hidden= NULL;
}
return cipher_handle->_hidden;
}
static int afalg_ciphers(ENGINE *e, const EVP_CIPHER **cipher,
const int **nids, int nid)
{
int r = 1;
if (cipher == NULL) {
*nids = afalg_cipher_nids;
return (sizeof(afalg_cipher_nids) / sizeof(afalg_cipher_nids[0]));
}
switch (nid) {
case NID_aes_128_cbc:
case NID_aes_192_cbc:
case NID_aes_256_cbc:
*cipher = afalg_aes_cbc(nid);
break;
default:
*cipher = NULL;
r = 0;
}
return r;
}
static int bind_afalg(ENGINE *e)
{
/* Ensure the afalg error handling is set up */
unsigned short i;
ERR_load_AFALG_strings();
if (!ENGINE_set_id(e, engine_afalg_id)
|| !ENGINE_set_name(e, engine_afalg_name)
|| !ENGINE_set_destroy_function(e, afalg_destroy)
|| !ENGINE_set_init_function(e, afalg_init)
|| !ENGINE_set_finish_function(e, afalg_finish)) {
AFALGerr(AFALG_F_BIND_AFALG, AFALG_R_INIT_FAILED);
return 0;
}
/*
* Create _hidden_aes_xxx_cbc by calling afalg_aes_xxx_cbc
* now, as bind_aflag can only be called by one thread at a
* time.
*/
for(i = 0; i < OSSL_NELEM(afalg_cipher_nids); i++) {
if (afalg_aes_cbc(afalg_cipher_nids[i]) == NULL) {
AFALGerr(AFALG_F_BIND_AFALG, AFALG_R_INIT_FAILED);
return 0;
}
}
if (!ENGINE_set_ciphers(e, afalg_ciphers)) {
AFALGerr(AFALG_F_BIND_AFALG, AFALG_R_INIT_FAILED);
return 0;
}
return 1;
}
# ifndef OPENSSL_NO_DYNAMIC_ENGINE
static int bind_helper(ENGINE *e, const char *id)
{
if (id && (strcmp(id, engine_afalg_id) != 0))
return 0;
if (!afalg_chk_platform())
return 0;
if (!bind_afalg(e))
return 0;
return 1;
}
IMPLEMENT_DYNAMIC_CHECK_FN()
IMPLEMENT_DYNAMIC_BIND_FN(bind_helper)
# endif
static int afalg_chk_platform(void)
{
int ret;
int i;
int kver[3] = { -1, -1, -1 };
int sock;
char *str;
struct utsname ut;
ret = uname(&ut);
if (ret != 0) {
AFALGerr(AFALG_F_AFALG_CHK_PLATFORM,
AFALG_R_FAILED_TO_GET_PLATFORM_INFO);
return 0;
}
str = strtok(ut.release, ".");
for (i = 0; i < 3 && str != NULL; i++) {
kver[i] = atoi(str);
str = strtok(NULL, ".");
}
if (KERNEL_VERSION(kver[0], kver[1], kver[2])
< KERNEL_VERSION(K_MAJ, K_MIN1, K_MIN2)) {
ALG_ERR("ASYNC AFALG not supported this kernel(%d.%d.%d)\n",
kver[0], kver[1], kver[2]);
ALG_ERR("ASYNC AFALG requires kernel version %d.%d.%d or later\n",
K_MAJ, K_MIN1, K_MIN2);
AFALGerr(AFALG_F_AFALG_CHK_PLATFORM,
AFALG_R_KERNEL_DOES_NOT_SUPPORT_ASYNC_AFALG);
return 0;
}
/* Test if we can actually create an AF_ALG socket */
sock = socket(AF_ALG, SOCK_SEQPACKET, 0);
if (sock == -1) {
AFALGerr(AFALG_F_AFALG_CHK_PLATFORM, AFALG_R_SOCKET_CREATE_FAILED);
return 0;
}
close(sock);
return 1;
}
# ifdef OPENSSL_NO_DYNAMIC_ENGINE
static ENGINE *engine_afalg(void)
{
ENGINE *ret = ENGINE_new();
if (ret == NULL)
return NULL;
if (!bind_afalg(ret)) {
ENGINE_free(ret);
return NULL;
}
return ret;
}
void engine_load_afalg_int(void)
{
ENGINE *toadd;
if (!afalg_chk_platform())
return;
toadd = engine_afalg();
if (toadd == NULL)
return;
ENGINE_add(toadd);
ENGINE_free(toadd);
ERR_clear_error();
}
# endif
static int afalg_init(ENGINE *e)
{
return 1;
}
static int afalg_finish(ENGINE *e)
{
return 1;
}
static int free_cbc(void)
{
short unsigned int i;
for(i = 0; i < OSSL_NELEM(afalg_cipher_nids); i++) {
EVP_CIPHER_meth_free(cbc_handle[i]._hidden);
cbc_handle[i]._hidden = NULL;
}
return 1;
}
static int afalg_destroy(ENGINE *e)
{
ERR_unload_AFALG_strings();
free_cbc();
return 1;
}
#endif /* KERNEL VERSION */
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