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| -rw-r--r-- | source3/modules/vfs_extd_audit.c | 318 |
1 files changed, 318 insertions, 0 deletions
diff --git a/source3/modules/vfs_extd_audit.c b/source3/modules/vfs_extd_audit.c new file mode 100644 index 0000000000..f807eb830f --- /dev/null +++ b/source3/modules/vfs_extd_audit.c @@ -0,0 +1,318 @@ +/* + * Auditing VFS module for samba. Log selected file operations to syslog + * facility. + * + * Copyright (C) Tim Potter, 1999-2000 + * Copyright (C) Alexander Bokovoy, 2002 + * + * 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 */ + +static int audit_connect(struct connection_struct *conn, const char *svc, const char *user); +static void audit_disconnect(struct connection_struct *conn); +static DIR *audit_opendir(struct connection_struct *conn, const char *fname); +static int audit_mkdir(struct connection_struct *conn, const char *path, mode_t mode); +static int audit_rmdir(struct connection_struct *conn, const char *path); +static int audit_open(struct connection_struct *conn, const char *fname, int flags, mode_t mode); +static int audit_close(struct files_struct *fsp, int fd); +static int audit_rename(struct connection_struct *conn, const char *old, const char *new); +static int audit_unlink(struct connection_struct *conn, const char *path); +static int audit_chmod(struct connection_struct *conn, const char *path, mode_t mode); +static int audit_chmod_acl(struct connection_struct *conn, const char *name, mode_t mode); +static int audit_fchmod(struct files_struct *fsp, int fd, mode_t mode); +static int audit_fchmod_acl(struct files_struct *fsp, int fd, mode_t mode); + +/* VFS operations */ + +static struct vfs_ops default_vfs_ops; /* For passthrough operation */ +static struct smb_vfs_handle_struct *audit_handle; + +static vfs_op_tuple audit_ops[] = { + + /* Disk operations */ + + {audit_connect, SMB_VFS_OP_CONNECT, SMB_VFS_LAYER_LOGGER}, + {audit_disconnect, SMB_VFS_OP_DISCONNECT, SMB_VFS_LAYER_LOGGER}, + + /* Directory operations */ + + {audit_opendir, SMB_VFS_OP_OPENDIR, SMB_VFS_LAYER_LOGGER}, + {audit_mkdir, SMB_VFS_OP_MKDIR, SMB_VFS_LAYER_LOGGER}, + {audit_rmdir, SMB_VFS_OP_RMDIR, SMB_VFS_LAYER_LOGGER}, + + /* File operations */ + + {audit_open, SMB_VFS_OP_OPEN, SMB_VFS_LAYER_LOGGER}, + {audit_close, SMB_VFS_OP_CLOSE, SMB_VFS_LAYER_LOGGER}, + {audit_rename, SMB_VFS_OP_RENAME, SMB_VFS_LAYER_LOGGER}, + {audit_unlink, SMB_VFS_OP_UNLINK, SMB_VFS_LAYER_LOGGER}, + {audit_chmod, SMB_VFS_OP_CHMOD, SMB_VFS_LAYER_LOGGER}, + {audit_fchmod, SMB_VFS_OP_FCHMOD, SMB_VFS_LAYER_LOGGER}, + {audit_chmod_acl, SMB_VFS_OP_CHMOD_ACL, SMB_VFS_LAYER_LOGGER}, + {audit_fchmod_acl, SMB_VFS_OP_FCHMOD_ACL, SMB_VFS_LAYER_LOGGER}, + + /* Finish VFS operations definition */ + + {NULL, SMB_VFS_OP_NOOP, SMB_VFS_LAYER_NOOP} +}; + +/* VFS initialisation function. Return vfs_op_tuple array back to SAMBA. */ + +vfs_op_tuple *vfs_init(int *vfs_version, struct vfs_ops *def_vfs_ops, + struct smb_vfs_handle_struct *vfs_handle) +{ + *vfs_version = SMB_VFS_INTERFACE_VERSION; + memcpy(&default_vfs_ops, def_vfs_ops, sizeof(struct vfs_ops)); + + audit_handle = vfs_handle; + + openlog("smbd_audit", LOG_PID, SYSLOG_FACILITY); + syslog(SYSLOG_PRIORITY, "VFS_INIT: vfs_ops loaded\n"); + + return audit_ops; +} + +/* VFS finalization function. */ + +void vfs_done(connection_struct *conn) +{ + syslog(SYSLOG_PRIORITY, "VFS_DONE: vfs module unloaded\n"); +} + +/* Implementation of vfs_ops. Pass everything on to the default + operation but log event first. */ + +static 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); + DEBUG(10, ("Connected to service %s as user %s\n", + svc, user)); + + return default_vfs_ops.connect(conn, svc, user); +} + +static void audit_disconnect(struct connection_struct *conn) +{ + syslog(SYSLOG_PRIORITY, "disconnected\n"); + DEBUG(10, ("Disconnected from VFS module extd_audit\n")); + + default_vfs_ops.disconnect(conn); +} + +static 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) : ""); + DEBUG(1, ("vfs_extd_audit: opendir %s %s %s", + fname, + (result == NULL) ? "failed: " : "", + (result == NULL) ? strerror(errno) : "")); + + return result; +} + +static 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) : ""); + DEBUG(0, ("vfs_extd_audit: mkdir %s %s %s\n", + path, + (result < 0) ? "failed: " : "", + (result < 0) ? strerror(errno) : "")); + + return result; +} + +static 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) : ""); + DEBUG(0, ("vfs_extd_audit: rmdir %s %s %s\n", + path, + (result < 0) ? "failed: " : "", + (result < 0) ? strerror(errno) : "")); + + return result; +} + +static 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) : ""); + DEBUG(2, ("vfs_extd_audit: open %s %s %s\n", + fname, + (result < 0) ? "failed: " : "", + (result < 0) ? strerror(errno) : "")); + + return result; +} + +static 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) : ""); + DEBUG(2, ("vfs_extd_audit: close fd %d %s %s\n", + fd, + (result < 0) ? "failed: " : "", + (result < 0) ? strerror(errno) : "")); + + return result; +} + +static 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) : ""); + DEBUG(1, ("vfs_extd_audit: rename old: %s new: %s %s %s\n", + old, new, + (result < 0) ? "failed: " : "", + (result < 0) ? strerror(errno) : "")); + + return result; +} + +static 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) : ""); + DEBUG(0, ("vfs_extd_audit: unlink %s %s %s\n", + path, + (result < 0) ? "failed: " : "", + (result < 0) ? strerror(errno) : "")); + + return result; +} + +static 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) : ""); + DEBUG(1, ("vfs_extd_audit: chmod %s mode 0x%x %s %s\n", + path, mode, + (result < 0) ? "failed: " : "", + (result < 0) ? strerror(errno) : "")); + + return result; +} + +static 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) : ""); + DEBUG(1, ("vfs_extd_audit: chmod_acl %s mode 0x%x %s %s\n", + path, mode, + (result < 0) ? "failed: " : "", + (result < 0) ? strerror(errno) : "")); + + return result; +} + +static 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) : ""); + DEBUG(1, ("vfs_extd_audit: fchmod %s mode 0x%x %s %s", + fsp->fsp_name, mode, + (result < 0) ? "failed: " : "", + (result < 0) ? strerror(errno) : "")); + + return result; +} + +static 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) : ""); + DEBUG(1, ("vfs_extd_audit: fchmod_acl %s mode 0x%x %s %s", + fsp->fsp_name, mode, + (result < 0) ? "failed: " : "", + (result < 0) ? strerror(errno) : "")); + + return result; +} |