/*
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* Copyright (c) 2022 Rockchip Electronics Co. Ltd.
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*/
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#include <fcntl.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include "rkcrypto_random.h"
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#include "rkcrypto_trace.h"
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#ifdef ANDROID
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#define HWRNG_NODE "/dev/hw_random"
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#else
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#define HWRNG_NODE "/dev/hwrng"
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#endif
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RK_RES rk_get_random(uint8_t *data, uint32_t len)
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{
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RK_RES res = RK_CRYPTO_SUCCESS;
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int hwrng_fd = -1;
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int read_len = 0;
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hwrng_fd = open(HWRNG_NODE, O_RDONLY, 0);
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if (hwrng_fd < 0) {
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E_TRACE("open %s error!", HWRNG_NODE);
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return RK_CRYPTO_ERR_GENERIC;
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}
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read_len = read(hwrng_fd, data, len);
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if (read_len != len) {
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E_TRACE("read %s error!", HWRNG_NODE);
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res = RK_CRYPTO_ERR_GENERIC;
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}
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close(hwrng_fd);
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return res;
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}
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