GNUnet is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published
- by the Free Software Foundation; either version 2, or (at your
+ by the Free Software Foundation; either version 3, or (at your
option) any later version.
GNUnet is distributed in the hope that it will be useful, but
* @author Christian Grothoff
*/
#include "platform.h"
-#include "gnunet_common.h"
-#include "gnunet_crypto_lib.h"
-#include "gnunet_os_lib.h"
+#include "gnunet_util_lib.h"
#include <gcrypt.h>
#define LOG(kind,...) GNUNET_log_from (kind, "util", __VA_ARGS__)
#define LOG_STRERROR(kind,syscall) GNUNET_log_from_strerror (kind, "util", syscall)
-/**
- * GNUNET_YES if we are using a 'weak' (low-entropy) PRNG.
- */
-static int weak_random;
-
-
-
/* TODO: ndurner, move this to plibc? */
/* The code is derived from glibc, obviously */
-#if MINGW
+#if !HAVE_RANDOM || !HAVE_SRANDOM
#ifdef RANDOM
#undef RANDOM
#endif
}
-/**
- * Check if we are using weak random number generation.
- *
- * @return GNUNET_YES if weak number generation is on
- */
-int
-GNUNET_CRYPTO_random_is_weak ()
-{
- return weak_random;
-}
-
-
-/**
- * This function should only be called in testcases
- * where strong entropy gathering is not desired
- * (for example, for hostkey generation).
- */
-void
-GNUNET_CRYPTO_random_disable_entropy_gathering ()
-{
- weak_random = GNUNET_YES;
- gcry_control (GCRYCTL_ENABLE_QUICK_RANDOM, 0);
-}
-
-
/**
* Process ID of the "find" process that we use for
* entropy gathering.
LOG (GNUNET_ERROR_TYPE_INFO, _("Starting `%s' process to generate entropy\n"),
"find");
genproc =
- GNUNET_OS_start_process (GNUNET_NO, 0,
+ GNUNET_OS_start_process (GNUNET_NO, 0,
NULL, NULL, "sh", "sh", "-c",
"exec find / -mount -type f -exec cp {} /dev/null \\; 2>/dev/null",
NULL);
}
-void __attribute__ ((constructor)) GNUNET_CRYPTO_random_init ()
+void __attribute__ ((constructor))
+GNUNET_CRYPTO_random_init ()
{
- gcry_control (GCRYCTL_DISABLE_SECMEM, 0);
- if (!gcry_check_version (NEED_LIBGCRYPT_VERSION))
+ gcry_error_t rc;
+
+ if (! gcry_check_version (NEED_LIBGCRYPT_VERSION))
{
FPRINTF (stderr,
_
NEED_LIBGCRYPT_VERSION);
GNUNET_abort ();
}
+ if ((rc = gcry_control (GCRYCTL_DISABLE_SECMEM, 0)))
+ FPRINTF (stderr, "Failed to set libgcrypt option %s: %s\n", "DISABLE_SECMEM",
+ gcry_strerror (rc));
+ /* we only generate ephemeral keys in-process; for those,
+ we are fine with "just" using GCRY_STRONG_RANDOM */
+ if ((rc = gcry_control (GCRYCTL_ENABLE_QUICK_RANDOM, 0)))
+ FPRINTF (stderr, "Failed to set libgcrypt option %s: %s\n", "ENABLE_QUICK_RANDOM",
+ gcry_strerror (rc));
+
#ifdef GCRYCTL_INITIALIZATION_FINISHED
gcry_control (GCRYCTL_INITIALIZATION_FINISHED, 0);
#endif
}
-void __attribute__ ((destructor)) GNUNET_CRYPTO_random_fini ()
+void __attribute__ ((destructor))
+GNUNET_CRYPTO_random_fini ()
{
gcry_set_progress_handler (NULL, NULL);
}