MacroRat / MouseCode

Mouse code for the MacroRat

Dependencies:   ITG3200 QEI

mbed-dev/targets/TARGET_NUVOTON/TARGET_NUC472/crypto/crypto-misc.c@18:6a4db94011d3, 2017-05-14 (annotated)

Committer:
sahilmgandhi
Date:
Sun May 14 23:18:57 2017 +0000
Revision:
18:6a4db94011d3
Publishing again

Who changed what in which revision?

UserRevisionLine numberNew contents of line
sahilmgandhi 18:6a4db94011d3 1 /* mbed Microcontroller Library
sahilmgandhi 18:6a4db94011d3 2 * Copyright (c) 2015-2016 Nuvoton
sahilmgandhi 18:6a4db94011d3 3 *
sahilmgandhi 18:6a4db94011d3 4 * Licensed under the Apache License, Version 2.0 (the "License");
sahilmgandhi 18:6a4db94011d3 5 * you may not use this file except in compliance with the License.
sahilmgandhi 18:6a4db94011d3 6 * You may obtain a copy of the License at
sahilmgandhi 18:6a4db94011d3 7 *
sahilmgandhi 18:6a4db94011d3 8 * http://www.apache.org/licenses/LICENSE-2.0
sahilmgandhi 18:6a4db94011d3 9 *
sahilmgandhi 18:6a4db94011d3 10 * Unless required by applicable law or agreed to in writing, software
sahilmgandhi 18:6a4db94011d3 11 * distributed under the License is distributed on an "AS IS" BASIS,
sahilmgandhi 18:6a4db94011d3 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
sahilmgandhi 18:6a4db94011d3 13 * See the License for the specific language governing permissions and
sahilmgandhi 18:6a4db94011d3 14 * limitations under the License.
sahilmgandhi 18:6a4db94011d3 15 */
sahilmgandhi 18:6a4db94011d3 16
sahilmgandhi 18:6a4db94011d3 17
sahilmgandhi 18:6a4db94011d3 18 #include "cmsis.h"
sahilmgandhi 18:6a4db94011d3 19 #include "mbed_assert.h"
sahilmgandhi 18:6a4db94011d3 20 #include "nu_modutil.h"
sahilmgandhi 18:6a4db94011d3 21 #include "nu_bitutil.h"
sahilmgandhi 18:6a4db94011d3 22 #include "crypto-misc.h"
sahilmgandhi 18:6a4db94011d3 23
sahilmgandhi 18:6a4db94011d3 24 static int crypto_inited = 0;
sahilmgandhi 18:6a4db94011d3 25 static int crypto_sha_avail = 1;
sahilmgandhi 18:6a4db94011d3 26
sahilmgandhi 18:6a4db94011d3 27 void crypto_init(void)
sahilmgandhi 18:6a4db94011d3 28 {
sahilmgandhi 18:6a4db94011d3 29 if (crypto_inited) {
sahilmgandhi 18:6a4db94011d3 30 return;
sahilmgandhi 18:6a4db94011d3 31 }
sahilmgandhi 18:6a4db94011d3 32 crypto_inited = 1;
sahilmgandhi 18:6a4db94011d3 33
sahilmgandhi 18:6a4db94011d3 34 CLK_EnableModuleClock(CRPT_MODULE);
sahilmgandhi 18:6a4db94011d3 35 }
sahilmgandhi 18:6a4db94011d3 36
sahilmgandhi 18:6a4db94011d3 37 /* Implementation that should never be optimized out by the compiler */
sahilmgandhi 18:6a4db94011d3 38 void crypto_zeroize(void *v, size_t n)
sahilmgandhi 18:6a4db94011d3 39 {
sahilmgandhi 18:6a4db94011d3 40 volatile unsigned char *p = (unsigned char*) v;
sahilmgandhi 18:6a4db94011d3 41 while (n--) {
sahilmgandhi 18:6a4db94011d3 42 *p++ = 0;
sahilmgandhi 18:6a4db94011d3 43 }
sahilmgandhi 18:6a4db94011d3 44 }
sahilmgandhi 18:6a4db94011d3 45
sahilmgandhi 18:6a4db94011d3 46 int crypto_sha_acquire(void)
sahilmgandhi 18:6a4db94011d3 47 {
sahilmgandhi 18:6a4db94011d3 48 if (crypto_sha_avail) {
sahilmgandhi 18:6a4db94011d3 49 crypto_sha_avail = 0;
sahilmgandhi 18:6a4db94011d3 50 return 1;
sahilmgandhi 18:6a4db94011d3 51 }
sahilmgandhi 18:6a4db94011d3 52 else {
sahilmgandhi 18:6a4db94011d3 53 return 0;
sahilmgandhi 18:6a4db94011d3 54 }
sahilmgandhi 18:6a4db94011d3 55
sahilmgandhi 18:6a4db94011d3 56 }
sahilmgandhi 18:6a4db94011d3 57
sahilmgandhi 18:6a4db94011d3 58 void crypto_sha_release(void)
sahilmgandhi 18:6a4db94011d3 59 {
sahilmgandhi 18:6a4db94011d3 60 if (! crypto_sha_avail) {
sahilmgandhi 18:6a4db94011d3 61 crypto_sha_avail = 1;
sahilmgandhi 18:6a4db94011d3 62 }
sahilmgandhi 18:6a4db94011d3 63 }