first public release of samba4 code

(This used to be commit b0510b5428b3461aeb9bbe3cc95f62fc73e2b97f)

1 files changed, 175 insertions, 0 deletions

diff --git a/source4/lib/crypto/md4.c b/source4/lib/crypto/md4.c
new file mode 100644
index 0000000000..417e87bd8e
--- /dev/null
+++ b/source4/lib/crypto/md4.c
@@ -0,0 +1,175 @@
+/* 
+   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
+*/
+
+struct mdfour_state {
+	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(struct mdfour_state *s, uint32 *M)
+{
+	int j;
+	uint32 AA, BB, CC, DD;
+	uint32 X[16];
+
+	for (j=0;j<16;j++)
+		X[j] = M[j];
+
+	AA = s->A; BB = s->B; CC = s->C; DD = s->D;
+
+        ROUND1(s->A,s->B,s->C,s->D,  0,  3);  ROUND1(s->D,s->A,s->B,s->C,  1,  7);  
+	ROUND1(s->C,s->D,s->A,s->B,  2, 11);  ROUND1(s->B,s->C,s->D,s->A,  3, 19);
+        ROUND1(s->A,s->B,s->C,s->D,  4,  3);  ROUND1(s->D,s->A,s->B,s->C,  5,  7);  
+	ROUND1(s->C,s->D,s->A,s->B,  6, 11);  ROUND1(s->B,s->C,s->D,s->A,  7, 19);
+        ROUND1(s->A,s->B,s->C,s->D,  8,  3);  ROUND1(s->D,s->A,s->B,s->C,  9,  7);  
+	ROUND1(s->C,s->D,s->A,s->B, 10, 11);  ROUND1(s->B,s->C,s->D,s->A, 11, 19);
+        ROUND1(s->A,s->B,s->C,s->D, 12,  3);  ROUND1(s->D,s->A,s->B,s->C, 13,  7);  
+	ROUND1(s->C,s->D,s->A,s->B, 14, 11);  ROUND1(s->B,s->C,s->D,s->A, 15, 19);	
+
+        ROUND2(s->A,s->B,s->C,s->D,  0,  3);  ROUND2(s->D,s->A,s->B,s->C,  4,  5);  
+	ROUND2(s->C,s->D,s->A,s->B,  8,  9);  ROUND2(s->B,s->C,s->D,s->A, 12, 13);
+        ROUND2(s->A,s->B,s->C,s->D,  1,  3);  ROUND2(s->D,s->A,s->B,s->C,  5,  5);  
+	ROUND2(s->C,s->D,s->A,s->B,  9,  9);  ROUND2(s->B,s->C,s->D,s->A, 13, 13);
+        ROUND2(s->A,s->B,s->C,s->D,  2,  3);  ROUND2(s->D,s->A,s->B,s->C,  6,  5);  
+	ROUND2(s->C,s->D,s->A,s->B, 10,  9);  ROUND2(s->B,s->C,s->D,s->A, 14, 13);
+        ROUND2(s->A,s->B,s->C,s->D,  3,  3);  ROUND2(s->D,s->A,s->B,s->C,  7,  5);  
+	ROUND2(s->C,s->D,s->A,s->B, 11,  9);  ROUND2(s->B,s->C,s->D,s->A, 15, 13);
+
+	ROUND3(s->A,s->B,s->C,s->D,  0,  3);  ROUND3(s->D,s->A,s->B,s->C,  8,  9);  
+	ROUND3(s->C,s->D,s->A,s->B,  4, 11);  ROUND3(s->B,s->C,s->D,s->A, 12, 15);
+        ROUND3(s->A,s->B,s->C,s->D,  2,  3);  ROUND3(s->D,s->A,s->B,s->C, 10,  9);  
+	ROUND3(s->C,s->D,s->A,s->B,  6, 11);  ROUND3(s->B,s->C,s->D,s->A, 14, 15);
+        ROUND3(s->A,s->B,s->C,s->D,  1,  3);  ROUND3(s->D,s->A,s->B,s->C,  9,  9);  
+	ROUND3(s->C,s->D,s->A,s->B,  5, 11);  ROUND3(s->B,s->C,s->D,s->A, 13, 15);
+        ROUND3(s->A,s->B,s->C,s->D,  3,  3);  ROUND3(s->D,s->A,s->B,s->C, 11,  9);  
+	ROUND3(s->C,s->D,s->A,s->B,  7, 11);  ROUND3(s->B,s->C,s->D,s->A, 15, 15);
+
+	s->A += AA; 
+	s->B += BB; 
+	s->C += CC; 
+	s->D += DD;
+	
+	s->A &= 0xFFFFFFFF; 
+	s->B &= 0xFFFFFFFF;
+	s->C &= 0xFFFFFFFF; 
+	s->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;
+	struct mdfour_state state;
+
+	state.A = 0x67452301;
+	state.B = 0xefcdab89;
+	state.C = 0x98badcfe;
+	state.D = 0x10325476;
+
+	while (n > 64) {
+		copy64(M, in);
+		mdfour64(&state, 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(&state, M);
+	} else {
+		copy4(buf+120, b); 
+		copy64(M, buf);
+		mdfour64(&state, M);
+		copy64(M, buf+64);
+		mdfour64(&state, M);
+	}
+
+	for (i=0;i<128;i++)
+		buf[i] = 0;
+	copy64(M, buf);
+
+	copy4(out, state.A);
+	copy4(out+4, state.B);
+	copy4(out+8, state.C);
+	copy4(out+12, state.D);
+}
+
+