77 lines
2.7 KiB
Diff
77 lines
2.7 KiB
Diff
diff -up libgcrypt-1.8.1/random/random-csprng.c.getrandom libgcrypt-1.8.1/random/random-csprng.c
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--- libgcrypt-1.8.1/random/random-csprng.c.getrandom 2017-08-27 09:05:36.000000000 +0200
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+++ libgcrypt-1.8.1/random/random-csprng.c 2017-12-05 11:49:06.609801947 +0100
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@@ -55,6 +55,10 @@
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#ifdef __MINGW32__
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#include <process.h>
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#endif
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+#if defined(__linux__) && defined(HAVE_SYSCALL)
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+# include <sys/syscall.h>
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+# include <linux/random.h>
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+#endif
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#include "g10lib.h"
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#include "random.h"
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#include "rand-internal.h"
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@@ -1116,6 +1120,22 @@ getfnc_gather_random (void))(void (*)(co
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enum random_origins, size_t, int);
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#if USE_RNDLINUX
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+#if defined(__linux__) && defined(HAVE_SYSCALL) && defined(__NR_getrandom)
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+ long ret;
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+ char buffer[1];
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+
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+ _gcry_pre_syscall ();
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+ ret = syscall (__NR_getrandom,
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+ (void*)buffer, (size_t)1, (unsigned int)GRND_NONBLOCK);
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+ _gcry_post_syscall ();
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+ if (ret != -1 || errno != ENOSYS)
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+ {
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+ fnc = _gcry_rndlinux_gather_random;
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+ return fnc;
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+ }
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+ else
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+ /* The syscall is not supported - fallback to /dev/urandom. */
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+#endif
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if ( !access (NAME_OF_DEV_RANDOM, R_OK)
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&& !access (NAME_OF_DEV_URANDOM, R_OK))
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{
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diff -up libgcrypt-1.8.1/random/rndlinux.c.getrandom libgcrypt-1.8.1/random/rndlinux.c
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--- libgcrypt-1.8.1/random/rndlinux.c.getrandom 2017-09-05 14:34:28.003872675 +0200
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+++ libgcrypt-1.8.1/random/rndlinux.c 2017-12-04 09:48:38.704845838 +0100
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@@ -35,6 +35,7 @@
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#include <poll.h>
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#if defined(__linux__) && defined(HAVE_SYSCALL)
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# include <sys/syscall.h>
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+# include <linux/random.h>
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#endif
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#include "types.h"
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@@ -204,6 +205,16 @@ _gcry_rndlinux_gather_random (void (*add
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{
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if (fd_urandom == -1)
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{
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+#if defined(__linux__) && defined(HAVE_SYSCALL) && defined(__NR_getrandom)
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+ long ret;
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+
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+ _gcry_pre_syscall ();
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+ ret = syscall (__NR_getrandom,
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+ (void*)buffer, (size_t)1, (unsigned int)GRND_NONBLOCK);
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+ _gcry_post_syscall ();
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+ if (ret == -1 && errno == ENOSYS)
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+ /* The syscall is not supported - fallback to /dev/urandom. */
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+#endif
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fd_urandom = open_device (NAME_OF_DEV_URANDOM, (ever_opened & 2));
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ever_opened |= 2;
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}
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@@ -246,9 +257,7 @@ _gcry_rndlinux_gather_random (void (*add
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_gcry_post_syscall ();
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}
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while (ret == -1 && errno == EINTR);
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- if (ret == -1 && errno == ENOSYS)
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- ; /* The syscall is not supported - fallback to /dev/urandom. */
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- else
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+ if (1)
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{ /* The syscall is supported. Some sanity checks. */
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if (ret == -1)
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log_fatal ("unexpected error from getrandom: %s\n",
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