73 lines
1.8 KiB
C
73 lines
1.8 KiB
C
/* vim: tabstop=4 shiftwidth=4 noexpandtab
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* This file is part of ToaruOS and is released under the terms
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* of the NCSA / University of Illinois License - see LICENSE.md
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* Copyright (C) 2014-2018 K. Lange
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*
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* Provides access to the kernel RNG
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*
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*/
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#include <kernel/system.h>
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#include <kernel/logging.h>
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#include <kernel/fs.h>
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#include <kernel/module.h>
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static uint32_t read_random(fs_node_t *node, uint32_t offset, uint32_t size, uint8_t *buffer);
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static uint32_t write_random(fs_node_t *node, uint32_t offset, uint32_t size, uint8_t *buffer);
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static void open_random(fs_node_t *node, unsigned int flags);
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static void close_random(fs_node_t *node);
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static uint32_t read_random(fs_node_t *node, uint32_t offset, uint32_t size, uint8_t *buffer) {
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uint32_t s = 0;
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while (s < size) {
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buffer[s] = krand() % 0xFF;
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offset++;
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s++;
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}
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return size;
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}
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static uint32_t write_random(fs_node_t *node, uint32_t offset, uint32_t size, uint8_t *buffer) {
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return size;
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}
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static void open_random(fs_node_t * node, unsigned int flags) {
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return;
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}
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static void close_random(fs_node_t * node) {
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return;
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}
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static fs_node_t * random_device_create(void) {
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fs_node_t * fnode = malloc(sizeof(fs_node_t));
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memset(fnode, 0x00, sizeof(fs_node_t));
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fnode->inode = 0;
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strcpy(fnode->name, "random");
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fnode->uid = 0;
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fnode->gid = 0;
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fnode->mask = 0444;
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fnode->length = 1024;
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fnode->flags = FS_CHARDEVICE;
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fnode->read = read_random;
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fnode->write = write_random;
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fnode->open = open_random;
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fnode->close = close_random;
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fnode->readdir = NULL;
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fnode->finddir = NULL;
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fnode->ioctl = NULL;
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return fnode;
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}
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static int random_initialize(void) {
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vfs_mount("/dev/random", random_device_create());
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vfs_mount("/dev/urandom", random_device_create());
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return 0;
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}
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static int random_finalize(void) {
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return 0;
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}
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MODULE_DEF(random, random_initialize, random_finalize);
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