5 # base code is in microsft
10 # WILL NOT WORK ANYMORE WITH desboth.pl
13 if ( ($ARGV[0] eq "elf"))
14 { require "x86unix.pl"; }
15 elsif ( ($ARGV[0] eq "a.out"))
16 { $aout=1; require "x86unix.pl"; }
17 elsif ( ($ARGV[0] eq "sol"))
18 { $sol=1; require "x86unix.pl"; }
19 elsif ( ($ARGV[0] eq "cpp"))
20 { $cpp=1; require "x86unix.pl"; }
21 elsif ( ($ARGV[0] eq "win32"))
22 { require "x86ms.pl"; }
26 Pick one target type from
27 elf - linux, FreeBSD etc
30 cpp - format so x86unix.cpp can be used
31 win32 - Windows 95/Windows NT
36 &comment("Don't even think of reading this code");
37 &comment("It was automatically generated by $prog");
38 &comment("Which is a perl program used to generate the x86 assember for");
39 &comment("any of elf, a.out, Win32, or Solaris");
40 &comment("It can be found in SSLeay 0.6.5+ or in libdes 3.26+");
41 &comment("eric <eay\@cryptsoft.com>");
49 &des_encrypt("des_encrypt",1);
50 &des_encrypt("des_encrypt2",0);
52 &des_encrypt3("des_encrypt3",1);
53 &des_encrypt3("des_decrypt3",0);
59 local($name,$do_ip)=@_;
61 &function_begin($name,"EXTRN _des_SPtrans:DWORD");
64 &comment("Load the 2 words");
65 &mov("eax",&wparam(0));
66 &mov($L,&DWP(0,"eax","",0));
67 &mov($R,&DWP(4,"eax","",0));
79 &comment("fixup rotate");
85 &comment("load counter, key_schedule and enc flag");
86 &mov("eax",&wparam(2)); # get encrypt flag
87 &mov("ebp",&wparam(1)); # get ks
89 &je(&label("start_decrypt"));
93 for ($i=0; $i<16; $i+=2)
97 &D_ENCRYPT($L,$R,$i*2,"ebp","des_SPtrans","ecx","edx","eax","ebx");
100 &comment("Round ".sprintf("%d",$i+1));
101 &D_ENCRYPT($R,$L,($i+1)*2,"ebp","des_SPtrans","ecx","edx","eax","ebx");
105 &set_label("start_decrypt");
107 for ($i=15; $i>0; $i-=2)
110 &comment("Round $i");
111 &D_ENCRYPT($L,$R,$i*2,"ebp","des_SPtrans","ecx","edx","eax","ebx");
113 &comment("Round ".sprintf("%d",$i-1));
114 &D_ENCRYPT($R,$L,($i-1)*2,"ebp","des_SPtrans","ecx","edx","eax","ebx");
128 &FP_new($R,$L,"eax");
131 &mov("eax",&wparam(0));
132 &mov(&DWP(0,"eax","",0),$L);
133 &mov(&DWP(4,"eax","",0),$R);
135 &function_end($name);
139 # The logic is to load R into 2 registers and operate on both at the same time.
140 # We also load the 2 R's into 2 more registers so we can do the 'move word down a byte'
141 # while also masking the other copy and doing a lookup. We then also accumulate the
142 # L value in 2 registers then combine them at the end.
145 local($L,$R,$S,$ks,$desSP,$u,$t,$tmp1,$tmp2,$tmp3)=@_;
147 &mov( $u, &DWP(&n2a($S*4),$ks,"",0));
148 &mov( $t, &DWP(&n2a(($S+1)*4),$ks,"",0));
153 # the numbers at the end of the line are origional instruction order
154 &mov( $tmp2, $u ); # 1 2
155 &mov( $tmp1, $t ); # 1 1
156 &and( $tmp2, "0xfc" ); # 1 4
157 &and( $tmp1, "0xfc" ); # 1 3
159 &xor( $L, &DWP("0x100+$desSP",$tmp1,"",0)); # 1 7
161 &mov( $tmp1, &DWP(" $desSP",$tmp2,"",0)); # 1 8
163 &mov( $tmp2, $u ); # 2 2
164 &xor( $L, $tmp1 ); # 1 9
165 &and( $tmp2, "0xfc" ); # 2 4
166 &mov( $tmp1, $t ); # 2 1
167 &and( $tmp1, "0xfc" ); # 2 3
169 &xor( $L, &DWP("0x300+$desSP",$tmp1,"",0)); # 2 7
171 &mov( $tmp1, &DWP("0x200+$desSP",$tmp2,"",0)); # 2 8
172 &mov( $tmp2, $u ); # 3 2
174 &xor( $L, $tmp1 ); # 2 9
175 &and( $tmp2, "0xfc" ); # 3 4
177 &mov( $tmp1, $t ); # 3 1
179 &and( $tmp1, "0xfc" ); # 3 3
181 &xor( $L, &DWP("0x500+$desSP",$tmp1,"",0)); # 3 7
182 &mov( $tmp1, &DWP("0x400+$desSP",$tmp2,"",0)); # 3 8
184 &and( $t, "0xfc" ); # 4 1
185 &xor( $L, $tmp1 ); # 3 9
187 &and( $u, "0xfc" ); # 4 2
188 &xor( $L, &DWP("0x700+$desSP",$t,"",0)); # 4 3
189 &xor( $L, &DWP("0x600+$desSP",$u,"",0)); # 4 4
194 local($a,$b,$tt,$shift,$mask)=@_;
209 &PERM_OP($r,$l,$tt, 4,"0x0f0f0f0f");
210 &PERM_OP($l,$r,$tt,16,"0x0000ffff");
211 &PERM_OP($r,$l,$tt, 2,"0x33333333");
212 &PERM_OP($l,$r,$tt, 8,"0x00ff00ff");
213 &PERM_OP($r,$l,$tt, 1,"0x55555555");
220 &PERM_OP($l,$r,$tt, 1,"0x55555555");
221 &PERM_OP($r,$l,$tt, 8,"0x00ff00ff");
222 &PERM_OP($l,$r,$tt, 2,"0x33333333");
223 &PERM_OP($r,$l,$tt,16,"0x0000ffff");
224 &PERM_OP($l,$r,$tt, 4,"0x0f0f0f0f");