OpenVAS Libraries  9.0.3
arc4.c File Reference
#include <stdlib.h>
Include dependency graph for arc4.c:

Go to the source code of this file.

Functions

void smb_arc4_init_ntlmssp (unsigned char arc4_state_out[258], const unsigned char *key, size_t keylen)
 
void smb_arc4_crypt_ntlmssp (unsigned char arc4_state_inout[258], unsigned char *data, size_t len)
 

Function Documentation

◆ smb_arc4_crypt_ntlmssp()

void smb_arc4_crypt_ntlmssp ( unsigned char  arc4_state_inout[258],
unsigned char *  data,
size_t  len 
)

Definition at line 57 of file arc4.c.

58 {
59  unsigned char index_i = arc4_state_inout[256];
60  unsigned char index_j = arc4_state_inout[257];
61  size_t ind;
62 
63  for( ind = 0; ind < len; ind++) {
64  unsigned char tc;
65  unsigned char t;
66 
67  index_i++;
68  index_j += arc4_state_inout[index_i];
69 
70  tc = arc4_state_inout[index_i];
71  arc4_state_inout[index_i] = arc4_state_inout[index_j];
72  arc4_state_inout[index_j] = tc;
73 
74  t = arc4_state_inout[index_i] + arc4_state_inout[index_j];
75  data[ind] = data[ind] ^ arc4_state_inout[t];
76  }
77 
78  arc4_state_inout[256] = index_i;
79  arc4_state_inout[257] = index_j;
80 }

◆ smb_arc4_init_ntlmssp()

void smb_arc4_init_ntlmssp ( unsigned char  arc4_state_out[258],
const unsigned char *  key,
size_t  keylen 
)

Definition at line 30 of file arc4.c.

31 {
32  size_t ind;
33  unsigned char j = 0;
34 
35  for (ind = 0; ind < 256; ind++) {
36  arc4_state_out[ind] = (unsigned char)ind;
37  }
38 
39  for( ind = 0; ind < 256; ind++) {
40  unsigned char tc;
41 
42  j += (arc4_state_out[ind] + key[ind%keylen]);
43 
44  tc = arc4_state_out[ind];
45  arc4_state_out[ind] = arc4_state_out[j];
46  arc4_state_out[j] = tc;
47  }
48  arc4_state_out[256] = 0;
49  arc4_state_out[257] = 0;
50 }