mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-26 19:00:25 +00:00
![Jeff Layton](/assets/img/avatar_default.png)
Those macros add a newline on their own, so there's not any need to embed one in the message itself. Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <smfrench@gmail.com>
247 lines
6 KiB
C
247 lines
6 KiB
C
/*
|
|
Unix SMB/Netbios implementation.
|
|
Version 1.9.
|
|
SMB parameters and setup
|
|
Copyright (C) Andrew Tridgell 1992-2000
|
|
Copyright (C) Luke Kenneth Casson Leighton 1996-2000
|
|
Modified by Jeremy Allison 1995.
|
|
Copyright (C) Andrew Bartlett <abartlet@samba.org> 2002-2003
|
|
Modified by Steve French (sfrench@us.ibm.com) 2002-2003
|
|
|
|
This program is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 2 of the License, or
|
|
(at your option) any later version.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program; if not, write to the Free Software
|
|
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/fs.h>
|
|
#include <linux/string.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/random.h>
|
|
#include "cifs_unicode.h"
|
|
#include "cifspdu.h"
|
|
#include "cifsglob.h"
|
|
#include "cifs_debug.h"
|
|
#include "cifsproto.h"
|
|
|
|
#ifndef false
|
|
#define false 0
|
|
#endif
|
|
#ifndef true
|
|
#define true 1
|
|
#endif
|
|
|
|
/* following came from the other byteorder.h to avoid include conflicts */
|
|
#define CVAL(buf,pos) (((unsigned char *)(buf))[pos])
|
|
#define SSVALX(buf,pos,val) (CVAL(buf,pos)=(val)&0xFF,CVAL(buf,pos+1)=(val)>>8)
|
|
#define SSVAL(buf,pos,val) SSVALX((buf),(pos),((__u16)(val)))
|
|
|
|
static void
|
|
str_to_key(unsigned char *str, unsigned char *key)
|
|
{
|
|
int i;
|
|
|
|
key[0] = str[0] >> 1;
|
|
key[1] = ((str[0] & 0x01) << 6) | (str[1] >> 2);
|
|
key[2] = ((str[1] & 0x03) << 5) | (str[2] >> 3);
|
|
key[3] = ((str[2] & 0x07) << 4) | (str[3] >> 4);
|
|
key[4] = ((str[3] & 0x0F) << 3) | (str[4] >> 5);
|
|
key[5] = ((str[4] & 0x1F) << 2) | (str[5] >> 6);
|
|
key[6] = ((str[5] & 0x3F) << 1) | (str[6] >> 7);
|
|
key[7] = str[6] & 0x7F;
|
|
for (i = 0; i < 8; i++)
|
|
key[i] = (key[i] << 1);
|
|
}
|
|
|
|
static int
|
|
smbhash(unsigned char *out, const unsigned char *in, unsigned char *key)
|
|
{
|
|
int rc;
|
|
unsigned char key2[8];
|
|
struct crypto_blkcipher *tfm_des;
|
|
struct scatterlist sgin, sgout;
|
|
struct blkcipher_desc desc;
|
|
|
|
str_to_key(key, key2);
|
|
|
|
tfm_des = crypto_alloc_blkcipher("ecb(des)", 0, CRYPTO_ALG_ASYNC);
|
|
if (IS_ERR(tfm_des)) {
|
|
rc = PTR_ERR(tfm_des);
|
|
cERROR(1, "could not allocate des crypto API");
|
|
goto smbhash_err;
|
|
}
|
|
|
|
desc.tfm = tfm_des;
|
|
|
|
crypto_blkcipher_setkey(tfm_des, key2, 8);
|
|
|
|
sg_init_one(&sgin, in, 8);
|
|
sg_init_one(&sgout, out, 8);
|
|
|
|
rc = crypto_blkcipher_encrypt(&desc, &sgout, &sgin, 8);
|
|
if (rc)
|
|
cERROR(1, "could not encrypt crypt key rc: %d", rc);
|
|
|
|
crypto_free_blkcipher(tfm_des);
|
|
smbhash_err:
|
|
return rc;
|
|
}
|
|
|
|
static int
|
|
E_P16(unsigned char *p14, unsigned char *p16)
|
|
{
|
|
int rc;
|
|
unsigned char sp8[8] =
|
|
{ 0x4b, 0x47, 0x53, 0x21, 0x40, 0x23, 0x24, 0x25 };
|
|
|
|
rc = smbhash(p16, sp8, p14);
|
|
if (rc)
|
|
return rc;
|
|
rc = smbhash(p16 + 8, sp8, p14 + 7);
|
|
return rc;
|
|
}
|
|
|
|
static int
|
|
E_P24(unsigned char *p21, const unsigned char *c8, unsigned char *p24)
|
|
{
|
|
int rc;
|
|
|
|
rc = smbhash(p24, c8, p21);
|
|
if (rc)
|
|
return rc;
|
|
rc = smbhash(p24 + 8, c8, p21 + 7);
|
|
if (rc)
|
|
return rc;
|
|
rc = smbhash(p24 + 16, c8, p21 + 14);
|
|
return rc;
|
|
}
|
|
|
|
/* produce a md4 message digest from data of length n bytes */
|
|
int
|
|
mdfour(unsigned char *md4_hash, unsigned char *link_str, int link_len)
|
|
{
|
|
int rc;
|
|
unsigned int size;
|
|
struct crypto_shash *md4;
|
|
struct sdesc *sdescmd4;
|
|
|
|
md4 = crypto_alloc_shash("md4", 0, 0);
|
|
if (IS_ERR(md4)) {
|
|
rc = PTR_ERR(md4);
|
|
cERROR(1, "%s: Crypto md4 allocation error %d", __func__, rc);
|
|
return rc;
|
|
}
|
|
size = sizeof(struct shash_desc) + crypto_shash_descsize(md4);
|
|
sdescmd4 = kmalloc(size, GFP_KERNEL);
|
|
if (!sdescmd4) {
|
|
rc = -ENOMEM;
|
|
cERROR(1, "%s: Memory allocation failure", __func__);
|
|
goto mdfour_err;
|
|
}
|
|
sdescmd4->shash.tfm = md4;
|
|
sdescmd4->shash.flags = 0x0;
|
|
|
|
rc = crypto_shash_init(&sdescmd4->shash);
|
|
if (rc) {
|
|
cERROR(1, "%s: Could not init md4 shash", __func__);
|
|
goto mdfour_err;
|
|
}
|
|
rc = crypto_shash_update(&sdescmd4->shash, link_str, link_len);
|
|
if (rc) {
|
|
cERROR(1, "%s: Could not update with link_str", __func__);
|
|
goto mdfour_err;
|
|
}
|
|
rc = crypto_shash_final(&sdescmd4->shash, md4_hash);
|
|
if (rc)
|
|
cERROR(1, "%s: Could not genereate md4 hash", __func__);
|
|
|
|
mdfour_err:
|
|
crypto_free_shash(md4);
|
|
kfree(sdescmd4);
|
|
|
|
return rc;
|
|
}
|
|
|
|
/*
|
|
This implements the X/Open SMB password encryption
|
|
It takes a password, a 8 byte "crypt key" and puts 24 bytes of
|
|
encrypted password into p24 */
|
|
/* Note that password must be uppercased and null terminated */
|
|
int
|
|
SMBencrypt(unsigned char *passwd, const unsigned char *c8, unsigned char *p24)
|
|
{
|
|
int rc;
|
|
unsigned char p14[14], p16[16], p21[21];
|
|
|
|
memset(p14, '\0', 14);
|
|
memset(p16, '\0', 16);
|
|
memset(p21, '\0', 21);
|
|
|
|
memcpy(p14, passwd, 14);
|
|
rc = E_P16(p14, p16);
|
|
if (rc)
|
|
return rc;
|
|
|
|
memcpy(p21, p16, 16);
|
|
rc = E_P24(p21, c8, p24);
|
|
|
|
return rc;
|
|
}
|
|
|
|
/*
|
|
* Creates the MD4 Hash of the users password in NT UNICODE.
|
|
*/
|
|
|
|
int
|
|
E_md4hash(const unsigned char *passwd, unsigned char *p16,
|
|
const struct nls_table *codepage)
|
|
{
|
|
int rc;
|
|
int len;
|
|
__le16 wpwd[129];
|
|
|
|
/* Password cannot be longer than 128 characters */
|
|
if (passwd) /* Password must be converted to NT unicode */
|
|
len = cifs_strtoUTF16(wpwd, passwd, 128, codepage);
|
|
else {
|
|
len = 0;
|
|
*wpwd = 0; /* Ensure string is null terminated */
|
|
}
|
|
|
|
rc = mdfour(p16, (unsigned char *) wpwd, len * sizeof(__le16));
|
|
memset(wpwd, 0, 129 * sizeof(__le16));
|
|
|
|
return rc;
|
|
}
|
|
|
|
/* Does the NT MD4 hash then des encryption. */
|
|
int
|
|
SMBNTencrypt(unsigned char *passwd, unsigned char *c8, unsigned char *p24,
|
|
const struct nls_table *codepage)
|
|
{
|
|
int rc;
|
|
unsigned char p16[16], p21[21];
|
|
|
|
memset(p16, '\0', 16);
|
|
memset(p21, '\0', 21);
|
|
|
|
rc = E_md4hash(passwd, p16, codepage);
|
|
if (rc) {
|
|
cFYI(1, "%s Can't generate NT hash, error: %d", __func__, rc);
|
|
return rc;
|
|
}
|
|
memcpy(p21, p16, 16);
|
|
rc = E_P24(p21, c8, p24);
|
|
return rc;
|
|
}
|