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Diffstat (limited to 'openssl/crypto/aes/asm/vpaes-x86.pl')
| -rw-r--r-- | openssl/crypto/aes/asm/vpaes-x86.pl | 901 |
1 files changed, 901 insertions, 0 deletions
diff --git a/openssl/crypto/aes/asm/vpaes-x86.pl b/openssl/crypto/aes/asm/vpaes-x86.pl new file mode 100644 index 000000000..84a6f6d33 --- /dev/null +++ b/openssl/crypto/aes/asm/vpaes-x86.pl @@ -0,0 +1,901 @@ +#!/usr/bin/env perl + +###################################################################### +## Constant-time SSSE3 AES core implementation. +## version 0.1 +## +## By Mike Hamburg (Stanford University), 2009 +## Public domain. +## +## For details see http://shiftleft.org/papers/vector_aes/ and +## http://crypto.stanford.edu/vpaes/. + +###################################################################### +# September 2011. +# +# Port vpaes-x86_64.pl as 32-bit "almost" drop-in replacement for +# aes-586.pl. "Almost" refers to the fact that AES_cbc_encrypt +# doesn't handle partial vectors (doesn't have to if called from +# EVP only). "Drop-in" implies that this module doesn't share key +# schedule structure with the original nor does it make assumption +# about its alignment... +# +# Performance summary. aes-586.pl column lists large-block CBC +# encrypt/decrypt/with-hyper-threading-off(*) results in cycles per +# byte processed with 128-bit key, and vpaes-x86.pl column - [also +# large-block CBC] encrypt/decrypt. +# +# aes-586.pl vpaes-x86.pl +# +# Core 2(**) 29.1/42.3/18.3 22.0/25.6(***) +# Nehalem 27.9/40.4/18.1 10.3/12.0 +# Atom 102./119./60.1 64.5/85.3(***) +# +# (*) "Hyper-threading" in the context refers rather to cache shared +# among multiple cores, than to specifically Intel HTT. As vast +# majority of contemporary cores share cache, slower code path +# is common place. In other words "with-hyper-threading-off" +# results are presented mostly for reference purposes. +# +# (**) "Core 2" refers to initial 65nm design, a.k.a. Conroe. +# +# (***) Less impressive improvement on Core 2 and Atom is due to slow +# pshufb, yet it's respectable +32%/65% improvement on Core 2 +# and +58%/40% on Atom (as implied, over "hyper-threading-safe" +# code path). +# +# <appro@openssl.org> + +$0 =~ m/(.*[\/\\])[^\/\\]+$/; $dir=$1; +push(@INC,"${dir}","${dir}../../perlasm"); +require "x86asm.pl"; + +&asm_init($ARGV[0],"vpaes-x86.pl",$x86only = $ARGV[$#ARGV] eq "386"); + +$PREFIX="vpaes"; + +my ($round, $base, $magic, $key, $const, $inp, $out)= + ("eax", "ebx", "ecx", "edx","ebp", "esi","edi"); + +&static_label("_vpaes_consts"); +&static_label("_vpaes_schedule_low_round"); + +&set_label("_vpaes_consts",64); +$k_inv=-0x30; # inv, inva + &data_word(0x0D080180,0x0E05060F,0x0A0B0C02,0x04070309); + &data_word(0x0F0B0780,0x01040A06,0x02050809,0x030D0E0C); + +$k_s0F=-0x10; # s0F + &data_word(0x0F0F0F0F,0x0F0F0F0F,0x0F0F0F0F,0x0F0F0F0F); + +$k_ipt=0x00; # input transform (lo, hi) + &data_word(0x5A2A7000,0xC2B2E898,0x52227808,0xCABAE090); + &data_word(0x317C4D00,0x4C01307D,0xB0FDCC81,0xCD80B1FC); + +$k_sb1=0x20; # sb1u, sb1t + &data_word(0xCB503E00,0xB19BE18F,0x142AF544,0xA5DF7A6E); + &data_word(0xFAE22300,0x3618D415,0x0D2ED9EF,0x3BF7CCC1); +$k_sb2=0x40; # sb2u, sb2t + &data_word(0x0B712400,0xE27A93C6,0xBC982FCD,0x5EB7E955); + &data_word(0x0AE12900,0x69EB8840,0xAB82234A,0xC2A163C8); +$k_sbo=0x60; # sbou, sbot + &data_word(0x6FBDC700,0xD0D26D17,0xC502A878,0x15AABF7A); + &data_word(0x5FBB6A00,0xCFE474A5,0x412B35FA,0x8E1E90D1); + +$k_mc_forward=0x80; # mc_forward + &data_word(0x00030201,0x04070605,0x080B0A09,0x0C0F0E0D); + &data_word(0x04070605,0x080B0A09,0x0C0F0E0D,0x00030201); + &data_word(0x080B0A09,0x0C0F0E0D,0x00030201,0x04070605); + &data_word(0x0C0F0E0D,0x00030201,0x04070605,0x080B0A09); + +$k_mc_backward=0xc0; # mc_backward + &data_word(0x02010003,0x06050407,0x0A09080B,0x0E0D0C0F); + &data_word(0x0E0D0C0F,0x02010003,0x06050407,0x0A09080B); + &data_word(0x0A09080B,0x0E0D0C0F,0x02010003,0x06050407); + &data_word(0x06050407,0x0A09080B,0x0E0D0C0F,0x02010003); + +$k_sr=0x100; # sr + &data_word(0x03020100,0x07060504,0x0B0A0908,0x0F0E0D0C); + &data_word(0x0F0A0500,0x030E0904,0x07020D08,0x0B06010C); + &data_word(0x0B020900,0x0F060D04,0x030A0108,0x070E050C); + &data_word(0x070A0D00,0x0B0E0104,0x0F020508,0x0306090C); + +$k_rcon=0x140; # rcon + &data_word(0xAF9DEEB6,0x1F8391B9,0x4D7C7D81,0x702A9808); + +$k_s63=0x150; # s63: all equal to 0x63 transformed + &data_word(0x5B5B5B5B,0x5B5B5B5B,0x5B5B5B5B,0x5B5B5B5B); + +$k_opt=0x160; # output transform + &data_word(0xD6B66000,0xFF9F4929,0xDEBE6808,0xF7974121); + &data_word(0x50BCEC00,0x01EDBD51,0xB05C0CE0,0xE10D5DB1); + +$k_deskew=0x180; # deskew tables: inverts the sbox's "skew" + &data_word(0x47A4E300,0x07E4A340,0x5DBEF91A,0x1DFEB95A); + &data_word(0x83EA6900,0x5F36B5DC,0xF49D1E77,0x2841C2AB); +## +## Decryption stuff +## Key schedule constants +## +$k_dksd=0x1a0; # decryption key schedule: invskew x*D + &data_word(0xA3E44700,0xFEB91A5D,0x5A1DBEF9,0x0740E3A4); + &data_word(0xB5368300,0x41C277F4,0xAB289D1E,0x5FDC69EA); +$k_dksb=0x1c0; # decryption key schedule: invskew x*B + &data_word(0x8550D500,0x9A4FCA1F,0x1CC94C99,0x03D65386); + &data_word(0xB6FC4A00,0x115BEDA7,0x7E3482C8,0xD993256F); +$k_dkse=0x1e0; # decryption key schedule: invskew x*E + 0x63 + &data_word(0x1FC9D600,0xD5031CCA,0x994F5086,0x53859A4C); + &data_word(0x4FDC7BE8,0xA2319605,0x20B31487,0xCD5EF96A); +$k_dks9=0x200; # decryption key schedule: invskew x*9 + &data_word(0x7ED9A700,0xB6116FC8,0x82255BFC,0x4AED9334); + &data_word(0x27143300,0x45765162,0xE9DAFDCE,0x8BB89FAC); + +## +## Decryption stuff +## Round function constants +## +$k_dipt=0x220; # decryption input transform + &data_word(0x0B545F00,0x0F505B04,0x114E451A,0x154A411E); + &data_word(0x60056500,0x86E383E6,0xF491F194,0x12771772); + +$k_dsb9=0x240; # decryption sbox output *9*u, *9*t + &data_word(0x9A86D600,0x851C0353,0x4F994CC9,0xCAD51F50); + &data_word(0xECD74900,0xC03B1789,0xB2FBA565,0x725E2C9E); +$k_dsbd=0x260; # decryption sbox output *D*u, *D*t + &data_word(0xE6B1A200,0x7D57CCDF,0x882A4439,0xF56E9B13); + &data_word(0x24C6CB00,0x3CE2FAF7,0x15DEEFD3,0x2931180D); +$k_dsbb=0x280; # decryption sbox output *B*u, *B*t + &data_word(0x96B44200,0xD0226492,0xB0F2D404,0x602646F6); + &data_word(0xCD596700,0xC19498A6,0x3255AA6B,0xF3FF0C3E); +$k_dsbe=0x2a0; # decryption sbox output *E*u, *E*t + &data_word(0x26D4D000,0x46F29296,0x64B4F6B0,0x22426004); + &data_word(0xFFAAC100,0x0C55A6CD,0x98593E32,0x9467F36B); +$k_dsbo=0x2c0; # decryption sbox final output + &data_word(0x7EF94000,0x1387EA53,0xD4943E2D,0xC7AA6DB9); + &data_word(0x93441D00,0x12D7560F,0xD8C58E9C,0xCA4B8159); +&asciz ("Vector Permutation AES for x86/SSSE3, Mike Hamburg (Stanford University)"); +&align (64); + +&function_begin_B("_vpaes_preheat"); + &add ($const,&DWP(0,"esp")); + &movdqa ("xmm7",&QWP($k_inv,$const)); + &movdqa ("xmm6",&QWP($k_s0F,$const)); + &ret (); +&function_end_B("_vpaes_preheat"); + +## +## _aes_encrypt_core +## +## AES-encrypt %xmm0. +## +## Inputs: +## %xmm0 = input +## %xmm6-%xmm7 as in _vpaes_preheat +## (%edx) = scheduled keys +## +## Output in %xmm0 +## Clobbers %xmm1-%xmm5, %eax, %ebx, %ecx, %edx +## +## +&function_begin_B("_vpaes_encrypt_core"); + &mov ($magic,16); + &mov ($round,&DWP(240,$key)); + &movdqa ("xmm1","xmm6") + &movdqa ("xmm2",&QWP($k_ipt,$const)); + &pandn ("xmm1","xmm0"); + &movdqu ("xmm5",&QWP(0,$key)); + &psrld ("xmm1",4); + &pand ("xmm0","xmm6"); + &pshufb ("xmm2","xmm0"); + &movdqa ("xmm0",&QWP($k_ipt+16,$const)); + &pshufb ("xmm0","xmm1"); + &pxor ("xmm2","xmm5"); + &pxor ("xmm0","xmm2"); + &add ($key,16); + &lea ($base,&DWP($k_mc_backward,$const)); + &jmp (&label("enc_entry")); + + +&set_label("enc_loop",16); + # middle of middle round + &movdqa ("xmm4",&QWP($k_sb1,$const)); # 4 : sb1u + &pshufb ("xmm4","xmm2"); # 4 = sb1u + &pxor ("xmm4","xmm5"); # 4 = sb1u + k + &movdqa ("xmm0",&QWP($k_sb1+16,$const));# 0 : sb1t + &pshufb ("xmm0","xmm3"); # 0 = sb1t + &pxor ("xmm0","xmm4"); # 0 = A + &movdqa ("xmm5",&QWP($k_sb2,$const)); # 4 : sb2u + &pshufb ("xmm5","xmm2"); # 4 = sb2u + &movdqa ("xmm1",&QWP(-0x40,$base,$magic));# .Lk_mc_forward[] + &movdqa ("xmm2",&QWP($k_sb2+16,$const));# 2 : sb2t + &pshufb ("xmm2","xmm3"); # 2 = sb2t + &pxor ("xmm2","xmm5"); # 2 = 2A + &movdqa ("xmm4",&QWP(0,$base,$magic)); # .Lk_mc_backward[] + &movdqa ("xmm3","xmm0"); # 3 = A + &pshufb ("xmm0","xmm1"); # 0 = B + &add ($key,16); # next key + &pxor ("xmm0","xmm2"); # 0 = 2A+B + &pshufb ("xmm3","xmm4"); # 3 = D + &add ($magic,16); # next mc + &pxor ("xmm3","xmm0"); # 3 = 2A+B+D + &pshufb ("xmm0","xmm1"); # 0 = 2B+C + &and ($magic,0x30); # ... mod 4 + &pxor ("xmm0","xmm3"); # 0 = 2A+3B+C+D + &sub ($round,1); # nr-- + +&set_label("enc_entry"); + # top of round + &movdqa ("xmm1","xmm6"); # 1 : i + &pandn ("xmm1","xmm0"); # 1 = i<<4 + &psrld ("xmm1",4); # 1 = i + &pand ("xmm0","xmm6"); # 0 = k + &movdqa ("xmm5",&QWP($k_inv+16,$const));# 2 : a/k + &pshufb ("xmm5","xmm0"); # 2 = a/k + &pxor ("xmm0","xmm1"); # 0 = j + &movdqa ("xmm3","xmm7"); # 3 : 1/i + &pshufb ("xmm3","xmm1"); # 3 = 1/i + &pxor ("xmm3","xmm5"); # 3 = iak = 1/i + a/k + &movdqa ("xmm4","xmm7"); # 4 : 1/j + &pshufb ("xmm4","xmm0"); # 4 = 1/j + &pxor ("xmm4","xmm5"); # 4 = jak = 1/j + a/k + &movdqa ("xmm2","xmm7"); # 2 : 1/iak + &pshufb ("xmm2","xmm3"); # 2 = 1/iak + &pxor ("xmm2","xmm0"); # 2 = io + &movdqa ("xmm3","xmm7"); # 3 : 1/jak + &movdqu ("xmm5",&QWP(0,$key)); + &pshufb ("xmm3","xmm4"); # 3 = 1/jak + &pxor ("xmm3","xmm1"); # 3 = jo + &jnz (&label("enc_loop")); + + # middle of last round + &movdqa ("xmm4",&QWP($k_sbo,$const)); # 3 : sbou .Lk_sbo + &movdqa ("xmm0",&QWP($k_sbo+16,$const));# 3 : sbot .Lk_sbo+16 + &pshufb ("xmm4","xmm2"); # 4 = sbou + &pxor ("xmm4","xmm5"); # 4 = sb1u + k + &pshufb ("xmm0","xmm3"); # 0 = sb1t + &movdqa ("xmm1",&QWP(0x40,$base,$magic));# .Lk_sr[] + &pxor ("xmm0","xmm4"); # 0 = A + &pshufb ("xmm0","xmm1"); + &ret (); +&function_end_B("_vpaes_encrypt_core"); + +## +## Decryption core +## +## Same API as encryption core. +## +&function_begin_B("_vpaes_decrypt_core"); + &mov ($round,&DWP(240,$key)); + &lea ($base,&DWP($k_dsbd,$const)); + &movdqa ("xmm1","xmm6"); + &movdqa ("xmm2",&QWP($k_dipt-$k_dsbd,$base)); + &pandn ("xmm1","xmm0"); + &mov ($magic,$round); + &psrld ("xmm1",4) + &movdqu ("xmm5",&QWP(0,$key)); + &shl ($magic,4); + &pand ("xmm0","xmm6"); + &pshufb ("xmm2","xmm0"); + &movdqa ("xmm0",&QWP($k_dipt-$k_dsbd+16,$base)); + &xor ($magic,0x30); + &pshufb ("xmm0","xmm1"); + &and ($magic,0x30); + &pxor ("xmm2","xmm5"); + &movdqa ("xmm5",&QWP($k_mc_forward+48,$const)); + &pxor ("xmm0","xmm2"); + &add ($key,16); + &lea ($magic,&DWP($k_sr-$k_dsbd,$base,$magic)); + &jmp (&label("dec_entry")); + +&set_label("dec_loop",16); +## +## Inverse mix columns +## + &movdqa ("xmm4",&QWP(-0x20,$base)); # 4 : sb9u + &pshufb ("xmm4","xmm2"); # 4 = sb9u + &pxor ("xmm4","xmm0"); + &movdqa ("xmm0",&QWP(-0x10,$base)); # 0 : sb9t + &pshufb ("xmm0","xmm3"); # 0 = sb9t + &pxor ("xmm0","xmm4"); # 0 = ch + &add ($key,16); # next round key + + &pshufb ("xmm0","xmm5"); # MC ch + &movdqa ("xmm4",&QWP(0,$base)); # 4 : sbdu + &pshufb ("xmm4","xmm2"); # 4 = sbdu + &pxor ("xmm4","xmm0"); # 4 = ch + &movdqa ("xmm0",&QWP(0x10,$base)); # 0 : sbdt + &pshufb ("xmm0","xmm3"); # 0 = sbdt + &pxor ("xmm0","xmm4"); # 0 = ch + &sub ($round,1); # nr-- + + &pshufb ("xmm0","xmm5"); # MC ch + &movdqa ("xmm4",&QWP(0x20,$base)); # 4 : sbbu + &pshufb ("xmm4","xmm2"); # 4 = sbbu + &pxor ("xmm4","xmm0"); # 4 = ch + &movdqa ("xmm0",&QWP(0x30,$base)); # 0 : sbbt + &pshufb ("xmm0","xmm3"); # 0 = sbbt + &pxor ("xmm0","xmm4"); # 0 = ch + + &pshufb ("xmm0","xmm5"); # MC ch + &movdqa ("xmm4",&QWP(0x40,$base)); # 4 : sbeu + &pshufb ("xmm4","xmm2"); # 4 = sbeu + &pxor ("xmm4","xmm0"); # 4 = ch + &movdqa ("xmm0",&QWP(0x50,$base)); # 0 : sbet + &pshufb ("xmm0","xmm3"); # 0 = sbet + &pxor ("xmm0","xmm4"); # 0 = ch + + &palignr("xmm5","xmm5",12); + +&set_label("dec_entry"); + # top of round + &movdqa ("xmm1","xmm6"); # 1 : i + &pandn ("xmm1","xmm0"); # 1 = i<<4 + &psrld ("xmm1",4); # 1 = i + &pand ("xmm0","xmm6"); # 0 = k + &movdqa ("xmm2",&QWP($k_inv+16,$const));# 2 : a/k + &pshufb ("xmm2","xmm0"); # 2 = a/k + &pxor ("xmm0","xmm1"); # 0 = j + &movdqa ("xmm3","xmm7"); # 3 : 1/i + &pshufb ("xmm3","xmm1"); # 3 = 1/i + &pxor ("xmm3","xmm2"); # 3 = iak = 1/i + a/k + &movdqa ("xmm4","xmm7"); # 4 : 1/j + &pshufb ("xmm4","xmm0"); # 4 = 1/j + &pxor ("xmm4","xmm2"); # 4 = jak = 1/j + a/k + &movdqa ("xmm2","xmm7"); # 2 : 1/iak + &pshufb ("xmm2","xmm3"); # 2 = 1/iak + &pxor ("xmm2","xmm0"); # 2 = io + &movdqa ("xmm3","xmm7"); # 3 : 1/jak + &pshufb ("xmm3","xmm4"); # 3 = 1/jak + &pxor ("xmm3","xmm1"); # 3 = jo + &movdqu ("xmm0",&QWP(0,$key)); + &jnz (&label("dec_loop")); + + # middle of last round + &movdqa ("xmm4",&QWP(0x60,$base)); # 3 : sbou + &pshufb ("xmm4","xmm2"); # 4 = sbou + &pxor ("xmm4","xmm0"); # 4 = sb1u + k + &movdqa ("xmm0",&QWP(0x70,$base)); # 0 : sbot + &movdqa ("xmm2",&QWP(0,$magic)); + &pshufb ("xmm0","xmm3"); # 0 = sb1t + &pxor ("xmm0","xmm4"); # 0 = A + &pshufb ("xmm0","xmm2"); + &ret (); +&function_end_B("_vpaes_decrypt_core"); + +######################################################## +## ## +## AES key schedule ## +## ## +######################################################## +&function_begin_B("_vpaes_schedule_core"); + &add ($const,&DWP(0,"esp")); + &movdqu ("xmm0",&QWP(0,$inp)); # load key (unaligned) + &movdqa ("xmm2",&QWP($k_rcon,$const)); # load rcon + + # input transform + &movdqa ("xmm3","xmm0"); + &lea ($base,&DWP($k_ipt,$const)); + &movdqa (&QWP(4,"esp"),"xmm2"); # xmm8 + &call ("_vpaes_schedule_transform"); + &movdqa ("xmm7","xmm0"); + + &test ($out,$out); + &jnz (&label("schedule_am_decrypting")); + + # encrypting, output zeroth round key after transform + &movdqu (&QWP(0,$key),"xmm0"); + &jmp (&label("schedule_go")); + +&set_label("schedule_am_decrypting"); + # decrypting, output zeroth round key after shiftrows + &movdqa ("xmm1",&QWP($k_sr,$const,$magic)); + &pshufb ("xmm3","xmm1"); + &movdqu (&QWP(0,$key),"xmm3"); + &xor ($magic,0x30); + +&set_label("schedule_go"); + &cmp ($round,192); + &ja (&label("schedule_256")); + &je (&label("schedule_192")); + # 128: fall though + +## +## .schedule_128 +## +## 128-bit specific part of key schedule. +## +## This schedule is really simple, because all its parts +## are accomplished by the subroutines. +## +&set_label("schedule_128"); + &mov ($round,10); + +&set_label("loop_schedule_128"); + &call ("_vpaes_schedule_round"); + &dec ($round); + &jz (&label("schedule_mangle_last")); + &call ("_vpaes_schedule_mangle"); # write output + &jmp (&label("loop_schedule_128")); + +## +## .aes_schedule_192 +## +## 192-bit specific part of key schedule. +## +## The main body of this schedule is the same as the 128-bit +## schedule, but with more smearing. The long, high side is +## stored in %xmm7 as before, and the short, low side is in +## the high bits of %xmm6. +## +## This schedule is somewhat nastier, however, because each +## round produces 192 bits of key material, or 1.5 round keys. +## Therefore, on each cycle we do 2 rounds and produce 3 round +## keys. +## +&set_label("schedule_192",16); + &movdqu ("xmm0",&QWP(8,$inp)); # load key part 2 (very unaligned) + &call ("_vpaes_schedule_transform"); # input transform + &movdqa ("xmm6","xmm0"); # save short part + &pxor ("xmm4","xmm4"); # clear 4 + &movhlps("xmm6","xmm4"); # clobber low side with zeros + &mov ($round,4); + +&set_label("loop_schedule_192"); + &call ("_vpaes_schedule_round"); + &palignr("xmm0","xmm6",8); + &call ("_vpaes_schedule_mangle"); # save key n + &call ("_vpaes_schedule_192_smear"); + &call ("_vpaes_schedule_mangle"); # save key n+1 + &call ("_vpaes_schedule_round"); + &dec ($round); + &jz (&label("schedule_mangle_last")); + &call ("_vpaes_schedule_mangle"); # save key n+2 + &call ("_vpaes_schedule_192_smear"); + &jmp (&label("loop_schedule_192")); + +## +## .aes_schedule_256 +## +## 256-bit specific part of key schedule. +## +## The structure here is very similar to the 128-bit +## schedule, but with an additional "low side" in +## %xmm6. The low side's rounds are the same as the +## high side's, except no rcon and no rotation. +## +&set_label("schedule_256",16); + &movdqu ("xmm0",&QWP(16,$inp)); # load key part 2 (unaligned) + &call ("_vpaes_schedule_transform"); # input transform + &mov ($round,7); + +&set_label("loop_schedule_256"); + &call ("_vpaes_schedule_mangle"); # output low result + &movdqa ("xmm6","xmm0"); # save cur_lo in xmm6 + + # high round + &call ("_vpaes_schedule_round"); + &dec ($round); + &jz (&label("schedule_mangle_last")); + &call ("_vpaes_schedule_mangle"); + + # low round. swap xmm7 and xmm6 + &pshufd ("xmm0","xmm0",0xFF); + &movdqa (&QWP(20,"esp"),"xmm7"); + &movdqa ("xmm7","xmm6"); + &call ("_vpaes_schedule_low_round"); + &movdqa ("xmm7",&QWP(20,"esp")); + + &jmp (&label("loop_schedule_256")); + +## +## .aes_schedule_mangle_last +## +## Mangler for last round of key schedule +## Mangles %xmm0 +## when encrypting, outputs out(%xmm0) ^ 63 +## when decrypting, outputs unskew(%xmm0) +## +## Always called right before return... jumps to cleanup and exits +## +&set_label("schedule_mangle_last",16); + # schedule last round key from xmm0 + &lea ($base,&DWP($k_deskew,$const)); + &test ($out,$out); + &jnz (&label("schedule_mangle_last_dec")); + + # encrypting + &movdqa ("xmm1",&QWP($k_sr,$const,$magic)); + &pshufb ("xmm0","xmm1"); # output permute + &lea ($base,&DWP($k_opt,$const)); # prepare to output transform + &add ($key,32); + +&set_label("schedule_mangle_last_dec"); + &add ($key,-16); + &pxor ("xmm0",&QWP($k_s63,$const)); + &call ("_vpaes_schedule_transform"); # output transform + &movdqu (&QWP(0,$key),"xmm0"); # save last key + + # cleanup + &pxor ("xmm0","xmm0"); + &pxor ("xmm1","xmm1"); + &pxor ("xmm2","xmm2"); + &pxor ("xmm3","xmm3"); + &pxor ("xmm4","xmm4"); + &pxor ("xmm5","xmm5"); + &pxor ("xmm6","xmm6"); + &pxor ("xmm7","xmm7"); + &ret (); +&function_end_B("_vpaes_schedule_core"); + +## +## .aes_schedule_192_smear +## +## Smear the short, low side in the 192-bit key schedule. +## +## Inputs: +## %xmm7: high side, b a x y +## %xmm6: low side, d c 0 0 +## %xmm13: 0 +## +## Outputs: +## %xmm6: b+c+d b+c 0 0 +## %xmm0: b+c+d b+c b a +## +&function_begin_B("_vpaes_schedule_192_smear"); + &pshufd ("xmm0","xmm6",0x80); # d c 0 0 -> c 0 0 0 + &pxor ("xmm6","xmm0"); # -> c+d c 0 0 + &pshufd ("xmm0","xmm7",0xFE); # b a _ _ -> b b b a + &pxor ("xmm6","xmm0"); # -> b+c+d b+c b a + &movdqa ("xmm0","xmm6"); + &pxor ("xmm1","xmm1"); + &movhlps("xmm6","xmm1"); # clobber low side with zeros + &ret (); +&function_end_B("_vpaes_schedule_192_smear"); + +## +## .aes_schedule_round +## +## Runs one main round of the key schedule on %xmm0, %xmm7 +## +## Specifically, runs subbytes on the high dword of %xmm0 +## then rotates it by one byte and xors into the low dword of +## %xmm7. +## +## Adds rcon from low byte of %xmm8, then rotates %xmm8 for +## next rcon. +## +## Smears the dwords of %xmm7 by xoring the low into the +## second low, result into third, result into highest. +## +## Returns results in %xmm7 = %xmm0. +## Clobbers %xmm1-%xmm5. +## +&function_begin_B("_vpaes_schedule_round"); + # extract rcon from xmm8 + &movdqa ("xmm2",&QWP(8,"esp")); # xmm8 + &pxor ("xmm1","xmm1"); + &palignr("xmm1","xmm2",15); + &palignr("xmm2","xmm2",15); + &pxor ("xmm7","xmm1"); + + # rotate + &pshufd ("xmm0","xmm0",0xFF); + &palignr("xmm0","xmm0",1); + + # fall through... + &movdqa (&QWP(8,"esp"),"xmm2"); # xmm8 + + # low round: same as high round, but no rotation and no rcon. +&set_label("_vpaes_schedule_low_round"); + # smear xmm7 + &movdqa ("xmm1","xmm7"); + &pslldq ("xmm7",4); + &pxor ("xmm7","xmm1"); + &movdqa ("xmm1","xmm7"); + &pslldq ("xmm7",8); + &pxor ("xmm7","xmm1"); + &pxor ("xmm7",&QWP($k_s63,$const)); + + # subbyte + &movdqa ("xmm4",&QWP($k_s0F,$const)); + &movdqa ("xmm5",&QWP($k_inv,$const)); # 4 : 1/j + &movdqa ("xmm1","xmm4"); + &pandn ("xmm1","xmm0"); + &psrld ("xmm1",4); # 1 = i + &pand ("xmm0","xmm4"); # 0 = k + &movdqa ("xmm2",&QWP($k_inv+16,$const));# 2 : a/k + &pshufb ("xmm2","xmm0"); # 2 = a/k + &pxor ("xmm0","xmm1"); # 0 = j + &movdqa ("xmm3","xmm5"); # 3 : 1/i + &pshufb ("xmm3","xmm1"); # 3 = 1/i + &pxor ("xmm3","xmm2"); # 3 = iak = 1/i + a/k + &movdqa ("xmm4","xmm5"); # 4 : 1/j + &pshufb ("xmm4","xmm0"); # 4 = 1/j + &pxor ("xmm4","xmm2"); # 4 = jak = 1/j + a/k + &movdqa ("xmm2","xmm5"); # 2 : 1/iak + &pshufb ("xmm2","xmm3"); # 2 = 1/iak + &pxor ("xmm2","xmm0"); # 2 = io + &movdqa ("xmm3","xmm5"); # 3 : 1/jak + &pshufb ("xmm3","xmm4"); # 3 = 1/jak + &pxor ("xmm3","xmm1"); # 3 = jo + &movdqa ("xmm4",&QWP($k_sb1,$const)); # 4 : sbou + &pshufb ("xmm4","xmm2"); # 4 = sbou + &movdqa ("xmm0",&QWP($k_sb1+16,$const));# 0 : sbot + &pshufb ("xmm0","xmm3"); # 0 = sb1t + &pxor ("xmm0","xmm4"); # 0 = sbox output + + # add in smeared stuff + &pxor ("xmm0","xmm7"); + &movdqa ("xmm7","xmm0"); + &ret (); +&function_end_B("_vpaes_schedule_round"); + +## +## .aes_schedule_transform +## +## Linear-transform %xmm0 according to tables at (%ebx) +## +## Output in %xmm0 +## Clobbers %xmm1, %xmm2 +## +&function_begin_B("_vpaes_schedule_transform"); + &movdqa ("xmm2",&QWP($k_s0F,$const)); + &movdqa ("xmm1","xmm2"); + &pandn ("xmm1","xmm0"); + &psrld ("xmm1",4); + &pand ("xmm0","xmm2"); + &movdqa ("xmm2",&QWP(0,$base)); + &pshufb ("xmm2","xmm0"); + &movdqa ("xmm0",&QWP(16,$base)); + &pshufb ("xmm0","xmm1"); + &pxor ("xmm0","xmm2"); + &ret (); +&function_end_B("_vpaes_schedule_transform"); + +## +## .aes_schedule_mangle +## +## Mangle xmm0 from (basis-transformed) standard version +## to our version. +## +## On encrypt, +## xor with 0x63 +## multiply by circulant 0,1,1,1 +## apply shiftrows transform +## +## On decrypt, +## xor with 0x63 +## multiply by "inverse mixcolumns" circulant E,B,D,9 +## deskew +## apply shiftrows transform +## +## +## Writes out to (%edx), and increments or decrements it +## Keeps track of round number mod 4 in %ecx +## Preserves xmm0 +## Clobbers xmm1-xmm5 +## +&function_begin_B("_vpaes_schedule_mangle"); + &movdqa ("xmm4","xmm0"); # save xmm0 for later + &movdqa ("xmm5",&QWP($k_mc_forward,$const)); + &test ($out,$out); + &jnz (&label("schedule_mangle_dec")); + + # encrypting + &add ($key,16); + &pxor ("xmm4",&QWP($k_s63,$const)); + &pshufb ("xmm4","xmm5"); + &movdqa ("xmm3","xmm4"); + &pshufb ("xmm4","xmm5"); + &pxor ("xmm3","xmm4"); + &pshufb ("xmm4","xmm5"); + &pxor ("xmm3","xmm4"); + + &jmp (&label("schedule_mangle_both")); + +&set_label("schedule_mangle_dec",16); + # inverse mix columns + &movdqa ("xmm2",&QWP($k_s0F,$const)); + &lea ($inp,&DWP($k_dksd,$const)); + &movdqa ("xmm1","xmm2"); + &pandn ("xmm1","xmm4"); + &psrld ("xmm1",4); # 1 = hi + &pand ("xmm4","xmm2"); # 4 = lo + + &movdqa ("xmm2",&QWP(0,$inp)); + &pshufb ("xmm2","xmm4"); + &movdqa ("xmm3",&QWP(0x10,$inp)); + &pshufb ("xmm3","xmm1"); + &pxor ("xmm3","xmm2"); + &pshufb ("xmm3","xmm5"); + + &movdqa ("xmm2",&QWP(0x20,$inp)); + &pshufb ("xmm2","xmm4"); + &pxor ("xmm2","xmm3"); + &movdqa ("xmm3",&QWP(0x30,$inp)); + &pshufb ("xmm3","xmm1"); + &pxor ("xmm3","xmm2"); + &pshufb ("xmm3","xmm5"); + + &movdqa ("xmm2",&QWP(0x40,$inp)); + &pshufb ("xmm2","xmm4"); + &pxor ("xmm2","xmm3"); + &movdqa ("xmm3",&QWP(0x50,$inp)); + &pshufb ("xmm3","xmm1"); + &pxor ("xmm3","xmm2"); + &pshufb ("xmm3","xmm5"); + + &movdqa ("xmm2",&QWP(0x60,$inp)); + &pshufb ("xmm2","xmm4"); + &pxor ("xmm2","xmm3"); + &movdqa ("xmm3",&QWP(0x70,$inp)); + &pshufb ("xmm3","xmm1"); + &pxor ("xmm3","xmm2"); + + &add ($key,-16); + +&set_label("schedule_mangle_both"); + &movdqa ("xmm1",&QWP($k_sr,$const,$magic)); + &pshufb ("xmm3","xmm1"); + &add ($magic,-16); + &and ($magic,0x30); + &movdqu (&QWP(0,$key),"xmm3"); + &ret (); +&function_end_B("_vpaes_schedule_mangle"); + +# +# Interface to OpenSSL +# +&function_begin("${PREFIX}_set_encrypt_key"); + &mov ($inp,&wparam(0)); # inp + &lea ($base,&DWP(-56,"esp")); + &mov ($round,&wparam(1)); # bits + &and ($base,-16); + &mov ($key,&wparam(2)); # key + &xchg ($base,"esp"); # alloca + &mov (&DWP(48,"esp"),$base); + + &mov ($base,$round); + &shr ($base,5); + &add ($base,5); + &mov (&DWP(240,$key),$base); # AES_KEY->rounds = nbits/32+5; + &mov ($magic,0x30); + &mov ($out,0); + + &lea ($const,&DWP(&label("_vpaes_consts")."+0x30-".&label("pic_point"))); + &call ("_vpaes_schedule_core"); +&set_label("pic_point"); + + &mov ("esp",&DWP(48,"esp")); + &xor ("eax","eax"); +&function_end("${PREFIX}_set_encrypt_key"); + +&function_begin("${PREFIX}_set_decrypt_key"); + &mov ($inp,&wparam(0)); # inp + &lea ($base,&DWP(-56,"esp")); + &mov ($round,&wparam(1)); # bits + &and ($base,-16); + &mov ($key,&wparam(2)); # key + &xchg ($base,"esp"); # alloca + &mov (&DWP(48,"esp"),$base); + + &mov ($base,$round); + &shr ($base,5); + &add ($base,5); + &mov (&DWP(240,$key),$base); # AES_KEY->rounds = nbits/32+5; + &shl ($base,4); + &lea ($key,&DWP(16,$key,$base)); + + &mov ($out,1); + &mov ($magic,$round); + &shr ($magic,1); + &and ($magic,32); + &xor ($magic,32); # nbist==192?0:32; + + &lea ($const,&DWP(&label("_vpaes_consts")."+0x30-".&label("pic_point"))); + &call ("_vpaes_schedule_core"); +&set_label("pic_point"); + + &mov ("esp",&DWP(48,"esp")); + &xor ("eax","eax"); +&function_end("${PREFIX}_set_decrypt_key"); + +&function_begin("${PREFIX}_encrypt"); + &lea ($const,&DWP(&label("_vpaes_consts")."+0x30-".&label("pic_point"))); + &call ("_vpaes_preheat"); +&set_label("pic_point"); + &mov ($inp,&wparam(0)); # inp + &lea ($base,&DWP(-56,"esp")); + &mov ($out,&wparam(1)); # out + &and ($base,-16); + &mov ($key,&wparam(2)); # key + &xchg ($base,"esp"); # alloca + &mov (&DWP(48,"esp"),$base); + + &movdqu ("xmm0",&QWP(0,$inp)); + &call ("_vpaes_encrypt_core"); + &movdqu (&QWP(0,$out),"xmm0"); + + &mov ("esp",&DWP(48,"esp")); +&function_end("${PREFIX}_encrypt"); + +&function_begin("${PREFIX}_decrypt"); + &lea ($const,&DWP(&label("_vpaes_consts")."+0x30-".&label("pic_point"))); + &call ("_vpaes_preheat"); +&set_label("pic_point"); + &mov ($inp,&wparam(0)); # inp + &lea ($base,&DWP(-56,"esp")); + &mov ($out,&wparam(1)); # out + &and ($base,-16); + &mov ($key,&wparam(2)); # key + &xchg ($base,"esp"); # alloca + &mov (&DWP(48,"esp"),$base); + + &movdqu ("xmm0",&QWP(0,$inp)); + &call ("_vpaes_decrypt_core"); + &movdqu (&QWP(0,$out),"xmm0"); + + &mov ("esp",&DWP(48,"esp")); +&function_end("${PREFIX}_decrypt"); + +&function_begin("${PREFIX}_cbc_encrypt"); + &mov ($inp,&wparam(0)); # inp + &mov ($out,&wparam(1)); # out + &mov ($round,&wparam(2)); # len + &mov ($key,&wparam(3)); # key + &lea ($base,&DWP(-56,"esp")); + &mov ($const,&wparam(4)); # ivp + &and ($base,-16); + &mov ($magic,&wparam(5)); # enc + &xchg ($base,"esp"); # alloca + &movdqu ("xmm1",&QWP(0,$const)); # load IV + &sub ($out,$inp); + &mov (&DWP(48,"esp"),$base); + + &mov (&DWP(0,"esp"),$out); # save out + &sub ($round,16); + &mov (&DWP(4,"esp"),$key) # save key + &mov (&DWP(8,"esp"),$const); # save ivp + &mov ($out,$round); # $out works as $len + + &lea ($const,&DWP(&label("_vpaes_consts")."+0x30-".&label("pic_point"))); + &call ("_vpaes_preheat"); +&set_label("pic_point"); + &cmp ($magic,0); + &je (&label("cbc_dec_loop")); + &jmp (&label("cbc_enc_loop")); + +&set_label("cbc_enc_loop",16); + &movdqu ("xmm0",&QWP(0,$inp)); # load input + &pxor ("xmm0","xmm1"); # inp^=iv + &call ("_vpaes_encrypt_core"); + &mov ($base,&DWP(0,"esp")); # restore out + &mov ($key,&DWP(4,"esp")); # restore key + &movdqa ("xmm1","xmm0"); + &movdqu (&QWP(0,$base,$inp),"xmm0"); # write output + &lea ($inp,&DWP(16,$inp)); + &sub ($out,16); + &jnc (&label("cbc_enc_loop")); + &jmp (&label("cbc_done")); + +&set_label("cbc_dec_loop",16); + &movdqu ("xmm0",&QWP(0,$inp)); # load input + &movdqa (&QWP(16,"esp"),"xmm1"); # save IV + &movdqa (&QWP(32,"esp"),"xmm0"); # save future IV + &call ("_vpaes_decrypt_core"); + &mov ($base,&DWP(0,"esp")); # restore out + &mov ($key,&DWP(4,"esp")); # restore key + &pxor ("xmm0",&QWP(16,"esp")); # out^=iv + &movdqa ("xmm1",&QWP(32,"esp")); # load next IV + &movdqu (&QWP(0,$base,$inp),"xmm0"); # write output + &lea ($inp,&DWP(16,$inp)); + &sub ($out,16); + &jnc (&label("cbc_dec_loop")); + +&set_label("cbc_done"); + &mov ($base,&DWP(8,"esp")); # restore ivp + &mov ("esp",&DWP(48,"esp")); + &movdqu (&QWP(0,$base),"xmm1"); # write IV +&function_end("${PREFIX}_cbc_encrypt"); + +&asm_finish(); |