/* Unix SMB/CIFS implementation. Authentication utility functions Copyright (C) Andrew Tridgell 1992-1998 Copyright (C) Andrew Bartlett 2001 Copyright (C) Jeremy Allison 2000-2001 Copyright (C) Rafal Szczesniak 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 "includes.h" #undef DBGC_CLASS #define DBGC_CLASS DBGC_AUTH extern DOM_SID global_sid_World; extern DOM_SID global_sid_Network; extern DOM_SID global_sid_Builtin_Guests; extern DOM_SID global_sid_Authenticated_Users; /**************************************************************************** Create a UNIX user on demand. ****************************************************************************/ static int smb_create_user(const char *domain, const char *unix_username, const char *homedir) { pstring add_script; int ret; pstrcpy(add_script, lp_adduser_script()); if (! *add_script) return -1; all_string_sub(add_script, "%u", unix_username, sizeof(pstring)); if (domain) all_string_sub(add_script, "%D", domain, sizeof(pstring)); if (homedir) all_string_sub(add_script, "%H", homedir, sizeof(pstring)); ret = smbrun(add_script,NULL); DEBUG(3,("smb_create_user: Running the command `%s' gave %d\n",add_script,ret)); return ret; } /**************************************************************************** Add and Delete UNIX users on demand, based on NTSTATUS codes. We don't care about RID's here so ignore. ****************************************************************************/ void auth_add_user_script(const char *domain, const char *username) { uint32 rid; /* * User validated ok against Domain controller. * If the admin wants us to try and create a UNIX * user on the fly, do so. */ if ( *lp_adduser_script() ) smb_create_user(domain, username, NULL); else { DEBUG(10,("auth_add_user_script: no 'add user script'. Asking winbindd\n")); /* should never get here is we a re a domain member running winbindd However, a host set for 'security = server' might run winbindd for account allocation */ if ( !winbind_create_user(username, NULL) ) { DEBUG(5,("auth_add_user_script: winbindd_create_user() failed\n")); rid = 0; } } } /**************************************************************************** Create a SAM_ACCOUNT - either by looking in the pdb, or by faking it up from unix info. ****************************************************************************/ NTSTATUS auth_get_sam_account(const char *user, SAM_ACCOUNT **account) { BOOL pdb_ret; NTSTATUS nt_status; if (!NT_STATUS_IS_OK(nt_status = pdb_init_sam(account))) { return nt_status; } become_root(); pdb_ret = pdb_getsampwnam(*account, user); unbecome_root(); if (!pdb_ret) { struct passwd *pass = Get_Pwnam(user); if (!pass) return NT_STATUS_NO_SUCH_USER; if (!NT_STATUS_IS_OK(nt_status = pdb_fill_sam_pw(*account, pass))) { return nt_status; } } return NT_STATUS_OK; } /**************************************************************************** Create an auth_usersupplied_data structure ****************************************************************************/ static NTSTATUS make_user_info(auth_usersupplied_info **user_info, const char *smb_name, const char *internal_username, const char *client_domain, const char *domain, const char *wksta_name, DATA_BLOB lm_pwd, DATA_BLOB nt_pwd, DATA_BLOB plaintext, uint32 auth_flags, BOOL encrypted) { DEBUG(5,("attempting to make a user_info for %s (%s)\n", internal_username, smb_name)); *user_info = malloc(sizeof(**user_info)); if (!user_info) { DEBUG(0,("malloc failed for user_info (size %lu)\n", (unsigned long)sizeof(*user_info))); return NT_STATUS_NO_MEMORY; } ZERO_STRUCTP(*user_info); DEBUG(5,("making strings for %s's user_info struct\n", internal_username)); (*user_info)->smb_name.str = strdup(smb_name); if ((*user_info)->smb_name.str) { (*user_info)->smb_name.len = strlen(smb_name); } else { free_user_info(user_info); return NT_STATUS_NO_MEMORY; } (*user_info)->internal_username.str = strdup(internal_username); if ((*user_info)->internal_username.str) { (*user_info)->internal_username.len = strlen(internal_username); } else { free_user_info(user_info); return NT_STATUS_NO_MEMORY; } (*user_info)->domain.str = strdup(domain); if ((*user_info)->domain.str) { (*user_info)->domain.len = strlen(domain); } else { free_user_info(user_info); return NT_STATUS_NO_MEMORY; } (*user_info)->client_domain.str = strdup(client_domain); if ((*user_info)->client_domain.str) { (*user_info)->client_domain.len = strlen(client_domain); } else { free_user_info(user_info); return NT_STATUS_NO_MEMORY; } (*user_info)->wksta_name.str = strdup(wksta_name); if ((*user_info)->wksta_name.str) { (*user_info)->wksta_name.len = strlen(wksta_name); } else { free_user_info(user_info); return NT_STATUS_NO_MEMORY; } DEBUG(5,("making blobs for %s's user_info struct\n", internal_username)); (*user_info)->lm_resp = data_blob(lm_pwd.data, lm_pwd.length); (*user_info)->nt_resp = data_blob(nt_pwd.data, nt_pwd.length); (*user_info)->plaintext_password = data_blob(plaintext.data, plaintext.length); (*user_info)->encrypted = encrypted; (*user_info)->auth_flags = auth_flags; DEBUG(10,("made an %sencrypted user_info for %s (%s)\n", encrypted ? "":"un" , internal_username, smb_name)); return NT_STATUS_OK; } /**************************************************************************** Create an auth_usersupplied_data structure after appropriate mapping. ****************************************************************************/ NTSTATUS make_user_info_map(auth_usersupplied_info **user_info, const char *smb_name, const char *client_domain, const char *wksta_name, DATA_BLOB lm_pwd, DATA_BLOB nt_pwd, DATA_BLOB plaintext, uint32 ntlmssp_flags, BOOL encrypted) { const char *domain; fstring internal_username; fstrcpy(internal_username, smb_name); map_username(internal_username); DEBUG(5, ("make_user_info_map: Mapping user [%s]\\[%s] from workstation [%s]\n", client_domain, smb_name, wksta_name)); /* don't allow "" as a domain, fixes a Win9X bug where it doens't supply a domain for logon script 'net use' commands. */ if ( *client_domain ) domain = client_domain; else domain = lp_workgroup(); /* do what win2k does. Always map unknown domains to our own and let the "passdb backend" handle unknown users. */ if ( !is_trusted_domain(domain) && !strequal(domain, get_global_sam_name()) ) domain = get_default_sam_name(); /* we know that it is a trusted domain (and we are allowing them) or it is our domain */ return make_user_info(user_info, smb_name, internal_username, client_domain, domain, wksta_name, lm_pwd, nt_pwd, plaintext, ntlmssp_flags, encrypted); } /**************************************************************************** Create an auth_usersupplied_data, making the DATA_BLOBs here. Decrypt and encrypt the passwords. ****************************************************************************/ BOOL make_user_info_netlogon_network(auth_usersupplied_info **user_info, const char *smb_name, const char *client_domain, const char *wksta_name, const uchar *lm_network_pwd, int lm_pwd_len, const uchar *nt_network_pwd, int nt_pwd_len) { BOOL ret; NTSTATUS nt_status; DATA_BLOB lm_blob = data_blob(lm_network_pwd, lm_pwd_len); DATA_BLOB nt_blob = data_blob(nt_network_pwd, nt_pwd_len); DATA_BLOB plaintext_blob = data_blob(NULL, 0); uint32 auth_flags = AUTH_FLAG_NONE; if (lm_pwd_len) auth_flags |= AUTH_FLAG_LM_RESP; if (nt_pwd_len == 24) { auth_flags |= AUTH_FLAG_NTLM_RESP; } else if (nt_pwd_len != 0) { auth_flags |= AUTH_FLAG_NTLMv2_RESP; } nt_status = make_user_info_map(user_info, smb_name, client_domain, wksta_name, lm_blob, nt_blob, plaintext_blob, auth_flags, True); ret = NT_STATUS_IS_OK(nt_status) ? True : False; data_blob_free(&lm_blob); data_blob_free(&nt_blob); return ret; } /**************************************************************************** Create an auth_usersupplied_data, making the DATA_BLOBs here. Decrypt and encrypt the passwords. ****************************************************************************/ BOOL make_user_info_netlogon_interactive(auth_usersupplied_info **user_info, const char *smb_name, const char *client_domain, const char *wksta_name, const uchar chal[8], const uchar lm_interactive_pwd[16], const uchar nt_interactive_pwd[16], const uchar *dc_sess_key) { char lm_pwd[16]; char nt_pwd[16]; unsigned char local_lm_response[24]; unsigned char local_nt_response[24]; unsigned char key[16]; uint32 auth_flags = AUTH_FLAG_NONE; ZERO_STRUCT(key); memcpy(key, dc_sess_key, 8); if (lm_interactive_pwd) memcpy(lm_pwd, lm_interactive_pwd, sizeof(lm_pwd)); if (nt_interactive_pwd) memcpy(nt_pwd, nt_interactive_pwd, sizeof(nt_pwd)); #ifdef DEBUG_PASSWORD DEBUG(100,("key:")); dump_data(100, (char *)key, sizeof(key)); DEBUG(100,("lm owf password:")); dump_data(100, lm_pwd, sizeof(lm_pwd)); DEBUG(100,("nt owf password:")); dump_data(100, nt_pwd, sizeof(nt_pwd)); #endif SamOEMhash((uchar *)lm_pwd, key, sizeof(lm_pwd)); SamOEMhash((uchar *)nt_pwd, key, sizeof(nt_pwd)); #ifdef DEBUG_PASSWORD DEBUG(100,("decrypt of lm owf password:")); dump_data(100, lm_pwd, sizeof(lm_pwd)); DEBUG(100,("decrypt of nt owf password:")); dump_data(100, nt_pwd, sizeof(nt_pwd)); #endif SMBOWFencrypt((const unsigned char *)lm_pwd, chal, local_lm_response); SMBOWFencrypt((const unsigned char *)nt_pwd, chal, local_nt_response); /* Password info paranoia */ ZERO_STRUCT(lm_pwd); ZERO_STRUCT(nt_pwd); ZERO_STRUCT(key); { BOOL ret; NTSTATUS nt_status; DATA_BLOB local_lm_blob = data_blob(local_lm_response, sizeof(local_lm_response)); DATA_BLOB local_nt_blob = data_blob(local_nt_response, sizeof(local_nt_response)); DATA_BLOB plaintext_blob = data_blob(NULL, 0); if (lm_interactive_pwd) auth_flags |= AUTH_FLAG_LM_RESP; if (nt_interactive_pwd) auth_flags |= AUTH_FLAG_NTLM_RESP; nt_status = make_user_info_map(user_info, smb_name, client_domain, wksta_name, local_lm_blob, local_nt_blob, plaintext_blob, auth_flags, True); ret = NT_STATUS_IS_OK(nt_status) ? True : False; data_blob_free(&local_lm_blob); data_blob_free(&local_nt_blob); return ret; } } /**************************************************************************** Create an auth_usersupplied_data structure ****************************************************************************/ BOOL make_user_info_for_reply(auth_usersupplied_info **user_info, const char *smb_name, const char *client_domain, const uint8 chal[8], DATA_BLOB plaintext_password) { DATA_BLOB local_lm_blob; DATA_BLOB local_nt_blob; NTSTATUS ret = NT_STATUS_UNSUCCESSFUL; uint32 auth_flags = AUTH_FLAG_NONE; /* * Not encrypted - do so. */ DEBUG(5,("make_user_info_for_reply: User passwords not in encrypted format.\n")); if (plaintext_password.data) { unsigned char local_lm_response[24]; #ifdef DEBUG_PASSWORD DEBUG(10,("Unencrypted password (len %d):\n",plaintext_password.length)); dump_data(100, plaintext_password.data, plaintext_password.length); #endif SMBencrypt( (const char *)plaintext_password.data, (const uchar*)chal, local_lm_response); local_lm_blob = data_blob(local_lm_response, 24); /* We can't do an NT hash here, as the password needs to be case insensitive */ local_nt_blob = data_blob(NULL, 0); auth_flags = (AUTH_FLAG_PLAINTEXT | AUTH_FLAG_LM_RESP); } else { local_lm_blob = data_blob(NULL, 0); local_nt_blob = data_blob(NULL, 0); } ret = make_user_info_map(user_info, smb_name, client_domain, get_remote_machine_name(), local_lm_blob, local_nt_blob, plaintext_password, auth_flags, False); data_blob_free(&local_lm_blob); return NT_STATUS_IS_OK(ret) ? True : False; } /**************************************************************************** Create an auth_usersupplied_data structure ****************************************************************************/ NTSTATUS make_user_info_for_reply_enc(auth_usersupplied_info **user_info, const char *smb_name, const char *client_domain, DATA_BLOB lm_resp, DATA_BLOB nt_resp) { uint32 auth_flags = AUTH_FLAG_NONE; DATA_BLOB no_plaintext_blob = data_blob(NULL, 0); if (lm_resp.length == 24) { auth_flags |= AUTH_FLAG_LM_RESP; } if (nt_resp.length == 0) { } else if (nt_resp.length == 24) { auth_flags |= AUTH_FLAG_NTLM_RESP; } else { auth_flags |= AUTH_FLAG_NTLMv2_RESP; } return make_user_info_map(user_info, smb_name, client_domain, get_remote_machine_name(), lm_resp, nt_resp, no_plaintext_blob, auth_flags, True); } /**************************************************************************** Create a guest user_info blob, for anonymous authenticaion. ****************************************************************************/ BOOL make_user_info_guest(auth_usersupplied_info **user_info) { DATA_BLOB lm_blob = data_blob(NULL, 0); DATA_BLOB nt_blob = data_blob(NULL, 0); DATA_BLOB plaintext_blob = data_blob(NULL, 0); uint32 auth_flags = AUTH_FLAG_NONE; NTSTATUS nt_status; nt_status = make_user_info(user_info, "","", "","", "", nt_blob, lm_blob, plaintext_blob, auth_flags, True); return NT_STATUS_IS_OK(nt_status) ? True : False; } /**************************************************************************** prints a NT_USER_TOKEN to debug output. ****************************************************************************/ void debug_nt_user_token(int dbg_class, int dbg_lev, NT_USER_TOKEN *token) { fstring sid_str; size_t i; if (!token) { DEBUGC(dbg_class, dbg_lev, ("NT user token: (NULL)\n")); return; } DEBUGC(dbg_class, dbg_lev, ("NT user token of user %s\n", sid_to_string(sid_str, &token->user_sids[0]) )); DEBUGADDC(dbg_class, dbg_lev, ("contains %lu SIDs\n", (unsigned long)token->num_sids)); for (i = 0; i < token->num_sids; i++) DEBUGADDC(dbg_class, dbg_lev, ("SID[%3lu]: %s\n", (unsigned long)i, sid_to_string(sid_str, &token->user_sids[i]))); } /**************************************************************************** prints a UNIX 'token' to debug output. ****************************************************************************/ void debug_unix_user_token(int dbg_class, int dbg_lev, uid_t uid, gid_t gid, int n_groups, gid_t *groups) { int i; DEBUGC(dbg_class, dbg_lev, ("UNIX token of user %ld\n", (long int)uid)); DEBUGADDC(dbg_class, dbg_lev, ("Primary group is %ld and contains %i supplementary groups\n", (long int)gid, n_groups)); for (i = 0; i < n_groups; i++) DEBUGADDC(dbg_class, dbg_lev, ("Group[%3i]: %ld\n", i, (long int)groups[i])); } /**************************************************************************** Create the SID list for this user. ****************************************************************************/ static NTSTATUS create_nt_user_token(const DOM_SID *user_sid, const DOM_SID *group_sid, int n_groupSIDs, DOM_SID *groupSIDs, BOOL is_guest, NT_USER_TOKEN **token) { NTSTATUS nt_status = NT_STATUS_OK; NT_USER_TOKEN *ptoken; int i; int sid_ndx; if ((ptoken = malloc( sizeof(NT_USER_TOKEN) ) ) == NULL) { DEBUG(0, ("create_nt_token: Out of memory allocating token\n")); nt_status = NT_STATUS_NO_MEMORY; return nt_status; } ZERO_STRUCTP(ptoken); ptoken->num_sids = n_groupSIDs + 5; if ((ptoken->user_sids = (DOM_SID *)malloc( sizeof(DOM_SID) * ptoken->num_sids )) == NULL) { DEBUG(0, ("create_nt_token: Out of memory allocating SIDs\n")); nt_status = NT_STATUS_NO_MEMORY; return nt_status; } memset((char*)ptoken->user_sids,0,sizeof(DOM_SID) * ptoken->num_sids); /* * Note - user SID *MUST* be first in token ! * se_access_check depends on this. * * Primary group SID is second in token. Convention. */ sid_copy(&ptoken->user_sids[PRIMARY_USER_SID_INDEX], user_sid); if (group_sid) sid_copy(&ptoken->user_sids[PRIMARY_GROUP_SID_INDEX], group_sid); /* * Finally add the "standard" SIDs. * The only difference between guest and "anonymous" (which we * don't really support) is the addition of Authenticated_Users. */ sid_copy(&ptoken->user_sids[2], &global_sid_World); sid_copy(&ptoken->user_sids[3], &global_sid_Network); if (is_guest) sid_copy(&ptoken->user_sids[4], &global_sid_Builtin_Guests); else sid_copy(&ptoken->user_sids[4], &global_sid_Authenticated_Users); sid_ndx = 5; /* next available spot */ for (i = 0; i < n_groupSIDs; i++) { size_t check_sid_idx; for (check_sid_idx = 1; check_sid_idx < ptoken->num_sids; check_sid_idx++) { if (sid_equal(&ptoken->user_sids[check_sid_idx], &groupSIDs[i])) { break; } } if (check_sid_idx >= ptoken->num_sids) /* Not found already */ { sid_copy(&ptoken->user_sids[sid_ndx++], &groupSIDs[i]); } else { ptoken->num_sids--; } } debug_nt_user_token(DBGC_AUTH, 10, ptoken); *token = ptoken; return nt_status; } /**************************************************************************** Create the SID list for this user. ****************************************************************************/ NT_USER_TOKEN *create_nt_token(uid_t uid, gid_t gid, int ngroups, gid_t *groups, BOOL is_guest) { DOM_SID user_sid; DOM_SID group_sid; DOM_SID *group_sids; NT_USER_TOKEN *token; int i; if (!NT_STATUS_IS_OK(uid_to_sid(&user_sid, uid))) { return NULL; } if (!NT_STATUS_IS_OK(gid_to_sid(&group_sid, gid))) { return NULL; } group_sids = malloc(sizeof(DOM_SID) * ngroups); if (!group_sids) { DEBUG(0, ("create_nt_token: malloc() failed for DOM_SID list!\n")); return NULL; } for (i = 0; i < ngroups; i++) { if (!NT_STATUS_IS_OK(gid_to_sid(&(group_sids)[i], (groups)[i]))) { DEBUG(1, ("create_nt_token: failed to convert gid %ld to a sid!\n", (long int)groups[i])); SAFE_FREE(group_sids); return NULL; } } if (!NT_STATUS_IS_OK(create_nt_user_token(&user_sid, &group_sid, ngroups, group_sids, is_guest, &token))) { SAFE_FREE(group_sids); return NULL; } SAFE_FREE(group_sids); return token; } static void add_gid_to_array_unique(gid_t gid, gid_t **groups, int *ngroups) { int i; if ((*ngroups) >= groups_max()) return; for (i=0; i<*ngroups; i++) { if ((*groups)[i] == gid) return; } *groups = Realloc(*groups, ((*ngroups)+1) * sizeof(gid_t)); if (*groups == NULL) return; (*groups)[*ngroups] = gid; *ngroups += 1; } static void add_foreign_gids_from_sid(const DOM_SID *sid, gid_t **groups, int *ngroups) { DOM_SID *aliases; int j, num_aliases; if (!pdb_enum_alias_memberships(sid, &aliases, &num_aliases)) return; for (j=0; j 0) { *groups = malloc(sizeof(DOM_SID) * n_unix_groups); if (!*groups) { DEBUG(0, ("get_user_group: malloc() failed for DOM_SID list!\n")); SAFE_FREE(*unix_groups); return NT_STATUS_NO_MEMORY; } } *n_groups = n_unix_groups; for (i = 0; i < *n_groups; i++) { if (!NT_STATUS_IS_OK(gid_to_sid(&(*groups)[i], (*unix_groups)[i]))) { DEBUG(1, ("get_user_groups: failed to convert gid %ld to a sid!\n", (long int)(*unix_groups)[i+1])); SAFE_FREE(*groups); SAFE_FREE(*unix_groups); return NT_STATUS_NO_SUCH_USER; } } return NT_STATUS_OK; } /*************************************************************************** Make a user_info struct ***************************************************************************/ static NTSTATUS make_server_info(auth_serversupplied_info **server_info) { *server_info = malloc(sizeof(**server_info)); if (!*server_info) { DEBUG(0,("make_server_info: malloc failed!\n")); return NT_STATUS_NO_MEMORY; } ZERO_STRUCTP(*server_info); /* Initialise the uid and gid values to something non-zero which may save us from giving away root access if there is a bug in allocating these fields. */ (*server_info)->uid = -1; (*server_info)->gid = -1; return NT_STATUS_OK; } /*************************************************************************** Fill a server_info struct from a SAM_ACCOUNT with their groups ***************************************************************************/ static NTSTATUS add_user_groups(auth_serversupplied_info **server_info, SAM_ACCOUNT *sampass, uid_t uid, gid_t gid) { NTSTATUS nt_status; const DOM_SID *user_sid = pdb_get_user_sid(sampass); const DOM_SID *group_sid = pdb_get_group_sid(sampass); int n_groupSIDs = 0; DOM_SID *groupSIDs = NULL; gid_t *unix_groups = NULL; NT_USER_TOKEN *token; BOOL is_guest; uint32 rid; nt_status = get_user_groups(pdb_get_username(sampass), uid, gid, &n_groupSIDs, &groupSIDs, &unix_groups); if (!NT_STATUS_IS_OK(nt_status)) { DEBUG(4,("get_user_groups_from_local_sam failed\n")); free_server_info(server_info); return nt_status; } is_guest = (sid_peek_rid(user_sid, &rid) && rid == DOMAIN_USER_RID_GUEST); if (!NT_STATUS_IS_OK(nt_status = create_nt_user_token(user_sid, group_sid, n_groupSIDs, groupSIDs, is_guest, &token))) { DEBUG(4,("create_nt_user_token failed\n")); SAFE_FREE(groupSIDs); SAFE_FREE(unix_groups); free_server_info(server_info); return nt_status; } SAFE_FREE(groupSIDs); (*server_info)->n_groups = n_groupSIDs; (*server_info)->groups = unix_groups; (*server_info)->ptok = token; return nt_status; } /*************************************************************************** Make (and fill) a user_info struct from a SAM_ACCOUNT ***************************************************************************/ NTSTATUS make_server_info_sam(auth_serversupplied_info **server_info, SAM_ACCOUNT *sampass) { NTSTATUS nt_status; struct passwd *pwd; if (!NT_STATUS_IS_OK(nt_status = make_server_info(server_info))) return nt_status; (*server_info)->sam_account = sampass; if ( !(pwd = getpwnam_alloc(pdb_get_username(sampass))) ) { DEBUG(1, ("User %s in passdb, but getpwnam() fails!\n", pdb_get_username(sampass))); free_server_info(server_info); return NT_STATUS_NO_SUCH_USER; } (*server_info)->unix_name = smb_xstrdup(pwd->pw_name); (*server_info)->gid = pwd->pw_gid; (*server_info)->uid = pwd->pw_uid; passwd_free(&pwd); if (!NT_STATUS_IS_OK(nt_status = add_user_groups(server_info, sampass, (*server_info)->uid, (*server_info)->gid))) { free_server_info(server_info); return nt_status; } (*server_info)->sam_fill_level = SAM_FILL_ALL; DEBUG(5,("make_server_info_sam: made server info for user %s -> %s\n", pdb_get_username(sampass), (*server_info)->unix_name)); return nt_status; } /*************************************************************************** Make (and fill) a user_info struct from a 'struct passwd' by conversion to a SAM_ACCOUNT ***************************************************************************/ NTSTATUS make_server_info_pw(auth_serversupplied_info **server_info, const struct passwd *pwd) { NTSTATUS nt_status; SAM_ACCOUNT *sampass = NULL; if (!NT_STATUS_IS_OK(nt_status = pdb_init_sam_pw(&sampass, pwd))) { return nt_status; } if (!NT_STATUS_IS_OK(nt_status = make_server_info(server_info))) { return nt_status; } (*server_info)->sam_account = sampass; if (!NT_STATUS_IS_OK(nt_status = add_user_groups(server_info, sampass, pwd->pw_uid, pwd->pw_gid))) { return nt_status; } (*server_info)->unix_name = smb_xstrdup(pwd->pw_name); (*server_info)->sam_fill_level = SAM_FILL_ALL; (*server_info)->uid = pwd->pw_uid; (*server_info)->gid = pwd->pw_gid; return nt_status; } /*************************************************************************** Make (and fill) a user_info struct for a guest login. ***************************************************************************/ NTSTATUS make_server_info_guest(auth_serversupplied_info **server_info) { NTSTATUS nt_status; SAM_ACCOUNT *sampass = NULL; DOM_SID guest_sid; if (!NT_STATUS_IS_OK(nt_status = pdb_init_sam(&sampass))) { return nt_status; } sid_copy(&guest_sid, get_global_sam_sid()); sid_append_rid(&guest_sid, DOMAIN_USER_RID_GUEST); become_root(); if (!pdb_getsampwsid(sampass, &guest_sid)) { unbecome_root(); return NT_STATUS_NO_SUCH_USER; } unbecome_root(); nt_status = make_server_info_sam(server_info, sampass); if (NT_STATUS_IS_OK(nt_status)) { static const char zeros[16]; (*server_info)->guest = True; /* annoying, but the Guest really does have a session key, and it is all zeros! */ (*server_info)->nt_session_key = data_blob(zeros, sizeof(zeros)); (*server_info)->lm_session_key = data_blob(zeros, sizeof(zeros)); } return nt_status; } /*************************************************************************** Purely internal function for make_server_info_info3 Fill the sam account from getpwnam ***************************************************************************/ static NTSTATUS fill_sam_account(TALLOC_CTX *mem_ctx, const char *domain, const char *username, char **found_username, uid_t *uid, gid_t *gid, SAM_ACCOUNT **sam_account) { fstring dom_user; struct passwd *passwd; fstr_sprintf(dom_user, "%s%s%s", domain, lp_winbind_separator(), username); passwd = Get_Pwnam(dom_user); if ( passwd ) { char *p; /* make sure we get the case of the username correct */ /* work around 'winbind use default domain = yes' */ p = strchr( passwd->pw_name, *lp_winbind_separator() ); if ( !p ) fstr_sprintf(dom_user, "%s%s%s", domain, lp_winbind_separator(), passwd->pw_name); else fstrcpy( dom_user, passwd->pw_name ); } else { /* if the lookup for DOMAIN\username failed, try again with just 'username'. This is need for accessing the server as a trust user that actually maps to a local account */ fstrcpy( dom_user, username ); passwd = Get_Pwnam( dom_user ); /* make sure we get the case of the username correct */ if ( passwd ) fstrcpy( dom_user, passwd->pw_name ); } if ( !passwd ) return NT_STATUS_NO_SUCH_USER; *uid = passwd->pw_uid; *gid = passwd->pw_gid; /* This is pointless -- there is no suport for differeing unix and windows names. Make sure to always store the one we actually looked up and succeeded. Have I mentioned why I hate the 'winbind use default domain' parameter? --jerry */ *found_username = talloc_strdup(mem_ctx, dom_user); DEBUG(5,("fill_sam_account: located username was [%s]\n", *found_username)); return pdb_init_sam_pw(sam_account, passwd); } /**************************************************************************** Wrapper to allow the getpwnam() call to strip the domain name and try again in case a local UNIX user is already there. Also run through the username if we fallback to the username only. ****************************************************************************/ struct passwd *smb_getpwnam( char *domuser ) { struct passwd *pw = NULL; char *p; fstring mapped_username; pw = Get_Pwnam( domuser ); if ( pw ) return pw; /* fallback to looking up just the username */ p = strchr( domuser, *lp_winbind_separator() ); if ( p ) { p += 1; fstrcpy( mapped_username, p ); map_username( mapped_username ); pw = Get_Pwnam(mapped_username); if (!pw) { /* Don't add a machine account. */ if (mapped_username[strlen(mapped_username)-1] == '$') return NULL; /* Create local user if requested. */ p = strchr( mapped_username, *lp_winbind_separator() ); if (p) p += 1; else p = mapped_username; auth_add_user_script(NULL, p); return Get_Pwnam(p); } } return pw; } /*************************************************************************** Make a server_info struct from the info3 returned by a domain logon ***************************************************************************/ NTSTATUS make_server_info_info3(TALLOC_CTX *mem_ctx, const char *internal_username, const char *sent_nt_username, const char *domain, auth_serversupplied_info **server_info, NET_USER_INFO_3 *info3) { static const char zeros[16]; NTSTATUS nt_status = NT_STATUS_OK; char *found_username; const char *nt_domain; const char *nt_username; SAM_ACCOUNT *sam_account = NULL; DOM_SID user_sid; DOM_SID group_sid; uid_t uid; gid_t gid; int n_lgroupSIDs; DOM_SID *lgroupSIDs = NULL; gid_t *unix_groups = NULL; NT_USER_TOKEN *token; DOM_SID *all_group_SIDs; size_t i; /* Here is where we should check the list of trusted domains, and verify that the SID matches. */ sid_copy(&user_sid, &info3->dom_sid.sid); if (!sid_append_rid(&user_sid, info3->user_rid)) { return NT_STATUS_INVALID_PARAMETER; } sid_copy(&group_sid, &info3->dom_sid.sid); if (!sid_append_rid(&group_sid, info3->group_rid)) { return NT_STATUS_INVALID_PARAMETER; } if (!(nt_username = unistr2_tdup(mem_ctx, &(info3->uni_user_name)))) { /* If the server didn't give us one, just use the one we sent them */ nt_username = sent_nt_username; } if (!(nt_domain = unistr2_tdup(mem_ctx, &(info3->uni_logon_dom)))) { /* If the server didn't give us one, just use the one we sent them */ nt_domain = domain; } /* try to fill the SAM account.. If getpwnam() fails, then try the add user script (2.2.x behavior) */ nt_status = fill_sam_account(mem_ctx, nt_domain, internal_username, &found_username, &uid, &gid, &sam_account); if (NT_STATUS_EQUAL(nt_status, NT_STATUS_NO_SUCH_USER)) { DEBUG(3,("User %s does not exist, trying to add it\n", internal_username)); auth_add_user_script(nt_domain, internal_username); nt_status = fill_sam_account(mem_ctx, nt_domain, internal_username, &found_username, &uid, &gid, &sam_account); } if (!NT_STATUS_IS_OK(nt_status)) { DEBUG(0, ("make_server_info_info3: pdb_init_sam failed!\n")); return nt_status; } if (!pdb_set_nt_username(sam_account, nt_username, PDB_CHANGED)) { pdb_free_sam(&sam_account); return NT_STATUS_NO_MEMORY; } if (!pdb_set_username(sam_account, nt_username, PDB_CHANGED)) { pdb_free_sam(&sam_account); return NT_STATUS_NO_MEMORY; } if (!pdb_set_domain(sam_account, nt_domain, PDB_CHANGED)) { pdb_free_sam(&sam_account); return NT_STATUS_NO_MEMORY; } if (!pdb_set_user_sid(sam_account, &user_sid, PDB_CHANGED)) { pdb_free_sam(&sam_account); return NT_STATUS_UNSUCCESSFUL; } if (!pdb_set_group_sid(sam_account, &group_sid, PDB_CHANGED)) { pdb_free_sam(&sam_account); return NT_STATUS_UNSUCCESSFUL; } if (!pdb_set_fullname(sam_account, unistr2_static(&(info3->uni_full_name)), PDB_CHANGED)) { pdb_free_sam(&sam_account); return NT_STATUS_NO_MEMORY; } if (!pdb_set_logon_script(sam_account, unistr2_static(&(info3->uni_logon_script)), PDB_CHANGED)) { pdb_free_sam(&sam_account); return NT_STATUS_NO_MEMORY; } if (!pdb_set_profile_path(sam_account, unistr2_static(&(info3->uni_profile_path)), PDB_CHANGED)) { pdb_free_sam(&sam_account); return NT_STATUS_NO_MEMORY; } if (!pdb_set_homedir(sam_account, unistr2_static(&(info3->uni_home_dir)), PDB_CHANGED)) { pdb_free_sam(&sam_account); return NT_STATUS_NO_MEMORY; } if (!pdb_set_dir_drive(sam_account, unistr2_static(&(info3->uni_dir_drive)), PDB_CHANGED)) { pdb_free_sam(&sam_account); return NT_STATUS_NO_MEMORY; } if (!NT_STATUS_IS_OK(nt_status = make_server_info(server_info))) { DEBUG(4, ("make_server_info failed!\n")); pdb_free_sam(&sam_account); return nt_status; } /* save this here to _net_sam_logon() doesn't fail (it assumes a valid SAM_ACCOUNT) */ (*server_info)->sam_account = sam_account; (*server_info)->unix_name = smb_xstrdup(found_username); /* Fill in the unix info we found on the way */ (*server_info)->sam_fill_level = SAM_FILL_ALL; (*server_info)->uid = uid; (*server_info)->gid = gid; /* Store the user group information in the server_info returned to the caller. */ nt_status = get_user_groups((*server_info)->unix_name, uid, gid, &n_lgroupSIDs, &lgroupSIDs, &unix_groups); if ( !NT_STATUS_IS_OK(nt_status) ) { DEBUG(4,("get_user_groups failed\n")); return nt_status; } (*server_info)->groups = unix_groups; (*server_info)->n_groups = n_lgroupSIDs; /* Create a 'combined' list of all SIDs we might want in the SD */ all_group_SIDs = malloc(sizeof(DOM_SID) * (info3->num_groups2 +info3->num_other_sids)); if (!all_group_SIDs) { DEBUG(0, ("malloc() failed for DOM_SID list!\n")); SAFE_FREE(lgroupSIDs); free_server_info(server_info); return NT_STATUS_NO_MEMORY; } #if 0 /* JERRY -- no such thing as local groups in current code */ /* Copy the 'local' sids */ memcpy(all_group_SIDs, lgroupSIDs, sizeof(DOM_SID) * n_lgroupSIDs); SAFE_FREE(lgroupSIDs); #endif /* and create (by appending rids) the 'domain' sids */ for (i = 0; i < info3->num_groups2; i++) { sid_copy(&all_group_SIDs[i], &(info3->dom_sid.sid)); if (!sid_append_rid(&all_group_SIDs[i], info3->gids[i].g_rid)) { nt_status = NT_STATUS_INVALID_PARAMETER; DEBUG(3,("could not append additional group rid 0x%x\n", info3->gids[i].g_rid)); SAFE_FREE(lgroupSIDs); free_server_info(server_info); return nt_status; } } /* Copy 'other' sids. We need to do sid filtering here to prevent possible elevation of privileges. See: http://www.microsoft.com/windows2000/techinfo/administration/security/sidfilter.asp */ for (i = 0; i < info3->num_other_sids; i++) { sid_copy(&all_group_SIDs[info3->num_groups2 + i], &info3->other_sids[i].sid); } /* Where are the 'global' sids... */ /* can the user be guest? if yes, where is it stored? */ nt_status = create_nt_user_token(&user_sid, &group_sid, info3->num_groups2 + info3->num_other_sids, all_group_SIDs, False, &token); if ( !NT_STATUS_IS_OK(nt_status) ) { DEBUG(4,("create_nt_user_token failed\n")); SAFE_FREE(all_group_SIDs); free_server_info(server_info); return nt_status; } (*server_info)->ptok = token; SAFE_FREE(all_group_SIDs); /* ensure we are never given NULL session keys */ if (memcmp(info3->user_sess_key, zeros, sizeof(zeros)) == 0) { (*server_info)->nt_session_key = data_blob(NULL, 0); } else { (*server_info)->nt_session_key = data_blob(info3->user_sess_key, sizeof(info3->user_sess_key)); } if (memcmp(info3->padding, zeros, sizeof(zeros)) == 0) { (*server_info)->lm_session_key = data_blob(NULL, 0); } else { (*server_info)->lm_session_key = data_blob(info3->padding, 16); } return NT_STATUS_OK; } /*************************************************************************** Free a user_info struct ***************************************************************************/ void free_user_info(auth_usersupplied_info **user_info) { DEBUG(5,("attempting to free (and zero) a user_info structure\n")); if (*user_info != NULL) { if ((*user_info)->smb_name.str) { DEBUG(10,("structure was created for %s\n", (*user_info)->smb_name.str)); } SAFE_FREE((*user_info)->smb_name.str); SAFE_FREE((*user_info)->internal_username.str); SAFE_FREE((*user_info)->client_domain.str); SAFE_FREE((*user_info)->domain.str); SAFE_FREE((*user_info)->wksta_name.str); data_blob_free(&(*user_info)->lm_resp); data_blob_free(&(*user_info)->nt_resp); SAFE_FREE((*user_info)->interactive_password); data_blob_clear_free(&(*user_info)->plaintext_password); ZERO_STRUCT(**user_info); } SAFE_FREE(*user_info); } /*************************************************************************** Clear out a server_info struct that has been allocated ***************************************************************************/ void free_server_info(auth_serversupplied_info **server_info) { DEBUG(5,("attempting to free (and zero) a server_info structure\n")); if (*server_info != NULL) { pdb_free_sam(&(*server_info)->sam_account); /* call pam_end here, unless we know we are keeping it */ delete_nt_token( &(*server_info)->ptok ); SAFE_FREE((*server_info)->groups); SAFE_FREE((*server_info)->unix_name); data_blob_free(&(*server_info)->lm_session_key); data_blob_free(&(*server_info)->nt_session_key); ZERO_STRUCT(**server_info); } SAFE_FREE(*server_info); } /*************************************************************************** Make an auth_methods struct ***************************************************************************/ BOOL make_auth_methods(struct auth_context *auth_context, auth_methods **auth_method) { if (!auth_context) { smb_panic("no auth_context supplied to make_auth_methods()!\n"); } if (!auth_method) { smb_panic("make_auth_methods: pointer to auth_method pointer is NULL!\n"); } *auth_method = talloc(auth_context->mem_ctx, sizeof(**auth_method)); if (!*auth_method) { DEBUG(0,("make_auth_method: malloc failed!\n")); return False; } ZERO_STRUCTP(*auth_method); return True; } /**************************************************************************** Delete a SID token. ****************************************************************************/ void delete_nt_token(NT_USER_TOKEN **pptoken) { if (*pptoken) { NT_USER_TOKEN *ptoken = *pptoken; SAFE_FREE( ptoken->user_sids ); ZERO_STRUCTP(ptoken); } SAFE_FREE(*pptoken); } /**************************************************************************** Duplicate a SID token. ****************************************************************************/ NT_USER_TOKEN *dup_nt_token(NT_USER_TOKEN *ptoken) { NT_USER_TOKEN *token; if (!ptoken) return NULL; if ((token = (NT_USER_TOKEN *)malloc( sizeof(NT_USER_TOKEN) ) ) == NULL) return NULL; ZERO_STRUCTP(token); if ((token->user_sids = (DOM_SID *)memdup( ptoken->user_sids, sizeof(DOM_SID) * ptoken->num_sids )) == NULL) { SAFE_FREE(token); return NULL; } token->num_sids = ptoken->num_sids; return token; } /** * Squash an NT_STATUS in line with security requirements. * In an attempt to avoid giving the whole game away when users * are authenticating, NT replaces both NT_STATUS_NO_SUCH_USER and * NT_STATUS_WRONG_PASSWORD with NT_STATUS_LOGON_FAILURE in certain situations * (session setups in particular). * * @param nt_status NTSTATUS input for squashing. * @return the 'squashed' nt_status **/ NTSTATUS nt_status_squash(NTSTATUS nt_status) { if NT_STATUS_IS_OK(nt_status) { return nt_status; } else if NT_STATUS_EQUAL(nt_status, NT_STATUS_NO_SUCH_USER) { /* Match WinXP and don't give the game away */ return NT_STATUS_LOGON_FAILURE; } else if NT_STATUS_EQUAL(nt_status, NT_STATUS_WRONG_PASSWORD) { /* Match WinXP and don't give the game away */ return NT_STATUS_LOGON_FAILURE; } else { return nt_status; } } /** * Verify whether or not given domain is trusted. * * @param domain_name name of the domain to be verified * @return true if domain is one of the trusted once or * false if otherwise **/ BOOL is_trusted_domain(const char* dom_name) { DOM_SID trustdom_sid; char *pass = NULL; time_t lct; BOOL ret; /* no trusted domains for a standalone server */ if ( lp_server_role() == ROLE_STANDALONE ) return False; /* if we are a DC, then check for a direct trust relationships */ if (lp_server_role() == ROLE_DOMAIN_BDC || lp_server_role() == ROLE_DOMAIN_PDC) { become_root(); ret = secrets_fetch_trusted_domain_password(dom_name, &pass, &trustdom_sid, &lct); unbecome_root(); SAFE_FREE(pass); if (ret) return True; } else { /* if winbindd is not up and we are a domain member) then we need to update the trustdom_cache ourselves */ if ( !winbind_ping() ) update_trustdom_cache(); } /* now the trustdom cache should be available a DC could still * have a transitive trust so fall back to the cache of trusted * domains (like a domain member would use */ if ( trustdom_cache_fetch(dom_name, &trustdom_sid) ) { return True; } return False; }