Diff: targets/TARGET_NUVOTON/TARGET_NUC472/trng_api.c

Revision:

153:9398a535854b

Parent:

152:9a67f0b066fc

--- a/targets/TARGET_NUVOTON/TARGET_NUC472/trng_api.c	Thu Dec 15 11:48:27 2016 +0000
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,100 +0,0 @@
-/*
- *  Hardware entropy collector for NUC472's RNGA
- *
- *  Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
- *  SPDX-License-Identifier: Apache-2.0
- *
- *  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.
- *
- */
-
-#if DEVICE_TRNG
-
-#include <stdlib.h>
-#include <string.h>
-#include "cmsis.h"
-#include "NUC472_442.h"
-#include "us_ticker_api.h"
-#include "trng_api.h"
-
-/*
- * Get Random number generator.
- */
-static volatile int  g_PRNG_done;
-
-void CRYPTO_IRQHandler()
-{
-    if (PRNG_GET_INT_FLAG()) {
-        g_PRNG_done = 1;
-        PRNG_CLR_INT_FLAG();
-    }
-} 
-
-static void trng_get(unsigned char *pConversionData)
-{
-    uint32_t *p32ConversionData;
-
-    p32ConversionData = (uint32_t *)pConversionData;
-
-    PRNG_Open(PRNG_KEY_SIZE_256, 1, us_ticker_read());
-    PRNG_Start();
-    while (!g_PRNG_done);
-
-    PRNG_Read(p32ConversionData);
-}
-
-void trng_init(trng_t *obj)
-{
-    (void)obj;
-    /* Unlock protected registers */
-    SYS_UnlockReg();    
-    /* Enable IP clock */
-    CLK_EnableModuleClock(CRPT_MODULE);
-    
-    /* Lock protected registers */
-    SYS_LockReg();
-    
-    NVIC_EnableIRQ(CRPT_IRQn);
-    PRNG_ENABLE_INT();
-}
-
-void trng_free(trng_t *obj)
-{
-    (void)obj;
-    PRNG_DISABLE_INT();
-    NVIC_DisableIRQ(CRPT_IRQn);
-}
-
-int trng_get_bytes(trng_t *obj, uint8_t *output, size_t length, size_t *output_length)
-{
-    (void)obj;
-
-    *output_length = 0;
-    if (length < 32) {
-        unsigned char tmpBuff[32];
-        trng_get(tmpBuff);
-        memcpy(output, &tmpBuff, length);
-        *output_length = length;
-    } else {
-        for (int i = 0; i < (length/32); i++) {
-            trng_get(output);
-            *output_length += 32;
-            output += 32;
-        }
-    }
-
-    return 0;
-}
- 
-#endif
-