Commit 0c4de0ed authored by Niels Möller's avatar Niels Möller

Deleted contents. This file is needed just to

override aes.c, which isn't needed for the x86 implementation.

Rev: src/nettle/x86/aes.asm:1.13
parent c8dbae96
C nettle, low-level cryptographics library
C
C Copyright (C) 2001, 2002 Rafael R. Sevilla
C
C The nettle library is free software; you can redistribute it and/or modify
C it under the terms of the GNU Lesser General Public License as published by
C the Free Software Foundation; either version 2.1 of the License, or (at your
C option) any later version.
C
C The nettle library is distributed in the hope that it will be useful, but
C WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
C or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
C License for more details.
C
C You should have received a copy of the GNU Lesser General Public License
C along with the nettle library; see the file COPYING.LIB. If not, write to
C the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
C MA 02111-1307, USA.
C This file does nothing, it exists only to override aes.c, which
C isn't needed.
.file "aes.asm"
C .align 16
C .globl aes_setup
C .type aes_setup,@function
C aes_decrypt:
C C // save all registers that need to be saved
C pushl %ebx C 16(%esp)
C pushl %ebp C 12(%esp)
C pushl %esi C 8(%esp)
C pushl %edi C 4(%esp)
C movl 20(%esp),%esi /* context structure */
C movl 24(%esp),%ecx /* key size */
C movl 28(%esp),%edi /* original key */
C /* This code assumes that the key length given is greater than
C or equal to 4 words (128 bits). BAD THINGS WILL HAPPEN
C OTHERWISEC */
C shrl $2,%ecx /* divide by 4 to get total key length */
C movl %ecx,%edx /* calculate the number of rounds */
C addl $6,%edx /* key length in words + 6 = num. rounds */
C /* copy the initial key into the context structure */
C pushl %ecx
C .key_copy_loop:
C movl (%edi),%eax
C addl $4,%edi
C movl %eax,(%esi)
C addl $4,%esi
C decl %ecx
C jnz .key_copy_loop
C popl %ecx
C incl %edx /* number of rounds + 1 */
C shll $2,%edx /* times aes blk size 4words */
C subl %ecx,%edx /* # of other keys to make */
C movl %ecx,%ebp
C decl %ecx /* turn ecx into a mask */
C movl $1,%ebx /* round constant */
C .keygen_loop:
C movl -4(%esi),%eax /* previous key */
C testl %ecx,%ebp
C jnz .testnk
C /* rotate and substitute */
C roll $8,%eax
C movl %eax,%edi
C andl $0xff,%eax
C Some performance figures, measured on a
C 930 MHz Pentium III with 1854 bogomips.
C
C Optimized C code
C
C aes128 (ECB encrypt): 1.04s, 9.615MB/s
C aes128 (ECB decrypt): 1.04s, 9.615MB/s
C aes128 (CBC encrypt): 1.21s, 8.264MB/s
C aes128 (CBC decrypt): 1.10s, 9.091MB/s
C
C aes192 (ECB encrypt): 1.25s, 8.000MB/s
C aes192 (ECB decrypt): 1.24s, 8.065MB/s
C aes192 (CBC encrypt): 1.40s, 7.143MB/s
C aes192 (CBC decrypt): 1.29s, 7.752MB/s
C
C aes256 (ECB encrypt): 1.43s, 6.993MB/s
C aes256 (ECB decrypt): 1.44s, 6.944MB/s
C aes256 (CBC encrypt): 1.60s, 6.250MB/s
C aes256 (CBC decrypt): 1.49s, 6.711MB/s
C
C Assembler code
C
C aes128 (ECB encrypt): 0.50s, 20.000MB/s
C aes128 (ECB decrypt): 0.48s, 20.833MB/s
C aes128 (CBC encrypt): 0.63s, 15.873MB/s
C aes128 (CBC decrypt): 0.54s, 18.519MB/s
C
C aes192 (ECB encrypt): 0.54s, 18.519MB/s
C aes192 (ECB decrypt): 0.55s, 18.182MB/s
C aes192 (CBC encrypt): 0.69s, 14.493MB/s
C aes192 (CBC decrypt): 0.60s, 16.667MB/s
C
C aes256 (ECB encrypt): 0.62s, 16.129MB/s
C aes256 (ECB decrypt): 0.62s, 16.129MB/s
C aes256 (CBC encrypt): 0.76s, 13.158MB/s
C aes256 (CBC decrypt): 0.67s, 14.925MB/s
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