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https://github.com/omar-polo/gmid.git
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f9ab77a898
gmid (like all other daemons that want to do privsep crypto) has a very close relationship with libtls and need to stay in sync with it. OpenBSD' libtls was recently changed to use OpenSSL' EC_KEY_METHOD instead of the older ECDSA_METHOD, on the gmid side we have to do the same otherwise failures happens at runtime. In a similar manner, privsep crypto is silently broken in the current libretls (next version should fix it.) The proper solution would be to complete the signer APIs so that applications don't need to dive into the library' internals, but that's a mid-term goal, for the immediate bundling the 'little' libtls is the lesser evil. The configure script has gained a new (undocumented for the time being) flag `--with-libtls=bundled|system' to control which libtls to use. It defaults to `bundled' except for OpenBSD where it uses the `system' one. Note that OpenBSD versions before 7.3 (inclusive) ought to use --with-libtls=bundled too since they still do ECDSA_METHOD.
90 lines
2.3 KiB
C
90 lines
2.3 KiB
C
/* $OpenBSD: arc4random_linux.h,v 1.12 2019/07/11 10:37:28 inoguchi Exp $ */
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/*
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* Copyright (c) 1996, David Mazieres <dm@uun.org>
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* Copyright (c) 2008, Damien Miller <djm@openbsd.org>
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* Copyright (c) 2013, Markus Friedl <markus@openbsd.org>
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* Copyright (c) 2014, Theo de Raadt <deraadt@openbsd.org>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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/*
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* Stub functions for portability. From LibreSSL with some adaptations.
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*/
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#include <sys/mman.h>
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#include <signal.h>
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/* OpenSSH isn't multithreaded */
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#define _ARC4_LOCK()
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#define _ARC4_UNLOCK()
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#define _ARC4_ATFORK(f)
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static inline void
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_getentropy_fail(void)
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{
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fatal("getentropy failed");
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}
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static volatile sig_atomic_t _rs_forked;
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static inline void
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_rs_forkhandler(void)
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{
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_rs_forked = 1;
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}
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static inline void
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_rs_forkdetect(void)
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{
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static pid_t _rs_pid = 0;
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pid_t pid = getpid();
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if (_rs_pid == 0 || _rs_pid == 1 || _rs_pid != pid || _rs_forked) {
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_rs_pid = pid;
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_rs_forked = 0;
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if (rs)
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memset(rs, 0, sizeof(*rs));
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}
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}
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static inline int
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_rs_allocate(struct _rs **rsp, struct _rsx **rsxp)
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{
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#if defined(MAP_ANON) && defined(MAP_PRIVATE)
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if ((*rsp = mmap(NULL, sizeof(**rsp), PROT_READ|PROT_WRITE,
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MAP_ANON|MAP_PRIVATE, -1, 0)) == MAP_FAILED)
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return (-1);
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if ((*rsxp = mmap(NULL, sizeof(**rsxp), PROT_READ|PROT_WRITE,
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MAP_ANON|MAP_PRIVATE, -1, 0)) == MAP_FAILED) {
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munmap(*rsp, sizeof(**rsp));
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*rsp = NULL;
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return (-1);
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}
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#else
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if ((*rsp = calloc(1, sizeof(**rsp))) == NULL)
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return (-1);
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if ((*rsxp = calloc(1, sizeof(**rsxp))) == NULL) {
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free(*rsp);
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*rsp = NULL;
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return (-1);
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}
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#endif
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_ARC4_ATFORK(_rs_forkhandler);
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return (0);
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}
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