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Diffstat (limited to 'Cryptlib/OpenSSL/crypto/mem_sec.c')
-rw-r--r--Cryptlib/OpenSSL/crypto/mem_sec.c585
1 files changed, 0 insertions, 585 deletions
diff --git a/Cryptlib/OpenSSL/crypto/mem_sec.c b/Cryptlib/OpenSSL/crypto/mem_sec.c
deleted file mode 100644
index 0c79b436..00000000
--- a/Cryptlib/OpenSSL/crypto/mem_sec.c
+++ /dev/null
@@ -1,585 +0,0 @@
-/*
- * Copyright 2015-2016 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
- */
-
-/*
- * Copyright 2004-2014, Akamai Technologies. All Rights Reserved.
- * This file is distributed under the terms of the OpenSSL license.
- */
-
-/*
- * This file is in two halves. The first half implements the public API
- * to be used by external consumers, and to be used by OpenSSL to store
- * data in a "secure arena." The second half implements the secure arena.
- * For details on that implementation, see below (look for uppercase
- * "SECURE HEAP IMPLEMENTATION").
- */
-#include <openssl/crypto.h>
-#include <e_os.h>
-
-#include <string.h>
-
-#if defined(OPENSSL_SYS_LINUX) || defined(OPENSSL_SYS_UNIX)
-# define IMPLEMENTED
-# include <stdlib.h>
-# include <assert.h>
-# include <unistd.h>
-# include <sys/types.h>
-# include <sys/mman.h>
-# include <sys/param.h>
-# include <sys/stat.h>
-# include <fcntl.h>
-#endif
-
-#define CLEAR(p, s) OPENSSL_cleanse(p, s)
-#ifndef PAGE_SIZE
-# define PAGE_SIZE 4096
-#endif
-
-#ifdef IMPLEMENTED
-static size_t secure_mem_used;
-
-static int secure_mem_initialized;
-
-static CRYPTO_RWLOCK *sec_malloc_lock = NULL;
-
-/*
- * These are the functions that must be implemented by a secure heap (sh).
- */
-static int sh_init(size_t size, int minsize);
-static char *sh_malloc(size_t size);
-static void sh_free(char *ptr);
-static void sh_done(void);
-static size_t sh_actual_size(char *ptr);
-static int sh_allocated(const char *ptr);
-#endif
-
-int CRYPTO_secure_malloc_init(size_t size, int minsize)
-{
-#ifdef IMPLEMENTED
- int ret = 0;
-
- if (!secure_mem_initialized) {
- sec_malloc_lock = CRYPTO_THREAD_lock_new();
- if (sec_malloc_lock == NULL)
- return 0;
- ret = sh_init(size, minsize);
- secure_mem_initialized = 1;
- }
-
- return ret;
-#else
- return 0;
-#endif /* IMPLEMENTED */
-}
-
-int CRYPTO_secure_malloc_done()
-{
-#ifdef IMPLEMENTED
- if (secure_mem_used == 0) {
- sh_done();
- secure_mem_initialized = 0;
- CRYPTO_THREAD_lock_free(sec_malloc_lock);
- return 1;
- }
-#endif /* IMPLEMENTED */
- return 0;
-}
-
-int CRYPTO_secure_malloc_initialized()
-{
-#ifdef IMPLEMENTED
- return secure_mem_initialized;
-#else
- return 0;
-#endif /* IMPLEMENTED */
-}
-
-void *CRYPTO_secure_malloc(size_t num, const char *file, int line)
-{
-#ifdef IMPLEMENTED
- void *ret;
- size_t actual_size;
-
- if (!secure_mem_initialized) {
- return CRYPTO_malloc(num, file, line);
- }
- CRYPTO_THREAD_write_lock(sec_malloc_lock);
- ret = sh_malloc(num);
- actual_size = ret ? sh_actual_size(ret) : 0;
- secure_mem_used += actual_size;
- CRYPTO_THREAD_unlock(sec_malloc_lock);
- return ret;
-#else
- return CRYPTO_malloc(num, file, line);
-#endif /* IMPLEMENTED */
-}
-
-void *CRYPTO_secure_zalloc(size_t num, const char *file, int line)
-{
- void *ret = CRYPTO_secure_malloc(num, file, line);
-
- if (ret != NULL)
- memset(ret, 0, num);
- return ret;
-}
-
-void CRYPTO_secure_free(void *ptr, const char *file, int line)
-{
-#ifdef IMPLEMENTED
- size_t actual_size;
-
- if (ptr == NULL)
- return;
- if (!CRYPTO_secure_allocated(ptr)) {
- CRYPTO_free(ptr, file, line);
- return;
- }
- CRYPTO_THREAD_write_lock(sec_malloc_lock);
- actual_size = sh_actual_size(ptr);
- CLEAR(ptr, actual_size);
- secure_mem_used -= actual_size;
- sh_free(ptr);
- CRYPTO_THREAD_unlock(sec_malloc_lock);
-#else
- CRYPTO_free(ptr, file, line);
-#endif /* IMPLEMENTED */
-}
-
-int CRYPTO_secure_allocated(const void *ptr)
-{
-#ifdef IMPLEMENTED
- int ret;
-
- if (!secure_mem_initialized)
- return 0;
- CRYPTO_THREAD_write_lock(sec_malloc_lock);
- ret = sh_allocated(ptr);
- CRYPTO_THREAD_unlock(sec_malloc_lock);
- return ret;
-#else
- return 0;
-#endif /* IMPLEMENTED */
-}
-
-size_t CRYPTO_secure_used()
-{
-#ifdef IMPLEMENTED
- return secure_mem_used;
-#else
- return 0;
-#endif /* IMPLEMENTED */
-}
-
-size_t CRYPTO_secure_actual_size(void *ptr)
-{
-#ifdef IMPLEMENTED
- size_t actual_size;
-
- CRYPTO_THREAD_write_lock(sec_malloc_lock);
- actual_size = sh_actual_size(ptr);
- CRYPTO_THREAD_unlock(sec_malloc_lock);
- return actual_size;
-#else
- return 0;
-#endif
-}
-/* END OF PAGE ...
-
- ... START OF PAGE */
-
-/*
- * SECURE HEAP IMPLEMENTATION
- */
-#ifdef IMPLEMENTED
-
-
-/*
- * The implementation provided here uses a fixed-sized mmap() heap,
- * which is locked into memory, not written to core files, and protected
- * on either side by an unmapped page, which will catch pointer overruns
- * (or underruns) and an attempt to read data out of the secure heap.
- * Free'd memory is zero'd or otherwise cleansed.
- *
- * This is a pretty standard buddy allocator. We keep areas in a multiple
- * of "sh.minsize" units. The freelist and bitmaps are kept separately,
- * so all (and only) data is kept in the mmap'd heap.
- *
- * This code assumes eight-bit bytes. The numbers 3 and 7 are all over the
- * place.
- */
-
-#define ONE ((size_t)1)
-
-# define TESTBIT(t, b) (t[(b) >> 3] & (ONE << ((b) & 7)))
-# define SETBIT(t, b) (t[(b) >> 3] |= (ONE << ((b) & 7)))
-# define CLEARBIT(t, b) (t[(b) >> 3] &= (0xFF & ~(ONE << ((b) & 7))))
-
-#define WITHIN_ARENA(p) \
- ((char*)(p) >= sh.arena && (char*)(p) < &sh.arena[sh.arena_size])
-#define WITHIN_FREELIST(p) \
- ((char*)(p) >= (char*)sh.freelist && (char*)(p) < (char*)&sh.freelist[sh.freelist_size])
-
-
-typedef struct sh_list_st
-{
- struct sh_list_st *next;
- struct sh_list_st **p_next;
-} SH_LIST;
-
-typedef struct sh_st
-{
- char* map_result;
- size_t map_size;
- char *arena;
- size_t arena_size;
- char **freelist;
- ossl_ssize_t freelist_size;
- size_t minsize;
- unsigned char *bittable;
- unsigned char *bitmalloc;
- size_t bittable_size; /* size in bits */
-} SH;
-
-static SH sh;
-
-static size_t sh_getlist(char *ptr)
-{
- ossl_ssize_t list = sh.freelist_size - 1;
- size_t bit = (sh.arena_size + ptr - sh.arena) / sh.minsize;
-
- for (; bit; bit >>= 1, list--) {
- if (TESTBIT(sh.bittable, bit))
- break;
- OPENSSL_assert((bit & 1) == 0);
- }
-
- return list;
-}
-
-
-static int sh_testbit(char *ptr, int list, unsigned char *table)
-{
- size_t bit;
-
- OPENSSL_assert(list >= 0 && list < sh.freelist_size);
- OPENSSL_assert(((ptr - sh.arena) & ((sh.arena_size >> list) - 1)) == 0);
- bit = (ONE << list) + ((ptr - sh.arena) / (sh.arena_size >> list));
- OPENSSL_assert(bit > 0 && bit < sh.bittable_size);
- return TESTBIT(table, bit);
-}
-
-static void sh_clearbit(char *ptr, int list, unsigned char *table)
-{
- size_t bit;
-
- OPENSSL_assert(list >= 0 && list < sh.freelist_size);
- OPENSSL_assert(((ptr - sh.arena) & ((sh.arena_size >> list) - 1)) == 0);
- bit = (ONE << list) + ((ptr - sh.arena) / (sh.arena_size >> list));
- OPENSSL_assert(bit > 0 && bit < sh.bittable_size);
- OPENSSL_assert(TESTBIT(table, bit));
- CLEARBIT(table, bit);
-}
-
-static void sh_setbit(char *ptr, int list, unsigned char *table)
-{
- size_t bit;
-
- OPENSSL_assert(list >= 0 && list < sh.freelist_size);
- OPENSSL_assert(((ptr - sh.arena) & ((sh.arena_size >> list) - 1)) == 0);
- bit = (ONE << list) + ((ptr - sh.arena) / (sh.arena_size >> list));
- OPENSSL_assert(bit > 0 && bit < sh.bittable_size);
- OPENSSL_assert(!TESTBIT(table, bit));
- SETBIT(table, bit);
-}
-
-static void sh_add_to_list(char **list, char *ptr)
-{
- SH_LIST *temp;
-
- OPENSSL_assert(WITHIN_FREELIST(list));
- OPENSSL_assert(WITHIN_ARENA(ptr));
-
- temp = (SH_LIST *)ptr;
- temp->next = *(SH_LIST **)list;
- OPENSSL_assert(temp->next == NULL || WITHIN_ARENA(temp->next));
- temp->p_next = (SH_LIST **)list;
-
- if (temp->next != NULL) {
- OPENSSL_assert((char **)temp->next->p_next == list);
- temp->next->p_next = &(temp->next);
- }
-
- *list = ptr;
-}
-
-static void sh_remove_from_list(char *ptr)
-{
- SH_LIST *temp, *temp2;
-
- temp = (SH_LIST *)ptr;
- if (temp->next != NULL)
- temp->next->p_next = temp->p_next;
- *temp->p_next = temp->next;
- if (temp->next == NULL)
- return;
-
- temp2 = temp->next;
- OPENSSL_assert(WITHIN_FREELIST(temp2->p_next) || WITHIN_ARENA(temp2->p_next));
-}
-
-
-static int sh_init(size_t size, int minsize)
-{
- int i, ret;
- size_t pgsize;
- size_t aligned;
-
- memset(&sh, 0, sizeof sh);
-
- /* make sure size and minsize are powers of 2 */
- OPENSSL_assert(size > 0);
- OPENSSL_assert((size & (size - 1)) == 0);
- OPENSSL_assert(minsize > 0);
- OPENSSL_assert((minsize & (minsize - 1)) == 0);
- if (size <= 0 || (size & (size - 1)) != 0)
- goto err;
- if (minsize <= 0 || (minsize & (minsize - 1)) != 0)
- goto err;
-
- sh.arena_size = size;
- sh.minsize = minsize;
- sh.bittable_size = (sh.arena_size / sh.minsize) * 2;
-
- /* Prevent allocations of size 0 later on */
- if (sh.bittable_size >> 3 == 0)
- goto err;
-
- sh.freelist_size = -1;
- for (i = sh.bittable_size; i; i >>= 1)
- sh.freelist_size++;
-
- sh.freelist = OPENSSL_zalloc(sh.freelist_size * sizeof (char *));
- OPENSSL_assert(sh.freelist != NULL);
- if (sh.freelist == NULL)
- goto err;
-
- sh.bittable = OPENSSL_zalloc(sh.bittable_size >> 3);
- OPENSSL_assert(sh.bittable != NULL);
- if (sh.bittable == NULL)
- goto err;
-
- sh.bitmalloc = OPENSSL_zalloc(sh.bittable_size >> 3);
- OPENSSL_assert(sh.bitmalloc != NULL);
- if (sh.bitmalloc == NULL)
- goto err;
-
- /* Allocate space for heap, and two extra pages as guards */
-#if defined(_SC_PAGE_SIZE) || defined (_SC_PAGESIZE)
- {
-# if defined(_SC_PAGE_SIZE)
- long tmppgsize = sysconf(_SC_PAGE_SIZE);
-# else
- long tmppgsize = sysconf(_SC_PAGESIZE);
-# endif
- if (tmppgsize < 1)
- pgsize = PAGE_SIZE;
- else
- pgsize = (size_t)tmppgsize;
- }
-#else
- pgsize = PAGE_SIZE;
-#endif
- sh.map_size = pgsize + sh.arena_size + pgsize;
- if (1) {
-#ifdef MAP_ANON
- sh.map_result = mmap(NULL, sh.map_size,
- PROT_READ|PROT_WRITE, MAP_ANON|MAP_PRIVATE, -1, 0);
- } else {
-#endif
- int fd;
-
- sh.map_result = MAP_FAILED;
- if ((fd = open("/dev/zero", O_RDWR)) >= 0) {
- sh.map_result = mmap(NULL, sh.map_size,
- PROT_READ|PROT_WRITE, MAP_PRIVATE, fd, 0);
- close(fd);
- }
- }
- OPENSSL_assert(sh.map_result != MAP_FAILED);
- if (sh.map_result == MAP_FAILED)
- goto err;
- sh.arena = (char *)(sh.map_result + pgsize);
- sh_setbit(sh.arena, 0, sh.bittable);
- sh_add_to_list(&sh.freelist[0], sh.arena);
-
- /* Now try to add guard pages and lock into memory. */
- ret = 1;
-
- /* Starting guard is already aligned from mmap. */
- if (mprotect(sh.map_result, pgsize, PROT_NONE) < 0)
- ret = 2;
-
- /* Ending guard page - need to round up to page boundary */
- aligned = (pgsize + sh.arena_size + (pgsize - 1)) & ~(pgsize - 1);
- if (mprotect(sh.map_result + aligned, pgsize, PROT_NONE) < 0)
- ret = 2;
-
- if (mlock(sh.arena, sh.arena_size) < 0)
- ret = 2;
-#ifdef MADV_DONTDUMP
- if (madvise(sh.arena, sh.arena_size, MADV_DONTDUMP) < 0)
- ret = 2;
-#endif
-
- return ret;
-
- err:
- sh_done();
- return 0;
-}
-
-static void sh_done()
-{
- OPENSSL_free(sh.freelist);
- OPENSSL_free(sh.bittable);
- OPENSSL_free(sh.bitmalloc);
- if (sh.map_result != NULL && sh.map_size)
- munmap(sh.map_result, sh.map_size);
- memset(&sh, 0, sizeof sh);
-}
-
-static int sh_allocated(const char *ptr)
-{
- return WITHIN_ARENA(ptr) ? 1 : 0;
-}
-
-static char *sh_find_my_buddy(char *ptr, int list)
-{
- size_t bit;
- char *chunk = NULL;
-
- bit = (ONE << list) + (ptr - sh.arena) / (sh.arena_size >> list);
- bit ^= 1;
-
- if (TESTBIT(sh.bittable, bit) && !TESTBIT(sh.bitmalloc, bit))
- chunk = sh.arena + ((bit & ((ONE << list) - 1)) * (sh.arena_size >> list));
-
- return chunk;
-}
-
-static char *sh_malloc(size_t size)
-{
- ossl_ssize_t list, slist;
- size_t i;
- char *chunk;
-
- list = sh.freelist_size - 1;
- for (i = sh.minsize; i < size; i <<= 1)
- list--;
- if (list < 0)
- return NULL;
-
- /* try to find a larger entry to split */
- for (slist = list; slist >= 0; slist--)
- if (sh.freelist[slist] != NULL)
- break;
- if (slist < 0)
- return NULL;
-
- /* split larger entry */
- while (slist != list) {
- char *temp = sh.freelist[slist];
-
- /* remove from bigger list */
- OPENSSL_assert(!sh_testbit(temp, slist, sh.bitmalloc));
- sh_clearbit(temp, slist, sh.bittable);
- sh_remove_from_list(temp);
- OPENSSL_assert(temp != sh.freelist[slist]);
-
- /* done with bigger list */
- slist++;
-
- /* add to smaller list */
- OPENSSL_assert(!sh_testbit(temp, slist, sh.bitmalloc));
- sh_setbit(temp, slist, sh.bittable);
- sh_add_to_list(&sh.freelist[slist], temp);
- OPENSSL_assert(sh.freelist[slist] == temp);
-
- /* split in 2 */
- temp += sh.arena_size >> slist;
- OPENSSL_assert(!sh_testbit(temp, slist, sh.bitmalloc));
- sh_setbit(temp, slist, sh.bittable);
- sh_add_to_list(&sh.freelist[slist], temp);
- OPENSSL_assert(sh.freelist[slist] == temp);
-
- OPENSSL_assert(temp-(sh.arena_size >> slist) == sh_find_my_buddy(temp, slist));
- }
-
- /* peel off memory to hand back */
- chunk = sh.freelist[list];
- OPENSSL_assert(sh_testbit(chunk, list, sh.bittable));
- sh_setbit(chunk, list, sh.bitmalloc);
- sh_remove_from_list(chunk);
-
- OPENSSL_assert(WITHIN_ARENA(chunk));
-
- return chunk;
-}
-
-static void sh_free(char *ptr)
-{
- size_t list;
- char *buddy;
-
- if (ptr == NULL)
- return;
- OPENSSL_assert(WITHIN_ARENA(ptr));
- if (!WITHIN_ARENA(ptr))
- return;
-
- list = sh_getlist(ptr);
- OPENSSL_assert(sh_testbit(ptr, list, sh.bittable));
- sh_clearbit(ptr, list, sh.bitmalloc);
- sh_add_to_list(&sh.freelist[list], ptr);
-
- /* Try to coalesce two adjacent free areas. */
- while ((buddy = sh_find_my_buddy(ptr, list)) != NULL) {
- OPENSSL_assert(ptr == sh_find_my_buddy(buddy, list));
- OPENSSL_assert(ptr != NULL);
- OPENSSL_assert(!sh_testbit(ptr, list, sh.bitmalloc));
- sh_clearbit(ptr, list, sh.bittable);
- sh_remove_from_list(ptr);
- OPENSSL_assert(!sh_testbit(ptr, list, sh.bitmalloc));
- sh_clearbit(buddy, list, sh.bittable);
- sh_remove_from_list(buddy);
-
- list--;
-
- if (ptr > buddy)
- ptr = buddy;
-
- OPENSSL_assert(!sh_testbit(ptr, list, sh.bitmalloc));
- sh_setbit(ptr, list, sh.bittable);
- sh_add_to_list(&sh.freelist[list], ptr);
- OPENSSL_assert(sh.freelist[list] == ptr);
- }
-}
-
-static size_t sh_actual_size(char *ptr)
-{
- int list;
-
- OPENSSL_assert(WITHIN_ARENA(ptr));
- if (!WITHIN_ARENA(ptr))
- return 0;
- list = sh_getlist(ptr);
- OPENSSL_assert(sh_testbit(ptr, list, sh.bittable));
- return sh.arena_size / (ONE << list);
-}
-#endif /* IMPLEMENTED */
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