Nitin Shukla / LED_Demo

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Dependencies:   MAX44000 nexpaq_mdk

Fork of LED_Demo by Maxim nexpaq

mbd_os/features/mbedtls/src/timing.c@1:55a6170b404f, 2016-09-17 (annotated)

Committer:
nexpaq
Date:
Sat Sep 17 16:32:05 2016 +0000
Revision:
1:55a6170b404f
checking in for sharing

Who changed what in which revision?

UserRevisionLine numberNew contents of line
nexpaq 1:55a6170b404f 1 /*
nexpaq 1:55a6170b404f 2 * Portable interface to the CPU cycle counter
nexpaq 1:55a6170b404f 3 *
nexpaq 1:55a6170b404f 4 * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
nexpaq 1:55a6170b404f 5 * SPDX-License-Identifier: Apache-2.0
nexpaq 1:55a6170b404f 6 *
nexpaq 1:55a6170b404f 7 * Licensed under the Apache License, Version 2.0 (the "License"); you may
nexpaq 1:55a6170b404f 8 * not use this file except in compliance with the License.
nexpaq 1:55a6170b404f 9 * You may obtain a copy of the License at
nexpaq 1:55a6170b404f 10 *
nexpaq 1:55a6170b404f 11 * http://www.apache.org/licenses/LICENSE-2.0
nexpaq 1:55a6170b404f 12 *
nexpaq 1:55a6170b404f 13 * Unless required by applicable law or agreed to in writing, software
nexpaq 1:55a6170b404f 14 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
nexpaq 1:55a6170b404f 15 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
nexpaq 1:55a6170b404f 16 * See the License for the specific language governing permissions and
nexpaq 1:55a6170b404f 17 * limitations under the License.
nexpaq 1:55a6170b404f 18 *
nexpaq 1:55a6170b404f 19 * This file is part of mbed TLS (https://tls.mbed.org)
nexpaq 1:55a6170b404f 20 */
nexpaq 1:55a6170b404f 21
nexpaq 1:55a6170b404f 22 #if !defined(MBEDTLS_CONFIG_FILE)
nexpaq 1:55a6170b404f 23 #include "mbedtls/config.h"
nexpaq 1:55a6170b404f 24 #else
nexpaq 1:55a6170b404f 25 #include MBEDTLS_CONFIG_FILE
nexpaq 1:55a6170b404f 26 #endif
nexpaq 1:55a6170b404f 27
nexpaq 1:55a6170b404f 28 #if defined(MBEDTLS_SELF_TEST) && defined(MBEDTLS_PLATFORM_C)
nexpaq 1:55a6170b404f 29 #include "mbedtls/platform.h"
nexpaq 1:55a6170b404f 30 #else
nexpaq 1:55a6170b404f 31 #include <stdio.h>
nexpaq 1:55a6170b404f 32 #define mbedtls_printf printf
nexpaq 1:55a6170b404f 33 #endif
nexpaq 1:55a6170b404f 34
nexpaq 1:55a6170b404f 35 #if defined(MBEDTLS_TIMING_C)
nexpaq 1:55a6170b404f 36
nexpaq 1:55a6170b404f 37 #include "mbedtls/timing.h"
nexpaq 1:55a6170b404f 38
nexpaq 1:55a6170b404f 39 #if !defined(MBEDTLS_TIMING_ALT)
nexpaq 1:55a6170b404f 40
nexpaq 1:55a6170b404f 41 #if !defined(unix) && !defined(__unix__) && !defined(__unix) && \
nexpaq 1:55a6170b404f 42 !defined(__APPLE__) && !defined(_WIN32)
nexpaq 1:55a6170b404f 43 #error "This module only works on Unix and Windows, see MBEDTLS_TIMING_C in config.h"
nexpaq 1:55a6170b404f 44 #endif
nexpaq 1:55a6170b404f 45
nexpaq 1:55a6170b404f 46 #ifndef asm
nexpaq 1:55a6170b404f 47 #define asm __asm
nexpaq 1:55a6170b404f 48 #endif
nexpaq 1:55a6170b404f 49
nexpaq 1:55a6170b404f 50 #if defined(_WIN32) && !defined(EFIX64) && !defined(EFI32)
nexpaq 1:55a6170b404f 51
nexpaq 1:55a6170b404f 52 #include <windows.h>
nexpaq 1:55a6170b404f 53 #include <winbase.h>
nexpaq 1:55a6170b404f 54
nexpaq 1:55a6170b404f 55 struct _hr_time
nexpaq 1:55a6170b404f 56 {
nexpaq 1:55a6170b404f 57 LARGE_INTEGER start;
nexpaq 1:55a6170b404f 58 };
nexpaq 1:55a6170b404f 59
nexpaq 1:55a6170b404f 60 #else
nexpaq 1:55a6170b404f 61
nexpaq 1:55a6170b404f 62 #include <unistd.h>
nexpaq 1:55a6170b404f 63 #include <sys/types.h>
nexpaq 1:55a6170b404f 64 #include <sys/time.h>
nexpaq 1:55a6170b404f 65 #include <signal.h>
nexpaq 1:55a6170b404f 66 #include <time.h>
nexpaq 1:55a6170b404f 67
nexpaq 1:55a6170b404f 68 struct _hr_time
nexpaq 1:55a6170b404f 69 {
nexpaq 1:55a6170b404f 70 struct timeval start;
nexpaq 1:55a6170b404f 71 };
nexpaq 1:55a6170b404f 72
nexpaq 1:55a6170b404f 73 #endif /* _WIN32 && !EFIX64 && !EFI32 */
nexpaq 1:55a6170b404f 74
nexpaq 1:55a6170b404f 75 #if !defined(HAVE_HARDCLOCK) && defined(MBEDTLS_HAVE_ASM) && \
nexpaq 1:55a6170b404f 76 ( defined(_MSC_VER) && defined(_M_IX86) ) || defined(__WATCOMC__)
nexpaq 1:55a6170b404f 77
nexpaq 1:55a6170b404f 78 #define HAVE_HARDCLOCK
nexpaq 1:55a6170b404f 79
nexpaq 1:55a6170b404f 80 unsigned long mbedtls_timing_hardclock( void )
nexpaq 1:55a6170b404f 81 {
nexpaq 1:55a6170b404f 82 unsigned long tsc;
nexpaq 1:55a6170b404f 83 __asm rdtsc
nexpaq 1:55a6170b404f 84 __asm mov [tsc], eax
nexpaq 1:55a6170b404f 85 return( tsc );
nexpaq 1:55a6170b404f 86 }
nexpaq 1:55a6170b404f 87 #endif /* !HAVE_HARDCLOCK && MBEDTLS_HAVE_ASM &&
nexpaq 1:55a6170b404f 88 ( _MSC_VER && _M_IX86 ) || __WATCOMC__ */
nexpaq 1:55a6170b404f 89
nexpaq 1:55a6170b404f 90 /* some versions of mingw-64 have 32-bit longs even on x84_64 */
nexpaq 1:55a6170b404f 91 #if !defined(HAVE_HARDCLOCK) && defined(MBEDTLS_HAVE_ASM) && \
nexpaq 1:55a6170b404f 92 defined(__GNUC__) && ( defined(__i386__) || ( \
nexpaq 1:55a6170b404f 93 ( defined(__amd64__) || defined( __x86_64__) ) && __SIZEOF_LONG__ == 4 ) )
nexpaq 1:55a6170b404f 94
nexpaq 1:55a6170b404f 95 #define HAVE_HARDCLOCK
nexpaq 1:55a6170b404f 96
nexpaq 1:55a6170b404f 97 unsigned long mbedtls_timing_hardclock( void )
nexpaq 1:55a6170b404f 98 {
nexpaq 1:55a6170b404f 99 unsigned long lo, hi;
nexpaq 1:55a6170b404f 100 asm volatile( "rdtsc" : "=a" (lo), "=d" (hi) );
nexpaq 1:55a6170b404f 101 return( lo );
nexpaq 1:55a6170b404f 102 }
nexpaq 1:55a6170b404f 103 #endif /* !HAVE_HARDCLOCK && MBEDTLS_HAVE_ASM &&
nexpaq 1:55a6170b404f 104 __GNUC__ && __i386__ */
nexpaq 1:55a6170b404f 105
nexpaq 1:55a6170b404f 106 #if !defined(HAVE_HARDCLOCK) && defined(MBEDTLS_HAVE_ASM) && \
nexpaq 1:55a6170b404f 107 defined(__GNUC__) && ( defined(__amd64__) || defined(__x86_64__) )
nexpaq 1:55a6170b404f 108
nexpaq 1:55a6170b404f 109 #define HAVE_HARDCLOCK
nexpaq 1:55a6170b404f 110
nexpaq 1:55a6170b404f 111 unsigned long mbedtls_timing_hardclock( void )
nexpaq 1:55a6170b404f 112 {
nexpaq 1:55a6170b404f 113 unsigned long lo, hi;
nexpaq 1:55a6170b404f 114 asm volatile( "rdtsc" : "=a" (lo), "=d" (hi) );
nexpaq 1:55a6170b404f 115 return( lo | ( hi << 32 ) );
nexpaq 1:55a6170b404f 116 }
nexpaq 1:55a6170b404f 117 #endif /* !HAVE_HARDCLOCK && MBEDTLS_HAVE_ASM &&
nexpaq 1:55a6170b404f 118 __GNUC__ && ( __amd64__ || __x86_64__ ) */
nexpaq 1:55a6170b404f 119
nexpaq 1:55a6170b404f 120 #if !defined(HAVE_HARDCLOCK) && defined(MBEDTLS_HAVE_ASM) && \
nexpaq 1:55a6170b404f 121 defined(__GNUC__) && ( defined(__powerpc__) || defined(__ppc__) )
nexpaq 1:55a6170b404f 122
nexpaq 1:55a6170b404f 123 #define HAVE_HARDCLOCK
nexpaq 1:55a6170b404f 124
nexpaq 1:55a6170b404f 125 unsigned long mbedtls_timing_hardclock( void )
nexpaq 1:55a6170b404f 126 {
nexpaq 1:55a6170b404f 127 unsigned long tbl, tbu0, tbu1;
nexpaq 1:55a6170b404f 128
nexpaq 1:55a6170b404f 129 do
nexpaq 1:55a6170b404f 130 {
nexpaq 1:55a6170b404f 131 asm volatile( "mftbu %0" : "=r" (tbu0) );
nexpaq 1:55a6170b404f 132 asm volatile( "mftb %0" : "=r" (tbl ) );
nexpaq 1:55a6170b404f 133 asm volatile( "mftbu %0" : "=r" (tbu1) );
nexpaq 1:55a6170b404f 134 }
nexpaq 1:55a6170b404f 135 while( tbu0 != tbu1 );
nexpaq 1:55a6170b404f 136
nexpaq 1:55a6170b404f 137 return( tbl );
nexpaq 1:55a6170b404f 138 }
nexpaq 1:55a6170b404f 139 #endif /* !HAVE_HARDCLOCK && MBEDTLS_HAVE_ASM &&
nexpaq 1:55a6170b404f 140 __GNUC__ && ( __powerpc__ || __ppc__ ) */
nexpaq 1:55a6170b404f 141
nexpaq 1:55a6170b404f 142 #if !defined(HAVE_HARDCLOCK) && defined(MBEDTLS_HAVE_ASM) && \
nexpaq 1:55a6170b404f 143 defined(__GNUC__) && defined(__sparc64__)
nexpaq 1:55a6170b404f 144
nexpaq 1:55a6170b404f 145 #if defined(__OpenBSD__)
nexpaq 1:55a6170b404f 146 #warning OpenBSD does not allow access to tick register using software version instead
nexpaq 1:55a6170b404f 147 #else
nexpaq 1:55a6170b404f 148 #define HAVE_HARDCLOCK
nexpaq 1:55a6170b404f 149
nexpaq 1:55a6170b404f 150 unsigned long mbedtls_timing_hardclock( void )
nexpaq 1:55a6170b404f 151 {
nexpaq 1:55a6170b404f 152 unsigned long tick;
nexpaq 1:55a6170b404f 153 asm volatile( "rdpr %%tick, %0;" : "=&r" (tick) );
nexpaq 1:55a6170b404f 154 return( tick );
nexpaq 1:55a6170b404f 155 }
nexpaq 1:55a6170b404f 156 #endif /* __OpenBSD__ */
nexpaq 1:55a6170b404f 157 #endif /* !HAVE_HARDCLOCK && MBEDTLS_HAVE_ASM &&
nexpaq 1:55a6170b404f 158 __GNUC__ && __sparc64__ */
nexpaq 1:55a6170b404f 159
nexpaq 1:55a6170b404f 160 #if !defined(HAVE_HARDCLOCK) && defined(MBEDTLS_HAVE_ASM) && \
nexpaq 1:55a6170b404f 161 defined(__GNUC__) && defined(__sparc__) && !defined(__sparc64__)
nexpaq 1:55a6170b404f 162
nexpaq 1:55a6170b404f 163 #define HAVE_HARDCLOCK
nexpaq 1:55a6170b404f 164
nexpaq 1:55a6170b404f 165 unsigned long mbedtls_timing_hardclock( void )
nexpaq 1:55a6170b404f 166 {
nexpaq 1:55a6170b404f 167 unsigned long tick;
nexpaq 1:55a6170b404f 168 asm volatile( ".byte 0x83, 0x41, 0x00, 0x00" );
nexpaq 1:55a6170b404f 169 asm volatile( "mov %%g1, %0" : "=r" (tick) );
nexpaq 1:55a6170b404f 170 return( tick );
nexpaq 1:55a6170b404f 171 }
nexpaq 1:55a6170b404f 172 #endif /* !HAVE_HARDCLOCK && MBEDTLS_HAVE_ASM &&
nexpaq 1:55a6170b404f 173 __GNUC__ && __sparc__ && !__sparc64__ */
nexpaq 1:55a6170b404f 174
nexpaq 1:55a6170b404f 175 #if !defined(HAVE_HARDCLOCK) && defined(MBEDTLS_HAVE_ASM) && \
nexpaq 1:55a6170b404f 176 defined(__GNUC__) && defined(__alpha__)
nexpaq 1:55a6170b404f 177
nexpaq 1:55a6170b404f 178 #define HAVE_HARDCLOCK
nexpaq 1:55a6170b404f 179
nexpaq 1:55a6170b404f 180 unsigned long mbedtls_timing_hardclock( void )
nexpaq 1:55a6170b404f 181 {
nexpaq 1:55a6170b404f 182 unsigned long cc;
nexpaq 1:55a6170b404f 183 asm volatile( "rpcc %0" : "=r" (cc) );
nexpaq 1:55a6170b404f 184 return( cc & 0xFFFFFFFF );
nexpaq 1:55a6170b404f 185 }
nexpaq 1:55a6170b404f 186 #endif /* !HAVE_HARDCLOCK && MBEDTLS_HAVE_ASM &&
nexpaq 1:55a6170b404f 187 __GNUC__ && __alpha__ */
nexpaq 1:55a6170b404f 188
nexpaq 1:55a6170b404f 189 #if !defined(HAVE_HARDCLOCK) && defined(MBEDTLS_HAVE_ASM) && \
nexpaq 1:55a6170b404f 190 defined(__GNUC__) && defined(__ia64__)
nexpaq 1:55a6170b404f 191
nexpaq 1:55a6170b404f 192 #define HAVE_HARDCLOCK
nexpaq 1:55a6170b404f 193
nexpaq 1:55a6170b404f 194 unsigned long mbedtls_timing_hardclock( void )
nexpaq 1:55a6170b404f 195 {
nexpaq 1:55a6170b404f 196 unsigned long itc;
nexpaq 1:55a6170b404f 197 asm volatile( "mov %0 = ar.itc" : "=r" (itc) );
nexpaq 1:55a6170b404f 198 return( itc );
nexpaq 1:55a6170b404f 199 }
nexpaq 1:55a6170b404f 200 #endif /* !HAVE_HARDCLOCK && MBEDTLS_HAVE_ASM &&
nexpaq 1:55a6170b404f 201 __GNUC__ && __ia64__ */
nexpaq 1:55a6170b404f 202
nexpaq 1:55a6170b404f 203 #if !defined(HAVE_HARDCLOCK) && defined(_MSC_VER) && \
nexpaq 1:55a6170b404f 204 !defined(EFIX64) && !defined(EFI32)
nexpaq 1:55a6170b404f 205
nexpaq 1:55a6170b404f 206 #define HAVE_HARDCLOCK
nexpaq 1:55a6170b404f 207
nexpaq 1:55a6170b404f 208 unsigned long mbedtls_timing_hardclock( void )
nexpaq 1:55a6170b404f 209 {
nexpaq 1:55a6170b404f 210 LARGE_INTEGER offset;
nexpaq 1:55a6170b404f 211
nexpaq 1:55a6170b404f 212 QueryPerformanceCounter( &offset );
nexpaq 1:55a6170b404f 213
nexpaq 1:55a6170b404f 214 return( (unsigned long)( offset.QuadPart ) );
nexpaq 1:55a6170b404f 215 }
nexpaq 1:55a6170b404f 216 #endif /* !HAVE_HARDCLOCK && _MSC_VER && !EFIX64 && !EFI32 */
nexpaq 1:55a6170b404f 217
nexpaq 1:55a6170b404f 218 #if !defined(HAVE_HARDCLOCK)
nexpaq 1:55a6170b404f 219
nexpaq 1:55a6170b404f 220 #define HAVE_HARDCLOCK
nexpaq 1:55a6170b404f 221
nexpaq 1:55a6170b404f 222 static int hardclock_init = 0;
nexpaq 1:55a6170b404f 223 static struct timeval tv_init;
nexpaq 1:55a6170b404f 224
nexpaq 1:55a6170b404f 225 unsigned long mbedtls_timing_hardclock( void )
nexpaq 1:55a6170b404f 226 {
nexpaq 1:55a6170b404f 227 struct timeval tv_cur;
nexpaq 1:55a6170b404f 228
nexpaq 1:55a6170b404f 229 if( hardclock_init == 0 )
nexpaq 1:55a6170b404f 230 {
nexpaq 1:55a6170b404f 231 gettimeofday( &tv_init, NULL );
nexpaq 1:55a6170b404f 232 hardclock_init = 1;
nexpaq 1:55a6170b404f 233 }
nexpaq 1:55a6170b404f 234
nexpaq 1:55a6170b404f 235 gettimeofday( &tv_cur, NULL );
nexpaq 1:55a6170b404f 236 return( ( tv_cur.tv_sec - tv_init.tv_sec ) * 1000000
nexpaq 1:55a6170b404f 237 + ( tv_cur.tv_usec - tv_init.tv_usec ) );
nexpaq 1:55a6170b404f 238 }
nexpaq 1:55a6170b404f 239 #endif /* !HAVE_HARDCLOCK */
nexpaq 1:55a6170b404f 240
nexpaq 1:55a6170b404f 241 volatile int mbedtls_timing_alarmed = 0;
nexpaq 1:55a6170b404f 242
nexpaq 1:55a6170b404f 243 #if defined(_WIN32) && !defined(EFIX64) && !defined(EFI32)
nexpaq 1:55a6170b404f 244
nexpaq 1:55a6170b404f 245 unsigned long mbedtls_timing_get_timer( struct mbedtls_timing_hr_time *val, int reset )
nexpaq 1:55a6170b404f 246 {
nexpaq 1:55a6170b404f 247 unsigned long delta;
nexpaq 1:55a6170b404f 248 LARGE_INTEGER offset, hfreq;
nexpaq 1:55a6170b404f 249 struct _hr_time *t = (struct _hr_time *) val;
nexpaq 1:55a6170b404f 250
nexpaq 1:55a6170b404f 251 QueryPerformanceCounter( &offset );
nexpaq 1:55a6170b404f 252 QueryPerformanceFrequency( &hfreq );
nexpaq 1:55a6170b404f 253
nexpaq 1:55a6170b404f 254 delta = (unsigned long)( ( 1000 *
nexpaq 1:55a6170b404f 255 ( offset.QuadPart - t->start.QuadPart ) ) /
nexpaq 1:55a6170b404f 256 hfreq.QuadPart );
nexpaq 1:55a6170b404f 257
nexpaq 1:55a6170b404f 258 if( reset )
nexpaq 1:55a6170b404f 259 QueryPerformanceCounter( &t->start );
nexpaq 1:55a6170b404f 260
nexpaq 1:55a6170b404f 261 return( delta );
nexpaq 1:55a6170b404f 262 }
nexpaq 1:55a6170b404f 263
nexpaq 1:55a6170b404f 264 /* It's OK to use a global because alarm() is supposed to be global anyway */
nexpaq 1:55a6170b404f 265 static DWORD alarmMs;
nexpaq 1:55a6170b404f 266
nexpaq 1:55a6170b404f 267 static DWORD WINAPI TimerProc( LPVOID TimerContext )
nexpaq 1:55a6170b404f 268 {
nexpaq 1:55a6170b404f 269 ((void) TimerContext);
nexpaq 1:55a6170b404f 270 Sleep( alarmMs );
nexpaq 1:55a6170b404f 271 mbedtls_timing_alarmed = 1;
nexpaq 1:55a6170b404f 272 return( TRUE );
nexpaq 1:55a6170b404f 273 }
nexpaq 1:55a6170b404f 274
nexpaq 1:55a6170b404f 275 void mbedtls_set_alarm( int seconds )
nexpaq 1:55a6170b404f 276 {
nexpaq 1:55a6170b404f 277 DWORD ThreadId;
nexpaq 1:55a6170b404f 278
nexpaq 1:55a6170b404f 279 mbedtls_timing_alarmed = 0;
nexpaq 1:55a6170b404f 280 alarmMs = seconds * 1000;
nexpaq 1:55a6170b404f 281 CloseHandle( CreateThread( NULL, 0, TimerProc, NULL, 0, &ThreadId ) );
nexpaq 1:55a6170b404f 282 }
nexpaq 1:55a6170b404f 283
nexpaq 1:55a6170b404f 284 #else /* _WIN32 && !EFIX64 && !EFI32 */
nexpaq 1:55a6170b404f 285
nexpaq 1:55a6170b404f 286 unsigned long mbedtls_timing_get_timer( struct mbedtls_timing_hr_time *val, int reset )
nexpaq 1:55a6170b404f 287 {
nexpaq 1:55a6170b404f 288 unsigned long delta;
nexpaq 1:55a6170b404f 289 struct timeval offset;
nexpaq 1:55a6170b404f 290 struct _hr_time *t = (struct _hr_time *) val;
nexpaq 1:55a6170b404f 291
nexpaq 1:55a6170b404f 292 gettimeofday( &offset, NULL );
nexpaq 1:55a6170b404f 293
nexpaq 1:55a6170b404f 294 if( reset )
nexpaq 1:55a6170b404f 295 {
nexpaq 1:55a6170b404f 296 t->start.tv_sec = offset.tv_sec;
nexpaq 1:55a6170b404f 297 t->start.tv_usec = offset.tv_usec;
nexpaq 1:55a6170b404f 298 return( 0 );
nexpaq 1:55a6170b404f 299 }
nexpaq 1:55a6170b404f 300
nexpaq 1:55a6170b404f 301 delta = ( offset.tv_sec - t->start.tv_sec ) * 1000
nexpaq 1:55a6170b404f 302 + ( offset.tv_usec - t->start.tv_usec ) / 1000;
nexpaq 1:55a6170b404f 303
nexpaq 1:55a6170b404f 304 return( delta );
nexpaq 1:55a6170b404f 305 }
nexpaq 1:55a6170b404f 306
nexpaq 1:55a6170b404f 307 static void sighandler( int signum )
nexpaq 1:55a6170b404f 308 {
nexpaq 1:55a6170b404f 309 mbedtls_timing_alarmed = 1;
nexpaq 1:55a6170b404f 310 signal( signum, sighandler );
nexpaq 1:55a6170b404f 311 }
nexpaq 1:55a6170b404f 312
nexpaq 1:55a6170b404f 313 void mbedtls_set_alarm( int seconds )
nexpaq 1:55a6170b404f 314 {
nexpaq 1:55a6170b404f 315 mbedtls_timing_alarmed = 0;
nexpaq 1:55a6170b404f 316 signal( SIGALRM, sighandler );
nexpaq 1:55a6170b404f 317 alarm( seconds );
nexpaq 1:55a6170b404f 318 }
nexpaq 1:55a6170b404f 319
nexpaq 1:55a6170b404f 320 #endif /* _WIN32 && !EFIX64 && !EFI32 */
nexpaq 1:55a6170b404f 321
nexpaq 1:55a6170b404f 322 /*
nexpaq 1:55a6170b404f 323 * Set delays to watch
nexpaq 1:55a6170b404f 324 */
nexpaq 1:55a6170b404f 325 void mbedtls_timing_set_delay( void *data, uint32_t int_ms, uint32_t fin_ms )
nexpaq 1:55a6170b404f 326 {
nexpaq 1:55a6170b404f 327 mbedtls_timing_delay_context *ctx = (mbedtls_timing_delay_context *) data;
nexpaq 1:55a6170b404f 328
nexpaq 1:55a6170b404f 329 ctx->int_ms = int_ms;
nexpaq 1:55a6170b404f 330 ctx->fin_ms = fin_ms;
nexpaq 1:55a6170b404f 331
nexpaq 1:55a6170b404f 332 if( fin_ms != 0 )
nexpaq 1:55a6170b404f 333 (void) mbedtls_timing_get_timer( &ctx->timer, 1 );
nexpaq 1:55a6170b404f 334 }
nexpaq 1:55a6170b404f 335
nexpaq 1:55a6170b404f 336 /*
nexpaq 1:55a6170b404f 337 * Get number of delays expired
nexpaq 1:55a6170b404f 338 */
nexpaq 1:55a6170b404f 339 int mbedtls_timing_get_delay( void *data )
nexpaq 1:55a6170b404f 340 {
nexpaq 1:55a6170b404f 341 mbedtls_timing_delay_context *ctx = (mbedtls_timing_delay_context *) data;
nexpaq 1:55a6170b404f 342 unsigned long elapsed_ms;
nexpaq 1:55a6170b404f 343
nexpaq 1:55a6170b404f 344 if( ctx->fin_ms == 0 )
nexpaq 1:55a6170b404f 345 return( -1 );
nexpaq 1:55a6170b404f 346
nexpaq 1:55a6170b404f 347 elapsed_ms = mbedtls_timing_get_timer( &ctx->timer, 0 );
nexpaq 1:55a6170b404f 348
nexpaq 1:55a6170b404f 349 if( elapsed_ms >= ctx->fin_ms )
nexpaq 1:55a6170b404f 350 return( 2 );
nexpaq 1:55a6170b404f 351
nexpaq 1:55a6170b404f 352 if( elapsed_ms >= ctx->int_ms )
nexpaq 1:55a6170b404f 353 return( 1 );
nexpaq 1:55a6170b404f 354
nexpaq 1:55a6170b404f 355 return( 0 );
nexpaq 1:55a6170b404f 356 }
nexpaq 1:55a6170b404f 357
nexpaq 1:55a6170b404f 358 #endif /* !MBEDTLS_TIMING_ALT */
nexpaq 1:55a6170b404f 359
nexpaq 1:55a6170b404f 360 #if defined(MBEDTLS_SELF_TEST)
nexpaq 1:55a6170b404f 361
nexpaq 1:55a6170b404f 362 /*
nexpaq 1:55a6170b404f 363 * Busy-waits for the given number of milliseconds.
nexpaq 1:55a6170b404f 364 * Used for testing mbedtls_timing_hardclock.
nexpaq 1:55a6170b404f 365 */
nexpaq 1:55a6170b404f 366 static void busy_msleep( unsigned long msec )
nexpaq 1:55a6170b404f 367 {
nexpaq 1:55a6170b404f 368 struct mbedtls_timing_hr_time hires;
nexpaq 1:55a6170b404f 369 unsigned long i = 0; /* for busy-waiting */
nexpaq 1:55a6170b404f 370 volatile unsigned long j; /* to prevent optimisation */
nexpaq 1:55a6170b404f 371
nexpaq 1:55a6170b404f 372 (void) mbedtls_timing_get_timer( &hires, 1 );
nexpaq 1:55a6170b404f 373
nexpaq 1:55a6170b404f 374 while( mbedtls_timing_get_timer( &hires, 0 ) < msec )
nexpaq 1:55a6170b404f 375 i++;
nexpaq 1:55a6170b404f 376
nexpaq 1:55a6170b404f 377 j = i;
nexpaq 1:55a6170b404f 378 (void) j;
nexpaq 1:55a6170b404f 379 }
nexpaq 1:55a6170b404f 380
nexpaq 1:55a6170b404f 381 #define FAIL do \
nexpaq 1:55a6170b404f 382 { \
nexpaq 1:55a6170b404f 383 if( verbose != 0 ) \
nexpaq 1:55a6170b404f 384 mbedtls_printf( "failed\n" ); \
nexpaq 1:55a6170b404f 385 \
nexpaq 1:55a6170b404f 386 return( 1 ); \
nexpaq 1:55a6170b404f 387 } while( 0 )
nexpaq 1:55a6170b404f 388
nexpaq 1:55a6170b404f 389 /*
nexpaq 1:55a6170b404f 390 * Checkup routine
nexpaq 1:55a6170b404f 391 *
nexpaq 1:55a6170b404f 392 * Warning: this is work in progress, some tests may not be reliable enough
nexpaq 1:55a6170b404f 393 * yet! False positives may happen.
nexpaq 1:55a6170b404f 394 */
nexpaq 1:55a6170b404f 395 int mbedtls_timing_self_test( int verbose )
nexpaq 1:55a6170b404f 396 {
nexpaq 1:55a6170b404f 397 unsigned long cycles, ratio;
nexpaq 1:55a6170b404f 398 unsigned long millisecs, secs;
nexpaq 1:55a6170b404f 399 int hardfail;
nexpaq 1:55a6170b404f 400 struct mbedtls_timing_hr_time hires;
nexpaq 1:55a6170b404f 401 uint32_t a, b;
nexpaq 1:55a6170b404f 402 mbedtls_timing_delay_context ctx;
nexpaq 1:55a6170b404f 403
nexpaq 1:55a6170b404f 404 if( verbose != 0 )
nexpaq 1:55a6170b404f 405 mbedtls_printf( " TIMING tests note: will take some time!\n" );
nexpaq 1:55a6170b404f 406
nexpaq 1:55a6170b404f 407
nexpaq 1:55a6170b404f 408 if( verbose != 0 )
nexpaq 1:55a6170b404f 409 mbedtls_printf( " TIMING test #1 (set_alarm / get_timer): " );
nexpaq 1:55a6170b404f 410
nexpaq 1:55a6170b404f 411 for( secs = 1; secs <= 3; secs++ )
nexpaq 1:55a6170b404f 412 {
nexpaq 1:55a6170b404f 413 (void) mbedtls_timing_get_timer( &hires, 1 );
nexpaq 1:55a6170b404f 414
nexpaq 1:55a6170b404f 415 mbedtls_set_alarm( (int) secs );
nexpaq 1:55a6170b404f 416 while( !mbedtls_timing_alarmed )
nexpaq 1:55a6170b404f 417 ;
nexpaq 1:55a6170b404f 418
nexpaq 1:55a6170b404f 419 millisecs = mbedtls_timing_get_timer( &hires, 0 );
nexpaq 1:55a6170b404f 420
nexpaq 1:55a6170b404f 421 /* For some reason on Windows it looks like alarm has an extra delay
nexpaq 1:55a6170b404f 422 * (maybe related to creating a new thread). Allow some room here. */
nexpaq 1:55a6170b404f 423 if( millisecs < 800 * secs || millisecs > 1200 * secs + 300 )
nexpaq 1:55a6170b404f 424 {
nexpaq 1:55a6170b404f 425 if( verbose != 0 )
nexpaq 1:55a6170b404f 426 mbedtls_printf( "failed\n" );
nexpaq 1:55a6170b404f 427
nexpaq 1:55a6170b404f 428 return( 1 );
nexpaq 1:55a6170b404f 429 }
nexpaq 1:55a6170b404f 430 }
nexpaq 1:55a6170b404f 431
nexpaq 1:55a6170b404f 432 if( verbose != 0 )
nexpaq 1:55a6170b404f 433 mbedtls_printf( "passed\n" );
nexpaq 1:55a6170b404f 434
nexpaq 1:55a6170b404f 435 if( verbose != 0 )
nexpaq 1:55a6170b404f 436 mbedtls_printf( " TIMING test #2 (set/get_delay ): " );
nexpaq 1:55a6170b404f 437
nexpaq 1:55a6170b404f 438 for( a = 200; a <= 400; a += 200 )
nexpaq 1:55a6170b404f 439 {
nexpaq 1:55a6170b404f 440 for( b = 200; b <= 400; b += 200 )
nexpaq 1:55a6170b404f 441 {
nexpaq 1:55a6170b404f 442 mbedtls_timing_set_delay( &ctx, a, a + b );
nexpaq 1:55a6170b404f 443
nexpaq 1:55a6170b404f 444 busy_msleep( a - a / 8 );
nexpaq 1:55a6170b404f 445 if( mbedtls_timing_get_delay( &ctx ) != 0 )
nexpaq 1:55a6170b404f 446 FAIL;
nexpaq 1:55a6170b404f 447
nexpaq 1:55a6170b404f 448 busy_msleep( a / 4 );
nexpaq 1:55a6170b404f 449 if( mbedtls_timing_get_delay( &ctx ) != 1 )
nexpaq 1:55a6170b404f 450 FAIL;
nexpaq 1:55a6170b404f 451
nexpaq 1:55a6170b404f 452 busy_msleep( b - a / 8 - b / 8 );
nexpaq 1:55a6170b404f 453 if( mbedtls_timing_get_delay( &ctx ) != 1 )
nexpaq 1:55a6170b404f 454 FAIL;
nexpaq 1:55a6170b404f 455
nexpaq 1:55a6170b404f 456 busy_msleep( b / 4 );
nexpaq 1:55a6170b404f 457 if( mbedtls_timing_get_delay( &ctx ) != 2 )
nexpaq 1:55a6170b404f 458 FAIL;
nexpaq 1:55a6170b404f 459 }
nexpaq 1:55a6170b404f 460 }
nexpaq 1:55a6170b404f 461
nexpaq 1:55a6170b404f 462 mbedtls_timing_set_delay( &ctx, 0, 0 );
nexpaq 1:55a6170b404f 463 busy_msleep( 200 );
nexpaq 1:55a6170b404f 464 if( mbedtls_timing_get_delay( &ctx ) != -1 )
nexpaq 1:55a6170b404f 465 FAIL;
nexpaq 1:55a6170b404f 466
nexpaq 1:55a6170b404f 467 if( verbose != 0 )
nexpaq 1:55a6170b404f 468 mbedtls_printf( "passed\n" );
nexpaq 1:55a6170b404f 469
nexpaq 1:55a6170b404f 470 if( verbose != 0 )
nexpaq 1:55a6170b404f 471 mbedtls_printf( " TIMING test #3 (hardclock / get_timer): " );
nexpaq 1:55a6170b404f 472
nexpaq 1:55a6170b404f 473 /*
nexpaq 1:55a6170b404f 474 * Allow one failure for possible counter wrapping.
nexpaq 1:55a6170b404f 475 * On a 4Ghz 32-bit machine the cycle counter wraps about once per second;
nexpaq 1:55a6170b404f 476 * since the whole test is about 10ms, it shouldn't happen twice in a row.
nexpaq 1:55a6170b404f 477 */
nexpaq 1:55a6170b404f 478 hardfail = 0;
nexpaq 1:55a6170b404f 479
nexpaq 1:55a6170b404f 480 hard_test:
nexpaq 1:55a6170b404f 481 if( hardfail > 1 )
nexpaq 1:55a6170b404f 482 {
nexpaq 1:55a6170b404f 483 if( verbose != 0 )
nexpaq 1:55a6170b404f 484 mbedtls_printf( "failed (ignored)\n" );
nexpaq 1:55a6170b404f 485
nexpaq 1:55a6170b404f 486 goto hard_test_done;
nexpaq 1:55a6170b404f 487 }
nexpaq 1:55a6170b404f 488
nexpaq 1:55a6170b404f 489 /* Get a reference ratio cycles/ms */
nexpaq 1:55a6170b404f 490 millisecs = 1;
nexpaq 1:55a6170b404f 491 cycles = mbedtls_timing_hardclock();
nexpaq 1:55a6170b404f 492 busy_msleep( millisecs );
nexpaq 1:55a6170b404f 493 cycles = mbedtls_timing_hardclock() - cycles;
nexpaq 1:55a6170b404f 494 ratio = cycles / millisecs;
nexpaq 1:55a6170b404f 495
nexpaq 1:55a6170b404f 496 /* Check that the ratio is mostly constant */
nexpaq 1:55a6170b404f 497 for( millisecs = 2; millisecs <= 4; millisecs++ )
nexpaq 1:55a6170b404f 498 {
nexpaq 1:55a6170b404f 499 cycles = mbedtls_timing_hardclock();
nexpaq 1:55a6170b404f 500 busy_msleep( millisecs );
nexpaq 1:55a6170b404f 501 cycles = mbedtls_timing_hardclock() - cycles;
nexpaq 1:55a6170b404f 502
nexpaq 1:55a6170b404f 503 /* Allow variation up to 20% */
nexpaq 1:55a6170b404f 504 if( cycles / millisecs < ratio - ratio / 5 ||
nexpaq 1:55a6170b404f 505 cycles / millisecs > ratio + ratio / 5 )
nexpaq 1:55a6170b404f 506 {
nexpaq 1:55a6170b404f 507 hardfail++;
nexpaq 1:55a6170b404f 508 goto hard_test;
nexpaq 1:55a6170b404f 509 }
nexpaq 1:55a6170b404f 510 }
nexpaq 1:55a6170b404f 511
nexpaq 1:55a6170b404f 512 if( verbose != 0 )
nexpaq 1:55a6170b404f 513 mbedtls_printf( "passed\n" );
nexpaq 1:55a6170b404f 514
nexpaq 1:55a6170b404f 515 hard_test_done:
nexpaq 1:55a6170b404f 516
nexpaq 1:55a6170b404f 517 if( verbose != 0 )
nexpaq 1:55a6170b404f 518 mbedtls_printf( "\n" );
nexpaq 1:55a6170b404f 519
nexpaq 1:55a6170b404f 520 return( 0 );
nexpaq 1:55a6170b404f 521 }
nexpaq 1:55a6170b404f 522
nexpaq 1:55a6170b404f 523 #endif /* MBEDTLS_SELF_TEST */
nexpaq 1:55a6170b404f 524
nexpaq 1:55a6170b404f 525 #endif /* MBEDTLS_TIMING_C */