diff options
Diffstat (limited to 'cipher/rndlinux.c')
| -rw-r--r-- | cipher/rndlinux.c | 213 |
1 files changed, 0 insertions, 213 deletions
diff --git a/cipher/rndlinux.c b/cipher/rndlinux.c deleted file mode 100644 index a1a1c294..00000000 --- a/cipher/rndlinux.c +++ /dev/null @@ -1,213 +0,0 @@ -/* rndlinux.c - raw random number for OSes with /dev/random - * 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_GETTIMEOFDAY - #include <sys/times.h> -#endif -#include <string.h> -#include <unistd.h> -#include <fcntl.h> -#include "types.h" -#include "util.h" -#include "ttyio.h" -#include "dynload.h" - -#ifdef IS_MODULE - #define _(a) (a) -#else - #include "i18n.h" -#endif - -static int open_device( const char *name, int minor ); -static int gather_random( void (*add)(const void*, size_t, int), int requester, - size_t length, int level ); - -#ifdef IS_MODULE -static void tty_printf(const char *fmt, ... ) -{ - g10_log_info("tty_printf not available (%s)\n", fmt ); -} -#endif - - - -/**************** - * 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 ) - 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) ); - #if defined(__sparc__) && defined(__linux__) - #warning something is wrong with UltraPenguin /dev/random - #else - if( !S_ISCHR(sb.st_mode) ) - g10_log_fatal("invalid random device!\n" ); - #endif - return fd; -} - - -static int -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 { - if( fd_urandom == -1 ) - fd_urandom = open_device( NAME_OF_DEV_URANDOM, 9 ); - fd = fd_urandom; - } - - 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"), 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 */ -} - - - -#ifndef IS_MODULE -static -#endif -const char * const gnupgext_version = "RNDLINUX ($Revision$)"; - -static struct { - int class; - int version; - void *func; -} func_table[] = { - { 40, 1, gather_random }, -}; - - - -/**************** - * Enumerate the names of the functions together with informations about - * this function. Set sequence to an integer with a initial value of 0 and - * do not change it. - * If what is 0 all kind of functions are returned. - * Return values: class := class of function: - * 10 = message digest algorithm info function - * 11 = integer with available md algorithms - * 20 = cipher algorithm info function - * 21 = integer with available cipher algorithms - * 30 = public key algorithm info function - * 31 = integer with available pubkey algorithms - * 40 = get gather_random function - * 41 = get fast_random_poll function - * version = interface version of the function/pointer - * (currently this is 1 for all functions) - */ - -#ifndef IS_MODULE -static -#endif -void * -gnupgext_enum_func( int what, int *sequence, int *class, int *vers ) -{ - void *ret; - int i = *sequence; - - do { - if ( i >= DIM(func_table) || i < 0 ) { - return NULL; - } - *class = func_table[i].class; - *vers = func_table[i].version; - ret = func_table[i].func; - i++; - } while ( what && what != *class ); - - *sequence = i; - return ret; -} - -#ifndef IS_MODULE -void -rndlinux_constructor(void) -{ - register_internal_cipher_extension( gnupgext_version, - gnupgext_enum_func ); -} -#endif - |