86 lines
3.0 KiB
Diff
86 lines
3.0 KiB
Diff
diff -up libgcrypt-1.8.1/random/random-csprng.c.getrandom libgcrypt-1.8.1/random/random-csprng.c
|
|
--- libgcrypt-1.8.1/random/random-csprng.c.getrandom 2017-08-27 09:05:36.000000000 +0200
|
|
+++ libgcrypt-1.8.1/random/random-csprng.c 2017-12-06 09:04:27.824175303 +0100
|
|
@@ -55,6 +55,10 @@
|
|
#ifdef __MINGW32__
|
|
#include <process.h>
|
|
#endif
|
|
+#if defined(__linux__) && defined(HAVE_SYSCALL)
|
|
+# include <sys/syscall.h>
|
|
+# include <linux/random.h>
|
|
+#endif
|
|
#include "g10lib.h"
|
|
#include "random.h"
|
|
#include "rand-internal.h"
|
|
@@ -1116,6 +1120,22 @@ getfnc_gather_random (void))(void (*)(co
|
|
enum random_origins, size_t, int);
|
|
|
|
#if USE_RNDLINUX
|
|
+#if defined(__linux__) && defined(HAVE_SYSCALL) && defined(__NR_getrandom)
|
|
+ long ret;
|
|
+ char buffer[1];
|
|
+
|
|
+ _gcry_pre_syscall ();
|
|
+ ret = syscall (__NR_getrandom,
|
|
+ (void*)buffer, (size_t)1, (unsigned int)GRND_NONBLOCK);
|
|
+ _gcry_post_syscall ();
|
|
+ if (ret != -1 || errno != ENOSYS)
|
|
+ {
|
|
+ fnc = _gcry_rndlinux_gather_random;
|
|
+ return fnc;
|
|
+ }
|
|
+ else
|
|
+ /* The syscall is not supported - fallback to /dev/urandom. */
|
|
+#endif
|
|
if ( !access (NAME_OF_DEV_RANDOM, R_OK)
|
|
&& !access (NAME_OF_DEV_URANDOM, R_OK))
|
|
{
|
|
diff -up libgcrypt-1.8.1/random/rndlinux.c.getrandom libgcrypt-1.8.1/random/rndlinux.c
|
|
--- libgcrypt-1.8.1/random/rndlinux.c.getrandom 2017-09-05 14:34:28.003872675 +0200
|
|
+++ libgcrypt-1.8.1/random/rndlinux.c 2018-02-06 16:31:56.047481806 +0100
|
|
@@ -35,6 +35,7 @@
|
|
#include <poll.h>
|
|
#if defined(__linux__) && defined(HAVE_SYSCALL)
|
|
# include <sys/syscall.h>
|
|
+# include <linux/random.h>
|
|
#endif
|
|
|
|
#include "types.h"
|
|
@@ -204,6 +205,16 @@ _gcry_rndlinux_gather_random (void (*add
|
|
{
|
|
if (fd_urandom == -1)
|
|
{
|
|
+#if defined(__linux__) && defined(HAVE_SYSCALL) && defined(__NR_getrandom)
|
|
+ long ret;
|
|
+
|
|
+ _gcry_pre_syscall ();
|
|
+ ret = syscall (__NR_getrandom,
|
|
+ (void*)buffer, (size_t)1, (unsigned int)GRND_NONBLOCK);
|
|
+ _gcry_post_syscall ();
|
|
+ if (ret == -1 && errno == ENOSYS)
|
|
+ /* The syscall is not supported - fallback to /dev/urandom. */
|
|
+#endif
|
|
fd_urandom = open_device (NAME_OF_DEV_URANDOM, (ever_opened & 2));
|
|
ever_opened |= 2;
|
|
}
|
|
@@ -230,7 +241,7 @@ _gcry_rndlinux_gather_random (void (*add
|
|
* syscall and not a new device and thus we are not able to use
|
|
* select(2) to have a timeout. */
|
|
#if defined(__linux__) && defined(HAVE_SYSCALL) && defined(__NR_getrandom)
|
|
- if (fd == fd_urandom)
|
|
+ if (fd == -1)
|
|
{
|
|
long ret;
|
|
size_t nbytes;
|
|
@@ -246,9 +257,7 @@ _gcry_rndlinux_gather_random (void (*add
|
|
_gcry_post_syscall ();
|
|
}
|
|
while (ret == -1 && errno == EINTR);
|
|
- if (ret == -1 && errno == ENOSYS)
|
|
- ; /* The syscall is not supported - fallback to /dev/urandom. */
|
|
- else
|
|
+ if (1)
|
|
{ /* The syscall is supported. Some sanity checks. */
|
|
if (ret == -1)
|
|
log_fatal ("unexpected error from getrandom: %s\n",
|