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Diffstat (limited to 'fs/cifs/smbencrypt.c')
| -rw-r--r-- | fs/cifs/smbencrypt.c | 285 |
1 files changed, 285 insertions, 0 deletions
diff --git a/fs/cifs/smbencrypt.c b/fs/cifs/smbencrypt.c new file mode 100644 index 0000000..6103bcd --- /dev/null +++ b/fs/cifs/smbencrypt.c @@ -0,0 +1,285 @@ +/* + 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 |
