1/* AES (Rijndael) implementation (FIPS PUB 197) for x86_64 2 * 3 * Copyright (C) 2005 Andreas Steinmetz, <ast@domdv.de> 4 * 5 * License: 6 * This code can be distributed under the terms of the GNU General Public 7 * License (GPL) Version 2 provided that the above header down to and 8 * including this sentence is retained in full. 9 */ 10 11.extern crypto_ft_tab 12.extern crypto_it_tab 13.extern crypto_fl_tab 14.extern crypto_il_tab 15 16.text 17 18#include <asm/asm-offsets.h> 19 20#define R1 %rax 21#define R1E %eax 22#define R1X %ax 23#define R1H %ah 24#define R1L %al 25#define R2 %rbx 26#define R2E %ebx 27#define R2X %bx 28#define R2H %bh 29#define R2L %bl 30#define R3 %rcx 31#define R3E %ecx 32#define R3X %cx 33#define R3H %ch 34#define R3L %cl 35#define R4 %rdx 36#define R4E %edx 37#define R4X %dx 38#define R4H %dh 39#define R4L %dl 40#define R5 %rsi 41#define R5E %esi 42#define R6 %rdi 43#define R6E %edi 44#define R7 %rbp 45#define R7E %ebp 46#define R8 %r8 47#define R9 %r9 48#define R10 %r10 49#define R11 %r11 50 51#define prologue(FUNC,KEY,B128,B192,r1,r2,r3,r4,r5,r6,r7,r8,r9,r10,r11) \ 52 .global FUNC; \ 53 .type FUNC,@function; \ 54 .align 8; \ 55FUNC: movq r1,r2; \ 56 movq r3,r4; \ 57 leaq KEY+48(r8),r9; \ 58 movq r10,r11; \ 59 movl (r7),r5 ## E; \ 60 movl 4(r7),r1 ## E; \ 61 movl 8(r7),r6 ## E; \ 62 movl 12(r7),r7 ## E; \ 63 movl 480(r8),r10 ## E; \ 64 xorl -48(r9),r5 ## E; \ 65 xorl -44(r9),r1 ## E; \ 66 xorl -40(r9),r6 ## E; \ 67 xorl -36(r9),r7 ## E; \ 68 cmpl $24,r10 ## E; \ 69 jb B128; \ 70 leaq 32(r9),r9; \ 71 je B192; \ 72 leaq 32(r9),r9; 73 74#define epilogue(r1,r2,r3,r4,r5,r6,r7,r8,r9) \ 75 movq r1,r2; \ 76 movq r3,r4; \ 77 movl r5 ## E,(r9); \ 78 movl r6 ## E,4(r9); \ 79 movl r7 ## E,8(r9); \ 80 movl r8 ## E,12(r9); \ 81 ret; 82 83#define round(TAB,OFFSET,r1,r2,r3,r4,r5,r6,r7,r8,ra,rb,rc,rd) \ 84 movzbl r2 ## H,r5 ## E; \ 85 movzbl r2 ## L,r6 ## E; \ 86 movl TAB+1024(,r5,4),r5 ## E;\ 87 movw r4 ## X,r2 ## X; \ 88 movl TAB(,r6,4),r6 ## E; \ 89 roll $16,r2 ## E; \ 90 shrl $16,r4 ## E; \ 91 movzbl r4 ## H,r7 ## E; \ 92 movzbl r4 ## L,r4 ## E; \ 93 xorl OFFSET(r8),ra ## E; \ 94 xorl OFFSET+4(r8),rb ## E; \ 95 xorl TAB+3072(,r7,4),r5 ## E;\ 96 xorl TAB+2048(,r4,4),r6 ## E;\ 97 movzbl r1 ## L,r7 ## E; \ 98 movzbl r1 ## H,r4 ## E; \ 99 movl TAB+1024(,r4,4),r4 ## E;\ 100 movw r3 ## X,r1 ## X; \ 101 roll $16,r1 ## E; \ 102 shrl $16,r3 ## E; \ 103 xorl TAB(,r7,4),r5 ## E; \ 104 movzbl r3 ## H,r7 ## E; \ 105 movzbl r3 ## L,r3 ## E; \ 106 xorl TAB+3072(,r7,4),r4 ## E;\ 107 xorl TAB+2048(,r3,4),r5 ## E;\ 108 movzbl r1 ## H,r7 ## E; \ 109 movzbl r1 ## L,r3 ## E; \ 110 shrl $16,r1 ## E; \ 111 xorl TAB+3072(,r7,4),r6 ## E;\ 112 movl TAB+2048(,r3,4),r3 ## E;\ 113 movzbl r1 ## H,r7 ## E; \ 114 movzbl r1 ## L,r1 ## E; \ 115 xorl TAB+1024(,r7,4),r6 ## E;\ 116 xorl TAB(,r1,4),r3 ## E; \ 117 movzbl r2 ## H,r1 ## E; \ 118 movzbl r2 ## L,r7 ## E; \ 119 shrl $16,r2 ## E; \ 120 xorl TAB+3072(,r1,4),r3 ## E;\ 121 xorl TAB+2048(,r7,4),r4 ## E;\ 122 movzbl r2 ## H,r1 ## E; \ 123 movzbl r2 ## L,r2 ## E; \ 124 xorl OFFSET+8(r8),rc ## E; \ 125 xorl OFFSET+12(r8),rd ## E; \ 126 xorl TAB+1024(,r1,4),r3 ## E;\ 127 xorl TAB(,r2,4),r4 ## E; 128 129#define move_regs(r1,r2,r3,r4) \ 130 movl r3 ## E,r1 ## E; \ 131 movl r4 ## E,r2 ## E; 132 133#define entry(FUNC,KEY,B128,B192) \ 134 prologue(FUNC,KEY,B128,B192,R2,R8,R7,R9,R1,R3,R4,R6,R10,R5,R11) 135 136#define return epilogue(R8,R2,R9,R7,R5,R6,R3,R4,R11) 137 138#define encrypt_round(TAB,OFFSET) \ 139 round(TAB,OFFSET,R1,R2,R3,R4,R5,R6,R7,R10,R5,R6,R3,R4) \ 140 move_regs(R1,R2,R5,R6) 141 142#define encrypt_final(TAB,OFFSET) \ 143 round(TAB,OFFSET,R1,R2,R3,R4,R5,R6,R7,R10,R5,R6,R3,R4) 144 145#define decrypt_round(TAB,OFFSET) \ 146 round(TAB,OFFSET,R2,R1,R4,R3,R6,R5,R7,R10,R5,R6,R3,R4) \ 147 move_regs(R1,R2,R5,R6) 148 149#define decrypt_final(TAB,OFFSET) \ 150 round(TAB,OFFSET,R2,R1,R4,R3,R6,R5,R7,R10,R5,R6,R3,R4) 151 152/* void aes_enc_blk(stuct crypto_tfm *tfm, u8 *out, const u8 *in) */ 153 154 entry(aes_enc_blk,0,enc128,enc192) 155 encrypt_round(crypto_ft_tab,-96) 156 encrypt_round(crypto_ft_tab,-80) 157enc192: encrypt_round(crypto_ft_tab,-64) 158 encrypt_round(crypto_ft_tab,-48) 159enc128: encrypt_round(crypto_ft_tab,-32) 160 encrypt_round(crypto_ft_tab,-16) 161 encrypt_round(crypto_ft_tab, 0) 162 encrypt_round(crypto_ft_tab, 16) 163 encrypt_round(crypto_ft_tab, 32) 164 encrypt_round(crypto_ft_tab, 48) 165 encrypt_round(crypto_ft_tab, 64) 166 encrypt_round(crypto_ft_tab, 80) 167 encrypt_round(crypto_ft_tab, 96) 168 encrypt_final(crypto_fl_tab,112) 169 return 170 171/* void aes_dec_blk(struct crypto_tfm *tfm, u8 *out, const u8 *in) */ 172 173 entry(aes_dec_blk,240,dec128,dec192) 174 decrypt_round(crypto_it_tab,-96) 175 decrypt_round(crypto_it_tab,-80) 176dec192: decrypt_round(crypto_it_tab,-64) 177 decrypt_round(crypto_it_tab,-48) 178dec128: decrypt_round(crypto_it_tab,-32) 179 decrypt_round(crypto_it_tab,-16) 180 decrypt_round(crypto_it_tab, 0) 181 decrypt_round(crypto_it_tab, 16) 182 decrypt_round(crypto_it_tab, 32) 183 decrypt_round(crypto_it_tab, 48) 184 decrypt_round(crypto_it_tab, 64) 185 decrypt_round(crypto_it_tab, 80) 186 decrypt_round(crypto_it_tab, 96) 187 decrypt_final(crypto_il_tab,112) 188 return 189