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NetBSD/sys/crypto/blowfish/arch/i386/bf_cbc.S
tls 3d4146e21f Add asm versions of blowfish and des transforms for i386. 
This also involved updating the in-kernel DES functions to correspond
to the versions in our in-tree OpenSSL, because the des_SPtrans table
has changed; the asm code will not work with the old permutation table!

C and i386 asm code for the DES, 3DES, and Blowfish CBC modes is also
included; it is not currently built as the ESP processing in esp_core.c
splits the CBC operation and the cipher transform apart.  Hopefully that
will be fixed as there is a substantial performance improvement to be had
from doing so.  It will remain necessary to use the C version of the
Blowfish CBC function on some i386 machines, however, as the asm version
uses bswapl, which ony 486 and later processors have.  The DES CBC code
doesn't have this problem.

Finally, change esp_core.c to use the ecb3_encrypt function instead of
calling ecb_encrypt three times; this improves performance a bit, in
particular in the asm case.
2001-09-09 11:00:59 +00:00

280 lines
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/* $NetBSD: bf_cbc.S,v 1.1 2001/09/09 11:01:01 tls Exp $ */
/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
* All rights reserved.
*
* This package is an SSL implementation written
* by Eric Young (eay@cryptsoft.com).
* The implementation was written so as to conform with Netscapes SSL.
*
* This library is free for commercial and non-commercial use as long as
* the following conditions are aheared to. The following conditions
* apply to all code found in this distribution, be it the RC4, RSA,
* lhash, DES, etc., code; not just the SSL code. The SSL documentation
* included with this distribution is covered by the same copyright terms
* except that the holder is Tim Hudson (tjh@cryptsoft.com).
*
* Copyright remains Eric Young's, and as such any Copyright notices in
* the code are not to be removed.
* If this package is used in a product, Eric Young should be given attribution
* as the author of the parts of the library used.
* This can be in the form of a textual message at program startup or
* in documentation (online or textual) provided with the package.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* "This product includes cryptographic software written by
* Eric Young (eay@cryptsoft.com)"
* The word 'cryptographic' can be left out if the rouines from the library
* being used are not cryptographic related :-).
* 4. If you include any Windows specific code (or a derivative thereof) from
* the apps directory (application code) you must include an acknowledgement:
* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
*
* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* The licence and distribution terms for any publically available version or
* derivative of this code cannot be changed. i.e. this code cannot simply be
* copied and put under another distribution licence
* [including the GNU Public Licence.]
*/
/*
* Modified from the output of `perl bf-686.pl elf' by
* Thor Lancelot Simon <tls@netbsd.org>
*/
#include <i386/include/asm.h>
ENTRY(BF_cbc_encrypt)
pushl %ebp
pushl %ebx
pushl %esi
pushl %edi
movl 28(%esp), %ebp
# getting iv ptr from parameter 4
movl 36(%esp), %ebx
movl (%ebx), %esi
movl 4(%ebx), %edi
pushl %edi
pushl %esi
pushl %edi
pushl %esi
movl %esp, %ebx
movl 36(%esp), %esi
movl 40(%esp), %edi
# getting encrypt flag from parameter 5
movl 56(%esp), %ecx
# get and push parameter 3
movl 48(%esp), %eax
pushl %eax
pushl %ebx
cmpl $0, %ecx
jz .L000decrypt
andl $4294967288, %ebp
movl 8(%esp), %eax
movl 12(%esp), %ebx
jz .L001encrypt_finish
.L002encrypt_loop:
movl (%esi), %ecx
movl 4(%esi), %edx
xorl %ecx, %eax
xorl %edx, %ebx
.byte 15
.byte 200 # bswapl %eax
.byte 15
.byte 203 # bswapl %ebx
movl %eax, 8(%esp)
movl %ebx, 12(%esp)
call _C_LABEL(BF_encrypt)
movl 8(%esp), %eax
movl 12(%esp), %ebx
.byte 15
.byte 200 # bswapl %eax
.byte 15
.byte 203 # bswapl %ebx
movl %eax, (%edi)
movl %ebx, 4(%edi)
addl $8, %esi
addl $8, %edi
subl $8, %ebp
jnz .L002encrypt_loop
.L001encrypt_finish:
movl 52(%esp), %ebp
andl $7, %ebp
jz .L003finish
xorl %ecx, %ecx
xorl %edx, %edx
movl .L004cbc_enc_jmp_table(,%ebp,4),%ebp
jmp *%ebp
.L005ej7:
movb 6(%esi), %dh
sall $8, %edx
.L006ej6:
movb 5(%esi), %dh
.L007ej5:
movb 4(%esi), %dl
.L008ej4:
movl (%esi), %ecx
jmp .L009ejend
.L010ej3:
movb 2(%esi), %ch
sall $8, %ecx
.L011ej2:
movb 1(%esi), %ch
.L012ej1:
movb (%esi), %cl
.L009ejend:
xorl %ecx, %eax
xorl %edx, %ebx
.byte 15
.byte 200 # bswapl %eax
.byte 15
.byte 203 # bswapl %ebx
movl %eax, 8(%esp)
movl %ebx, 12(%esp)
call _C_LABEL(BF_encrypt)
movl 8(%esp), %eax
movl 12(%esp), %ebx
.byte 15
.byte 200 # bswapl %eax
.byte 15
.byte 203 # bswapl %ebx
movl %eax, (%edi)
movl %ebx, 4(%edi)
jmp .L003finish
.align 16
.L000decrypt:
andl $4294967288, %ebp
movl 16(%esp), %eax
movl 20(%esp), %ebx
jz .L013decrypt_finish
.L014decrypt_loop:
movl (%esi), %eax
movl 4(%esi), %ebx
.byte 15
.byte 200 # bswapl %eax
.byte 15
.byte 203 # bswapl %ebx
movl %eax, 8(%esp)
movl %ebx, 12(%esp)
call _C_LABEL(BF_decrypt)
movl 8(%esp), %eax
movl 12(%esp), %ebx
.byte 15
.byte 200 # bswapl %eax
.byte 15
.byte 203 # bswapl %ebx
movl 16(%esp), %ecx
movl 20(%esp), %edx
xorl %eax, %ecx
xorl %ebx, %edx
movl (%esi), %eax
movl 4(%esi), %ebx
movl %ecx, (%edi)
movl %edx, 4(%edi)
movl %eax, 16(%esp)
movl %ebx, 20(%esp)
addl $8, %esi
addl $8, %edi
subl $8, %ebp
jnz .L014decrypt_loop
.L013decrypt_finish:
movl 52(%esp), %ebp
andl $7, %ebp
jz .L003finish
movl (%esi), %eax
movl 4(%esi), %ebx
.byte 15
.byte 200 # bswapl %eax
.byte 15
.byte 203 # bswapl %ebx
movl %eax, 8(%esp)
movl %ebx, 12(%esp)
call _C_LABEL(BF_decrypt)
movl 8(%esp), %eax
movl 12(%esp), %ebx
.byte 15
.byte 200 # bswapl %eax
.byte 15
.byte 203 # bswapl %ebx
movl 16(%esp), %ecx
movl 20(%esp), %edx
xorl %eax, %ecx
xorl %ebx, %edx
movl (%esi), %eax
movl 4(%esi), %ebx
.L015dj7:
rorl $16, %edx
movb %dl, 6(%edi)
shrl $16, %edx
.L016dj6:
movb %dh, 5(%edi)
.L017dj5:
movb %dl, 4(%edi)
.L018dj4:
movl %ecx, (%edi)
jmp .L019djend
.L020dj3:
rorl $16, %ecx
movb %cl, 2(%edi)
sall $16, %ecx
.L021dj2:
movb %ch, 1(%esi)
.L022dj1:
movb %cl, (%esi)
.L019djend:
jmp .L003finish
.align 16
.L003finish:
movl 60(%esp), %ecx
addl $24, %esp
movl %eax, (%ecx)
movl %ebx, 4(%ecx)
popl %edi
popl %esi
popl %ebx
popl %ebp
ret
.align 16
.L004cbc_enc_jmp_table:
.long 0
.long .L012ej1
.long .L011ej2
.long .L010ej3
.long .L008ej4
.long .L007ej5
.long .L006ej6
.long .L005ej7
.align 16
.L023cbc_dec_jmp_table:
.long 0
.long .L022dj1
.long .L021dj2
.long .L020dj3
.long .L018dj4
.long .L017dj5
.long .L016dj6
.long .L015dj7
.L_BF_cbc_encrypt_end:
.size _C_LABEL(BF_cbc_encrypt),.L_BF_cbc_encrypt_end-_C_LABEL(BF_cbc_encrypt)
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