95 lines
2.6 KiB
C
95 lines
2.6 KiB
C
/****************************************************************************
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* apps/crypto/mbedtls/source/entropy_alt.c
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. 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. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <fcntl.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <unistd.h>
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#include <psa/crypto.h>
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#include <psa/crypto_platform.h>
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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#ifdef CONFIG_MBEDTLS_ENTROPY_HARDWARE_ALT
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int mbedtls_hardware_poll(FAR void *data,
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FAR unsigned char *output,
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size_t len,
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FAR size_t *olen)
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{
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int fd;
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size_t read_len;
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*olen = 0;
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fd = open("/dev/random", O_RDONLY, 0);
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if (fd < 0)
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{
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return -errno;
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}
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read_len = read(fd, output, len);
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if (read_len != len)
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{
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close(fd);
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return -errno;
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}
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close(fd);
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*olen = len;
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return 0;
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}
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#endif /* CONFIG_MBEDTLS_ENTROPY_HARDWARE_ALT */
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#ifdef CONFIG_MBEDTLS_PSA_CRYPTO_EXTERNAL_RNG
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psa_status_t mbedtls_psa_external_get_random(
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FAR mbedtls_psa_external_random_context_t *context,
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FAR uint8_t *output, size_t output_size, FAR size_t *output_length)
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{
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int fd;
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size_t read_len;
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*output_length = 0;
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(void)context;
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fd = open("/dev/random", O_RDONLY, 0);
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if (fd < 0)
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{
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return -errno;
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}
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read_len = read(fd, output, output_size);
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if (read_len != output_size)
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{
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close(fd);
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return -errno;
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}
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close(fd);
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*output_length = read_len;
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return 0;
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}
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#endif /* CONFIG_MBEDTLS_PSA_CRYPTO_EXTERNAL_RNG */
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