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&mov (&DWP(0,$acc),$s0); # write output data
&mov (&DWP(4,$acc),$s1);
&mov (&DWP(8,$acc),$s2);
&mov (&DWP(12,$acc),$s3);
&function_end("AES_decrypt");
# void AES_cbc_encrypt (const void char *inp, unsigned char *out,
# size_t length, const AES_KEY *key,
# unsigned char *ivp,const int enc);
{
# stack frame layout
# -4(%esp) # return address 0(%esp)
# 0(%esp) # s0 backing store 4(%esp)
# 4(%esp) # s1 backing store 8(%esp)
# 8(%esp) # s2 backing store 12(%esp)
# 12(%esp) # s3 backing store 16(%esp)
# 16(%esp) # key backup 20(%esp)
# 20(%esp) # end of key schedule 24(%esp)
# 24(%esp) # %ebp backup 28(%esp)
# 28(%esp) # %esp backup
my $_inp=&DWP(32,"esp"); # copy of wparam(0)
my $_out=&DWP(36,"esp"); # copy of wparam(1)
my $_len=&DWP(40,"esp"); # copy of wparam(2)
my $_key=&DWP(44,"esp"); # copy of wparam(3)
my $_ivp=&DWP(48,"esp"); # copy of wparam(4)
my $_tmp=&DWP(52,"esp"); # volatile variable
#
my $ivec=&DWP(60,"esp"); # ivec[16]
my $aes_key=&DWP(76,"esp"); # copy of aes_key
my $mark=&DWP(76+240,"esp"); # copy of aes_key->rounds
&function_begin("AES_cbc_encrypt");
&mov ($s2 eq "ecx"? $s2 : "",&wparam(2)); # load len
&cmp ($s2,0);
&je (&label("drop_out"));
&call (&label("pic_point")); # make it PIC!
&set_label("pic_point");
&blindpop($tbl);
&picmeup($s0,"OPENSSL_ia32cap_P",$tbl,&label("pic_point")) if(!$x86only);
&cmp (&wparam(5),0);
&lea ($tbl,&DWP(&label("AES_Te")."-".&label("pic_point"),$tbl));
&jne (&label("picked_te"));
&lea ($tbl,&DWP(&label("AES_Td")."-".&label("AES_Te"),$tbl));
&set_label("picked_te");
# one can argue if this is required
&pushf ();
&cld ();
&cmp ($s2,$speed_limit);
&jb (&label("slow_way"));
&test ($s2,15);
&jnz (&label("slow_way"));
if (!$x86only) {
&bt (&DWP(0,$s0),28); # check for hyper-threading bit
&jc (&label("slow_way"));
}
# pre-allocate aligned stack frame...
&lea ($acc,&DWP(-80-244,"esp"));
&and ($acc,-64);
# ... and make sure it doesn't alias with $tbl modulo 4096
&mov ($s0,$tbl);
&lea ($s1,&DWP(2048+256,$tbl));
&mov ($s3,$acc);
&and ($s0,0xfff); # s = %ebp&0xfff
&and ($s1,0xfff); # e = (%ebp+2048+256)&0xfff
&and ($s3,0xfff); # p = %esp&0xfff
&cmp ($s3,$s1); # if (p>=e) %esp =- (p-e);
&jb (&label("tbl_break_out"));
&sub ($s3,$s1);
&sub ($acc,$s3);
&jmp (&label("tbl_ok"));
&set_label("tbl_break_out",4); # else %esp -= (p-s)&0xfff + framesz;
&sub ($s3,$s0);
&and ($s3,0xfff);
&add ($s3,384);
&sub ($acc,$s3);
&set_label("tbl_ok",4);
&lea ($s3,&wparam(0)); # obtain pointer to parameter block
&exch ("esp",$acc); # allocate stack frame
&add ("esp",4); # reserve for return address!
&mov ($_tbl,$tbl); # save %ebp
&mov ($_esp,$acc); # save %esp
&mov ($s0,&DWP(0,$s3)); # load inp
&mov ($s1,&DWP(4,$s3)); # load out
#&mov ($s2,&DWP(8,$s3)); # load len
&mov ($key,&DWP(12,$s3)); # load key
&mov ($acc,&DWP(16,$s3)); # load ivp
&mov ($s3,&DWP(20,$s3)); # load enc flag
&mov ($_inp,$s0); # save copy of inp
&mov ($_out,$s1); # save copy of out
&mov ($_len,$s2); # save copy of len
&mov ($_key,$key); # save copy of key
&mov ($_ivp,$acc); # save copy of ivp
&mov ($mark,0); # copy of aes_key->rounds = 0;
# do we copy key schedule to stack?
&mov ($s1 eq "ebx" ? $s1 : "",$key);
&mov ($s2 eq "ecx" ? $s2 : "",244/4);
&sub ($s1,$tbl);
&mov ("esi",$key);
&and ($s1,0xfff);
&lea ("edi",$aes_key);
&cmp ($s1,2048+256);
&jb (&label("do_copy"));
&cmp ($s1,4096-244);
&jb (&label("skip_copy"));
&set_label("do_copy",4);
&mov ($_key,"edi");
&data_word(0xA5F3F689); # rep movsd
&set_label("skip_copy");
&mov ($key,16);
&set_label("prefetch_tbl",4);
&mov ($s0,&DWP(0,$tbl));
&mov ($s1,&DWP(32,$tbl));
&mov ($s2,&DWP(64,$tbl));
&mov ($acc,&DWP(96,$tbl));
&lea ($tbl,&DWP(128,$tbl));
&sub ($key,1);
&jnz (&label("prefetch_tbl"));
&sub ($tbl,2048);
&mov ($acc,$_inp);
&mov ($key,$_ivp);
&cmp ($s3,0);
&je (&label("fast_decrypt"));
#----------------------------- ENCRYPT -----------------------------#
&mov ($s0,&DWP(0,$key)); # load iv
&mov ($s1,&DWP(4,$key));
&set_label("fast_enc_loop",16);
&mov ($s2,&DWP(8,$key));
&mov ($s3,&DWP(12,$key));
&xor ($s0,&DWP(0,$acc)); # xor input data
&xor ($s1,&DWP(4,$acc));
&xor ($s2,&DWP(8,$acc));
&xor ($s3,&DWP(12,$acc));
&mov ($key,$_key); # load key
&call ("_x86_AES_encrypt");
&mov ($acc,$_inp); # load inp
&mov ($key,$_out); # load out
&mov (&DWP(0,$key),$s0); # save output data
&mov (&DWP(4,$key),$s1);
&mov (&DWP(8,$key),$s2);
&mov (&DWP(12,$key),$s3);
&lea ($acc,&DWP(16,$acc)); # advance inp
&mov ($s2,$_len); # load len
&mov ($_inp,$acc); # save inp
&lea ($s3,&DWP(16,$key)); # advance out
&mov ($_out,$s3); # save out
&sub ($s2,16); # decrease len
&mov ($_len,$s2); # save len
&jnz (&label("fast_enc_loop"));
&mov ($acc,$_ivp); # load ivp
&mov ($s2,&DWP(8,$key)); # restore last 2 dwords
&mov ($s3,&DWP(12,$key));
&mov (&DWP(0,$acc),$s0); # save ivec
&mov (&DWP(4,$acc),$s1);
&mov (&DWP(8,$acc),$s2);
&mov (&DWP(12,$acc),$s3);
&cmp ($mark,0); # was the key schedule copied?
&mov ("edi",$_key);
&je (&label("skip_ezero"));
# zero copy of key schedule
&mov ("ecx",240/4);
&xor ("eax","eax");
&align (4);
&data_word(0xABF3F689); # rep stosd
&set_label("skip_ezero")
&mov ("esp",$_esp);
&popf ();
&set_label("drop_out");
&function_end_A();
&pushf (); # kludge, never executed
#----------------------------- DECRYPT -----------------------------#
&set_label("fast_decrypt",16);
&cmp ($acc,$_out);
&je (&label("fast_dec_in_place")); # in-place processing...
&mov ($_tmp,$key);
&align (4);
&set_label("fast_dec_loop",16);
&mov ($s0,&DWP(0,$acc)); # read input
&mov ($s1,&DWP(4,$acc));
&mov ($s2,&DWP(8,$acc));
&mov ($s3,&DWP(12,$acc));
&mov ($key,$_key); # load key
&call ("_x86_AES_decrypt");
&mov ($key,$_tmp); # load ivp
&mov ($acc,$_len); # load len
&xor ($s0,&DWP(0,$key)); # xor iv
&xor ($s1,&DWP(4,$key));
&xor ($s2,&DWP(8,$key));
&xor ($s3,&DWP(12,$key));
&mov ($key,$_out); # load out
&mov ($acc,$_inp); # load inp
&mov (&DWP(0,$key),$s0); # write output
&mov (&DWP(4,$key),$s1);
&mov (&DWP(8,$key),$s2);
&mov (&DWP(12,$key),$s3);
&mov ($s2,$_len); # load len
&mov ($_tmp,$acc); # save ivp
&lea ($acc,&DWP(16,$acc)); # advance inp
&mov ($_inp,$acc); # save inp
&lea ($key,&DWP(16,$key)); # advance out
&mov ($_out,$key); # save out
&sub ($s2,16); # decrease len
&mov ($_len,$s2); # save len
&jnz (&label("fast_dec_loop"));
&mov ($key,$_tmp); # load temp ivp
&mov ($acc,$_ivp); # load user ivp
&mov ($s0,&DWP(0,$key)); # load iv
&mov ($s1,&DWP(4,$key));
&mov ($s2,&DWP(8,$key));
&mov ($s3,&DWP(12,$key));
&mov (&DWP(0,$acc),$s0); # copy back to user
&mov (&DWP(4,$acc),$s1);
&mov (&DWP(8,$acc),$s2);
&mov (&DWP(12,$acc),$s3);
&jmp (&label("fast_dec_out"));
&set_label("fast_dec_in_place",16);
&set_label("fast_dec_in_place_loop");
&mov ($s0,&DWP(0,$acc)); # read input
&mov ($s1,&DWP(4,$acc));
&mov ($s2,&DWP(8,$acc));
&mov ($s3,&DWP(12,$acc));
&lea ($key,$ivec);
&mov (&DWP(0,$key),$s0); # copy to temp
&mov (&DWP(4,$key),$s1);
&mov (&DWP(8,$key),$s2);
&mov (&DWP(12,$key),$s3);
&mov ($key,$_key); # load key
&call ("_x86_AES_decrypt");
&mov ($key,$_ivp); # load ivp
&mov ($acc,$_out); # load out
&xor ($s0,&DWP(0,$key)); # xor iv
&xor ($s1,&DWP(4,$key));
&xor ($s2,&DWP(8,$key));
&xor ($s3,&DWP(12,$key));
&mov (&DWP(0,$acc),$s0); # write output
&mov (&DWP(4,$acc),$s1);
&mov (&DWP(8,$acc),$s2);
&mov (&DWP(12,$acc),$s3);
&lea ($acc,&DWP(16,$acc)); # advance out
&mov ($_out,$acc); # save out
&lea ($acc,$ivec);
&mov ($s0,&DWP(0,$acc)); # read temp
&mov ($s1,&DWP(4,$acc));
&mov ($s2,&DWP(8,$acc));
&mov ($s3,&DWP(12,$acc));
&mov (&DWP(0,$key),$s0); # copy iv
&mov (&DWP(4,$key),$s1);
&mov (&DWP(8,$key),$s2);
&mov (&DWP(12,$key),$s3);
&mov ($acc,$_inp); # load inp
&mov ($s2,$_len); # load len
&lea ($acc,&DWP(16,$acc)); # advance inp
&mov ($_inp,$acc); # save inp
&sub ($s2,16); # decrease len
&mov ($_len,$s2); # save len
&jnz (&label("fast_dec_in_place_loop"));
&set_label("fast_dec_out",4);
&cmp ($mark,0); # was the key schedule copied?
&mov ("edi",$_key);
&je (&label("skip_dzero"));
# zero copy of key schedule
&mov ("ecx",240/4);
&xor ("eax","eax");
&align (4);
&data_word(0xABF3F689); # rep stosd
&set_label("skip_dzero")
&mov ("esp",$_esp);
&popf ();
&function_end_A();
&pushf (); # kludge, never executed
#--------------------------- SLOW ROUTINE ---------------------------#
&set_label("slow_way",16);
&mov ($s0,&DWP(0,$s0)) if (!$x86only);# load OPENSSL_ia32cap
&mov ($key,&wparam(3)); # load key
# pre-allocate aligned stack frame...
&lea ($acc,&DWP(-80,"esp"));
&and ($acc,-64);
# ... and make sure it doesn't alias with $key modulo 1024
&lea ($s1,&DWP(-80-63,$key));
&sub ($s1,$acc);
&neg ($s1);
&and ($s1,0x3C0); # modulo 1024, but aligned to cache-line
&sub ($acc,$s1);
# pick S-box copy which can't overlap with stack frame or $key
&lea ($s1,&DWP(768,$acc));
&sub ($s1,$tbl);
&and ($s1,0x300);
&lea ($tbl,&DWP(2048+128,$tbl,$s1));
&lea ($s3,&wparam(0)); # pointer to parameter block
&exch ("esp",$acc);
&add ("esp",4); # reserve for return address!
&mov ($_tbl,$tbl); # save %ebp
&mov ($_esp,$acc); # save %esp
&mov ($_tmp,$s0); # save OPENSSL_ia32cap
&mov ($s0,&DWP(0,$s3)); # load inp
&mov ($s1,&DWP(4,$s3)); # load out
#&mov ($s2,&DWP(8,$s3)); # load len
#&mov ($key,&DWP(12,$s3)); # load key
&mov ($acc,&DWP(16,$s3)); # load ivp
&mov ($s3,&DWP(20,$s3)); # load enc flag
&mov ($_inp,$s0); # save copy of inp
&mov ($_out,$s1); # save copy of out
&mov ($_len,$s2); # save copy of len
&mov ($_key,$key); # save copy of key
&mov ($_ivp,$acc); # save copy of ivp
&mov ($key,$acc);
&mov ($acc,$s0);
&cmp ($s3,0);
&je (&label("slow_decrypt"));
#--------------------------- SLOW ENCRYPT ---------------------------#
&cmp ($s2,16);
&mov ($s3,$s1);
&jb (&label("slow_enc_tail"));
if (!$x86only) {
&bt ($_tmp,25); # check for SSE bit
&jnc (&label("slow_enc_x86"));
&movq ("mm0",&QWP(0,$key)); # load iv
&movq ("mm4",&QWP(8,$key));
&set_label("slow_enc_loop_sse",16);
&pxor ("mm0",&QWP(0,$acc)); # xor input data
&pxor ("mm4",&QWP(8,$acc));
&mov ($key,$_key);
&call ("_sse_AES_encrypt_compact");
&mov ($acc,$_inp); # load inp
&mov ($key,$_out); # load out
&mov ($s2,$_len); # load len
&movq (&QWP(0,$key),"mm0"); # save output data
&movq (&QWP(8,$key),"mm4");
&lea ($acc,&DWP(16,$acc)); # advance inp
&mov ($_inp,$acc); # save inp
&lea ($s3,&DWP(16,$key)); # advance out
&mov ($_out,$s3); # save out
&sub ($s2,16); # decrease len
&cmp ($s2,16);
&mov ($_len,$s2); # save len
&jae (&label("slow_enc_loop_sse"));
&test ($s2,15);
&jnz (&label("slow_enc_tail"));
&mov ($acc,$_ivp); # load ivp
&movq (&QWP(0,$acc),"mm0"); # save ivec
&movq (&QWP(8,$acc),"mm4");
&emms ();
&mov ("esp",$_esp);
&popf ();
&function_end_A();
&pushf (); # kludge, never executed
}
&set_label("slow_enc_x86",16);
&mov ($s0,&DWP(0,$key)); # load iv
&mov ($s1,&DWP(4,$key));
&set_label("slow_enc_loop_x86",4);
&mov ($s2,&DWP(8,$key));
&mov ($s3,&DWP(12,$key));
&xor ($s0,&DWP(0,$acc)); # xor input data
&xor ($s1,&DWP(4,$acc));
&xor ($s2,&DWP(8,$acc));
&xor ($s3,&DWP(12,$acc));
&mov ($key,$_key); # load key
&call ("_x86_AES_encrypt_compact");
&mov ($acc,$_inp); # load inp
&mov ($key,$_out); # load out
&mov (&DWP(0,$key),$s0); # save output data
&mov (&DWP(4,$key),$s1);
&mov (&DWP(8,$key),$s2);
&mov (&DWP(12,$key),$s3);
&mov ($s2,$_len); # load len
&lea ($acc,&DWP(16,$acc)); # advance inp
&mov ($_inp,$acc); # save inp
&lea ($s3,&DWP(16,$key)); # advance out
&mov ($_out,$s3); # save out
&sub ($s2,16); # decrease len
&cmp ($s2,16);
&mov ($_len,$s2); # save len
&jae (&label("slow_enc_loop_x86"));
&test ($s2,15);
&jnz (&label("slow_enc_tail"));
&mov ($acc,$_ivp); # load ivp
&mov ($s2,&DWP(8,$key)); # restore last dwords
&mov ($s3,&DWP(12,$key));
&mov (&DWP(0,$acc),$s0); # save ivec
&mov (&DWP(4,$acc),$s1);
&mov (&DWP(8,$acc),$s2);
&mov (&DWP(12,$acc),$s3);
&mov ("esp",$_esp);
&popf ();
&function_end_A();
&pushf (); # kludge, never executed
&set_label("slow_enc_tail",16);
&emms () if (!$x86only);
&mov ($key eq "edi"? $key:"",$s3); # load out to edi
&mov ($s1,16);
&sub ($s1,$s2);
&cmp ($key,$acc eq "esi"? $acc:""); # compare with inp
&je (&label("enc_in_place"));
&align (4);
&data_word(0xA4F3F689); # rep movsb # copy input
&jmp (&label("enc_skip_in_place"));
&set_label("enc_in_place");
&lea ($key,&DWP(0,$key,$s2));
&set_label("enc_skip_in_place");
&mov ($s2,$s1);
&xor ($s0,$s0);
&align (4);
&data_word(0xAAF3F689); # rep stosb # zero tail
&mov ($key,$_ivp); # restore ivp
&mov ($acc,$s3); # output as input
&mov ($s0,&DWP(0,$key));
&mov ($s1,&DWP(4,$key));
&mov ($_len,16); # len=16
&jmp (&label("slow_enc_loop_x86")); # one more spin...
#--------------------------- SLOW DECRYPT ---------------------------#
&set_label("slow_decrypt",16);
if (!$x86only) {
&bt ($_tmp,25); # check for SSE bit
&jnc (&label("slow_dec_loop_x86"));
&set_label("slow_dec_loop_sse",4);
&movq ("mm0",&QWP(0,$acc)); # read input
&movq ("mm4",&QWP(8,$acc));
&mov ($key,$_key);
&call ("_sse_AES_decrypt_compact");
&mov ($acc,$_inp); # load inp
&lea ($s0,$ivec);
&mov ($s1,$_out); # load out
&mov ($s2,$_len); # load len
&mov ($key,$_ivp); # load ivp
&movq ("mm1",&QWP(0,$acc)); # re-read input
&movq ("mm5",&QWP(8,$acc));
&pxor ("mm0",&QWP(0,$key)); # xor iv
&pxor ("mm4",&QWP(8,$key));
&movq (&QWP(0,$key),"mm1"); # copy input to iv
&movq (&QWP(8,$key),"mm5");
&sub ($s2,16); # decrease len
&jc (&label("slow_dec_partial_sse"));
&movq (&QWP(0,$s1),"mm0"); # write output
&movq (&QWP(8,$s1),"mm4");
&lea ($s1,&DWP(16,$s1)); # advance out
&mov ($_out,$s1); # save out
&lea ($acc,&DWP(16,$acc)); # advance inp
&mov ($_inp,$acc); # save inp
&mov ($_len,$s2); # save len
&jnz (&label("slow_dec_loop_sse"));
&emms ();
&mov ("esp",$_esp);
&popf ();
&function_end_A();
&pushf (); # kludge, never executed
&set_label("slow_dec_partial_sse",16);
&movq (&QWP(0,$s0),"mm0"); # save output to temp
&movq (&QWP(8,$s0),"mm4");
&emms ();
&add ($s2 eq "ecx" ? "ecx":"",16);
&mov ("edi",$s1); # out
&mov ("esi",$s0); # temp
&align (4);
&data_word(0xA4F3F689); # rep movsb # copy partial output
&mov ("esp",$_esp);
&popf ();
&function_end_A();
&pushf (); # kludge, never executed
}
&set_label("slow_dec_loop_x86",16);
&mov ($s0,&DWP(0,$acc)); # read input
&mov ($s1,&DWP(4,$acc));
&mov ($s2,&DWP(8,$acc));
&mov ($s3,&DWP(12,$acc));
&lea ($key,$ivec);
&mov (&DWP(0,$key),$s0); # copy to temp
&mov (&DWP(4,$key),$s1);
&mov (&DWP(8,$key),$s2);
&mov (&DWP(12,$key),$s3);
&mov ($key,$_key); # load key
&call ("_x86_AES_decrypt_compact");
&mov ($key,$_ivp); # load ivp
&mov ($acc,$_len); # load len
&xor ($s0,&DWP(0,$key)); # xor iv
&xor ($s1,&DWP(4,$key));
&xor ($s2,&DWP(8,$key));
&xor ($s3,&DWP(12,$key));
&sub ($acc,16);
&jc (&label("slow_dec_partial_x86"));
&mov ($_len,$acc); # save len
&mov ($acc,$_out); # load out
&mov (&DWP(0,$acc),$s0); # write output
&mov (&DWP(4,$acc),$s1);
&mov (&DWP(8,$acc),$s2);
&mov (&DWP(12,$acc),$s3);
&lea ($acc,&DWP(16,$acc)); # advance out
&mov ($_out,$acc); # save out
&lea ($acc,$ivec);
&mov ($s0,&DWP(0,$acc)); # read temp
&mov ($s1,&DWP(4,$acc));
&mov ($s2,&DWP(8,$acc));
&mov ($s3,&DWP(12,$acc));
&mov (&DWP(0,$key),$s0); # copy it to iv
&mov (&DWP(4,$key),$s1);
&mov (&DWP(8,$key),$s2);
&mov (&DWP(12,$key),$s3);
&mov ($acc,$_inp); # load inp
&lea ($acc,&DWP(16,$acc)); # advance inp
&mov ($_inp,$acc); # save inp
&jnz (&label("slow_dec_loop_x86"));
&mov ("esp",$_esp);
&popf ();
&function_end_A();
&pushf (); # kludge, never executed
&set_label("slow_dec_partial_x86",16);
&lea ($acc,$ivec);
&mov (&DWP(0,$acc),$s0); # save output to temp
&mov (&DWP(4,$acc),$s1);
&mov (&DWP(8,$acc),$s2);
&mov (&DWP(12,$acc),$s3);
&mov ($acc,$_inp);
&mov ($s0,&DWP(0,$acc)); # re-read input
&mov ($s1,&DWP(4,$acc));
&mov ($s2,&DWP(8,$acc));
&mov ($s3,&DWP(12,$acc));
&mov (&DWP(0,$key),$s0); # copy it to iv
&mov (&DWP(4,$key),$s1);
&mov (&DWP(8,$key),$s2);
&mov (&DWP(12,$key),$s3);
&mov ("ecx",$_len);
&mov ("edi",$_out);
&lea ("esi",$ivec);
&align (4);
&data_word(0xA4F3F689); # rep movsb # copy partial output
&mov ("esp",$_esp);
&popf ();
&function_end("AES_cbc_encrypt");
}
#------------------------------------------------------------------#
sub enckey()
{
&movz ("esi",&LB("edx")); # rk[i]>>0
&movz ("ebx",&BP(-128,$tbl,"esi",1));
&movz ("esi",&HB("edx")); # rk[i]>>8
&shl ("ebx",24);
&xor ("eax","ebx");
&movz ("ebx",&BP(-128,$tbl,"esi",1));
&shr ("edx",16);
&movz ("esi",&LB("edx")); # rk[i]>>16
&xor ("eax","ebx");
&movz ("ebx",&BP(-128,$tbl,"esi",1));
&movz ("esi",&HB("edx")); # rk[i]>>24
&shl ("ebx",8);
&xor ("eax","ebx");
&movz ("ebx",&BP(-128,$tbl,"esi",1));
&shl ("ebx",16);
&xor ("eax","ebx");
&xor ("eax",&DWP(1024-128,$tbl,"ecx",4)); # rcon
}
&function_begin("_x86_AES_set_encrypt_key");
&mov ("esi",&wparam(1)); # user supplied key
&mov ("edi",&wparam(3)); # private key schedule
&test ("esi",-1);
&jz (&label("badpointer"));
&test ("edi",-1);
&jz (&label("badpointer"));
&call (&label("pic_point"));
&set_label("pic_point");
&blindpop($tbl);
&lea ($tbl,&DWP(&label("AES_Te")."-".&label("pic_point"),$tbl));
&lea ($tbl,&DWP(2048+128,$tbl));
# prefetch Te4
&mov ("eax",&DWP(0-128,$tbl));
&mov ("ebx",&DWP(32-128,$tbl));
&mov ("ecx",&DWP(64-128,$tbl));
&mov ("edx",&DWP(96-128,$tbl));
&mov ("eax",&DWP(128-128,$tbl));
&mov ("ebx",&DWP(160-128,$tbl));
&mov ("ecx",&DWP(192-128,$tbl));
&mov ("edx",&DWP(224-128,$tbl));
&mov ("ecx",&wparam(2)); # number of bits in key
&cmp ("ecx",128);
&je (&label("10rounds"));
&cmp ("ecx",192);
&je (&label("12rounds"));
&cmp ("ecx",256);
&je (&label("14rounds"));
&mov ("eax",-2); # invalid number of bits
&jmp (&label("exit"));
&set_label("10rounds");
&mov ("eax",&DWP(0,"esi")); # copy first 4 dwords
&mov ("ebx",&DWP(4,"esi"));
&mov ("ecx",&DWP(8,"esi"));
&mov ("edx",&DWP(12,"esi"));
&mov (&DWP(0,"edi"),"eax");
&mov (&DWP(4,"edi"),"ebx");
&mov (&DWP(8,"edi"),"ecx");
&mov (&DWP(12,"edi"),"edx");
&xor ("ecx","ecx");
&jmp (&label("10shortcut"));
&align (4);
&set_label("10loop");
&mov ("eax",&DWP(0,"edi")); # rk[0]
&mov ("edx",&DWP(12,"edi")); # rk[3]
&set_label("10shortcut");
&enckey ();
&mov (&DWP(16,"edi"),"eax"); # rk[4]
&xor ("eax",&DWP(4,"edi"));
&mov (&DWP(20,"edi"),"eax"); # rk[5]
&xor ("eax",&DWP(8,"edi"));
&mov (&DWP(24,"edi"),"eax"); # rk[6]
&xor ("eax",&DWP(12,"edi"));
&mov (&DWP(28,"edi"),"eax"); # rk[7]
&inc ("ecx");
&add ("edi",16);
&cmp ("ecx",10);
&jl (&label("10loop"));
&mov (&DWP(80,"edi"),10); # setup number of rounds
&xor ("eax","eax");
&jmp (&label("exit"));
&set_label("12rounds");
&mov ("eax",&DWP(0,"esi")); # copy first 6 dwords
&mov ("ebx",&DWP(4,"esi"));
&mov ("ecx",&DWP(8,"esi"));
&mov ("edx",&DWP(12,"esi"));
&mov (&DWP(0,"edi"),"eax");
&mov (&DWP(4,"edi"),"ebx");
&mov (&DWP(8,"edi"),"ecx");
&mov (&DWP(12,"edi"),"edx");
&mov ("ecx",&DWP(16,"esi"));
&mov ("edx",&DWP(20,"esi"));
&mov (&DWP(16,"edi"),"ecx");
&mov (&DWP(20,"edi"),"edx");
&xor ("ecx","ecx");
&jmp (&label("12shortcut"));
&align (4);
&set_label("12loop");
&mov ("eax",&DWP(0,"edi")); # rk[0]
&mov ("edx",&DWP(20,"edi")); # rk[5]
&set_label("12shortcut");
&enckey ();
&mov (&DWP(24,"edi"),"eax"); # rk[6]
&xor ("eax",&DWP(4,"edi"));
&mov (&DWP(28,"edi"),"eax"); # rk[7]
&xor ("eax",&DWP(8,"edi"));
&mov (&DWP(32,"edi"),"eax"); # rk[8]
&xor ("eax",&DWP(12,"edi"));
&mov (&DWP(36,"edi"),"eax"); # rk[9]
&cmp ("ecx",7);
&je (&label("12break"));
&inc ("ecx");
&xor ("eax",&DWP(16,"edi"));
&mov (&DWP(40,"edi"),"eax"); # rk[10]
&xor ("eax",&DWP(20,"edi"));
&mov (&DWP(44,"edi"),"eax"); # rk[11]
&add ("edi",24);
&jmp (&label("12loop"));
&set_label("12break");
&mov (&DWP(72,"edi"),12); # setup number of rounds
&xor ("eax","eax");
&jmp (&label("exit"));
&set_label("14rounds");
&mov ("eax",&DWP(0,"esi")); # copy first 8 dwords
&mov ("ebx",&DWP(4,"esi"));
&mov ("ecx",&DWP(8,"esi"));
&mov ("edx",&DWP(12,"esi"));
&mov (&DWP(0,"edi"),"eax");
&mov (&DWP(4,"edi"),"ebx");
&mov (&DWP(8,"edi"),"ecx");
&mov (&DWP(12,"edi"),"edx");
&mov ("eax",&DWP(16,"esi"));
&mov ("ebx",&DWP(20,"esi"));
&mov ("ecx",&DWP(24,"esi"));
&mov ("edx",&DWP(28,"esi"));
&mov (&DWP(16,"edi"),"eax");
&mov (&DWP(20,"edi"),"ebx");
&mov (&DWP(24,"edi"),"ecx");
&mov (&DWP(28,"edi"),"edx");
&xor ("ecx","ecx");
&jmp (&label("14shortcut"));
&align (4);
&set_label("14loop");
&mov ("edx",&DWP(28,"edi")); # rk[7]
&set_label("14shortcut");
&mov ("eax",&DWP(0,"edi")); # rk[0]
&enckey ();
&mov (&DWP(32,"edi"),"eax"); # rk[8]
&xor ("eax",&DWP(4,"edi"));
&mov (&DWP(36,"edi"),"eax"); # rk[9]
&xor ("eax",&DWP(8,"edi"));
&mov (&DWP(40,"edi"),"eax"); # rk[10]
&xor ("eax",&DWP(12,"edi"));
&mov (&DWP(44,"edi"),"eax"); # rk[11]
&cmp ("ecx",6);
&je (&label("14break"));
&inc ("ecx");
&mov ("edx","eax");
&mov ("eax",&DWP(16,"edi")); # rk[4]
&movz ("esi",&LB("edx")); # rk[11]>>0
&movz ("ebx",&BP(-128,$tbl,"esi",1));
&movz ("esi",&HB("edx")); # rk[11]>>8
&xor ("eax","ebx");
&movz ("ebx",&BP(-128,$tbl,"esi",1));
&shr ("edx",16);
&shl ("ebx",8);
&movz ("esi",&LB("edx")); # rk[11]>>16
&xor ("eax","ebx");
&movz ("ebx",&BP(-128,$tbl,"esi",1));
&movz ("esi",&HB("edx")); # rk[11]>>24
&shl ("ebx",16);
&xor ("eax","ebx");
&movz ("ebx",&BP(-128,$tbl,"esi",1));
&shl ("ebx",24);
&xor ("eax","ebx");
&mov (&DWP(48,"edi"),"eax"); # rk[12]
&xor ("eax",&DWP(20,"edi"));
&mov (&DWP(52,"edi"),"eax"); # rk[13]
&xor ("eax",&DWP(24,"edi"));
&mov (&DWP(56,"edi"),"eax"); # rk[14]
&xor ("eax",&DWP(28,"edi"));
&mov (&DWP(60,"edi"),"eax"); # rk[15]
&add ("edi",32);
&jmp (&label("14loop"));
&set_label("14break");
&mov (&DWP(48,"edi"),14); # setup number of rounds
&xor ("eax","eax");
&jmp (&label("exit"));
&set_label("badpointer");
&mov ("eax",-1);
&set_label("exit");
&function_end("_x86_AES_set_encrypt_key");
# int private_AES_set_encrypt_key(const unsigned char *userKey, const int bits,
# AES_KEY *key)
&function_begin_B("private_AES_set_encrypt_key");
&call ("_x86_AES_set_encrypt_key");
&ret ();
&function_end_B("private_AES_set_encrypt_key");
sub deckey()
{ my ($i,$key,$tp1,$tp2,$tp4,$tp8) = @_;
my $tmp = $tbl;
&mov ($acc,$tp1);
&and ($acc,0x80808080);
&mov ($tmp,$acc);
&shr ($tmp,7);
&lea ($tp2,&DWP(0,$tp1,$tp1));
&sub ($acc,$tmp);
&and ($tp2,0xfefefefe);
&and ($acc,0x1b1b1b1b);
&xor ($acc,$tp2);
&mov ($tp2,$acc);
&and ($acc,0x80808080);
&mov ($tmp,$acc);
&shr ($tmp,7);
&lea ($tp4,&DWP(0,$tp2,$tp2));
&sub ($acc,$tmp);
&and ($tp4,0xfefefefe);
&and ($acc,0x1b1b1b1b);
&xor ($tp2,$tp1); # tp2^tp1
&xor ($acc,$tp4);
&mov ($tp4,$acc);
&and ($acc,0x80808080);
&mov ($tmp,$acc);
&shr ($tmp,7);
&lea ($tp8,&DWP(0,$tp4,$tp4));
&xor ($tp4,$tp1); # tp4^tp1
&sub ($acc,$tmp);
&and ($tp8,0xfefefefe);
&and ($acc,0x1b1b1b1b);
&rotl ($tp1,8); # = ROTATE(tp1,8)
&xor ($tp8,$acc);
&mov ($tmp,&DWP(4*($i+1),$key)); # modulo-scheduled load
&xor ($tp1,$tp2);
&xor ($tp2,$tp8);
&xor ($tp1,$tp4);
&rotl ($tp2,24);
&xor ($tp4,$tp8);
&xor ($tp1,$tp8); # ^= tp8^(tp4^tp1)^(tp2^tp1)
&rotl ($tp4,16);
&xor ($tp1,$tp2); # ^= ROTATE(tp8^tp2^tp1,24)
&rotl ($tp8,8);
&xor ($tp1,$tp4); # ^= ROTATE(tp8^tp4^tp1,16)
&mov ($tp2,$tmp);
&xor ($tp1,$tp8); # ^= ROTATE(tp8,8)
&mov (&DWP(4*$i,$key),$tp1);
}
# int private_AES_set_decrypt_key(const unsigned char *userKey, const int bits,
# AES_KEY *key)
&function_begin_B("private_AES_set_decrypt_key");
&call ("_x86_AES_set_encrypt_key");
&cmp ("eax",0);
&je (&label("proceed"));
&ret ();
&set_label("proceed");
&push ("ebp");
&push ("ebx");
&push ("esi");
&push ("edi");
&mov ("esi",&wparam(2));
&mov ("ecx",&DWP(240,"esi")); # pull number of rounds
&lea ("ecx",&DWP(0,"","ecx",4));
&lea ("edi",&DWP(0,"esi","ecx",4)); # pointer to last chunk
&set_label("invert",4); # invert order of chunks
&mov ("eax",&DWP(0,"esi"));
&mov ("ebx",&DWP(4,"esi"));
&mov ("ecx",&DWP(0,"edi"));
&mov ("edx",&DWP(4,"edi"));
&mov (&DWP(0,"edi"),"eax");
&mov (&DWP(4,"edi"),"ebx");
&mov (&DWP(0,"esi"),"ecx");
&mov (&DWP(4,"esi"),"edx");
&mov ("eax",&DWP(8,"esi"));
&mov ("ebx",&DWP(12,"esi"));
&mov ("ecx",&DWP(8,"edi"));
&mov ("edx",&DWP(12,"edi"));
&mov (&DWP(8,"edi"),"eax");
&mov (&DWP(12,"edi"),"ebx");
&mov (&DWP(8,"esi"),"ecx");
&mov (&DWP(12,"esi"),"edx");
&add ("esi",16);
&sub ("edi",16);
&cmp ("esi","edi");
&jne (&label("invert"));
&mov ($key,&wparam(2));
&mov ($acc,&DWP(240,$key)); # pull number of rounds
&lea ($acc,&DWP(-2,$acc,$acc));
&lea ($acc,&DWP(0,$key,$acc,8));
&mov (&wparam(2),$acc);
&mov ($s0,&DWP(16,$key)); # modulo-scheduled load
&set_label("permute",4); # permute the key schedule
&add ($key,16);
&deckey (0,$key,$s0,$s1,$s2,$s3);
&deckey (1,$key,$s1,$s2,$s3,$s0);
&deckey (2,$key,$s2,$s3,$s0,$s1);
&deckey (3,$key,$s3,$s0,$s1,$s2);
&cmp ($key,&wparam(2));
&jb (&label("permute"));
&xor ("eax","eax"); # return success
&function_end("private_AES_set_decrypt_key");
&asciz("AES for x86, CRYPTOGAMS by <appro\@openssl.org>");
&asm_finish();