diff -up libgcrypt-1.8.5/random/rand-internal.h.getrandom libgcrypt-1.8.5/random/rand-internal.h
--- libgcrypt-1.8.5/random/rand-internal.h.getrandom 2017-11-23 19:16:58.000000000 +0100
+++ libgcrypt-1.8.5/random/rand-internal.h 2020-04-20 14:55:34.875949624 +0200
@@ -47,6 +47,7 @@ void _gcry_random_progress (const char *
/*-- random-csprng.c --*/
void _gcry_rngcsprng_initialize (int full);
+void _gcry_rngcsprng_deinit (void);
void _gcry_rngcsprng_close_fds (void);
void _gcry_rngcsprng_dump_stats (void);
void _gcry_rngcsprng_secure_alloc (void);
@@ -68,6 +69,7 @@ void _gcry_rngcsprng_fast_poll (void);
/*-- random-drbg.c --*/
void _gcry_rngdrbg_inititialize (int full);
+void _gcry_rngdrbg_deinit (void);
void _gcry_rngdrbg_close_fds (void);
void _gcry_rngdrbg_dump_stats (void);
int _gcry_rngdrbg_is_faked (void);
diff -up libgcrypt-1.8.5/random/random.c.getrandom libgcrypt-1.8.5/random/random.c
--- libgcrypt-1.8.5/random/random.c.getrandom 2017-11-23 19:16:58.000000000 +0100
+++ libgcrypt-1.8.5/random/random.c 2020-04-20 14:55:34.876949605 +0200
@@ -110,8 +110,8 @@ _gcry_random_read_conf (void)
unsigned int result = 0;
fp = fopen (fname, "r");
- if (!fp)
- return result;
+ if (!fp) /* We make only_urandom the default. */
+ return RANDOM_CONF_ONLY_URANDOM;
for (;;)
{
@@ -228,6 +228,22 @@ _gcry_random_initialize (int full)
}
+/* Deinitialize this random subsystem. */
+void
+_gcry_random_deinit (void)
+{
+ if (fips_mode ())
+ _gcry_rngdrbg_deinit ();
+ else if (rng_types.standard)
+ _gcry_rngcsprng_deinit ();
+ else if (rng_types.fips)
+ _gcry_rngdrbg_deinit ();
+ else
+ _gcry_rngcsprng_deinit ();
+ /* not needed for system */
+}
+
+
/* If possible close file descriptors used by the RNG. */
void
_gcry_random_close_fds (void)
diff -up libgcrypt-1.8.5/random/random-csprng.c.getrandom libgcrypt-1.8.5/random/random-csprng.c
--- libgcrypt-1.8.5/random/random-csprng.c.getrandom 2017-11-23 19:16:58.000000000 +0100
+++ libgcrypt-1.8.5/random/random-csprng.c 2020-04-20 15:04:27.182877975 +0200
@@ -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"
@@ -343,6 +347,21 @@ _gcry_rngcsprng_initialize (int full)
}
+void
+_gcry_rngcsprng_deinit (void)
+{
+ lock_pool();
+ pool_writepos = 0;
+ pool_readpos = 0;
+ pool_filled = 0;
+ pool_filled_counter = 0;
+ did_initial_extra_seeding = 0;
+ pool_balance = 0;
+ just_mixed = 0;
+ unlock_pool();
+}
+
+
/* Try to close the FDs of the random gather module. This is
currently only implemented for rndlinux. */
void
@@ -1116,6 +1135,22 @@ 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-1.8.5/random/random-drbg.c.getrandom libgcrypt-1.8.5/random/random-drbg.c
--- libgcrypt-1.8.5/random/random-drbg.c.getrandom 2017-11-23 19:16:58.000000000 +0100
+++ libgcrypt-1.8.5/random/random-drbg.c 2020-04-20 15:02:37.782947902 +0200
@@ -1811,6 +1811,22 @@ _gcry_rngdrbg_inititialize (int full)
}
/*
+ * Deinitialize the DRBG invoked by the libgcrypt API
+ * It will be automatically re-initialized on next call
+ */
+void
+_gcry_rngdrbg_deinit (void)
+{
+ drbg_lock ();
+ if (drbg_state)
+ {
+ drbg_uninstantiate (drbg_state);
+ drbg_state = NULL;
+ }
+ drbg_unlock ();
+}
+
+/*
* Backend handler function for GCRYCTL_DRBG_REINIT
*
* Select a different DRBG type and initialize it.
diff -up libgcrypt-1.8.5/random/random.h.getrandom libgcrypt-1.8.5/random/random.h
--- libgcrypt-1.8.5/random/random.h.getrandom 2017-11-23 19:16:58.000000000 +0100
+++ libgcrypt-1.8.5/random/random.h 2020-04-20 14:55:34.877949586 +0200
@@ -29,6 +29,7 @@ void _gcry_register_random_progress (voi
void _gcry_set_preferred_rng_type (int type);
void _gcry_random_initialize (int full);
+void _gcry_random_deinit (void);
void _gcry_random_close_fds (void);
int _gcry_get_rng_type (int ignore_fips_mode);
void _gcry_random_dump_stats(void);
diff -up libgcrypt-1.8.5/random/rndlinux.c.getrandom libgcrypt-1.8.5/random/rndlinux.c
--- libgcrypt-1.8.5/random/rndlinux.c.getrandom 2020-04-20 15:01:50.159848963 +0200
+++ libgcrypt-1.8.5/random/rndlinux.c 2020-04-20 16:14:21.901610921 +0200
@@ -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"
@@ -147,12 +148,12 @@ _gcry_rndlinux_gather_random (void (*add
if (!add)
{
/* Special mode to close the descriptors. */
- if (fd_random != -1)
+ if (fd_random >= 0)
{
close (fd_random);
fd_random = -1;
}
- if (fd_urandom != -1)
+ if (fd_urandom >= 0)
{
close (fd_urandom);
fd_urandom = -1;
@@ -166,12 +167,12 @@ _gcry_rndlinux_gather_random (void (*add
apid = getpid ();
if (my_pid != apid)
{
- if (fd_random != -1)
+ if (fd_random >= 0)
{
close (fd_random);
fd_random = -1;
}
- if (fd_urandom != -1)
+ if (fd_urandom >= 0)
{
close (fd_urandom);
fd_urandom = -1;
@@ -216,7 +217,23 @@ _gcry_rndlinux_gather_random (void (*add
that we always require the device to be existent but want a more
graceful behaviour if the rarely needed close operation has been
used and the device needs to be re-opened later. */
- if (level >= GCRY_VERY_STRONG_RANDOM && !only_urandom)
+#if defined(__linux__) && defined(HAVE_SYSCALL) && defined(__NR_getrandom)
+ if (fd_urandom != -2 && !_gcry_in_constructor ())
+ {
+ 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 == EAGAIN || errno == EINTR)
+ {
+ fd_urandom = -2;
+ fd_random = -2;
+ }
+ }
+#endif
+ if (level >= GCRY_VERY_STRONG_RANDOM && !only_urandom && !_gcry_in_constructor ())
{
if (fd_random == -1)
{
@@ -255,6 +272,7 @@ _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 == -2)
{
long ret;
size_t nbytes;
@@ -270,9 +288,7 @@ _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 pulling from fd. */
- else
+ if (1)
{ /* The syscall is supported. Some sanity checks. */
if (ret == -1)
log_fatal ("unexpected error from getrandom: %s\n",
diff -up libgcrypt-1.8.5/src/g10lib.h.getrandom libgcrypt-1.8.5/src/g10lib.h
--- libgcrypt-1.8.5/src/g10lib.h.getrandom 2020-04-20 15:08:16.528538580 +0200
+++ libgcrypt-1.8.5/src/g10lib.h 2020-04-20 15:08:28.641309399 +0200
@@ -464,6 +464,6 @@ gpg_err_code_t _gcry_fips_run_selftests
void _gcry_fips_noreturn (void);
#define fips_noreturn() (_gcry_fips_noreturn ())
-
+int _gcry_in_constructor (void);
#endif /* G10LIB_H */
diff -up libgcrypt-1.8.5/src/global.c.getrandom libgcrypt-1.8.5/src/global.c
--- libgcrypt-1.8.5/src/global.c.getrandom 2020-04-20 15:06:21.891707597 +0200
+++ libgcrypt-1.8.5/src/global.c 2020-04-20 15:07:29.018437509 +0200
@@ -145,10 +145,18 @@ global_init (void)
#define FIPS_MODULE_PATH "/etc/system-fips"
#endif
+static int in_constructor = 0;
+
+int _gcry_in_constructor(void)
+{
+ return in_constructor;
+}
+
void __attribute__ ((constructor)) _gcry_global_constructor (void)
{
int rv;
+ in_constructor = 1;
rv = access (FIPS_MODULE_PATH, F_OK);
if (rv < 0 && errno != ENOENT)
rv = 0;
@@ -163,10 +171,12 @@ void __attribute__ ((constructor)) _gcry
/* force selftests */
global_init();
_gcry_fips_run_selftests (0);
- if (!fips_mode())
- _gcry_random_close_fds ();
+ _gcry_random_close_fds ();
+ _gcry_random_deinit ();
no_secure_memory = no_secmem_save;
}
+
+ in_constructor = 0;
}
/* This function is called by the macro fips_is_operational and makes