14c56691c7
Version 0.2.7 of this library has been released on June 30th, and this
patch updates the library from version 0.2.6. A summary of changes
is available at the official repository at:
https://github.com/01org/tinycrypt/releases/tag/v0.2.7
There were some API changes in this version, so some tests are not
building: ccm_mode, ecc_dh, and ecc_dsa. Fixes to these tests and
subsystems affected by the changes will be provided.
Signed-off-by: Leandro Pereira <leandro.pereira@intel.com>
Signed-off-by: Anas Nashif <anas.nashif@intel.com>
106 lines
4.0 KiB
C
106 lines
4.0 KiB
C
/* uECC_platform_specific.c - Implementation of platform specific functions*/
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/* Copyright (c) 2014, Kenneth MacKay
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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* * Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.*/
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/*
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* Copyright (C) 2017 by Intel Corporation, All Rights Reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* - Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* - Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* - Neither the name of Intel Corporation nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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* uECC_platform_specific.c -- Implementation of platform specific functions
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*/
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#if defined(unix) || defined(__linux__) || defined(__unix__) || \
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defined(__unix) | (defined(__APPLE__) && defined(__MACH__)) || \
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defined(uECC_POSIX)
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/* Some POSIX-like system with /dev/urandom or /dev/random. */
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#include <sys/types.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <stdint.h>
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#ifndef O_CLOEXEC
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#define O_CLOEXEC 0
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#endif
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int default_CSPRNG(uint8_t *dest, unsigned int size) {
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/* input sanity check: */
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if (dest == (uint8_t *) 0 || (size <= 0))
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return 0;
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int fd = open("/dev/urandom", O_RDONLY | O_CLOEXEC);
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if (fd == -1) {
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fd = open("/dev/random", O_RDONLY | O_CLOEXEC);
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if (fd == -1) {
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return 0;
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}
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}
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char *ptr = (char *)dest;
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size_t left = (size_t) size;
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while (left > 0) {
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ssize_t bytes_read = read(fd, ptr, left);
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if (bytes_read <= 0) { // read failed
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close(fd);
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return 0;
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}
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left -= bytes_read;
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ptr += bytes_read;
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}
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close(fd);
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return 1;
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}
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#endif /* platform */
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