diff options
Diffstat (limited to 'fs/cifs/smbdes.c')
| -rw-r--r-- | fs/cifs/smbdes.c | 418 |
1 files changed, 0 insertions, 418 deletions
diff --git a/fs/cifs/smbdes.c b/fs/cifs/smbdes.c deleted file mode 100644 index 0472148..0000000 --- a/fs/cifs/smbdes.c +++ /dev/null @@ -1,418 +0,0 @@ -/* - Unix SMB/Netbios implementation. - Version 1.9. - - a partial implementation of DES designed for use in the - SMB authentication protocol - - Copyright (C) Andrew Tridgell 1998 - Modified by Steve French (sfrench@us.ibm.com) 2002,2004 - - 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. -*/ - -/* NOTES: - - This code makes no attempt to be fast! In fact, it is a very - slow implementation - - This code is NOT a complete DES implementation. It implements only - the minimum necessary for SMB authentication, as used by all SMB - products (including every copy of Microsoft Windows95 ever sold) - - In particular, it can only do a unchained forward DES pass. This - means it is not possible to use this code for encryption/decryption - of data, instead it is only useful as a "hash" algorithm. - - There is no entry point into this code that allows normal DES operation. - - I believe this means that this code does not come under ITAR - regulations but this is NOT a legal opinion. If you are concerned - about the applicability of ITAR regulations to this code then you - should confirm it for yourself (and maybe let me know if you come - up with a different answer to the one above) -*/ -#include <linux/slab.h> -#define uchar unsigned char - -static uchar perm1[56] = { 57, 49, 41, 33, 25, 17, 9, - 1, 58, 50, 42, 34, 26, 18, - 10, 2, 59, 51, 43, 35, 27, - 19, 11, 3, 60, 52, 44, 36, - 63, 55, 47, 39, 31, 23, 15, - 7, 62, 54, 46, 38, 30, 22, - 14, 6, 61, 53, 45, 37, 29, - 21, 13, 5, 28, 20, 12, 4 -}; - -static uchar perm2[48] = { 14, 17, 11, 24, 1, 5, - 3, 28, 15, 6, 21, 10, - 23, 19, 12, 4, 26, 8, - 16, 7, 27, 20, 13, 2, - 41, 52, 31, 37, 47, 55, - 30, 40, 51, 45, 33, 48, - 44, 49, 39, 56, 34, 53, - 46, 42, 50, 36, 29, 32 -}; - -static uchar perm3[64] = { 58, 50, 42, 34, 26, 18, 10, 2, - 60, 52, 44, 36, 28, 20, 12, 4, - 62, 54, 46, 38, 30, 22, 14, 6, - 64, 56, 48, 40, 32, 24, 16, 8, - 57, 49, 41, 33, 25, 17, 9, 1, - 59, 51, 43, 35, 27, 19, 11, 3, - 61, 53, 45, 37, 29, 21, 13, 5, - 63, 55, 47, 39, 31, 23, 15, 7 -}; - -static uchar perm4[48] = { 32, 1, 2, 3, 4, 5, - 4, 5, 6, 7, 8, 9, - 8, 9, 10, 11, 12, 13, - 12, 13, 14, 15, 16, 17, - 16, 17, 18, 19, 20, 21, - 20, 21, 22, 23, 24, 25, - 24, 25, 26, 27, 28, 29, - 28, 29, 30, 31, 32, 1 -}; - -static uchar perm5[32] = { 16, 7, 20, 21, - 29, 12, 28, 17, - 1, 15, 23, 26, - 5, 18, 31, 10, - 2, 8, 24, 14, - 32, 27, 3, 9, - 19, 13, 30, 6, - 22, 11, 4, 25 -}; - -static uchar perm6[64] = { 40, 8, 48, 16, 56, 24, 64, 32, - 39, 7, 47, 15, 55, 23, 63, 31, - 38, 6, 46, 14, 54, 22, 62, 30, - 37, 5, 45, 13, 53, 21, 61, 29, - 36, 4, 44, 12, 52, 20, 60, 28, - 35, 3, 43, 11, 51, 19, 59, 27, - 34, 2, 42, 10, 50, 18, 58, 26, - 33, 1, 41, 9, 49, 17, 57, 25 -}; - -static uchar sc[16] = { 1, 1, 2, 2, 2, 2, 2, 2, 1, 2, 2, 2, 2, 2, 2, 1 }; - -static uchar sbox[8][4][16] = { - {{14, 4, 13, 1, 2, 15, 11, 8, 3, 10, 6, 12, 5, 9, 0, 7}, - {0, 15, 7, 4, 14, 2, 13, 1, 10, 6, 12, 11, 9, 5, 3, 8}, - {4, 1, 14, 8, 13, 6, 2, 11, 15, 12, 9, 7, 3, 10, 5, 0}, - {15, 12, 8, 2, 4, 9, 1, 7, 5, 11, 3, 14, 10, 0, 6, 13} }, - - {{15, 1, 8, 14, 6, 11, 3, 4, 9, 7, 2, 13, 12, 0, 5, 10}, - {3, 13, 4, 7, 15, 2, 8, 14, 12, 0, 1, 10, 6, 9, 11, 5}, - {0, 14, 7, 11, 10, 4, 13, 1, 5, 8, 12, 6, 9, 3, 2, 15}, - {13, 8, 10, 1, 3, 15, 4, 2, 11, 6, 7, 12, 0, 5, 14, 9} }, - - {{10, 0, 9, 14, 6, 3, 15, 5, 1, 13, 12, 7, 11, 4, 2, 8}, - {13, 7, 0, 9, 3, 4, 6, 10, 2, 8, 5, 14, 12, 11, 15, 1}, - {13, 6, 4, 9, 8, 15, 3, 0, 11, 1, 2, 12, 5, 10, 14, 7}, - {1, 10, 13, 0, 6, 9, 8, 7, 4, 15, 14, 3, 11, 5, 2, 12} }, - - {{7, 13, 14, 3, 0, 6, 9, 10, 1, 2, 8, 5, 11, 12, 4, 15}, - {13, 8, 11, 5, 6, 15, 0, 3, 4, 7, 2, 12, 1, 10, 14, 9}, - {10, 6, 9, 0, 12, 11, 7, 13, 15, 1, 3, 14, 5, 2, 8, 4}, - {3, 15, 0, 6, 10, 1, 13, 8, 9, 4, 5, 11, 12, 7, 2, 14} }, - - {{2, 12, 4, 1, 7, 10, 11, 6, 8, 5, 3, 15, 13, 0, 14, 9}, - {14, 11, 2, 12, 4, 7, 13, 1, 5, 0, 15, 10, 3, 9, 8, 6}, - {4, 2, 1, 11, 10, 13, 7, 8, 15, 9, 12, 5, 6, 3, 0, 14}, - {11, 8, 12, 7, 1, 14, 2, 13, 6, 15, 0, 9, 10, 4, 5, 3} }, - - {{12, 1, 10, 15, 9, 2, 6, 8, 0, 13, 3, 4, 14, 7, 5, 11}, - {10, 15, 4, 2, 7, 12, 9, 5, 6, 1, 13, 14, 0, 11, 3, 8}, - {9, 14, 15, 5, 2, 8, 12, 3, 7, 0, 4, 10, 1, 13, 11, 6}, - {4, 3, 2, 12, 9, 5, 15, 10, 11, 14, 1, 7, 6, 0, 8, 13} }, - - {{4, 11, 2, 14, 15, 0, 8, 13, 3, 12, 9, 7, 5, 10, 6, 1}, - {13, 0, 11, 7, 4, 9, 1, 10, 14, 3, 5, 12, 2, 15, 8, 6}, - {1, 4, 11, 13, 12, 3, 7, 14, 10, 15, 6, 8, 0, 5, 9, 2}, - {6, 11, 13, 8, 1, 4, 10, 7, 9, 5, 0, 15, 14, 2, 3, 12} }, - - {{13, 2, 8, 4, 6, 15, 11, 1, 10, 9, 3, 14, 5, 0, 12, 7}, - {1, 15, 13, 8, 10, 3, 7, 4, 12, 5, 6, 11, 0, 14, 9, 2}, - {7, 11, 4, 1, 9, 12, 14, 2, 0, 6, 10, 13, 15, 3, 5, 8}, - {2, 1, 14, 7, 4, 10, 8, 13, 15, 12, 9, 0, 3, 5, 6, 11} } -}; - -static void -permute(char *out, char *in, uchar *p, int n) -{ - int i; - for (i = 0; i < n; i++) - out[i] = in[p[i] - 1]; -} - -static void -lshift(char *d, int count, int n) -{ - char out[64]; - int i; - for (i = 0; i < n; i++) - out[i] = d[(i + count) % n]; - for (i = 0; i < n; i++) - d[i] = out[i]; -} - -static void -concat(char *out, char *in1, char *in2, int l1, int l2) -{ - while (l1--) - *out++ = *in1++; - while (l2--) - *out++ = *in2++; -} - -static void -xor(char *out, char *in1, char *in2, int n) -{ - int i; - for (i = 0; i < n; i++) - out[i] = in1[i] ^ in2[i]; -} - -static void -dohash(char *out, char *in, char *key, int forw) -{ - int i, j, k; - char *pk1; - char c[28]; - char d[28]; - char *cd; - char (*ki)[48]; - char *pd1; - char l[32], r[32]; - char *rl; - - /* Have to reduce stack usage */ - pk1 = kmalloc(56+56+64+64, GFP_KERNEL); - if (pk1 == NULL) - return; - - ki = kmalloc(16*48, GFP_KERNEL); - if (ki == NULL) { - kfree(pk1); - return; - } - - cd = pk1 + 56; - pd1 = cd + 56; - rl = pd1 + 64; - - permute(pk1, key, perm1, 56); - - for (i = 0; i < 28; i++) - c[i] = pk1[i]; - for (i = 0; i < 28; i++) - d[i] = pk1[i + 28]; - - for (i = 0; i < 16; i++) { - lshift(c, sc[i], 28); - lshift(d, sc[i], 28); - - concat(cd, c, d, 28, 28); - permute(ki[i], cd, perm2, 48); - } - - permute(pd1, in, perm3, 64); - - for (j = 0; j < 32; j++) { - l[j] = pd1[j]; - r[j] = pd1[j + 32]; - } - - for (i = 0; i < 16; i++) { - char *er; /* er[48] */ - char *erk; /* erk[48] */ - char b[8][6]; - char *cb; /* cb[32] */ - char *pcb; /* pcb[32] */ - char *r2; /* r2[32] */ - - er = kmalloc(48+48+32+32+32, GFP_KERNEL); - if (er == NULL) { - kfree(pk1); - kfree(ki); - return; - } - erk = er+48; - cb = erk+48; - pcb = cb+32; - r2 = pcb+32; - - permute(er, r, perm4, 48); - - xor(erk, er, ki[forw ? i : 15 - i], 48); - - for (j = 0; j < 8; j++) - for (k = 0; k < 6; k++) - b[j][k] = erk[j * 6 + k]; - - for (j = 0; j < 8; j++) { - int m, n; - m = (b[j][0] << 1) | b[j][5]; - - n = (b[j][1] << 3) | (b[j][2] << 2) | (b[j][3] << - 1) | b[j][4]; - - for (k = 0; k < 4; k++) - b[j][k] = - (sbox[j][m][n] & (1 << (3 - k))) ? 1 : 0; - } - - for (j = 0; j < 8; j++) - for (k = 0; k < 4; k++) - cb[j * 4 + k] = b[j][k]; - permute(pcb, cb, perm5, 32); - - xor(r2, l, pcb, 32); - - for (j = 0; j < 32; j++) - l[j] = r[j]; - - for (j = 0; j < 32; j++) - r[j] = r2[j]; - - kfree(er); - } - - concat(rl, r, l, 32, 32); - - permute(out, rl, perm6, 64); - kfree(pk1); - kfree(ki); -} - -static void -str_to_key(unsigned char *str, unsigned char *key) -{ - int i; - - key[0] = str[0] >> 1; - key[1] = ((str[0] & 0x01) << 6) | (str[1] >> 2); - key[2] = ((str[1] & 0x03) << 5) | (str[2] >> 3); - key[3] = ((str[2] & 0x07) << 4) | (str[3] >> 4); - key[4] = ((str[3] & 0x0F) << 3) | (str[4] >> 5); - key[5] = ((str[4] & 0x1F) << 2) | (str[5] >> 6); - key[6] = ((str[5] & 0x3F) << 1) | (str[6] >> 7); - key[7] = str[6] & 0x7F; - for (i = 0; i < 8; i++) - key[i] = (key[i] << 1); -} - -static void -smbhash(unsigned char *out, const unsigned char *in, unsigned char *key, - int forw) -{ - int i; - char *outb; /* outb[64] */ - char *inb; /* inb[64] */ - char *keyb; /* keyb[64] */ - unsigned char key2[8]; - - outb = kmalloc(64 * 3, GFP_KERNEL); - if (outb == NULL) - return; - - inb = outb + 64; - keyb = inb + 64; - - str_to_key(key, key2); - - for (i = 0; i < 64; i++) { - inb[i] = (in[i / 8] & (1 << (7 - (i % 8)))) ? 1 : 0; - keyb[i] = (key2[i / 8] & (1 << (7 - (i % 8)))) ? 1 : 0; - outb[i] = 0; - } - - dohash(outb, inb, keyb, forw); - - for (i = 0; i < 8; i++) - out[i] = 0; - - for (i = 0; i < 64; i++) { - if (outb[i]) - out[i / 8] |= (1 << (7 - (i % 8))); - } - kfree(outb); -} - -void -E_P16(unsigned char *p14, unsigned char *p16) -{ - unsigned char sp8[8] = - { 0x4b, 0x47, 0x53, 0x21, 0x40, 0x23, 0x24, 0x25 }; - smbhash(p16, sp8, p14, 1); - smbhash(p16 + 8, sp8, p14 + 7, 1); -} - -void -E_P24(unsigned char *p21, const unsigned char *c8, unsigned char *p24) -{ - smbhash(p24, c8, p21, 1); - smbhash(p24 + 8, c8, p21 + 7, 1); - smbhash(p24 + 16, c8, p21 + 14, 1); -} - -#if 0 /* currently unused */ -static void -D_P16(unsigned char *p14, unsigned char *in, unsigned char *out) -{ - smbhash(out, in, p14, 0); - smbhash(out + 8, in + 8, p14 + 7, 0); -} - -static void -E_old_pw_hash(unsigned char *p14, unsigned char *in, unsigned char *out) -{ - smbhash(out, in, p14, 1); - smbhash(out + 8, in + 8, p14 + 7, 1); -} -/* these routines are currently unneeded, but may be - needed later */ -void -cred_hash1(unsigned char *out, unsigned char *in, unsigned char *key) -{ - unsigned char buf[8]; - - smbhash(buf, in, key, 1); - smbhash(out, buf, key + 9, 1); -} - -void -cred_hash2(unsigned char *out, unsigned char *in, unsigned char *key) -{ - unsigned char buf[8]; - static unsigned char key2[8]; - - smbhash(buf, in, key, 1); - key2[0] = key[7]; - smbhash(out, buf, key2, 1); -} - -void -cred_hash3(unsigned char *out, unsigned char *in, unsigned char *key, int forw) -{ - static unsigned char key2[8]; - - smbhash(out, in, key, forw); - key2[0] = key[7]; - smbhash(out + 8, in + 8, key2, forw); -} -#endif /* unneeded routines */ |