f1c877f205
This streamlines the Genode-specific interface for both 32-bit and 64-bit architectures and fixes dynamic-linking issue with the rump VFS due to differing size_t types.
64 lines
1.1 KiB
C++
64 lines
1.1 KiB
C++
/**
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* \brief Add random support for CGD
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* \author Sebastian Sumpf
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* \date 2015-02-13
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*/
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/*
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* Copyright (C) 2015 Genode Labs GmbH
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*
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* This file is part of the Genode OS framework, which is distributed
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* under the terms of the GNU General Public License version 2.
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*/
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#include <base/log.h>
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#include <util/random.h>
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extern "C" {
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namespace Jitter {
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#include <jitterentropy.h>
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}
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}
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typedef Genode::size_t size_t;
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/***********************************
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** Jitter entropy for randomness **
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***********************************/
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struct Entropy
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{
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struct Jitter::rand_data *ec_stir;
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Entropy()
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{
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Jitter::jent_entropy_init();
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ec_stir = Jitter::jent_entropy_collector_alloc(0, 0);
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}
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static Entropy *e()
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{
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static Entropy _e;
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return &_e;
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}
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size_t read(char *buf, size_t len)
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{
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int err;
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if ((err = Jitter::jent_read_entropy(ec_stir, buf, len) < 0)) {
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Genode::error("failed to read entropy: ", err);
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return 0;
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}
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return len;
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}
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};
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int rumpuser_getrandom_backend(void *buf, size_t buflen, int flags, Genode::size_t *retp)
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{
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*retp = Entropy::e()->read((char *)buf, buflen);
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return 0;
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}
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