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Add getrandom(2) support for FreeBSD 12

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Fixes #762
This commit is contained in:
Frank Denis
2018-09-29 22:37:39 +02:00
parent ff15272cf0
commit 52fdd7ab39
2 changed files with 31 additions and 17 deletions
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src/libsodium/randombytes/salsa20/randombytes_salsa20_random.c
+16 -9
View File
@@ -19,9 +19,20 @@
#ifdef __linux__
# ifdef __dietlibc__
# define _LINUX_SOURCE
# include <sys/random.h>
# define HAVE_LINUX_COMPATIBLE_GETRANDOM
# else
# include <sys/syscall.h>
# if defined(SYS_getrandom) && defined(__NR_getrandom)
# define getrandom(B, S, F) syscall(SYS_getrandom, (B), (int) (S), (F))
# define HAVE_LINUX_COMPATIBLE_GETRANDOM
# endif
# endif
#elif defined(__FreeBSD_version) && __FreeBSD_version >= 1200000
# include <sys/random.h>
# define HAVE_LINUX_COMPATIBLE_GETRANDOM
#endif
#ifdef HAVE_LINUX_COMPATIBLE_GETRANDOM
# include <poll.h>
#endif
#ifdef HAVE_RDRAND
@@ -246,7 +257,7 @@ randombytes_salsa20_random_random_dev_open(void)
}
# endif
# if defined(__dietlibc__) || (defined(SYS_getrandom) && defined(__NR_getrandom))
# ifdef HAVE_LINUX_COMPATIBLE_GETRANDOM
static int
_randombytes_linux_getrandom(void * const buf, const size_t size)
{
@@ -254,11 +265,7 @@ _randombytes_linux_getrandom(void * const buf, const size_t size)
assert(size <= 256U);
do {
# ifdef __dietlibc__
readnb = getrandom(buf, size, 0);
# else
readnb = syscall(SYS_getrandom, buf, (int) size, 0);
# endif
} while (readnb < 0 && (errno == EINTR || errno == EAGAIN));
return (readnb == (int) size) - 1;
@@ -299,7 +306,7 @@ randombytes_salsa20_random_init(void)
errno = errno_save;
# else
# if defined(SYS_getrandom) && defined(__NR_getrandom)
# ifdef HAVE_LINUX_COMPATIBLE_GETRANDOM
{
unsigned char fodder[16];
@@ -310,7 +317,7 @@ randombytes_salsa20_random_init(void)
}
global.getrandom_available = 0;
}
# endif /* SYS_getrandom */
# endif /* HAVE_LINUX_COMPATIBLE_GETRANDOM */
if ((global.random_data_source_fd =
randombytes_salsa20_random_random_dev_open()) == -1) {
@@ -343,7 +350,7 @@ randombytes_salsa20_random_stir(void)
# ifdef HAVE_SAFE_ARC4RANDOM
arc4random_buf(stream.key, sizeof stream.key);
# elif defined(SYS_getrandom) && defined(__NR_getrandom)
# elif defined(HAVE_LINUX_COMPATIBLE_GETRANDOM)
if (global.getrandom_available != 0) {
if (randombytes_linux_getrandom(stream.key, sizeof stream.key) != 0) {
sodium_misuse(); /* LCOV_EXCL_LINE */
@@ -428,7 +435,7 @@ randombytes_salsa20_random_close(void)
ret = 0;
# endif
# if defined(SYS_getrandom) && defined(__NR_getrandom)
# ifdef HAVE_LINUX_COMPATIBLE_GETRANDOM
if (global.getrandom_available != 0) {
ret = 0;
}
src/libsodium/randombytes/sysrandom/randombytes_sysrandom.c
+15 -8
View File
@@ -18,9 +18,20 @@
#ifdef __linux__
# ifdef __dietlibc__
# define _LINUX_SOURCE
# include <sys/random.h>
# define HAVE_LINUX_COMPATIBLE_GETRANDOM
# else
# include <sys/syscall.h>
# if defined(SYS_getrandom) && defined(__NR_getrandom)
# define getrandom(B, S, F) syscall(SYS_getrandom, (B), (int) (S), (F))
# define HAVE_LINUX_COMPATIBLE_GETRANDOM
# endif
# endif
#elif defined(__FreeBSD_version) && __FreeBSD_version >= 1200000
# include <sys/random.h>
# define HAVE_LINUX_COMPATIBLE_GETRANDOM
#endif
#ifdef HAVE_LINUX_COMPATIBLE_GETRANDOM
# include <poll.h>
#endif
@@ -204,7 +215,7 @@ randombytes_sysrandom_random_dev_open(void)
/* LCOV_EXCL_STOP */
}
# if defined(__dietlibc__) || (defined(SYS_getrandom) && defined(__NR_getrandom))
# ifdef HAVE_LINUX_COMPATIBLE_GETRANDOM
static int
_randombytes_linux_getrandom(void * const buf, const size_t size)
{
@@ -212,11 +223,7 @@ _randombytes_linux_getrandom(void * const buf, const size_t size)
assert(size <= 256U);
do {
# ifdef __dietlibc__
readnb = getrandom(buf, size, 0);
# else
readnb = syscall(SYS_getrandom, buf, (int) size, 0);
# endif
} while (readnb < 0 && (errno == EINTR || errno == EAGAIN));
return (readnb == (int) size) - 1;
@@ -249,7 +256,7 @@ randombytes_sysrandom_init(void)
{
const int errno_save = errno;
# if defined(SYS_getrandom) && defined(__NR_getrandom)
# ifdef HAVE_LINUX_COMPATIBLE_GETRANDOM
{
unsigned char fodder[16];
@@ -306,7 +313,7 @@ randombytes_sysrandom_close(void)
stream.initialized = 0;
ret = 0;
}
# if defined(SYS_getrandom) && defined(__NR_getrandom)
# ifdef HAVE_LINUX_COMPATIBLE_GETRANDOM
if (stream.getrandom_available != 0) {
ret = 0;
}
@@ -331,7 +338,7 @@ randombytes_sysrandom_buf(void * const buf, const size_t size)
# endif
#endif
#ifndef _WIN32
# if defined(SYS_getrandom) && defined(__NR_getrandom)
# ifdef HAVE_LINUX_COMPATIBLE_GETRANDOM
if (stream.getrandom_available != 0) {
if (randombytes_linux_getrandom(buf, size) != 0) {
sodium_misuse(); /* LCOV_EXCL_LINE */