2 * VIA PadLock support functions
\r
4 * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
\r
5 * SPDX-License-Identifier: Apache-2.0
\r
7 * Licensed under the Apache License, Version 2.0 (the "License"); you may
\r
8 * not use this file except in compliance with the License.
\r
9 * You may obtain a copy of the License at
\r
11 * http://www.apache.org/licenses/LICENSE-2.0
\r
13 * Unless required by applicable law or agreed to in writing, software
\r
14 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
\r
15 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
\r
16 * See the License for the specific language governing permissions and
\r
17 * limitations under the License.
\r
19 * This file is part of mbed TLS (https://tls.mbed.org)
\r
22 * This implementation is based on the VIA PadLock Programming Guide:
\r
24 * http://www.via.com.tw/en/downloads/whitepapers/initiatives/padlock/
\r
25 * programming_guide.pdf
\r
28 #if !defined(MBEDTLS_CONFIG_FILE)
\r
29 #include "mbedtls/config.h"
\r
31 #include MBEDTLS_CONFIG_FILE
\r
34 #if defined(MBEDTLS_PADLOCK_C)
\r
36 #include "mbedtls/padlock.h"
\r
44 #if defined(MBEDTLS_HAVE_X86)
\r
47 * PadLock detection routine
\r
49 int mbedtls_padlock_has_support( int feature )
\r
51 static int flags = -1;
\r
52 int ebx = 0, edx = 0;
\r
56 asm( "movl %%ebx, %0 \n\t"
\r
57 "movl $0xC0000000, %%eax \n\t"
\r
59 "cmpl $0xC0000001, %%eax \n\t"
\r
60 "movl $0, %%edx \n\t"
\r
61 "jb unsupported \n\t"
\r
62 "movl $0xC0000001, %%eax \n\t"
\r
65 "movl %%edx, %1 \n\t"
\r
66 "movl %2, %%ebx \n\t"
\r
67 : "=m" (ebx), "=m" (edx)
\r
69 : "eax", "ecx", "edx" );
\r
74 return( flags & feature );
\r
78 * PadLock AES-ECB block en(de)cryption
\r
80 int mbedtls_padlock_xcryptecb( mbedtls_aes_context *ctx,
\r
82 const unsigned char input[16],
\r
83 unsigned char output[16] )
\r
89 unsigned char buf[256];
\r
92 blk = MBEDTLS_PADLOCK_ALIGN16( buf );
\r
93 memcpy( blk, input, 16 );
\r
96 *ctrl = 0x80 | ctx->nr | ( ( ctx->nr + ( mode^1 ) - 10 ) << 9 );
\r
100 "movl %%ebx, %0 \n\t"
\r
101 "movl $1, %%ecx \n\t"
\r
102 "movl %2, %%edx \n\t"
\r
103 "movl %3, %%ebx \n\t"
\r
104 "movl %4, %%esi \n\t"
\r
105 "movl %4, %%edi \n\t"
\r
106 ".byte 0xf3,0x0f,0xa7,0xc8 \n\t"
\r
107 "movl %1, %%ebx \n\t"
\r
109 : "m" (ebx), "m" (ctrl), "m" (rk), "m" (blk)
\r
110 : "memory", "ecx", "edx", "esi", "edi" );
\r
112 memcpy( output, blk, 16 );
\r
118 * PadLock AES-CBC buffer en(de)cryption
\r
120 int mbedtls_padlock_xcryptcbc( mbedtls_aes_context *ctx,
\r
123 unsigned char iv[16],
\r
124 const unsigned char *input,
\r
125 unsigned char *output )
\r
132 unsigned char buf[256];
\r
134 if( ( (long) input & 15 ) != 0 ||
\r
135 ( (long) output & 15 ) != 0 )
\r
136 return( MBEDTLS_ERR_PADLOCK_DATA_MISALIGNED );
\r
139 iw = MBEDTLS_PADLOCK_ALIGN16( buf );
\r
140 memcpy( iw, iv, 16 );
\r
143 *ctrl = 0x80 | ctx->nr | ( ( ctx->nr + ( mode ^ 1 ) - 10 ) << 9 );
\r
145 count = ( length + 15 ) >> 4;
\r
149 "movl %%ebx, %0 \n\t"
\r
150 "movl %2, %%ecx \n\t"
\r
151 "movl %3, %%edx \n\t"
\r
152 "movl %4, %%ebx \n\t"
\r
153 "movl %5, %%esi \n\t"
\r
154 "movl %6, %%edi \n\t"
\r
155 "movl %7, %%eax \n\t"
\r
156 ".byte 0xf3,0x0f,0xa7,0xd0 \n\t"
\r
157 "movl %1, %%ebx \n\t"
\r
159 : "m" (ebx), "m" (count), "m" (ctrl),
\r
160 "m" (rk), "m" (input), "m" (output), "m" (iw)
\r
161 : "memory", "eax", "ecx", "edx", "esi", "edi" );
\r
163 memcpy( iv, iw, 16 );
\r
168 #endif /* MBEDTLS_HAVE_X86 */
\r
170 #endif /* MBEDTLS_PADLOCK_C */
\r