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md4.c File Reference

Unix SMB/CIFS implementation. More...

#include "md4.h"
#include <stdint.h>
#include <string.h>
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Macros

#define uint32   uint32_t
 
#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)
 

Functions

static uint32 F (uint32 X, uint32 Y, uint32 Z)
 
static uint32 G (uint32 X, uint32 Y, uint32 Z)
 
static uint32 H (uint32 X, uint32 Y, uint32 Z)
 
static uint32 lshift (uint32 x, int s)
 
static void mdfour64_ntlmssp (uint32 *M)
 
static void copy64_ntlmssp (uint32 *M, const unsigned char *in)
 
static void copy4_ntlmssp (unsigned char *out, uint32 x)
 
void mdfour_ntlmssp (unsigned char *out, const unsigned char *in, int n)
 

Variables

static uint32 A
 
static uint32 B
 
static uint32 C
 
static uint32 D
 

Detailed Description

Unix SMB/CIFS implementation.

A implementation of MD4 designed for use in the SMB authentication protocol

Definition in file md4.c.

Macro Definition Documentation

◆ ROUND1

#define ROUND1 (   a,
  b,
  c,
  d,
  k,
 
)    a = lshift (a + F (b, c, d) + X[k], s)

Definition at line 68 of file md4.c.

◆ ROUND2

#define ROUND2 (   a,
  b,
  c,
  d,
  k,
 
)    a = lshift (a + G (b, c, d) + X[k] + (uint32) 0x5A827999, s)

Definition at line 69 of file md4.c.

◆ ROUND3

#define ROUND3 (   a,
  b,
  c,
  d,
  k,
 
)    a = lshift (a + H (b, c, d) + X[k] + (uint32) 0x6ED9EBA1, s)

Definition at line 71 of file md4.c.

◆ uint32

#define uint32   uint32_t

Definition at line 33 of file md4.c.

Function Documentation

◆ copy4_ntlmssp()

static void copy4_ntlmssp ( unsigned char *  out,
uint32  x 
)
static

Definition at line 164 of file md4.c.

165 {
166  out[0] = x & 0xFF;
167  out[1] = (x >> 8) & 0xFF;
168  out[2] = (x >> 16) & 0xFF;
169  out[3] = (x >> 24) & 0xFF;
170 }

Referenced by mdfour_ntlmssp().

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◆ copy64_ntlmssp()

static void copy64_ntlmssp ( uint32 M,
const unsigned char *  in 
)
static

Definition at line 154 of file md4.c.

155 {
156  int i;
157 
158  for (i = 0; i < 16; i++)
159  M[i] = (in[i * 4 + 3] << 24) | (in[i * 4 + 2] << 16) | (in[i * 4 + 1] << 8)
160  | (in[i * 4 + 0] << 0);
161 }

Referenced by mdfour_ntlmssp().

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◆ F()

static uint32 F ( uint32  X,
uint32  Y,
uint32  Z 
)
static

Definition at line 44 of file md4.c.

45 {
46  return (X & Y) | ((~X) & Z);
47 }

◆ G()

static uint32 G ( uint32  X,
uint32  Y,
uint32  Z 
)
static

Definition at line 50 of file md4.c.

51 {
52  return (X & Y) | (X & Z) | (Y & Z);
53 }

◆ H()

static uint32 H ( uint32  X,
uint32  Y,
uint32  Z 
)
static

Definition at line 56 of file md4.c.

57 {
58  return X ^ Y ^ Z;
59 }

◆ lshift()

static uint32 lshift ( uint32  x,
int  s 
)
static

Definition at line 62 of file md4.c.

63 {
64  x &= 0xFFFFFFFF;
65  return ((x << s) & 0xFFFFFFFF) | (x >> (32 - s));
66 }

◆ mdfour64_ntlmssp()

static void mdfour64_ntlmssp ( uint32 M)
static

Definition at line 76 of file md4.c.

77 {
78  int j;
79  uint32 AA, BB, CC, DD;
80  uint32 X[16];
81 
82  for (j = 0; j < 16; j++)
83  X[j] = M[j];
84 
85  AA = A;
86  BB = B;
87  CC = C;
88  DD = D;
89 
90  ROUND1 (A, B, C, D, 0, 3);
91  ROUND1 (D, A, B, C, 1, 7);
92  ROUND1 (C, D, A, B, 2, 11);
93  ROUND1 (B, C, D, A, 3, 19);
94  ROUND1 (A, B, C, D, 4, 3);
95  ROUND1 (D, A, B, C, 5, 7);
96  ROUND1 (C, D, A, B, 6, 11);
97  ROUND1 (B, C, D, A, 7, 19);
98  ROUND1 (A, B, C, D, 8, 3);
99  ROUND1 (D, A, B, C, 9, 7);
100  ROUND1 (C, D, A, B, 10, 11);
101  ROUND1 (B, C, D, A, 11, 19);
102  ROUND1 (A, B, C, D, 12, 3);
103  ROUND1 (D, A, B, C, 13, 7);
104  ROUND1 (C, D, A, B, 14, 11);
105  ROUND1 (B, C, D, A, 15, 19);
106 
107  ROUND2 (A, B, C, D, 0, 3);
108  ROUND2 (D, A, B, C, 4, 5);
109  ROUND2 (C, D, A, B, 8, 9);
110  ROUND2 (B, C, D, A, 12, 13);
111  ROUND2 (A, B, C, D, 1, 3);
112  ROUND2 (D, A, B, C, 5, 5);
113  ROUND2 (C, D, A, B, 9, 9);
114  ROUND2 (B, C, D, A, 13, 13);
115  ROUND2 (A, B, C, D, 2, 3);
116  ROUND2 (D, A, B, C, 6, 5);
117  ROUND2 (C, D, A, B, 10, 9);
118  ROUND2 (B, C, D, A, 14, 13);
119  ROUND2 (A, B, C, D, 3, 3);
120  ROUND2 (D, A, B, C, 7, 5);
121  ROUND2 (C, D, A, B, 11, 9);
122  ROUND2 (B, C, D, A, 15, 13);
123 
124  ROUND3 (A, B, C, D, 0, 3);
125  ROUND3 (D, A, B, C, 8, 9);
126  ROUND3 (C, D, A, B, 4, 11);
127  ROUND3 (B, C, D, A, 12, 15);
128  ROUND3 (A, B, C, D, 2, 3);
129  ROUND3 (D, A, B, C, 10, 9);
130  ROUND3 (C, D, A, B, 6, 11);
131  ROUND3 (B, C, D, A, 14, 15);
132  ROUND3 (A, B, C, D, 1, 3);
133  ROUND3 (D, A, B, C, 9, 9);
134  ROUND3 (C, D, A, B, 5, 11);
135  ROUND3 (B, C, D, A, 13, 15);
136  ROUND3 (A, B, C, D, 3, 3);
137  ROUND3 (D, A, B, C, 11, 9);
138  ROUND3 (C, D, A, B, 7, 11);
139  ROUND3 (B, C, D, A, 15, 15);
140 
141  A += AA;
142  B += BB;
143  C += CC;
144  D += DD;
145 
146  A &= 0xFFFFFFFF;
147  B &= 0xFFFFFFFF;
148  C &= 0xFFFFFFFF;
149  D &= 0xFFFFFFFF;
150  memset (X, '\0', sizeof (X));
151 }

References A, B, C, D, ROUND1, ROUND2, ROUND3, and uint32.

Referenced by mdfour_ntlmssp().

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◆ mdfour_ntlmssp()

void mdfour_ntlmssp ( unsigned char *  out,
const unsigned char *  in,
int  n 
)

Definition at line 174 of file md4.c.

175 {
176  unsigned char buf[128];
177  uint32 M[16];
178  uint32 b = n * 8;
179  int i;
180 
181  A = 0x67452301;
182  B = 0xefcdab89;
183  C = 0x98badcfe;
184  D = 0x10325476;
185 
186  while (n > 64)
187  {
188  copy64_ntlmssp (M, in);
189  mdfour64_ntlmssp (M);
190  in += 64;
191  n -= 64;
192  }
193 
194  for (i = 0; i < 128; i++)
195  buf[i] = 0;
196  memcpy (buf, in, n);
197  buf[n] = 0x80;
198 
199  if (n <= 55)
200  {
201  copy4_ntlmssp (buf + 56, b);
202  copy64_ntlmssp (M, buf);
203  mdfour64_ntlmssp (M);
204  }
205  else
206  {
207  copy4_ntlmssp (buf + 120, b);
208  copy64_ntlmssp (M, buf);
209  mdfour64_ntlmssp (M);
210  copy64_ntlmssp (M, buf + 64);
211  mdfour64_ntlmssp (M);
212  }
213 
214  for (i = 0; i < 128; i++)
215  buf[i] = 0;
216  copy64_ntlmssp (M, buf);
217 
218  copy4_ntlmssp (out, A);
219  copy4_ntlmssp (out + 4, B);
220  copy4_ntlmssp (out + 8, C);
221  copy4_ntlmssp (out + 12, D);
222 
223  A = B = C = D = 0;
224 }

References A, B, C, copy4_ntlmssp(), copy64_ntlmssp(), D, mdfour64_ntlmssp(), and uint32.

Referenced by do_filehash_ntlmssp(), generate_random_buffer_ntlmssp(), and SMBsesskeygen_ntv1_ntlmssp().

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Variable Documentation

◆ A

uint32 A
static

Definition at line 41 of file md4.c.

Referenced by mdfour64_ntlmssp(), and mdfour_ntlmssp().

◆ B

uint32 B
static

Definition at line 41 of file md4.c.

Referenced by mdfour64_ntlmssp(), and mdfour_ntlmssp().

◆ C

uint32 C
static

Definition at line 41 of file md4.c.

Referenced by mdfour64_ntlmssp(), and mdfour_ntlmssp().

◆ D

uint32 D
static

Definition at line 41 of file md4.c.

Referenced by mdfour64_ntlmssp(), and mdfour_ntlmssp().

uint32
#define uint32
Definition: md4.c:33
B
static uint32 B
Definition: md4.c:41
ROUND1
#define ROUND1(a, b, c, d, k, s)
Definition: md4.c:68
D
static uint32 D
Definition: md4.c:41
copy64_ntlmssp
static void copy64_ntlmssp(uint32 *M, const unsigned char *in)
Definition: md4.c:154
A
static uint32 A
Definition: md4.c:41
mdfour64_ntlmssp
static void mdfour64_ntlmssp(uint32 *M)
Definition: md4.c:76
C
static uint32 C
Definition: md4.c:41
copy4_ntlmssp
static void copy4_ntlmssp(unsigned char *out, uint32 x)
Definition: md4.c:164
ROUND3
#define ROUND3(a, b, c, d, k, s)
Definition: md4.c:71
ROUND2
#define ROUND2(a, b, c, d, k, s)
Definition: md4.c:69