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![Tejun Heo](/assets/img/avatar_default.png)
percpu.h is included by sched.h and module.h and thus ends up being included when building most .c files. percpu.h includes slab.h which in turn includes gfp.h making everything defined by the two files universally available and complicating inclusion dependencies. percpu.h -> slab.h dependency is about to be removed. Prepare for this change by updating users of gfp and slab facilities include those headers directly instead of assuming availability. As this conversion needs to touch large number of source files, the following script is used as the basis of conversion. http://userweb.kernel.org/~tj/misc/slabh-sweep.py The script does the followings. * Scan files for gfp and slab usages and update includes such that only the necessary includes are there. ie. if only gfp is used, gfp.h, if slab is used, slab.h. * When the script inserts a new include, it looks at the include blocks and try to put the new include such that its order conforms to its surrounding. It's put in the include block which contains core kernel includes, in the same order that the rest are ordered - alphabetical, Christmas tree, rev-Xmas-tree or at the end if there doesn't seem to be any matching order. * If the script can't find a place to put a new include (mostly because the file doesn't have fitting include block), it prints out an error message indicating which .h file needs to be added to the file. The conversion was done in the following steps. 1. The initial automatic conversion of all .c files updated slightly over 4000 files, deleting around 700 includes and adding ~480 gfp.h and ~3000 slab.h inclusions. The script emitted errors for ~400 files. 2. Each error was manually checked. Some didn't need the inclusion, some needed manual addition while adding it to implementation .h or embedding .c file was more appropriate for others. This step added inclusions to around 150 files. 3. The script was run again and the output was compared to the edits from #2 to make sure no file was left behind. 4. Several build tests were done and a couple of problems were fixed. e.g. lib/decompress_*.c used malloc/free() wrappers around slab APIs requiring slab.h to be added manually. 5. The script was run on all .h files but without automatically editing them as sprinkling gfp.h and slab.h inclusions around .h files could easily lead to inclusion dependency hell. Most gfp.h inclusion directives were ignored as stuff from gfp.h was usually wildly available and often used in preprocessor macros. Each slab.h inclusion directive was examined and added manually as necessary. 6. percpu.h was updated not to include slab.h. 7. Build test were done on the following configurations and failures were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my distributed build env didn't work with gcov compiles) and a few more options had to be turned off depending on archs to make things build (like ipr on powerpc/64 which failed due to missing writeq). * x86 and x86_64 UP and SMP allmodconfig and a custom test config. * powerpc and powerpc64 SMP allmodconfig * sparc and sparc64 SMP allmodconfig * ia64 SMP allmodconfig * s390 SMP allmodconfig * alpha SMP allmodconfig * um on x86_64 SMP allmodconfig 8. percpu.h modifications were reverted so that it could be applied as a separate patch and serve as bisection point. Given the fact that I had only a couple of failures from tests on step 6, I'm fairly confident about the coverage of this conversion patch. If there is a breakage, it's likely to be something in one of the arch headers which should be easily discoverable easily on most builds of the specific arch. Signed-off-by: Tejun Heo <tj@kernel.org> Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
291 lines
7.5 KiB
C
291 lines
7.5 KiB
C
/*
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Unix SMB/Netbios implementation.
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Version 1.9.
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SMB parameters and setup
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Copyright (C) Andrew Tridgell 1992-2000
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Copyright (C) Luke Kenneth Casson Leighton 1996-2000
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Modified by Jeremy Allison 1995.
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Copyright (C) Andrew Bartlett <abartlet@samba.org> 2002-2003
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Modified by Steve French (sfrench@us.ibm.com) 2002-2003
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/fs.h>
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#include <linux/string.h>
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#include <linux/kernel.h>
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#include <linux/random.h>
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#include "cifs_unicode.h"
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#include "cifspdu.h"
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#include "cifsglob.h"
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#include "md5.h"
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#include "cifs_debug.h"
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#include "cifsencrypt.h"
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#ifndef false
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#define false 0
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#endif
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#ifndef true
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#define true 1
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#endif
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/* following came from the other byteorder.h to avoid include conflicts */
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#define CVAL(buf,pos) (((unsigned char *)(buf))[pos])
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#define SSVALX(buf,pos,val) (CVAL(buf,pos)=(val)&0xFF,CVAL(buf,pos+1)=(val)>>8)
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#define SSVAL(buf,pos,val) SSVALX((buf),(pos),((__u16)(val)))
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/*The following definitions come from libsmb/smbencrypt.c */
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void SMBencrypt(unsigned char *passwd, const unsigned char *c8,
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unsigned char *p24);
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void E_md4hash(const unsigned char *passwd, unsigned char *p16);
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static void SMBOWFencrypt(unsigned char passwd[16], const unsigned char *c8,
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unsigned char p24[24]);
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void SMBNTencrypt(unsigned char *passwd, unsigned char *c8, unsigned char *p24);
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/*
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This implements the X/Open SMB password encryption
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It takes a password, a 8 byte "crypt key" and puts 24 bytes of
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encrypted password into p24 */
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/* Note that password must be uppercased and null terminated */
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void
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SMBencrypt(unsigned char *passwd, const unsigned char *c8, unsigned char *p24)
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{
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unsigned char p14[15], p21[21];
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memset(p21, '\0', 21);
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memset(p14, '\0', 14);
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strncpy((char *) p14, (char *) passwd, 14);
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/* strupper((char *)p14); *//* BB at least uppercase the easy range */
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E_P16(p14, p21);
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SMBOWFencrypt(p21, c8, p24);
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memset(p14, 0, 15);
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memset(p21, 0, 21);
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}
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/* Routines for Windows NT MD4 Hash functions. */
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static int
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_my_wcslen(__u16 *str)
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{
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int len = 0;
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while (*str++ != 0)
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len++;
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return len;
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}
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/*
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* Convert a string into an NT UNICODE string.
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* Note that regardless of processor type
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* this must be in intel (little-endian)
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* format.
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*/
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static int
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_my_mbstowcs(__u16 *dst, const unsigned char *src, int len)
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{ /* BB not a very good conversion routine - change/fix */
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int i;
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__u16 val;
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for (i = 0; i < len; i++) {
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val = *src;
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SSVAL(dst, 0, val);
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dst++;
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src++;
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if (val == 0)
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break;
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}
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return i;
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}
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/*
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* Creates the MD4 Hash of the users password in NT UNICODE.
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*/
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void
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E_md4hash(const unsigned char *passwd, unsigned char *p16)
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{
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int len;
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__u16 wpwd[129];
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/* Password cannot be longer than 128 characters */
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if (passwd) {
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len = strlen((char *) passwd);
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if (len > 128)
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len = 128;
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/* Password must be converted to NT unicode */
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_my_mbstowcs(wpwd, passwd, len);
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} else
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len = 0;
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wpwd[len] = 0; /* Ensure string is null terminated */
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/* Calculate length in bytes */
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len = _my_wcslen(wpwd) * sizeof(__u16);
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mdfour(p16, (unsigned char *) wpwd, len);
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memset(wpwd, 0, 129 * 2);
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}
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#if 0 /* currently unused */
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/* Does both the NT and LM owfs of a user's password */
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static void
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nt_lm_owf_gen(char *pwd, unsigned char nt_p16[16], unsigned char p16[16])
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{
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char passwd[514];
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memset(passwd, '\0', 514);
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if (strlen(pwd) < 513)
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strcpy(passwd, pwd);
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else
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memcpy(passwd, pwd, 512);
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/* Calculate the MD4 hash (NT compatible) of the password */
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memset(nt_p16, '\0', 16);
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E_md4hash(passwd, nt_p16);
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/* Mangle the passwords into Lanman format */
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passwd[14] = '\0';
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/* strupper(passwd); */
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/* Calculate the SMB (lanman) hash functions of the password */
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memset(p16, '\0', 16);
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E_P16((unsigned char *) passwd, (unsigned char *) p16);
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/* clear out local copy of user's password (just being paranoid). */
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memset(passwd, '\0', sizeof(passwd));
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}
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#endif
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/* Does the NTLMv2 owfs of a user's password */
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#if 0 /* function not needed yet - but will be soon */
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static void
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ntv2_owf_gen(const unsigned char owf[16], const char *user_n,
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const char *domain_n, unsigned char kr_buf[16],
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const struct nls_table *nls_codepage)
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{
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wchar_t *user_u;
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wchar_t *dom_u;
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int user_l, domain_l;
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struct HMACMD5Context ctx;
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/* might as well do one alloc to hold both (user_u and dom_u) */
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user_u = kmalloc(2048 * sizeof(wchar_t), GFP_KERNEL);
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if (user_u == NULL)
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return;
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dom_u = user_u + 1024;
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/* push_ucs2(NULL, user_u, user_n, (user_l+1)*2,
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STR_UNICODE|STR_NOALIGN|STR_TERMINATE|STR_UPPER);
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push_ucs2(NULL, dom_u, domain_n, (domain_l+1)*2,
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STR_UNICODE|STR_NOALIGN|STR_TERMINATE|STR_UPPER); */
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/* BB user and domain may need to be uppercased */
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user_l = cifs_strtoUCS(user_u, user_n, 511, nls_codepage);
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domain_l = cifs_strtoUCS(dom_u, domain_n, 511, nls_codepage);
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user_l++; /* trailing null */
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domain_l++;
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hmac_md5_init_limK_to_64(owf, 16, &ctx);
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hmac_md5_update((const unsigned char *) user_u, user_l * 2, &ctx);
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hmac_md5_update((const unsigned char *) dom_u, domain_l * 2, &ctx);
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hmac_md5_final(kr_buf, &ctx);
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kfree(user_u);
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}
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#endif
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/* Does the des encryption from the NT or LM MD4 hash. */
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static void
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SMBOWFencrypt(unsigned char passwd[16], const unsigned char *c8,
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unsigned char p24[24])
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{
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unsigned char p21[21];
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memset(p21, '\0', 21);
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memcpy(p21, passwd, 16);
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E_P24(p21, c8, p24);
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}
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/* Does the des encryption from the FIRST 8 BYTES of the NT or LM MD4 hash. */
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#if 0 /* currently unused */
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static void
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NTLMSSPOWFencrypt(unsigned char passwd[8],
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unsigned char *ntlmchalresp, unsigned char p24[24])
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{
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unsigned char p21[21];
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memset(p21, '\0', 21);
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memcpy(p21, passwd, 8);
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memset(p21 + 8, 0xbd, 8);
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E_P24(p21, ntlmchalresp, p24);
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}
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#endif
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/* Does the NT MD4 hash then des encryption. */
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void
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SMBNTencrypt(unsigned char *passwd, unsigned char *c8, unsigned char *p24)
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{
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unsigned char p21[21];
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memset(p21, '\0', 21);
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E_md4hash(passwd, p21);
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SMBOWFencrypt(p21, c8, p24);
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}
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/* Does the md5 encryption from the NT hash for NTLMv2. */
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/* These routines will be needed later */
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#if 0
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static void
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SMBOWFencrypt_ntv2(const unsigned char kr[16],
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const struct data_blob *srv_chal,
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const struct data_blob *cli_chal, unsigned char resp_buf[16])
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{
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struct HMACMD5Context ctx;
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hmac_md5_init_limK_to_64(kr, 16, &ctx);
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hmac_md5_update(srv_chal->data, srv_chal->length, &ctx);
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hmac_md5_update(cli_chal->data, cli_chal->length, &ctx);
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hmac_md5_final(resp_buf, &ctx);
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}
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static void
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SMBsesskeygen_ntv2(const unsigned char kr[16],
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const unsigned char *nt_resp, __u8 sess_key[16])
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{
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struct HMACMD5Context ctx;
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hmac_md5_init_limK_to_64(kr, 16, &ctx);
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hmac_md5_update(nt_resp, 16, &ctx);
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hmac_md5_final((unsigned char *) sess_key, &ctx);
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}
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static void
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SMBsesskeygen_ntv1(const unsigned char kr[16],
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const unsigned char *nt_resp, __u8 sess_key[16])
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{
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mdfour((unsigned char *) sess_key, (unsigned char *) kr, 16);
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}
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#endif
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