904 lines
27 KiB
Perl
904 lines
27 KiB
Perl
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#!/usr/bin/env perl
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######################################################################
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## Constant-time SSSE3 AES core implementation.
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## version 0.1
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##
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## By Mike Hamburg (Stanford University), 2009
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## Public domain.
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##
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## For details see http://shiftleft.org/papers/vector_aes/ and
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## http://crypto.stanford.edu/vpaes/.
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######################################################################
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# September 2011.
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#
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# Port vpaes-x86_64.pl as 32-bit "almost" drop-in replacement for
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# aes-586.pl. "Almost" refers to the fact that AES_cbc_encrypt
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# doesn't handle partial vectors (doesn't have to if called from
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# EVP only). "Drop-in" implies that this module doesn't share key
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# schedule structure with the original nor does it make assumption
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# about its alignment...
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#
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# Performance summary. aes-586.pl column lists large-block CBC
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# encrypt/decrypt/with-hyper-threading-off(*) results in cycles per
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# byte processed with 128-bit key, and vpaes-x86.pl column - [also
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# large-block CBC] encrypt/decrypt.
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#
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# aes-586.pl vpaes-x86.pl
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#
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# Core 2(**) 28.1/41.4/18.3 21.9/25.2(***)
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# Nehalem 27.9/40.4/18.1 10.2/11.9
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# Atom 70.7/92.1/60.1 61.1/75.4(***)
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# Silvermont 45.4/62.9/24.1 49.2/61.1(***)
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#
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# (*) "Hyper-threading" in the context refers rather to cache shared
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# among multiple cores, than to specifically Intel HTT. As vast
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# majority of contemporary cores share cache, slower code path
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# is common place. In other words "with-hyper-threading-off"
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# results are presented mostly for reference purposes.
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#
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# (**) "Core 2" refers to initial 65nm design, a.k.a. Conroe.
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#
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# (***) Less impressive improvement on Core 2 and Atom is due to slow
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# pshufb, yet it's respectable +28%/64% improvement on Core 2
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# and +15% on Atom (as implied, over "hyper-threading-safe"
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# code path).
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#
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# <appro@openssl.org>
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$0 =~ m/(.*[\/\\])[^\/\\]+$/; $dir=$1;
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push(@INC,"${dir}","${dir}../../perlasm");
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require "x86asm.pl";
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&asm_init($ARGV[0],"vpaes-x86.pl",$x86only = $ARGV[$#ARGV] eq "386");
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$PREFIX="vpaes";
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my ($round, $base, $magic, $key, $const, $inp, $out)=
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("eax", "ebx", "ecx", "edx","ebp", "esi","edi");
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&static_label("_vpaes_consts");
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&static_label("_vpaes_schedule_low_round");
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&set_label("_vpaes_consts",64);
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$k_inv=-0x30; # inv, inva
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&data_word(0x0D080180,0x0E05060F,0x0A0B0C02,0x04070309);
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&data_word(0x0F0B0780,0x01040A06,0x02050809,0x030D0E0C);
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$k_s0F=-0x10; # s0F
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&data_word(0x0F0F0F0F,0x0F0F0F0F,0x0F0F0F0F,0x0F0F0F0F);
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$k_ipt=0x00; # input transform (lo, hi)
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&data_word(0x5A2A7000,0xC2B2E898,0x52227808,0xCABAE090);
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&data_word(0x317C4D00,0x4C01307D,0xB0FDCC81,0xCD80B1FC);
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$k_sb1=0x20; # sb1u, sb1t
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&data_word(0xCB503E00,0xB19BE18F,0x142AF544,0xA5DF7A6E);
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&data_word(0xFAE22300,0x3618D415,0x0D2ED9EF,0x3BF7CCC1);
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$k_sb2=0x40; # sb2u, sb2t
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&data_word(0x0B712400,0xE27A93C6,0xBC982FCD,0x5EB7E955);
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&data_word(0x0AE12900,0x69EB8840,0xAB82234A,0xC2A163C8);
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$k_sbo=0x60; # sbou, sbot
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&data_word(0x6FBDC700,0xD0D26D17,0xC502A878,0x15AABF7A);
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&data_word(0x5FBB6A00,0xCFE474A5,0x412B35FA,0x8E1E90D1);
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$k_mc_forward=0x80; # mc_forward
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&data_word(0x00030201,0x04070605,0x080B0A09,0x0C0F0E0D);
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&data_word(0x04070605,0x080B0A09,0x0C0F0E0D,0x00030201);
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&data_word(0x080B0A09,0x0C0F0E0D,0x00030201,0x04070605);
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&data_word(0x0C0F0E0D,0x00030201,0x04070605,0x080B0A09);
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$k_mc_backward=0xc0; # mc_backward
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&data_word(0x02010003,0x06050407,0x0A09080B,0x0E0D0C0F);
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&data_word(0x0E0D0C0F,0x02010003,0x06050407,0x0A09080B);
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&data_word(0x0A09080B,0x0E0D0C0F,0x02010003,0x06050407);
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&data_word(0x06050407,0x0A09080B,0x0E0D0C0F,0x02010003);
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$k_sr=0x100; # sr
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&data_word(0x03020100,0x07060504,0x0B0A0908,0x0F0E0D0C);
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&data_word(0x0F0A0500,0x030E0904,0x07020D08,0x0B06010C);
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&data_word(0x0B020900,0x0F060D04,0x030A0108,0x070E050C);
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&data_word(0x070A0D00,0x0B0E0104,0x0F020508,0x0306090C);
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$k_rcon=0x140; # rcon
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&data_word(0xAF9DEEB6,0x1F8391B9,0x4D7C7D81,0x702A9808);
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$k_s63=0x150; # s63: all equal to 0x63 transformed
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&data_word(0x5B5B5B5B,0x5B5B5B5B,0x5B5B5B5B,0x5B5B5B5B);
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$k_opt=0x160; # output transform
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&data_word(0xD6B66000,0xFF9F4929,0xDEBE6808,0xF7974121);
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&data_word(0x50BCEC00,0x01EDBD51,0xB05C0CE0,0xE10D5DB1);
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$k_deskew=0x180; # deskew tables: inverts the sbox's "skew"
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&data_word(0x47A4E300,0x07E4A340,0x5DBEF91A,0x1DFEB95A);
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&data_word(0x83EA6900,0x5F36B5DC,0xF49D1E77,0x2841C2AB);
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##
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## Decryption stuff
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## Key schedule constants
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##
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$k_dksd=0x1a0; # decryption key schedule: invskew x*D
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&data_word(0xA3E44700,0xFEB91A5D,0x5A1DBEF9,0x0740E3A4);
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&data_word(0xB5368300,0x41C277F4,0xAB289D1E,0x5FDC69EA);
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$k_dksb=0x1c0; # decryption key schedule: invskew x*B
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&data_word(0x8550D500,0x9A4FCA1F,0x1CC94C99,0x03D65386);
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&data_word(0xB6FC4A00,0x115BEDA7,0x7E3482C8,0xD993256F);
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$k_dkse=0x1e0; # decryption key schedule: invskew x*E + 0x63
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&data_word(0x1FC9D600,0xD5031CCA,0x994F5086,0x53859A4C);
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&data_word(0x4FDC7BE8,0xA2319605,0x20B31487,0xCD5EF96A);
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$k_dks9=0x200; # decryption key schedule: invskew x*9
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&data_word(0x7ED9A700,0xB6116FC8,0x82255BFC,0x4AED9334);
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&data_word(0x27143300,0x45765162,0xE9DAFDCE,0x8BB89FAC);
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##
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## Decryption stuff
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## Round function constants
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##
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$k_dipt=0x220; # decryption input transform
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&data_word(0x0B545F00,0x0F505B04,0x114E451A,0x154A411E);
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&data_word(0x60056500,0x86E383E6,0xF491F194,0x12771772);
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$k_dsb9=0x240; # decryption sbox output *9*u, *9*t
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&data_word(0x9A86D600,0x851C0353,0x4F994CC9,0xCAD51F50);
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&data_word(0xECD74900,0xC03B1789,0xB2FBA565,0x725E2C9E);
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$k_dsbd=0x260; # decryption sbox output *D*u, *D*t
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&data_word(0xE6B1A200,0x7D57CCDF,0x882A4439,0xF56E9B13);
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&data_word(0x24C6CB00,0x3CE2FAF7,0x15DEEFD3,0x2931180D);
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$k_dsbb=0x280; # decryption sbox output *B*u, *B*t
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&data_word(0x96B44200,0xD0226492,0xB0F2D404,0x602646F6);
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&data_word(0xCD596700,0xC19498A6,0x3255AA6B,0xF3FF0C3E);
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$k_dsbe=0x2a0; # decryption sbox output *E*u, *E*t
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&data_word(0x26D4D000,0x46F29296,0x64B4F6B0,0x22426004);
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&data_word(0xFFAAC100,0x0C55A6CD,0x98593E32,0x9467F36B);
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$k_dsbo=0x2c0; # decryption sbox final output
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&data_word(0x7EF94000,0x1387EA53,0xD4943E2D,0xC7AA6DB9);
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&data_word(0x93441D00,0x12D7560F,0xD8C58E9C,0xCA4B8159);
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&asciz ("Vector Permutation AES for x86/SSSE3, Mike Hamburg (Stanford University)");
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&align (64);
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&function_begin_B("_vpaes_preheat");
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&add ($const,&DWP(0,"esp"));
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&movdqa ("xmm7",&QWP($k_inv,$const));
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&movdqa ("xmm6",&QWP($k_s0F,$const));
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&ret ();
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&function_end_B("_vpaes_preheat");
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##
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## _aes_encrypt_core
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##
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## AES-encrypt %xmm0.
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##
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## Inputs:
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## %xmm0 = input
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## %xmm6-%xmm7 as in _vpaes_preheat
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## (%edx) = scheduled keys
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##
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## Output in %xmm0
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## Clobbers %xmm1-%xmm5, %eax, %ebx, %ecx, %edx
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##
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##
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&function_begin_B("_vpaes_encrypt_core");
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&mov ($magic,16);
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&mov ($round,&DWP(240,$key));
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&movdqa ("xmm1","xmm6")
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&movdqa ("xmm2",&QWP($k_ipt,$const));
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&pandn ("xmm1","xmm0");
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&pand ("xmm0","xmm6");
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&movdqu ("xmm5",&QWP(0,$key));
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&pshufb ("xmm2","xmm0");
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&movdqa ("xmm0",&QWP($k_ipt+16,$const));
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&pxor ("xmm2","xmm5");
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&psrld ("xmm1",4);
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&add ($key,16);
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&pshufb ("xmm0","xmm1");
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&lea ($base,&DWP($k_mc_backward,$const));
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&pxor ("xmm0","xmm2");
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&jmp (&label("enc_entry"));
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&set_label("enc_loop",16);
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# middle of middle round
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&movdqa ("xmm4",&QWP($k_sb1,$const)); # 4 : sb1u
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&movdqa ("xmm0",&QWP($k_sb1+16,$const));# 0 : sb1t
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&pshufb ("xmm4","xmm2"); # 4 = sb1u
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&pshufb ("xmm0","xmm3"); # 0 = sb1t
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&pxor ("xmm4","xmm5"); # 4 = sb1u + k
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&movdqa ("xmm5",&QWP($k_sb2,$const)); # 4 : sb2u
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&pxor ("xmm0","xmm4"); # 0 = A
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&movdqa ("xmm1",&QWP(-0x40,$base,$magic));# .Lk_mc_forward[]
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&pshufb ("xmm5","xmm2"); # 4 = sb2u
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&movdqa ("xmm2",&QWP($k_sb2+16,$const));# 2 : sb2t
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&movdqa ("xmm4",&QWP(0,$base,$magic)); # .Lk_mc_backward[]
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&pshufb ("xmm2","xmm3"); # 2 = sb2t
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&movdqa ("xmm3","xmm0"); # 3 = A
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&pxor ("xmm2","xmm5"); # 2 = 2A
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&pshufb ("xmm0","xmm1"); # 0 = B
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&add ($key,16); # next key
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&pxor ("xmm0","xmm2"); # 0 = 2A+B
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&pshufb ("xmm3","xmm4"); # 3 = D
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&add ($magic,16); # next mc
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&pxor ("xmm3","xmm0"); # 3 = 2A+B+D
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&pshufb ("xmm0","xmm1"); # 0 = 2B+C
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&and ($magic,0x30); # ... mod 4
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&sub ($round,1); # nr--
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&pxor ("xmm0","xmm3"); # 0 = 2A+3B+C+D
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&set_label("enc_entry");
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# top of round
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&movdqa ("xmm1","xmm6"); # 1 : i
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&movdqa ("xmm5",&QWP($k_inv+16,$const));# 2 : a/k
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&pandn ("xmm1","xmm0"); # 1 = i<<4
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&psrld ("xmm1",4); # 1 = i
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&pand ("xmm0","xmm6"); # 0 = k
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&pshufb ("xmm5","xmm0"); # 2 = a/k
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&movdqa ("xmm3","xmm7"); # 3 : 1/i
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&pxor ("xmm0","xmm1"); # 0 = j
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&pshufb ("xmm3","xmm1"); # 3 = 1/i
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&movdqa ("xmm4","xmm7"); # 4 : 1/j
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&pxor ("xmm3","xmm5"); # 3 = iak = 1/i + a/k
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&pshufb ("xmm4","xmm0"); # 4 = 1/j
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&movdqa ("xmm2","xmm7"); # 2 : 1/iak
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&pxor ("xmm4","xmm5"); # 4 = jak = 1/j + a/k
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&pshufb ("xmm2","xmm3"); # 2 = 1/iak
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&movdqa ("xmm3","xmm7"); # 3 : 1/jak
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&pxor ("xmm2","xmm0"); # 2 = io
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&pshufb ("xmm3","xmm4"); # 3 = 1/jak
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&movdqu ("xmm5",&QWP(0,$key));
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&pxor ("xmm3","xmm1"); # 3 = jo
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&jnz (&label("enc_loop"));
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# middle of last round
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&movdqa ("xmm4",&QWP($k_sbo,$const)); # 3 : sbou .Lk_sbo
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&movdqa ("xmm0",&QWP($k_sbo+16,$const));# 3 : sbot .Lk_sbo+16
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&pshufb ("xmm4","xmm2"); # 4 = sbou
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&pxor ("xmm4","xmm5"); # 4 = sb1u + k
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&pshufb ("xmm0","xmm3"); # 0 = sb1t
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&movdqa ("xmm1",&QWP(0x40,$base,$magic));# .Lk_sr[]
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&pxor ("xmm0","xmm4"); # 0 = A
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&pshufb ("xmm0","xmm1");
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&ret ();
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&function_end_B("_vpaes_encrypt_core");
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##
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## Decryption core
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##
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## Same API as encryption core.
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##
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&function_begin_B("_vpaes_decrypt_core");
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&lea ($base,&DWP($k_dsbd,$const));
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|
|
&mov ($round,&DWP(240,$key));
|
||
|
|
&movdqa ("xmm1","xmm6");
|
||
|
|
&movdqa ("xmm2",&QWP($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
|
||
|
|
&movdqa ("xmm1",&QWP(-0x10,$base)); # 0 : sb9t
|
||
|
|
&pshufb ("xmm4","xmm2"); # 4 = sb9u
|
||
|
|
&pshufb ("xmm1","xmm3"); # 0 = sb9t
|
||
|
|
&pxor ("xmm0","xmm4");
|
||
|
|
&movdqa ("xmm4",&QWP(0,$base)); # 4 : sbdu
|
||
|
|
&pxor ("xmm0","xmm1"); # 0 = ch
|
||
|
|
&movdqa ("xmm1",&QWP(0x10,$base)); # 0 : sbdt
|
||
|
|
|
||
|
|
&pshufb ("xmm4","xmm2"); # 4 = sbdu
|
||
|
|
&pshufb ("xmm0","xmm5"); # MC ch
|
||
|
|
&pshufb ("xmm1","xmm3"); # 0 = sbdt
|
||
|
|
&pxor ("xmm0","xmm4"); # 4 = ch
|
||
|
|
&movdqa ("xmm4",&QWP(0x20,$base)); # 4 : sbbu
|
||
|
|
&pxor ("xmm0","xmm1"); # 0 = ch
|
||
|
|
&movdqa ("xmm1",&QWP(0x30,$base)); # 0 : sbbt
|
||
|
|
|
||
|
|
&pshufb ("xmm4","xmm2"); # 4 = sbbu
|
||
|
|
&pshufb ("xmm0","xmm5"); # MC ch
|
||
|
|
&pshufb ("xmm1","xmm3"); # 0 = sbbt
|
||
|
|
&pxor ("xmm0","xmm4"); # 4 = ch
|
||
|
|
&movdqa ("xmm4",&QWP(0x40,$base)); # 4 : sbeu
|
||
|
|
&pxor ("xmm0","xmm1"); # 0 = ch
|
||
|
|
&movdqa ("xmm1",&QWP(0x50,$base)); # 0 : sbet
|
||
|
|
|
||
|
|
&pshufb ("xmm4","xmm2"); # 4 = sbeu
|
||
|
|
&pshufb ("xmm0","xmm5"); # MC ch
|
||
|
|
&pshufb ("xmm1","xmm3"); # 0 = sbet
|
||
|
|
&pxor ("xmm0","xmm4"); # 4 = ch
|
||
|
|
&add ($key,16); # next round key
|
||
|
|
&palignr("xmm5","xmm5",12);
|
||
|
|
&pxor ("xmm0","xmm1"); # 0 = ch
|
||
|
|
&sub ($round,1); # nr--
|
||
|
|
|
||
|
|
&set_label("dec_entry");
|
||
|
|
# top of round
|
||
|
|
&movdqa ("xmm1","xmm6"); # 1 : i
|
||
|
|
&movdqa ("xmm2",&QWP($k_inv+16,$const));# 2 : a/k
|
||
|
|
&pandn ("xmm1","xmm0"); # 1 = i<<4
|
||
|
|
&pand ("xmm0","xmm6"); # 0 = k
|
||
|
|
&psrld ("xmm1",4); # 1 = i
|
||
|
|
&pshufb ("xmm2","xmm0"); # 2 = a/k
|
||
|
|
&movdqa ("xmm3","xmm7"); # 3 : 1/i
|
||
|
|
&pxor ("xmm0","xmm1"); # 0 = j
|
||
|
|
&pshufb ("xmm3","xmm1"); # 3 = 1/i
|
||
|
|
&movdqa ("xmm4","xmm7"); # 4 : 1/j
|
||
|
|
&pxor ("xmm3","xmm2"); # 3 = iak = 1/i + a/k
|
||
|
|
&pshufb ("xmm4","xmm0"); # 4 = 1/j
|
||
|
|
&pxor ("xmm4","xmm2"); # 4 = jak = 1/j + a/k
|
||
|
|
&movdqa ("xmm2","xmm7"); # 2 : 1/iak
|
||
|
|
&pshufb ("xmm2","xmm3"); # 2 = 1/iak
|
||
|
|
&movdqa ("xmm3","xmm7"); # 3 : 1/jak
|
||
|
|
&pxor ("xmm2","xmm0"); # 2 = io
|
||
|
|
&pshufb ("xmm3","xmm4"); # 3 = 1/jak
|
||
|
|
&movdqu ("xmm0",&QWP(0,$key));
|
||
|
|
&pxor ("xmm3","xmm1"); # 3 = jo
|
||
|
|
&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 ("xmm1","xmm6",0x80); # d c 0 0 -> c 0 0 0
|
||
|
|
&pshufd ("xmm0","xmm7",0xFE); # b a _ _ -> b b b a
|
||
|
|
&pxor ("xmm6","xmm1"); # -> c+d c 0 0
|
||
|
|
&pxor ("xmm1","xmm1");
|
||
|
|
&pxor ("xmm6","xmm0"); # -> b+c+d b+c b a
|
||
|
|
&movdqa ("xmm0","xmm6");
|
||
|
|
&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();
|