Fix bug #9039 'map untrusted to domain' treats WORKSTATION as bogus domain.
[metze/samba/wip.git] / source3 / auth / auth_util.c
index 607523255e28d8017bff06ea9c29da989f3e811e..ceaa7064d5908d19347f696ee013c0b9a34a5d77 100644 (file)
@@ -33,6 +33,7 @@
 #include "../librpc/gen_ndr/ndr_auth.h"
 #include "../auth/auth_sam_reply.h"
 #include "../librpc/gen_ndr/idmap.h"
+#include "lib/param/loadparm.h"
 
 #undef DBGC_CLASS
 #define DBGC_CLASS DBGC_AUTH
@@ -47,7 +48,7 @@ static int _smb_create_user(const char *domain, const char *unix_username, const
        char *add_script;
        int ret;
 
-       add_script = talloc_strdup(ctx, lp_adduser_script());
+       add_script = lp_adduser_script(ctx);
        if (!add_script || !*add_script) {
                return -1;
        }
@@ -124,7 +125,8 @@ NTSTATUS make_user_info_map(struct auth_usersupplied_info **user_info,
         * This also deals with the client passing in a "" domain */
 
        if (!is_trusted_domain(domain) &&
-           !strequal(domain, my_sam_name()))
+           !strequal(domain, my_sam_name()) &&
+           !strequal(domain, get_global_sam_name()))
        {
                if (lp_map_untrusted_to_domain())
                        domain = my_sam_name();
@@ -206,16 +208,12 @@ bool make_user_info_netlogon_interactive(struct auth_usersupplied_info **user_in
                                         uint32 logon_parameters,
                                         const uchar chal[8], 
                                         const uchar lm_interactive_pwd[16], 
-                                        const uchar nt_interactive_pwd[16], 
-                                        const uchar *dc_sess_key)
+                                        const uchar nt_interactive_pwd[16])
 {
        struct samr_Password lm_pwd;
        struct samr_Password nt_pwd;
        unsigned char local_lm_response[24];
        unsigned char local_nt_response[24];
-       unsigned char key[16];
-
-       memcpy(key, dc_sess_key, 16);
 
        if (lm_interactive_pwd)
                memcpy(lm_pwd.hash, lm_interactive_pwd, sizeof(lm_pwd.hash));
@@ -223,31 +221,6 @@ bool make_user_info_netlogon_interactive(struct auth_usersupplied_info **user_in
        if (nt_interactive_pwd)
                memcpy(nt_pwd.hash, nt_interactive_pwd, sizeof(nt_pwd.hash));
 
-#ifdef DEBUG_PASSWORD
-       DEBUG(100,("key:"));
-       dump_data(100, key, sizeof(key));
-
-       DEBUG(100,("lm owf password:"));
-       dump_data(100, lm_pwd.hash, sizeof(lm_pwd.hash));
-
-       DEBUG(100,("nt owf password:"));
-       dump_data(100, nt_pwd.hash, sizeof(nt_pwd.hash));
-#endif
-
-       if (lm_interactive_pwd)
-               arcfour_crypt(lm_pwd.hash, key, sizeof(lm_pwd.hash));
-
-       if (nt_interactive_pwd)
-               arcfour_crypt(nt_pwd.hash, key, sizeof(nt_pwd.hash));
-
-#ifdef DEBUG_PASSWORD
-       DEBUG(100,("decrypt of lm owf password:"));
-       dump_data(100, lm_pwd.hash, sizeof(lm_pwd));
-
-       DEBUG(100,("decrypt of nt owf password:"));
-       dump_data(100, nt_pwd.hash, sizeof(nt_pwd));
-#endif
-
        if (lm_interactive_pwd)
                SMBOWFencrypt(lm_pwd.hash, chal,
                              local_lm_response);
@@ -256,14 +229,11 @@ bool make_user_info_netlogon_interactive(struct auth_usersupplied_info **user_in
                SMBOWFencrypt(nt_pwd.hash, 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 local_lm_blob = data_blob_null;
+               DATA_BLOB local_nt_blob = data_blob_null;
 
                if (lm_interactive_pwd) {
                        local_lm_blob = data_blob(local_lm_response,
@@ -416,8 +386,8 @@ static NTSTATUS log_nt_token(struct security_token *token)
        char *group_sidstr;
        size_t i;
 
-       if ((lp_log_nt_token_command() == NULL) ||
-           (strlen(lp_log_nt_token_command()) == 0)) {
+       if ((lp_log_nt_token_command(frame) == NULL) ||
+           (strlen(lp_log_nt_token_command(frame)) == 0)) {
                TALLOC_FREE(frame);
                return NT_STATUS_OK;
        }
@@ -430,7 +400,7 @@ static NTSTATUS log_nt_token(struct security_token *token)
        }
 
        command = talloc_string_sub(
-               frame, lp_log_nt_token_command(),
+               frame, lp_log_nt_token_command(frame),
                "%s", sid_string_talloc(frame, &token->sids[0]));
        command = talloc_string_sub(frame, command, "%t", group_sidstr);
 
@@ -506,8 +476,6 @@ NTSTATUS create_local_token(TALLOC_CTX *mem_ctx,
        session_info->unix_info->sanitized_username =
                                talloc_strdup(session_info->unix_info, tmp);
 
-       session_info->unix_info->system = server_info->system;
-
        if (session_key) {
                data_blob_free(&session_info->session_key);
                session_info->session_key = data_blob_talloc(session_info,
@@ -533,9 +501,8 @@ NTSTATUS create_local_token(TALLOC_CTX *mem_ctx,
 
        if (server_info->security_token) {
                /* Just copy the token, it has already been finalised
-                * (nasty hack to support a cached guest session_info,
-                * and a possible strategy for auth_samba4 to pass in
-                * a finalised session) */
+                * (nasty hack to support a cached guest/system session_info
+                */
 
                session_info->security_token = dup_nt_token(session_info, server_info->security_token);
                if (!session_info->security_token) {
@@ -771,6 +738,40 @@ NTSTATUS make_server_info_pw(struct auth_serversupplied_info **server_info,
        return NT_STATUS_OK;
 }
 
+static NTSTATUS get_system_info3(TALLOC_CTX *mem_ctx,
+                                struct netr_SamInfo3 *info3)
+{
+       NTSTATUS status;
+       struct dom_sid *system_sid;
+
+       /* Set account name */
+       init_lsa_String(&info3->base.account_name, "SYSTEM");
+
+       /* Set domain name */
+       init_lsa_StringLarge(&info3->base.logon_domain, "NT AUTHORITY");
+
+
+       /* The SID set here will be overwirtten anyway, but try and make it SID_NT_SYSTEM anyway */
+       /* Domain sid is NT_AUTHORITY */
+       
+       system_sid = dom_sid_parse_talloc(mem_ctx, SID_NT_SYSTEM);
+       if (system_sid == NULL) {
+               return NT_STATUS_NO_MEMORY;
+       }
+       
+       status = dom_sid_split_rid(mem_ctx, system_sid, &info3->base.domain_sid, 
+                                  &info3->base.rid);
+       TALLOC_FREE(system_sid);
+       if (!NT_STATUS_IS_OK(status)) {
+               return status;
+       }
+       
+       /* Primary gid is the same */
+       info3->base.primary_gid = info3->base.rid;
+
+       return NT_STATUS_OK;
+}
+
 static NTSTATUS get_guest_info3(TALLOC_CTX *mem_ctx,
                                struct netr_SamInfo3 *info3)
 {
@@ -812,7 +813,7 @@ static NTSTATUS get_guest_info3(TALLOC_CTX *mem_ctx,
        info3->base.rid = DOMAIN_RID_GUEST;
 
        /* Primary gid */
-       info3->base.primary_gid = BUILTIN_RID_GUESTS;
+       info3->base.primary_gid = DOMAIN_RID_GUESTS;
 
        /* Set as guest */
        info3->base.user_flags = NETLOGON_GUEST;
@@ -892,35 +893,6 @@ done:
        return status;
 }
 
-/****************************************************************************
-  Fake a auth_session_info just from a username (as a
-  session_info structure, with create_local_token() already called on
-  it.
-****************************************************************************/
-
-static NTSTATUS make_session_info_from_pw(TALLOC_CTX *mem_ctx,
-                                         struct passwd *pwd,
-                                         bool is_guest,
-                                         struct auth_session_info **session_info)
-{
-       struct auth_serversupplied_info *result;
-       NTSTATUS status;
-
-       status = make_server_info_pw(&result, pwd->pw_name, pwd);
-
-       if (!NT_STATUS_IS_OK(status)) {
-               return status;
-       }
-
-       result->nss_token = true;
-       result->guest = is_guest;
-
-       /* Now turn the server_info into a session_info with the full token etc */
-       status = create_local_token(mem_ctx, result, NULL, pwd->pw_name, session_info);
-       talloc_free(result);
-       return status;
-}
-
 /***************************************************************************
  Make (and fill) a auth_session_info struct for a system user login.
  This *must* succeed for smbd to start.
@@ -929,35 +901,81 @@ static NTSTATUS make_session_info_from_pw(TALLOC_CTX *mem_ctx,
 static NTSTATUS make_new_session_info_system(TALLOC_CTX *mem_ctx,
                                            struct auth_session_info **session_info)
 {
-       struct passwd *pwd;
        NTSTATUS status;
+       struct auth_serversupplied_info *server_info;
+       TALLOC_CTX *tmp_ctx;
 
-       pwd = getpwuid_alloc(mem_ctx, sec_initial_uid());
-       if (pwd == NULL) {
-               return NT_STATUS_NO_SUCH_USER;
+       tmp_ctx = talloc_stackframe();
+       if (tmp_ctx == NULL) {
+               return NT_STATUS_NO_MEMORY;
        }
 
-       status = make_session_info_from_pw(mem_ctx,
-                                          pwd,
-                                          false,
-                                          session_info);
-       TALLOC_FREE(pwd);
+       server_info = make_server_info(tmp_ctx);
+       if (!server_info) {
+               status = NT_STATUS_NO_MEMORY;
+               DEBUG(0, ("failed making server_info\n"));
+               goto done;
+       }
+
+       server_info->info3 = talloc_zero(server_info, struct netr_SamInfo3);
+       if (!server_info->info3) {
+               status = NT_STATUS_NO_MEMORY;
+               DEBUG(0, ("talloc failed setting info3\n"));
+               goto done;
+       }
+
+       status = get_system_info3(server_info, server_info->info3);
        if (!NT_STATUS_IS_OK(status)) {
-               return status;
+               DEBUG(0, ("Failed creating system info3 with %s\n",
+                         nt_errstr(status)));
+               goto done;
        }
 
-       (*session_info)->unix_info->system = true;
+       server_info->utok.uid = sec_initial_uid();
+       server_info->utok.gid = sec_initial_gid();
+       server_info->unix_name = talloc_asprintf(server_info,
+                                                "NT AUTHORITY%cSYSTEM",
+                                                *lp_winbind_separator());
+
+       if (!server_info->unix_name) {
+               status = NT_STATUS_NO_MEMORY;
+               DEBUG(0, ("talloc_asprintf failed setting unix_name\n"));
+               goto done;
+       }
 
-       status = add_sid_to_array_unique((*session_info)->security_token->sids,
+       server_info->security_token = talloc_zero(server_info, struct security_token);
+       if (!server_info->security_token) {
+               status = NT_STATUS_NO_MEMORY;
+               DEBUG(0, ("talloc failed setting security token\n"));
+               goto done;
+       }
+
+       status = add_sid_to_array_unique(server_info->security_token->sids,
                                         &global_sid_System,
-                                        &(*session_info)->security_token->sids,
-                                        &(*session_info)->security_token->num_sids);
+                                        &server_info->security_token->sids,
+                                        &server_info->security_token->num_sids);
        if (!NT_STATUS_IS_OK(status)) {
-               TALLOC_FREE((*session_info));
-               return status;
+               goto done;
        }
 
-       return NT_STATUS_OK;
+       /* SYSTEM has all privilages */
+       server_info->security_token->privilege_mask = ~0;
+
+       /* Now turn the server_info into a session_info with the full token etc */
+       status = create_local_token(mem_ctx, server_info, NULL, "SYSTEM", session_info);
+       talloc_free(server_info);
+
+       if (!NT_STATUS_IS_OK(status)) {
+               DEBUG(0, ("create_local_token failed: %s\n",
+                         nt_errstr(status)));
+               goto done;
+       }
+
+       talloc_steal(mem_ctx, *session_info);
+
+done:
+       TALLOC_FREE(tmp_ctx);
+       return status;
 }
 
 /****************************************************************************
@@ -973,20 +991,27 @@ NTSTATUS make_session_info_from_username(TALLOC_CTX *mem_ctx,
 {
        struct passwd *pwd;
        NTSTATUS status;
+       struct auth_serversupplied_info *result;
 
        pwd = Get_Pwnam_alloc(talloc_tos(), username);
        if (pwd == NULL) {
                return NT_STATUS_NO_SUCH_USER;
        }
 
-       status = make_session_info_from_pw(mem_ctx, pwd, is_guest, session_info);
+       status = make_server_info_pw(&result, pwd->pw_name, pwd);
 
        if (!NT_STATUS_IS_OK(status)) {
-               TALLOC_FREE(pwd);
                return status;
        }
 
+       result->nss_token = true;
+       result->guest = is_guest;
+
+       /* Now turn the server_info into a session_info with the full token etc */
+       status = create_local_token(mem_ctx, result, NULL, pwd->pw_name, session_info);
+       TALLOC_FREE(result);
        TALLOC_FREE(pwd);
+
        return status;
 }
 
@@ -1156,7 +1181,7 @@ NTSTATUS make_session_info_guest(TALLOC_CTX *mem_ctx,
 
 static struct auth_session_info *system_info = NULL;
 
-NTSTATUS init_system_info(void)
+NTSTATUS init_system_session_info(void)
 {
        if (system_info != NULL)
                return NT_STATUS_OK;
@@ -1196,7 +1221,9 @@ static NTSTATUS check_account(TALLOC_CTX *mem_ctx, const char *domain,
        if (!lower_username) {
                return NT_STATUS_NO_MEMORY;
        }
-       strlower_m( lower_username );
+       if (!strlower_m( lower_username )) {
+               return NT_STATUS_INVALID_PARAMETER;
+       }
 
        orig_dom_user = talloc_asprintf(mem_ctx,
                                "%s%c%s",
@@ -1273,7 +1300,8 @@ struct passwd *smb_getpwnam( TALLOC_CTX *mem_ctx, const char *domuser,
                        /* 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() ) ) {
+                       if ( lp_winbind_use_default_domain() &&
+                            !strchr_m( pw->pw_name, *lp_winbind_separator() ) ) {
                                char *domain;
 
                                /* split the domain and username into 2 strings */
@@ -1349,11 +1377,11 @@ NTSTATUS make_server_info_info3(TALLOC_CTX *mem_ctx,
        char *found_username = NULL;
        const char *nt_domain;
        const char *nt_username;
+       struct dom_sid user_sid;
+       struct dom_sid group_sid;
        bool username_was_mapped;
        struct passwd *pwd;
        struct auth_serversupplied_info *result;
-       struct dom_sid *group_sid;
-       struct netr_SamInfo3 *i3;
 
        /* 
           Here is where we should check the list of
@@ -1361,6 +1389,15 @@ NTSTATUS make_server_info_info3(TALLOC_CTX *mem_ctx,
           matches.
        */
 
+       if (!sid_compose(&user_sid, info3->base.domain_sid, info3->base.rid)) {
+               return NT_STATUS_INVALID_PARAMETER;
+       }
+
+       if (!sid_compose(&group_sid, info3->base.domain_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
@@ -1405,43 +1442,17 @@ NTSTATUS make_server_info_info3(TALLOC_CTX *mem_ctx,
        result->unix_name = talloc_strdup(result, found_username);
 
        /* copy in the info3 */
-       result->info3 = i3 = copy_netr_SamInfo3(result, info3);
+       result->info3 = copy_netr_SamInfo3(result, info3);
        if (result->info3 == NULL) {
                TALLOC_FREE(result);
                return NT_STATUS_NO_MEMORY;
        }
 
        /* Fill in the unix info we found on the way */
+
        result->utok.uid = pwd->pw_uid;
        result->utok.gid = pwd->pw_gid;
 
-       /* We can't just trust that the primary group sid sent us is something
-        * we can really use. Obtain the usable sid, and store the original
-        * one as an additional group if it had to be replaced */
-       nt_status = get_primary_group_sid(mem_ctx, found_username,
-                                         &pwd, &group_sid);
-       if (!NT_STATUS_IS_OK(nt_status)) {
-               TALLOC_FREE(result);
-               return nt_status;
-       }
-
-       /* store and check if it is the same we got originally */
-       sid_peek_rid(group_sid, &i3->base.primary_gid);
-       if (i3->base.primary_gid != info3->base.primary_gid) {
-               uint32_t n = i3->base.groups.count;
-               /* not the same, store the original as an additional group */
-               i3->base.groups.rids =
-                       talloc_realloc(i3, i3->base.groups.rids,
-                                       struct samr_RidWithAttribute, n + 1);
-               if (i3->base.groups.rids == NULL) {
-                       TALLOC_FREE(result);
-                       return NT_STATUS_NO_MEMORY;
-               }
-               i3->base.groups.rids[n].rid = info3->base.primary_gid;
-               i3->base.groups.rids[n].attributes = SE_GROUP_ENABLED;
-               i3->base.groups.count = n + 1;
-       }
-
        /* ensure we are never given NULL session keys */
 
        if (memcmp(info3->base.key.key, zeros, sizeof(zeros)) == 0) {