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Diffstat (limited to 'source3/auth/auth_util.c')
| -rw-r--r-- | source3/auth/auth_util.c | 2166 |
1 files changed, 2166 insertions, 0 deletions
diff --git a/source3/auth/auth_util.c b/source3/auth/auth_util.c new file mode 100644 index 0000000000..9220df01c0 --- /dev/null +++ b/source3/auth/auth_util.c @@ -0,0 +1,2166 @@ +/* + 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 + Copyright (C) Volker Lendecke 2006 + + 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" + +#undef DBGC_CLASS +#define DBGC_CLASS DBGC_AUTH + +/**************************************************************************** + Ensure primary group SID is always at position 0 in a + auth_serversupplied_info struct. +****************************************************************************/ + +static void sort_sid_array_for_smbd(auth_serversupplied_info *result, + const DOM_SID *pgroup_sid) +{ + unsigned int i; + + if (!result->sids) { + return; + } + + if (sid_compare(&result->sids[0], pgroup_sid)==0) { + return; + } + + for (i = 1; i < result->num_sids; i++) { + if (sid_compare(pgroup_sid, + &result->sids[i]) == 0) { + sid_copy(&result->sids[i], &result->sids[0]); + sid_copy(&result->sids[0], pgroup_sid); + return; + } + } +} + +/**************************************************************************** + Create a UNIX user on demand. +****************************************************************************/ + +static int smb_create_user(const char *domain, const char *unix_username, const char *homedir) +{ + TALLOC_CTX *ctx = talloc_tos(); + char *add_script; + int ret; + + add_script = talloc_strdup(ctx, lp_adduser_script()); + if (!add_script || !*add_script) { + return -1; + } + add_script = talloc_all_string_sub(ctx, + add_script, + "%u", + unix_username); + if (!add_script) { + return -1; + } + if (domain) { + add_script = talloc_all_string_sub(ctx, + add_script, + "%D", + domain); + if (!add_script) { + return -1; + } + } + if (homedir) { + add_script = talloc_all_string_sub(ctx, + add_script, + "%H", + homedir); + if (!add_script) { + return -1; + } + } + ret = smbrun(add_script,NULL); + flush_pwnam_cache(); + DEBUG(ret ? 0 : 3, + ("smb_create_user: Running the command `%s' gave %d\n", + add_script,ret)); + return ret; +} + +/**************************************************************************** + 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 *lm_interactive_pwd, DATA_BLOB *nt_interactive_pwd, + DATA_BLOB *plaintext, + bool encrypted) +{ + + DEBUG(5,("attempting to make a user_info for %s (%s)\n", internal_username, smb_name)); + + *user_info = SMB_MALLOC_P(auth_usersupplied_info); + if (*user_info == NULL) { + 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 = SMB_STRDUP(smb_name); + if ((*user_info)->smb_name == NULL) { + free_user_info(user_info); + return NT_STATUS_NO_MEMORY; + } + + (*user_info)->internal_username = SMB_STRDUP(internal_username); + if ((*user_info)->internal_username == NULL) { + free_user_info(user_info); + return NT_STATUS_NO_MEMORY; + } + + (*user_info)->domain = SMB_STRDUP(domain); + if ((*user_info)->domain == NULL) { + free_user_info(user_info); + return NT_STATUS_NO_MEMORY; + } + + (*user_info)->client_domain = SMB_STRDUP(client_domain); + if ((*user_info)->client_domain == NULL) { + free_user_info(user_info); + return NT_STATUS_NO_MEMORY; + } + + (*user_info)->wksta_name = SMB_STRDUP(wksta_name); + if ((*user_info)->wksta_name == NULL) { + free_user_info(user_info); + return NT_STATUS_NO_MEMORY; + } + + DEBUG(5,("making blobs for %s's user_info struct\n", internal_username)); + + if (lm_pwd) + (*user_info)->lm_resp = data_blob(lm_pwd->data, lm_pwd->length); + if (nt_pwd) + (*user_info)->nt_resp = data_blob(nt_pwd->data, nt_pwd->length); + if (lm_interactive_pwd) + (*user_info)->lm_interactive_pwd = data_blob(lm_interactive_pwd->data, lm_interactive_pwd->length); + if (nt_interactive_pwd) + (*user_info)->nt_interactive_pwd = data_blob(nt_interactive_pwd->data, nt_interactive_pwd->length); + + if (plaintext) + (*user_info)->plaintext_password = data_blob(plaintext->data, plaintext->length); + + (*user_info)->encrypted = encrypted; + + (*user_info)->logon_parameters = 0; + + 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 *lm_interactive_pwd, DATA_BLOB *nt_interactive_pwd, + DATA_BLOB *plaintext, + bool encrypted) +{ + const char *domain; + NTSTATUS result; + bool was_mapped; + fstring internal_username; + fstrcpy(internal_username, smb_name); + was_mapped = 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 = my_sam_name(); + + /* we know that it is a trusted domain (and we are allowing them) or it is our domain */ + + result = make_user_info(user_info, smb_name, internal_username, + client_domain, domain, wksta_name, + lm_pwd, nt_pwd, + lm_interactive_pwd, nt_interactive_pwd, + plaintext, encrypted); + if (NT_STATUS_IS_OK(result)) { + (*user_info)->was_mapped = was_mapped; + } + return result; +} + +/**************************************************************************** + 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, + uint32 logon_parameters, + const uchar *lm_network_pwd, + int lm_pwd_len, + const uchar *nt_network_pwd, + int nt_pwd_len) +{ + bool ret; + NTSTATUS 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); + + status = make_user_info_map(user_info, + smb_name, client_domain, + wksta_name, + lm_pwd_len ? &lm_blob : NULL, + nt_pwd_len ? &nt_blob : NULL, + NULL, NULL, NULL, + True); + + if (NT_STATUS_IS_OK(status)) { + (*user_info)->logon_parameters = logon_parameters; + } + ret = NT_STATUS_IS_OK(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, + uint32 logon_parameters, + const uchar chal[8], + const uchar lm_interactive_pwd[16], + const uchar nt_interactive_pwd[16], + const uchar *dc_sess_key) +{ + unsigned char lm_pwd[16]; + unsigned char nt_pwd[16]; + unsigned char local_lm_response[24]; + unsigned char local_nt_response[24]; + unsigned char key[16]; + + 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, 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 + + if (lm_interactive_pwd) + SamOEMhash(lm_pwd, key, sizeof(lm_pwd)); + + if (nt_interactive_pwd) + SamOEMhash(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 + + if (lm_interactive_pwd) + SMBOWFencrypt(lm_pwd, chal, + local_lm_response); + + if (nt_interactive_pwd) + SMBOWFencrypt(nt_pwd, chal, + local_nt_response); + + /* Password info paranoia */ + ZERO_STRUCT(key); + + { + bool ret; + NTSTATUS nt_status; + DATA_BLOB local_lm_blob; + DATA_BLOB local_nt_blob; + + DATA_BLOB lm_interactive_blob; + DATA_BLOB nt_interactive_blob; + + if (lm_interactive_pwd) { + local_lm_blob = data_blob(local_lm_response, + sizeof(local_lm_response)); + lm_interactive_blob = data_blob(lm_pwd, + sizeof(lm_pwd)); + ZERO_STRUCT(lm_pwd); + } + + if (nt_interactive_pwd) { + local_nt_blob = data_blob(local_nt_response, + sizeof(local_nt_response)); + nt_interactive_blob = data_blob(nt_pwd, + sizeof(nt_pwd)); + ZERO_STRUCT(nt_pwd); + } + + nt_status = make_user_info_map( + user_info, + smb_name, client_domain, wksta_name, + lm_interactive_pwd ? &local_lm_blob : NULL, + nt_interactive_pwd ? &local_nt_blob : NULL, + lm_interactive_pwd ? &lm_interactive_blob : NULL, + nt_interactive_pwd ? &nt_interactive_blob : NULL, + NULL, True); + + if (NT_STATUS_IS_OK(nt_status)) { + (*user_info)->logon_parameters = logon_parameters; + } + + ret = NT_STATUS_IS_OK(nt_status) ? True : False; + data_blob_free(&local_lm_blob); + data_blob_free(&local_nt_blob); + data_blob_free(&lm_interactive_blob); + data_blob_free(&nt_interactive_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; + + /* + * 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", + (int)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; + + } else { + local_lm_blob = data_blob_null; + local_nt_blob = data_blob_null; + } + + ret = make_user_info_map( + user_info, smb_name, client_domain, + get_remote_machine_name(), + local_lm_blob.data ? &local_lm_blob : NULL, + local_nt_blob.data ? &local_nt_blob : NULL, + NULL, NULL, + plaintext_password.data ? &plaintext_password : NULL, + 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) +{ + return make_user_info_map(user_info, smb_name, + client_domain, + get_remote_machine_name(), + lm_resp.data ? &lm_resp : NULL, + nt_resp.data ? &nt_resp : NULL, + NULL, NULL, NULL, + True); +} + +/**************************************************************************** + Create a guest user_info blob, for anonymous authenticaion. +****************************************************************************/ + +bool make_user_info_guest(auth_usersupplied_info **user_info) +{ + NTSTATUS nt_status; + + nt_status = make_user_info(user_info, + "","", + "","", + "", + NULL, NULL, + NULL, NULL, + NULL, + True); + + return NT_STATUS_IS_OK(nt_status) ? True : False; +} + +static int server_info_dtor(auth_serversupplied_info *server_info) +{ + TALLOC_FREE(server_info->sam_account); + ZERO_STRUCTP(server_info); + return 0; +} + +/*************************************************************************** + Make a server_info struct. Free with TALLOC_FREE(). +***************************************************************************/ + +static auth_serversupplied_info *make_server_info(TALLOC_CTX *mem_ctx) +{ + struct auth_serversupplied_info *result; + + result = TALLOC_ZERO_P(mem_ctx, auth_serversupplied_info); + if (result == NULL) { + DEBUG(0, ("talloc failed\n")); + return NULL; + } + + talloc_set_destructor(result, server_info_dtor); + + /* 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. */ + + result->utok.uid = -1; + result->utok.gid = -1; + return result; +} + +static char *sanitize_username(TALLOC_CTX *mem_ctx, const char *username) +{ + fstring tmp; + + alpha_strcpy(tmp, username, ". _-$", sizeof(tmp)); + return talloc_strdup(mem_ctx, tmp); +} + +/*************************************************************************** + Is the incoming username our own machine account ? + If so, the connection is almost certainly from winbindd. +***************************************************************************/ + +static bool is_our_machine_account(const char *username) +{ + bool ret; + char *truncname = NULL; + size_t ulen = strlen(username); + + if (ulen == 0 || username[ulen-1] != '$') { + return false; + } + truncname = SMB_STRDUP(username); + if (!truncname) { + return false; + } + truncname[ulen-1] = '\0'; + ret = strequal(truncname, global_myname()); + SAFE_FREE(truncname); + return ret; +} + +/*************************************************************************** + Make (and fill) a user_info struct from a struct samu +***************************************************************************/ + +NTSTATUS make_server_info_sam(auth_serversupplied_info **server_info, + struct samu *sampass) +{ + struct passwd *pwd; + gid_t *gids; + auth_serversupplied_info *result; + int i; + size_t num_gids; + DOM_SID unix_group_sid; + const char *username = pdb_get_username(sampass); + NTSTATUS status; + + if ( !(result = make_server_info(NULL)) ) { + return NT_STATUS_NO_MEMORY; + } + + if ( !(pwd = getpwnam_alloc(result, username)) ) { + DEBUG(1, ("User %s in passdb, but getpwnam() fails!\n", + pdb_get_username(sampass))); + TALLOC_FREE(result); + return NT_STATUS_NO_SUCH_USER; + } + + result->sam_account = sampass; + /* Ensure thaat the sampass will be freed with the result */ + talloc_steal(result, sampass); + result->unix_name = pwd->pw_name; + /* Ensure that we keep pwd->pw_name, because we will free pwd below */ + talloc_steal(result, pwd->pw_name); + result->utok.gid = pwd->pw_gid; + result->utok.uid = pwd->pw_uid; + + TALLOC_FREE(pwd); + + result->sanitized_username = sanitize_username(result, + result->unix_name); + if (result->sanitized_username == NULL) { + TALLOC_FREE(result); + return NT_STATUS_NO_MEMORY; + } + + if (IS_DC && is_our_machine_account(username)) { + /* + * Ensure for a connection from our own + * machine account (from winbindd on a DC) + * there are no supplementary groups. + * Prevents loops in calling gid_to_sid(). + */ + result->sids = NULL; + gids = NULL; + result->num_sids = 0; + + /* + * This is a hack of monstrous proportions. + * If we know it's winbindd talking to us, + * we know we must never recurse into it, + * so turn off contacting winbindd for this + * entire process. This will get fixed when + * winbindd doesn't need to talk to smbd on + * a PDC. JRA. + */ + + (void)winbind_off(); + + DEBUG(10, ("make_server_info_sam: our machine account %s " + "setting supplementary group list empty and " + "turning off winbindd requests.\n", + username)); + } else { + status = pdb_enum_group_memberships(result, sampass, + &result->sids, &gids, + &result->num_sids); + + if (!NT_STATUS_IS_OK(status)) { + DEBUG(10, ("pdb_enum_group_memberships failed: %s\n", + nt_errstr(status))); + result->sam_account = NULL; /* Don't free on error exit. */ + TALLOC_FREE(result); + return status; + } + } + + /* Add the "Unix Group" SID for each gid to catch mapped groups + and their Unix equivalent. This is to solve the backwards + compatibility problem of 'valid users = +ntadmin' where + ntadmin has been paired with "Domain Admins" in the group + mapping table. Otherwise smb.conf would need to be changed + to 'valid user = "Domain Admins"'. --jerry */ + + num_gids = result->num_sids; + for ( i=0; i<num_gids; i++ ) { + if ( !gid_to_unix_groups_sid( gids[i], &unix_group_sid ) ) { + DEBUG(1,("make_server_info_sam: Failed to create SID " + "for gid %d!\n", gids[i])); + continue; + } + status = add_sid_to_array_unique(result, &unix_group_sid, + &result->sids, + &result->num_sids); + if (!NT_STATUS_IS_OK(status)) { + result->sam_account = NULL; /* Don't free on error exit. */ + TALLOC_FREE(result); + return status; + } + } + + /* For now we throw away the gids and convert via sid_to_gid + * later. This needs fixing, but I'd like to get the code straight and + * simple first. */ + + TALLOC_FREE(gids); + + DEBUG(5,("make_server_info_sam: made server info for user %s -> %s\n", + pdb_get_username(sampass), result->unix_name)); + + *server_info = result; + + return NT_STATUS_OK; +} + +static NTSTATUS log_nt_token(NT_USER_TOKEN *token) +{ + TALLOC_CTX *frame = talloc_stackframe(); + char *command; + char *group_sidstr; + size_t i; + + if ((lp_log_nt_token_command() == NULL) || + (strlen(lp_log_nt_token_command()) == 0)) { + TALLOC_FREE(frame); + return NT_STATUS_OK; + } + + group_sidstr = talloc_strdup(frame, ""); + for (i=1; i<token->num_sids; i++) { + group_sidstr = talloc_asprintf( + frame, "%s %s", group_sidstr, + sid_string_talloc(frame, &token->user_sids[i])); + } + + command = talloc_string_sub( + frame, lp_log_nt_token_command(), + "%s", sid_string_talloc(frame, &token->user_sids[0])); + command = talloc_string_sub(frame, command, "%t", group_sidstr); + + if (command == NULL) { + TALLOC_FREE(frame); + return NT_STATUS_NO_MEMORY; + } + + DEBUG(8, ("running command: [%s]\n", command)); + if (smbrun(command, NULL) != 0) { + DEBUG(0, ("Could not log NT token\n")); + TALLOC_FREE(frame); + return NT_STATUS_ACCESS_DENIED; + } + + TALLOC_FREE(frame); + return NT_STATUS_OK; +} + +/* + * Create the token to use from server_info->sam_account and + * server_info->sids (the info3/sam groups). Find the unix gids. + */ + +NTSTATUS create_local_token(auth_serversupplied_info *server_info) +{ + NTSTATUS status; + size_t i; + + /* + * If winbind is not around, we can not make much use of the SIDs the + * domain controller provided us with. Likewise if the user name was + * mapped to some local unix user. + */ + + if (((lp_server_role() == ROLE_DOMAIN_MEMBER) && !winbind_ping()) || + (server_info->nss_token)) { + status = create_token_from_username(server_info, + server_info->unix_name, + server_info->guest, + &server_info->utok.uid, + &server_info->utok.gid, + &server_info->unix_name, + &server_info->ptok); + + } else { + server_info->ptok = create_local_nt_token( + server_info, + pdb_get_user_sid(server_info->sam_account), + server_info->guest, + server_info->num_sids, server_info->sids); + status = server_info->ptok ? + NT_STATUS_OK : NT_STATUS_NO_SUCH_USER; + } + + if (!NT_STATUS_IS_OK(status)) { + return status; + } + + /* Convert the SIDs to gids. */ + + server_info->utok.ngroups = 0; + server_info->utok.groups = NULL; + + /* Start at index 1, where the groups start. */ + + for (i=1; i<server_info->ptok->num_sids; i++) { + gid_t gid; + DOM_SID *sid = &server_info->ptok->user_sids[i]; + + if (!sid_to_gid(sid, &gid)) { + DEBUG(10, ("Could not convert SID %s to gid, " + "ignoring it\n", sid_string_dbg(sid))); + continue; + } + add_gid_to_array_unique(server_info, gid, + &server_info->utok.groups, + &server_info->utok.ngroups); + } + + debug_nt_user_token(DBGC_AUTH, 10, server_info->ptok); + + status = log_nt_token(server_info->ptok); + return status; +} + +/* + * Create an artificial NT token given just a username. (Initially indended + * for force user) + * + * We go through lookup_name() to avoid problems we had with 'winbind use + * default domain'. + * + * We have 3 cases: + * + * unmapped unix users: Go directly to nss to find the user's group. + * + * A passdb user: The list of groups is provided by pdb_enum_group_memberships. + * + * If the user is provided by winbind, the primary gid is set to "domain + * users" of the user's domain. For an explanation why this is necessary, see + * the thread starting at + * http://lists.samba.org/archive/samba-technical/2006-January/044803.html. + */ + +NTSTATUS create_token_from_username(TALLOC_CTX *mem_ctx, const char *username, + bool is_guest, + uid_t *uid, gid_t *gid, + char **found_username, + struct nt_user_token **token) +{ + NTSTATUS result = NT_STATUS_NO_SUCH_USER; + TALLOC_CTX *tmp_ctx; + DOM_SID user_sid; + enum lsa_SidType type; + gid_t *gids; + DOM_SID *group_sids; + DOM_SID unix_group_sid; + size_t num_group_sids; + size_t num_gids; + size_t i; + + tmp_ctx = talloc_new(NULL); + if (tmp_ctx == NULL) { + DEBUG(0, ("talloc_new failed\n")); + return NT_STATUS_NO_MEMORY; + } + + if (!lookup_name_smbconf(tmp_ctx, username, LOOKUP_NAME_ALL, + NULL, NULL, &user_sid, &type)) { + DEBUG(1, ("lookup_name_smbconf for %s failed\n", username)); + goto done; + } + + if (type != SID_NAME_USER) { + DEBUG(1, ("%s is a %s, not a user\n", username, + sid_type_lookup(type))); + goto done; + } + + if (!sid_to_uid(&user_sid, uid)) { + DEBUG(1, ("sid_to_uid for %s (%s) failed\n", + username, sid_string_dbg(&user_sid))); + goto done; + } + + if (sid_check_is_in_our_domain(&user_sid)) { + bool ret; + + /* This is a passdb user, so ask passdb */ + + struct samu *sam_acct = NULL; + + if ( !(sam_acct = samu_new( tmp_ctx )) ) { + result = NT_STATUS_NO_MEMORY; + goto done; + } + + become_root(); + ret = pdb_getsampwsid(sam_acct, &user_sid); + unbecome_root(); + + if (!ret) { + DEBUG(1, ("pdb_getsampwsid(%s) for user %s failed\n", + sid_string_dbg(&user_sid), username)); + DEBUGADD(1, ("Fall back to unix user %s\n", username)); + goto unix_user; + } + + result = pdb_enum_group_memberships(tmp_ctx, sam_acct, + &group_sids, &gids, + &num_group_sids); + if (!NT_STATUS_IS_OK(result)) { + DEBUG(10, ("enum_group_memberships failed for %s\n", + username)); + DEBUGADD(1, ("Fall back to unix user %s\n", username)); + goto unix_user; + } + + /* see the smb_panic() in pdb_default_enum_group_memberships */ + SMB_ASSERT(num_group_sids > 0); + + *gid = gids[0]; + + /* Ensure we're returning the found_username on the right context. */ + *found_username = talloc_strdup(mem_ctx, + pdb_get_username(sam_acct)); + + } else if (sid_check_is_in_unix_users(&user_sid)) { + + /* This is a unix user not in passdb. We need to ask nss + * directly, without consulting passdb */ + + struct passwd *pass; + + /* + * This goto target is used as a fallback for the passdb + * case. The concrete bug report is when passdb gave us an + * unmapped gid. + */ + + unix_user: + + uid_to_unix_users_sid(*uid, &user_sid); + + pass = getpwuid_alloc(tmp_ctx, *uid); + if (pass == NULL) { + DEBUG(1, ("getpwuid(%d) for user %s failed\n", + *uid, username)); + goto done; + } + + if (!getgroups_unix_user(tmp_ctx, username, pass->pw_gid, + &gids, &num_group_sids)) { + DEBUG(1, ("getgroups_unix_user for user %s failed\n", + username)); + goto done; + } + + if (num_group_sids) { + group_sids = TALLOC_ARRAY(tmp_ctx, DOM_SID, num_group_sids); + if (group_sids == NULL) { + DEBUG(1, ("TALLOC_ARRAY failed\n")); + result = NT_STATUS_NO_MEMORY; + goto done; + } + } else { + group_sids = NULL; + } + + for (i=0; i<num_group_sids; i++) { + gid_to_sid(&group_sids[i], gids[i]); + } + + /* In getgroups_unix_user we always set the primary gid */ + SMB_ASSERT(num_group_sids > 0); + + *gid = gids[0]; + + /* Ensure we're returning the found_username on the right context. */ + *found_username = talloc_strdup(mem_ctx, pass->pw_name); + } else { + + /* This user is from winbind, force the primary gid to the + * user's "domain users" group. Under certain circumstances + * (user comes from NT4), this might be a loss of + * information. But we can not rely on winbind getting the + * correct info. AD might prohibit winbind looking up that + * information. */ + + uint32 dummy; + + num_group_sids = 1; + group_sids = TALLOC_ARRAY(tmp_ctx, DOM_SID, num_group_sids); + if (group_sids == NULL) { + DEBUG(1, ("TALLOC_ARRAY failed\n")); + result = NT_STATUS_NO_MEMORY; + goto done; + } + + sid_copy(&group_sids[0], &user_sid); + sid_split_rid(&group_sids[0], &dummy); + sid_append_rid(&group_sids[0], DOMAIN_GROUP_RID_USERS); + + if (!sid_to_gid(&group_sids[0], gid)) { + DEBUG(1, ("sid_to_gid(%s) failed\n", + sid_string_dbg(&group_sids[0]))); + goto done; + } + + gids = gid; + + /* Ensure we're returning the found_username on the right context. */ + *found_username = talloc_strdup(mem_ctx, username); + } + + /* Add the "Unix Group" SID for each gid to catch mapped groups + and their Unix equivalent. This is to solve the backwards + compatibility problem of 'valid users = +ntadmin' where + ntadmin has been paired with "Domain Admins" in the group + mapping table. Otherwise smb.conf would need to be changed + to 'valid user = "Domain Admins"'. --jerry */ + + num_gids = num_group_sids; + for ( i=0; i<num_gids; i++ ) { + gid_t high, low; + + /* don't pickup anything managed by Winbind */ + + if ( lp_idmap_gid(&low, &high) && (gids[i] >= low) && (gids[i] <= high) ) + continue; + + if ( !gid_to_unix_groups_sid( gids[i], &unix_group_sid ) ) { + DEBUG(1,("create_token_from_username: Failed to create SID " + "for gid %d!\n", gids[i])); + continue; + } + result = add_sid_to_array_unique(tmp_ctx, &unix_group_sid, + &group_sids, &num_group_sids); + if (!NT_STATUS_IS_OK(result)) { + goto done; + } + } + + /* Ensure we're creating the nt_token on the right context. */ + *token = create_local_nt_token(mem_ctx, &user_sid, + is_guest, num_group_sids, group_sids); + + if ((*token == NULL) || (*found_username == NULL)) { + result = NT_STATUS_NO_MEMORY; + goto done; + } + + result = NT_STATUS_OK; + done: + TALLOC_FREE(tmp_ctx); + return result; +} + +/*************************************************************************** + Build upon create_token_from_username: + + Expensive helper function to figure out whether a user given its name is + member of a particular group. +***************************************************************************/ + +bool user_in_group_sid(const char *username, const DOM_SID *group_sid) +{ + NTSTATUS status; + uid_t uid; + gid_t gid; + char *found_username; + struct nt_user_token *token; + bool result; + + TALLOC_CTX *mem_ctx; + + mem_ctx = talloc_new(NULL); + if (mem_ctx == NULL) { + DEBUG(0, ("talloc_new failed\n")); + return False; + } + + status = create_token_from_username(mem_ctx, username, False, + &uid, &gid, &found_username, + &token); + + if (!NT_STATUS_IS_OK(status)) { + DEBUG(10, ("could not create token for %s\n", username)); + return False; + } + + result = nt_token_check_sid(group_sid, token); + + TALLOC_FREE(mem_ctx); + return result; + +} + +bool user_in_group(const char *username, const char *groupname) +{ + TALLOC_CTX *mem_ctx; + DOM_SID group_sid; + bool ret; + + mem_ctx = talloc_new(NULL); + if (mem_ctx == NULL) { + DEBUG(0, ("talloc_new failed\n")); + return False; + } + + ret = lookup_name(mem_ctx, groupname, LOOKUP_NAME_ALL, + NULL, NULL, &group_sid, NULL); + TALLOC_FREE(mem_ctx); + + if (!ret) { + DEBUG(10, ("lookup_name for (%s) failed.\n", groupname)); + return False; + } + + return user_in_group_sid(username, &group_sid); +} + +/*************************************************************************** + Make (and fill) a server_info struct from a 'struct passwd' by conversion + to a struct samu +***************************************************************************/ + +NTSTATUS make_server_info_pw(auth_serversupplied_info **server_info, + char *unix_username, + struct passwd *pwd) +{ + NTSTATUS status; + struct samu *sampass = NULL; + gid_t *gids; + char *qualified_name = NULL; + TALLOC_CTX *mem_ctx = NULL; + DOM_SID u_sid; + enum lsa_SidType type; + auth_serversupplied_info *result; + + if ( !(sampass = samu_new( NULL )) ) { + return NT_STATUS_NO_MEMORY; + } + + status = samu_set_unix( sampass, pwd ); + if (!NT_STATUS_IS_OK(status)) { + return status; + } + + result = make_server_info(NULL); + if (result == NULL) { + TALLOC_FREE(sampass); + return NT_STATUS_NO_MEMORY; + } + + result->sam_account = sampass; + + result->unix_name = talloc_strdup(result, unix_username); + result->sanitized_username = sanitize_username(result, unix_username); + + if ((result->unix_name == NULL) + || (result->sanitized_username == NULL)) { + TALLOC_FREE(sampass); + TALLOC_FREE(result); + return NT_STATUS_NO_MEMORY; + } + + result->utok.uid = pwd->pw_uid; + result->utok.gid = pwd->pw_gid; + + status = pdb_enum_group_memberships(result, sampass, + &result->sids, &gids, + &result->num_sids); + + if (!NT_STATUS_IS_OK(status)) { + DEBUG(10, ("pdb_enum_group_memberships failed: %s\n", + nt_errstr(status))); + TALLOC_FREE(result); + return status; + } + + /* + * The SID returned in server_info->sam_account is based + * on our SAM sid even though for a pure UNIX account this should + * not be the case as it doesn't really exist in the SAM db. + * This causes lookups on "[in]valid users" to fail as they + * will lookup this name as a "Unix User" SID to check against + * the user token. Fix this by adding the "Unix User"\unix_username + * SID to the sid array. The correct fix should probably be + * changing the server_info->sam_account user SID to be a + * S-1-22 Unix SID, but this might break old configs where + * plaintext passwords were used with no SAM backend. + */ + + mem_ctx = talloc_init("make_server_info_pw_tmp"); + if (!mem_ctx) { + TALLOC_FREE(result); + return NT_STATUS_NO_MEMORY; + } + + qualified_name = talloc_asprintf(mem_ctx, "%s\\%s", + unix_users_domain_name(), + unix_username ); + if (!qualified_name) { + TALLOC_FREE(result); + TALLOC_FREE(mem_ctx); + return NT_STATUS_NO_MEMORY; + } + + if (!lookup_name(mem_ctx, qualified_name, LOOKUP_NAME_ALL, + NULL, NULL, + &u_sid, &type)) { + TALLOC_FREE(result); + TALLOC_FREE(mem_ctx); + return NT_STATUS_NO_SUCH_USER; + } + + TALLOC_FREE(mem_ctx); + + if (type != SID_NAME_USER) { + TALLOC_FREE(result); + return NT_STATUS_NO_SUCH_USER; + } + + status = add_sid_to_array_unique(result, &u_sid, + &result->sids, + &result->num_sids); + if (!NT_STATUS_IS_OK(status)) { + TALLOC_FREE(result); + return status; + } + + /* For now we throw away the gids and convert via sid_to_gid + * later. This needs fixing, but I'd like to get the code straight and + * simple first. */ + TALLOC_FREE(gids); + + *server_info = result; + + return NT_STATUS_OK; +} + +/*************************************************************************** + Make (and fill) a user_info struct for a guest login. + This *must* succeed for smbd to start. If there is no mapping entry for + the guest gid, then create one. +***************************************************************************/ + +static NTSTATUS make_new_server_info_guest(auth_serversupplied_info **server_info) +{ + NTSTATUS status; + struct samu *sampass = NULL; + DOM_SID guest_sid; + bool ret; + char zeros[16]; + fstring tmp; + + if ( !(sampass = samu_new( NULL )) ) { + return NT_STATUS_NO_MEMORY; + } + + sid_copy(&guest_sid, get_global_sam_sid()); + sid_append_rid(&guest_sid, DOMAIN_USER_RID_GUEST); + + become_root(); + ret = pdb_getsampwsid(sampass, &guest_sid); + unbecome_root(); + + if (!ret) { + TALLOC_FREE(sampass); + return NT_STATUS_NO_SUCH_USER; + } + + status = make_server_info_sam(server_info, sampass); + if (!NT_STATUS_IS_OK(status)) { + TALLOC_FREE(sampass); + return status; + } + + (*server_info)->guest = True; + + status = create_local_token(*server_info); + if (!NT_STATUS_IS_OK(status)) { + DEBUG(10, ("create_local_token failed: %s\n", + nt_errstr(status))); + return status; + } + + /* annoying, but the Guest really does have a session key, and it is + all zeros! */ + ZERO_STRUCT(zeros); + (*server_info)->user_session_key = data_blob(zeros, sizeof(zeros)); + (*server_info)->lm_session_key = data_blob(zeros, sizeof(zeros)); + + alpha_strcpy(tmp, pdb_get_username(sampass), ". _-$", sizeof(tmp)); + (*server_info)->sanitized_username = talloc_strdup(*server_info, tmp); + + return NT_STATUS_OK; +} + +/**************************************************************************** + Fake a auth_serversupplied_info just from a username +****************************************************************************/ + +NTSTATUS make_serverinfo_from_username(TALLOC_CTX *mem_ctx, + const char *username, + bool is_guest, + struct auth_serversupplied_info **presult) +{ + struct auth_serversupplied_info *result; + struct passwd *pwd; + NTSTATUS status; + + pwd = getpwnam_alloc(talloc_tos(), username); + if (pwd == NULL) { + return NT_STATUS_NO_SUCH_USER; + } + + status = make_server_info_pw(&result, pwd->pw_name, pwd); + + TALLOC_FREE(pwd); + + if (!NT_STATUS_IS_OK(status)) { + return status; + } + + result->nss_token = true; + result->guest = is_guest; + + status = create_local_token(result); + + if (!NT_STATUS_IS_OK(status)) { + TALLOC_FREE(result); + return status; + } + + *presult = result; + return NT_STATUS_OK; +} + + +struct auth_serversupplied_info *copy_serverinfo(TALLOC_CTX *mem_ctx, + auth_serversupplied_info *src) +{ + auth_serversupplied_info *dst; + + dst = make_server_info(mem_ctx); + if (dst == NULL) { + return NULL; + } + + dst->guest = src->guest; + dst->utok.uid = src->utok.uid; + dst->utok.gid = src->utok.gid; + dst->utok.ngroups = src->utok.ngroups; + if (src->utok.ngroups != 0) { + dst->utok.groups = (gid_t *)TALLOC_MEMDUP( + dst, src->utok.groups, + sizeof(gid_t)*dst->utok.ngroups); + } else { + dst->utok.groups = NULL; + } + + if (src->ptok) { + dst->ptok = dup_nt_token(dst, src->ptok); + if (!dst->ptok) { + TALLOC_FREE(dst); + return NULL; + } + } + + dst->user_session_key = data_blob_talloc( dst, src->user_session_key.data, + src->user_session_key.length); + + dst->lm_session_key = data_blob_talloc(dst, src->lm_session_key.data, + src->lm_session_key.length); + + dst->sam_account = samu_new(NULL); + if (!dst->sam_account) { + TALLOC_FREE(dst); + return NULL; + } + + if (!pdb_copy_sam_account(dst->sam_account, src->sam_account)) { + TALLOC_FREE(dst); + return NULL; + } + + dst->pam_handle = NULL; + dst->unix_name = talloc_strdup(dst, src->unix_name); + if (!dst->unix_name) { + TALLOC_FREE(dst); + return NULL; + } + + dst->sanitized_username = talloc_strdup(dst, src->sanitized_username); + if (!dst->sanitized_username) { + TALLOC_FREE(dst); + return NULL; + } + + return dst; +} + +/* + * Set a new session key. Used in the rpc server where we have to override the + * SMB level session key with SystemLibraryDTC + */ + +bool server_info_set_session_key(struct auth_serversupplied_info *info, + DATA_BLOB session_key) +{ + TALLOC_FREE(info->user_session_key.data); + + info->user_session_key = data_blob_talloc( + info, session_key.data, session_key.length); + + return (info->user_session_key.data != NULL); +} + +static auth_serversupplied_info *guest_info = NULL; + +bool init_guest_info(void) +{ + if (guest_info != NULL) + return True; + + return NT_STATUS_IS_OK(make_new_server_info_guest(&guest_info)); +} + +NTSTATUS make_server_info_guest(TALLOC_CTX *mem_ctx, + auth_serversupplied_info **server_info) +{ + *server_info = copy_serverinfo(mem_ctx, guest_info); + return (*server_info != NULL) ? NT_STATUS_OK : NT_STATUS_NO_MEMORY; +} + +bool copy_current_user(struct current_user *dst, struct current_user *src) +{ + gid_t *groups; + NT_USER_TOKEN *nt_token; + + groups = (gid_t *)memdup(src->ut.groups, + sizeof(gid_t) * src->ut.ngroups); + if ((src->ut.ngroups != 0) && (groups == NULL)) { + return False; + } + + nt_token = dup_nt_token(NULL, src->nt_user_token); + if (nt_token == NULL) { + SAFE_FREE(groups); + return False; + } + + dst->conn = src->conn; + dst->vuid = src->vuid; + dst->ut.uid = src->ut.uid; + dst->ut.gid = src->ut.gid; + dst->ut.ngroups = src->ut.ngroups; + dst->ut.groups = groups; + dst->nt_user_token = nt_token; + return True; +} + +/*************************************************************************** + 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, + struct samu *account, + bool *username_was_mapped) +{ + NTSTATUS nt_status; + fstring dom_user, lower_username; + fstring real_username; + struct passwd *passwd; + + fstrcpy( lower_username, username ); + strlower_m( lower_username ); + + fstr_sprintf(dom_user, "%s%c%s", domain, *lp_winbind_separator(), + lower_username); + + /* Get the passwd struct. Try to create the account is necessary. */ + + *username_was_mapped = map_username( dom_user ); + + if ( !(passwd = smb_getpwnam( NULL, dom_user, real_username, True )) ) + return NT_STATUS_NO_SUCH_USER; + + *uid = passwd->pw_uid; + *gid = passwd->pw_gid; + + /* This is pointless -- there is no suport for differing + 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, real_username ); + + DEBUG(5,("fill_sam_account: located username was [%s]\n", *found_username)); + + nt_status = samu_set_unix( account, passwd ); + + TALLOC_FREE(passwd); + + return nt_status; +} + +/**************************************************************************** + 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( TALLOC_CTX *mem_ctx, char *domuser, + fstring save_username, bool create ) +{ + struct passwd *pw = NULL; + char *p; + fstring username; + + /* we only save a copy of the username it has been mangled + by winbindd use default domain */ + + save_username[0] = '\0'; + + /* don't call map_username() here since it has to be done higher + up the stack so we don't call it mutliple times */ + + fstrcpy( username, domuser ); + + p = strchr_m( username, *lp_winbind_separator() ); + + /* code for a DOMAIN\user string */ + + if ( p ) { + fstring strip_username; + + pw = Get_Pwnam_alloc( mem_ctx, domuser ); + if ( pw ) { + /* make sure we get the case of the username correct */ + /* work around 'winbind use default domain = yes' */ + + if ( !strchr_m( pw->pw_name, *lp_winbind_separator() ) ) { + char *domain; + + /* split the domain and username into 2 strings */ + *p = '\0'; + domain = username; + + fstr_sprintf(save_username, "%s%c%s", domain, *lp_winbind_separator(), pw->pw_name); + } + else + fstrcpy( save_username, pw->pw_name ); + + /* whew -- done! */ + return pw; + } + + /* setup for lookup of just the username */ + /* remember that p and username are overlapping memory */ + + p++; + fstrcpy( strip_username, p ); + fstrcpy( username, strip_username ); + } + + /* just lookup a plain username */ + + pw = Get_Pwnam_alloc(mem_ctx, username); + + /* Create local user if requested but only if winbindd + is not running. We need to protect against cases + where winbindd is failing and then prematurely + creating users in /etc/passwd */ + + if ( !pw && create && !winbind_ping() ) { + /* Don't add a machine account. */ + if (username[strlen(username)-1] == '$') + return NULL; + + smb_create_user(NULL, username, NULL); + pw = Get_Pwnam_alloc(mem_ctx, username); + } + + /* one last check for a valid passwd struct */ + + if ( pw ) + fstrcpy( save_username, pw->pw_name ); + + 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 *sent_nt_username, + const char *domain, + auth_serversupplied_info **server_info, + struct netr_SamInfo3 *info3) +{ + char zeros[16]; + + NTSTATUS nt_status = NT_STATUS_OK; + char *found_username = NULL; + const char *nt_domain; + const char *nt_username; + struct samu *sam_account = NULL; + DOM_SID user_sid; + DOM_SID group_sid; + bool username_was_mapped; + + uid_t uid = (uid_t)-1; + gid_t gid = (gid_t)-1; + + auth_serversupplied_info *result; + + /* + Here is where we should check the list of + trusted domains, and verify that the SID + matches. + */ + + sid_copy(&user_sid, info3->base.domain_sid); + if (!sid_append_rid(&user_sid, info3->base.rid)) { + return NT_STATUS_INVALID_PARAMETER; + } + + sid_copy(&group_sid, info3->base.domain_sid); + if (!sid_append_rid(&group_sid, info3->base.primary_gid)) { + return NT_STATUS_INVALID_PARAMETER; + } + + nt_username = talloc_strdup(mem_ctx, info3->base.account_name.string); + if (!nt_username) { + /* If the server didn't give us one, just use the one we sent + * them */ + nt_username = sent_nt_username; + } + + nt_domain = talloc_strdup(mem_ctx, info3->base.domain.string); + if (!nt_domain) { + /* 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). + + We use the _unmapped_ username here in an attempt to provide + consistent username mapping behavior between kerberos and NTLM[SSP] + authentication in domain mode security. I.E. Username mapping + should be applied to the fully qualified username + (e.g. DOMAIN\user) and not just the login name. Yes this means we + called map_username() unnecessarily in make_user_info_map() but + that is how the current code is designed. Making the change here + is the least disruptive place. -- jerry */ + + if ( !(sam_account = samu_new( NULL )) ) { + return NT_STATUS_NO_MEMORY; + } + + /* this call will try to create the user if necessary */ + + nt_status = fill_sam_account(mem_ctx, nt_domain, sent_nt_username, + &found_username, &uid, &gid, sam_account, + &username_was_mapped); + + + /* if we still don't have a valid unix account check for + 'map to guest = bad uid' */ + + if (!NT_STATUS_IS_OK(nt_status)) { + TALLOC_FREE( sam_account ); + if ( lp_map_to_guest() == MAP_TO_GUEST_ON_BAD_UID ) { + make_server_info_guest(NULL, server_info); + return NT_STATUS_OK; + } + return nt_status; + } + + if (!pdb_set_nt_username(sam_account, nt_username, PDB_CHANGED)) { + TALLOC_FREE(sam_account); + return NT_STATUS_NO_MEMORY; + } + + if (!pdb_set_username(sam_account, nt_username, PDB_CHANGED)) { + TALLOC_FREE(sam_account); + return NT_STATUS_NO_MEMORY; + } + + if (!pdb_set_domain(sam_account, nt_domain, PDB_CHANGED)) { + TALLOC_FREE(sam_account); + return NT_STATUS_NO_MEMORY; + } + + if (!pdb_set_user_sid(sam_account, &user_sid, PDB_CHANGED)) { + TALLOC_FREE(sam_account); + return NT_STATUS_UNSUCCESSFUL; + } + + if (!pdb_set_group_sid(sam_account, &group_sid, PDB_CHANGED)) { + TALLOC_FREE(sam_account); + return NT_STATUS_UNSUCCESSFUL; + } + + if (!pdb_set_fullname(sam_account, + info3->base.full_name.string, + PDB_CHANGED)) { + TALLOC_FREE(sam_account); + return NT_STATUS_NO_MEMORY; + } + + if (!pdb_set_logon_script(sam_account, + info3->base.logon_script.string, + PDB_CHANGED)) { + TALLOC_FREE(sam_account); + return NT_STATUS_NO_MEMORY; + } + + if (!pdb_set_profile_path(sam_account, + info3->base.profile_path.string, + PDB_CHANGED)) { + TALLOC_FREE(sam_account); + return NT_STATUS_NO_MEMORY; + } + + if (!pdb_set_homedir(sam_account, + info3->base.home_directory.string, + PDB_CHANGED)) { + TALLOC_FREE(sam_account); + return NT_STATUS_NO_MEMORY; + } + + if (!pdb_set_dir_drive(sam_account, + info3->base.home_drive.string, + PDB_CHANGED)) { + TALLOC_FREE(sam_account); + return NT_STATUS_NO_MEMORY; + } + + if (!pdb_set_acct_ctrl(sam_account, info3->base.acct_flags, PDB_CHANGED)) { + TALLOC_FREE(sam_account); + return NT_STATUS_NO_MEMORY; + } + + if (!pdb_set_pass_last_set_time( + sam_account, + nt_time_to_unix(info3->base.last_password_change), + PDB_CHANGED)) { + TALLOC_FREE(sam_account); + return NT_STATUS_NO_MEMORY; + } + + if (!pdb_set_pass_can_change_time( + sam_account, + nt_time_to_unix(info3->base.allow_password_change), + PDB_CHANGED)) { + TALLOC_FREE(sam_account); + return NT_STATUS_NO_MEMORY; + } + + if (!pdb_set_pass_must_change_time( + sam_account, + nt_time_to_unix(info3->base.force_password_change), + PDB_CHANGED)) { + TALLOC_FREE(sam_account); + return NT_STATUS_NO_MEMORY; + } + + result = make_server_info(NULL); + if (result == NULL) { + DEBUG(4, ("make_server_info failed!\n")); + TALLOC_FREE(sam_account); + return NT_STATUS_NO_MEMORY; + } + + /* save this here to _net_sam_logon() doesn't fail (it assumes a + valid struct samu) */ + + result->sam_account = sam_account; + result->unix_name = talloc_strdup(result, found_username); + + result->sanitized_username = sanitize_username(result, + result->unix_name); + if (result->sanitized_username == NULL) { + TALLOC_FREE(result); + return NT_STATUS_NO_MEMORY; + } + + /* Fill in the unix info we found on the way */ + + result->utok.uid = uid; + result->utok.gid = gid; + + /* Create a 'combined' list of all SIDs we might want in the SD */ + + result->num_sids = 0; + result->sids = NULL; + + nt_status = sid_array_from_info3(result, info3, + &result->sids, + &result->num_sids, + false, false); + if (!NT_STATUS_IS_OK(nt_status)) { + TALLOC_FREE(result); + return nt_status; + } + + /* Ensure the primary group sid is at position 0. */ + sort_sid_array_for_smbd(result, &group_sid); + + result->login_server = talloc_strdup(result, + info3->base.logon_server.string); + + /* ensure we are never given NULL session keys */ + + ZERO_STRUCT(zeros); + + if (memcmp(info3->base.key.key, zeros, sizeof(zeros)) == 0) { + result->user_session_key = data_blob_null; + } else { + result->user_session_key = data_blob_talloc( + result, info3->base.key.key, + sizeof(info3->base.key.key)); + } + + if (memcmp(info3->base.LMSessKey.key, zeros, 8) == 0) { + result->lm_session_key = data_blob_null; + } else { + result->lm_session_key = data_blob_talloc( + result, info3->base.LMSessKey.key, + sizeof(info3->base.LMSessKey.key)); + } + + result->nss_token |= username_was_mapped; + + *server_info = result; + + return NT_STATUS_OK; +} + +/***************************************************************************** + Make a server_info struct from the wbcAuthUserInfo returned by a domain logon +******************************************************************************/ + +NTSTATUS make_server_info_wbcAuthUserInfo(TALLOC_CTX *mem_ctx, + const char *sent_nt_username, + const char *domain, + const struct wbcAuthUserInfo *info, + auth_serversupplied_info **server_info) +{ + char zeros[16]; + + NTSTATUS nt_status = NT_STATUS_OK; + char *found_username = NULL; + const char *nt_domain; + const char *nt_username; + struct samu *sam_account = NULL; + DOM_SID user_sid; + DOM_SID group_sid; + bool username_was_mapped; + uint32_t i; + + uid_t uid = (uid_t)-1; + gid_t gid = (gid_t)-1; + + auth_serversupplied_info *result; + + result = make_server_info(NULL); + if (result == NULL) { + DEBUG(4, ("make_server_info failed!\n")); + return NT_STATUS_NO_MEMORY; + } + + /* + Here is where we should check the list of + trusted domains, and verify that the SID + matches. + */ + + memcpy(&user_sid, &info->sids[0].sid, sizeof(user_sid)); + memcpy(&group_sid, &info->sids[1].sid, sizeof(group_sid)); + + if (info->account_name) { + nt_username = talloc_strdup(result, info->account_name); + } else { + /* If the server didn't give us one, just use the one we sent + * them */ + nt_username = talloc_strdup(result, sent_nt_username); + } + if (!nt_username) { + TALLOC_FREE(result); + return NT_STATUS_NO_MEMORY; + } + + if (info->domain_name) { + nt_domain = talloc_strdup(result, info->domain_name); + } else { + /* If the server didn't give us one, just use the one we sent + * them */ + nt_domain = talloc_strdup(result, domain); + } + if (!nt_domain) { + TALLOC_FREE(result); + return NT_STATUS_NO_MEMORY; + } + + /* try to fill the SAM account.. If getpwnam() fails, then try the + add user script (2.2.x behavior). + + We use the _unmapped_ username here in an attempt to provide + consistent username mapping behavior between kerberos and NTLM[SSP] + authentication in domain mode security. I.E. Username mapping + should be applied to the fully qualified username + (e.g. DOMAIN\user) and not just the login name. Yes this means we + called map_username() unnecessarily in make_user_info_map() but + that is how the current code is designed. Making the change here + is the least disruptive place. -- jerry */ + + if ( !(sam_account = samu_new( result )) ) { + TALLOC_FREE(result); + return NT_STATUS_NO_MEMORY; + } + + /* this call will try to create the user if necessary */ + + nt_status = fill_sam_account(result, nt_domain, sent_nt_username, + &found_username, &uid, &gid, sam_account, + &username_was_mapped); + + /* if we still don't have a valid unix account check for + 'map to guest = bad uid' */ + + if (!NT_STATUS_IS_OK(nt_status)) { + TALLOC_FREE( result ); + if ( lp_map_to_guest() == MAP_TO_GUEST_ON_BAD_UID ) { + make_server_info_guest(NULL, server_info); + return NT_STATUS_OK; + } + return nt_status; + } + + if (!pdb_set_nt_username(sam_account, nt_username, PDB_CHANGED)) { + TALLOC_FREE(result); + return NT_STATUS_NO_MEMORY; + } + + if (!pdb_set_username(sam_account, nt_username, PDB_CHANGED)) { + TALLOC_FREE(result); + return NT_STATUS_NO_MEMORY; + } + + if (!pdb_set_domain(sam_account, nt_domain, PDB_CHANGED)) { + TALLOC_FREE(result); + return NT_STATUS_NO_MEMORY; + } + + if (!pdb_set_user_sid(sam_account, &user_sid, PDB_CHANGED)) { + TALLOC_FREE(result); + return NT_STATUS_UNSUCCESSFUL; + } + + if (!pdb_set_group_sid(sam_account, &group_sid, PDB_CHANGED)) { + TALLOC_FREE(result); + return NT_STATUS_UNSUCCESSFUL; + } + + if (!pdb_set_fullname(sam_account, info->full_name, PDB_CHANGED)) { + TALLOC_FREE(result); + return NT_STATUS_NO_MEMORY; + } + + if (!pdb_set_logon_script(sam_account, info->logon_script, PDB_CHANGED)) { + TALLOC_FREE(result); + return NT_STATUS_NO_MEMORY; + } + + if (!pdb_set_profile_path(sam_account, info->profile_path, PDB_CHANGED)) { + TALLOC_FREE(result); + return NT_STATUS_NO_MEMORY; + } + + if (!pdb_set_homedir(sam_account, info->home_directory, PDB_CHANGED)) { + TALLOC_FREE(result); + return NT_STATUS_NO_MEMORY; + } + + if (!pdb_set_dir_drive(sam_account, info->home_drive, PDB_CHANGED)) { + TALLOC_FREE(result); + return NT_STATUS_NO_MEMORY; + } + + if (!pdb_set_acct_ctrl(sam_account, info->acct_flags, PDB_CHANGED)) { + TALLOC_FREE(result); + return NT_STATUS_NO_MEMORY; + } + + if (!pdb_set_pass_last_set_time( + sam_account, + nt_time_to_unix(info->pass_last_set_time), + PDB_CHANGED)) { + TALLOC_FREE(result); + return NT_STATUS_NO_MEMORY; + } + + if (!pdb_set_pass_can_change_time( + sam_account, + nt_time_to_unix(info->pass_can_change_time), + PDB_CHANGED)) { + TALLOC_FREE(result); + return NT_STATUS_NO_MEMORY; + } + + if (!pdb_set_pass_must_change_time( + sam_account, + nt_time_to_unix(info->pass_must_change_time), + PDB_CHANGED)) { + TALLOC_FREE(result); + return NT_STATUS_NO_MEMORY; + } + + /* save this here to _net_sam_logon() doesn't fail (it assumes a + valid struct samu) */ + + result->sam_account = sam_account; + result->unix_name = talloc_strdup(result, found_username); + + result->sanitized_username = sanitize_username(result, + result->unix_name); + result->login_server = talloc_strdup(result, info->logon_server); + + if ((result->unix_name == NULL) + || (result->sanitized_username == NULL) + || (result->login_server == NULL)) { + TALLOC_FREE(result); + return NT_STATUS_NO_MEMORY; + } + + /* Fill in the unix info we found on the way */ + + result->utok.uid = uid; + result->utok.gid = gid; + + /* Create a 'combined' list of all SIDs we might want in the SD */ + + result->num_sids = info->num_sids - 2; + result->sids = talloc_array(result, DOM_SID, result->num_sids); + if (result->sids == NULL) { + TALLOC_FREE(result); + return NT_STATUS_NO_MEMORY; + } + + for (i=0; i < result->num_sids; i++) { + memcpy(&result->sids[i], &info->sids[i+2].sid, sizeof(result->sids[i])); + } + + /* Ensure the primary group sid is at position 0. */ + sort_sid_array_for_smbd(result, &group_sid); + + /* ensure we are never given NULL session keys */ + + ZERO_STRUCT(zeros); + + if (memcmp(info->user_session_key, zeros, sizeof(zeros)) == 0) { + result->user_session_key = data_blob_null; + } else { + result->user_session_key = data_blob_talloc( + result, info->user_session_key, + sizeof(info->user_session_key)); + } + + if (memcmp(info->lm_session_key, zeros, 8) == 0) { + result->lm_session_key = data_blob_null; + } else { + result->lm_session_key = data_blob_talloc( + result, info->lm_session_key, + sizeof(info->lm_session_key)); + } + + result->nss_token |= username_was_mapped; + + *server_info = result; + + 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) { + DEBUG(10,("structure was created for %s\n", + (*user_info)->smb_name)); + } + SAFE_FREE((*user_info)->smb_name); + SAFE_FREE((*user_info)->internal_username); + SAFE_FREE((*user_info)->client_domain); + SAFE_FREE((*user_info)->domain); + SAFE_FREE((*user_info)->wksta_name); + data_blob_free(&(*user_info)->lm_resp); + data_blob_free(&(*user_info)->nt_resp); + data_blob_clear_free(&(*user_info)->lm_interactive_pwd); + data_blob_clear_free(&(*user_info)->nt_interactive_pwd); + data_blob_clear_free(&(*user_info)->plaintext_password); + ZERO_STRUCT(**user_info); + } + SAFE_FREE(*user_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_P(auth_context->mem_ctx, auth_methods); + if (!*auth_method) { + DEBUG(0,("make_auth_method: malloc failed!\n")); + return False; + } + ZERO_STRUCTP(*auth_method); + + return True; +} + +/** + * 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; + 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 ( IS_DC ) { + become_root(); + DEBUG (5,("is_trusted_domain: Checking for domain trust with " + "[%s]\n", dom_name )); + ret = pdb_get_trusteddom_pw(dom_name, NULL, NULL, NULL); + unbecome_root(); + if (ret) + return True; + } + else { + wbcErr result; + + /* If winbind is around, ask it */ + + result = wb_is_trusted_domain(dom_name); + + if (result == WBC_ERR_SUCCESS) { + return True; + } + + if (result == WBC_ERR_DOMAIN_NOT_FOUND) { + /* winbind could not find the domain */ + return False; + } + + /* The only other possible result is that winbind is not up + and running. We need to update the trustdom_cache + ourselves */ + + 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; +} + |