/* $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.]
 */

/*
 * Modified from the output of `perl bf-686.pl elf' by
 * Thor Lancelot Simon <tls@NetBSD.org>
 */

#include <i386/include/asm.h>
__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
        # 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
#ifdef __ELF__
.align 16
#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
.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
#ifdef __ELF__
.align 16
#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
#ifdef __ELF__
.align 16
#else
.align 4
#endif
.L004cbc_enc_jmp_table:
        .long 0
        .long .L012ej1
        .long .L011ej2
        .long .L010ej3
        .long .L008ej4
        .long .L007ej5
        .long .L006ej6
        .long .L005ej7
#ifdef __ELF__
.align 16
#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)