Ensure that only parse_prs.c access internal members of the prs_struct.
[samba.git] / source3 / nsswitch / winbindd_pam.c
index e608f826c917f2f9b64aaa59e9b9382d9885c799..e24afbabd601a0600c7ba3c036d556d0b08e25ec 100644 (file)
 */
 
 #include "winbindd.h"
-
 #undef DBGC_CLASS
 #define DBGC_CLASS DBGC_WINBIND
 
+
+static NTSTATUS append_info3_as_ndr(TALLOC_CTX *mem_ctx, 
+                                   struct winbindd_cli_state *state, 
+                                   NET_USER_INFO_3 *info3) 
+{
+       prs_struct ps;
+       uint32 size;
+       if (!prs_init(&ps, 256 /* Random, non-zero number */, mem_ctx, MARSHALL)) {
+               return NT_STATUS_NO_MEMORY;
+       }
+       if (!net_io_user_info3("", info3, &ps, 1, 3)) {
+               prs_mem_free(&ps);
+               return NT_STATUS_UNSUCCESSFUL;
+       }
+
+       size = prs_data_size(&ps);
+       state->response.extra_data = malloc(size);
+       if (!state->response.extra_data) {
+               prs_mem_free(&ps);
+               return NT_STATUS_NO_MEMORY;
+       }
+       prs_copy_all_data_out(state->response.extra_data, &ps);
+       state->response.length += size;
+       prs_mem_free(&ps);
+       return NT_STATUS_OK;
+}
+
 /* Return a password structure from a username.  */
 
 enum winbindd_result winbindd_pam_auth(struct winbindd_cli_state *state) 
 {
        NTSTATUS result;
        fstring name_domain, name_user;
-       int passlen;
        unsigned char trust_passwd[16];
        time_t last_change_time;
         uint32 smb_uid_low;
@@ -44,12 +69,16 @@ enum winbindd_result winbindd_pam_auth(struct winbindd_cli_state *state)
        DATA_BLOB lm_resp;
        DATA_BLOB nt_resp;
 
-       extern pstring global_myname;
+       /* Ensure null termination */
+       state->request.data.auth.user[sizeof(state->request.data.auth.user)-1]='\0';
+
+       /* Ensure null termination */
+       state->request.data.auth.pass[sizeof(state->request.data.auth.pass)-1]='\0';
 
        DEBUG(3, ("[%5d]: pam auth %s\n", state->pid,
                  state->request.data.auth.user));
 
-       if (!(mem_ctx = talloc_init_named("winbind pam auth for %s", state->request.data.auth.user))) {
+       if (!(mem_ctx = talloc_init("winbind pam auth for %s", state->request.data.auth.user))) {
                DEBUG(0, ("winbindd_pam_auth: could not talloc_init()!\n"));
                result = NT_STATUS_NO_MEMORY;
                goto done;
@@ -64,16 +93,14 @@ enum winbindd_result winbindd_pam_auth(struct winbindd_cli_state *state)
                goto done;
        }
 
-       passlen = strlen(state->request.data.auth.pass);
-               
        {
                unsigned char local_lm_response[24];
                unsigned char local_nt_response[24];
                
                generate_random_buffer(chal, 8, False);
-               SMBencrypt( (const uchar *)state->request.data.auth.pass, chal, local_lm_response);
+               SMBencrypt(state->request.data.auth.pass, chal, local_lm_response);
                
-               SMBNTencrypt((const uchar *)state->request.data.auth.pass, chal, local_nt_response);
+               SMBNTencrypt(state->request.data.auth.pass, chal, local_nt_response);
 
                lm_resp = data_blob_talloc(mem_ctx, local_lm_response, sizeof(local_lm_response));
                nt_resp = data_blob_talloc(mem_ctx, local_nt_response, sizeof(local_nt_response));
@@ -107,7 +134,7 @@ enum winbindd_result winbindd_pam_auth(struct winbindd_cli_state *state)
 
        result = cli_netlogon_sam_network_logon(cli, mem_ctx,
                                                name_user, name_domain, 
-                                               global_myname, chal, 
+                                               global_myname(), chal, 
                                                lm_resp, nt_resp, 
                                                &info3);
         
@@ -116,10 +143,10 @@ done:
 
        state->response.data.auth.nt_status = NT_STATUS_V(result);
        fstrcpy(state->response.data.auth.nt_status_string, nt_errstr(result));
-       fstrcpy(state->response.data.auth.error_string, nt_errstr(result));
+       fstrcpy(state->response.data.auth.error_string, get_friendly_nt_error_msg(result));
        state->response.data.auth.pam_error = nt_status_to_pam(result);
 
-       DEBUG(NT_STATUS_IS_OK(result) ? 5 : 2, ("Plain-text authenticaion for user %s returned %s (PAM: %d)\n", 
+       DEBUG(NT_STATUS_IS_OK(result) ? 5 : 2, ("Plain-text authentication for user %s returned %s (PAM: %d)\n", 
              state->request.data.auth.user, 
              state->response.data.auth.nt_status_string,
              state->response.data.auth.pam_error));          
@@ -140,34 +167,69 @@ enum winbindd_result winbindd_pam_auth_crap(struct winbindd_cli_state *state)
         NET_USER_INFO_3 info3;
         struct cli_state *cli = NULL;
        TALLOC_CTX *mem_ctx = NULL;
+       char *user = NULL;
        const char *domain = NULL;
+       const char *contact_domain;
+       const char *workstation;
 
        DATA_BLOB lm_resp, nt_resp;
 
-       extern pstring global_myname;
+       /* Ensure null termination */
+       state->request.data.auth_crap.user[sizeof(state->request.data.auth_crap.user)-1]='\0';
 
-       DEBUG(3, ("[%5d]: pam auth crap domain: %s user: %s\n", state->pid,
-                 state->request.data.auth_crap.domain, state->request.data.auth_crap.user));
+       /* Ensure null termination */
+       state->request.data.auth_crap.domain[sizeof(state->request.data.auth_crap.domain)-1]='\0';
 
-       if (!(mem_ctx = talloc_init_named("winbind pam auth crap for %s", state->request.data.auth.user))) {
+       if (!(mem_ctx = talloc_init("winbind pam auth crap for (utf8) %s", state->request.data.auth_crap.user))) {
                DEBUG(0, ("winbindd_pam_auth_crap: could not talloc_init()!\n"));
                result = NT_STATUS_NO_MEMORY;
                goto done;
        }
 
+        if (pull_utf8_talloc(mem_ctx, &user, state->request.data.auth_crap.user) == (size_t)-1) {
+               DEBUG(0, ("winbindd_pam_auth_crap: pull_utf8_talloc failed!\n"));
+       }
+
        if (*state->request.data.auth_crap.domain) {
-               domain = talloc_strdup(mem_ctx, state->request.data.auth_crap.domain);
+               char *dom = NULL;
+               if (pull_utf8_talloc(mem_ctx, &dom, state->request.data.auth_crap.domain) == (size_t)-1) {
+                       DEBUG(0, ("winbindd_pam_auth_crap: pull_utf8_talloc failed!\n"));
+               }
+               domain = dom;
        } else if (lp_winbind_use_default_domain()) {
-               domain = talloc_strdup(mem_ctx, lp_workgroup());
+               domain = lp_workgroup();
        } else {
-               DEBUG(5,("no domain specified with username (%s) - failing auth\n", state->request.data.auth.user));
+               DEBUG(5,("no domain specified with username (%s) - failing auth\n", 
+                        user));
                result = NT_STATUS_INVALID_PARAMETER;
                goto done;
        }
 
-       if (!domain) {
-               DEBUG(0,("winbindd_pam_auth_crap: talloc_strdup failed!\n"));
-               result = NT_STATUS_NO_MEMORY;
+       DEBUG(3, ("[%5d]: pam auth crap domain: %s user: %s\n", state->pid,
+                 domain, user));
+
+       if (lp_allow_trusted_domains() && (state->request.data.auth_crap.flags & WINBIND_PAM_CONTACT_TRUSTDOM)) {
+               contact_domain = domain;
+       } else {
+               contact_domain = lp_workgroup();
+       }
+
+       if (*state->request.data.auth_crap.workstation) {
+               char *wrk = NULL;
+               if (pull_utf8_talloc(mem_ctx, &wrk, state->request.data.auth_crap.workstation) == (size_t)-1) {
+                       DEBUG(0, ("winbindd_pam_auth_crap: pull_utf8_talloc failed!\n"));
+               }
+               workstation = wrk;
+       } else {
+               workstation = global_myname();
+       }
+
+       if (state->request.data.auth_crap.lm_resp_len > sizeof(state->request.data.auth_crap.lm_resp)
+               || state->request.data.auth_crap.nt_resp_len > sizeof(state->request.data.auth_crap.nt_resp)) {
+               DEBUG(0, ("winbindd_pam_auth_crap: invalid password length %u/%u\n", 
+                         state->request.data.auth_crap.lm_resp_len, 
+                         state->request.data.auth_crap.nt_resp_len));
+               result = NT_STATUS_INVALID_PARAMETER;
                goto done;
        }
 
@@ -175,13 +237,15 @@ enum winbindd_result winbindd_pam_auth_crap(struct winbindd_cli_state *state)
        nt_resp = data_blob_talloc(mem_ctx, state->request.data.auth_crap.nt_resp, state->request.data.auth_crap.nt_resp_len);
        
        /*
-        * Get the machine account password for our primary domain
+        * Get the machine account password for the domain to contact.
+        * This is either our own domain for a workstation, or possibly
+        * any domain for a PDC with trusted domains.
         */
 
-       if (!secrets_fetch_trust_account_password(
-                lp_workgroup(), trust_passwd, &last_change_time)) {
+       if (!secrets_fetch_trust_account_password (
+                contact_domain, trust_passwd, &last_change_time)) {
                DEBUG(0, ("winbindd_pam_auth: could not fetch trust account "
-                          "password for domain %s\n", lp_workgroup()));
+                          "password for domain %s\n", contact_domain));
                result = NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
                goto done;
        }
@@ -189,7 +253,7 @@ enum winbindd_result winbindd_pam_auth_crap(struct winbindd_cli_state *state)
        ZERO_STRUCT(info3);
 
        /* Don't shut this down - it belongs to the connection cache code */
-        result = cm_get_netlogon_cli(lp_workgroup(), trust_passwd, &cli);
+        result = cm_get_netlogon_cli(contact_domain, trust_passwd, &cli);
 
         if (!NT_STATUS_IS_OK(result)) {
                 DEBUG(3, ("could not open handle to NETLOGON pipe (error: %s)\n", nt_errstr(result)));
@@ -197,27 +261,45 @@ enum winbindd_result winbindd_pam_auth_crap(struct winbindd_cli_state *state)
         }
 
        result = cli_netlogon_sam_network_logon(cli, mem_ctx,
-                                               state->request.data.auth_crap.user, domain,
-                                               global_myname, state->request.data.auth_crap.chal, 
+                                               user, domain,
+                                               workstation, state->request.data.auth_crap.chal, 
                                                lm_resp, nt_resp, 
                                                &info3);
         
        if (NT_STATUS_IS_OK(result)) {
                uni_group_cache_store_netlogon(mem_ctx, &info3);
+               if (state->request.data.auth_crap.flags & WINBIND_PAM_INFO3_NDR) {
+                       result = append_info3_as_ndr(mem_ctx, state, &info3);
+               }
+
+#if 0
+               /* we don't currently do this stuff right */
+               /* Doing an assert in a daemon is going to be a pretty bad 
+                   idea. - tpot */
+               if (state->request.data.auth_crap.flags & WINBIND_PAM_NTKEY) {
+                       SMB_ASSERT(sizeof(state->response.data.auth.nt_session_key) == sizeof(info3.user_sess_key)); 
+                       memcpy(state->response.data.auth.nt_session_key, info3.user_sess_key, sizeof(state->response.data.auth.nt_session_key) /* 16 */);
+               }
+               if (state->request.data.auth_crap.flags & WINBIND_PAM_LMKEY) {
+                       SMB_ASSERT(sizeof(state->response.data.auth.nt_session_key) <= sizeof(info3.user_sess_key)); 
+                       memcpy(state->response.data.auth.first_8_lm_hash, info3.padding, sizeof(state->response.data.auth.nt_session_key) /* 16 */);
+               }
+#endif
        }
 
 done:
 
        state->response.data.auth.nt_status = NT_STATUS_V(result);
-       fstrcpy(state->response.data.auth.nt_status_string, nt_errstr(result));
-       fstrcpy(state->response.data.auth.error_string, nt_errstr(result));
+       push_utf8_fstring(state->response.data.auth.nt_status_string, nt_errstr(result));
+       push_utf8_fstring(state->response.data.auth.error_string, nt_errstr(result));
        state->response.data.auth.pam_error = nt_status_to_pam(result);
 
-       DEBUG(NT_STATUS_IS_OK(result) ? 5 : 2, ("NTLM CRAP authenticaion for user [%s]\\[%s] returned %s (PAM: %d)\n", 
-             state->request.data.auth_crap.domain, 
-             state->request.data.auth_crap.user, 
-             state->response.data.auth.nt_status_string,
-             state->response.data.auth.pam_error));          
+       DEBUG(NT_STATUS_IS_OK(result) ? 5 : 2, 
+             ("NTLM CRAP authentication for user [%s]\\[%s] returned %s (PAM: %d)\n", 
+              domain,
+              user,
+              state->response.data.auth.nt_status_string,
+              state->response.data.auth.pam_error));         
 
        if (mem_ctx) 
                talloc_destroy(mem_ctx);
@@ -275,5 +357,12 @@ done:
        fstrcpy(state->response.data.auth.error_string, nt_errstr(result));
        state->response.data.auth.pam_error = nt_status_to_pam(result);
 
+       DEBUG(NT_STATUS_IS_OK(result) ? 5 : 2, 
+             ("Password change for user [%s]\\[%s] returned %s (PAM: %d)\n", 
+              domain,
+              user,
+              state->response.data.auth.nt_status_string,
+              state->response.data.auth.pam_error));         
+
        return NT_STATUS_IS_OK(result) ? WINBINDD_OK : WINBINDD_ERROR;
 }