77 lines
2.7 KiB
C++
77 lines
2.7 KiB
C++
/*
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* Copyright (c) 2022 Tomoyuki Sakurai <y@trombik.org>
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* Copyright (c) 2023-2024 Simone Rossetto <simros85@gmail.com>
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* Copyright (c) 2025 Stephan Hadinger
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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*
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* 1. 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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* 2. 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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* 3. Neither the name of the copyright holder 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 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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#include "wireguard-platform.h"
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#include "lwip/sys.h"
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#include "crypto.h"
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#define ENTROPY_MINIMUM_REQUIRED_THRESHOLD (134)
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#define ENTROPY_FUNCTION_DATA NULL
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#define ENTROPY_CUSTOM_DATA NULL
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#define ENTROPY_CUSTOM_DATA_LENGTH (0)
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extern "C" uint32_t phy_get_rand(void); // From the ESP8266 SDK
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void wireguard_random_bytes(void *bytes, size_t size) {
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#ifdef ESP32
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esp_fill_random(bytes, size);
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#elif defined(ESP8266)
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for (int32_t i=0; i<size; i++) {
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*((uint8_t*)bytes + i) = phy_get_rand();
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}
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#endif
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}
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uint32_t wireguard_sys_now() {
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// Default to the LwIP system time
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return sys_now();
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}
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void wireguard_tai64n_now(uint8_t *output) {
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// See https://cr.yp.to/libtai/tai64.html
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// 64 bit seconds from 1970 = 8 bytes
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// 32 bit nano seconds from current second
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struct timeval tv;
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gettimeofday(&tv, NULL);
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uint64_t seconds = 0x400000000000000aULL + tv.tv_sec;
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uint32_t nanos = tv.tv_usec * 1000;
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U64TO8_BIG(output + 0, seconds);
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U32TO8_BIG(output + 8, nanos);
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}
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bool wireguard_is_under_load() { // actually not called, we have inlined the fact that it's always false
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return false;
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}
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