diff options
Diffstat (limited to 'source3/modules/vfs_acl_xattr.c')
| -rw-r--r-- | source3/modules/vfs_acl_xattr.c | 239 |
1 files changed, 166 insertions, 73 deletions
diff --git a/source3/modules/vfs_acl_xattr.c b/source3/modules/vfs_acl_xattr.c index ca34e97155..2b4e68bdea 100644 --- a/source3/modules/vfs_acl_xattr.c +++ b/source3/modules/vfs_acl_xattr.c @@ -27,8 +27,11 @@ #undef DBGC_CLASS #define DBGC_CLASS DBGC_VFS +/******************************************************************* + Parse out a struct security_descriptor from a DATA_BLOB. +*******************************************************************/ + static NTSTATUS parse_acl_blob(const DATA_BLOB *pblob, - const struct timespec cts, uint32 security_info, struct security_descriptor **ppdesc) { @@ -50,31 +53,7 @@ static NTSTATUS parse_acl_blob(const DATA_BLOB *pblob, return NT_STATUS_REVISION_MISMATCH; } -#if 0 - { - struct timespec ts; - /* Arg. This doesn't work. Too many activities - * change the ctime. May have to roll back to - * version 1. - */ - /* - * Check that the ctime timestamp is ealier - * than the stored timestamp. - */ - - ts = nt_time_to_unix_timespec(&xacl.info.sd_ts->last_changed); - - if (timespec_compare(&cts, &ts) > 0) { - DEBUG(5, ("parse_acl_blob: stored ACL out of date " - "(%s > %s.\n", - timestring(ctx, cts.tv_sec), - timestring(ctx, ts.tv_sec))); - return NT_STATUS_EA_CORRUPT_ERROR; - } - } -#endif - - *ppdesc = make_sec_desc(ctx, SEC_DESC_REVISION, SEC_DESC_SELF_RELATIVE, + *ppdesc = make_sec_desc(ctx, SEC_DESC_REVISION, xacl.info.sd_ts->sd->type | SEC_DESC_SELF_RELATIVE, (security_info & OWNER_SECURITY_INFORMATION) ? xacl.info.sd_ts->sd->owner_sid : NULL, (security_info & GROUP_SECURITY_INFORMATION) @@ -90,6 +69,10 @@ static NTSTATUS parse_acl_blob(const DATA_BLOB *pblob, return (*ppdesc != NULL) ? NT_STATUS_OK : NT_STATUS_NO_MEMORY; } +/******************************************************************* + Pull a security descriptor into a DATA_BLOB from a xattr. +*******************************************************************/ + static NTSTATUS get_acl_blob(TALLOC_CTX *ctx, vfs_handle_struct *handle, files_struct *fsp, @@ -144,7 +127,11 @@ static NTSTATUS get_acl_blob(TALLOC_CTX *ctx, return NT_STATUS_OK; } -static NTSTATUS create_acl_blob(const SEC_DESC *psd, DATA_BLOB *pblob) +/******************************************************************* + Create a DATA_BLOB from a security descriptor. +*******************************************************************/ + +static NTSTATUS create_acl_blob(const struct security_descriptor *psd, DATA_BLOB *pblob) { struct xattr_NTACL xacl; struct security_descriptor_timestamp sd_ts; @@ -163,7 +150,7 @@ static NTSTATUS create_acl_blob(const SEC_DESC *psd, DATA_BLOB *pblob) xacl.version = 2; xacl.info.sd_ts = &sd_ts; - xacl.info.sd_ts->sd = CONST_DISCARD(SEC_DESC *, psd); + xacl.info.sd_ts->sd = CONST_DISCARD(struct security_descriptor *, psd); unix_timespec_to_nt_time(&xacl.info.sd_ts->last_changed, curr); DEBUG(10, ("create_acl_blob: timestamp stored as %s\n", @@ -182,7 +169,12 @@ static NTSTATUS create_acl_blob(const SEC_DESC *psd, DATA_BLOB *pblob) return NT_STATUS_OK; } -static NTSTATUS store_acl_blob_fsp(files_struct *fsp, +/******************************************************************* + Store a DATA_BLOB into an xattr given an fsp pointer. +*******************************************************************/ + +static NTSTATUS store_acl_blob_fsp(vfs_handle_struct *handle, + files_struct *fsp, DATA_BLOB *pblob) { int ret; @@ -215,10 +207,15 @@ static NTSTATUS store_acl_blob_fsp(files_struct *fsp, return NT_STATUS_OK; } -static NTSTATUS store_acl_blob_pathname(connection_struct *conn, +/******************************************************************* + Store a DATA_BLOB into an xattr given a pathname. +*******************************************************************/ + +static NTSTATUS store_acl_blob_pathname(vfs_handle_struct *handle, const char *fname, DATA_BLOB *pblob) { + connection_struct *conn = handle->conn; int ret; int saved_errno = 0; @@ -245,16 +242,18 @@ static NTSTATUS store_acl_blob_pathname(connection_struct *conn, return NT_STATUS_OK; } +/******************************************************************* + Store a DATA_BLOB into an xattr given a pathname. +*******************************************************************/ static NTSTATUS get_nt_acl_xattr_internal(vfs_handle_struct *handle, files_struct *fsp, const char *name, uint32 security_info, - SEC_DESC **ppdesc) + struct security_descriptor **ppdesc) { TALLOC_CTX *ctx = talloc_tos(); DATA_BLOB blob; - SMB_STRUCT_STAT sbuf; NTSTATUS status; if (fsp && name == NULL) { @@ -269,18 +268,7 @@ static NTSTATUS get_nt_acl_xattr_internal(vfs_handle_struct *handle, return status; } - if (fsp && fsp->fh->fd != -1) { - if (SMB_VFS_FSTAT(fsp, &sbuf) == -1) { - return map_nt_error_from_unix(errno); - } - } else { - if (SMB_VFS_STAT(handle->conn, name, &sbuf) == -1) { - return map_nt_error_from_unix(errno); - } - } - - status = parse_acl_blob(&blob, get_ctimespec(&sbuf), - security_info, ppdesc); + status = parse_acl_blob(&blob, security_info, ppdesc); if (!NT_STATUS_IS_OK(status)) { DEBUG(10, ("parse_acl_blob returned %s\n", nt_errstr(status))); @@ -292,8 +280,49 @@ static NTSTATUS get_nt_acl_xattr_internal(vfs_handle_struct *handle, } /********************************************************************* - * Currently this only works for existing files. Need to work on - * inheritance for new files. + Create a default security descriptor for a file in case no inheritance + exists. All permissions to the owner and SYSTEM. +*********************************************************************/ + +static struct security_descriptor *default_file_sd(TALLOC_CTX *mem_ctx, + SMB_STRUCT_STAT *psbuf) +{ + struct dom_sid owner_sid, group_sid; + size_t sd_size; + struct security_ace *pace = NULL; + struct security_acl *pacl = NULL; + + uid_to_sid(&owner_sid, psbuf->st_uid); + gid_to_sid(&group_sid, psbuf->st_gid); + + pace = TALLOC_ARRAY(mem_ctx, struct security_ace, 2); + if (!pace) { + return NULL; + } + + init_sec_ace(&pace[0], &owner_sid, SEC_ACE_TYPE_ACCESS_ALLOWED, + SEC_RIGHTS_FILE_ALL, 0); + init_sec_ace(&pace[1], &global_sid_System, SEC_ACE_TYPE_ACCESS_ALLOWED, + SEC_RIGHTS_FILE_ALL, 0); + + pacl = make_sec_acl(mem_ctx, + NT4_ACL_REVISION, + 2, + pace); + if (!pacl) { + return NULL; + } + return make_sec_desc(mem_ctx, + SECURITY_DESCRIPTOR_REVISION_1, + SEC_DESC_SELF_RELATIVE|SEC_DESC_DACL_PRESENT, + &owner_sid, + &group_sid, + NULL, + pacl, + &sd_size); +} + +/********************************************************************* *********************************************************************/ static NTSTATUS inherit_new_acl(vfs_handle_struct *handle, @@ -303,8 +332,8 @@ static NTSTATUS inherit_new_acl(vfs_handle_struct *handle, { TALLOC_CTX *ctx = talloc_tos(); NTSTATUS status; - SEC_DESC *parent_desc = NULL; - SEC_DESC *psd = NULL; + struct security_descriptor *parent_desc = NULL; + struct security_descriptor *psd = NULL; DATA_BLOB blob; size_t size; char *parent_name; @@ -322,35 +351,73 @@ static NTSTATUS inherit_new_acl(vfs_handle_struct *handle, status = get_nt_acl_xattr_internal(handle, NULL, parent_name, - DACL_SECURITY_INFORMATION, + (OWNER_SECURITY_INFORMATION | + GROUP_SECURITY_INFORMATION | + DACL_SECURITY_INFORMATION), &parent_desc); - if (!NT_STATUS_IS_OK(status)) { - DEBUG(10,("inherit_new_acl: directory %s failed " - "to get acl %s\n", - parent_name, - nt_errstr(status) )); - return status; - } + if (NT_STATUS_IS_OK(status)) { + /* Create an inherited descriptor from the parent. */ + + if (DEBUGLEVEL >= 10) { + DEBUG(10,("inherit_new_acl: parent acl is:\n")); + NDR_PRINT_DEBUG(security_descriptor, parent_desc); + } - /* Create an inherited descriptor from the parent. */ - status = se_create_child_secdesc(ctx, + status = se_create_child_secdesc(ctx, &psd, &size, parent_desc, &handle->conn->server_info->ptok->user_sids[PRIMARY_USER_SID_INDEX], &handle->conn->server_info->ptok->user_sids[PRIMARY_GROUP_SID_INDEX], container); - if (!NT_STATUS_IS_OK(status)) { - return status; + if (!NT_STATUS_IS_OK(status)) { + return status; + } + + if (DEBUGLEVEL >= 10) { + DEBUG(10,("inherit_new_acl: child acl is:\n")); + NDR_PRINT_DEBUG(security_descriptor, psd); + } + + } else { + DEBUG(10,("inherit_new_acl: directory %s failed " + "to get acl %s\n", + parent_name, + nt_errstr(status) )); + } + + if (!psd || psd->dacl == NULL) { + SMB_STRUCT_STAT sbuf; + int ret; + + TALLOC_FREE(psd); + if (fsp && !fsp->is_directory && fsp->fh->fd != -1) { + ret = SMB_VFS_FSTAT(fsp, &sbuf); + } else { + ret = SMB_VFS_STAT(handle->conn,fname, &sbuf); + } + if (ret == -1) { + return map_nt_error_from_unix(errno); + } + psd = default_file_sd(ctx, &sbuf); + if (!psd) { + return NT_STATUS_NO_MEMORY; + } + + if (DEBUGLEVEL >= 10) { + DEBUG(10,("inherit_new_acl: default acl is:\n")); + NDR_PRINT_DEBUG(security_descriptor, psd); + } } + status = create_acl_blob(psd, &blob); if (!NT_STATUS_IS_OK(status)) { return status; } if (fsp) { - return store_acl_blob_fsp(fsp, &blob); + return store_acl_blob_fsp(handle, fsp, &blob); } else { - return store_acl_blob_pathname(handle->conn, fname, &blob); + return store_acl_blob_pathname(handle, fname, &blob); } } @@ -365,7 +432,7 @@ static int open_acl_xattr(vfs_handle_struct *handle, mode_t mode) { uint32_t access_granted = 0; - SEC_DESC *pdesc = NULL; + struct security_descriptor *pdesc = NULL; bool file_existed = true; NTSTATUS status = get_nt_acl_xattr_internal(handle, NULL, @@ -376,11 +443,15 @@ static int open_acl_xattr(vfs_handle_struct *handle, &pdesc); if (NT_STATUS_IS_OK(status)) { /* See if we can access it. */ - status = se_access_check(pdesc, + status = smb1_file_se_access_check(pdesc, handle->conn->server_info->ptok, fsp->access_mask, &access_granted); if (!NT_STATUS_IS_OK(status)) { + DEBUG(10,("open_acl_xattr: file %s open " + "refused with error %s\n", + fname, + nt_errstr(status) )); errno = map_errno_from_nt_status(status); return -1; } @@ -416,8 +487,12 @@ static int mkdir_acl_xattr(vfs_handle_struct *handle, const char *path, mode_t m return ret; } +/********************************************************************* + Fetch a security descriptor given an fsp. +*********************************************************************/ + static NTSTATUS fget_nt_acl_xattr(vfs_handle_struct *handle, files_struct *fsp, - uint32 security_info, SEC_DESC **ppdesc) + uint32 security_info, struct security_descriptor **ppdesc) { NTSTATUS status = get_nt_acl_xattr_internal(handle, fsp, NULL, security_info, ppdesc); @@ -429,12 +504,21 @@ static NTSTATUS fget_nt_acl_xattr(vfs_handle_struct *handle, files_struct *fsp, } return NT_STATUS_OK; } + + DEBUG(10,("fget_nt_acl_xattr: failed to get xattr sd for file %s, Error %s\n", + fsp->fsp_name, + nt_errstr(status) )); + return SMB_VFS_NEXT_FGET_NT_ACL(handle, fsp, security_info, ppdesc); } +/********************************************************************* + Fetch a security descriptor given a pathname. +*********************************************************************/ + static NTSTATUS get_nt_acl_xattr(vfs_handle_struct *handle, - const char *name, uint32 security_info, SEC_DESC **ppdesc) + const char *name, uint32 security_info, struct security_descriptor **ppdesc) { NTSTATUS status = get_nt_acl_xattr_internal(handle, NULL, name, security_info, ppdesc); @@ -446,12 +530,21 @@ static NTSTATUS get_nt_acl_xattr(vfs_handle_struct *handle, } return NT_STATUS_OK; } + + DEBUG(10,("get_nt_acl_xattr: failed to get xattr sd for file %s, Error %s\n", + name, + nt_errstr(status) )); + return SMB_VFS_NEXT_GET_NT_ACL(handle, name, security_info, ppdesc); } +/********************************************************************* + Store a security descriptor given an fsp. +*********************************************************************/ + static NTSTATUS fset_nt_acl_xattr(vfs_handle_struct *handle, files_struct *fsp, - uint32 security_info_sent, const SEC_DESC *psd) + uint32 security_info_sent, const struct security_descriptor *psd) { NTSTATUS status; DATA_BLOB blob; @@ -460,7 +553,7 @@ static NTSTATUS fset_nt_acl_xattr(vfs_handle_struct *handle, files_struct *fsp, DEBUG(10,("fset_nt_acl_xattr: incoming sd for file %s\n", fsp->fsp_name)); NDR_PRINT_DEBUG(security_descriptor, - CONST_DISCARD(SEC_DESC *,psd)); + CONST_DISCARD(struct security_descriptor *,psd)); } status = SMB_VFS_NEXT_FSET_NT_ACL(handle, fsp, security_info_sent, psd); @@ -473,7 +566,7 @@ static NTSTATUS fset_nt_acl_xattr(vfs_handle_struct *handle, files_struct *fsp, int ret; SMB_STRUCT_STAT sbuf; DOM_SID owner_sid, group_sid; - SEC_DESC *nc_psd = dup_sec_desc(talloc_tos(), psd); + struct security_descriptor *nc_psd = dup_sec_desc(talloc_tos(), psd); if (!nc_psd) { return NT_STATUS_OK; @@ -502,7 +595,7 @@ static NTSTATUS fset_nt_acl_xattr(vfs_handle_struct *handle, files_struct *fsp, SE_DESC_DACL_AUTO_INHERIT_REQ))== (SE_DESC_DACL_AUTO_INHERITED| SE_DESC_DACL_AUTO_INHERIT_REQ) ) { - SEC_DESC *new_psd = NULL; + struct security_descriptor *new_psd = NULL; status = append_parent_acl(fsp, psd, &new_psd); if (!NT_STATUS_IS_OK(status)) { /* Lower level acl set succeeded, @@ -516,10 +609,10 @@ static NTSTATUS fset_nt_acl_xattr(vfs_handle_struct *handle, files_struct *fsp, DEBUG(10,("fset_nt_acl_xattr: storing xattr sd for file %s\n", fsp->fsp_name)); NDR_PRINT_DEBUG(security_descriptor, - CONST_DISCARD(SEC_DESC *,psd)); + CONST_DISCARD(struct security_descriptor *,psd)); } create_acl_blob(psd, &blob); - store_acl_blob_fsp(fsp, &blob); + store_acl_blob_fsp(handle, fsp, &blob); return NT_STATUS_OK; } @@ -537,7 +630,7 @@ static vfs_op_tuple skel_op_tuples[] = {SMB_VFS_OP(get_nt_acl_xattr), SMB_VFS_OP_GET_NT_ACL, SMB_VFS_LAYER_TRANSPARENT}, {SMB_VFS_OP(fset_nt_acl_xattr),SMB_VFS_OP_FSET_NT_ACL,SMB_VFS_LAYER_TRANSPARENT}, - {SMB_VFS_OP(NULL), SMB_VFS_OP_NOOP, SMB_VFS_LAYER_NOOP} + {SMB_VFS_OP(NULL), SMB_VFS_OP_NOOP, SMB_VFS_LAYER_NOOP} }; NTSTATUS vfs_acl_xattr_init(void) |