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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /fs/cifs/smbencrypt.c
downloadop-kernel-dev-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.zip
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Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'fs/cifs/smbencrypt.c')
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1 files changed, 285 insertions, 0 deletions
diff --git a/fs/cifs/smbencrypt.c b/fs/cifs/smbencrypt.c
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+++ b/fs/cifs/smbencrypt.c
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+/*
+ 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/fs.h>
+#include <linux/string.h>
+#include <linux/kernel.h>
+#include <linux/random.h>
+#include "cifs_unicode.h"
+#include "cifspdu.h"
+#include "md5.h"
+#include "cifs_debug.h"
+#include "cifsencrypt.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)))
+
+/*The following definitions come from libsmb/smbencrypt.c */
+
+void SMBencrypt(unsigned char *passwd, unsigned char *c8, unsigned char *p24);
+void E_md4hash(const unsigned char *passwd, unsigned char *p16);
+void nt_lm_owf_gen(char *pwd, unsigned char nt_p16[16], unsigned char p16[16]);
+static void SMBOWFencrypt(unsigned char passwd[16], unsigned char *c8,
+ unsigned char p24[24]);
+void NTLMSSPOWFencrypt(unsigned char passwd[8],
+ unsigned char *ntlmchalresp, unsigned char p24[24]);
+void SMBNTencrypt(unsigned char *passwd, unsigned char *c8, unsigned char *p24);
+
+/*
+ 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 */
+void
+SMBencrypt(unsigned char *passwd, unsigned char *c8, unsigned char *p24)
+{
+ unsigned char p14[15], p21[21];
+
+ memset(p21, '\0', 21);
+ memset(p14, '\0', 14);
+ strncpy((char *) p14, (char *) passwd, 14);
+
+/* strupper((char *)p14); *//* BB at least uppercase the easy range */
+ E_P16(p14, p21);
+
+ SMBOWFencrypt(p21, c8, p24);
+
+ memset(p14,0,15);
+ memset(p21,0,21);
+}
+
+/* Routines for Windows NT MD4 Hash functions. */
+static int
+_my_wcslen(__u16 * str)
+{
+ int len = 0;
+ while (*str++ != 0)
+ len++;
+ return len;
+}
+
+/*
+ * Convert a string into an NT UNICODE string.
+ * Note that regardless of processor type
+ * this must be in intel (little-endian)
+ * format.
+ */
+
+static int
+_my_mbstowcs(__u16 * dst, const unsigned char *src, int len)
+{ /* not a very good conversion routine - change/fix */
+ int i;
+ __u16 val;
+
+ for (i = 0; i < len; i++) {
+ val = *src;
+ SSVAL(dst, 0, val);
+ dst++;
+ src++;
+ if (val == 0)
+ break;
+ }
+ return i;
+}
+
+/*
+ * Creates the MD4 Hash of the users password in NT UNICODE.
+ */
+
+void
+E_md4hash(const unsigned char *passwd, unsigned char *p16)
+{
+ int len;
+ __u16 wpwd[129];
+
+ /* Password cannot be longer than 128 characters */
+ if(passwd) {
+ len = strlen((char *) passwd);
+ if (len > 128) {
+ len = 128;
+ }
+ /* Password must be converted to NT unicode */
+ _my_mbstowcs(wpwd, passwd, len);
+ } else
+ len = 0;
+
+ wpwd[len] = 0; /* Ensure string is null terminated */
+ /* Calculate length in bytes */
+ len = _my_wcslen(wpwd) * sizeof (__u16);
+
+ mdfour(p16, (unsigned char *) wpwd, len);
+ memset(wpwd,0,129 * 2);
+}
+
+/* Does both the NT and LM owfs of a user's password */
+void
+nt_lm_owf_gen(char *pwd, unsigned char nt_p16[16], unsigned char p16[16])
+{
+ char passwd[514];
+
+ memset(passwd, '\0', 514);
+ if (strlen(pwd) < 513)
+ strcpy(passwd, pwd);
+ else
+ memcpy(passwd, pwd, 512);
+ /* Calculate the MD4 hash (NT compatible) of the password */
+ memset(nt_p16, '\0', 16);
+ E_md4hash(passwd, nt_p16);
+
+ /* Mangle the passwords into Lanman format */
+ passwd[14] = '\0';
+/* strupper(passwd); */
+
+ /* Calculate the SMB (lanman) hash functions of the password */
+
+ memset(p16, '\0', 16);
+ E_P16((unsigned char *) passwd, (unsigned char *) p16);
+
+ /* clear out local copy of user's password (just being paranoid). */
+ memset(passwd, '\0', sizeof (passwd));
+}
+
+/* Does the NTLMv2 owfs of a user's password */
+#if 0 /* function not needed yet - but will be soon */
+static void
+ntv2_owf_gen(const unsigned char owf[16], const char *user_n,
+ const char *domain_n, unsigned char kr_buf[16],
+ const struct nls_table *nls_codepage)
+{
+ wchar_t * user_u;
+ wchar_t * dom_u;
+ int user_l, domain_l;
+ struct HMACMD5Context ctx;
+
+ /* might as well do one alloc to hold both (user_u and dom_u) */
+ user_u = kmalloc(2048 * sizeof(wchar_t),GFP_KERNEL);
+ if(user_u == NULL)
+ return;
+ dom_u = user_u + 1024;
+
+ /* push_ucs2(NULL, user_u, user_n, (user_l+1)*2, STR_UNICODE|STR_NOALIGN|STR_TERMINATE|STR_UPPER);
+ push_ucs2(NULL, dom_u, domain_n, (domain_l+1)*2, STR_UNICODE|STR_NOALIGN|STR_TERMINATE|STR_UPPER); */
+
+ /* BB user and domain may need to be uppercased */
+ user_l = cifs_strtoUCS(user_u, user_n, 511, nls_codepage);
+ domain_l = cifs_strtoUCS(dom_u, domain_n, 511, nls_codepage);
+
+ user_l++; /* trailing null */
+ domain_l++;
+
+ hmac_md5_init_limK_to_64(owf, 16, &ctx);
+ hmac_md5_update((const unsigned char *) user_u, user_l * 2, &ctx);
+ hmac_md5_update((const unsigned char *) dom_u, domain_l * 2, &ctx);
+ hmac_md5_final(kr_buf, &ctx);
+
+ kfree(user_u);
+}
+#endif
+
+/* Does the des encryption from the NT or LM MD4 hash. */
+static void
+SMBOWFencrypt(unsigned char passwd[16], unsigned char *c8,
+ unsigned char p24[24])
+{
+ unsigned char p21[21];
+
+ memset(p21, '\0', 21);
+
+ memcpy(p21, passwd, 16);
+ E_P24(p21, c8, p24);
+}
+
+/* Does the des encryption from the FIRST 8 BYTES of the NT or LM MD4 hash. */
+void
+NTLMSSPOWFencrypt(unsigned char passwd[8],
+ unsigned char *ntlmchalresp, unsigned char p24[24])
+{
+ unsigned char p21[21];
+
+ memset(p21, '\0', 21);
+ memcpy(p21, passwd, 8);
+ memset(p21 + 8, 0xbd, 8);
+
+ E_P24(p21, ntlmchalresp, p24);
+}
+
+/* Does the NT MD4 hash then des encryption. */
+
+void
+SMBNTencrypt(unsigned char *passwd, unsigned char *c8, unsigned char *p24)
+{
+ unsigned char p21[21];
+
+ memset(p21, '\0', 21);
+
+ E_md4hash(passwd, p21);
+ SMBOWFencrypt(p21, c8, p24);
+}
+
+
+/* Does the md5 encryption from the NT hash for NTLMv2. */
+/* These routines will be needed later */
+#if 0
+static void
+SMBOWFencrypt_ntv2(const unsigned char kr[16],
+ const struct data_blob * srv_chal,
+ const struct data_blob * cli_chal, unsigned char resp_buf[16])
+{
+ struct HMACMD5Context ctx;
+
+ hmac_md5_init_limK_to_64(kr, 16, &ctx);
+ hmac_md5_update(srv_chal->data, srv_chal->length, &ctx);
+ hmac_md5_update(cli_chal->data, cli_chal->length, &ctx);
+ hmac_md5_final(resp_buf, &ctx);
+}
+
+static void
+SMBsesskeygen_ntv2(const unsigned char kr[16],
+ const unsigned char *nt_resp, __u8 sess_key[16])
+{
+ struct HMACMD5Context ctx;
+
+ hmac_md5_init_limK_to_64(kr, 16, &ctx);
+ hmac_md5_update(nt_resp, 16, &ctx);
+ hmac_md5_final((unsigned char *) sess_key, &ctx);
+}
+
+static void
+SMBsesskeygen_ntv1(const unsigned char kr[16],
+ const unsigned char *nt_resp, __u8 sess_key[16])
+{
+ mdfour((unsigned char *) sess_key, (unsigned char *) kr, 16);
+}
+#endif
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