Import of openssl-0.9.8, a feature release.
[dragonfly.git] / crypto / openssl-0.9 / crypto / bf / asm / bf-586.pl
1 #!/usr/local/bin/perl
2
3 push(@INC,"perlasm","../../perlasm");
4 require "x86asm.pl";
5 require "cbc.pl";
6
7 &asm_init($ARGV[0],"bf-586.pl",$ARGV[$#ARGV] eq "386");
8
9 $BF_ROUNDS=16;
10 $BF_OFF=($BF_ROUNDS+2)*4;
11 $L="edi";
12 $R="esi";
13 $P="ebp";
14 $tmp1="eax";
15 $tmp2="ebx";
16 $tmp3="ecx";
17 $tmp4="edx";
18
19 &BF_encrypt("BF_encrypt",1);
20 &BF_encrypt("BF_decrypt",0);
21 &cbc("BF_cbc_encrypt","BF_encrypt","BF_decrypt",1,4,5,3,-1,-1);
22 &asm_finish();
23
24 sub BF_encrypt
25         {
26         local($name,$enc)=@_;
27
28         &function_begin_B($name,"");
29
30         &comment("");
31
32         &push("ebp");
33         &push("ebx");
34         &mov($tmp2,&wparam(0));
35         &mov($P,&wparam(1));
36         &push("esi");
37         &push("edi");
38
39         &comment("Load the 2 words");
40         &mov($L,&DWP(0,$tmp2,"",0));
41         &mov($R,&DWP(4,$tmp2,"",0));
42
43         &xor(   $tmp1,  $tmp1);
44
45         # encrypting part
46
47         if ($enc)
48                 {
49                  &mov($tmp2,&DWP(0,$P,"",0));
50                 &xor(   $tmp3,  $tmp3);
51
52                 &xor($L,$tmp2);
53                 for ($i=0; $i<$BF_ROUNDS; $i+=2)
54                         {
55                         &comment("");
56                         &comment("Round $i");
57                         &BF_ENCRYPT($i+1,$R,$L,$P,$tmp1,$tmp2,$tmp3,$tmp4,1);
58
59                         &comment("");
60                         &comment("Round ".sprintf("%d",$i+1));
61                         &BF_ENCRYPT($i+2,$L,$R,$P,$tmp1,$tmp2,$tmp3,$tmp4,1);
62                         }
63                 # &mov($tmp1,&wparam(0)); In last loop
64                 &mov($tmp4,&DWP(($BF_ROUNDS+1)*4,$P,"",0));
65                 }
66         else
67                 {
68                  &mov($tmp2,&DWP(($BF_ROUNDS+1)*4,$P,"",0));
69                 &xor(   $tmp3,  $tmp3);
70
71                 &xor($L,$tmp2);
72                 for ($i=$BF_ROUNDS; $i>0; $i-=2)
73                         {
74                         &comment("");
75                         &comment("Round $i");
76                         &BF_ENCRYPT($i,$R,$L,$P,$tmp1,$tmp2,$tmp3,$tmp4,0);
77                         &comment("");
78                         &comment("Round ".sprintf("%d",$i-1));
79                         &BF_ENCRYPT($i-1,$L,$R,$P,$tmp1,$tmp2,$tmp3,$tmp4,0);
80                         }
81                 # &mov($tmp1,&wparam(0)); In last loop
82                 &mov($tmp4,&DWP(0,$P,"",0));
83                 }
84
85         &xor($R,$tmp4);
86         &mov(&DWP(4,$tmp1,"",0),$L);
87
88         &mov(&DWP(0,$tmp1,"",0),$R);
89         &function_end($name);
90         }
91
92 sub BF_ENCRYPT
93         {
94         local($i,$L,$R,$P,$tmp1,$tmp2,$tmp3,$tmp4,$enc)=@_;
95
96         &mov(   $tmp4,          &DWP(&n2a($i*4),$P,"",0)); # for next round
97
98         &mov(   $tmp2,          $R);
99         &xor(   $L,             $tmp4);
100
101         &shr(   $tmp2,          16);
102         &mov(   $tmp4,          $R);
103
104         &movb(  &LB($tmp1),     &HB($tmp2));    # A
105         &and(   $tmp2,          0xff);          # B
106
107         &movb(  &LB($tmp3),     &HB($tmp4));    # C
108         &and(   $tmp4,          0xff);          # D
109
110         &mov(   $tmp1,          &DWP(&n2a($BF_OFF+0x0000),$P,$tmp1,4));
111         &mov(   $tmp2,          &DWP(&n2a($BF_OFF+0x0400),$P,$tmp2,4));
112
113         &add(   $tmp2,          $tmp1);
114         &mov(   $tmp1,          &DWP(&n2a($BF_OFF+0x0800),$P,$tmp3,4));
115
116         &xor(   $tmp2,          $tmp1);
117         &mov(   $tmp4,          &DWP(&n2a($BF_OFF+0x0C00),$P,$tmp4,4));
118
119         &add(   $tmp2,          $tmp4);
120         if (($enc && ($i != 16)) || ((!$enc) && ($i != 1)))
121                 { &xor( $tmp1,          $tmp1); }
122         else
123                 {
124                 &comment("Load parameter 0 ($i) enc=$enc");
125                 &mov($tmp1,&wparam(0));
126                 } # In last loop
127
128         &xor(   $L,             $tmp2);
129         # delay
130         }
131
132 sub n2a
133         {
134         sprintf("%d",$_[0]);
135         }
136