diff options
Diffstat (limited to 'cipher/rndlinux.c')
| -rw-r--r-- | cipher/rndlinux.c | 164 |
1 files changed, 0 insertions, 164 deletions
diff --git a/cipher/rndlinux.c b/cipher/rndlinux.c deleted file mode 100644 index c31b7f71c..000000000 --- a/cipher/rndlinux.c +++ /dev/null @@ -1,164 +0,0 @@ -/* rndlinux.c - raw random number for OSes with /dev/random - * Copyright (C) 1998, 1999, 2000, 2001 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> - -#ifdef USE_RNDLINUX - -#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_GETTIMEOFDAY - #include <sys/times.h> -#endif -#include <string.h> -#include <unistd.h> -#include <fcntl.h> -#if 0 - #include <sys/ioctl.h> - #include <asm/types.h> - #include <linux/random.h> -#endif -#include "types.h" -#include "util.h" -#include "ttyio.h" -#include "algorithms.h" - -#include "i18n.h" - -static int open_device( const char *name, int minor ); - - -#if 0 -#ifdef HAVE_DEV_RANDOM_IOCTL -static ulong -get_entropy_count( int fd ) -{ - ulong count; - - if( ioctl( fd, RNDGETENTCNT, &count ) == -1 ) - g10_log_fatal("ioctl(RNDGETENTCNT) failed: %s\n", strerror(errno) ); - return count; -} -#endif -#endif - -/**************** - * Used to open the /dev/random devices (Linux, xBSD, Solaris (if it exists), ...) - */ -static int -open_device( const char *name, int minor ) -{ - int fd; - struct stat sb; - - fd = open( name, O_RDONLY ); - if( fd == -1 ) - g10_log_fatal("can't open %s: %s\n", name, strerror(errno) ); - if( fstat( fd, &sb ) ) - g10_log_fatal("stat() off %s failed: %s\n", name, strerror(errno) ); - /* Don't check device type for better portability */ - /* if( (!S_ISCHR(sb.st_mode)) && (!S_ISFIFO(sb.st_mode)) ) - g10_log_fatal("invalid random device!\n" ); */ - return fd; -} - - -/**************** - * Note: Using a level of 0 should never block and better add nothing - * to the pool. This is easy to accomplish with /dev/urandom. - */ -int -rndlinux_gather_random( void (*add)(const void*, size_t, int), int requester, - size_t length, int level ) -{ - static int fd_urandom = -1; - static int fd_random = -1; - int fd; - int n; - int warn=0; - byte buffer[768]; - - if( level >= 2 ) { - if( fd_random == -1 ) - fd_random = open_device( NAME_OF_DEV_RANDOM, 8 ); - fd = fd_random; - } - else { - /* this will also be used for elve 0 but by using /dev/urandom - * we can be sure that oit will never block. */ - if( fd_urandom == -1 ) - fd_urandom = open_device( NAME_OF_DEV_URANDOM, 9 ); - fd = fd_urandom; - } - - #if 0 - #ifdef HAVE_DEV_RANDOM_IOCTL - g10_log_info("entropy count of %d is %lu\n", fd, get_entropy_count(fd) ); - #endif - #endif - while( length ) { - 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"), (int)length ); - warn = 1; - continue; - } - else if( rc == -1 ) { - tty_printf( - "select() error: %s\n", strerror(errno)); - continue; - } - - do { - int nbytes = length < sizeof(buffer)? length : sizeof(buffer); - n = read(fd, buffer, nbytes ); - if( n >= 0 && n > nbytes ) { - g10_log_error("bogus read from random device (n=%d)\n", n ); - n = nbytes; - } - } while( n == -1 && errno == EINTR ); - if( n == -1 ) - g10_log_fatal("read error on random device: %s\n", strerror(errno)); - (*add)( buffer, n, requester ); - length -= n; - } - memset(buffer, 0, sizeof(buffer) ); - - return 0; /* success */ -} - -#endif /*USE_RNDLINUX*/ |