Remove remaining NETWARE ifdef's
[openssl.git] / crypto / perlasm / cbc.pl
1 #! /usr/bin/env perl
2 # Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
3 #
4 # Licensed under the OpenSSL license (the "License").  You may not use
5 # this file except in compliance with the License.  You can obtain a copy
6 # in the file LICENSE in the source distribution or at
7 # https://www.openssl.org/source/license.html
8
9
10 # void des_ncbc_encrypt(input, output, length, schedule, ivec, enc)
11 # des_cblock (*input);
12 # des_cblock (*output);
13 # long length;
14 # des_key_schedule schedule;
15 # des_cblock (*ivec);
16 # int enc;
17 #
18 # calls
19 # des_encrypt((DES_LONG *)tin,schedule,DES_ENCRYPT);
20 #
21
22 #&cbc("des_ncbc_encrypt","des_encrypt",0);
23 #&cbc("BF_cbc_encrypt","BF_encrypt","BF_encrypt",
24 #       1,4,5,3,5,-1);
25 #&cbc("des_ncbc_encrypt","des_encrypt","des_encrypt",
26 #       0,4,5,3,5,-1);
27 #&cbc("des_ede3_cbc_encrypt","des_encrypt3","des_decrypt3",
28 #       0,6,7,3,4,5);
29 #
30 # When doing a cipher that needs bigendian order,
31 # for encrypt, the iv is kept in bigendian form,
32 # while for decrypt, it is kept in little endian.
33 sub cbc
34         {
35         local($name,$enc_func,$dec_func,$swap,$iv_off,$enc_off,$p1,$p2,$p3)=@_;
36         # name is the function name
37         # enc_func and dec_func and the functions to call for encrypt/decrypt
38         # swap is true if byte order needs to be reversed
39         # iv_off is parameter number for the iv
40         # enc_off is parameter number for the encrypt/decrypt flag
41         # p1,p2,p3 are the offsets for parameters to be passed to the
42         # underlying calls.
43
44         &function_begin_B($name,"");
45         &comment("");
46
47         $in="esi";
48         $out="edi";
49         $count="ebp";
50
51         &push("ebp");
52         &push("ebx");
53         &push("esi");
54         &push("edi");
55
56         $data_off=4;
57         $data_off+=4 if ($p1 > 0);
58         $data_off+=4 if ($p2 > 0);
59         $data_off+=4 if ($p3 > 0);
60
61         &mov($count,    &wparam(2));    # length
62
63         &comment("getting iv ptr from parameter $iv_off");
64         &mov("ebx",     &wparam($iv_off));      # Get iv ptr
65
66         &mov($in,       &DWP(0,"ebx","",0));#   iv[0]
67         &mov($out,      &DWP(4,"ebx","",0));#   iv[1]
68
69         &push($out);
70         &push($in);
71         &push($out);    # used in decrypt for iv[1]
72         &push($in);     # used in decrypt for iv[0]
73
74         &mov("ebx",     "esp");         # This is the address of tin[2]
75
76         &mov($in,       &wparam(0));    # in
77         &mov($out,      &wparam(1));    # out
78
79         # We have loaded them all, how lets push things
80         &comment("getting encrypt flag from parameter $enc_off");
81         &mov("ecx",     &wparam($enc_off));     # Get enc flag
82         if ($p3 > 0)
83                 {
84                 &comment("get and push parameter $p3");
85                 if ($enc_off != $p3)
86                         { &mov("eax",   &wparam($p3)); &push("eax"); }
87                 else    { &push("ecx"); }
88                 }
89         if ($p2 > 0)
90                 {
91                 &comment("get and push parameter $p2");
92                 if ($enc_off != $p2)
93                         { &mov("eax",   &wparam($p2)); &push("eax"); }
94                 else    { &push("ecx"); }
95                 }
96         if ($p1 > 0)
97                 {
98                 &comment("get and push parameter $p1");
99                 if ($enc_off != $p1)
100                         { &mov("eax",   &wparam($p1)); &push("eax"); }
101                 else    { &push("ecx"); }
102                 }
103         &push("ebx");           # push data/iv
104
105         &cmp("ecx",0);
106         &jz(&label("decrypt"));
107
108         &and($count,0xfffffff8);
109         &mov("eax",     &DWP($data_off,"esp","",0));    # load iv[0]
110         &mov("ebx",     &DWP($data_off+4,"esp","",0));  # load iv[1]
111
112         &jz(&label("encrypt_finish"));
113
114         #############################################################
115
116         &set_label("encrypt_loop");
117         # encrypt start
118         # "eax" and "ebx" hold iv (or the last cipher text)
119
120         &mov("ecx",     &DWP(0,$in,"",0));      # load first 4 bytes
121         &mov("edx",     &DWP(4,$in,"",0));      # second 4 bytes
122
123         &xor("eax",     "ecx");
124         &xor("ebx",     "edx");
125
126         &bswap("eax")   if $swap;
127         &bswap("ebx")   if $swap;
128
129         &mov(&DWP($data_off,"esp","",0),        "eax"); # put in array for call
130         &mov(&DWP($data_off+4,"esp","",0),      "ebx"); #
131
132         &call($enc_func);
133
134         &mov("eax",     &DWP($data_off,"esp","",0));
135         &mov("ebx",     &DWP($data_off+4,"esp","",0));
136
137         &bswap("eax")   if $swap;
138         &bswap("ebx")   if $swap;
139
140         &mov(&DWP(0,$out,"",0),"eax");
141         &mov(&DWP(4,$out,"",0),"ebx");
142
143         # eax and ebx are the next iv.
144
145         &add($in,       8);
146         &add($out,      8);
147
148         &sub($count,    8);
149         &jnz(&label("encrypt_loop"));
150
151 ###################################################################3
152         &set_label("encrypt_finish");
153         &mov($count,    &wparam(2));    # length
154         &and($count,    7);
155         &jz(&label("finish"));
156         &call(&label("PIC_point"));
157 &set_label("PIC_point");
158         &blindpop("edx");
159         &lea("ecx",&DWP(&label("cbc_enc_jmp_table")."-".&label("PIC_point"),"edx"));
160         &mov($count,&DWP(0,"ecx",$count,4));
161         &add($count,"edx");
162         &xor("ecx","ecx");
163         &xor("edx","edx");
164         #&mov($count,&DWP(&label("cbc_enc_jmp_table"),"",$count,4));
165         &jmp_ptr($count);
166
167 &set_label("ej7");
168         &movb(&HB("edx"),       &BP(6,$in,"",0));
169         &shl("edx",8);
170 &set_label("ej6");
171         &movb(&HB("edx"),       &BP(5,$in,"",0));
172 &set_label("ej5");
173         &movb(&LB("edx"),       &BP(4,$in,"",0));
174 &set_label("ej4");
175         &mov("ecx",             &DWP(0,$in,"",0));
176         &jmp(&label("ejend"));
177 &set_label("ej3");
178         &movb(&HB("ecx"),       &BP(2,$in,"",0));
179         &shl("ecx",8);
180 &set_label("ej2");
181         &movb(&HB("ecx"),       &BP(1,$in,"",0));
182 &set_label("ej1");
183         &movb(&LB("ecx"),       &BP(0,$in,"",0));
184 &set_label("ejend");
185
186         &xor("eax",     "ecx");
187         &xor("ebx",     "edx");
188
189         &bswap("eax")   if $swap;
190         &bswap("ebx")   if $swap;
191
192         &mov(&DWP($data_off,"esp","",0),        "eax"); # put in array for call
193         &mov(&DWP($data_off+4,"esp","",0),      "ebx"); #
194
195         &call($enc_func);
196
197         &mov("eax",     &DWP($data_off,"esp","",0));
198         &mov("ebx",     &DWP($data_off+4,"esp","",0));
199
200         &bswap("eax")   if $swap;
201         &bswap("ebx")   if $swap;
202
203         &mov(&DWP(0,$out,"",0),"eax");
204         &mov(&DWP(4,$out,"",0),"ebx");
205
206         &jmp(&label("finish"));
207
208         #############################################################
209         #############################################################
210         &set_label("decrypt",1);
211         # decrypt start
212         &and($count,0xfffffff8);
213         # The next 2 instructions are only for if the jz is taken
214         &mov("eax",     &DWP($data_off+8,"esp","",0));  # get iv[0]
215         &mov("ebx",     &DWP($data_off+12,"esp","",0)); # get iv[1]
216         &jz(&label("decrypt_finish"));
217
218         &set_label("decrypt_loop");
219         &mov("eax",     &DWP(0,$in,"",0));      # load first 4 bytes
220         &mov("ebx",     &DWP(4,$in,"",0));      # second 4 bytes
221
222         &bswap("eax")   if $swap;
223         &bswap("ebx")   if $swap;
224
225         &mov(&DWP($data_off,"esp","",0),        "eax"); # put back
226         &mov(&DWP($data_off+4,"esp","",0),      "ebx"); #
227
228         &call($dec_func);
229
230         &mov("eax",     &DWP($data_off,"esp","",0));    # get return
231         &mov("ebx",     &DWP($data_off+4,"esp","",0));  #
232
233         &bswap("eax")   if $swap;
234         &bswap("ebx")   if $swap;
235
236         &mov("ecx",     &DWP($data_off+8,"esp","",0));  # get iv[0]
237         &mov("edx",     &DWP($data_off+12,"esp","",0)); # get iv[1]
238
239         &xor("ecx",     "eax");
240         &xor("edx",     "ebx");
241
242         &mov("eax",     &DWP(0,$in,"",0));      # get old cipher text,
243         &mov("ebx",     &DWP(4,$in,"",0));      # next iv actually
244
245         &mov(&DWP(0,$out,"",0),"ecx");
246         &mov(&DWP(4,$out,"",0),"edx");
247
248         &mov(&DWP($data_off+8,"esp","",0),      "eax"); # save iv
249         &mov(&DWP($data_off+12,"esp","",0),     "ebx"); #
250
251         &add($in,       8);
252         &add($out,      8);
253
254         &sub($count,    8);
255         &jnz(&label("decrypt_loop"));
256 ############################ ENDIT #######################3
257         &set_label("decrypt_finish");
258         &mov($count,    &wparam(2));    # length
259         &and($count,    7);
260         &jz(&label("finish"));
261
262         &mov("eax",     &DWP(0,$in,"",0));      # load first 4 bytes
263         &mov("ebx",     &DWP(4,$in,"",0));      # second 4 bytes
264
265         &bswap("eax")   if $swap;
266         &bswap("ebx")   if $swap;
267
268         &mov(&DWP($data_off,"esp","",0),        "eax"); # put back
269         &mov(&DWP($data_off+4,"esp","",0),      "ebx"); #
270
271         &call($dec_func);
272
273         &mov("eax",     &DWP($data_off,"esp","",0));    # get return
274         &mov("ebx",     &DWP($data_off+4,"esp","",0));  #
275
276         &bswap("eax")   if $swap;
277         &bswap("ebx")   if $swap;
278
279         &mov("ecx",     &DWP($data_off+8,"esp","",0));  # get iv[0]
280         &mov("edx",     &DWP($data_off+12,"esp","",0)); # get iv[1]
281
282         &xor("ecx",     "eax");
283         &xor("edx",     "ebx");
284
285         # this is for when we exit
286         &mov("eax",     &DWP(0,$in,"",0));      # get old cipher text,
287         &mov("ebx",     &DWP(4,$in,"",0));      # next iv actually
288
289 &set_label("dj7");
290         &rotr("edx",    16);
291         &movb(&BP(6,$out,"",0), &LB("edx"));
292         &shr("edx",16);
293 &set_label("dj6");
294         &movb(&BP(5,$out,"",0), &HB("edx"));
295 &set_label("dj5");
296         &movb(&BP(4,$out,"",0), &LB("edx"));
297 &set_label("dj4");
298         &mov(&DWP(0,$out,"",0), "ecx");
299         &jmp(&label("djend"));
300 &set_label("dj3");
301         &rotr("ecx",    16);
302         &movb(&BP(2,$out,"",0), &LB("ecx"));
303         &shl("ecx",16);
304 &set_label("dj2");
305         &movb(&BP(1,$in,"",0),  &HB("ecx"));
306 &set_label("dj1");
307         &movb(&BP(0,$in,"",0),  &LB("ecx"));
308 &set_label("djend");
309
310         # final iv is still in eax:ebx
311         &jmp(&label("finish"));
312
313
314 ############################ FINISH #######################3
315         &set_label("finish",1);
316         &mov("ecx",     &wparam($iv_off));      # Get iv ptr
317
318         #################################################
319         $total=16+4;
320         $total+=4 if ($p1 > 0);
321         $total+=4 if ($p2 > 0);
322         $total+=4 if ($p3 > 0);
323         &add("esp",$total);
324
325         &mov(&DWP(0,"ecx","",0),        "eax"); # save iv
326         &mov(&DWP(4,"ecx","",0),        "ebx"); # save iv
327
328         &function_end_A($name);
329
330         &align(64);
331         &set_label("cbc_enc_jmp_table");
332         &data_word("0");
333         &data_word(&label("ej1")."-".&label("PIC_point"));
334         &data_word(&label("ej2")."-".&label("PIC_point"));
335         &data_word(&label("ej3")."-".&label("PIC_point"));
336         &data_word(&label("ej4")."-".&label("PIC_point"));
337         &data_word(&label("ej5")."-".&label("PIC_point"));
338         &data_word(&label("ej6")."-".&label("PIC_point"));
339         &data_word(&label("ej7")."-".&label("PIC_point"));
340         # not used
341         #&set_label("cbc_dec_jmp_table",1);
342         #&data_word("0");
343         #&data_word(&label("dj1")."-".&label("PIC_point"));
344         #&data_word(&label("dj2")."-".&label("PIC_point"));
345         #&data_word(&label("dj3")."-".&label("PIC_point"));
346         #&data_word(&label("dj4")."-".&label("PIC_point"));
347         #&data_word(&label("dj5")."-".&label("PIC_point"));
348         #&data_word(&label("dj6")."-".&label("PIC_point"));
349         #&data_word(&label("dj7")."-".&label("PIC_point"));
350         &align(64);
351
352         &function_end_B($name);
353
354         }
355
356 1;