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author | Werner Koch <[email protected]> | 1998-11-25 11:52:41 +0000 |
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committer | Werner Koch <[email protected]> | 1998-11-25 11:52:41 +0000 |
commit | 2e494682b63e9f7abc2a34711618f4ebd21e2744 (patch) | |
tree | e8afb0e10b4657a3d841ff9cb02a752698c19f97 /cipher/rand-unix.c | |
parent | Ready for version 0.4.4 (diff) | |
download | gnupg-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.c | 197 |
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 */ |