3 # define for pentium pro friendly version
6 $0 =~ m/(.*[\/\\])[^\/\\]+$/; $dir=$1;
7 push(@INC,"${dir}","${dir}../../perlasm");
11 &asm_init($ARGV[0],"cast-586.pl",$ARGV[$#ARGV] eq "386");
26 @F1=("add","xor","sub");
27 @F2=("xor","sub","add");
28 @F3=("sub","add","xor");
30 &CAST_encrypt("CAST_encrypt",1);
31 &CAST_encrypt("CAST_decrypt",0);
32 &cbc("CAST_cbc_encrypt","CAST_encrypt","CAST_decrypt",1,4,5,3,-1,-1);
39 local($win_ex)=<<"EOF";
40 EXTERN _CAST_S_table0:DWORD
41 EXTERN _CAST_S_table1:DWORD
42 EXTERN _CAST_S_table2:DWORD
43 EXTERN _CAST_S_table3:DWORD
45 &main::external_label(
52 &function_begin_B($name,$win_ex);
58 &mov($tmp2,&wparam(0));
63 &comment("Load the 2 words");
64 &mov($L,&DWP(0,$tmp2,"",0));
65 &mov($R,&DWP(4,$tmp2,"",0));
67 &comment('Get short key flag');
68 &mov($tmp3,&DWP(128,$K,"",0));
73 &jnz(&label('cast_dec_skip'));
81 &E_CAST( 0,$S,$L,$R,$K,@F1,$tmp1,$tmp2,$tmp3,$tmp4);
82 &E_CAST( 1,$S,$R,$L,$K,@F2,$tmp1,$tmp2,$tmp3,$tmp4);
83 &E_CAST( 2,$S,$L,$R,$K,@F3,$tmp1,$tmp2,$tmp3,$tmp4);
84 &E_CAST( 3,$S,$R,$L,$K,@F1,$tmp1,$tmp2,$tmp3,$tmp4);
85 &E_CAST( 4,$S,$L,$R,$K,@F2,$tmp1,$tmp2,$tmp3,$tmp4);
86 &E_CAST( 5,$S,$R,$L,$K,@F3,$tmp1,$tmp2,$tmp3,$tmp4);
87 &E_CAST( 6,$S,$L,$R,$K,@F1,$tmp1,$tmp2,$tmp3,$tmp4);
88 &E_CAST( 7,$S,$R,$L,$K,@F2,$tmp1,$tmp2,$tmp3,$tmp4);
89 &E_CAST( 8,$S,$L,$R,$K,@F3,$tmp1,$tmp2,$tmp3,$tmp4);
90 &E_CAST( 9,$S,$R,$L,$K,@F1,$tmp1,$tmp2,$tmp3,$tmp4);
91 &E_CAST(10,$S,$L,$R,$K,@F2,$tmp1,$tmp2,$tmp3,$tmp4);
92 &E_CAST(11,$S,$R,$L,$K,@F3,$tmp1,$tmp2,$tmp3,$tmp4);
93 &comment('test short key flag');
96 &jnz(&label('cast_enc_done'));
97 &E_CAST(12,$S,$L,$R,$K,@F1,$tmp1,$tmp2,$tmp3,$tmp4);
98 &E_CAST(13,$S,$R,$L,$K,@F2,$tmp1,$tmp2,$tmp3,$tmp4);
99 &E_CAST(14,$S,$L,$R,$K,@F3,$tmp1,$tmp2,$tmp3,$tmp4);
100 &E_CAST(15,$S,$R,$L,$K,@F1,$tmp1,$tmp2,$tmp3,$tmp4);
102 &E_CAST(15,$S,$L,$R,$K,@F1,$tmp1,$tmp2,$tmp3,$tmp4);
103 &E_CAST(14,$S,$R,$L,$K,@F3,$tmp1,$tmp2,$tmp3,$tmp4);
104 &E_CAST(13,$S,$L,$R,$K,@F2,$tmp1,$tmp2,$tmp3,$tmp4);
105 &E_CAST(12,$S,$R,$L,$K,@F1,$tmp1,$tmp2,$tmp3,$tmp4);
106 &set_label('cast_dec_skip');
107 &E_CAST(11,$S,$L,$R,$K,@F3,$tmp1,$tmp2,$tmp3,$tmp4);
108 &E_CAST(10,$S,$R,$L,$K,@F2,$tmp1,$tmp2,$tmp3,$tmp4);
109 &E_CAST( 9,$S,$L,$R,$K,@F1,$tmp1,$tmp2,$tmp3,$tmp4);
110 &E_CAST( 8,$S,$R,$L,$K,@F3,$tmp1,$tmp2,$tmp3,$tmp4);
111 &E_CAST( 7,$S,$L,$R,$K,@F2,$tmp1,$tmp2,$tmp3,$tmp4);
112 &E_CAST( 6,$S,$R,$L,$K,@F1,$tmp1,$tmp2,$tmp3,$tmp4);
113 &E_CAST( 5,$S,$L,$R,$K,@F3,$tmp1,$tmp2,$tmp3,$tmp4);
114 &E_CAST( 4,$S,$R,$L,$K,@F2,$tmp1,$tmp2,$tmp3,$tmp4);
115 &E_CAST( 3,$S,$L,$R,$K,@F1,$tmp1,$tmp2,$tmp3,$tmp4);
116 &E_CAST( 2,$S,$R,$L,$K,@F3,$tmp1,$tmp2,$tmp3,$tmp4);
117 &E_CAST( 1,$S,$L,$R,$K,@F2,$tmp1,$tmp2,$tmp3,$tmp4);
118 &E_CAST( 0,$S,$R,$L,$K,@F1,$tmp1,$tmp2,$tmp3,$tmp4);
121 &set_label('cast_enc_done') if $enc;
122 # Why the nop? - Ben 17/1/99
124 &mov($tmp3,&wparam(0));
125 &mov(&DWP(4,$tmp3,"",0),$L);
126 &mov(&DWP(0,$tmp3,"",0),$R);
127 &function_end($name);
131 local($i,$S,$L,$R,$K,$OP1,$OP2,$OP3,$tmp1,$tmp2,$tmp3,$tmp4)=@_;
132 # Ri needs to have 16 pre added.
134 &comment("round $i");
135 &mov( $tmp4, &DWP($i*8,$K,"",1));
137 &mov( $tmp1, &DWP($i*8+4,$K,"",1));
140 &rotl( $tmp4, &LB($tmp1));
143 &mov( $tmp2, $tmp4); # B
146 &movb( &LB($tmp1), &HB($tmp4)); # A
152 &mov( $tmp2, $tmp4); # B
153 &movb( &LB($tmp1), &HB($tmp4)); # A # BAD BAD BAD
159 &movb( &LB($tmp3), &HB($tmp4)); # C # BAD BAD BAD
160 &and( $tmp4, 0xff); # D
162 &mov( $tmp1, &DWP($S1,"",$tmp1,4));
163 &mov( $tmp2, &DWP($S2,"",$tmp2,4));
165 &$OP2( $tmp1, $tmp2);
166 &mov( $tmp2, &DWP($S3,"",$tmp3,4));
168 &$OP3( $tmp1, $tmp2);
169 &mov( $tmp2, &DWP($S4,"",$tmp4,4));
171 &$OP1( $tmp1, $tmp2);