You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
352 lines
9.0 KiB
352 lines
9.0 KiB
14 years ago
|
#!/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);
|
||
|
|
|
||
|
|
&align(64);
|
||
|
|
&set_label("cbc_enc_jmp_table");
|
||
|
|
&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"));
|
||
|
|
&align(64);
|
||
|
|
|
||
|
|
&function_end_B($name);
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
1;
|