mirror of https://github.com/ARMmbed/mbed-os.git
46 lines
1.3 KiB
C
46 lines
1.3 KiB
C
/*
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* Copyright (c) 2015 ARM Limited. All rights reserved.
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* SPDX-License-Identifier: Apache-2.0
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* Licensed under the Apache License, Version 2.0 (the License); you may
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* not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an AS IS BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "ns_types.h"
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#include "arm_hal_random.h"
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#ifdef MBED_CONF_NANOSTACK_CONFIGURATION
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#include "driverRFPhy.h"
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#endif
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#include "mbedtls/entropy_poll.h"
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void arm_random_module_init(void)
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{
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}
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uint32_t arm_random_seed_get(void)
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{
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uint32_t result = 0;
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#ifdef MBEDTLS_ENTROPY_HARDWARE_ALT
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/* Grab a seed from a function we provide for mbedtls */
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size_t len;
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mbedtls_hardware_poll(NULL, (uint8_t *) &result, sizeof result, &len);
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#endif
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#ifdef MBED_CONF_NANOSTACK_CONFIGURATION
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uint8_t mac[8];
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rf_read_mac_address(mac);
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for (int i = 0; i <= 7; i++) {
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result ^= (uint32_t) mac[i] << ((i % 4) * 8);
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}
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result ^= rf_read_random();
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#endif
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return result;
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}
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