mbed library sources. Supersedes mbed-src.
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targets/TARGET_NUVOTON/TARGET_NUC472/crypto/crypto-misc.c@152:9a67f0b066fc, 2016-12-15 (annotated)
- Committer:
- <>
- Date:
- Thu Dec 15 11:48:27 2016 +0000
- Revision:
- 152:9a67f0b066fc
- Parent:
- 149:156823d33999
This updates the lib to the mbed lib v131
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
<> | 149:156823d33999 | 1 | /* mbed Microcontroller Library |
<> | 149:156823d33999 | 2 | * Copyright (c) 2015-2016 Nuvoton |
<> | 149:156823d33999 | 3 | * |
<> | 149:156823d33999 | 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
<> | 149:156823d33999 | 5 | * you may not use this file except in compliance with the License. |
<> | 149:156823d33999 | 6 | * You may obtain a copy of the License at |
<> | 149:156823d33999 | 7 | * |
<> | 149:156823d33999 | 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
<> | 149:156823d33999 | 9 | * |
<> | 149:156823d33999 | 10 | * Unless required by applicable law or agreed to in writing, software |
<> | 149:156823d33999 | 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
<> | 149:156823d33999 | 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
<> | 149:156823d33999 | 13 | * See the License for the specific language governing permissions and |
<> | 149:156823d33999 | 14 | * limitations under the License. |
<> | 149:156823d33999 | 15 | */ |
<> | 149:156823d33999 | 16 | |
<> | 149:156823d33999 | 17 | |
<> | 149:156823d33999 | 18 | #include "cmsis.h" |
<> | 149:156823d33999 | 19 | #include "mbed_assert.h" |
<> | 149:156823d33999 | 20 | #include "nu_modutil.h" |
<> | 149:156823d33999 | 21 | #include "nu_bitutil.h" |
<> | 149:156823d33999 | 22 | #include "crypto-misc.h" |
<> | 149:156823d33999 | 23 | |
<> | 149:156823d33999 | 24 | static int crypto_inited = 0; |
<> | 149:156823d33999 | 25 | static int crypto_sha_avail = 1; |
<> | 149:156823d33999 | 26 | |
<> | 149:156823d33999 | 27 | void crypto_init(void) |
<> | 149:156823d33999 | 28 | { |
<> | 149:156823d33999 | 29 | if (crypto_inited) { |
<> | 149:156823d33999 | 30 | return; |
<> | 149:156823d33999 | 31 | } |
<> | 149:156823d33999 | 32 | crypto_inited = 1; |
<> | 149:156823d33999 | 33 | |
<> | 149:156823d33999 | 34 | CLK_EnableModuleClock(CRPT_MODULE); |
<> | 149:156823d33999 | 35 | } |
<> | 149:156823d33999 | 36 | |
<> | 149:156823d33999 | 37 | /* Implementation that should never be optimized out by the compiler */ |
<> | 149:156823d33999 | 38 | void crypto_zeroize(void *v, size_t n) |
<> | 149:156823d33999 | 39 | { |
<> | 149:156823d33999 | 40 | volatile unsigned char *p = (unsigned char*) v; |
<> | 149:156823d33999 | 41 | while (n--) { |
<> | 149:156823d33999 | 42 | *p++ = 0; |
<> | 149:156823d33999 | 43 | } |
<> | 149:156823d33999 | 44 | } |
<> | 149:156823d33999 | 45 | |
<> | 149:156823d33999 | 46 | int crypto_sha_acquire(void) |
<> | 149:156823d33999 | 47 | { |
<> | 149:156823d33999 | 48 | if (crypto_sha_avail) { |
<> | 149:156823d33999 | 49 | crypto_sha_avail = 0; |
<> | 149:156823d33999 | 50 | return 1; |
<> | 149:156823d33999 | 51 | } |
<> | 149:156823d33999 | 52 | else { |
<> | 149:156823d33999 | 53 | return 0; |
<> | 149:156823d33999 | 54 | } |
<> | 149:156823d33999 | 55 | |
<> | 149:156823d33999 | 56 | } |
<> | 149:156823d33999 | 57 | |
<> | 149:156823d33999 | 58 | void crypto_sha_release(void) |
<> | 149:156823d33999 | 59 | { |
<> | 149:156823d33999 | 60 | if (! crypto_sha_avail) { |
<> | 149:156823d33999 | 61 | crypto_sha_avail = 1; |
<> | 149:156823d33999 | 62 | } |
<> | 149:156823d33999 | 63 | } |