NetBSD/sys/crypto/blowfish/arch/i386/bf_cbc.S

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/* $NetBSD: bf_cbc.S,v 1.6 2007/12/11 23:13:57 lukem 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.]
*/
/*
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* Modified from the output of `perl bf-686.pl elf' by
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* Thor Lancelot Simon <tls@NetBSD.org>
*/
#include <i386/include/asm.h>
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__KERNEL_RCSID(0, "$NetBSD: bf_cbc.S,v 1.6 2007/12/11 23:13:57 lukem Exp $");
ENTRY(BF_cbc_encrypt)
pushl %ebp
pushl %ebx
pushl %esi
pushl %edi
movl 28(%esp), %ebp
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# 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
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# getting encrypt flag from parameter 5
movl 56(%esp), %ecx
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# 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
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.byte 200 # bswapl %eax
.byte 15
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.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
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.byte 200 # bswapl %eax
.byte 15
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.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
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.byte 200 # bswapl %eax
.byte 15
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.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
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.byte 200 # bswapl %eax
.byte 15
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.byte 203 # bswapl %ebx
movl %eax, (%edi)
movl %ebx, 4(%edi)
jmp .L003finish
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#ifdef __ELF__
.align 16
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#else
.align 4
#endif
.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
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.byte 200 # bswapl %eax
.byte 15
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.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
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.byte 200 # bswapl %eax
.byte 15
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.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
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.byte 200 # bswapl %eax
.byte 15
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.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
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.byte 200 # bswapl %eax
.byte 15
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.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
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#ifdef __ELF__
.align 16
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#else
.align 4
#endif
.L003finish:
movl 60(%esp), %ecx
addl $24, %esp
movl %eax, (%ecx)
movl %ebx, 4(%ecx)
popl %edi
popl %esi
popl %ebx
popl %ebp
ret
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#ifdef __ELF__
.align 16
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#else
.align 4
#endif
.L004cbc_enc_jmp_table:
.long 0
.long .L012ej1
.long .L011ej2
.long .L010ej3
.long .L008ej4
.long .L007ej5
.long .L006ej6
.long .L005ej7
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#ifdef __ELF__
.align 16
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#else
.align 4
#endif
.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)