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Diffstat (limited to 'source/auth/auth_util.c')
| -rw-r--r-- | source/auth/auth_util.c | 1500 |
1 files changed, 1500 insertions, 0 deletions
diff --git a/source/auth/auth_util.c b/source/auth/auth_util.c new file mode 100644 index 00000000000..a823991bcad --- /dev/null +++ b/source/auth/auth_util.c @@ -0,0 +1,1500 @@ +/* + 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; +} + +/****************************************************************************** + * this function returns the groups (SIDs) of the local SAM the user is in. + * If this samba server is a DC of the domain the user belongs to, it returns + * both domain groups and local / builtin groups. If the user is in a trusted + * domain, or samba is a member server of a domain, then this function returns + * local and builtin groups the user is a member of. + * + * currently this is a hack, as there is no sam implementation that is capable + * of groups. + * + * NOTE!! This function will fail if you pass in a winbind user without + * the domain --jerry + ******************************************************************************/ + +static NTSTATUS get_user_groups(const char *username, uid_t uid, gid_t gid, + int *n_groups, DOM_SID **groups, gid_t **unix_groups) +{ + int n_unix_groups; + int i; + + *n_groups = 0; + *groups = NULL; + + /* Try winbind first */ + + if ( strchr(username, *lp_winbind_separator()) ) { + n_unix_groups = winbind_getgroups( username, unix_groups ); + + DEBUG(10,("get_user_groups: winbind_getgroups(%s): result = %s\n", username, + n_unix_groups == -1 ? "FAIL" : "SUCCESS")); + + if ( n_unix_groups == -1 ) + return NT_STATUS_NO_SUCH_USER; /* what should this return value be? */ + } + else { + /* fallback to getgrouplist() */ + + n_unix_groups = groups_max(); + + if ((*unix_groups = malloc( sizeof(gid_t) * n_unix_groups ) ) == NULL) { + DEBUG(0, ("get_user_groups: Out of memory allocating unix group list\n")); + return NT_STATUS_NO_MEMORY; + } + + if (sys_getgrouplist(username, gid, *unix_groups, &n_unix_groups) == -1) { + + gid_t *groups_tmp; + + groups_tmp = Realloc(*unix_groups, sizeof(gid_t) * n_unix_groups); + + if (!groups_tmp) { + SAFE_FREE(*unix_groups); + return NT_STATUS_NO_MEMORY; + } + *unix_groups = groups_tmp; + + if (sys_getgrouplist(username, gid, *unix_groups, &n_unix_groups) == -1) { + DEBUG(0, ("get_user_groups: failed to get the unix group list\n")); + SAFE_FREE(*unix_groups); + return NT_STATUS_NO_SUCH_USER; /* what should this return value be? */ + } + } + } + + debug_unix_user_token(DBGC_CLASS, 5, uid, gid, n_unix_groups, *unix_groups); + + /* now setup the space for storing the SIDS */ + + if (n_unix_groups > 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, + const char * unix_username, + 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(unix_username, 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; +} + +/*************************************************************************** +Fill a server_info struct from a SAM_ACCOUNT with its privileges +***************************************************************************/ + +static NTSTATUS add_privileges(auth_serversupplied_info **server_info) +{ + PRIVILEGE_SET *privs = NULL; + + init_privilege(&privs); + if (!pdb_get_privilege_set((*server_info)->ptok->user_sids, (*server_info)->ptok->num_sids, privs)) + DEBUG(1, ("Could not add privileges\n")); + + (*server_info)->privs = privs; + + return NT_STATUS_OK; +} + +/*************************************************************************** + 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, pdb_get_username(sampass), + sampass, + (*server_info)->uid, + (*server_info)->gid))) + { + free_server_info(server_info); + return nt_status; + } + + if (!NT_STATUS_IS_OK(nt_status = add_privileges(server_info))) { + 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, + char *unix_username, + 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, unix_username, + sampass, pwd->pw_uid, pwd->pw_gid))) + { + return nt_status; + } + + (*server_info)->unix_name = smb_xstrdup(unix_username); + + (*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; + fstring real_username; + struct passwd *passwd; + + fstr_sprintf(dom_user, "%s%s%s", domain, lp_winbind_separator(), + username); + + /* get the passwd struct but don't create the user if he/she + does not exist. We were explicitly called from a following + a winbindd authentication request so we should assume that + nss_winbindd is working */ + + if ( !(passwd = smb_getpwnam( 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)); + + 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, fstring save_username, BOOL create ) +{ + struct passwd *pw = NULL; + char *p; + fstring mapped_username; + fstring strip_username; + + /* we only save a copy of the username it has been mangled + by winbindd use default domain */ + + save_username[0] = '\0'; + + /* save a local copy of the username and run it through the + username map */ + + fstrcpy( mapped_username, domuser ); + map_username( mapped_username ); + + p = strchr_m( mapped_username, *lp_winbind_separator() ); + + /* code for a DOMAIN\user string */ + + if ( p ) { + pw = Get_Pwnam( 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; + + domain = mapped_username; + *p = '\0'; + 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 mapped_username are overlapping memory */ + + p++; + fstrcpy( strip_username, p ); + fstrcpy( mapped_username, strip_username ); + } + + /* just lookup a plain username */ + + pw = Get_Pwnam(mapped_username); + + /* Create local user if requested. */ + + if ( !pw && create ) { + /* Don't add a machine account. */ + if (mapped_username[strlen(mapped_username)-1] == '$') + return NULL; + + auth_add_user_script(NULL, mapped_username); + pw = Get_Pwnam(mapped_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 *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; +} + |