OpenVAS Libraries  9.0.3
md4.c
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1 /*
2  Unix SMB/CIFS implementation.
3  a implementation of MD4 designed for use in the SMB authentication protocol
4  Copyright (C) Andrew Tridgell 1997-1998.
5 
6  This program is free software; you can redistribute it and/or modify
7  it under the terms of the GNU General Public License as published by
8  the Free Software Foundation; either version 2 of the License, or
9  (at your option) any later version.
10 
11  This program is distributed in the hope that it will be useful,
12  but WITHOUT ANY WARRANTY; without even the implied warranty of
13  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14  GNU General Public License for more details.
15 
16  You should have received a copy of the GNU General Public License
17  along with this program; if not, write to the Free Software
18  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
19 */
20 
21 #include <stdint.h>
22 #include <string.h>
23 #include "md4.h"
24 
25 #ifndef uint32
26 #define uint32 uint32_t
27 #endif
28 
29 /* NOTE: This code makes no attempt to be fast!
30 
31  It assumes that a int is at least 32 bits long
32 */
33 
34 static uint32 A, B, C, D;
35 
36 static uint32 F(uint32 X, uint32 Y, uint32 Z)
37 {
38  return (X&Y) | ((~X)&Z);
39 }
40 
41 static uint32 G(uint32 X, uint32 Y, uint32 Z)
42 {
43  return (X&Y) | (X&Z) | (Y&Z);
44 }
45 
46 static uint32 H(uint32 X, uint32 Y, uint32 Z)
47 {
48  return X^Y^Z;
49 }
50 
51 static uint32 lshift(uint32 x, int s)
52 {
53  x &= 0xFFFFFFFF;
54  return ((x<<s)&0xFFFFFFFF) | (x>>(32-s));
55 }
56 
57 #define ROUND1(a,b,c,d,k,s) a = lshift(a + F(b,c,d) + X[k], s)
58 #define ROUND2(a,b,c,d,k,s) a = lshift(a + G(b,c,d) + X[k] + (uint32)0x5A827999,s)
59 #define ROUND3(a,b,c,d,k,s) a = lshift(a + H(b,c,d) + X[k] + (uint32)0x6ED9EBA1,s)
60 
61 /* this applies md4 to 64 byte chunks */
62 static void mdfour64_ntlmssp(uint32 *M)
63 {
64  int j;
65  uint32 AA, BB, CC, DD;
66  uint32 X[16];
67 
68  for (j=0;j<16;j++)
69  X[j] = M[j];
70 
71  AA = A; BB = B; CC = C; DD = D;
72 
73  ROUND1(A,B,C,D, 0, 3); ROUND1(D,A,B,C, 1, 7);
74  ROUND1(C,D,A,B, 2, 11); ROUND1(B,C,D,A, 3, 19);
75  ROUND1(A,B,C,D, 4, 3); ROUND1(D,A,B,C, 5, 7);
76  ROUND1(C,D,A,B, 6, 11); ROUND1(B,C,D,A, 7, 19);
77  ROUND1(A,B,C,D, 8, 3); ROUND1(D,A,B,C, 9, 7);
78  ROUND1(C,D,A,B, 10, 11); ROUND1(B,C,D,A, 11, 19);
79  ROUND1(A,B,C,D, 12, 3); ROUND1(D,A,B,C, 13, 7);
80  ROUND1(C,D,A,B, 14, 11); ROUND1(B,C,D,A, 15, 19);
81 
82  ROUND2(A,B,C,D, 0, 3); ROUND2(D,A,B,C, 4, 5);
83  ROUND2(C,D,A,B, 8, 9); ROUND2(B,C,D,A, 12, 13);
84  ROUND2(A,B,C,D, 1, 3); ROUND2(D,A,B,C, 5, 5);
85  ROUND2(C,D,A,B, 9, 9); ROUND2(B,C,D,A, 13, 13);
86  ROUND2(A,B,C,D, 2, 3); ROUND2(D,A,B,C, 6, 5);
87  ROUND2(C,D,A,B, 10, 9); ROUND2(B,C,D,A, 14, 13);
88  ROUND2(A,B,C,D, 3, 3); ROUND2(D,A,B,C, 7, 5);
89  ROUND2(C,D,A,B, 11, 9); ROUND2(B,C,D,A, 15, 13);
90 
91  ROUND3(A,B,C,D, 0, 3); ROUND3(D,A,B,C, 8, 9);
92  ROUND3(C,D,A,B, 4, 11); ROUND3(B,C,D,A, 12, 15);
93  ROUND3(A,B,C,D, 2, 3); ROUND3(D,A,B,C, 10, 9);
94  ROUND3(C,D,A,B, 6, 11); ROUND3(B,C,D,A, 14, 15);
95  ROUND3(A,B,C,D, 1, 3); ROUND3(D,A,B,C, 9, 9);
96  ROUND3(C,D,A,B, 5, 11); ROUND3(B,C,D,A, 13, 15);
97  ROUND3(A,B,C,D, 3, 3); ROUND3(D,A,B,C, 11, 9);
98  ROUND3(C,D,A,B, 7, 11); ROUND3(B,C,D,A, 15, 15);
99 
100  A += AA; B += BB; C += CC; D += DD;
101 
102  A &= 0xFFFFFFFF; B &= 0xFFFFFFFF;
103  C &= 0xFFFFFFFF; D &= 0xFFFFFFFF;
104  memset (X, '\0', sizeof (X));
105 }
106 
107 static void copy64_ntlmssp(uint32 *M, const unsigned char *in)
108 {
109  int i;
110 
111  for (i=0;i<16;i++)
112  M[i] = (in[i*4+3]<<24) | (in[i*4+2]<<16) |
113  (in[i*4+1]<<8) | (in[i*4+0]<<0);
114 }
115 
116 static void copy4_ntlmssp(unsigned char *out, uint32 x)
117 {
118  out[0] = x&0xFF;
119  out[1] = (x>>8)&0xFF;
120  out[2] = (x>>16)&0xFF;
121  out[3] = (x>>24)&0xFF;
122 }
123 
124 /* produce a md4 message digest from data of length n bytes */
125 void mdfour_ntlmssp(unsigned char *out, const unsigned char *in, int n)
126 {
127  unsigned char buf[128];
128  uint32 M[16];
129  uint32 b = n * 8;
130  int i;
131 
132  A = 0x67452301;
133  B = 0xefcdab89;
134  C = 0x98badcfe;
135  D = 0x10325476;
136 
137  while (n > 64) {
138  copy64_ntlmssp(M, in);
139  mdfour64_ntlmssp(M);
140  in += 64;
141  n -= 64;
142  }
143 
144  for (i=0;i<128;i++)
145  buf[i] = 0;
146  memcpy(buf, in, n);
147  buf[n] = 0x80;
148 
149  if (n <= 55) {
150  copy4_ntlmssp(buf+56, b);
151  copy64_ntlmssp(M, buf);
152  mdfour64_ntlmssp(M);
153  } else {
154  copy4_ntlmssp(buf+120, b);
155  copy64_ntlmssp(M, buf);
156  mdfour64_ntlmssp(M);
157  copy64_ntlmssp(M, buf+64);
158  mdfour64_ntlmssp(M);
159  }
160 
161  for (i=0;i<128;i++)
162  buf[i] = 0;
163  copy64_ntlmssp(M, buf);
164 
165  copy4_ntlmssp(out, A);
166  copy4_ntlmssp(out+4, B);
167  copy4_ntlmssp(out+8, C);
168  copy4_ntlmssp(out+12, D);
169 
170  A = B = C = D = 0;
171 }
172 
Definition: cvss.c:103
#define ROUND2(a, b, c, d, k, s)
Definition: md4.c:58
#define uint32
Definition: md4.c:26
void mdfour_ntlmssp(unsigned char *out, const unsigned char *in, int n)
Definition: md4.c:125
#define ROUND1(a, b, c, d, k, s)
Definition: md4.c:57
#define ROUND3(a, b, c, d, k, s)
Definition: md4.c:59
Definition: cvss.c:103