| #!/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 |
| &sub ($round,16); |
| &jc (&label("cbc_abort")); |
| &lea ($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"),$out); # save out |
| &mov (&DWP(4,"esp"),$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,$base),"xmm1"); # write IV |
| &set_label("cbc_abort"); |
| &function_end("${PREFIX}_cbc_encrypt"); |
| |
| &asm_finish(); |
