mbed library sources. Supersedes mbed-src.
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Diff: targets/TARGET_NUVOTON/TARGET_NUC472/crypto/crypto-misc.c
- Revision:
- 153:9398a535854b
- Parent:
- 152:9a67f0b066fc
diff -r 9a67f0b066fc -r 9398a535854b targets/TARGET_NUVOTON/TARGET_NUC472/crypto/crypto-misc.c --- a/targets/TARGET_NUVOTON/TARGET_NUC472/crypto/crypto-misc.c Thu Dec 15 11:48:27 2016 +0000 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,63 +0,0 @@ -/* mbed Microcontroller Library - * Copyright (c) 2015-2016 Nuvoton - * - * Licensed under the Apache License, Version 2.0 (the "License"); - * you may not use this file except in compliance with the License. - * You may obtain a copy of the License at - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - */ - - -#include "cmsis.h" -#include "mbed_assert.h" -#include "nu_modutil.h" -#include "nu_bitutil.h" -#include "crypto-misc.h" - -static int crypto_inited = 0; -static int crypto_sha_avail = 1; - -void crypto_init(void) -{ - if (crypto_inited) { - return; - } - crypto_inited = 1; - - CLK_EnableModuleClock(CRPT_MODULE); -} - -/* Implementation that should never be optimized out by the compiler */ -void crypto_zeroize(void *v, size_t n) -{ - volatile unsigned char *p = (unsigned char*) v; - while (n--) { - *p++ = 0; - } -} - -int crypto_sha_acquire(void) -{ - if (crypto_sha_avail) { - crypto_sha_avail = 0; - return 1; - } - else { - return 0; - } - -} - -void crypto_sha_release(void) -{ - if (! crypto_sha_avail) { - crypto_sha_avail = 1; - } -}