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openntpd-openbsd
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This commit was manufactured by cvs2git to create branch 'OPENBSD_5_6'. 

Sprout from master 2014-08-06 20:29:54 UTC reyk 'Change grammar to remove a shift/reduce conflict that was introduced'
Delete:
src/lib/libcrypto/arc4random/arc4random_linux.h
src/lib/libcrypto/arc4random/arc4random_osx.h
src/lib/libcrypto/arc4random/arc4random_solaris.h
src/lib/libcrypto/arc4random/arc4random_win.h
src/lib/libcrypto/arc4random/getentropy_linux.c
src/lib/libcrypto/arc4random/getentropy_osx.c
src/lib/libcrypto/arc4random/getentropy_solaris.c
src/lib/libcrypto/arc4random/getentropy_win.c
OPENBSD_5_6
cvs2svn 10 years ago
parent
546aea474c
commit
959f35e6b6
8 changed files with 0 additions and 1794 deletions
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  1. +0
    -85
      src/lib/libcrypto/arc4random/arc4random_linux.h
  2. +0
    -79
      src/lib/libcrypto/arc4random/arc4random_osx.h
  3. +0
    -79
      src/lib/libcrypto/arc4random/arc4random_solaris.h
  4. +0
    -74
      src/lib/libcrypto/arc4random/arc4random_win.h
  5. +0
    -544
      src/lib/libcrypto/arc4random/getentropy_linux.c
  6. +0
    -429
      src/lib/libcrypto/arc4random/getentropy_osx.c
  7. +0
    -445
      src/lib/libcrypto/arc4random/getentropy_solaris.c
  8. +0
    -59
      src/lib/libcrypto/arc4random/getentropy_win.c

+ 0
- 85
src/lib/libcrypto/arc4random/arc4random_linux.h View File

@ -1,85 +0,0 @@
/* $OpenBSD: arc4random_linux.h,v 1.7 2014/07/20 20:51:13 bcook Exp $ */
/*
* Copyright (c) 1996, David Mazieres <dm@uun.org>
* Copyright (c) 2008, Damien Miller <djm@openbsd.org>
* Copyright (c) 2013, Markus Friedl <markus@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/*
* Stub functions for portability.
*/
#include <sys/mman.h>
#include <pthread.h>
#include <signal.h>
static pthread_mutex_t arc4random_mtx = PTHREAD_MUTEX_INITIALIZER;
#define _ARC4_LOCK() pthread_mutex_lock(&arc4random_mtx)
#define _ARC4_UNLOCK() pthread_mutex_unlock(&arc4random_mtx)
#ifdef __GLIBC__
extern void *__dso_handle;
extern int __register_atfork(void (*)(void), void(*)(void), void (*)(void), void *);
#define _ARC4_ATFORK(f) __register_atfork(NULL, NULL, (f), __dso_handle)
#else
#define _ARC4_ATFORK(f) pthread_atfork(NULL, NULL, (f))
#endif
static inline void
_getentropy_fail(void)
{
raise(SIGKILL);
}
static volatile sig_atomic_t _rs_forked;
static inline void
_rs_forkhandler(void)
{
_rs_forked = 1;
}
static inline void
_rs_forkdetect(void)
{
static pid_t _rs_pid = 0;
pid_t pid = getpid();
if (_rs_pid == 0 || _rs_pid != pid || _rs_forked) {
_rs_pid = pid;
_rs_forked = 0;
if (rs)
memset(rs, 0, sizeof(*rs));
}
}
static inline int
_rs_allocate(struct _rs **rsp, struct _rsx **rsxp)
{
if ((*rsp = mmap(NULL, sizeof(**rsp), PROT_READ|PROT_WRITE,
MAP_ANON|MAP_PRIVATE, -1, 0)) == MAP_FAILED)
return (-1);
if ((*rsxp = mmap(NULL, sizeof(**rsxp), PROT_READ|PROT_WRITE,
MAP_ANON|MAP_PRIVATE, -1, 0)) == MAP_FAILED) {
munmap(*rsxp, sizeof(**rsxp));
return (-1);
}
_ARC4_ATFORK(_rs_forkhandler);
return (0);
}

+ 0
- 79
src/lib/libcrypto/arc4random/arc4random_osx.h View File

@ -1,79 +0,0 @@
/* $OpenBSD: arc4random_osx.h,v 1.7 2014/07/20 20:51:13 bcook Exp $ */
/*
* Copyright (c) 1996, David Mazieres <dm@uun.org>
* Copyright (c) 2008, Damien Miller <djm@openbsd.org>
* Copyright (c) 2013, Markus Friedl <markus@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/*
* Stub functions for portability.
*/
#include <sys/mman.h>
#include <pthread.h>
#include <signal.h>
static pthread_mutex_t arc4random_mtx = PTHREAD_MUTEX_INITIALIZER;
#define _ARC4_LOCK() pthread_mutex_lock(&arc4random_mtx)
#define _ARC4_UNLOCK() pthread_mutex_unlock(&arc4random_mtx)
#define _ARC4_ATFORK(f) pthread_atfork(NULL, NULL, (f))
static inline void
_getentropy_fail(void)
{
raise(SIGKILL);
}
static volatile sig_atomic_t _rs_forked;
static inline void
_rs_forkhandler(void)
{
_rs_forked = 1;
}
static inline void
_rs_forkdetect(void)
{
static pid_t _rs_pid = 0;
pid_t pid = getpid();
if (_rs_pid == 0 || _rs_pid != pid || _rs_forked) {
_rs_pid = pid;
_rs_forked = 0;
if (rs)
memset(rs, 0, sizeof(*rs));
}
}
static inline int
_rs_allocate(struct _rs **rsp, struct _rsx **rsxp)
{
if ((*rsp = mmap(NULL, sizeof(**rsp), PROT_READ|PROT_WRITE,
MAP_ANON|MAP_PRIVATE, -1, 0)) == MAP_FAILED)
return -1;
if ((*rsxp = mmap(NULL, sizeof(**rsxp), PROT_READ|PROT_WRITE,
MAP_ANON|MAP_PRIVATE, -1, 0)) == MAP_FAILED) {
munmap(*rsxp, sizeof(**rsxp));
return -1;
}
_ARC4_ATFORK(_rs_forkhandler);
return 0;
}

+ 0
- 79
src/lib/libcrypto/arc4random/arc4random_solaris.h View File

@ -1,79 +0,0 @@
/* $OpenBSD: arc4random_solaris.h,v 1.7 2014/07/20 20:51:13 bcook Exp $ */
/*
* Copyright (c) 1996, David Mazieres <dm@uun.org>
* Copyright (c) 2008, Damien Miller <djm@openbsd.org>
* Copyright (c) 2013, Markus Friedl <markus@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/*
* Stub functions for portability.
*/
#include <sys/mman.h>
#include <pthread.h>
#include <signal.h>
static pthread_mutex_t arc4random_mtx = PTHREAD_MUTEX_INITIALIZER;
#define _ARC4_LOCK() pthread_mutex_lock(&arc4random_mtx)
#define _ARC4_UNLOCK() pthread_mutex_unlock(&arc4random_mtx)
#define _ARC4_ATFORK(f) pthread_atfork(NULL, NULL, (f))
static inline void
_getentropy_fail(void)
{
raise(SIGKILL);
}
static volatile sig_atomic_t _rs_forked;
static inline void
_rs_forkhandler(void)
{
_rs_forked = 1;
}
static inline void
_rs_forkdetect(void)
{
static pid_t _rs_pid = 0;
pid_t pid = getpid();
if (_rs_pid == 0 || _rs_pid != pid || _rs_forked) {
_rs_pid = pid;
_rs_forked = 0;
if (rs)
memset(rs, 0, sizeof(*rs));
}
}
static inline int
_rs_allocate(struct _rs **rsp, struct _rsx **rsxp)
{
if ((*rsp = mmap(NULL, sizeof(**rsp), PROT_READ|PROT_WRITE,
MAP_ANON|MAP_PRIVATE, -1, 0)) == MAP_FAILED)
return (-1);
if ((*rsxp = mmap(NULL, sizeof(**rsxp), PROT_READ|PROT_WRITE,
MAP_ANON|MAP_PRIVATE, -1, 0)) == MAP_FAILED) {
munmap(*rsxp, sizeof(**rsxp));
return (-1);
}
_ARC4_ATFORK(_rs_forkhandler);
return (0);
}

+ 0
- 74
src/lib/libcrypto/arc4random/arc4random_win.h View File

@ -1,74 +0,0 @@
/* $OpenBSD: arc4random_win.h,v 1.4 2014/07/20 20:51:13 bcook Exp $ */
/*
* Copyright (c) 1996, David Mazieres <dm@uun.org>
* Copyright (c) 2008, Damien Miller <djm@openbsd.org>
* Copyright (c) 2013, Markus Friedl <markus@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/*
* Stub functions for portability.
*/
#include <windows.h>
static volatile HANDLE arc4random_mtx = NULL;
/*
* Initialize the mutex on the first lock attempt. On collision, each thread
* will attempt to allocate a mutex and compare-and-swap it into place as the
* global mutex. On failure to swap in the global mutex, the mutex is closed.
*/
#define _ARC4_LOCK() { \
if (!arc4random_mtx) { \
HANDLE p = CreateMutex(NULL, FALSE, NULL); \
if (InterlockedCompareExchangePointer((void **)&arc4random_mtx, (void *)p, NULL)) \
CloseHandle(p); \
} \
WaitForSingleObject(arc4random_mtx, INFINITE); \
} \
#define _ARC4_UNLOCK() ReleaseMutex(arc4random_mtx)
static inline void
_getentropy_fail(void)
{
TerminateProcess(GetCurrentProcess(), 0);
}
static inline int
_rs_allocate(struct _rs **rsp, struct _rsx **rsxp)
{
*rsp = calloc(1, sizeof(**rsp));
if (*rsp == NULL)
return (-1);
*rsxp = calloc(1, sizeof(**rsxp));
if (*rsxp == NULL) {
free(*rsp);
return (-1);
}
return (0);
}
static inline void
_rs_forkhandler(void)
{
}
static inline void
_rs_forkdetect(void)
{
}

+ 0
- 544
src/lib/libcrypto/arc4random/getentropy_linux.c View File

@ -1,544 +0,0 @@
/* $OpenBSD: getentropy_linux.c,v 1.32 2014/07/22 01:15:58 bcook Exp $ */
/*
* Copyright (c) 2014 Theo de Raadt <deraadt@openbsd.org>
* Copyright (c) 2014 Bob Beck <beck@obtuse.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
* Emulation of getentropy(2) as documented at:
* http://www.openbsd.org/cgi-bin/man.cgi/OpenBSD-current/man2/getentropy.2
*/
#define _POSIX_C_SOURCE 199309L
#define _GNU_SOURCE 1
#include <sys/types.h>
#include <sys/param.h>
#include <sys/ioctl.h>
#include <sys/resource.h>
#include <sys/syscall.h>
#ifdef HAVE_SYS_SYSCTL_H
#include <sys/sysctl.h>
#endif
#include <sys/statvfs.h>
#include <sys/socket.h>
#include <sys/mount.h>
#include <sys/mman.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <stdlib.h>
#include <stdint.h>
#include <stdio.h>
#include <link.h>
#include <termios.h>
#include <fcntl.h>
#include <signal.h>
#include <string.h>
#include <errno.h>
#include <unistd.h>
#include <time.h>
#include <openssl/sha.h>
#include <linux/random.h>
#include <linux/sysctl.h>
#ifdef HAVE_GETAUXVAL
#include <sys/auxv.h>
#endif
#include <sys/vfs.h>
#define REPEAT 5
#define min(a, b) (((a) < (b)) ? (a) : (b))
#define HX(a, b) \
do { \
if ((a)) \
HD(errno); \
else \
HD(b); \
} while (0)
#define HR(x, l) (SHA512_Update(&ctx, (char *)(x), (l)))
#define HD(x) (SHA512_Update(&ctx, (char *)&(x), sizeof (x)))
#define HF(x) (SHA512_Update(&ctx, (char *)&(x), sizeof (void*)))
int getentropy(void *buf, size_t len);
static int gotdata(char *buf, size_t len);
static int getentropy_getrandom(void *buf, size_t len);
static int getentropy_urandom(void *buf, size_t len);
#ifdef SYS__sysctl
static int getentropy_sysctl(void *buf, size_t len);
#endif
static int getentropy_fallback(void *buf, size_t len);
static int getentropy_phdr(struct dl_phdr_info *info, size_t size, void *data);
int
getentropy(void *buf, size_t len)
{
int ret = -1;
if (len > 256) {
errno = EIO;
return -1;
}
/*
* Try descriptor-less getrandom()
*/
ret = getentropy_getrandom(buf, len);
if (ret != -1)
return (ret);
/*
* Try to get entropy with /dev/urandom
*
* This can fail if the process is inside a chroot or if file
* descriptors are exhausted.
*/
ret = getentropy_urandom(buf, len);
if (ret != -1)
return (ret);
#ifdef SYS__sysctl
/*
* Try to use sysctl CTL_KERN, KERN_RANDOM, RANDOM_UUID.
* sysctl is a failsafe API, so it guarantees a result. This
* should work inside a chroot, or when file descriptors are
* exhuasted.
*
* However this can fail if the Linux kernel removes support
* for sysctl. Starting in 2007, there have been efforts to
* deprecate the sysctl API/ABI, and push callers towards use
* of the chroot-unavailable fd-using /proc mechanism --
* essentially the same problems as /dev/urandom.
*
* Numerous setbacks have been encountered in their deprecation
* schedule, so as of June 2014 the kernel ABI still exists on
* most Linux architectures. The sysctl() stub in libc is missing
* on some systems. There are also reports that some kernels
* spew messages to the console.
*/
ret = getentropy_sysctl(buf, len);
if (ret != -1)
return (ret);
#endif /* SYS__sysctl */
/*
* Entropy collection via /dev/urandom and sysctl have failed.
*
* No other API exists for collecting entropy. See the large
* comment block above.
*
* We have very few options:
* - Even syslog_r is unsafe to call at this low level, so
* there is no way to alert the user or program.
* - Cannot call abort() because some systems have unsafe
* corefiles.
* - Could raise(SIGKILL) resulting in silent program termination.
* - Return EIO, to hint that arc4random's stir function
* should raise(SIGKILL)
* - Do the best under the circumstances....
*
* This code path exists to bring light to the issue that Linux
* does not provide a failsafe API for entropy collection.
*
* We hope this demonstrates that Linux should either retain their
* sysctl ABI, or consider providing a new failsafe API which
* works in a chroot or when file descriptors are exhausted.
*/
#undef FAIL_INSTEAD_OF_TRYING_FALLBACK
#ifdef FAIL_INSTEAD_OF_TRYING_FALLBACK
raise(SIGKILL);
#endif
ret = getentropy_fallback(buf, len);
if (ret != -1)
return (ret);
errno = EIO;
return (ret);
}
/*
* Basic sanity checking; wish we could do better.
*/
static int
gotdata(char *buf, size_t len)
{
char any_set = 0;
size_t i;
for (i = 0; i < len; ++i)
any_set |= buf[i];
if (any_set == 0)
return -1;
return 0;
}
static int
getentropy_getrandom(void *buf, size_t len)
{
#if 0
/* Hand-definitions until the API becomes commonplace */
#ifndef SYS__getrandom
#ifdef __LP64__
#define SYS__getrandom 317
#else
#define SYS__getrandom 354
#endif
#endif
if (len > 256)
return (-1);
ret = syscall(SYS__getrandom, buf, len, 0);
if (ret == len)
return (0);
#endif
return -1;
}
static int
getentropy_urandom(void *buf, size_t len)
{
struct stat st;
size_t i;
int fd, cnt, flags;
int save_errno = errno;
start:
flags = O_RDONLY;
#ifdef O_NOFOLLOW
flags |= O_NOFOLLOW;
#endif
#ifdef O_CLOEXEC
flags |= O_CLOEXEC;
#endif
fd = open("/dev/urandom", flags, 0);
if (fd == -1) {
if (errno == EINTR)
goto start;
goto nodevrandom;
}
#ifndef O_CLOEXEC
fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC);
#endif
/* Lightly verify that the device node looks sane */
if (fstat(fd, &st) == -1 || !S_ISCHR(st.st_mode)) {
close(fd);
goto nodevrandom;
}
if (ioctl(fd, RNDGETENTCNT, &cnt) == -1) {
close(fd);
goto nodevrandom;
}
for (i = 0; i < len; ) {
size_t wanted = len - i;
ssize_t ret = read(fd, (char *)buf + i, wanted);
if (ret == -1) {
if (errno == EAGAIN || errno == EINTR)
continue;
close(fd);
goto nodevrandom;
}
i += ret;
}
close(fd);
if (gotdata(buf, len) == 0) {
errno = save_errno;
return 0; /* satisfied */
}
nodevrandom:
errno = EIO;
return -1;
}
#ifdef SYS__sysctl
static int
getentropy_sysctl(void *buf, size_t len)
{
static int mib[] = { CTL_KERN, KERN_RANDOM, RANDOM_UUID };
size_t i;
int save_errno = errno;
for (i = 0; i < len; ) {
size_t chunk = min(len - i, 16);
/* SYS__sysctl because some systems already removed sysctl() */
struct __sysctl_args args = {
.name = mib,
.nlen = 3,
.oldval = (char *)buf + i,
.oldlenp = &chunk,
};
if (syscall(SYS__sysctl, &args) != 0)
goto sysctlfailed;
i += chunk;
}
if (gotdata(buf, len) == 0) {
errno = save_errno;
return (0); /* satisfied */
}
sysctlfailed:
errno = EIO;
return -1;
}
#endif /* SYS__sysctl */
static int cl[] = {
CLOCK_REALTIME,
#ifdef CLOCK_MONOTONIC
CLOCK_MONOTONIC,
#endif
#ifdef CLOCK_MONOTONIC_RAW
CLOCK_MONOTONIC_RAW,
#endif
#ifdef CLOCK_TAI
CLOCK_TAI,
#endif
#ifdef CLOCK_VIRTUAL
CLOCK_VIRTUAL,
#endif
#ifdef CLOCK_UPTIME
CLOCK_UPTIME,
#endif
#ifdef CLOCK_PROCESS_CPUTIME_ID
CLOCK_PROCESS_CPUTIME_ID,
#endif
#ifdef CLOCK_THREAD_CPUTIME_ID
CLOCK_THREAD_CPUTIME_ID,
#endif
};
static int
getentropy_phdr(struct dl_phdr_info *info, size_t size, void *data)
{
SHA512_CTX *ctx = data;
SHA512_Update(ctx, &info->dlpi_addr, sizeof (info->dlpi_addr));
return 0;
}
static int
getentropy_fallback(void *buf, size_t len)
{
uint8_t results[SHA512_DIGEST_LENGTH];
int save_errno = errno, e, pgs = getpagesize(), faster = 0, repeat;
static int cnt;
struct timespec ts;
struct timeval tv;
struct rusage ru;
sigset_t sigset;
struct stat st;
SHA512_CTX ctx;
static pid_t lastpid;
pid_t pid;
size_t i, ii, m;
char *p;
pid = getpid();
if (lastpid == pid) {
faster = 1;
repeat = 2;
} else {
faster = 0;
lastpid = pid;
repeat = REPEAT;
}
for (i = 0; i < len; ) {
int j;
SHA512_Init(&ctx);
for (j = 0; j < repeat; j++) {
HX((e = gettimeofday(&tv, NULL)) == -1, tv);
if (e != -1) {
cnt += (int)tv.tv_sec;
cnt += (int)tv.tv_usec;
}
dl_iterate_phdr(getentropy_phdr, &ctx);
for (ii = 0; ii < sizeof(cl)/sizeof(cl[0]); ii++)
HX(clock_gettime(cl[ii], &ts) == -1, ts);
HX((pid = getpid()) == -1, pid);
HX((pid = getsid(pid)) == -1, pid);
HX((pid = getppid()) == -1, pid);
HX((pid = getpgid(0)) == -1, pid);
HX((e = getpriority(0, 0)) == -1, e);
if (!faster) {
ts.tv_sec = 0;
ts.tv_nsec = 1;
(void) nanosleep(&ts, NULL);
}
HX(sigpending(&sigset) == -1, sigset);
HX(sigprocmask(SIG_BLOCK, NULL, &sigset) == -1,
sigset);
HF(getentropy); /* an addr in this library */
HF(printf); /* an addr in libc */
p = (char *)&p;
HD(p); /* an addr on stack */
p = (char *)&errno;
HD(p); /* the addr of errno */
if (i == 0) {
struct sockaddr_storage ss;
struct statvfs stvfs;
struct termios tios;
struct statfs stfs;
socklen_t ssl;
off_t off;
/*
* Prime-sized mappings encourage fragmentation;
* thus exposing some address entropy.
*/
struct mm {
size_t npg;
void *p;
} mm[] = {
{ 17, MAP_FAILED }, { 3, MAP_FAILED },
{ 11, MAP_FAILED }, { 2, MAP_FAILED },
{ 5, MAP_FAILED }, { 3, MAP_FAILED },
{ 7, MAP_FAILED }, { 1, MAP_FAILED },
{ 57, MAP_FAILED }, { 3, MAP_FAILED },
{ 131, MAP_FAILED }, { 1, MAP_FAILED },
};
for (m = 0; m < sizeof mm/sizeof(mm[0]); m++) {
HX(mm[m].p = mmap(NULL,
mm[m].npg * pgs,
PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_ANON, -1,
(off_t)0), mm[m].p);
if (mm[m].p != MAP_FAILED) {
size_t mo;
/* Touch some memory... */
p = mm[m].p;
mo = cnt %
(mm[m].npg * pgs - 1);
p[mo] = 1;
cnt += (int)((long)(mm[m].p)
/ pgs);
}
/* Check cnts and times... */
for (ii = 0; ii < sizeof(cl)/sizeof(cl[0]);
ii++) {
HX((e = clock_gettime(cl[ii],
&ts)) == -1, ts);
if (e != -1)
cnt += (int)ts.tv_nsec;
}
HX((e = getrusage(RUSAGE_SELF,
&ru)) == -1, ru);
if (e != -1) {
cnt += (int)ru.ru_utime.tv_sec;
cnt += (int)ru.ru_utime.tv_usec;
}
}
for (m = 0; m < sizeof mm/sizeof(mm[0]); m++) {
if (mm[m].p != MAP_FAILED)
munmap(mm[m].p, mm[m].npg * pgs);
mm[m].p = MAP_FAILED;
}
HX(stat(".", &st) == -1, st);
HX(statvfs(".", &stvfs) == -1, stvfs);
HX(statfs(".", &stfs) == -1, stfs);
HX(stat("/", &st) == -1, st);
HX(statvfs("/", &stvfs) == -1, stvfs);
HX(statfs("/", &stfs) == -1, stfs);
HX((e = fstat(0, &st)) == -1, st);
if (e == -1) {
if (S_ISREG(st.st_mode) ||
S_ISFIFO(st.st_mode) ||
S_ISSOCK(st.st_mode)) {
HX(fstatvfs(0, &stvfs) == -1,
stvfs);
HX(fstatfs(0, &stfs) == -1,
stfs);
HX((off = lseek(0, (off_t)0,
SEEK_CUR)) < 0, off);
}
if (S_ISCHR(st.st_mode)) {
HX(tcgetattr(0, &tios) == -1,
tios);
} else if (S_ISSOCK(st.st_mode)) {
memset(&ss, 0, sizeof ss);
ssl = sizeof(ss);
HX(getpeername(0,
(void *)&ss, &ssl) == -1,
ss);
}
}
HX((e = getrusage(RUSAGE_CHILDREN,
&ru)) == -1, ru);
if (e != -1) {
cnt += (int)ru.ru_utime.tv_sec;
cnt += (int)ru.ru_utime.tv_usec;
}
} else {
/* Subsequent hashes absorb previous result */
HD(results);
}
HX((e = gettimeofday(&tv, NULL)) == -1, tv);
if (e != -1) {
cnt += (int)tv.tv_sec;
cnt += (int)tv.tv_usec;
}
HD(cnt);
}
#ifdef HAVE_GETAUXVAL
#ifdef AT_RANDOM
/* Not as random as you think but we take what we are given */
p = (char *) getauxval(AT_RANDOM);
if (p)
HR(p, 16);
#endif
#ifdef AT_SYSINFO_EHDR
p = (char *) getauxval(AT_SYSINFO_EHDR);
if (p)
HR(p, pgs);
#endif
#ifdef AT_BASE
p = (char *) getauxval(AT_BASE);
if (p)
HD(p);
#endif
#endif
SHA512_Final(results, &ctx);
memcpy((char *)buf + i, results, min(sizeof(results), len - i));
i += min(sizeof(results), len - i);
}
explicit_bzero(&ctx, sizeof ctx);
explicit_bzero(results, sizeof results);
if (gotdata(buf, len) == 0) {
errno = save_errno;
return 0; /* satisfied */
}
errno = EIO;
return -1;
}

+ 0
- 429
src/lib/libcrypto/arc4random/getentropy_osx.c View File

@ -1,429 +0,0 @@
/* $OpenBSD: getentropy_osx.c,v 1.8 2014/07/21 20:19:47 guenther Exp $ */
/*
* Copyright (c) 2014 Theo de Raadt <deraadt@openbsd.org>
* Copyright (c) 2014 Bob Beck <beck@obtuse.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
* Emulation of getentropy(2) as documented at:
* http://www.openbsd.org/cgi-bin/man.cgi/OpenBSD-current/man2/getentropy.2
*/
#include <sys/types.h>
#include <sys/param.h>
#include <sys/ioctl.h>
#include <sys/resource.h>
#include <sys/syscall.h>
#include <sys/sysctl.h>
#include <sys/statvfs.h>
#include <sys/socket.h>
#include <sys/mount.h>
#include <sys/mman.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <stdlib.h>
#include <stdint.h>
#include <stdio.h>
#include <termios.h>
#include <fcntl.h>
#include <signal.h>
#include <string.h>
#include <errno.h>
#include <unistd.h>
#include <time.h>
#include <mach/mach_time.h>
#include <mach/mach_host.h>
#include <mach/host_info.h>
#include <sys/socketvar.h>
#include <sys/vmmeter.h>
#include <netinet/in.h>
#include <netinet/tcp.h>
#include <netinet/udp.h>
#include <netinet/ip_var.h>
#include <netinet/tcp_var.h>
#include <netinet/udp_var.h>
#include <CommonCrypto/CommonDigest.h>
#define SHA512_Update(a, b, c) (CC_SHA512_Update((a), (b), (c)))
#define SHA512_Init(xxx) (CC_SHA512_Init((xxx)))
#define SHA512_Final(xxx, yyy) (CC_SHA512_Final((xxx), (yyy)))
#define SHA512_CTX CC_SHA512_CTX
#define SHA512_DIGEST_LENGTH CC_SHA512_DIGEST_LENGTH
#define REPEAT 5
#define min(a, b) (((a) < (b)) ? (a) : (b))
#define HX(a, b) \
do { \
if ((a)) \
HD(errno); \
else \
HD(b); \
} while (0)
#define HR(x, l) (SHA512_Update(&ctx, (char *)(x), (l)))
#define HD(x) (SHA512_Update(&ctx, (char *)&(x), sizeof (x)))
#define HF(x) (SHA512_Update(&ctx, (char *)&(x), sizeof (void*)))
int getentropy(void *buf, size_t len);
static int gotdata(char *buf, size_t len);
static int getentropy_urandom(void *buf, size_t len);
static int getentropy_fallback(void *buf, size_t len);
int
getentropy(void *buf, size_t len)
{
int ret = -1;
if (len > 256) {
errno = EIO;
return -1;
}
/*
* Try to get entropy with /dev/urandom
*
* This can fail if the process is inside a chroot or if file
* descriptors are exhausted.
*/
ret = getentropy_urandom(buf, len);
if (ret != -1)
return (ret);
/*
* Entropy collection via /dev/urandom and sysctl have failed.
*
* No other API exists for collecting entropy, and we have
* no failsafe way to get it on OSX that is not sensitive
* to resource exhaustion.
*
* We have very few options:
* - Even syslog_r is unsafe to call at this low level, so
* there is no way to alert the user or program.
* - Cannot call abort() because some systems have unsafe
* corefiles.
* - Could raise(SIGKILL) resulting in silent program termination.
* - Return EIO, to hint that arc4random's stir function
* should raise(SIGKILL)
* - Do the best under the circumstances....
*
* This code path exists to bring light to the issue that OSX
* does not provide a failsafe API for entropy collection.
*
* We hope this demonstrates that OSX should consider
* providing a new failsafe API which works in a chroot or
* when file descriptors are exhausted.
*/
#undef FAIL_INSTEAD_OF_TRYING_FALLBACK
#ifdef FAIL_INSTEAD_OF_TRYING_FALLBACK
raise(SIGKILL);
#endif
ret = getentropy_fallback(buf, len);
if (ret != -1)
return (ret);
errno = EIO;
return (ret);
}
/*
* Basic sanity checking; wish we could do better.
*/
static int
gotdata(char *buf, size_t len)
{
char any_set = 0;
size_t i;
for (i = 0; i < len; ++i)
any_set |= buf[i];
if (any_set == 0)
return -1;
return 0;
}
static int
getentropy_urandom(void *buf, size_t len)
{
struct stat st;
size_t i;
int fd, flags;
int save_errno = errno;
start:
flags = O_RDONLY;
#ifdef O_NOFOLLOW
flags |= O_NOFOLLOW;
#endif
#ifdef O_CLOEXEC
flags |= O_CLOEXEC;
#endif
fd = open("/dev/urandom", flags, 0);
if (fd == -1) {
if (errno == EINTR)
goto start;
goto nodevrandom;
}
#ifndef O_CLOEXEC
fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC);
#endif
/* Lightly verify that the device node looks sane */
if (fstat(fd, &st) == -1 || !S_ISCHR(st.st_mode)) {
close(fd);
goto nodevrandom;
}
for (i = 0; i < len; ) {
size_t wanted = len - i;
ssize_t ret = read(fd, (char *)buf + i, wanted);
if (ret == -1) {
if (errno == EAGAIN || errno == EINTR)
continue;
close(fd);
goto nodevrandom;
}
i += ret;
}
close(fd);
if (gotdata(buf, len) == 0) {
errno = save_errno;
return 0; /* satisfied */
}
nodevrandom:
errno = EIO;
return -1;
}
static int tcpmib[] = { CTL_NET, AF_INET, IPPROTO_TCP, TCPCTL_STATS };
static int udpmib[] = { CTL_NET, AF_INET, IPPROTO_UDP, UDPCTL_STATS };
static int ipmib[] = { CTL_NET, AF_INET, IPPROTO_IP, IPCTL_STATS };
static int kmib[] = { CTL_KERN, KERN_USRSTACK };
static int hwmib[] = { CTL_HW, HW_USERMEM };
static int
getentropy_fallback(void *buf, size_t len)
{
uint8_t results[SHA512_DIGEST_LENGTH];
int save_errno = errno, e, pgs = getpagesize(), faster = 0, repeat;
static int cnt;
struct timespec ts;
struct timeval tv;
struct rusage ru;
sigset_t sigset;
struct stat st;
SHA512_CTX ctx;
static pid_t lastpid;
pid_t pid;
size_t i, ii, m;
char *p;
struct tcpstat tcpstat;
struct udpstat udpstat;
struct ipstat ipstat;
u_int64_t mach_time;
unsigned int idata;
void *addr;
pid = getpid();
if (lastpid == pid) {
faster = 1;
repeat = 2;
} else {
faster = 0;
lastpid = pid;
repeat = REPEAT;
}
for (i = 0; i < len; ) {
int j;
SHA512_Init(&ctx);
for (j = 0; j < repeat; j++) {
HX((e = gettimeofday(&tv, NULL)) == -1, tv);
if (e != -1) {
cnt += (int)tv.tv_sec;
cnt += (int)tv.tv_usec;
}
mach_time = mach_absolute_time();
HD(mach_time);
ii = sizeof(addr);
HX(sysctl(kmib, sizeof(kmib) / sizeof(kmib[0]),
&addr, &ii, NULL, 0) == -1, addr);
ii = sizeof(idata);
HX(sysctl(hwmib, sizeof(hwmib) / sizeof(hwmib[0]),
&idata, &ii, NULL, 0) == -1, idata);
ii = sizeof(tcpstat);
HX(sysctl(tcpmib, sizeof(tcpmib) / sizeof(tcpmib[0]),
&tcpstat, &ii, NULL, 0) == -1, tcpstat);
ii = sizeof(udpstat);
HX(sysctl(udpmib, sizeof(udpmib) / sizeof(udpmib[0]),
&udpstat, &ii, NULL, 0) == -1, udpstat);
ii = sizeof(ipstat);
HX(sysctl(ipmib, sizeof(ipmib) / sizeof(ipmib[0]),
&ipstat, &ii, NULL, 0) == -1, ipstat);
HX((pid = getpid()) == -1, pid);
HX((pid = getsid(pid)) == -1, pid);
HX((pid = getppid()) == -1, pid);
HX((pid = getpgid(0)) == -1, pid);
HX((e = getpriority(0, 0)) == -1, e);
if (!faster) {
ts.tv_sec = 0;
ts.tv_nsec = 1;
(void) nanosleep(&ts, NULL);
}
HX(sigpending(&sigset) == -1, sigset);
HX(sigprocmask(SIG_BLOCK, NULL, &sigset) == -1,
sigset);
HF(getentropy); /* an addr in this library */
HF(printf); /* an addr in libc */
p = (char *)&p;
HD(p); /* an addr on stack */
p = (char *)&errno;
HD(p); /* the addr of errno */
if (i == 0) {
struct sockaddr_storage ss;
struct statvfs stvfs;
struct termios tios;
struct statfs stfs;
socklen_t ssl;
off_t off;
/*
* Prime-sized mappings encourage fragmentation;
* thus exposing some address entropy.
*/
struct mm {
size_t npg;
void *p;
} mm[] = {
{ 17, MAP_FAILED }, { 3, MAP_FAILED },
{ 11, MAP_FAILED }, { 2, MAP_FAILED },
{ 5, MAP_FAILED }, { 3, MAP_FAILED },
{ 7, MAP_FAILED }, { 1, MAP_FAILED },
{ 57, MAP_FAILED }, { 3, MAP_FAILED },
{ 131, MAP_FAILED }, { 1, MAP_FAILED },
};
for (m = 0; m < sizeof mm/sizeof(mm[0]); m++) {
HX(mm[m].p = mmap(NULL,
mm[m].npg * pgs,
PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_ANON, -1,
(off_t)0), mm[m].p);
if (mm[m].p != MAP_FAILED) {
size_t mo;
/* Touch some memory... */
p = mm[m].p;
mo = cnt %
(mm[m].npg * pgs - 1);
p[mo] = 1;
cnt += (int)((long)(mm[m].p)
/ pgs);
}
/* Check cnts and times... */
mach_time = mach_absolute_time();
HD(mach_time);
cnt += (int)mach_time;
HX((e = getrusage(RUSAGE_SELF,
&ru)) == -1, ru);
if (e != -1) {
cnt += (int)ru.ru_utime.tv_sec;
cnt += (int)ru.ru_utime.tv_usec;
}
}
for (m = 0; m < sizeof mm/sizeof(mm[0]); m++) {
if (mm[m].p != MAP_FAILED)
munmap(mm[m].p, mm[m].npg * pgs);
mm[m].p = MAP_FAILED;
}
HX(stat(".", &st) == -1, st);
HX(statvfs(".", &stvfs) == -1, stvfs);
HX(statfs(".", &stfs) == -1, stfs);
HX(stat("/", &st) == -1, st);
HX(statvfs("/", &stvfs) == -1, stvfs);
HX(statfs("/", &stfs) == -1, stfs);
HX((e = fstat(0, &st)) == -1, st);
if (e == -1) {
if (S_ISREG(st.st_mode) ||
S_ISFIFO(st.st_mode) ||
S_ISSOCK(st.st_mode)) {
HX(fstatvfs(0, &stvfs) == -1,
stvfs);
HX(fstatfs(0, &stfs) == -1,
stfs);
HX((off = lseek(0, (off_t)0,
SEEK_CUR)) < 0, off);
}
if (S_ISCHR(st.st_mode)) {
HX(tcgetattr(0, &tios) == -1,
tios);
} else if (S_ISSOCK(st.st_mode)) {
memset(&ss, 0, sizeof ss);
ssl = sizeof(ss);
HX(getpeername(0,
(void *)&ss, &ssl) == -1,
ss);
}
}
HX((e = getrusage(RUSAGE_CHILDREN,
&ru)) == -1, ru);
if (e != -1) {
cnt += (int)ru.ru_utime.tv_sec;
cnt += (int)ru.ru_utime.tv_usec;
}
} else {
/* Subsequent hashes absorb previous result */
HD(results);
}
HX((e = gettimeofday(&tv, NULL)) == -1, tv);
if (e != -1) {
cnt += (int)tv.tv_sec;
cnt += (int)tv.tv_usec;
}
HD(cnt);
}
SHA512_Final(results, &ctx);
memcpy((char *)buf + i, results, min(sizeof(results), len - i));
i += min(sizeof(results), len - i);
}
explicit_bzero(&ctx, sizeof ctx);
explicit_bzero(results, sizeof results);
if (gotdata(buf, len) == 0) {
errno = save_errno;
return 0; /* satisfied */
}
errno = EIO;
return -1;
}

+ 0
- 445
src/lib/libcrypto/arc4random/getentropy_solaris.c View File

@ -1,445 +0,0 @@
/* $OpenBSD: getentropy_solaris.c,v 1.9 2014/07/21 20:19:47 guenther Exp $ */
/*
* Copyright (c) 2014 Theo de Raadt <deraadt@openbsd.org>
* Copyright (c) 2014 Bob Beck <beck@obtuse.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
* Emulation of getentropy(2) as documented at:
* http://www.openbsd.org/cgi-bin/man.cgi/OpenBSD-current/man2/getentropy.2
*/
#include <sys/types.h>
#include <sys/param.h>
#include <sys/ioctl.h>
#include <sys/resource.h>
#include <sys/syscall.h>
#include <sys/statvfs.h>
#include <sys/socket.h>
#include <sys/mount.h>
#include <sys/mman.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <stdlib.h>
#include <stdint.h>
#include <stdio.h>
#include <link.h>
#include <termios.h>
#include <fcntl.h>
#include <signal.h>
#include <string.h>
#include <errno.h>
#include <unistd.h>
#include <time.h>
#include <sys/sha2.h>
#define SHA512_Init SHA512Init
#define SHA512_Update SHA512Update
#define SHA512_Final SHA512Final
#include <sys/vfs.h>
#include <sys/statfs.h>
#include <sys/loadavg.h>
#define REPEAT 5
#define min(a, b) (((a) < (b)) ? (a) : (b))
#define HX(a, b) \
do { \
if ((a)) \
HD(errno); \
else \
HD(b); \
} while (0)
#define HR(x, l) (SHA512_Update(&ctx, (char *)(x), (l)))
#define HD(x) (SHA512_Update(&ctx, (char *)&(x), sizeof (x)))
#define HF(x) (SHA512_Update(&ctx, (char *)&(x), sizeof (void*)))
int getentropy(void *buf, size_t len);
static int gotdata(char *buf, size_t len);
static int getentropy_urandom(void *buf, size_t len, const char *path,
int devfscheck);
static int getentropy_fallback(void *buf, size_t len);
static int getentropy_phdr(struct dl_phdr_info *info, size_t size, void *data);
int
getentropy(void *buf, size_t len)
{
int ret = -1;
if (len > 256) {
errno = EIO;
return -1;
}
/*
* Try to get entropy with /dev/urandom
*
* Solaris provides /dev/urandom as a symbolic link to
* /devices/pseudo/random@0:urandom which is provided by
* a devfs filesystem. Best practice is to use O_NOFOLLOW,
* so we must try the unpublished name directly.
*
* This can fail if the process is inside a chroot which lacks
* the devfs mount, or if file descriptors are exhausted.
*/
ret = getentropy_urandom(buf, len,
"/devices/pseudo/random@0:urandom", 1);
if (ret != -1)
return (ret);
/*
* Unfortunately, chroot spaces on Solaris are sometimes setup
* with direct device node of the well-known /dev/urandom name
* (perhaps to avoid dragging all of devfs into the space).
*
* This can fail if the process is inside a chroot or if file
* descriptors are exhausted.
*/
ret = getentropy_urandom(buf, len, "/dev/urandom", 0);
if (ret != -1)
return (ret);
/*
* Entropy collection via /dev/urandom has failed.
*
* No other API exists for collecting entropy, and we have
* no failsafe way to get it on Solaris that is not sensitive
* to resource exhaustion.
*
* We have very few options:
* - Even syslog_r is unsafe to call at this low level, so
* there is no way to alert the user or program.
* - Cannot call abort() because some systems have unsafe
* corefiles.
* - Could raise(SIGKILL) resulting in silent program termination.
* - Return EIO, to hint that arc4random's stir function
* should raise(SIGKILL)
* - Do the best under the circumstances....
*
* This code path exists to bring light to the issue that Solaris
* does not provide a failsafe API for entropy collection.
*
* We hope this demonstrates that Solaris should consider
* providing a new failsafe API which works in a chroot or
* when file descriptors are exhausted.
*/
#undef FAIL_INSTEAD_OF_TRYING_FALLBACK
#ifdef FAIL_INSTEAD_OF_TRYING_FALLBACK
raise(SIGKILL);
#endif
ret = getentropy_fallback(buf, len);
if (ret != -1)
return (ret);
errno = EIO;
return (ret);
}
/*
* Basic sanity checking; wish we could do better.
*/
static int
gotdata(char *buf, size_t len)
{
char any_set = 0;
size_t i;
for (i = 0; i < len; ++i)
any_set |= buf[i];
if (any_set == 0)
return -1;
return 0;
}
static int
getentropy_urandom(void *buf, size_t len, const char *path, int devfscheck)
{
struct stat st;
size_t i;
int fd, flags;
int save_errno = errno;
start:
flags = O_RDONLY;
#ifdef O_NOFOLLOW
flags |= O_NOFOLLOW;
#endif
#ifdef O_CLOEXEC
flags |= O_CLOEXEC;
#endif
fd = open(path, flags, 0);
if (fd == -1) {
if (errno == EINTR)
goto start;
goto nodevrandom;
}
#ifndef O_CLOEXEC
fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC);
#endif
/* Lightly verify that the device node looks sane */
if (fstat(fd, &st) == -1 || !S_ISCHR(st.st_mode) ||
(devfscheck && (strcmp(st.st_fstype, "devfs") != 0))) {
close(fd);
goto nodevrandom;
}
for (i = 0; i < len; ) {
size_t wanted = len - i;
ssize_t ret = read(fd, (char *)buf + i, wanted);
if (ret == -1) {
if (errno == EAGAIN || errno == EINTR)
continue;
close(fd);
goto nodevrandom;
}
i += ret;
}
close(fd);
if (gotdata(buf, len) == 0) {
errno = save_errno;
return 0; /* satisfied */
}
nodevrandom:
errno = EIO;
return -1;
}
static const int cl[] = {
CLOCK_REALTIME,
#ifdef CLOCK_MONOTONIC
CLOCK_MONOTONIC,
#endif
#ifdef CLOCK_MONOTONIC_RAW
CLOCK_MONOTONIC_RAW,
#endif
#ifdef CLOCK_TAI
CLOCK_TAI,
#endif
#ifdef CLOCK_VIRTUAL
CLOCK_VIRTUAL,
#endif
#ifdef CLOCK_UPTIME
CLOCK_UPTIME,
#endif
#ifdef CLOCK_PROCESS_CPUTIME_ID
CLOCK_PROCESS_CPUTIME_ID,
#endif
#ifdef CLOCK_THREAD_CPUTIME_ID
CLOCK_THREAD_CPUTIME_ID,
#endif
};
static int
getentropy_phdr(struct dl_phdr_info *info, size_t size, void *data)
{
SHA512_CTX *ctx = data;
SHA512_Update(ctx, &info->dlpi_addr, sizeof (info->dlpi_addr));
return 0;
}
static int
getentropy_fallback(void *buf, size_t len)
{
uint8_t results[SHA512_DIGEST_LENGTH];
int save_errno = errno, e, pgs = getpagesize(), faster = 0, repeat;
static int cnt;
struct timespec ts;
struct timeval tv;
double loadavg[3];
struct rusage ru;
sigset_t sigset;
struct stat st;
SHA512_CTX ctx;
static pid_t lastpid;
pid_t pid;
size_t i, ii, m;
char *p;
pid = getpid();
if (lastpid == pid) {
faster = 1;
repeat = 2;
} else {
faster = 0;
lastpid = pid;
repeat = REPEAT;
}
for (i = 0; i < len; ) {
int j;
SHA512_Init(&ctx);
for (j = 0; j < repeat; j++) {
HX((e = gettimeofday(&tv, NULL)) == -1, tv);
if (e != -1) {
cnt += (int)tv.tv_sec;
cnt += (int)tv.tv_usec;
}
dl_iterate_phdr(getentropy_phdr, &ctx);
for (ii = 0; ii < sizeof(cl)/sizeof(cl[0]); ii++)
HX(clock_gettime(cl[ii], &ts) == -1, ts);
HX((pid = getpid()) == -1, pid);
HX((pid = getsid(pid)) == -1, pid);
HX((pid = getppid()) == -1, pid);
HX((pid = getpgid(0)) == -1, pid);
HX((e = getpriority(0, 0)) == -1, e);
HX((getloadavg(loadavg, 3) == -1), loadavg);
if (!faster) {
ts.tv_sec = 0;
ts.tv_nsec = 1;
(void) nanosleep(&ts, NULL);
}
HX(sigpending(&sigset) == -1, sigset);
HX(sigprocmask(SIG_BLOCK, NULL, &sigset) == -1,
sigset);
HF(getentropy); /* an addr in this library */
HF(printf); /* an addr in libc */
p = (char *)&p;
HD(p); /* an addr on stack */
p = (char *)&errno;
HD(p); /* the addr of errno */
if (i == 0) {
struct sockaddr_storage ss;
struct statvfs stvfs;
struct termios tios;
socklen_t ssl;
off_t off;
/*
* Prime-sized mappings encourage fragmentation;
* thus exposing some address entropy.
*/
struct mm {
size_t npg;
void *p;
} mm[] = {
{ 17, MAP_FAILED }, { 3, MAP_FAILED },
{ 11, MAP_FAILED }, { 2, MAP_FAILED },
{ 5, MAP_FAILED }, { 3, MAP_FAILED },
{ 7, MAP_FAILED }, { 1, MAP_FAILED },
{ 57, MAP_FAILED }, { 3, MAP_FAILED },
{ 131, MAP_FAILED }, { 1, MAP_FAILED },
};
for (m = 0; m < sizeof mm/sizeof(mm[0]); m++) {
HX(mm[m].p = mmap(NULL,
mm[m].npg * pgs,
PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_ANON, -1,
(off_t)0), mm[m].p);
if (mm[m].p != MAP_FAILED) {
size_t mo;
/* Touch some memory... */
p = mm[m].p;
mo = cnt %
(mm[m].npg * pgs - 1);
p[mo] = 1;
cnt += (int)((long)(mm[m].p)
/ pgs);
}
/* Check cnts and times... */
for (ii = 0; ii < sizeof(cl)/sizeof(cl[0]);
ii++) {
HX((e = clock_gettime(cl[ii],
&ts)) == -1, ts);
if (e != -1)
cnt += (int)ts.tv_nsec;
}
HX((e = getrusage(RUSAGE_SELF,
&ru)) == -1, ru);
if (e != -1) {
cnt += (int)ru.ru_utime.tv_sec;
cnt += (int)ru.ru_utime.tv_usec;
}
}
for (m = 0; m < sizeof mm/sizeof(mm[0]); m++) {
if (mm[m].p != MAP_FAILED)
munmap(mm[m].p, mm[m].npg * pgs);
mm[m].p = MAP_FAILED;
}
HX(stat(".", &st) == -1, st);
HX(statvfs(".", &stvfs) == -1, stvfs);
HX(stat("/", &st) == -1, st);
HX(statvfs("/", &stvfs) == -1, stvfs);
HX((e = fstat(0, &st)) == -1, st);
if (e == -1) {
if (S_ISREG(st.st_mode) ||
S_ISFIFO(st.st_mode) ||
S_ISSOCK(st.st_mode)) {
HX(fstatvfs(0, &stvfs) == -1,
stvfs);
HX((off = lseek(0, (off_t)0,
SEEK_CUR)) < 0, off);
}
if (S_ISCHR(st.st_mode)) {
HX(tcgetattr(0, &tios) == -1,
tios);
} else if (S_ISSOCK(st.st_mode)) {
memset(&ss, 0, sizeof ss);
ssl = sizeof(ss);
HX(getpeername(0,
(void *)&ss, &ssl) == -1,
ss);
}
}
HX((e = getrusage(RUSAGE_CHILDREN,
&ru)) == -1, ru);
if (e != -1) {
cnt += (int)ru.ru_utime.tv_sec;
cnt += (int)ru.ru_utime.tv_usec;
}
} else {
/* Subsequent hashes absorb previous result */
HD(results);
}
HX((e = gettimeofday(&tv, NULL)) == -1, tv);
if (e != -1) {
cnt += (int)tv.tv_sec;
cnt += (int)tv.tv_usec;
}
HD(cnt);
}
SHA512_Final(results, &ctx);
memcpy((char *)buf + i, results, min(sizeof(results), len - i));
i += min(sizeof(results), len - i);
}
explicit_bzero(&ctx, sizeof ctx);
explicit_bzero(results, sizeof results);
if (gotdata(buf, len) == 0) {
errno = save_errno;
return 0; /* satisfied */
}
errno = EIO;
return -1;
}

+ 0
- 59
src/lib/libcrypto/arc4random/getentropy_win.c View File

@ -1,59 +0,0 @@
/* $OpenBSD: getentropy_win.c,v 1.2 2014/07/13 13:03:09 deraadt Exp $ */
/*
* Copyright (c) 2014, Theo de Raadt <deraadt@openbsd.org>
* Copyright (c) 2014, Bob Beck <beck@obtuse.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
* Emulation of getentropy(2) as documented at:
* http://www.openbsd.org/cgi-bin/man.cgi/OpenBSD-current/man2/getentropy.2
*/
#include <windows.h>
#include <errno.h>
#include <stdint.h>
#include <sys/types.h>
#include <wincrypt.h>
#include <process.h>
int getentropy(void *buf, size_t len);
/*
* On Windows, CryptGenRandom is supposed to be a well-seeded
* cryptographically strong random number generator.
*/
int
getentropy(void *buf, size_t len)
{
HCRYPTPROV provider;
if (len > 256) {
errno = EIO;
return -1;
}
if (CryptAcquireContext(&provider, NULL, NULL, PROV_RSA_FULL,
CRYPT_VERIFYCONTEXT) != 0)
goto fail;
if (CryptGenRandom(provider, len, buf) != 0) {
CryptReleaseContext(provider, 0);
goto fail;
}
CryptReleaseContext(provider, 0);
return (0);
fail:
errno = EIO;
return (-1);
}

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