build: remove rng.cpp

src/Makefile.am

@@ -29,10 +29,6 @@ libopendht_la_SOURCES  = \
         network_utils.cpp \
         thread_pool.cpp
 
-if WIN32
-libopendht_la_SOURCES += rng.cpp
-endif
-
 nobase_include_HEADERS = \
         ../include/opendht.h \
         ../include/opendht/def.h \

src/rng.cpp

-/*
- *  Copyright (C) 2014-2023 Savoir-faire Linux Inc.
- *  Author : Adrien Béraud <adrien.beraud@savoirfairelinux.com>
- *
- *  This program is free software; you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation; either version 3 of the License, or
- *  (at your option) any later version.
- *
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *  GNU General Public License for more details.
- *
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
- */
-
-#include "rng.h"
-
-#include <chrono>
-#include <cstring>
-
-namespace dht {
-namespace crypto {
-
-random_device::random_device() :
-   gen(std::chrono::system_clock::now().time_since_epoch().count() ^ std::chrono::high_resolution_clock::now().count())
-{}
-
-random_device::result_type
-random_device::operator()()
-{
-    result_type prand = dis(gen);
-    result_type hwrand;
-    if (hasRdseed() and rdseed(&hwrand))
-        prand ^= hwrand;
-    else if (hasRdrand() and rdrand(&hwrand))
-        prand ^= hwrand;
-    return prand;
-}
-
-random_device::CPUIDinfo::CPUIDinfo(const unsigned int func, const unsigned int subfunc)
-{
-    __asm__ __volatile__ (
-        "cpuid"
-        : "=a"(EAX), "=b"(EBX), "=c"(ECX), "=d"(EDX)
-        : "a"(func), "c"(subfunc)
-    );
-}
-
-bool
-random_device::hasIntelCpu()
-{
-    CPUIDinfo info (0, 0);
-    return (memcmp((char *) (&info.EBX), "Genu", 4) == 0
-         && memcmp((char *) (&info.EDX), "ineI", 4) == 0
-         && memcmp((char *) (&info.ECX), "ntel", 4) == 0);
-}
-
-bool
-random_device::_hasRdrand()
-{
-    return hasIntelCpu() && (CPUIDinfo {1, 0}.ECX & (1 << 30));
-}
-
-bool
-random_device::_hasRdseed()
-{
-    return hasIntelCpu() && (CPUIDinfo {7, 0}.ECX & (1 << 18));
-}
-
-bool
-random_device::rdrandStep(result_type* r)
-{
-    unsigned char ok;
-    asm volatile ("rdrand %0; setc %1"
-        : "=r" (*r), "=qm" (ok));
-    return ok;
-}
-
-bool
-random_device::rdrand(result_type* r)
-{
-    result_type res;
-    unsigned retries = 8;
-    while (retries--)
-        if (rdrandStep(&res)) {
-            *r = res;
-            return true;
-        }
-    return false;
-}
-
-bool
-random_device::rdseedStep(result_type* r)
-{
-    unsigned char ok;
-    asm volatile ("rdseed %0; setc %1"
-        : "=r" (*r), "=qm" (ok));
-    return ok;
-}
-
-bool
-random_device::rdseed(result_type* r)
-{
-    result_type res;
-    unsigned retries = 256;
-    while (retries--)
-        if (rdseedStep(&res)) {
-            *r = res;
-            return true;
-        }
-    return false;
-}
-
-}}