+++ /dev/null
-#!/usr/local/bin/perl
-
-# void des_ncbc_encrypt(input, output, length, schedule, ivec, enc)
-# des_cblock (*input);
-# des_cblock (*output);
-# long length;
-# des_key_schedule schedule;
-# des_cblock (*ivec);
-# int enc;
-#
-# calls
-# des_encrypt((DES_LONG *)tin,schedule,DES_ENCRYPT);
-#
-
-#&cbc("des_ncbc_encrypt","des_encrypt",0);
-#&cbc("BF_cbc_encrypt","BF_encrypt","BF_encrypt",
-# 1,4,5,3,5,-1);
-#&cbc("des_ncbc_encrypt","des_encrypt","des_encrypt",
-# 0,4,5,3,5,-1);
-#&cbc("des_ede3_cbc_encrypt","des_encrypt3","des_decrypt3",
-# 0,6,7,3,4,5);
-#
-# When doing a cipher that needs bigendian order,
-# for encrypt, the iv is kept in bigendian form,
-# while for decrypt, it is kept in little endian.
-sub cbc
- {
- local($name,$enc_func,$dec_func,$swap,$iv_off,$enc_off,$p1,$p2,$p3)=@_;
- # name is the function name
- # enc_func and dec_func and the functions to call for encrypt/decrypt
- # swap is true if byte order needs to be reversed
- # iv_off is parameter number for the iv
- # enc_off is parameter number for the encrypt/decrypt flag
- # p1,p2,p3 are the offsets for parameters to be passed to the
- # underlying calls.
-
- &function_begin_B($name,"");
- &comment("");
-
- $in="esi";
- $out="edi";
- $count="ebp";
-
- &push("ebp");
- &push("ebx");
- &push("esi");
- &push("edi");
-
- $data_off=4;
- $data_off+=4 if ($p1 > 0);
- $data_off+=4 if ($p2 > 0);
- $data_off+=4 if ($p3 > 0);
-
- &mov($count, &wparam(2)); # length
-
- &comment("getting iv ptr from parameter $iv_off");
- &mov("ebx", &wparam($iv_off)); # Get iv ptr
-
- &mov($in, &DWP(0,"ebx","",0));# iv[0]
- &mov($out, &DWP(4,"ebx","",0));# iv[1]
-
- &push($out);
- &push($in);
- &push($out); # used in decrypt for iv[1]
- &push($in); # used in decrypt for iv[0]
-
- &mov("ebx", "esp"); # This is the address of tin[2]
-
- &mov($in, &wparam(0)); # in
- &mov($out, &wparam(1)); # out
-
- # We have loaded them all, how lets push things
- &comment("getting encrypt flag from parameter $enc_off");
- &mov("ecx", &wparam($enc_off)); # Get enc flag
- if ($p3 > 0)
- {
- &comment("get and push parameter $p3");
- if ($enc_off != $p3)
- { &mov("eax", &wparam($p3)); &push("eax"); }
- else { &push("ecx"); }
- }
- if ($p2 > 0)
- {
- &comment("get and push parameter $p2");
- if ($enc_off != $p2)
- { &mov("eax", &wparam($p2)); &push("eax"); }
- else { &push("ecx"); }
- }
- if ($p1 > 0)
- {
- &comment("get and push parameter $p1");
- if ($enc_off != $p1)
- { &mov("eax", &wparam($p1)); &push("eax"); }
- else { &push("ecx"); }
- }
- &push("ebx"); # push data/iv
-
- &cmp("ecx",0);
- &jz(&label("decrypt"));
-
- &and($count,0xfffffff8);
- &mov("eax", &DWP($data_off,"esp","",0)); # load iv[0]
- &mov("ebx", &DWP($data_off+4,"esp","",0)); # load iv[1]
-
- &jz(&label("encrypt_finish"));
-
- #############################################################
-
- &set_label("encrypt_loop");
- # encrypt start
- # "eax" and "ebx" hold iv (or the last cipher text)
-
- &mov("ecx", &DWP(0,$in,"",0)); # load first 4 bytes
- &mov("edx", &DWP(4,$in,"",0)); # second 4 bytes
-
- &xor("eax", "ecx");
- &xor("ebx", "edx");
-
- &bswap("eax") if $swap;
- &bswap("ebx") if $swap;
-
- &mov(&DWP($data_off,"esp","",0), "eax"); # put in array for call
- &mov(&DWP($data_off+4,"esp","",0), "ebx"); #
-
- &call($enc_func);
-
- &mov("eax", &DWP($data_off,"esp","",0));
- &mov("ebx", &DWP($data_off+4,"esp","",0));
-
- &bswap("eax") if $swap;
- &bswap("ebx") if $swap;
-
- &mov(&DWP(0,$out,"",0),"eax");
- &mov(&DWP(4,$out,"",0),"ebx");
-
- # eax and ebx are the next iv.
-
- &add($in, 8);
- &add($out, 8);
-
- &sub($count, 8);
- &jnz(&label("encrypt_loop"));
-
-###################################################################3
- &set_label("encrypt_finish");
- &mov($count, &wparam(2)); # length
- &and($count, 7);
- &jz(&label("finish"));
- &call(&label("PIC_point"));
-&set_label("PIC_point");
- &blindpop("edx");
- &lea("ecx",&DWP(&label("cbc_enc_jmp_table")."-".&label("PIC_point"),"edx"));
- &mov($count,&DWP(0,"ecx",$count,4))
- &add($count,"edx");
- &xor("ecx","ecx");
- &xor("edx","edx");
- #&mov($count,&DWP(&label("cbc_enc_jmp_table"),"",$count,4));
- &jmp_ptr($count);
-
-&set_label("ej7");
- &xor("edx", "edx") if $ppro; # ppro friendly
- &movb(&HB("edx"), &BP(6,$in,"",0));
- &shl("edx",8);
-&set_label("ej6");
- &movb(&HB("edx"), &BP(5,$in,"",0));
-&set_label("ej5");
- &movb(&LB("edx"), &BP(4,$in,"",0));
-&set_label("ej4");
- &mov("ecx", &DWP(0,$in,"",0));
- &jmp(&label("ejend"));
-&set_label("ej3");
- &movb(&HB("ecx"), &BP(2,$in,"",0));
- &xor("ecx", "ecx") if $ppro; # ppro friendly
- &shl("ecx",8);
-&set_label("ej2");
- &movb(&HB("ecx"), &BP(1,$in,"",0));
-&set_label("ej1");
- &movb(&LB("ecx"), &BP(0,$in,"",0));
-&set_label("ejend");
-
- &xor("eax", "ecx");
- &xor("ebx", "edx");
-
- &bswap("eax") if $swap;
- &bswap("ebx") if $swap;
-
- &mov(&DWP($data_off,"esp","",0), "eax"); # put in array for call
- &mov(&DWP($data_off+4,"esp","",0), "ebx"); #
-
- &call($enc_func);
-
- &mov("eax", &DWP($data_off,"esp","",0));
- &mov("ebx", &DWP($data_off+4,"esp","",0));
-
- &bswap("eax") if $swap;
- &bswap("ebx") if $swap;
-
- &mov(&DWP(0,$out,"",0),"eax");
- &mov(&DWP(4,$out,"",0),"ebx");
-
- &jmp(&label("finish"));
-
- #############################################################
- #############################################################
- &set_label("decrypt",1);
- # decrypt start
- &and($count,0xfffffff8);
- # The next 2 instructions are only for if the jz is taken
- &mov("eax", &DWP($data_off+8,"esp","",0)); # get iv[0]
- &mov("ebx", &DWP($data_off+12,"esp","",0)); # get iv[1]
- &jz(&label("decrypt_finish"));
-
- &set_label("decrypt_loop");
- &mov("eax", &DWP(0,$in,"",0)); # load first 4 bytes
- &mov("ebx", &DWP(4,$in,"",0)); # second 4 bytes
-
- &bswap("eax") if $swap;
- &bswap("ebx") if $swap;
-
- &mov(&DWP($data_off,"esp","",0), "eax"); # put back
- &mov(&DWP($data_off+4,"esp","",0), "ebx"); #
-
- &call($dec_func);
-
- &mov("eax", &DWP($data_off,"esp","",0)); # get return
- &mov("ebx", &DWP($data_off+4,"esp","",0)); #
-
- &bswap("eax") if $swap;
- &bswap("ebx") if $swap;
-
- &mov("ecx", &DWP($data_off+8,"esp","",0)); # get iv[0]
- &mov("edx", &DWP($data_off+12,"esp","",0)); # get iv[1]
-
- &xor("ecx", "eax");
- &xor("edx", "ebx");
-
- &mov("eax", &DWP(0,$in,"",0)); # get old cipher text,
- &mov("ebx", &DWP(4,$in,"",0)); # next iv actually
-
- &mov(&DWP(0,$out,"",0),"ecx");
- &mov(&DWP(4,$out,"",0),"edx");
-
- &mov(&DWP($data_off+8,"esp","",0), "eax"); # save iv
- &mov(&DWP($data_off+12,"esp","",0), "ebx"); #
-
- &add($in, 8);
- &add($out, 8);
-
- &sub($count, 8);
- &jnz(&label("decrypt_loop"));
-############################ ENDIT #######################3
- &set_label("decrypt_finish");
- &mov($count, &wparam(2)); # length
- &and($count, 7);
- &jz(&label("finish"));
-
- &mov("eax", &DWP(0,$in,"",0)); # load first 4 bytes
- &mov("ebx", &DWP(4,$in,"",0)); # second 4 bytes
-
- &bswap("eax") if $swap;
- &bswap("ebx") if $swap;
-
- &mov(&DWP($data_off,"esp","",0), "eax"); # put back
- &mov(&DWP($data_off+4,"esp","",0), "ebx"); #
-
- &call($dec_func);
-
- &mov("eax", &DWP($data_off,"esp","",0)); # get return
- &mov("ebx", &DWP($data_off+4,"esp","",0)); #
-
- &bswap("eax") if $swap;
- &bswap("ebx") if $swap;
-
- &mov("ecx", &DWP($data_off+8,"esp","",0)); # get iv[0]
- &mov("edx", &DWP($data_off+12,"esp","",0)); # get iv[1]
-
- &xor("ecx", "eax");
- &xor("edx", "ebx");
-
- # this is for when we exit
- &mov("eax", &DWP(0,$in,"",0)); # get old cipher text,
- &mov("ebx", &DWP(4,$in,"",0)); # next iv actually
-
-&set_label("dj7");
- &rotr("edx", 16);
- &movb(&BP(6,$out,"",0), &LB("edx"));
- &shr("edx",16);
-&set_label("dj6");
- &movb(&BP(5,$out,"",0), &HB("edx"));
-&set_label("dj5");
- &movb(&BP(4,$out,"",0), &LB("edx"));
-&set_label("dj4");
- &mov(&DWP(0,$out,"",0), "ecx");
- &jmp(&label("djend"));
-&set_label("dj3");
- &rotr("ecx", 16);
- &movb(&BP(2,$out,"",0), &LB("ecx"));
- &shl("ecx",16);
-&set_label("dj2");
- &movb(&BP(1,$in,"",0), &HB("ecx"));
-&set_label("dj1");
- &movb(&BP(0,$in,"",0), &LB("ecx"));
-&set_label("djend");
-
- # final iv is still in eax:ebx
- &jmp(&label("finish"));
-
-
-############################ FINISH #######################3
- &set_label("finish",1);
- &mov("ecx", &wparam($iv_off)); # Get iv ptr
-
- #################################################
- $total=16+4;
- $total+=4 if ($p1 > 0);
- $total+=4 if ($p2 > 0);
- $total+=4 if ($p3 > 0);
- &add("esp",$total);
-
- &mov(&DWP(0,"ecx","",0), "eax"); # save iv
- &mov(&DWP(4,"ecx","",0), "ebx"); # save iv
-
- &function_end_A($name);
-
- &set_label("cbc_enc_jmp_table",1);
- &data_word("0");
- &data_word(&label("ej1")."-".&label("PIC_point"));
- &data_word(&label("ej2")."-".&label("PIC_point"));
- &data_word(&label("ej3")."-".&label("PIC_point"));
- &data_word(&label("ej4")."-".&label("PIC_point"));
- &data_word(&label("ej5")."-".&label("PIC_point"));
- &data_word(&label("ej6")."-".&label("PIC_point"));
- &data_word(&label("ej7")."-".&label("PIC_point"));
- # not used
- #&set_label("cbc_dec_jmp_table",1);
- #&data_word("0");
- #&data_word(&label("dj1")."-".&label("PIC_point"));
- #&data_word(&label("dj2")."-".&label("PIC_point"));
- #&data_word(&label("dj3")."-".&label("PIC_point"));
- #&data_word(&label("dj4")."-".&label("PIC_point"));
- #&data_word(&label("dj5")."-".&label("PIC_point"));
- #&data_word(&label("dj6")."-".&label("PIC_point"));
- #&data_word(&label("dj7")."-".&label("PIC_point"));
-
- &function_end_B($name);
-
- }
-
-1;
projects / bcm963xx.git / blobdiff