151 lines
4.4 KiB
C
151 lines
4.4 KiB
C
/****************************************************************************
|
|
* apps/fsutils/passwd/passwd_encrypt.c
|
|
*
|
|
* Copyright (C) 2016 Gregory Nutt. All rights reserved.
|
|
* Author: Gregory Nutt <gnutt@nuttx.org>
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
*
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in
|
|
* the documentation and/or other materials provided with the
|
|
* distribution.
|
|
* 3. Neither the name NuttX nor the names of its contributors may be
|
|
* used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
|
|
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
|
|
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
|
|
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
|
|
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
|
|
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
|
|
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
* POSSIBILITY OF SUCH DAMAGE.
|
|
*
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Included Files
|
|
****************************************************************************/
|
|
|
|
#include <nuttx/config.h>
|
|
|
|
#include <stdint.h>
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <errno.h>
|
|
|
|
#include <nuttx/crypto/tea.h>
|
|
|
|
#include "passwd.h"
|
|
|
|
/****************************************************************************
|
|
* Private Data
|
|
****************************************************************************/
|
|
/* This should be better protected */
|
|
|
|
static uint32_t g_tea_key[4] =
|
|
{
|
|
CONFIG_FSUTILS_PASSWD_KEY1,
|
|
CONFIG_FSUTILS_PASSWD_KEY2,
|
|
CONFIG_FSUTILS_PASSWD_KEY3,
|
|
CONFIG_FSUTILS_PASSWD_KEY4
|
|
};
|
|
|
|
/****************************************************************************
|
|
* Public Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Name: passwd_encrypt
|
|
*
|
|
* Description:
|
|
* Encrypt a password. Currently uses the Tiny Encryption Algorithm.
|
|
*
|
|
* Input Parameters:
|
|
* password -- The password string to be encrypted
|
|
*
|
|
* Returned Value:
|
|
* Zero (OK) is returned on success; a negated errno value is returned on
|
|
* failure.
|
|
*
|
|
****************************************************************************/
|
|
|
|
int passwd_encrypt(FAR const char *password, char encrypted[MAX_ENCRYPTED + 1])
|
|
{
|
|
union
|
|
{
|
|
char b[8];
|
|
uint32_t l[2];
|
|
} value;
|
|
|
|
FAR const char *src;
|
|
FAR char *dest;
|
|
int remaining;
|
|
int converted;
|
|
int enclen;
|
|
int gulpsize;
|
|
int i;
|
|
|
|
/* How long is the password? */
|
|
|
|
remaining = strlen(password);
|
|
if (remaining > MAX_PASSWORD)
|
|
{
|
|
return -E2BIG;
|
|
}
|
|
|
|
/* Convert the password in 8-byte TEA cycles */
|
|
|
|
src = password;
|
|
encrypted[0] = '\0';
|
|
enclen = 0;
|
|
|
|
for (converted = 0; converted < remaining; converted += 8)
|
|
{
|
|
/* Copy bytes */
|
|
|
|
gulpsize = 8;
|
|
if (gulpsize > remaining)
|
|
{
|
|
gulpsize = remaining;
|
|
}
|
|
|
|
dest = value.b;
|
|
for (i = 0; i < gulpsize; i++)
|
|
{
|
|
*dest++ = *src++;
|
|
}
|
|
|
|
/* Pad with spaces if necessary */
|
|
|
|
for (; i < 8; i++)
|
|
{
|
|
*dest++ = ' ';
|
|
}
|
|
|
|
/* Perform the conversion for this cycle */
|
|
|
|
tea_encrypt(value.l, g_tea_key);
|
|
|
|
/* Generate the output from this cycle */
|
|
|
|
enclen += snprintf(&encrypted[enclen],
|
|
MAX_ENCRYPTED - enclen,
|
|
"%08lx%08lx",
|
|
(unsigned long)value.l[0],
|
|
(unsigned long)value.l[1]);
|
|
}
|
|
|
|
return OK;
|
|
}
|