* Copyright 2015-2018 The OpenSSL Project Authors. All Rights Reserved.
* Copyright 2004-2014, Akamai Technologies. All Rights Reserved.
*
- * Licensed under the OpenSSL license (the "License"). You may not use
+ * Licensed under the Apache License 2.0 (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
#include <string.h>
-/* e_os.h includes unistd.h, which defines _POSIX_VERSION */
-#if !defined(OPENSSL_NO_SECURE_MEMORY) && defined(OPENSSL_SYS_UNIX) \
- && ( (defined(_POSIX_VERSION) && _POSIX_VERSION >= 200112L) \
- || defined(__sun) || defined(__hpux) || defined(__sgi) \
- || defined(__osf__) )
-# define IMPLEMENTED
+/* e_os.h defines OPENSSL_SECURE_MEMORY if secure memory can be implemented */
+#ifdef OPENSSL_SECURE_MEMORY
# include <stdlib.h>
# include <assert.h>
# include <unistd.h>
# include <sys/mman.h>
# if defined(OPENSSL_SYS_LINUX)
# include <sys/syscall.h>
-# include <linux/mman.h>
-# include <errno.h>
+# if defined(SYS_mlock2)
+# include <linux/mman.h>
+# include <errno.h>
+# endif
# endif
# include <sys/param.h>
# include <sys/stat.h>
#ifndef PAGE_SIZE
# define PAGE_SIZE 4096
#endif
+#if !defined(MAP_ANON) && defined(MAP_ANONYMOUS)
+# define MAP_ANON MAP_ANONYMOUS
+#endif
-#ifdef IMPLEMENTED
+#ifdef OPENSSL_SECURE_MEMORY
static size_t secure_mem_used;
static int secure_mem_initialized;
int CRYPTO_secure_malloc_init(size_t size, int minsize)
{
-#ifdef IMPLEMENTED
+#ifdef OPENSSL_SECURE_MEMORY
int ret = 0;
if (!secure_mem_initialized) {
return ret;
#else
return 0;
-#endif /* IMPLEMENTED */
+#endif /* OPENSSL_SECURE_MEMORY */
}
-int CRYPTO_secure_malloc_done()
+int CRYPTO_secure_malloc_done(void)
{
-#ifdef IMPLEMENTED
+#ifdef OPENSSL_SECURE_MEMORY
if (secure_mem_used == 0) {
sh_done();
secure_mem_initialized = 0;
sec_malloc_lock = NULL;
return 1;
}
-#endif /* IMPLEMENTED */
+#endif /* OPENSSL_SECURE_MEMORY */
return 0;
}
-int CRYPTO_secure_malloc_initialized()
+int CRYPTO_secure_malloc_initialized(void)
{
-#ifdef IMPLEMENTED
+#ifdef OPENSSL_SECURE_MEMORY
return secure_mem_initialized;
#else
return 0;
-#endif /* IMPLEMENTED */
+#endif /* OPENSSL_SECURE_MEMORY */
}
void *CRYPTO_secure_malloc(size_t num, const char *file, int line)
{
-#ifdef IMPLEMENTED
+#ifdef OPENSSL_SECURE_MEMORY
void *ret;
size_t actual_size;
return ret;
#else
return CRYPTO_malloc(num, file, line);
-#endif /* IMPLEMENTED */
+#endif /* OPENSSL_SECURE_MEMORY */
}
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;
+#ifdef OPENSSL_SECURE_MEMORY
+ if (secure_mem_initialized)
+ /* CRYPTO_secure_malloc() zeroes allocations when it is implemented */
+ return CRYPTO_secure_malloc(num, file, line);
+#endif
+ return CRYPTO_zalloc(num, file, line);
}
void CRYPTO_secure_free(void *ptr, const char *file, int line)
{
-#ifdef IMPLEMENTED
+#ifdef OPENSSL_SECURE_MEMORY
size_t actual_size;
if (ptr == NULL)
CRYPTO_THREAD_unlock(sec_malloc_lock);
#else
CRYPTO_free(ptr, file, line);
-#endif /* IMPLEMENTED */
+#endif /* OPENSSL_SECURE_MEMORY */
}
void CRYPTO_secure_clear_free(void *ptr, size_t num,
const char *file, int line)
{
-#ifdef IMPLEMENTED
+#ifdef OPENSSL_SECURE_MEMORY
size_t actual_size;
if (ptr == NULL)
return;
OPENSSL_cleanse(ptr, num);
CRYPTO_free(ptr, file, line);
-#endif /* IMPLEMENTED */
+#endif /* OPENSSL_SECURE_MEMORY */
}
int CRYPTO_secure_allocated(const void *ptr)
{
-#ifdef IMPLEMENTED
+#ifdef OPENSSL_SECURE_MEMORY
int ret;
if (!secure_mem_initialized)
return ret;
#else
return 0;
-#endif /* IMPLEMENTED */
+#endif /* OPENSSL_SECURE_MEMORY */
}
-size_t CRYPTO_secure_used()
+size_t CRYPTO_secure_used(void)
{
-#ifdef IMPLEMENTED
+#ifdef OPENSSL_SECURE_MEMORY
return secure_mem_used;
#else
return 0;
-#endif /* IMPLEMENTED */
+#endif /* OPENSSL_SECURE_MEMORY */
}
size_t CRYPTO_secure_actual_size(void *ptr)
{
-#ifdef IMPLEMENTED
+#ifdef OPENSSL_SECURE_MEMORY
size_t actual_size;
CRYPTO_THREAD_write_lock(sec_malloc_lock);
/*
* SECURE HEAP IMPLEMENTATION
*/
-#ifdef IMPLEMENTED
+#ifdef OPENSSL_SECURE_MEMORY
/*
return 0;
}
-static void sh_done()
+static void sh_done(void)
{
OPENSSL_free(sh.freelist);
OPENSSL_free(sh.bittable);
OPENSSL_assert(WITHIN_ARENA(chunk));
+ /* zero the free list header as a precaution against information leakage */
+ memset(chunk, 0, sizeof(SH_LIST));
+
return chunk;
}
list--;
+ /* Zero the higher addressed block's free list pointers */
+ memset(ptr > buddy ? ptr : buddy, 0, sizeof(SH_LIST));
if (ptr > buddy)
ptr = buddy;
OPENSSL_assert(sh_testbit(ptr, list, sh.bittable));
return sh.arena_size / (ONE << list);
}
-#endif /* IMPLEMENTED */
+#endif /* OPENSSL_SECURE_MEMORY */