#include "platform.h"
#include "gnunet_common.h"
#include "gnunet_crypto_lib.h"
+#include "gnunet_os_lib.h"
#include <gmp.h>
#include <gcrypt.h>
return ksk_decode_key (line->pke);
}
+
+/**
+ * Process ID of the "find" process that we use for
+ * entropy gathering.
+ */
+static pid_t genproc;
+
+/**
+ * Function called by libgcrypt whenever we are
+ * blocked gathering entropy.
+ */
+static void
+entropy_generator (void *cls,
+ const char *what,
+ int printchar,
+ int current,
+ int total)
+{
+ unsigned long code;
+ enum GNUNET_OS_ProcessStatusType type;
+ int ret;
+
+ if (0 != strcmp (what, "need_entropy"))
+ return;
+ if (current == total)
+ {
+ if (genproc != 0)
+ {
+ PLIBC_KILL(genproc, SIGTERM);
+ GNUNET_break (GNUNET_OK == GNUNET_OS_process_wait (genproc));
+ genproc = 0;
+ }
+ return;
+ }
+ if (genproc != 0)
+ {
+ ret = GNUNET_OS_process_status (genproc,
+ &type,
+ &code);
+ if (ret == GNUNET_NO)
+ return; /* still running */
+ if (ret == GNUNET_SYSERR)
+ {
+ GNUNET_break (0);
+ return;
+ }
+ PLIBC_KILL(genproc, SIGTERM);
+ GNUNET_break (GNUNET_OK == GNUNET_OS_process_wait (genproc));
+ genproc = 0;
+ }
+ GNUNET_log(GNUNET_ERROR_TYPE_INFO,
+ _("Starting `%s' process to generate entropy\n"),
+ "find");
+ genproc = GNUNET_OS_start_process ("sh",
+ "sh",
+ "-c",
+ "exec find / -mount -type f -exec cp {} /dev/null \\; 2>/dev/null",
+ NULL);
+}
+
+
+static void
+killfind ()
+{
+ if (genproc != 0)
+ {
+ PLIBC_KILL(genproc, SIGKILL);
+ genproc = 0;
+ }
+}
+
+
void __attribute__ ((constructor)) GNUNET_CRYPTO_ksk_init ()
{
gcry_control (GCRYCTL_DISABLE_SECMEM, 0);
#ifdef gcry_fast_random_poll
gcry_fast_random_poll ();
#endif
+ gcry_set_progress_handler (&entropy_generator, NULL);
+ atexit (&killfind);
}
+
void __attribute__ ((destructor)) GNUNET_CRYPTO_ksk_fini ()
{
int i;
+
for (i = 0; i < cacheSize; i++)
{
GNUNET_free (cache[i]->pke);
GNUNET_free (cache[i]);
}
GNUNET_array_grow (cache, cacheSize, 0);
+ gcry_set_progress_handler (NULL, NULL);
}
/* end of kblockkey.c */