diff options
Diffstat (limited to 'source4/auth/unix_token.c')
| -rw-r--r-- | source4/auth/unix_token.c | 228 |
1 files changed, 228 insertions, 0 deletions
diff --git a/source4/auth/unix_token.c b/source4/auth/unix_token.c new file mode 100644 index 0000000..b3396b8 --- /dev/null +++ b/source4/auth/unix_token.c @@ -0,0 +1,228 @@ +/* + Unix SMB/CIFS implementation. + + Deal with unix elements in the security token + + Copyright (C) Andrew Tridgell 2004 + Copyright (C) Andrew Bartlett 2011 + + 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 3 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, see <http://www.gnu.org/licenses/>. +*/ + +#include "includes.h" +#include "auth/auth.h" +#include "libcli/wbclient/wbclient.h" +#include "param/param.h" + +#undef DBGC_CLASS +#define DBGC_CLASS DBGC_AUTH + +/* + form a security_unix_token from the current security_token +*/ +NTSTATUS security_token_to_unix_token(TALLOC_CTX *mem_ctx, + struct security_token *token, + struct security_unix_token **sec) +{ + uint32_t s, g; + NTSTATUS status; + struct id_map *ids; + bool match; + + match = security_token_is_system(token); + if (match) { + /* + * SYSTEM user uid and gid is 0 + */ + + *sec = talloc_zero(mem_ctx, struct security_unix_token); + if (*sec == NULL) { + return NT_STATUS_NO_MEMORY; + } + + return NT_STATUS_OK; + } + + /* we can't do unix security without a user and group */ + if (token->num_sids < 2) { + return NT_STATUS_ACCESS_DENIED; + } + + *sec = talloc_zero(mem_ctx, struct security_unix_token); + if (*sec == NULL) { + return NT_STATUS_NO_MEMORY; + } + + ids = talloc_zero_array(mem_ctx, struct id_map, token->num_sids); + NT_STATUS_HAVE_NO_MEMORY(ids); + + for (s=0; s < token->num_sids; s++) { + ids[s].sid = &token->sids[s]; + ids[s].status = ID_UNKNOWN; + } + + status = wbc_sids_to_xids(ids, token->num_sids); + NT_STATUS_NOT_OK_RETURN(status); + + g = token->num_sids; + if (ids[0].xid.type != ID_TYPE_BOTH) { + g--; + } + (*sec)->ngroups = g; + (*sec)->groups = talloc_array(*sec, gid_t, (*sec)->ngroups); + NT_STATUS_HAVE_NO_MEMORY((*sec)->groups); + + g=0; + if (ids[0].xid.type == ID_TYPE_BOTH) { + (*sec)->uid = ids[0].xid.id; + (*sec)->groups[g] = ids[0].xid.id; + g++; + } else if (ids[0].xid.type == ID_TYPE_UID) { + (*sec)->uid = ids[0].xid.id; + } else { + struct dom_sid_buf buf; + DEBUG(0, ("Unable to convert first SID (%s) in user token to a UID. Conversion was returned as type %d, full token:\n", + dom_sid_str_buf(ids[0].sid, &buf), + (int)ids[0].xid.type)); + security_token_debug(DBGC_AUTH, 0, token); + return NT_STATUS_INVALID_SID; + } + + if (ids[1].xid.type == ID_TYPE_BOTH || + ids[1].xid.type == ID_TYPE_GID) { + (*sec)->gid = ids[1].xid.id; + (*sec)->groups[g] = ids[1].xid.id; + g++; + } else { + struct dom_sid_buf buf; + DEBUG(0, ("Unable to convert second SID (%s) in user token to a GID. Conversion was returned as type %d, full token:\n", + dom_sid_str_buf(ids[1].sid, &buf), + (int)ids[1].xid.type)); + security_token_debug(DBGC_AUTH, 0, token); + return NT_STATUS_INVALID_SID; + } + + for (s=2; s < token->num_sids; s++) { + if (ids[s].xid.type == ID_TYPE_BOTH || + ids[s].xid.type == ID_TYPE_GID) { + (*sec)->groups[g] = ids[s].xid.id; + g++; + } else { + struct dom_sid_buf buf; + DEBUG(0, ("Unable to convert SID (%s) at index %u in user token to a GID. Conversion was returned as type %d, full token:\n", + dom_sid_str_buf(ids[s].sid, &buf), + (unsigned int)s, (int)ids[s].xid.type)); + security_token_debug(DBGC_AUTH, 0, token); + return NT_STATUS_INVALID_SID; + } + } + + DEBUG(5, ("Successfully converted security token to a unix token:")); + security_token_debug(0, 5, token); + TALLOC_FREE(ids); + + return NT_STATUS_OK; +} + +/* + * Fill in the unix_info elements in a struct session_info + */ +NTSTATUS fill_unix_info(struct loadparm_context *lp_ctx, + const char *original_user_name, + struct auth_session_info *session_info) +{ + session_info->unix_info = talloc_zero(session_info, + struct auth_user_info_unix); + NT_STATUS_HAVE_NO_MEMORY(session_info->unix_info); + + session_info->unix_info->unix_name = + talloc_asprintf(session_info->unix_info, + "%s%s%s", session_info->info->domain_name, + lpcfg_winbind_separator(lp_ctx), + session_info->info->account_name); + NT_STATUS_HAVE_NO_MEMORY(session_info->unix_info->unix_name); + + if (original_user_name == NULL) { + original_user_name = session_info->unix_info->unix_name; + } + + session_info->unix_info->sanitized_username = + talloc_alpha_strcpy(session_info->unix_info, + original_user_name, + ". _-$"); + NT_STATUS_HAVE_NO_MEMORY(session_info->unix_info->sanitized_username); + + return NT_STATUS_OK; +} + +/* + Fill in the auth_user_info_unix and auth_unix_token elements in a struct session_info +*/ +NTSTATUS auth_session_info_fill_unix(struct loadparm_context *lp_ctx, + const char *original_user_name, + struct auth_session_info *session_info) +{ + NTSTATUS status = NT_STATUS_OK; + + status = security_token_to_unix_token(session_info, + session_info->security_token, + &session_info->unix_token); + if (!NT_STATUS_IS_OK(status)) { + return status; + } + + status = fill_unix_info(lp_ctx, + original_user_name, + session_info); + if (!NT_STATUS_IS_OK(status)) { + return status; + } + + return NT_STATUS_OK; +} + +/* + * Set the given auth_user_info_unix and auth_unix_token elements in a + * struct session_info, similar auth_session_info_fill_unix(). + * Receives the uid and gid for the unix token as parameters and does + * not query the unix token from winbind (via security_token_to_unix_token()). + * This is useful to fill a user session info manually if winbind is not + * available. + */ +NTSTATUS auth_session_info_set_unix(struct loadparm_context *lp_ctx, + const char *original_user_name, + int uid, + int gid, + struct auth_session_info *session_info) +{ + NTSTATUS status; + + session_info->unix_token = talloc_zero(session_info, + struct security_unix_token); + if (session_info->unix_token == NULL) { + return NT_STATUS_NO_MEMORY; + } + + session_info->unix_token->uid = uid; + session_info->unix_token->gid = gid; + + status = fill_unix_info(lp_ctx, + original_user_name, + session_info); + if (!NT_STATUS_IS_OK(status)) { + return status; + } + + return NT_STATUS_OK; +} |