/* 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 "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, const unsigned char *c8, unsigned char *p24); void E_md4hash(const unsigned char *passwd, unsigned char *p16); static void SMBOWFencrypt(unsigned char passwd[16], const unsigned char *c8, 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, const 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) { /* BB 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); } #if 0 /* currently unused */ /* Does both the NT and LM owfs of a user's password */ static 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)); } #endif /* 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], const 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. */ #if 0 /* currently unused */ static 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); } #endif /* 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