hostapd/src/utils/os_none.c
Jouni Malinen afc3c8b07f Add constant time memory comparison function os_memcmp_const
This function is meant for comparing passwords or hash values where
difference in execution time could provide external observer information
about the location of the difference in the memory buffers. The return
value does not behave like os_memcmp(), i.e., os_memcmp_const() cannot
be used to sort items into a defined order. Unlike os_memcmp(),
execution time of os_memcmp_const() does not depend on the contents of
the compared memory buffers, but only on the total compared length.

Signed-off-by: Jouni Malinen <j@w1.fi>
2014-07-02 12:38:47 +03:00

236 lines
3.2 KiB
C

/*
* wpa_supplicant/hostapd / Empty OS specific functions
* Copyright (c) 2005-2006, Jouni Malinen <j@w1.fi>
*
* This software may be distributed under the terms of the BSD license.
* See README for more details.
*
* This file can be used as a starting point when adding a new OS target. The
* functions here do not really work as-is since they are just empty or only
* return an error value. os_internal.c can be used as another starting point
* or reference since it has example implementation of many of these functions.
*/
#include "includes.h"
#include "os.h"
void os_sleep(os_time_t sec, os_time_t usec)
{
}
int os_get_time(struct os_time *t)
{
return -1;
}
int os_get_reltime(struct os_reltime *t)
{
return -1;
}
int os_mktime(int year, int month, int day, int hour, int min, int sec,
os_time_t *t)
{
return -1;
}
int os_gmtime(os_time_t t, struct os_tm *tm)
{
return -1;
}
int os_daemonize(const char *pid_file)
{
return -1;
}
void os_daemonize_terminate(const char *pid_file)
{
}
int os_get_random(unsigned char *buf, size_t len)
{
return -1;
}
unsigned long os_random(void)
{
return 0;
}
char * os_rel2abs_path(const char *rel_path)
{
return NULL; /* strdup(rel_path) can be used here */
}
int os_program_init(void)
{
return 0;
}
void os_program_deinit(void)
{
}
int os_setenv(const char *name, const char *value, int overwrite)
{
return -1;
}
int os_unsetenv(const char *name)
{
return -1;
}
char * os_readfile(const char *name, size_t *len)
{
return NULL;
}
void * os_zalloc(size_t size)
{
return NULL;
}
#ifdef OS_NO_C_LIB_DEFINES
void * os_malloc(size_t size)
{
return NULL;
}
void * os_realloc(void *ptr, size_t size)
{
return NULL;
}
void os_free(void *ptr)
{
}
void * os_memcpy(void *dest, const void *src, size_t n)
{
return dest;
}
void * os_memmove(void *dest, const void *src, size_t n)
{
return dest;
}
void * os_memset(void *s, int c, size_t n)
{
return s;
}
int os_memcmp(const void *s1, const void *s2, size_t n)
{
return 0;
}
char * os_strdup(const char *s)
{
return NULL;
}
size_t os_strlen(const char *s)
{
return 0;
}
int os_strcasecmp(const char *s1, const char *s2)
{
/*
* Ignoring case is not required for main functionality, so just use
* the case sensitive version of the function.
*/
return os_strcmp(s1, s2);
}
int os_strncasecmp(const char *s1, const char *s2, size_t n)
{
/*
* Ignoring case is not required for main functionality, so just use
* the case sensitive version of the function.
*/
return os_strncmp(s1, s2, n);
}
char * os_strchr(const char *s, int c)
{
return NULL;
}
char * os_strrchr(const char *s, int c)
{
return NULL;
}
int os_strcmp(const char *s1, const char *s2)
{
return 0;
}
int os_strncmp(const char *s1, const char *s2, size_t n)
{
return 0;
}
char * os_strncpy(char *dest, const char *src, size_t n)
{
return dest;
}
size_t os_strlcpy(char *dest, const char *src, size_t size)
{
return 0;
}
int os_memcmp_const(const void *a, const void *b, size_t len)
{
return 0;
}
char * os_strstr(const char *haystack, const char *needle)
{
return NULL;
}
int os_snprintf(char *str, size_t size, const char *format, ...)
{
return 0;
}
#endif /* OS_NO_C_LIB_DEFINES */