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Diffstat (limited to 'examples/VFS/audit.c')
| -rw-r--r-- | examples/VFS/audit.c | 322 |
1 files changed, 322 insertions, 0 deletions
diff --git a/examples/VFS/audit.c b/examples/VFS/audit.c new file mode 100644 index 0000000000..aad483c295 --- /dev/null +++ b/examples/VFS/audit.c @@ -0,0 +1,322 @@ +/* + * Auditing VFS module for samba. Log selected file operations to syslog + * facility. + * + * Copyright (C) Tim Potter, 1999-2000 + * + * 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 + * (at your option) 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., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +#include "config.h" +#include <stdio.h> +#include <sys/stat.h> +#ifdef HAVE_UTIME_H +#include <utime.h> +#endif +#ifdef HAVE_DIRENT_H +#include <dirent.h> +#endif +#include <syslog.h> +#ifdef HAVE_FCNTL_H +#include <fcntl.h> +#endif +#include <errno.h> +#include <string.h> +#include <includes.h> +#include <vfs.h> + +#ifndef SYSLOG_FACILITY +#define SYSLOG_FACILITY LOG_USER +#endif + +#ifndef SYSLOG_PRIORITY +#define SYSLOG_PRIORITY LOG_NOTICE +#endif + +/* Function prototypes */ + +int audit_connect(struct connection_struct *conn, const char *svc, const char *user); +void audit_disconnect(struct connection_struct *conn); +DIR *audit_opendir(struct connection_struct *conn, const char *fname); +int audit_mkdir(struct connection_struct *conn, const char *path, mode_t mode); +int audit_rmdir(struct connection_struct *conn, const char *path); +int audit_open(struct connection_struct *conn, const char *fname, int flags, mode_t mode); +int audit_close(struct files_struct *fsp, int fd); +int audit_rename(struct connection_struct *conn, const char *old, const char *new); +int audit_unlink(struct connection_struct *conn, const char *path); +int audit_chmod(struct connection_struct *conn, const char *path, mode_t mode); +int audit_chmod_acl(struct connection_struct *conn, const char *name, mode_t mode); +int audit_fchmod(struct files_struct *fsp, int fd, mode_t mode); +int audit_fchmod_acl(struct files_struct *fsp, int fd, mode_t mode); + +/* VFS operations */ + +extern struct vfs_ops default_vfs_ops; /* For passthrough operation */ + +struct vfs_ops audit_ops = { + + /* Disk operations */ + + audit_connect, + audit_disconnect, + NULL, /* disk free */ + + /* Directory operations */ + + audit_opendir, + NULL, /* readdir */ + audit_mkdir, + audit_rmdir, + NULL, /* closedir */ + + /* File operations */ + + audit_open, + audit_close, + NULL, /* read */ + NULL, /* write */ + NULL, /* lseek */ + audit_rename, + NULL, /* fsync */ + NULL, /* stat */ + NULL, /* fstat */ + NULL, /* lstat */ + audit_unlink, + audit_chmod, + audit_fchmod, + NULL, /* chown */ + NULL, /* fchown */ + NULL, /* chdir */ + NULL, /* getwd */ + NULL, /* utime */ + NULL, /* ftruncate */ + NULL, /* lock */ + NULL, /* symlink */ + NULL, /* readlink */ + NULL, /* link */ + NULL, /* mknod */ + NULL, /* realpath */ + NULL, /* fget_nt_acl */ + NULL, /* get_nt_acl */ + NULL, /* fset_nt_acl */ + NULL, /* set_nt_acl */ + + audit_chmod_acl, /* chmod_acl */ + audit_fchmod_acl, /* fchmod_acl */ + + NULL, /* sys_acl_get_entry */ + NULL, /* sys_acl_get_tag_type */ + NULL, /* sys_acl_get_permset */ + NULL, /*sys_acl_get_qualifier */ + NULL, /* sys_acl_get_file */ + NULL, /* sys_acl_get_fd */ + NULL, /* sys_acl_clear_perms */ + NULL, /* sys_acl_add_perm */ + NULL, /* sys_acl_to_text */ + NULL, /* sys_acl_init */ + NULL, /* sys_acl_create_entry */ + NULL, /* sys_acl_set_tag_type */ + NULL, /* sys_acl_set_qualifier */ + NULL, /* sys_acl_set_permset */ + NULL, /* sys_acl_valid */ + NULL, /* sys_acl_set_file */ + NULL, /* sys_acl_set_fd */ + NULL, /* sys_acl_delete_def_file */ + NULL, /* sys_acl_get_perm */ + NULL, /* sys_acl_free_text */ + NULL, /* sys_acl_free_acl */ + NULL /* sys_acl_free_qualifier */ +}; + +/* VFS initialisation function. Return initialised vfs_ops structure + back to SAMBA. */ + +struct vfs_ops *vfs_init(int *vfs_version, struct vfs_ops *def_vfs_ops) +{ + struct vfs_ops tmp_ops; + + *vfs_version = SMB_VFS_INTERFACE_VERSION; + memcpy(&tmp_ops, def_vfs_ops, sizeof(struct vfs_ops)); + + tmp_ops.connect = audit_connect; + tmp_ops.disconnect = audit_disconnect; + tmp_ops.opendir = audit_opendir; + tmp_ops.mkdir = audit_mkdir; + tmp_ops.rmdir = audit_rmdir; + tmp_ops.open = audit_open; + tmp_ops.close = audit_close; + tmp_ops.rename = audit_rename; + tmp_ops.unlink = audit_unlink; + tmp_ops.chmod = audit_chmod; + tmp_ops.chmod_acl = audit_chmod_acl; + tmp_ops.fchmod = audit_fchmod; + tmp_ops.fchmod_acl = audit_fchmod_acl; + + memcpy(&audit_ops, &tmp_ops, sizeof(struct vfs_ops)); + + openlog("smbd_audit", LOG_PID, SYSLOG_FACILITY); + syslog(SYSLOG_PRIORITY, "VFS_INIT: vfs_ops loaded\n"); + return &audit_ops; +} + +/* Implementation of vfs_ops. Pass everything on to the default + operation but log event first. */ + +int audit_connect(struct connection_struct *conn, const char *svc, const char *user) +{ + syslog(SYSLOG_PRIORITY, "connect to service %s by user %s\n", + svc, user); + + return default_vfs_ops.connect(conn, svc, user); +} + +void audit_disconnect(struct connection_struct *conn) +{ + syslog(SYSLOG_PRIORITY, "disconnected\n"); + default_vfs_ops.disconnect(conn); +} + +DIR *audit_opendir(struct connection_struct *conn, const char *fname) +{ + DIR *result = default_vfs_ops.opendir(conn, fname); + + syslog(SYSLOG_PRIORITY, "opendir %s %s%s\n", + fname, + (result == NULL) ? "failed: " : "", + (result == NULL) ? strerror(errno) : ""); + + return result; +} + +int audit_mkdir(struct connection_struct *conn, const char *path, mode_t mode) +{ + int result = default_vfs_ops.mkdir(conn, path, mode); + + syslog(SYSLOG_PRIORITY, "mkdir %s %s%s\n", + path, + (result < 0) ? "failed: " : "", + (result < 0) ? strerror(errno) : ""); + + return result; +} + +int audit_rmdir(struct connection_struct *conn, const char *path) +{ + int result = default_vfs_ops.rmdir(conn, path); + + syslog(SYSLOG_PRIORITY, "rmdir %s %s%s\n", + path, + (result < 0) ? "failed: " : "", + (result < 0) ? strerror(errno) : ""); + + return result; +} + +int audit_open(struct connection_struct *conn, const char *fname, int flags, mode_t mode) +{ + int result = default_vfs_ops.open(conn, fname, flags, mode); + + syslog(SYSLOG_PRIORITY, "open %s (fd %d) %s%s%s\n", + fname, result, + ((flags & O_WRONLY) || (flags & O_RDWR)) ? "for writing " : "", + (result < 0) ? "failed: " : "", + (result < 0) ? strerror(errno) : ""); + + return result; +} + +int audit_close(struct files_struct *fsp, int fd) +{ + int result = default_vfs_ops.close(fsp, fd); + + syslog(SYSLOG_PRIORITY, "close fd %d %s%s\n", + fd, + (result < 0) ? "failed: " : "", + (result < 0) ? strerror(errno) : ""); + + return result; +} + +int audit_rename(struct connection_struct *conn, const char *old, const char *new) +{ + int result = default_vfs_ops.rename(conn, old, new); + + syslog(SYSLOG_PRIORITY, "rename %s -> %s %s%s\n", + old, new, + (result < 0) ? "failed: " : "", + (result < 0) ? strerror(errno) : ""); + + return result; +} + +int audit_unlink(struct connection_struct *conn, const char *path) +{ + int result = default_vfs_ops.unlink(conn, path); + + syslog(SYSLOG_PRIORITY, "unlink %s %s%s\n", + path, + (result < 0) ? "failed: " : "", + (result < 0) ? strerror(errno) : ""); + + return result; +} + +int audit_chmod(struct connection_struct *conn, const char *path, mode_t mode) +{ + int result = default_vfs_ops.chmod(conn, path, mode); + + syslog(SYSLOG_PRIORITY, "chmod %s mode 0x%x %s%s\n", + path, mode, + (result < 0) ? "failed: " : "", + (result < 0) ? strerror(errno) : ""); + + return result; +} + +int audit_chmod_acl(struct connection_struct *conn, const char *path, mode_t mode) +{ + int result = default_vfs_ops.chmod_acl(conn, path, mode); + + syslog(SYSLOG_PRIORITY, "chmod_acl %s mode 0x%x %s%s\n", + path, mode, + (result < 0) ? "failed: " : "", + (result < 0) ? strerror(errno) : ""); + + return result; +} + +int audit_fchmod(struct files_struct *fsp, int fd, mode_t mode) +{ + int result = default_vfs_ops.fchmod(fsp, fd, mode); + + syslog(SYSLOG_PRIORITY, "fchmod %s mode 0x%x %s%s\n", + fsp->fsp_name, mode, + (result < 0) ? "failed: " : "", + (result < 0) ? strerror(errno) : ""); + + return result; +} + +int audit_fchmod_acl(struct files_struct *fsp, int fd, mode_t mode) +{ + int result = default_vfs_ops.fchmod_acl(fsp, fd, mode); + + syslog(SYSLOG_PRIORITY, "fchmod_acl %s mode 0x%x %s%s\n", + fsp->fsp_name, mode, + (result < 0) ? "failed: " : "", + (result < 0) ? strerror(errno) : ""); + + return result; +} |