mirror of
https://github.com/openssl/openssl.git
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1287dabd0b
Reviewed-by: Tomas Mraz <tomas@openssl.org> Reviewed-by: Richard Levitte <levitte@openssl.org> Reviewed-by: Paul Dale <pauli@openssl.org> (Merged from https://github.com/openssl/openssl/pull/16918)
934 lines
27 KiB
C
934 lines
27 KiB
C
/*
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* Copyright 2016-2021 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the Apache License 2.0 (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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/* We need to use some deprecated APIs */
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#define OPENSSL_SUPPRESS_DEPRECATED
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/* Required for vmsplice */
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#ifndef _GNU_SOURCE
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# define _GNU_SOURCE
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#endif
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#include <stdio.h>
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#include <string.h>
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#include <unistd.h>
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#include <openssl/engine.h>
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#include <openssl/async.h>
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#include <openssl/err.h>
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#include "internal/nelem.h"
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#include <sys/socket.h>
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#include <linux/version.h>
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#define K_MAJ 4
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#define K_MIN1 1
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#define K_MIN2 0
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#if LINUX_VERSION_CODE < KERNEL_VERSION(K_MAJ, K_MIN1, K_MIN2) || \
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!defined(AF_ALG)
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# ifndef PEDANTIC
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# warning "AFALG ENGINE requires Kernel Headers >= 4.1.0"
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# warning "Skipping Compilation of AFALG engine"
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# endif
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void engine_load_afalg_int(void);
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void engine_load_afalg_int(void)
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{
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}
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#else
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# include <linux/if_alg.h>
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# include <fcntl.h>
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# include <sys/utsname.h>
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# include <linux/aio_abi.h>
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# include <sys/syscall.h>
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# include <errno.h>
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# include "e_afalg.h"
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# include "e_afalg_err.c"
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# ifndef SOL_ALG
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# define SOL_ALG 279
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# endif
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# ifdef ALG_ZERO_COPY
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# ifndef SPLICE_F_GIFT
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# define SPLICE_F_GIFT (0x08)
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# endif
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# endif
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# define ALG_AES_IV_LEN 16
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# define ALG_IV_LEN(len) (sizeof(struct af_alg_iv) + (len))
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# define ALG_OP_TYPE unsigned int
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# define ALG_OP_LEN (sizeof(ALG_OP_TYPE))
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# ifdef OPENSSL_NO_DYNAMIC_ENGINE
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void engine_load_afalg_int(void);
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# endif
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/* Local Linkage Functions */
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static int afalg_init_aio(afalg_aio *aio);
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static int afalg_fin_cipher_aio(afalg_aio *ptr, int sfd,
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unsigned char *buf, size_t len);
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static int afalg_create_sk(afalg_ctx *actx, const char *ciphertype,
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const char *ciphername);
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static int afalg_destroy(ENGINE *e);
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static int afalg_init(ENGINE *e);
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static int afalg_finish(ENGINE *e);
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static const EVP_CIPHER *afalg_aes_cbc(int nid);
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static cbc_handles *get_cipher_handle(int nid);
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static int afalg_ciphers(ENGINE *e, const EVP_CIPHER **cipher,
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const int **nids, int nid);
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static int afalg_cipher_init(EVP_CIPHER_CTX *ctx, const unsigned char *key,
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const unsigned char *iv, int enc);
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static int afalg_do_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
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const unsigned char *in, size_t inl);
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static int afalg_cipher_cleanup(EVP_CIPHER_CTX *ctx);
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static int afalg_chk_platform(void);
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/* Engine Id and Name */
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static const char *engine_afalg_id = "afalg";
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static const char *engine_afalg_name = "AFALG engine support";
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static int afalg_cipher_nids[] = {
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NID_aes_128_cbc,
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NID_aes_192_cbc,
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NID_aes_256_cbc,
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};
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static cbc_handles cbc_handle[] = {{AES_KEY_SIZE_128, NULL},
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{AES_KEY_SIZE_192, NULL},
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{AES_KEY_SIZE_256, NULL}};
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static ossl_inline int io_setup(unsigned n, aio_context_t *ctx)
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{
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return syscall(__NR_io_setup, n, ctx);
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}
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static ossl_inline int eventfd(int n)
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{
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return syscall(__NR_eventfd2, n, 0);
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}
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static ossl_inline int io_destroy(aio_context_t ctx)
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{
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return syscall(__NR_io_destroy, ctx);
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}
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static ossl_inline int io_read(aio_context_t ctx, long n, struct iocb **iocb)
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{
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return syscall(__NR_io_submit, ctx, n, iocb);
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}
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/* A version of 'struct timespec' with 32-bit time_t and nanoseconds. */
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struct __timespec32
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{
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__kernel_long_t tv_sec;
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__kernel_long_t tv_nsec;
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};
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static ossl_inline int io_getevents(aio_context_t ctx, long min, long max,
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struct io_event *events,
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struct timespec *timeout)
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{
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#if defined(__NR_io_pgetevents_time64)
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/* Check if we are a 32-bit architecture with a 64-bit time_t */
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if (sizeof(*timeout) != sizeof(struct __timespec32)) {
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int ret = syscall(__NR_io_pgetevents_time64, ctx, min, max, events,
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timeout, NULL);
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if (ret == 0 || errno != ENOSYS)
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return ret;
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}
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#endif
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#if defined(__NR_io_getevents)
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if (sizeof(*timeout) == sizeof(struct __timespec32))
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/*
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* time_t matches our architecture length, we can just use
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* __NR_io_getevents
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*/
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return syscall(__NR_io_getevents, ctx, min, max, events, timeout);
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else {
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/*
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* We don't have __NR_io_pgetevents_time64, but we are using a
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* 64-bit time_t on a 32-bit architecture. If we can fit the
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* timeout value in a 32-bit time_t, then let's do that
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* and then use the __NR_io_getevents syscall.
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*/
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if (timeout && timeout->tv_sec == (long)timeout->tv_sec) {
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struct __timespec32 ts32;
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ts32.tv_sec = (__kernel_long_t) timeout->tv_sec;
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ts32.tv_nsec = (__kernel_long_t) timeout->tv_nsec;
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return syscall(__NR_io_getevents, ctx, min, max, events, ts32);
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} else {
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return syscall(__NR_io_getevents, ctx, min, max, events, NULL);
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}
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}
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#endif
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errno = ENOSYS;
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return -1;
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}
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static void afalg_waitfd_cleanup(ASYNC_WAIT_CTX *ctx, const void *key,
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OSSL_ASYNC_FD waitfd, void *custom)
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{
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close(waitfd);
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}
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static int afalg_setup_async_event_notification(afalg_aio *aio)
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{
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ASYNC_JOB *job;
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ASYNC_WAIT_CTX *waitctx;
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void *custom = NULL;
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int ret;
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if ((job = ASYNC_get_current_job()) != NULL) {
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/* Async mode */
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waitctx = ASYNC_get_wait_ctx(job);
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if (waitctx == NULL) {
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ALG_WARN("%s(%d): ASYNC_get_wait_ctx error", __FILE__, __LINE__);
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return 0;
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}
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/* Get waitfd from ASYNC_WAIT_CTX if it is already set */
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ret = ASYNC_WAIT_CTX_get_fd(waitctx, engine_afalg_id,
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&aio->efd, &custom);
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if (ret == 0) {
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/*
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* waitfd is not set in ASYNC_WAIT_CTX, create a new one
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* and set it. efd will be signaled when AIO operation completes
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*/
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aio->efd = eventfd(0);
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if (aio->efd == -1) {
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ALG_PERR("%s(%d): Failed to get eventfd : ", __FILE__,
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__LINE__);
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AFALGerr(AFALG_F_AFALG_SETUP_ASYNC_EVENT_NOTIFICATION,
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AFALG_R_EVENTFD_FAILED);
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return 0;
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}
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ret = ASYNC_WAIT_CTX_set_wait_fd(waitctx, engine_afalg_id,
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aio->efd, custom,
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afalg_waitfd_cleanup);
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if (ret == 0) {
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ALG_WARN("%s(%d): Failed to set wait fd", __FILE__, __LINE__);
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close(aio->efd);
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return 0;
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}
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/* make fd non-blocking in async mode */
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if (fcntl(aio->efd, F_SETFL, O_NONBLOCK) != 0) {
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ALG_WARN("%s(%d): Failed to set event fd as NONBLOCKING",
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__FILE__, __LINE__);
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}
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}
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aio->mode = MODE_ASYNC;
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} else {
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/* Sync mode */
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aio->efd = eventfd(0);
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if (aio->efd == -1) {
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ALG_PERR("%s(%d): Failed to get eventfd : ", __FILE__, __LINE__);
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AFALGerr(AFALG_F_AFALG_SETUP_ASYNC_EVENT_NOTIFICATION,
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AFALG_R_EVENTFD_FAILED);
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return 0;
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}
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aio->mode = MODE_SYNC;
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}
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return 1;
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}
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static int afalg_init_aio(afalg_aio *aio)
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{
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int r = -1;
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/* Initialise for AIO */
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aio->aio_ctx = 0;
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r = io_setup(MAX_INFLIGHTS, &aio->aio_ctx);
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if (r < 0) {
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ALG_PERR("%s(%d): io_setup error : ", __FILE__, __LINE__);
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AFALGerr(AFALG_F_AFALG_INIT_AIO, AFALG_R_IO_SETUP_FAILED);
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return 0;
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}
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memset(aio->cbt, 0, sizeof(aio->cbt));
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aio->efd = -1;
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aio->mode = MODE_UNINIT;
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return 1;
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}
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static int afalg_fin_cipher_aio(afalg_aio *aio, int sfd, unsigned char *buf,
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size_t len)
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{
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int r;
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int retry = 0;
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unsigned int done = 0;
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struct iocb *cb;
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struct timespec timeout;
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struct io_event events[MAX_INFLIGHTS];
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u_int64_t eval = 0;
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timeout.tv_sec = 0;
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timeout.tv_nsec = 0;
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/* if efd has not been initialised yet do it here */
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if (aio->mode == MODE_UNINIT) {
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r = afalg_setup_async_event_notification(aio);
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if (r == 0)
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return 0;
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}
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cb = &(aio->cbt[0 % MAX_INFLIGHTS]);
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memset(cb, '\0', sizeof(*cb));
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cb->aio_fildes = sfd;
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cb->aio_lio_opcode = IOCB_CMD_PREAD;
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/*
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* The pointer has to be converted to unsigned value first to avoid
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* sign extension on cast to 64 bit value in 32-bit builds
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*/
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cb->aio_buf = (size_t)buf;
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cb->aio_offset = 0;
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cb->aio_data = 0;
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cb->aio_nbytes = len;
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cb->aio_flags = IOCB_FLAG_RESFD;
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cb->aio_resfd = aio->efd;
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/*
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* Perform AIO read on AFALG socket, this in turn performs an async
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* crypto operation in kernel space
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*/
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r = io_read(aio->aio_ctx, 1, &cb);
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if (r < 0) {
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ALG_PWARN("%s(%d): io_read failed : ", __FILE__, __LINE__);
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return 0;
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}
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do {
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/* While AIO read is being performed pause job */
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ASYNC_pause_job();
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/* Check for completion of AIO read */
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r = read(aio->efd, &eval, sizeof(eval));
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if (r < 0) {
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if (errno == EAGAIN || errno == EWOULDBLOCK)
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continue;
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ALG_PERR("%s(%d): read failed for event fd : ", __FILE__, __LINE__);
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return 0;
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} else if (r == 0 || eval <= 0) {
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ALG_WARN("%s(%d): eventfd read %d bytes, eval = %lu\n", __FILE__,
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__LINE__, r, eval);
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}
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if (eval > 0) {
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#ifdef OSSL_SANITIZE_MEMORY
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/*
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* In a memory sanitiser build, the changes to memory made by the
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* system call aren't reliably detected. By initialising the
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* memory here, the sanitiser is told that they are okay.
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*/
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memset(events, 0, sizeof(events));
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#endif
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/* Get results of AIO read */
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r = io_getevents(aio->aio_ctx, 1, MAX_INFLIGHTS,
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events, &timeout);
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if (r > 0) {
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/*
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* events.res indicates the actual status of the operation.
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* Handle the error condition first.
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*/
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if (events[0].res < 0) {
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/*
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* Underlying operation cannot be completed at the time
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* of previous submission. Resubmit for the operation.
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*/
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if (events[0].res == -EBUSY && retry++ < 3) {
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r = io_read(aio->aio_ctx, 1, &cb);
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if (r < 0) {
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ALG_PERR("%s(%d): retry %d for io_read failed : ",
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__FILE__, __LINE__, retry);
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return 0;
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}
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continue;
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} else {
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/*
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* Retries exceed for -EBUSY or unrecoverable error
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* condition for this instance of operation.
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*/
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ALG_WARN
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("%s(%d): Crypto Operation failed with code %lld\n",
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__FILE__, __LINE__, events[0].res);
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return 0;
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}
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}
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/* Operation successful. */
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done = 1;
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} else if (r < 0) {
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ALG_PERR("%s(%d): io_getevents failed : ", __FILE__, __LINE__);
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return 0;
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} else {
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ALG_WARN("%s(%d): io_geteventd read 0 bytes\n", __FILE__,
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__LINE__);
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}
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}
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} while (!done);
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return 1;
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}
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static ossl_inline void afalg_set_op_sk(struct cmsghdr *cmsg,
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const ALG_OP_TYPE op)
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{
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cmsg->cmsg_level = SOL_ALG;
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cmsg->cmsg_type = ALG_SET_OP;
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cmsg->cmsg_len = CMSG_LEN(ALG_OP_LEN);
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memcpy(CMSG_DATA(cmsg), &op, ALG_OP_LEN);
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}
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static void afalg_set_iv_sk(struct cmsghdr *cmsg, const unsigned char *iv,
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const unsigned int len)
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{
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struct af_alg_iv *aiv;
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cmsg->cmsg_level = SOL_ALG;
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cmsg->cmsg_type = ALG_SET_IV;
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cmsg->cmsg_len = CMSG_LEN(ALG_IV_LEN(len));
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aiv = (struct af_alg_iv *)CMSG_DATA(cmsg);
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aiv->ivlen = len;
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memcpy(aiv->iv, iv, len);
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}
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|
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static ossl_inline int afalg_set_key(afalg_ctx *actx, const unsigned char *key,
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const int klen)
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{
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int ret;
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ret = setsockopt(actx->bfd, SOL_ALG, ALG_SET_KEY, key, klen);
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if (ret < 0) {
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ALG_PERR("%s(%d): Failed to set socket option : ", __FILE__, __LINE__);
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AFALGerr(AFALG_F_AFALG_SET_KEY, AFALG_R_SOCKET_SET_KEY_FAILED);
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return 0;
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}
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return 1;
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}
|
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|
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static int afalg_create_sk(afalg_ctx *actx, const char *ciphertype,
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const char *ciphername)
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{
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struct sockaddr_alg sa;
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int r = -1;
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actx->bfd = actx->sfd = -1;
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|
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memset(&sa, 0, sizeof(sa));
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sa.salg_family = AF_ALG;
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OPENSSL_strlcpy((char *) sa.salg_type, ciphertype, sizeof(sa.salg_type));
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OPENSSL_strlcpy((char *) sa.salg_name, ciphername, sizeof(sa.salg_name));
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|
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actx->bfd = socket(AF_ALG, SOCK_SEQPACKET, 0);
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if (actx->bfd == -1) {
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ALG_PERR("%s(%d): Failed to open socket : ", __FILE__, __LINE__);
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AFALGerr(AFALG_F_AFALG_CREATE_SK, AFALG_R_SOCKET_CREATE_FAILED);
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goto err;
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}
|
|
|
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r = bind(actx->bfd, (struct sockaddr *)&sa, sizeof(sa));
|
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if (r < 0) {
|
|
ALG_PERR("%s(%d): Failed to bind socket : ", __FILE__, __LINE__);
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AFALGerr(AFALG_F_AFALG_CREATE_SK, AFALG_R_SOCKET_BIND_FAILED);
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goto err;
|
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}
|
|
|
|
actx->sfd = accept(actx->bfd, NULL, 0);
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|
if (actx->sfd < 0) {
|
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ALG_PERR("%s(%d): Socket Accept Failed : ", __FILE__, __LINE__);
|
|
AFALGerr(AFALG_F_AFALG_CREATE_SK, AFALG_R_SOCKET_ACCEPT_FAILED);
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goto err;
|
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}
|
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|
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return 1;
|
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|
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err:
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if (actx->bfd >= 0)
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close(actx->bfd);
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if (actx->sfd >= 0)
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close(actx->sfd);
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actx->bfd = actx->sfd = -1;
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return 0;
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}
|
|
|
|
static int afalg_start_cipher_sk(afalg_ctx *actx, const unsigned char *in,
|
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size_t inl, const unsigned char *iv,
|
|
unsigned int enc)
|
|
{
|
|
struct msghdr msg;
|
|
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)];
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|
|
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memset(&msg, 0, sizeof(msg));
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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 copies 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, len;
|
|
afalg_ctx *actx;
|
|
const char *ciphername;
|
|
|
|
if (ctx == NULL || key == NULL) {
|
|
ALG_WARN("%s(%d): Null Parameter\n", __FILE__, __LINE__);
|
|
return 0;
|
|
}
|
|
|
|
if (EVP_CIPHER_CTX_get0_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_get_nid(ctx);
|
|
switch (ciphertype) {
|
|
case NID_aes_128_cbc:
|
|
case NID_aes_192_cbc:
|
|
case NID_aes_256_cbc:
|
|
ciphername = "cbc(aes)";
|
|
break;
|
|
default:
|
|
ALG_WARN("%s(%d): Unsupported Cipher type %d\n", __FILE__, __LINE__,
|
|
ciphertype);
|
|
return 0;
|
|
}
|
|
|
|
if (ALG_AES_IV_LEN != EVP_CIPHER_CTX_get_iv_length(ctx)) {
|
|
ALG_WARN("%s(%d): Unsupported IV length :%d\n", __FILE__, __LINE__,
|
|
EVP_CIPHER_CTX_get_iv_length(ctx));
|
|
return 0;
|
|
}
|
|
|
|
/* Setup AFALG socket for crypto processing */
|
|
ret = afalg_create_sk(actx, "skcipher", ciphername);
|
|
if (ret < 1)
|
|
return 0;
|
|
|
|
if ((len = EVP_CIPHER_CTX_get_key_length(ctx)) <= 0)
|
|
goto err;
|
|
ret = afalg_set_key(actx, key, len);
|
|
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_is_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_is_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_is_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)
|
|
return 1;
|
|
|
|
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 == NULL)
|
|
return NULL;
|
|
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;
|
|
ERR_set_mark();
|
|
ENGINE_add(toadd);
|
|
/*
|
|
* If the "add" worked, it gets a structural reference. So either way, we
|
|
* release our just-created reference.
|
|
*/
|
|
ENGINE_free(toadd);
|
|
/*
|
|
* If the "add" didn't work, it was probably a conflict because it was
|
|
* already added (eg. someone calling ENGINE_load_blah then calling
|
|
* ENGINE_load_builtin_engines() perhaps).
|
|
*/
|
|
ERR_pop_to_mark();
|
|
}
|
|
# 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 */
|