3
push(@INC,"perlasm","../../perlasm");
7
&asm_init($ARGV[0],"bf-686.pl");
10
$BF_OFF=($BF_ROUNDS+2)*4;
19
&des_encrypt("BF_encrypt",1);
20
&des_encrypt("BF_decrypt",0);
21
&cbc("BF_cbc_encrypt","BF_encrypt","BF_decrypt",1,4,5,3,-1,-1);
31
&function_begin($name,"");
34
&comment("Load the 2 words");
35
&mov("eax",&wparam(0));
36
&mov($L,&DWP(0,"eax","",0));
37
&mov($R,&DWP(4,"eax","",0));
40
&comment("P pointer, s and enc flag");
50
&xor($L,&DWP(0,$P,"",0));
51
for ($i=0; $i<$BF_ROUNDS; $i+=2)
55
&BF_ENCRYPT($i+1,$R,$L,$P,$tot,$tmp1,$tmp2,$tmp3);
58
&comment("Round ".sprintf("%d",$i+1));
59
&BF_ENCRYPT($i+2,$L,$R,$P,$tot,$tmp1,$tmp2,$tmp3);
61
&xor($R,&DWP(($BF_ROUNDS+1)*4,$P,"",0));
63
&mov("eax",&wparam(0));
64
&mov(&DWP(0,"eax","",0),$R);
65
&mov(&DWP(4,"eax","",0),$L);
66
&function_end_A($name);
70
&xor($L,&DWP(($BF_ROUNDS+1)*4,$P,"",0));
71
for ($i=$BF_ROUNDS; $i>0; $i-=2)
75
&BF_ENCRYPT($i,$R,$L,$P,$tot,$tmp1,$tmp2,$tmp3);
77
&comment("Round ".sprintf("%d",$i-1));
78
&BF_ENCRYPT($i-1,$L,$R,$P,$tot,$tmp1,$tmp2,$tmp3);
80
&xor($R,&DWP(0,$P,"",0));
82
&mov("eax",&wparam(0));
83
&mov(&DWP(0,"eax","",0),$R);
84
&mov(&DWP(4,"eax","",0),$L);
85
&function_end_A($name);
88
&function_end_B($name);
93
local($i,$L,$R,$P,$tot,$tmp1,$tmp2,$tmp3)=@_;
96
&mov( $tot, &DWP(&n2a($i*4),$P,"",0));
98
&movb( &LB($tmp1), &HB($R));
99
&movb( &LB($tmp2), &LB($R));
104
&mov( $tot, &DWP(&n2a($BF_OFF+0x0000),$P,$tmp1,4));
105
&mov( $tmp3, &DWP(&n2a($BF_OFF+0x0400),$P,$tmp2,4));
107
&movb( &LB($tmp1), &HB($R));
108
&movb( &LB($tmp2), &LB($R));
111
&mov( $tmp1, &DWP(&n2a($BF_OFF+0x0800),$P,$tmp1,4)); # delay
114
&mov( $tmp3, &DWP(&n2a($BF_OFF+0x0C00),$P,$tmp2,4));