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authorWerner Koch <[email protected]>1998-11-25 11:52:41 +0000
committerWerner Koch <[email protected]>1998-11-25 11:52:41 +0000
commit2e494682b63e9f7abc2a34711618f4ebd21e2744 (patch)
treee8afb0e10b4657a3d841ff9cb02a752698c19f97 /cipher/rand-unix.c
parentReady for version 0.4.4 (diff)
downloadgnupg-2e494682b63e9f7abc2a34711618f4ebd21e2744.tar.gz
gnupg-2e494682b63e9f7abc2a34711618f4ebd21e2744.zip
Restructured the RNG source and add support for loadable
random modules.
Diffstat (limited to 'cipher/rand-unix.c')
-rw-r--r--cipher/rand-unix.c197
1 files changed, 0 insertions, 197 deletions
diff --git a/cipher/rand-unix.c b/cipher/rand-unix.c
deleted file mode 100644
index d256fd20b..000000000
--- a/cipher/rand-unix.c
+++ /dev/null
@@ -1,197 +0,0 @@
-/* rand-unix.c - raw random number generator for unix like OSes
- * Copyright (C) 1998 Free Software Foundation, Inc.
- *
- * This file is part of GNUPG.
- *
- * GNUPG 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 of the License, or
- * (at your option) any later version.
- *
- * GNUPG is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
- */
-
-
-#include <config.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <assert.h>
-#include <errno.h>
-#include <sys/time.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-#ifdef HAVE_GETHRTIME
- #include <sys/times.h>
-#endif
-#ifdef HAVE_GETTIMEOFDAY
- #include <sys/times.h>
-#endif
-#ifdef HAVE_GETRUSAGE
- #include <sys/resource.h>
-#endif
-#include <string.h>
-#include <unistd.h>
-#include <fcntl.h>
-#include "util.h"
-#include "rmd.h"
-#include "ttyio.h"
-#include "i18n.h"
-#include "rand-internal.h"
-#ifdef USE_RAND_UNIX /* This file is only for real systems */
-
-
-void
-random_poll()
-{
- char buf[POOLSIZE/5];
- read_random_source( buf, POOLSIZE/5, 1 ); /* read /dev/urandom */
- add_randomness( buf, POOLSIZE/5, 2);
- memset( buf, 0, POOLSIZE/5);
-}
-
-
-void
-fast_random_poll()
-{
- #if HAVE_GETHRTIME
- { hrtime_t tv;
- tv = gethrtime();
- add_randomness( &tv, sizeof(tv), 1 );
- }
- #elif HAVE_GETTIMEOFDAY
- { struct timeval tv;
- if( gettimeofday( &tv, NULL ) )
- BUG();
- add_randomness( &tv.tv_sec, sizeof(tv.tv_sec), 1 );
- add_randomness( &tv.tv_usec, sizeof(tv.tv_usec), 1 );
- }
- #else /* use times */
- { struct tms buf;
- times( &buf );
- add_randomness( &buf, sizeof buf, 1 );
- }
- #endif
- #ifdef HAVE_GETRUSAGE
- { struct rusage buf;
- if( getrusage( RUSAGE_SELF, &buf ) )
- BUG();
- add_randomness( &buf, sizeof buf, 1 );
- memset( &buf, 0, sizeof buf );
- }
- #endif
-}
-
-
-#ifdef HAVE_DEV_RANDOM /* we have the /dev/random devices */
-
-/****************
- * Used to open the Linux and xBSD /dev/random devices
- */
-static int
-open_device( const char *name, int minor )
-{
- int fd;
- struct stat sb;
-
- fd = open( name, O_RDONLY );
- if( fd == -1 )
- log_fatal("can't open %s: %s\n", name, strerror(errno) );
- if( fstat( fd, &sb ) )
- log_fatal("stat() off %s failed: %s\n", name, strerror(errno) );
- #if defined(__sparc__) && defined(__linux__)
- #warning something is wrong with UltraPenguin /dev/random
- #else
- if( !S_ISCHR(sb.st_mode) )
- log_fatal("invalid random device!\n" );
- #endif
- return fd;
-}
-
-
-void
-read_random_source( byte *buffer, size_t length, int level )
-{
- static int fd_urandom = -1;
- static int fd_random = -1;
- int fd;
- int n;
- int warn=0;
-
- if( level >= 2 ) {
- if( fd_random == -1 )
- fd_random = open_device( NAME_OF_DEV_RANDOM, 8 );
- fd = fd_random;
- }
- else {
- if( fd_urandom == -1 )
- fd_urandom = open_device( NAME_OF_DEV_URANDOM, 9 );
- fd = fd_urandom;
- }
- do {
- fd_set rfds;
- struct timeval tv;
- int rc;
-
- FD_ZERO(&rfds);
- FD_SET(fd, &rfds);
- tv.tv_sec = 3;
- tv.tv_usec = 0;
- if( !(rc=select(fd+1, &rfds, NULL, NULL, &tv)) ) {
- if( !warn )
- tty_printf( _(
-"\n"
-"Not enough random bytes available. Please do some other work to give\n"
-"the OS a chance to collect more entropy! (Need %d more bytes)\n"), length );
- warn = 1;
- continue;
- }
- else if( rc == -1 ) {
- tty_printf("select() error: %s\n", strerror(errno));
- continue;
- }
-
- do {
- n = read(fd, buffer, length );
- if( n >= 0 && n > length ) {
- log_error("bogus read from random device (n=%d)\n", n );
- n = length;
- }
- } while( n == -1 && errno == EINTR );
- if( n == -1 )
- log_fatal("read error on random device: %s\n", strerror(errno) );
- assert( n <= length );
- buffer += n;
- length -= n;
- } while( length );
-}
-
-#else /* not HAVE_DEV_RANDOM */
-
-
-/****************
- * The real random data collector for Unix.
- * this function runs in a loop, waiting for commands from ctrl_fd
- * and normally starts a collection process, which outputs random
- * bytes to out_fd.
- *
- * Commands understand from ctrl_fd are single character:
- * 'Q' = Quit the loop
- * 'S' = Start a new collection process
- */
-static void
-collector( FILE *ctrlfp, FILE *outfp )
-{
-
-
-
-}
-
-#endif /* no HAVE_DEV_RANDOM */
-#endif /* USE_RAND_UNIX */