+++ /dev/null
-/*
- * Copyright 2016 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 <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"
-
-# define AFALG_LIB_NAME "AFALG"
-# include "e_afalg_err.h"
-
-# 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);
-const EVP_CIPHER *afalg_aes_128_cbc(void);
-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
-};
-
-static EVP_CIPHER *_hidden_aes_128_cbc = 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_eventfd, n);
-}
-
-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: ASYNC_get_wait_ctx error", __func__);
- return 0;
- }
- /* Get waitfd from ASYNC_WAIT_CTX if it is alreday 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: Failed to get eventfd : ", __func__);
- 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: Failed to set wait fd", __func__);
- close(aio->efd);
- return 0;
- }
- /* make fd non-blocking in async mode */
- if (fcntl(aio->efd, F_SETFL, O_NONBLOCK) != 0) {
- ALG_WARN("%s: Failed to set event fd as NONBLOCKING",
- __func__);
- }
- }
- aio->mode = MODE_ASYNC;
- } else {
- /* Sync mode */
- aio->efd = eventfd(0);
- if (aio->efd == -1) {
- ALG_PERR("%s: Failed to get eventfd : ", __func__);
- AFALGerr(AFALG_F_AFALG_SETUP_ASYNC_EVENT_NOTIFICATION,
- AFALG_R_EVENTFD_FAILED);
- return 0;
- }
- aio->mode = MODE_SYNC;
- }
- return 1;
-}
-
-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: io_setup error : ", __func__);
- 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;
-}
-
-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: io_read failed : ", __func__);
- 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: read failed for event fd : ", __func__);
- return 0;
- } else if (r == 0 || eval <= 0) {
- ALG_WARN("%s: eventfd read %d bytes, eval = %lu\n", __func__, 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: retry %d for io_read failed : ",
- __func__, retry);
- return 0;
- }
- continue;
- } else {
- /*
- * Retries exceed for -EBUSY or unrecoverable error
- * condition for this instance of operation.
- */
- ALG_WARN
- ("%s: Crypto Operation failed with code %lld\n",
- __func__, events[0].res);
- return 0;
- }
- }
- /* Operation successful. */
- done = 1;
- } else if (r < 0) {
- ALG_PERR("%s: io_getevents failed : ", __func__);
- return 0;
- } else {
- ALG_WARN("%s: io_geteventd read 0 bytes\n", __func__);
- }
- }
- } 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: Failed to set socket option : ", __func__);
- 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: Failed to open socket : ", __func__);
- 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: Failed to bind socket : ", __func__);
- 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: Socket Accept Failed : ", __func__);
- 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: sendmsg failed for zero copy cipher operation : ",
- __func__);
- 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: vmsplice failed : ", __func__);
- return 0;
- }
-
- ret = splice(actx->zc_pipe[0], NULL, actx->sfd, NULL, inl, 0);
- if (ret < 0) {
- ALG_PERR("%s: splice failed : ", __func__);
- 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: sendmsg failed for cipher operation : ", __func__);
- 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: Null Parameter\n", __func__);
- return 0;
- }
-
- if (EVP_CIPHER_CTX_cipher(ctx) == NULL) {
- ALG_WARN("%s: Cipher object NULL\n", __func__);
- return 0;
- }
-
- actx = EVP_CIPHER_CTX_get_cipher_data(ctx);
- if (actx == NULL) {
- ALG_WARN("%s: Cipher data NULL\n", __func__);
- return 0;
- }
-
- ciphertype = EVP_CIPHER_CTX_nid(ctx);
- switch (ciphertype) {
- case NID_aes_128_cbc:
- strncpy(ciphername, "cbc(aes)", ALG_MAX_SALG_NAME);
- break;
- default:
- ALG_WARN("%s: Unsupported Cipher type %d\n", __func__, ciphertype);
- return 0;
- }
- ciphername[ALG_MAX_SALG_NAME-1]='\0';
-
- if (ALG_AES_IV_LEN != EVP_CIPHER_CTX_iv_length(ctx)) {
- ALG_WARN("%s: Unsupported IV length :%d\n", __func__,
- 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\n", __func__);
- 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\n", __func__);
- 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;
-}
-
-const EVP_CIPHER *afalg_aes_128_cbc(void)
-{
- if (_hidden_aes_128_cbc == NULL
- && ((_hidden_aes_128_cbc =
- EVP_CIPHER_meth_new(NID_aes_128_cbc,
- AES_BLOCK_SIZE,
- AES_KEY_SIZE_128)) == NULL
- || !EVP_CIPHER_meth_set_iv_length(_hidden_aes_128_cbc, AES_IV_LEN)
- || !EVP_CIPHER_meth_set_flags(_hidden_aes_128_cbc,
- EVP_CIPH_CBC_MODE |
- EVP_CIPH_FLAG_DEFAULT_ASN1)
- || !EVP_CIPHER_meth_set_init(_hidden_aes_128_cbc,
- afalg_cipher_init)
- || !EVP_CIPHER_meth_set_do_cipher(_hidden_aes_128_cbc,
- afalg_do_cipher)
- || !EVP_CIPHER_meth_set_cleanup(_hidden_aes_128_cbc,
- afalg_cipher_cleanup)
- || !EVP_CIPHER_meth_set_impl_ctx_size(_hidden_aes_128_cbc,
- sizeof(afalg_ctx)))) {
- EVP_CIPHER_meth_free(_hidden_aes_128_cbc);
- _hidden_aes_128_cbc = NULL;
- }
- return _hidden_aes_128_cbc;
-}
-
-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:
- *cipher = afalg_aes_128_cbc();
- break;
- default:
- *cipher = NULL;
- r = 0;
- }
-
- return r;
-}
-
-static int bind_afalg(ENGINE *e)
-{
- /* Ensure the afalg error handling is set up */
- 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_128_cbc by calling afalg_aes_128_cbc
- * now, as bind_aflag can only be called by one thread at a
- * time.
- */
- if (afalg_aes_128_cbc() == 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 afalg_destroy(ENGINE *e)
-{
- ERR_unload_AFALG_strings();
- EVP_CIPHER_meth_free(_hidden_aes_128_cbc);
- _hidden_aes_128_cbc = NULL;
- return 1;
-}
-
-#endif /* KERNEL VERSION */
projects / openssl.git / blobdiff