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108 lines
2.5 KiB
C
108 lines
2.5 KiB
C
#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#ifdef VANILLA_NACL /* toxcore only uses this when libsodium is unavailable */
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/*-
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* Copyright 2013 Alexander Peslyak
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifdef HAVE_SYS_MMAN_H
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# include <sys/mman.h>
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#endif
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#include <errno.h>
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#include <stdlib.h>
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#include "crypto_scrypt.h"
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#include "runtime.h"
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#if !defined(MAP_ANON) && defined(MAP_ANONYMOUS)
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# define MAP_ANON MAP_ANONYMOUS
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#endif
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void *
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alloc_region(escrypt_region_t * region, size_t size)
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{
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uint8_t * base, * aligned;
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#ifdef MAP_ANON
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if ((base = (uint8_t *) mmap(NULL, size, PROT_READ | PROT_WRITE,
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#ifdef MAP_NOCORE
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MAP_ANON | MAP_PRIVATE | MAP_NOCORE,
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#else
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MAP_ANON | MAP_PRIVATE,
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#endif
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-1, 0)) == MAP_FAILED)
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base = NULL;
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aligned = base;
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#elif defined(HAVE_POSIX_MEMALIGN)
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if ((errno = posix_memalign((void **) &base, 64, size)) != 0)
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base = NULL;
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aligned = base;
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#else
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base = aligned = NULL;
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if (size + 63 < size)
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errno = ENOMEM;
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else if ((base = (uint8_t *) malloc(size + 63)) != NULL) {
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aligned = base + 63;
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aligned -= (uintptr_t)aligned & 63;
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}
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#endif
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region->base = base;
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region->aligned = aligned;
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region->size = base ? size : 0;
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return aligned;
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}
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static inline void
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init_region(escrypt_region_t * region)
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{
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region->base = region->aligned = NULL;
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region->size = 0;
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}
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int
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free_region(escrypt_region_t * region)
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{
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if (region->base) {
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#ifdef MAP_ANON
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if (munmap(region->base, region->size))
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return -1;
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#else
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free(region->base);
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#endif
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}
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init_region(region);
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return 0;
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}
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int
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escrypt_init_local(escrypt_local_t * local)
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{
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init_region(local);
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return 0;
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}
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int
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escrypt_free_local(escrypt_local_t * local)
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{
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return free_region(local);
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}
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#endif
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