/* vim: tabstop=4 shiftwidth=4 noexpandtab * Provides access to the kernel RNG */ #include #include #include #include static uint32_t read_random(fs_node_t *node, uint32_t offset, uint32_t size, uint8_t *buffer); static uint32_t write_random(fs_node_t *node, uint32_t offset, uint32_t size, uint8_t *buffer); static void open_random(fs_node_t *node, unsigned int flags); static void close_random(fs_node_t *node); static uint32_t read_random(fs_node_t *node, uint32_t offset, uint32_t size, uint8_t *buffer) { uint32_t s = 0; while (s < size) { buffer[s] = krand() % 0xFF; offset++; s++; } return size; } static uint32_t write_random(fs_node_t *node, uint32_t offset, uint32_t size, uint8_t *buffer) { return size; } static void open_random(fs_node_t * node, unsigned int flags) { return; } static void close_random(fs_node_t * node) { return; } static fs_node_t * random_device_create(void) { fs_node_t * fnode = malloc(sizeof(fs_node_t)); memset(fnode, 0x00, sizeof(fs_node_t)); fnode->inode = 0; strcpy(fnode->name, "random"); fnode->uid = 0; fnode->gid = 0; fnode->length = 1024; fnode->flags = FS_CHARDEVICE; fnode->read = read_random; fnode->write = write_random; fnode->open = open_random; fnode->close = close_random; fnode->readdir = NULL; fnode->finddir = NULL; fnode->ioctl = NULL; return fnode; } static int random_initialize(void) { vfs_mount("/dev/random", random_device_create()); return 0; } static int random_finalize(void) { return 0; } MODULE_DEF(random, random_initialize, random_finalize);