erkin yucel
mbed os with nrf51 internal bandgap enabled to read battery level
Dependents: BLE_file_test BLE_Blink ExternalEncoder
features/mbedtls/src/timing.c@0:f269e3021894, 2016-10-23 (annotated)
- Committer:
- elessair
- Date:
- Sun Oct 23 15:10:02 2016 +0000
- Revision:
- 0:f269e3021894
Initial commit
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| elessair | 0:f269e3021894 | 1 | /* |
| elessair | 0:f269e3021894 | 2 | * Portable interface to the CPU cycle counter |
| elessair | 0:f269e3021894 | 3 | * |
| elessair | 0:f269e3021894 | 4 | * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved |
| elessair | 0:f269e3021894 | 5 | * SPDX-License-Identifier: Apache-2.0 |
| elessair | 0:f269e3021894 | 6 | * |
| elessair | 0:f269e3021894 | 7 | * Licensed under the Apache License, Version 2.0 (the "License"); you may |
| elessair | 0:f269e3021894 | 8 | * not use this file except in compliance with the License. |
| elessair | 0:f269e3021894 | 9 | * You may obtain a copy of the License at |
| elessair | 0:f269e3021894 | 10 | * |
| elessair | 0:f269e3021894 | 11 | * http://www.apache.org/licenses/LICENSE-2.0 |
| elessair | 0:f269e3021894 | 12 | * |
| elessair | 0:f269e3021894 | 13 | * Unless required by applicable law or agreed to in writing, software |
| elessair | 0:f269e3021894 | 14 | * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT |
| elessair | 0:f269e3021894 | 15 | * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| elessair | 0:f269e3021894 | 16 | * See the License for the specific language governing permissions and |
| elessair | 0:f269e3021894 | 17 | * limitations under the License. |
| elessair | 0:f269e3021894 | 18 | * |
| elessair | 0:f269e3021894 | 19 | * This file is part of mbed TLS (https://tls.mbed.org) |
| elessair | 0:f269e3021894 | 20 | */ |
| elessair | 0:f269e3021894 | 21 | |
| elessair | 0:f269e3021894 | 22 | #if !defined(MBEDTLS_CONFIG_FILE) |
| elessair | 0:f269e3021894 | 23 | #include "mbedtls/config.h" |
| elessair | 0:f269e3021894 | 24 | #else |
| elessair | 0:f269e3021894 | 25 | #include MBEDTLS_CONFIG_FILE |
| elessair | 0:f269e3021894 | 26 | #endif |
| elessair | 0:f269e3021894 | 27 | |
| elessair | 0:f269e3021894 | 28 | #if defined(MBEDTLS_SELF_TEST) && defined(MBEDTLS_PLATFORM_C) |
| elessair | 0:f269e3021894 | 29 | #include "mbedtls/platform.h" |
| elessair | 0:f269e3021894 | 30 | #else |
| elessair | 0:f269e3021894 | 31 | #include <stdio.h> |
| elessair | 0:f269e3021894 | 32 | #define mbedtls_printf printf |
| elessair | 0:f269e3021894 | 33 | #endif |
| elessair | 0:f269e3021894 | 34 | |
| elessair | 0:f269e3021894 | 35 | #if defined(MBEDTLS_TIMING_C) |
| elessair | 0:f269e3021894 | 36 | |
| elessair | 0:f269e3021894 | 37 | #include "mbedtls/timing.h" |
| elessair | 0:f269e3021894 | 38 | |
| elessair | 0:f269e3021894 | 39 | #if !defined(MBEDTLS_TIMING_ALT) |
| elessair | 0:f269e3021894 | 40 | |
| elessair | 0:f269e3021894 | 41 | #if !defined(unix) && !defined(__unix__) && !defined(__unix) && \ |
| elessair | 0:f269e3021894 | 42 | !defined(__APPLE__) && !defined(_WIN32) |
| elessair | 0:f269e3021894 | 43 | #error "This module only works on Unix and Windows, see MBEDTLS_TIMING_C in config.h" |
| elessair | 0:f269e3021894 | 44 | #endif |
| elessair | 0:f269e3021894 | 45 | |
| elessair | 0:f269e3021894 | 46 | #ifndef asm |
| elessair | 0:f269e3021894 | 47 | #define asm __asm |
| elessair | 0:f269e3021894 | 48 | #endif |
| elessair | 0:f269e3021894 | 49 | |
| elessair | 0:f269e3021894 | 50 | #if defined(_WIN32) && !defined(EFIX64) && !defined(EFI32) |
| elessair | 0:f269e3021894 | 51 | |
| elessair | 0:f269e3021894 | 52 | #include <windows.h> |
| elessair | 0:f269e3021894 | 53 | #include <winbase.h> |
| elessair | 0:f269e3021894 | 54 | |
| elessair | 0:f269e3021894 | 55 | struct _hr_time |
| elessair | 0:f269e3021894 | 56 | { |
| elessair | 0:f269e3021894 | 57 | LARGE_INTEGER start; |
| elessair | 0:f269e3021894 | 58 | }; |
| elessair | 0:f269e3021894 | 59 | |
| elessair | 0:f269e3021894 | 60 | #else |
| elessair | 0:f269e3021894 | 61 | |
| elessair | 0:f269e3021894 | 62 | #include <unistd.h> |
| elessair | 0:f269e3021894 | 63 | #include <sys/types.h> |
| elessair | 0:f269e3021894 | 64 | #include <sys/time.h> |
| elessair | 0:f269e3021894 | 65 | #include <signal.h> |
| elessair | 0:f269e3021894 | 66 | #include <time.h> |
| elessair | 0:f269e3021894 | 67 | |
| elessair | 0:f269e3021894 | 68 | struct _hr_time |
| elessair | 0:f269e3021894 | 69 | { |
| elessair | 0:f269e3021894 | 70 | struct timeval start; |
| elessair | 0:f269e3021894 | 71 | }; |
| elessair | 0:f269e3021894 | 72 | |
| elessair | 0:f269e3021894 | 73 | #endif /* _WIN32 && !EFIX64 && !EFI32 */ |
| elessair | 0:f269e3021894 | 74 | |
| elessair | 0:f269e3021894 | 75 | #if !defined(HAVE_HARDCLOCK) && defined(MBEDTLS_HAVE_ASM) && \ |
| elessair | 0:f269e3021894 | 76 | ( defined(_MSC_VER) && defined(_M_IX86) ) || defined(__WATCOMC__) |
| elessair | 0:f269e3021894 | 77 | |
| elessair | 0:f269e3021894 | 78 | #define HAVE_HARDCLOCK |
| elessair | 0:f269e3021894 | 79 | |
| elessair | 0:f269e3021894 | 80 | unsigned long mbedtls_timing_hardclock( void ) |
| elessair | 0:f269e3021894 | 81 | { |
| elessair | 0:f269e3021894 | 82 | unsigned long tsc; |
| elessair | 0:f269e3021894 | 83 | __asm rdtsc |
| elessair | 0:f269e3021894 | 84 | __asm mov [tsc], eax |
| elessair | 0:f269e3021894 | 85 | return( tsc ); |
| elessair | 0:f269e3021894 | 86 | } |
| elessair | 0:f269e3021894 | 87 | #endif /* !HAVE_HARDCLOCK && MBEDTLS_HAVE_ASM && |
| elessair | 0:f269e3021894 | 88 | ( _MSC_VER && _M_IX86 ) || __WATCOMC__ */ |
| elessair | 0:f269e3021894 | 89 | |
| elessair | 0:f269e3021894 | 90 | /* some versions of mingw-64 have 32-bit longs even on x84_64 */ |
| elessair | 0:f269e3021894 | 91 | #if !defined(HAVE_HARDCLOCK) && defined(MBEDTLS_HAVE_ASM) && \ |
| elessair | 0:f269e3021894 | 92 | defined(__GNUC__) && ( defined(__i386__) || ( \ |
| elessair | 0:f269e3021894 | 93 | ( defined(__amd64__) || defined( __x86_64__) ) && __SIZEOF_LONG__ == 4 ) ) |
| elessair | 0:f269e3021894 | 94 | |
| elessair | 0:f269e3021894 | 95 | #define HAVE_HARDCLOCK |
| elessair | 0:f269e3021894 | 96 | |
| elessair | 0:f269e3021894 | 97 | unsigned long mbedtls_timing_hardclock( void ) |
| elessair | 0:f269e3021894 | 98 | { |
| elessair | 0:f269e3021894 | 99 | unsigned long lo, hi; |
| elessair | 0:f269e3021894 | 100 | asm volatile( "rdtsc" : "=a" (lo), "=d" (hi) ); |
| elessair | 0:f269e3021894 | 101 | return( lo ); |
| elessair | 0:f269e3021894 | 102 | } |
| elessair | 0:f269e3021894 | 103 | #endif /* !HAVE_HARDCLOCK && MBEDTLS_HAVE_ASM && |
| elessair | 0:f269e3021894 | 104 | __GNUC__ && __i386__ */ |
| elessair | 0:f269e3021894 | 105 | |
| elessair | 0:f269e3021894 | 106 | #if !defined(HAVE_HARDCLOCK) && defined(MBEDTLS_HAVE_ASM) && \ |
| elessair | 0:f269e3021894 | 107 | defined(__GNUC__) && ( defined(__amd64__) || defined(__x86_64__) ) |
| elessair | 0:f269e3021894 | 108 | |
| elessair | 0:f269e3021894 | 109 | #define HAVE_HARDCLOCK |
| elessair | 0:f269e3021894 | 110 | |
| elessair | 0:f269e3021894 | 111 | unsigned long mbedtls_timing_hardclock( void ) |
| elessair | 0:f269e3021894 | 112 | { |
| elessair | 0:f269e3021894 | 113 | unsigned long lo, hi; |
| elessair | 0:f269e3021894 | 114 | asm volatile( "rdtsc" : "=a" (lo), "=d" (hi) ); |
| elessair | 0:f269e3021894 | 115 | return( lo | ( hi << 32 ) ); |
| elessair | 0:f269e3021894 | 116 | } |
| elessair | 0:f269e3021894 | 117 | #endif /* !HAVE_HARDCLOCK && MBEDTLS_HAVE_ASM && |
| elessair | 0:f269e3021894 | 118 | __GNUC__ && ( __amd64__ || __x86_64__ ) */ |
| elessair | 0:f269e3021894 | 119 | |
| elessair | 0:f269e3021894 | 120 | #if !defined(HAVE_HARDCLOCK) && defined(MBEDTLS_HAVE_ASM) && \ |
| elessair | 0:f269e3021894 | 121 | defined(__GNUC__) && ( defined(__powerpc__) || defined(__ppc__) ) |
| elessair | 0:f269e3021894 | 122 | |
| elessair | 0:f269e3021894 | 123 | #define HAVE_HARDCLOCK |
| elessair | 0:f269e3021894 | 124 | |
| elessair | 0:f269e3021894 | 125 | unsigned long mbedtls_timing_hardclock( void ) |
| elessair | 0:f269e3021894 | 126 | { |
| elessair | 0:f269e3021894 | 127 | unsigned long tbl, tbu0, tbu1; |
| elessair | 0:f269e3021894 | 128 | |
| elessair | 0:f269e3021894 | 129 | do |
| elessair | 0:f269e3021894 | 130 | { |
| elessair | 0:f269e3021894 | 131 | asm volatile( "mftbu %0" : "=r" (tbu0) ); |
| elessair | 0:f269e3021894 | 132 | asm volatile( "mftb %0" : "=r" (tbl ) ); |
| elessair | 0:f269e3021894 | 133 | asm volatile( "mftbu %0" : "=r" (tbu1) ); |
| elessair | 0:f269e3021894 | 134 | } |
| elessair | 0:f269e3021894 | 135 | while( tbu0 != tbu1 ); |
| elessair | 0:f269e3021894 | 136 | |
| elessair | 0:f269e3021894 | 137 | return( tbl ); |
| elessair | 0:f269e3021894 | 138 | } |
| elessair | 0:f269e3021894 | 139 | #endif /* !HAVE_HARDCLOCK && MBEDTLS_HAVE_ASM && |
| elessair | 0:f269e3021894 | 140 | __GNUC__ && ( __powerpc__ || __ppc__ ) */ |
| elessair | 0:f269e3021894 | 141 | |
| elessair | 0:f269e3021894 | 142 | #if !defined(HAVE_HARDCLOCK) && defined(MBEDTLS_HAVE_ASM) && \ |
| elessair | 0:f269e3021894 | 143 | defined(__GNUC__) && defined(__sparc64__) |
| elessair | 0:f269e3021894 | 144 | |
| elessair | 0:f269e3021894 | 145 | #if defined(__OpenBSD__) |
| elessair | 0:f269e3021894 | 146 | #warning OpenBSD does not allow access to tick register using software version instead |
| elessair | 0:f269e3021894 | 147 | #else |
| elessair | 0:f269e3021894 | 148 | #define HAVE_HARDCLOCK |
| elessair | 0:f269e3021894 | 149 | |
| elessair | 0:f269e3021894 | 150 | unsigned long mbedtls_timing_hardclock( void ) |
| elessair | 0:f269e3021894 | 151 | { |
| elessair | 0:f269e3021894 | 152 | unsigned long tick; |
| elessair | 0:f269e3021894 | 153 | asm volatile( "rdpr %%tick, %0;" : "=&r" (tick) ); |
| elessair | 0:f269e3021894 | 154 | return( tick ); |
| elessair | 0:f269e3021894 | 155 | } |
| elessair | 0:f269e3021894 | 156 | #endif /* __OpenBSD__ */ |
| elessair | 0:f269e3021894 | 157 | #endif /* !HAVE_HARDCLOCK && MBEDTLS_HAVE_ASM && |
| elessair | 0:f269e3021894 | 158 | __GNUC__ && __sparc64__ */ |
| elessair | 0:f269e3021894 | 159 | |
| elessair | 0:f269e3021894 | 160 | #if !defined(HAVE_HARDCLOCK) && defined(MBEDTLS_HAVE_ASM) && \ |
| elessair | 0:f269e3021894 | 161 | defined(__GNUC__) && defined(__sparc__) && !defined(__sparc64__) |
| elessair | 0:f269e3021894 | 162 | |
| elessair | 0:f269e3021894 | 163 | #define HAVE_HARDCLOCK |
| elessair | 0:f269e3021894 | 164 | |
| elessair | 0:f269e3021894 | 165 | unsigned long mbedtls_timing_hardclock( void ) |
| elessair | 0:f269e3021894 | 166 | { |
| elessair | 0:f269e3021894 | 167 | unsigned long tick; |
| elessair | 0:f269e3021894 | 168 | asm volatile( ".byte 0x83, 0x41, 0x00, 0x00" ); |
| elessair | 0:f269e3021894 | 169 | asm volatile( "mov %%g1, %0" : "=r" (tick) ); |
| elessair | 0:f269e3021894 | 170 | return( tick ); |
| elessair | 0:f269e3021894 | 171 | } |
| elessair | 0:f269e3021894 | 172 | #endif /* !HAVE_HARDCLOCK && MBEDTLS_HAVE_ASM && |
| elessair | 0:f269e3021894 | 173 | __GNUC__ && __sparc__ && !__sparc64__ */ |
| elessair | 0:f269e3021894 | 174 | |
| elessair | 0:f269e3021894 | 175 | #if !defined(HAVE_HARDCLOCK) && defined(MBEDTLS_HAVE_ASM) && \ |
| elessair | 0:f269e3021894 | 176 | defined(__GNUC__) && defined(__alpha__) |
| elessair | 0:f269e3021894 | 177 | |
| elessair | 0:f269e3021894 | 178 | #define HAVE_HARDCLOCK |
| elessair | 0:f269e3021894 | 179 | |
| elessair | 0:f269e3021894 | 180 | unsigned long mbedtls_timing_hardclock( void ) |
| elessair | 0:f269e3021894 | 181 | { |
| elessair | 0:f269e3021894 | 182 | unsigned long cc; |
| elessair | 0:f269e3021894 | 183 | asm volatile( "rpcc %0" : "=r" (cc) ); |
| elessair | 0:f269e3021894 | 184 | return( cc & 0xFFFFFFFF ); |
| elessair | 0:f269e3021894 | 185 | } |
| elessair | 0:f269e3021894 | 186 | #endif /* !HAVE_HARDCLOCK && MBEDTLS_HAVE_ASM && |
| elessair | 0:f269e3021894 | 187 | __GNUC__ && __alpha__ */ |
| elessair | 0:f269e3021894 | 188 | |
| elessair | 0:f269e3021894 | 189 | #if !defined(HAVE_HARDCLOCK) && defined(MBEDTLS_HAVE_ASM) && \ |
| elessair | 0:f269e3021894 | 190 | defined(__GNUC__) && defined(__ia64__) |
| elessair | 0:f269e3021894 | 191 | |
| elessair | 0:f269e3021894 | 192 | #define HAVE_HARDCLOCK |
| elessair | 0:f269e3021894 | 193 | |
| elessair | 0:f269e3021894 | 194 | unsigned long mbedtls_timing_hardclock( void ) |
| elessair | 0:f269e3021894 | 195 | { |
| elessair | 0:f269e3021894 | 196 | unsigned long itc; |
| elessair | 0:f269e3021894 | 197 | asm volatile( "mov %0 = ar.itc" : "=r" (itc) ); |
| elessair | 0:f269e3021894 | 198 | return( itc ); |
| elessair | 0:f269e3021894 | 199 | } |
| elessair | 0:f269e3021894 | 200 | #endif /* !HAVE_HARDCLOCK && MBEDTLS_HAVE_ASM && |
| elessair | 0:f269e3021894 | 201 | __GNUC__ && __ia64__ */ |
| elessair | 0:f269e3021894 | 202 | |
| elessair | 0:f269e3021894 | 203 | #if !defined(HAVE_HARDCLOCK) && defined(_MSC_VER) && \ |
| elessair | 0:f269e3021894 | 204 | !defined(EFIX64) && !defined(EFI32) |
| elessair | 0:f269e3021894 | 205 | |
| elessair | 0:f269e3021894 | 206 | #define HAVE_HARDCLOCK |
| elessair | 0:f269e3021894 | 207 | |
| elessair | 0:f269e3021894 | 208 | unsigned long mbedtls_timing_hardclock( void ) |
| elessair | 0:f269e3021894 | 209 | { |
| elessair | 0:f269e3021894 | 210 | LARGE_INTEGER offset; |
| elessair | 0:f269e3021894 | 211 | |
| elessair | 0:f269e3021894 | 212 | QueryPerformanceCounter( &offset ); |
| elessair | 0:f269e3021894 | 213 | |
| elessair | 0:f269e3021894 | 214 | return( (unsigned long)( offset.QuadPart ) ); |
| elessair | 0:f269e3021894 | 215 | } |
| elessair | 0:f269e3021894 | 216 | #endif /* !HAVE_HARDCLOCK && _MSC_VER && !EFIX64 && !EFI32 */ |
| elessair | 0:f269e3021894 | 217 | |
| elessair | 0:f269e3021894 | 218 | #if !defined(HAVE_HARDCLOCK) |
| elessair | 0:f269e3021894 | 219 | |
| elessair | 0:f269e3021894 | 220 | #define HAVE_HARDCLOCK |
| elessair | 0:f269e3021894 | 221 | |
| elessair | 0:f269e3021894 | 222 | static int hardclock_init = 0; |
| elessair | 0:f269e3021894 | 223 | static struct timeval tv_init; |
| elessair | 0:f269e3021894 | 224 | |
| elessair | 0:f269e3021894 | 225 | unsigned long mbedtls_timing_hardclock( void ) |
| elessair | 0:f269e3021894 | 226 | { |
| elessair | 0:f269e3021894 | 227 | struct timeval tv_cur; |
| elessair | 0:f269e3021894 | 228 | |
| elessair | 0:f269e3021894 | 229 | if( hardclock_init == 0 ) |
| elessair | 0:f269e3021894 | 230 | { |
| elessair | 0:f269e3021894 | 231 | gettimeofday( &tv_init, NULL ); |
| elessair | 0:f269e3021894 | 232 | hardclock_init = 1; |
| elessair | 0:f269e3021894 | 233 | } |
| elessair | 0:f269e3021894 | 234 | |
| elessair | 0:f269e3021894 | 235 | gettimeofday( &tv_cur, NULL ); |
| elessair | 0:f269e3021894 | 236 | return( ( tv_cur.tv_sec - tv_init.tv_sec ) * 1000000 |
| elessair | 0:f269e3021894 | 237 | + ( tv_cur.tv_usec - tv_init.tv_usec ) ); |
| elessair | 0:f269e3021894 | 238 | } |
| elessair | 0:f269e3021894 | 239 | #endif /* !HAVE_HARDCLOCK */ |
| elessair | 0:f269e3021894 | 240 | |
| elessair | 0:f269e3021894 | 241 | volatile int mbedtls_timing_alarmed = 0; |
| elessair | 0:f269e3021894 | 242 | |
| elessair | 0:f269e3021894 | 243 | #if defined(_WIN32) && !defined(EFIX64) && !defined(EFI32) |
| elessair | 0:f269e3021894 | 244 | |
| elessair | 0:f269e3021894 | 245 | unsigned long mbedtls_timing_get_timer( struct mbedtls_timing_hr_time *val, int reset ) |
| elessair | 0:f269e3021894 | 246 | { |
| elessair | 0:f269e3021894 | 247 | unsigned long delta; |
| elessair | 0:f269e3021894 | 248 | LARGE_INTEGER offset, hfreq; |
| elessair | 0:f269e3021894 | 249 | struct _hr_time *t = (struct _hr_time *) val; |
| elessair | 0:f269e3021894 | 250 | |
| elessair | 0:f269e3021894 | 251 | QueryPerformanceCounter( &offset ); |
| elessair | 0:f269e3021894 | 252 | QueryPerformanceFrequency( &hfreq ); |
| elessair | 0:f269e3021894 | 253 | |
| elessair | 0:f269e3021894 | 254 | delta = (unsigned long)( ( 1000 * |
| elessair | 0:f269e3021894 | 255 | ( offset.QuadPart - t->start.QuadPart ) ) / |
| elessair | 0:f269e3021894 | 256 | hfreq.QuadPart ); |
| elessair | 0:f269e3021894 | 257 | |
| elessair | 0:f269e3021894 | 258 | if( reset ) |
| elessair | 0:f269e3021894 | 259 | QueryPerformanceCounter( &t->start ); |
| elessair | 0:f269e3021894 | 260 | |
| elessair | 0:f269e3021894 | 261 | return( delta ); |
| elessair | 0:f269e3021894 | 262 | } |
| elessair | 0:f269e3021894 | 263 | |
| elessair | 0:f269e3021894 | 264 | /* It's OK to use a global because alarm() is supposed to be global anyway */ |
| elessair | 0:f269e3021894 | 265 | static DWORD alarmMs; |
| elessair | 0:f269e3021894 | 266 | |
| elessair | 0:f269e3021894 | 267 | static DWORD WINAPI TimerProc( LPVOID TimerContext ) |
| elessair | 0:f269e3021894 | 268 | { |
| elessair | 0:f269e3021894 | 269 | ((void) TimerContext); |
| elessair | 0:f269e3021894 | 270 | Sleep( alarmMs ); |
| elessair | 0:f269e3021894 | 271 | mbedtls_timing_alarmed = 1; |
| elessair | 0:f269e3021894 | 272 | return( TRUE ); |
| elessair | 0:f269e3021894 | 273 | } |
| elessair | 0:f269e3021894 | 274 | |
| elessair | 0:f269e3021894 | 275 | void mbedtls_set_alarm( int seconds ) |
| elessair | 0:f269e3021894 | 276 | { |
| elessair | 0:f269e3021894 | 277 | DWORD ThreadId; |
| elessair | 0:f269e3021894 | 278 | |
| elessair | 0:f269e3021894 | 279 | mbedtls_timing_alarmed = 0; |
| elessair | 0:f269e3021894 | 280 | alarmMs = seconds * 1000; |
| elessair | 0:f269e3021894 | 281 | CloseHandle( CreateThread( NULL, 0, TimerProc, NULL, 0, &ThreadId ) ); |
| elessair | 0:f269e3021894 | 282 | } |
| elessair | 0:f269e3021894 | 283 | |
| elessair | 0:f269e3021894 | 284 | #else /* _WIN32 && !EFIX64 && !EFI32 */ |
| elessair | 0:f269e3021894 | 285 | |
| elessair | 0:f269e3021894 | 286 | unsigned long mbedtls_timing_get_timer( struct mbedtls_timing_hr_time *val, int reset ) |
| elessair | 0:f269e3021894 | 287 | { |
| elessair | 0:f269e3021894 | 288 | unsigned long delta; |
| elessair | 0:f269e3021894 | 289 | struct timeval offset; |
| elessair | 0:f269e3021894 | 290 | struct _hr_time *t = (struct _hr_time *) val; |
| elessair | 0:f269e3021894 | 291 | |
| elessair | 0:f269e3021894 | 292 | gettimeofday( &offset, NULL ); |
| elessair | 0:f269e3021894 | 293 | |
| elessair | 0:f269e3021894 | 294 | if( reset ) |
| elessair | 0:f269e3021894 | 295 | { |
| elessair | 0:f269e3021894 | 296 | t->start.tv_sec = offset.tv_sec; |
| elessair | 0:f269e3021894 | 297 | t->start.tv_usec = offset.tv_usec; |
| elessair | 0:f269e3021894 | 298 | return( 0 ); |
| elessair | 0:f269e3021894 | 299 | } |
| elessair | 0:f269e3021894 | 300 | |
| elessair | 0:f269e3021894 | 301 | delta = ( offset.tv_sec - t->start.tv_sec ) * 1000 |
| elessair | 0:f269e3021894 | 302 | + ( offset.tv_usec - t->start.tv_usec ) / 1000; |
| elessair | 0:f269e3021894 | 303 | |
| elessair | 0:f269e3021894 | 304 | return( delta ); |
| elessair | 0:f269e3021894 | 305 | } |
| elessair | 0:f269e3021894 | 306 | |
| elessair | 0:f269e3021894 | 307 | static void sighandler( int signum ) |
| elessair | 0:f269e3021894 | 308 | { |
| elessair | 0:f269e3021894 | 309 | mbedtls_timing_alarmed = 1; |
| elessair | 0:f269e3021894 | 310 | signal( signum, sighandler ); |
| elessair | 0:f269e3021894 | 311 | } |
| elessair | 0:f269e3021894 | 312 | |
| elessair | 0:f269e3021894 | 313 | void mbedtls_set_alarm( int seconds ) |
| elessair | 0:f269e3021894 | 314 | { |
| elessair | 0:f269e3021894 | 315 | mbedtls_timing_alarmed = 0; |
| elessair | 0:f269e3021894 | 316 | signal( SIGALRM, sighandler ); |
| elessair | 0:f269e3021894 | 317 | alarm( seconds ); |
| elessair | 0:f269e3021894 | 318 | } |
| elessair | 0:f269e3021894 | 319 | |
| elessair | 0:f269e3021894 | 320 | #endif /* _WIN32 && !EFIX64 && !EFI32 */ |
| elessair | 0:f269e3021894 | 321 | |
| elessair | 0:f269e3021894 | 322 | /* |
| elessair | 0:f269e3021894 | 323 | * Set delays to watch |
| elessair | 0:f269e3021894 | 324 | */ |
| elessair | 0:f269e3021894 | 325 | void mbedtls_timing_set_delay( void *data, uint32_t int_ms, uint32_t fin_ms ) |
| elessair | 0:f269e3021894 | 326 | { |
| elessair | 0:f269e3021894 | 327 | mbedtls_timing_delay_context *ctx = (mbedtls_timing_delay_context *) data; |
| elessair | 0:f269e3021894 | 328 | |
| elessair | 0:f269e3021894 | 329 | ctx->int_ms = int_ms; |
| elessair | 0:f269e3021894 | 330 | ctx->fin_ms = fin_ms; |
| elessair | 0:f269e3021894 | 331 | |
| elessair | 0:f269e3021894 | 332 | if( fin_ms != 0 ) |
| elessair | 0:f269e3021894 | 333 | (void) mbedtls_timing_get_timer( &ctx->timer, 1 ); |
| elessair | 0:f269e3021894 | 334 | } |
| elessair | 0:f269e3021894 | 335 | |
| elessair | 0:f269e3021894 | 336 | /* |
| elessair | 0:f269e3021894 | 337 | * Get number of delays expired |
| elessair | 0:f269e3021894 | 338 | */ |
| elessair | 0:f269e3021894 | 339 | int mbedtls_timing_get_delay( void *data ) |
| elessair | 0:f269e3021894 | 340 | { |
| elessair | 0:f269e3021894 | 341 | mbedtls_timing_delay_context *ctx = (mbedtls_timing_delay_context *) data; |
| elessair | 0:f269e3021894 | 342 | unsigned long elapsed_ms; |
| elessair | 0:f269e3021894 | 343 | |
| elessair | 0:f269e3021894 | 344 | if( ctx->fin_ms == 0 ) |
| elessair | 0:f269e3021894 | 345 | return( -1 ); |
| elessair | 0:f269e3021894 | 346 | |
| elessair | 0:f269e3021894 | 347 | elapsed_ms = mbedtls_timing_get_timer( &ctx->timer, 0 ); |
| elessair | 0:f269e3021894 | 348 | |
| elessair | 0:f269e3021894 | 349 | if( elapsed_ms >= ctx->fin_ms ) |
| elessair | 0:f269e3021894 | 350 | return( 2 ); |
| elessair | 0:f269e3021894 | 351 | |
| elessair | 0:f269e3021894 | 352 | if( elapsed_ms >= ctx->int_ms ) |
| elessair | 0:f269e3021894 | 353 | return( 1 ); |
| elessair | 0:f269e3021894 | 354 | |
| elessair | 0:f269e3021894 | 355 | return( 0 ); |
| elessair | 0:f269e3021894 | 356 | } |
| elessair | 0:f269e3021894 | 357 | |
| elessair | 0:f269e3021894 | 358 | #endif /* !MBEDTLS_TIMING_ALT */ |
| elessair | 0:f269e3021894 | 359 | |
| elessair | 0:f269e3021894 | 360 | #if defined(MBEDTLS_SELF_TEST) |
| elessair | 0:f269e3021894 | 361 | |
| elessair | 0:f269e3021894 | 362 | /* |
| elessair | 0:f269e3021894 | 363 | * Busy-waits for the given number of milliseconds. |
| elessair | 0:f269e3021894 | 364 | * Used for testing mbedtls_timing_hardclock. |
| elessair | 0:f269e3021894 | 365 | */ |
| elessair | 0:f269e3021894 | 366 | static void busy_msleep( unsigned long msec ) |
| elessair | 0:f269e3021894 | 367 | { |
| elessair | 0:f269e3021894 | 368 | struct mbedtls_timing_hr_time hires; |
| elessair | 0:f269e3021894 | 369 | unsigned long i = 0; /* for busy-waiting */ |
| elessair | 0:f269e3021894 | 370 | volatile unsigned long j; /* to prevent optimisation */ |
| elessair | 0:f269e3021894 | 371 | |
| elessair | 0:f269e3021894 | 372 | (void) mbedtls_timing_get_timer( &hires, 1 ); |
| elessair | 0:f269e3021894 | 373 | |
| elessair | 0:f269e3021894 | 374 | while( mbedtls_timing_get_timer( &hires, 0 ) < msec ) |
| elessair | 0:f269e3021894 | 375 | i++; |
| elessair | 0:f269e3021894 | 376 | |
| elessair | 0:f269e3021894 | 377 | j = i; |
| elessair | 0:f269e3021894 | 378 | (void) j; |
| elessair | 0:f269e3021894 | 379 | } |
| elessair | 0:f269e3021894 | 380 | |
| elessair | 0:f269e3021894 | 381 | #define FAIL do \ |
| elessair | 0:f269e3021894 | 382 | { \ |
| elessair | 0:f269e3021894 | 383 | if( verbose != 0 ) \ |
| elessair | 0:f269e3021894 | 384 | mbedtls_printf( "failed\n" ); \ |
| elessair | 0:f269e3021894 | 385 | \ |
| elessair | 0:f269e3021894 | 386 | return( 1 ); \ |
| elessair | 0:f269e3021894 | 387 | } while( 0 ) |
| elessair | 0:f269e3021894 | 388 | |
| elessair | 0:f269e3021894 | 389 | /* |
| elessair | 0:f269e3021894 | 390 | * Checkup routine |
| elessair | 0:f269e3021894 | 391 | * |
| elessair | 0:f269e3021894 | 392 | * Warning: this is work in progress, some tests may not be reliable enough |
| elessair | 0:f269e3021894 | 393 | * yet! False positives may happen. |
| elessair | 0:f269e3021894 | 394 | */ |
| elessair | 0:f269e3021894 | 395 | int mbedtls_timing_self_test( int verbose ) |
| elessair | 0:f269e3021894 | 396 | { |
| elessair | 0:f269e3021894 | 397 | unsigned long cycles, ratio; |
| elessair | 0:f269e3021894 | 398 | unsigned long millisecs, secs; |
| elessair | 0:f269e3021894 | 399 | int hardfail; |
| elessair | 0:f269e3021894 | 400 | struct mbedtls_timing_hr_time hires; |
| elessair | 0:f269e3021894 | 401 | uint32_t a, b; |
| elessair | 0:f269e3021894 | 402 | mbedtls_timing_delay_context ctx; |
| elessair | 0:f269e3021894 | 403 | |
| elessair | 0:f269e3021894 | 404 | if( verbose != 0 ) |
| elessair | 0:f269e3021894 | 405 | mbedtls_printf( " TIMING tests note: will take some time!\n" ); |
| elessair | 0:f269e3021894 | 406 | |
| elessair | 0:f269e3021894 | 407 | |
| elessair | 0:f269e3021894 | 408 | if( verbose != 0 ) |
| elessair | 0:f269e3021894 | 409 | mbedtls_printf( " TIMING test #1 (set_alarm / get_timer): " ); |
| elessair | 0:f269e3021894 | 410 | |
| elessair | 0:f269e3021894 | 411 | for( secs = 1; secs <= 3; secs++ ) |
| elessair | 0:f269e3021894 | 412 | { |
| elessair | 0:f269e3021894 | 413 | (void) mbedtls_timing_get_timer( &hires, 1 ); |
| elessair | 0:f269e3021894 | 414 | |
| elessair | 0:f269e3021894 | 415 | mbedtls_set_alarm( (int) secs ); |
| elessair | 0:f269e3021894 | 416 | while( !mbedtls_timing_alarmed ) |
| elessair | 0:f269e3021894 | 417 | ; |
| elessair | 0:f269e3021894 | 418 | |
| elessair | 0:f269e3021894 | 419 | millisecs = mbedtls_timing_get_timer( &hires, 0 ); |
| elessair | 0:f269e3021894 | 420 | |
| elessair | 0:f269e3021894 | 421 | /* For some reason on Windows it looks like alarm has an extra delay |
| elessair | 0:f269e3021894 | 422 | * (maybe related to creating a new thread). Allow some room here. */ |
| elessair | 0:f269e3021894 | 423 | if( millisecs < 800 * secs || millisecs > 1200 * secs + 300 ) |
| elessair | 0:f269e3021894 | 424 | { |
| elessair | 0:f269e3021894 | 425 | if( verbose != 0 ) |
| elessair | 0:f269e3021894 | 426 | mbedtls_printf( "failed\n" ); |
| elessair | 0:f269e3021894 | 427 | |
| elessair | 0:f269e3021894 | 428 | return( 1 ); |
| elessair | 0:f269e3021894 | 429 | } |
| elessair | 0:f269e3021894 | 430 | } |
| elessair | 0:f269e3021894 | 431 | |
| elessair | 0:f269e3021894 | 432 | if( verbose != 0 ) |
| elessair | 0:f269e3021894 | 433 | mbedtls_printf( "passed\n" ); |
| elessair | 0:f269e3021894 | 434 | |
| elessair | 0:f269e3021894 | 435 | if( verbose != 0 ) |
| elessair | 0:f269e3021894 | 436 | mbedtls_printf( " TIMING test #2 (set/get_delay ): " ); |
| elessair | 0:f269e3021894 | 437 | |
| elessair | 0:f269e3021894 | 438 | for( a = 200; a <= 400; a += 200 ) |
| elessair | 0:f269e3021894 | 439 | { |
| elessair | 0:f269e3021894 | 440 | for( b = 200; b <= 400; b += 200 ) |
| elessair | 0:f269e3021894 | 441 | { |
| elessair | 0:f269e3021894 | 442 | mbedtls_timing_set_delay( &ctx, a, a + b ); |
| elessair | 0:f269e3021894 | 443 | |
| elessair | 0:f269e3021894 | 444 | busy_msleep( a - a / 8 ); |
| elessair | 0:f269e3021894 | 445 | if( mbedtls_timing_get_delay( &ctx ) != 0 ) |
| elessair | 0:f269e3021894 | 446 | FAIL; |
| elessair | 0:f269e3021894 | 447 | |
| elessair | 0:f269e3021894 | 448 | busy_msleep( a / 4 ); |
| elessair | 0:f269e3021894 | 449 | if( mbedtls_timing_get_delay( &ctx ) != 1 ) |
| elessair | 0:f269e3021894 | 450 | FAIL; |
| elessair | 0:f269e3021894 | 451 | |
| elessair | 0:f269e3021894 | 452 | busy_msleep( b - a / 8 - b / 8 ); |
| elessair | 0:f269e3021894 | 453 | if( mbedtls_timing_get_delay( &ctx ) != 1 ) |
| elessair | 0:f269e3021894 | 454 | FAIL; |
| elessair | 0:f269e3021894 | 455 | |
| elessair | 0:f269e3021894 | 456 | busy_msleep( b / 4 ); |
| elessair | 0:f269e3021894 | 457 | if( mbedtls_timing_get_delay( &ctx ) != 2 ) |
| elessair | 0:f269e3021894 | 458 | FAIL; |
| elessair | 0:f269e3021894 | 459 | } |
| elessair | 0:f269e3021894 | 460 | } |
| elessair | 0:f269e3021894 | 461 | |
| elessair | 0:f269e3021894 | 462 | mbedtls_timing_set_delay( &ctx, 0, 0 ); |
| elessair | 0:f269e3021894 | 463 | busy_msleep( 200 ); |
| elessair | 0:f269e3021894 | 464 | if( mbedtls_timing_get_delay( &ctx ) != -1 ) |
| elessair | 0:f269e3021894 | 465 | FAIL; |
| elessair | 0:f269e3021894 | 466 | |
| elessair | 0:f269e3021894 | 467 | if( verbose != 0 ) |
| elessair | 0:f269e3021894 | 468 | mbedtls_printf( "passed\n" ); |
| elessair | 0:f269e3021894 | 469 | |
| elessair | 0:f269e3021894 | 470 | if( verbose != 0 ) |
| elessair | 0:f269e3021894 | 471 | mbedtls_printf( " TIMING test #3 (hardclock / get_timer): " ); |
| elessair | 0:f269e3021894 | 472 | |
| elessair | 0:f269e3021894 | 473 | /* |
| elessair | 0:f269e3021894 | 474 | * Allow one failure for possible counter wrapping. |
| elessair | 0:f269e3021894 | 475 | * On a 4Ghz 32-bit machine the cycle counter wraps about once per second; |
| elessair | 0:f269e3021894 | 476 | * since the whole test is about 10ms, it shouldn't happen twice in a row. |
| elessair | 0:f269e3021894 | 477 | */ |
| elessair | 0:f269e3021894 | 478 | hardfail = 0; |
| elessair | 0:f269e3021894 | 479 | |
| elessair | 0:f269e3021894 | 480 | hard_test: |
| elessair | 0:f269e3021894 | 481 | if( hardfail > 1 ) |
| elessair | 0:f269e3021894 | 482 | { |
| elessair | 0:f269e3021894 | 483 | if( verbose != 0 ) |
| elessair | 0:f269e3021894 | 484 | mbedtls_printf( "failed (ignored)\n" ); |
| elessair | 0:f269e3021894 | 485 | |
| elessair | 0:f269e3021894 | 486 | goto hard_test_done; |
| elessair | 0:f269e3021894 | 487 | } |
| elessair | 0:f269e3021894 | 488 | |
| elessair | 0:f269e3021894 | 489 | /* Get a reference ratio cycles/ms */ |
| elessair | 0:f269e3021894 | 490 | millisecs = 1; |
| elessair | 0:f269e3021894 | 491 | cycles = mbedtls_timing_hardclock(); |
| elessair | 0:f269e3021894 | 492 | busy_msleep( millisecs ); |
| elessair | 0:f269e3021894 | 493 | cycles = mbedtls_timing_hardclock() - cycles; |
| elessair | 0:f269e3021894 | 494 | ratio = cycles / millisecs; |
| elessair | 0:f269e3021894 | 495 | |
| elessair | 0:f269e3021894 | 496 | /* Check that the ratio is mostly constant */ |
| elessair | 0:f269e3021894 | 497 | for( millisecs = 2; millisecs <= 4; millisecs++ ) |
| elessair | 0:f269e3021894 | 498 | { |
| elessair | 0:f269e3021894 | 499 | cycles = mbedtls_timing_hardclock(); |
| elessair | 0:f269e3021894 | 500 | busy_msleep( millisecs ); |
| elessair | 0:f269e3021894 | 501 | cycles = mbedtls_timing_hardclock() - cycles; |
| elessair | 0:f269e3021894 | 502 | |
| elessair | 0:f269e3021894 | 503 | /* Allow variation up to 20% */ |
| elessair | 0:f269e3021894 | 504 | if( cycles / millisecs < ratio - ratio / 5 || |
| elessair | 0:f269e3021894 | 505 | cycles / millisecs > ratio + ratio / 5 ) |
| elessair | 0:f269e3021894 | 506 | { |
| elessair | 0:f269e3021894 | 507 | hardfail++; |
| elessair | 0:f269e3021894 | 508 | goto hard_test; |
| elessair | 0:f269e3021894 | 509 | } |
| elessair | 0:f269e3021894 | 510 | } |
| elessair | 0:f269e3021894 | 511 | |
| elessair | 0:f269e3021894 | 512 | if( verbose != 0 ) |
| elessair | 0:f269e3021894 | 513 | mbedtls_printf( "passed\n" ); |
| elessair | 0:f269e3021894 | 514 | |
| elessair | 0:f269e3021894 | 515 | hard_test_done: |
| elessair | 0:f269e3021894 | 516 | |
| elessair | 0:f269e3021894 | 517 | if( verbose != 0 ) |
| elessair | 0:f269e3021894 | 518 | mbedtls_printf( "\n" ); |
| elessair | 0:f269e3021894 | 519 | |
| elessair | 0:f269e3021894 | 520 | return( 0 ); |
| elessair | 0:f269e3021894 | 521 | } |
| elessair | 0:f269e3021894 | 522 | |
| elessair | 0:f269e3021894 | 523 | #endif /* MBEDTLS_SELF_TEST */ |
| elessair | 0:f269e3021894 | 524 | |
| elessair | 0:f269e3021894 | 525 | #endif /* MBEDTLS_TIMING_C */ |