]>
git.ipfire.org Git - thirdparty/squid.git/blob - lib/smblib/md4.c
27e466806878e5c32de1d5271961e077b790a142
4 * Unix SMB/Netbios implementation.
6 * a implementation of MD4 designed for use in the SMB authentication protocol
7 * Copyright (C) Andrew Tridgell 1997
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
25 #include "smblib/md4.h"
27 /* NOTE: This code makes no attempt to be fast!
29 * It assumes that a int is at least 32 bits long
32 typedef unsigned int uint32
;
34 static uint32 A
, B
, C
, D
;
37 F(uint32 X
, uint32 Y
, uint32 Z
)
39 return (X
& Y
) | ((~X
) & Z
);
43 G(uint32 X
, uint32 Y
, uint32 Z
)
45 return (X
& Y
) | (X
& Z
) | (Y
& Z
);
49 H(uint32 X
, uint32 Y
, uint32 Z
)
55 lshift(uint32 x
, int s
)
58 return ((x
<< s
) & 0xFFFFFFFF) | (x
>> (32 - s
));
61 #define ROUND1(a,b,c,d,k,s) a = lshift(a + F(b,c,d) + X[k], s)
62 #define ROUND2(a,b,c,d,k,s) a = lshift(a + G(b,c,d) + X[k] + (uint32)0x5A827999,s)
63 #define ROUND3(a,b,c,d,k,s) a = lshift(a + H(b,c,d) + X[k] + (uint32)0x6ED9EBA1,s)
65 /* this applies md4 to 64 byte chunks */
70 uint32 AA
, BB
, CC
, DD
;
73 for (j
= 0; j
< 16; j
++)
81 ROUND1(A
, B
, C
, D
, 0, 3);
82 ROUND1(D
, A
, B
, C
, 1, 7);
83 ROUND1(C
, D
, A
, B
, 2, 11);
84 ROUND1(B
, C
, D
, A
, 3, 19);
85 ROUND1(A
, B
, C
, D
, 4, 3);
86 ROUND1(D
, A
, B
, C
, 5, 7);
87 ROUND1(C
, D
, A
, B
, 6, 11);
88 ROUND1(B
, C
, D
, A
, 7, 19);
89 ROUND1(A
, B
, C
, D
, 8, 3);
90 ROUND1(D
, A
, B
, C
, 9, 7);
91 ROUND1(C
, D
, A
, B
, 10, 11);
92 ROUND1(B
, C
, D
, A
, 11, 19);
93 ROUND1(A
, B
, C
, D
, 12, 3);
94 ROUND1(D
, A
, B
, C
, 13, 7);
95 ROUND1(C
, D
, A
, B
, 14, 11);
96 ROUND1(B
, C
, D
, A
, 15, 19);
98 ROUND2(A
, B
, C
, D
, 0, 3);
99 ROUND2(D
, A
, B
, C
, 4, 5);
100 ROUND2(C
, D
, A
, B
, 8, 9);
101 ROUND2(B
, C
, D
, A
, 12, 13);
102 ROUND2(A
, B
, C
, D
, 1, 3);
103 ROUND2(D
, A
, B
, C
, 5, 5);
104 ROUND2(C
, D
, A
, B
, 9, 9);
105 ROUND2(B
, C
, D
, A
, 13, 13);
106 ROUND2(A
, B
, C
, D
, 2, 3);
107 ROUND2(D
, A
, B
, C
, 6, 5);
108 ROUND2(C
, D
, A
, B
, 10, 9);
109 ROUND2(B
, C
, D
, A
, 14, 13);
110 ROUND2(A
, B
, C
, D
, 3, 3);
111 ROUND2(D
, A
, B
, C
, 7, 5);
112 ROUND2(C
, D
, A
, B
, 11, 9);
113 ROUND2(B
, C
, D
, A
, 15, 13);
115 ROUND3(A
, B
, C
, D
, 0, 3);
116 ROUND3(D
, A
, B
, C
, 8, 9);
117 ROUND3(C
, D
, A
, B
, 4, 11);
118 ROUND3(B
, C
, D
, A
, 12, 15);
119 ROUND3(A
, B
, C
, D
, 2, 3);
120 ROUND3(D
, A
, B
, C
, 10, 9);
121 ROUND3(C
, D
, A
, B
, 6, 11);
122 ROUND3(B
, C
, D
, A
, 14, 15);
123 ROUND3(A
, B
, C
, D
, 1, 3);
124 ROUND3(D
, A
, B
, C
, 9, 9);
125 ROUND3(C
, D
, A
, B
, 5, 11);
126 ROUND3(B
, C
, D
, A
, 13, 15);
127 ROUND3(A
, B
, C
, D
, 3, 3);
128 ROUND3(D
, A
, B
, C
, 11, 9);
129 ROUND3(C
, D
, A
, B
, 7, 11);
130 ROUND3(B
, C
, D
, A
, 15, 15);
142 for (j
= 0; j
< 16; j
++)
147 copy64(uint32
* M
, unsigned char *in
)
151 for (i
= 0; i
< 16; i
++)
152 M
[i
] = (in
[i
* 4 + 3] << 24) | (in
[i
* 4 + 2] << 16) |
153 (in
[i
* 4 + 1] << 8) | (in
[i
* 4 + 0] << 0);
157 copy4(unsigned char *out
, uint32 x
)
160 out
[1] = (x
>> 8) & 0xFF;
161 out
[2] = (x
>> 16) & 0xFF;
162 out
[3] = (x
>> 24) & 0xFF;
165 /* produce a md4 message digest from data of length n bytes */
167 mdfour(unsigned char *out
, unsigned char *in
, int n
)
169 unsigned char buf
[128];
186 for (i
= 0; i
< 128; i
++)
203 for (i
= 0; i
< 128; i
++)