diff options
Diffstat (limited to 'qemu/roms/ipxe/src/interface/linux/linux_entropy.c')
-rw-r--r-- | qemu/roms/ipxe/src/interface/linux/linux_entropy.c | 101 |
1 files changed, 0 insertions, 101 deletions
diff --git a/qemu/roms/ipxe/src/interface/linux/linux_entropy.c b/qemu/roms/ipxe/src/interface/linux/linux_entropy.c deleted file mode 100644 index 0f8e45d36..000000000 --- a/qemu/roms/ipxe/src/interface/linux/linux_entropy.c +++ /dev/null @@ -1,101 +0,0 @@ -/* - * Copyright (C) 2012 Michael Brown <mbrown@fensystems.co.uk>. - * - * This program 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 any later version. - * - * This program 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., 51 Franklin Street, Fifth Floor, Boston, MA - * 02110-1301, USA. - * - * You can also choose to distribute this program under the terms of - * the Unmodified Binary Distribution Licence (as given in the file - * COPYING.UBDL), provided that you have satisfied its requirements. - */ - -FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL ); - -/** @file - * - * Linux entropy source - * - */ - -#include <stdint.h> -#include <errno.h> -#include <linux_api.h> -#include <ipxe/entropy.h> - -/** Entropy source filename */ -static const char entropy_filename[] = "/dev/random"; - -/** Entropy source file handle */ -static int entropy_fd; - -/** - * Enable entropy gathering - * - * @ret rc Return status code - */ -static int linux_entropy_enable ( void ) { - - /* Open entropy source */ - entropy_fd = linux_open ( entropy_filename, O_RDONLY ); - if ( entropy_fd < 0 ) { - DBGC ( &entropy_fd, "ENTROPY could not open %s: %s\n", - entropy_filename, linux_strerror ( linux_errno ) ); - return entropy_fd; - } - - return 0; -} - -/** - * Disable entropy gathering - * - */ -static void linux_entropy_disable ( void ) { - - /* Close entropy source */ - linux_close ( entropy_fd ); -} - -/** - * Get noise sample - * - * @ret noise Noise sample - * @ret rc Return status code - */ -static int linux_get_noise ( noise_sample_t *noise ) { - uint8_t byte; - ssize_t len; - - /* Read a single byte from entropy source */ - len = linux_read ( entropy_fd, &byte, sizeof ( byte ) ); - if ( len < 0 ) { - DBGC ( &entropy_fd, "ENTROPY could not read from %s: %s\n", - entropy_filename, linux_strerror ( linux_errno ) ); - return len; - } - if ( len == 0 ) { - DBGC ( &entropy_fd, "ENTROPY EOF on reading from %s: %s\n", - entropy_filename, linux_strerror ( linux_errno ) ); - return -EPIPE; - } - *noise = byte; - - return 0; -} - -PROVIDE_ENTROPY_INLINE ( linux, min_entropy_per_sample ); -PROVIDE_ENTROPY ( linux, entropy_enable, linux_entropy_enable ); -PROVIDE_ENTROPY ( linux, entropy_disable, linux_entropy_disable ); -PROVIDE_ENTROPY ( linux, get_noise, linux_get_noise ); |