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-rw-r--r--fs/cifs/smbdes.c412
1 files changed, 412 insertions, 0 deletions
diff --git a/fs/cifs/smbdes.c b/fs/cifs/smbdes.c
new file mode 100644
index 00000000000..efaa044523a
--- /dev/null
+++ b/fs/cifs/smbdes.c
@@ -0,0 +1,412 @@
+/*
+ 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>
+#include "cifsencrypt.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[16][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;
+
+ 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);
+ 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);
+}
+
+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, 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, 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);
+}
+
+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);
+}
+
+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);
+}
+#if 0
+/* 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 */
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