blob: 3e9f9a9b538b74e7c92e0435bb2c893133324b2b [file] [log] [blame]
Paul Bakker5121ce52009-01-03 21:22:43 +00001/*
2 * VIA PadLock support functions
3 *
Manuel Pégourié-Gonnarda658a402015-01-23 09:45:19 +00004 * Copyright (C) 2006-2014, ARM Limited, All Rights Reserved
Paul Bakkerb96f1542010-07-18 20:36:00 +00005 *
Manuel Pégourié-Gonnardfe446432015-03-06 13:17:10 +00006 * This file is part of mbed TLS (https://tls.mbed.org)
Paul Bakkerb96f1542010-07-18 20:36:00 +00007 *
Paul Bakker5121ce52009-01-03 21:22:43 +00008 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License along
19 * with this program; if not, write to the Free Software Foundation, Inc.,
20 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
21 */
22/*
23 * This implementation is based on the VIA PadLock Programming Guide:
24 *
25 * http://www.via.com.tw/en/downloads/whitepapers/initiatives/padlock/
26 * programming_guide.pdf
27 */
28
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +020029#if !defined(MBEDTLS_CONFIG_FILE)
Manuel Pégourié-Gonnard7f809972015-03-09 17:05:11 +000030#include "mbedtls/config.h"
Manuel Pégourié-Gonnardcef4ad22014-04-29 12:39:06 +020031#else
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +020032#include MBEDTLS_CONFIG_FILE
Manuel Pégourié-Gonnardcef4ad22014-04-29 12:39:06 +020033#endif
Paul Bakker5121ce52009-01-03 21:22:43 +000034
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +020035#if defined(MBEDTLS_PADLOCK_C)
Paul Bakker5121ce52009-01-03 21:22:43 +000036
Manuel Pégourié-Gonnard7f809972015-03-09 17:05:11 +000037#include "mbedtls/padlock.h"
Paul Bakker5121ce52009-01-03 21:22:43 +000038
Manuel Pégourié-Gonnard45ec8da2015-02-10 13:50:47 +000039#include <string.h>
40
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +020041#if defined(MBEDTLS_HAVE_X86)
Paul Bakker5121ce52009-01-03 21:22:43 +000042
Paul Bakker5121ce52009-01-03 21:22:43 +000043/*
44 * PadLock detection routine
45 */
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +020046int mbedtls_padlock_supports( int feature )
Paul Bakker5121ce52009-01-03 21:22:43 +000047{
48 static int flags = -1;
Paul Bakker53e15132013-12-30 20:43:40 +010049 int ebx = 0, edx = 0;
Paul Bakker5121ce52009-01-03 21:22:43 +000050
51 if( flags == -1 )
52 {
Manuel Pégourié-Gonnard87a8ffe2014-06-23 12:40:01 +020053 asm( "movl %%ebx, %0 \n\t"
54 "movl $0xC0000000, %%eax \n\t"
55 "cpuid \n\t"
56 "cmpl $0xC0000001, %%eax \n\t"
57 "movl $0, %%edx \n\t"
58 "jb unsupported \n\t"
59 "movl $0xC0000001, %%eax \n\t"
60 "cpuid \n\t"
61 "unsupported: \n\t"
62 "movl %%edx, %1 \n\t"
63 "movl %2, %%ebx \n\t"
Paul Bakker5121ce52009-01-03 21:22:43 +000064 : "=m" (ebx), "=m" (edx)
65 : "m" (ebx)
66 : "eax", "ecx", "edx" );
67
68 flags = edx;
69 }
70
71 return( flags & feature );
72}
73
74/*
75 * PadLock AES-ECB block en(de)cryption
76 */
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +020077int mbedtls_padlock_xcryptecb( mbedtls_aes_context *ctx,
Paul Bakker5121ce52009-01-03 21:22:43 +000078 int mode,
Paul Bakkerff60ee62010-03-16 21:09:09 +000079 const unsigned char input[16],
Paul Bakker5121ce52009-01-03 21:22:43 +000080 unsigned char output[16] )
81{
Paul Bakker53e15132013-12-30 20:43:40 +010082 int ebx = 0;
Paul Bakker5c2364c2012-10-01 14:41:15 +000083 uint32_t *rk;
84 uint32_t *blk;
85 uint32_t *ctrl;
Paul Bakker5121ce52009-01-03 21:22:43 +000086 unsigned char buf[256];
87
88 rk = ctx->rk;
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +020089 blk = MBEDTLS_PADLOCK_ALIGN16( buf );
Paul Bakker5121ce52009-01-03 21:22:43 +000090 memcpy( blk, input, 16 );
91
92 ctrl = blk + 4;
93 *ctrl = 0x80 | ctx->nr | ( ( ctx->nr + ( mode^1 ) - 10 ) << 9 );
94
Manuel Pégourié-Gonnard87a8ffe2014-06-23 12:40:01 +020095 asm( "pushfl \n\t"
96 "popfl \n\t"
97 "movl %%ebx, %0 \n\t"
98 "movl $1, %%ecx \n\t"
99 "movl %2, %%edx \n\t"
100 "movl %3, %%ebx \n\t"
101 "movl %4, %%esi \n\t"
102 "movl %4, %%edi \n\t"
103 ".byte 0xf3,0x0f,0xa7,0xc8 \n\t"
104 "movl %1, %%ebx \n\t"
Paul Bakker5121ce52009-01-03 21:22:43 +0000105 : "=m" (ebx)
106 : "m" (ebx), "m" (ctrl), "m" (rk), "m" (blk)
Manuel Pégourié-Gonnardcf201202015-04-02 10:46:55 +0100107 : "memory", "ecx", "edx", "esi", "edi" );
Paul Bakker5121ce52009-01-03 21:22:43 +0000108
109 memcpy( output, blk, 16 );
110
111 return( 0 );
112}
113
114/*
115 * PadLock AES-CBC buffer en(de)cryption
116 */
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +0200117int mbedtls_padlock_xcryptcbc( mbedtls_aes_context *ctx,
Paul Bakker5121ce52009-01-03 21:22:43 +0000118 int mode,
Paul Bakker23986e52011-04-24 08:57:21 +0000119 size_t length,
Paul Bakker5121ce52009-01-03 21:22:43 +0000120 unsigned char iv[16],
Paul Bakkerff60ee62010-03-16 21:09:09 +0000121 const unsigned char *input,
Paul Bakker5121ce52009-01-03 21:22:43 +0000122 unsigned char *output )
123{
Paul Bakker53e15132013-12-30 20:43:40 +0100124 int ebx = 0;
Paul Bakker23986e52011-04-24 08:57:21 +0000125 size_t count;
Paul Bakker5c2364c2012-10-01 14:41:15 +0000126 uint32_t *rk;
127 uint32_t *iw;
128 uint32_t *ctrl;
Paul Bakker5121ce52009-01-03 21:22:43 +0000129 unsigned char buf[256];
130
131 if( ( (long) input & 15 ) != 0 ||
132 ( (long) output & 15 ) != 0 )
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +0200133 return( MBEDTLS_ERR_PADLOCK_DATA_MISALIGNED );
Paul Bakker5121ce52009-01-03 21:22:43 +0000134
135 rk = ctx->rk;
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +0200136 iw = MBEDTLS_PADLOCK_ALIGN16( buf );
Paul Bakker5121ce52009-01-03 21:22:43 +0000137 memcpy( iw, iv, 16 );
138
139 ctrl = iw + 4;
Paul Bakker66d5d072014-06-17 16:39:18 +0200140 *ctrl = 0x80 | ctx->nr | ( ( ctx->nr + ( mode ^ 1 ) - 10 ) << 9 );
Paul Bakker5121ce52009-01-03 21:22:43 +0000141
Paul Bakker66d5d072014-06-17 16:39:18 +0200142 count = ( length + 15 ) >> 4;
Paul Bakker5121ce52009-01-03 21:22:43 +0000143
Manuel Pégourié-Gonnard87a8ffe2014-06-23 12:40:01 +0200144 asm( "pushfl \n\t"
145 "popfl \n\t"
146 "movl %%ebx, %0 \n\t"
147 "movl %2, %%ecx \n\t"
148 "movl %3, %%edx \n\t"
149 "movl %4, %%ebx \n\t"
150 "movl %5, %%esi \n\t"
151 "movl %6, %%edi \n\t"
152 "movl %7, %%eax \n\t"
153 ".byte 0xf3,0x0f,0xa7,0xd0 \n\t"
154 "movl %1, %%ebx \n\t"
Paul Bakker5121ce52009-01-03 21:22:43 +0000155 : "=m" (ebx)
156 : "m" (ebx), "m" (count), "m" (ctrl),
157 "m" (rk), "m" (input), "m" (output), "m" (iw)
Manuel Pégourié-Gonnardcf201202015-04-02 10:46:55 +0100158 : "memory", "eax", "ecx", "edx", "esi", "edi" );
Paul Bakker5121ce52009-01-03 21:22:43 +0000159
160 memcpy( iv, iw, 16 );
161
162 return( 0 );
163}
164
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +0200165#endif /* MBEDTLS_HAVE_X86 */
Paul Bakker5121ce52009-01-03 21:22:43 +0000166
Manuel Pégourié-Gonnard2cf5a7c2015-04-08 12:49:31 +0200167#endif /* MBEDTLS_PADLOCK_C */