--- /dev/null
+/*
+ Unix SMB/CIFS implementation.
+ a implementation of MD4 designed for use in the SMB authentication protocol
+ Copyright (C) Andrew Tridgell 1997-1998.
+
+ 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 "includes.h"
+
+/* NOTE: This code makes no attempt to be fast!
+
+ It assumes that a int is at least 32 bits long
+*/
+
+static uint32 A, B, C, D;
+
+static uint32 F(uint32 X, uint32 Y, uint32 Z)
+{
+ return (X&Y) | ((~X)&Z);
+}
+
+static uint32 G(uint32 X, uint32 Y, uint32 Z)
+{
+ return (X&Y) | (X&Z) | (Y&Z);
+}
+
+static uint32 H(uint32 X, uint32 Y, uint32 Z)
+{
+ return X^Y^Z;
+}
+
+static uint32 lshift(uint32 x, int s)
+{
+ x &= 0xFFFFFFFF;
+ return ((x<<s)&0xFFFFFFFF) | (x>>(32-s));
+}
+
+#define ROUND1(a,b,c,d,k,s) a = lshift(a + F(b,c,d) + X[k], s)
+#define ROUND2(a,b,c,d,k,s) a = lshift(a + G(b,c,d) + X[k] + (uint32)0x5A827999,s)
+#define ROUND3(a,b,c,d,k,s) a = lshift(a + H(b,c,d) + X[k] + (uint32)0x6ED9EBA1,s)
+
+/* this applies md4 to 64 byte chunks */
+static void mdfour64(uint32 *M)
+{
+ int j;
+ uint32 AA, BB, CC, DD;
+ uint32 X[16];
+
+ for (j=0;j<16;j++)
+ X[j] = M[j];
+
+ AA = A; BB = B; CC = C; DD = D;
+
+ ROUND1(A,B,C,D, 0, 3); ROUND1(D,A,B,C, 1, 7);
+ ROUND1(C,D,A,B, 2, 11); ROUND1(B,C,D,A, 3, 19);
+ ROUND1(A,B,C,D, 4, 3); ROUND1(D,A,B,C, 5, 7);
+ ROUND1(C,D,A,B, 6, 11); ROUND1(B,C,D,A, 7, 19);
+ ROUND1(A,B,C,D, 8, 3); ROUND1(D,A,B,C, 9, 7);
+ ROUND1(C,D,A,B, 10, 11); ROUND1(B,C,D,A, 11, 19);
+ ROUND1(A,B,C,D, 12, 3); ROUND1(D,A,B,C, 13, 7);
+ ROUND1(C,D,A,B, 14, 11); ROUND1(B,C,D,A, 15, 19);
+
+ ROUND2(A,B,C,D, 0, 3); ROUND2(D,A,B,C, 4, 5);
+ ROUND2(C,D,A,B, 8, 9); ROUND2(B,C,D,A, 12, 13);
+ ROUND2(A,B,C,D, 1, 3); ROUND2(D,A,B,C, 5, 5);
+ ROUND2(C,D,A,B, 9, 9); ROUND2(B,C,D,A, 13, 13);
+ ROUND2(A,B,C,D, 2, 3); ROUND2(D,A,B,C, 6, 5);
+ ROUND2(C,D,A,B, 10, 9); ROUND2(B,C,D,A, 14, 13);
+ ROUND2(A,B,C,D, 3, 3); ROUND2(D,A,B,C, 7, 5);
+ ROUND2(C,D,A,B, 11, 9); ROUND2(B,C,D,A, 15, 13);
+
+ ROUND3(A,B,C,D, 0, 3); ROUND3(D,A,B,C, 8, 9);
+ ROUND3(C,D,A,B, 4, 11); ROUND3(B,C,D,A, 12, 15);
+ ROUND3(A,B,C,D, 2, 3); ROUND3(D,A,B,C, 10, 9);
+ ROUND3(C,D,A,B, 6, 11); ROUND3(B,C,D,A, 14, 15);
+ ROUND3(A,B,C,D, 1, 3); ROUND3(D,A,B,C, 9, 9);
+ ROUND3(C,D,A,B, 5, 11); ROUND3(B,C,D,A, 13, 15);
+ ROUND3(A,B,C,D, 3, 3); ROUND3(D,A,B,C, 11, 9);
+ ROUND3(C,D,A,B, 7, 11); ROUND3(B,C,D,A, 15, 15);
+
+ A += AA; B += BB; C += CC; D += DD;
+
+ A &= 0xFFFFFFFF; B &= 0xFFFFFFFF;
+ C &= 0xFFFFFFFF; D &= 0xFFFFFFFF;
+
+ for (j=0;j<16;j++)
+ X[j] = 0;
+}
+
+static void copy64(uint32 *M, const unsigned char *in)
+{
+ int i;
+
+ for (i=0;i<16;i++)
+ M[i] = (in[i*4+3]<<24) | (in[i*4+2]<<16) |
+ (in[i*4+1]<<8) | (in[i*4+0]<<0);
+}
+
+static void copy4(unsigned char *out, uint32 x)
+{
+ out[0] = x&0xFF;
+ out[1] = (x>>8)&0xFF;
+ out[2] = (x>>16)&0xFF;
+ out[3] = (x>>24)&0xFF;
+}
+
+/* produce a md4 message digest from data of length n bytes */
+void mdfour(unsigned char *out, const unsigned char *in, int n)
+{
+ unsigned char buf[128];
+ uint32 M[16];
+ uint32 b = n * 8;
+ int i;
+
+ A = 0x67452301;
+ B = 0xefcdab89;
+ C = 0x98badcfe;
+ D = 0x10325476;
+
+ while (n > 64) {
+ copy64(M, in);
+ mdfour64(M);
+ in += 64;
+ n -= 64;
+ }
+
+ for (i=0;i<128;i++)
+ buf[i] = 0;
+ memcpy(buf, in, n);
+ buf[n] = 0x80;
+
+ if (n <= 55) {
+ copy4(buf+56, b);
+ copy64(M, buf);
+ mdfour64(M);
+ } else {
+ copy4(buf+120, b);
+ copy64(M, buf);
+ mdfour64(M);
+ copy64(M, buf+64);
+ mdfour64(M);
+ }
+
+ for (i=0;i<128;i++)
+ buf[i] = 0;
+ copy64(M, buf);
+
+ copy4(out, A);
+ copy4(out+4, B);
+ copy4(out+8, C);
+ copy4(out+12, D);
+
+ A = B = C = D = 0;
+}
+
+
projects / samba / blobdiff