diff options
Diffstat (limited to '')
| -rw-r--r-- | cipher/rndegd.c | 229 |
1 files changed, 0 insertions, 229 deletions
diff --git a/cipher/rndegd.c b/cipher/rndegd.c deleted file mode 100644 index 5f71ab858..000000000 --- a/cipher/rndegd.c +++ /dev/null @@ -1,229 +0,0 @@ -/* rndegd.c - interface to the EGD - * Copyright (C) 1999, 2000, 2001, 2002 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_RNDEGD - -#include <stdio.h> -#include <stdlib.h> -#include <assert.h> -#include <errno.h> -#include <sys/time.h> -#include <sys/stat.h> -#include <string.h> -#include <unistd.h> -#include <sys/types.h> -#include <sys/socket.h> -#include <sys/un.h> -#include "types.h" -#include "util.h" -#include "ttyio.h" -#include "algorithms.h" -#include "cipher.h" -#include "i18n.h" - - -#ifndef offsetof -#define offsetof(type, member) ((size_t) &((type *)0)->member) -#endif - -static int egd_socket = -1; - -static int -do_write( int fd, void *buf, size_t nbytes ) -{ - size_t nleft = nbytes; - int nwritten; - - while( nleft > 0 ) { - nwritten = write( fd, buf, nleft); - if( nwritten < 0 ) { - if( errno == EINTR ) - continue; - return -1; - } - nleft -= nwritten; - buf = (char*)buf + nwritten; - } - return 0; -} - -static int -do_read( int fd, void *buf, size_t nbytes ) -{ - int n, nread = 0; - - while (nbytes) - { - do { - n = read(fd, (char*)buf + nread, nbytes ); - } while( n == -1 && errno == EINTR ); - if( n == -1 ) - return nread? nread:-1; - else if( n == 0 ) { - /* EGD probably died. */ - errno = ECONNRESET; - return -1; - } - nread += n; - nbytes -= n; - } - return nread; -} - -/* Connect to the EGD and return the file descriptor. Return -1 on - error. With NOFAIL set to true, silently fail and return the - error, otherwise print an error message and die. */ -int -rndegd_connect_socket (int nofail) -{ - int fd; - const char *bname = NULL; - char *name; - struct sockaddr_un addr; - int addr_len; - - if (egd_socket != -1) - { - close (egd_socket); - egd_socket = -1; - } - -#ifdef EGD_SOCKET_NAME - bname = EGD_SOCKET_NAME; -#endif - if ( !bname || !*bname ) - bname = "=entropy"; - - if ( *bname == '=' && bname[1] ) - name = make_filename( g10_opt_homedir, bname+1 , NULL ); - else - name = make_filename( bname , NULL ); - - if ( strlen(name)+1 >= sizeof addr.sun_path ) - g10_log_fatal ("EGD socketname is too long\n"); - - memset( &addr, 0, sizeof addr ); - addr.sun_family = AF_UNIX; - strcpy( addr.sun_path, name ); - addr_len = (offsetof( struct sockaddr_un, sun_path ) - + strlen( addr.sun_path )); - - fd = socket(AF_UNIX, SOCK_STREAM, 0); - if (fd == -1 && !nofail) - g10_log_fatal("can't create unix domain socket: %s\n", - strerror(errno) ); - else if (connect (fd, (struct sockaddr*)&addr, addr_len) == -1) - { - if (!nofail) - g10_log_fatal("can't connect to `%s': %s\n", - name, strerror(errno) ); - close (fd); - fd = -1; - } - m_free(name); - if (fd != -1) - egd_socket = fd; - return fd; -} - - -/**************** - * Note: we always use the highest level. - * TO boost the performance we may want to add some - * additional code for level 1 - * - * Using a level of 0 should never block and better add nothing - * to the pool. So this is just a dummy for EGD. - */ -int -rndegd_gather_random( void (*add)(const void*, size_t, int), int requester, - size_t length, int level ) -{ - int fd = egd_socket; - int n; - byte buffer[256+2]; - int nbytes; - int do_restart = 0; - - if( !length ) - return 0; - if( !level ) - return 0; - - restart: - if (fd == -1 || do_restart) - fd = rndegd_connect_socket (0); - - do_restart = 0; - - nbytes = length < 255? length : 255; - /* first time we do it with a non blocking request */ - buffer[0] = 1; /* non blocking */ - buffer[1] = nbytes; - if( do_write( fd, buffer, 2 ) == -1 ) - g10_log_fatal("can't write to the EGD: %s\n", strerror(errno) ); - n = do_read( fd, buffer, 1 ); - if( n == -1 ) { - g10_log_error("read error on EGD: %s\n", strerror(errno)); - do_restart = 1; - goto restart; - } - n = buffer[0]; - if( n ) { - n = do_read( fd, buffer, n ); - if( n == -1 ) { - g10_log_error("read error on EGD: %s\n", strerror(errno)); - do_restart = 1; - goto restart; - } - (*add)( buffer, n, requester ); - length -= n; - } - - if( length ) { - tty_printf( - _("Please wait, entropy is being gathered. Do some work if it would\n" - "keep you from getting bored, because it will improve the quality\n" - "of the entropy.\n") ); - } - while( length ) { - nbytes = length < 255? length : 255; - - buffer[0] = 2; /* blocking */ - buffer[1] = nbytes; - if( do_write( fd, buffer, 2 ) == -1 ) - g10_log_fatal("can't write to the EGD: %s\n", strerror(errno) ); - n = do_read( fd, buffer, nbytes ); - if( n == -1 ) { - g10_log_error("read error on EGD: %s\n", strerror(errno)); - do_restart = 1; - goto restart; - } - (*add)( buffer, n, requester ); - length -= n; - } - memset(buffer, 0, sizeof(buffer) ); - - return 0; /* success */ -} - -#endif /*USE_RNDEGD*/ |