1*38c8a9a5SSteve French // SPDX-License-Identifier: GPL-2.0-or-later 2*38c8a9a5SSteve French /* 3*38c8a9a5SSteve French Unix SMB/Netbios implementation. 4*38c8a9a5SSteve French Version 1.9. 5*38c8a9a5SSteve French SMB parameters and setup 6*38c8a9a5SSteve French Copyright (C) Andrew Tridgell 1992-2000 7*38c8a9a5SSteve French Copyright (C) Luke Kenneth Casson Leighton 1996-2000 8*38c8a9a5SSteve French Modified by Jeremy Allison 1995. 9*38c8a9a5SSteve French Copyright (C) Andrew Bartlett <abartlet@samba.org> 2002-2003 10*38c8a9a5SSteve French Modified by Steve French (sfrench@us.ibm.com) 2002-2003 11*38c8a9a5SSteve French 12*38c8a9a5SSteve French */ 13*38c8a9a5SSteve French 14*38c8a9a5SSteve French #include <linux/module.h> 15*38c8a9a5SSteve French #include <linux/slab.h> 16*38c8a9a5SSteve French #include <linux/fips.h> 17*38c8a9a5SSteve French #include <linux/fs.h> 18*38c8a9a5SSteve French #include <linux/string.h> 19*38c8a9a5SSteve French #include <linux/kernel.h> 20*38c8a9a5SSteve French #include <linux/random.h> 21*38c8a9a5SSteve French #include "cifs_fs_sb.h" 22*38c8a9a5SSteve French #include "cifs_unicode.h" 23*38c8a9a5SSteve French #include "cifspdu.h" 24*38c8a9a5SSteve French #include "cifsglob.h" 25*38c8a9a5SSteve French #include "cifs_debug.h" 26*38c8a9a5SSteve French #include "cifsproto.h" 27*38c8a9a5SSteve French #include "../common/md4.h" 28*38c8a9a5SSteve French 29*38c8a9a5SSteve French #ifndef false 30*38c8a9a5SSteve French #define false 0 31*38c8a9a5SSteve French #endif 32*38c8a9a5SSteve French #ifndef true 33*38c8a9a5SSteve French #define true 1 34*38c8a9a5SSteve French #endif 35*38c8a9a5SSteve French 36*38c8a9a5SSteve French /* following came from the other byteorder.h to avoid include conflicts */ 37*38c8a9a5SSteve French #define CVAL(buf,pos) (((unsigned char *)(buf))[pos]) 38*38c8a9a5SSteve French #define SSVALX(buf,pos,val) (CVAL(buf,pos)=(val)&0xFF,CVAL(buf,pos+1)=(val)>>8) 39*38c8a9a5SSteve French #define SSVAL(buf,pos,val) SSVALX((buf),(pos),((__u16)(val))) 40*38c8a9a5SSteve French 41*38c8a9a5SSteve French /* produce a md4 message digest from data of length n bytes */ 42*38c8a9a5SSteve French static int 43*38c8a9a5SSteve French mdfour(unsigned char *md4_hash, unsigned char *link_str, int link_len) 44*38c8a9a5SSteve French { 45*38c8a9a5SSteve French int rc; 46*38c8a9a5SSteve French struct md4_ctx mctx; 47*38c8a9a5SSteve French 48*38c8a9a5SSteve French rc = cifs_md4_init(&mctx); 49*38c8a9a5SSteve French if (rc) { 50*38c8a9a5SSteve French cifs_dbg(VFS, "%s: Could not init MD4\n", __func__); 51*38c8a9a5SSteve French goto mdfour_err; 52*38c8a9a5SSteve French } 53*38c8a9a5SSteve French rc = cifs_md4_update(&mctx, link_str, link_len); 54*38c8a9a5SSteve French if (rc) { 55*38c8a9a5SSteve French cifs_dbg(VFS, "%s: Could not update MD4\n", __func__); 56*38c8a9a5SSteve French goto mdfour_err; 57*38c8a9a5SSteve French } 58*38c8a9a5SSteve French rc = cifs_md4_final(&mctx, md4_hash); 59*38c8a9a5SSteve French if (rc) 60*38c8a9a5SSteve French cifs_dbg(VFS, "%s: Could not finalize MD4\n", __func__); 61*38c8a9a5SSteve French 62*38c8a9a5SSteve French 63*38c8a9a5SSteve French mdfour_err: 64*38c8a9a5SSteve French return rc; 65*38c8a9a5SSteve French } 66*38c8a9a5SSteve French 67*38c8a9a5SSteve French /* 68*38c8a9a5SSteve French * Creates the MD4 Hash of the users password in NT UNICODE. 69*38c8a9a5SSteve French */ 70*38c8a9a5SSteve French 71*38c8a9a5SSteve French int 72*38c8a9a5SSteve French E_md4hash(const unsigned char *passwd, unsigned char *p16, 73*38c8a9a5SSteve French const struct nls_table *codepage) 74*38c8a9a5SSteve French { 75*38c8a9a5SSteve French int rc; 76*38c8a9a5SSteve French int len; 77*38c8a9a5SSteve French __le16 wpwd[129]; 78*38c8a9a5SSteve French 79*38c8a9a5SSteve French /* Password cannot be longer than 128 characters */ 80*38c8a9a5SSteve French if (passwd) /* Password must be converted to NT unicode */ 81*38c8a9a5SSteve French len = cifs_strtoUTF16(wpwd, passwd, 128, codepage); 82*38c8a9a5SSteve French else { 83*38c8a9a5SSteve French len = 0; 84*38c8a9a5SSteve French *wpwd = 0; /* Ensure string is null terminated */ 85*38c8a9a5SSteve French } 86*38c8a9a5SSteve French 87*38c8a9a5SSteve French rc = mdfour(p16, (unsigned char *) wpwd, len * sizeof(__le16)); 88*38c8a9a5SSteve French memzero_explicit(wpwd, sizeof(wpwd)); 89*38c8a9a5SSteve French 90*38c8a9a5SSteve French return rc; 91*38c8a9a5SSteve French } 92