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https://github.com/samba-team/samba.git
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c8e9574f41
Signed-off-by: Volker Lendecke <vl@samba.org> Reviewed-by: Jeremy Allison <jra@samba.org>
1168 lines
31 KiB
C
1168 lines
31 KiB
C
/*
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Unix SMB/CIFS implementation.
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Winbind status program.
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Copyright (C) Tim Potter 2000-2003
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Copyright (C) Andrew Bartlett <abartlet@samba.org> 2003-2004
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Copyright (C) Francesco Chemolli <kinkie@kame.usr.dsi.unimi.it> 2000
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "includes.h"
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#include "system/filesys.h"
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#include "lib/cmdline/popt_common.h"
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#include <ldb.h>
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#include "auth/credentials/credentials.h"
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#include "auth/gensec/gensec.h"
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#include "auth/gensec/gensec_internal.h" /* TODO: remove this */
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#include "auth/auth.h"
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#include "librpc/gen_ndr/ndr_netlogon.h"
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#include "auth/auth_sam.h"
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#include "libcli/auth/libcli_auth.h"
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#include "libcli/security/security.h"
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#include "lib/events/events.h"
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#include "lib/messaging/messaging.h"
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#include "lib/messaging/irpc.h"
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#include "auth/ntlmssp/ntlmssp.h"
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#include "param/param.h"
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#define INITIAL_BUFFER_SIZE 300
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#define MAX_BUFFER_SIZE 63000
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enum stdio_helper_mode {
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SQUID_2_4_BASIC,
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SQUID_2_5_BASIC,
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SQUID_2_5_NTLMSSP,
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NTLMSSP_CLIENT_1,
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GSS_SPNEGO_CLIENT,
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GSS_SPNEGO_SERVER,
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NTLM_SERVER_1,
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NUM_HELPER_MODES
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};
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#define NTLM_AUTH_FLAG_USER_SESSION_KEY 0x0004
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#define NTLM_AUTH_FLAG_LMKEY 0x0008
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typedef void (*stdio_helper_function)(enum stdio_helper_mode stdio_helper_mode,
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struct loadparm_context *lp_ctx,
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char *buf, int length, void **private1,
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unsigned int mux_id, void **private2);
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static void manage_squid_basic_request (enum stdio_helper_mode stdio_helper_mode,
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struct loadparm_context *lp_ctx,
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char *buf, int length, void **private1,
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unsigned int mux_id, void **private2);
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static void manage_gensec_request (enum stdio_helper_mode stdio_helper_mode,
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struct loadparm_context *lp_ctx,
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char *buf, int length, void **private1,
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unsigned int mux_id, void **private2);
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static void manage_ntlm_server_1_request (enum stdio_helper_mode stdio_helper_mode,
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struct loadparm_context *lp_ctx,
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char *buf, int length, void **private1,
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unsigned int mux_id, void **private2);
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static void manage_squid_request(struct loadparm_context *lp_ctx,
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enum stdio_helper_mode helper_mode,
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stdio_helper_function fn, void **private2);
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static const struct {
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enum stdio_helper_mode mode;
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const char *name;
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stdio_helper_function fn;
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} stdio_helper_protocols[] = {
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{ SQUID_2_4_BASIC, "squid-2.4-basic", manage_squid_basic_request},
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{ SQUID_2_5_BASIC, "squid-2.5-basic", manage_squid_basic_request},
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{ SQUID_2_5_NTLMSSP, "squid-2.5-ntlmssp", manage_gensec_request},
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{ GSS_SPNEGO_CLIENT, "gss-spnego-client", manage_gensec_request},
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{ GSS_SPNEGO_SERVER, "gss-spnego", manage_gensec_request},
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{ NTLMSSP_CLIENT_1, "ntlmssp-client-1", manage_gensec_request},
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{ NTLM_SERVER_1, "ntlm-server-1", manage_ntlm_server_1_request},
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{ NUM_HELPER_MODES, NULL, NULL}
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};
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extern int winbindd_fd;
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static const char *opt_username;
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static const char *opt_domain;
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static const char *opt_workstation;
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static const char *opt_password;
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static int opt_multiplex;
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static int use_cached_creds;
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static void mux_printf(unsigned int mux_id, const char *format, ...) PRINTF_ATTRIBUTE(2, 3);
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static void mux_printf(unsigned int mux_id, const char *format, ...)
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{
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va_list ap;
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if (opt_multiplex) {
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x_fprintf(x_stdout, "%d ", mux_id);
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}
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va_start(ap, format);
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x_vfprintf(x_stdout, format, ap);
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va_end(ap);
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}
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/* Copy of parse_domain_user from winbindd_util.c. Parse a string of the
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form DOMAIN/user into a domain and a user */
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static bool parse_ntlm_auth_domain_user(const char *domuser, char **domain,
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char **user, char winbind_separator)
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{
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char *p = strchr(domuser, winbind_separator);
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if (!p) {
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return false;
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}
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*user = smb_xstrdup(p+1);
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*domain = smb_xstrdup(domuser);
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(*domain)[PTR_DIFF(p, domuser)] = 0;
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return true;
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}
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/* Authenticate a user with a plaintext password */
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static bool check_plaintext_auth(const char *user, const char *pass,
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bool stdout_diagnostics)
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{
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return (strcmp(pass, opt_password) == 0);
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}
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/* authenticate a user with an encrypted username/password */
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static NTSTATUS local_pw_check_specified(struct loadparm_context *lp_ctx,
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const char *username,
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const char *domain,
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const char *workstation,
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const DATA_BLOB *challenge,
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const DATA_BLOB *lm_response,
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const DATA_BLOB *nt_response,
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uint32_t flags,
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DATA_BLOB *lm_session_key,
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DATA_BLOB *user_session_key,
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char **error_string,
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char **unix_name)
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{
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NTSTATUS nt_status;
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struct samr_Password lm_pw, nt_pw;
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struct samr_Password *lm_pwd, *nt_pwd;
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TALLOC_CTX *mem_ctx = talloc_init("local_pw_check_specified");
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if (!mem_ctx) {
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nt_status = NT_STATUS_NO_MEMORY;
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} else {
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E_md4hash(opt_password, nt_pw.hash);
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if (E_deshash(opt_password, lm_pw.hash)) {
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lm_pwd = &lm_pw;
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} else {
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lm_pwd = NULL;
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}
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nt_pwd = &nt_pw;
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nt_status = ntlm_password_check(mem_ctx,
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lpcfg_lanman_auth(lp_ctx),
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lpcfg_ntlm_auth(lp_ctx),
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MSV1_0_ALLOW_SERVER_TRUST_ACCOUNT |
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MSV1_0_ALLOW_WORKSTATION_TRUST_ACCOUNT,
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challenge,
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lm_response,
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nt_response,
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username,
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username,
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domain,
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lm_pwd, nt_pwd, user_session_key, lm_session_key);
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if (NT_STATUS_IS_OK(nt_status)) {
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if (unix_name) {
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if (asprintf(unix_name, "%s%c%s", domain,
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*lpcfg_winbind_separator(lp_ctx),
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username) < 0) {
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nt_status = NT_STATUS_NO_MEMORY;
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}
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}
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} else {
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DEBUG(3, ("Login for user [%s]\\[%s]@[%s] failed due to [%s]\n",
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domain, username, workstation,
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nt_errstr(nt_status)));
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}
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talloc_free(mem_ctx);
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}
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if (error_string) {
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*error_string = strdup(nt_errstr(nt_status));
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}
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return nt_status;
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}
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static void manage_squid_basic_request(enum stdio_helper_mode stdio_helper_mode,
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struct loadparm_context *lp_ctx,
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char *buf, int length, void **private1,
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unsigned int mux_id, void **private2)
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{
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char *user, *pass;
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user=buf;
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pass = memchr(buf, ' ', length);
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if (!pass) {
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DEBUG(2, ("Password not found. Denying access\n"));
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mux_printf(mux_id, "ERR\n");
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return;
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}
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*pass='\0';
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pass++;
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if (stdio_helper_mode == SQUID_2_5_BASIC) {
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rfc1738_unescape(user);
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rfc1738_unescape(pass);
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}
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if (check_plaintext_auth(user, pass, false)) {
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mux_printf(mux_id, "OK\n");
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} else {
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mux_printf(mux_id, "ERR\n");
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}
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}
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/* This is a bit hairy, but the basic idea is to do a password callback
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to the calling application. The callback comes from within gensec */
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static void manage_gensec_get_pw_request(enum stdio_helper_mode stdio_helper_mode,
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struct loadparm_context *lp_ctx,
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char *buf, int length, void **private1,
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unsigned int mux_id, void **password)
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{
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DATA_BLOB in;
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if (strlen(buf) < 2) {
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DEBUG(1, ("query [%s] invalid", buf));
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mux_printf(mux_id, "BH Query invalid\n");
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return;
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}
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if (strlen(buf) > 3) {
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in = base64_decode_data_blob(buf + 3);
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} else {
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in = data_blob(NULL, 0);
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}
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if (strncmp(buf, "PW ", 3) == 0) {
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*password = talloc_strndup(*private1 /* hopefully the right gensec context, useful to use for talloc */,
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(const char *)in.data, in.length);
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if (*password == NULL) {
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DEBUG(1, ("Out of memory\n"));
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mux_printf(mux_id, "BH Out of memory\n");
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data_blob_free(&in);
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return;
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}
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mux_printf(mux_id, "OK\n");
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data_blob_free(&in);
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return;
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}
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DEBUG(1, ("Asked for (and expected) a password\n"));
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mux_printf(mux_id, "BH Expected a password\n");
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data_blob_free(&in);
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}
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/**
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* Callback for password credentials. This is not async, and when
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* GENSEC and the credentials code is made async, it will look rather
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* different.
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*/
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static const char *get_password(struct cli_credentials *credentials)
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{
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char *password = NULL;
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void *cb = cli_credentials_callback_data_void(credentials);
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/* Ask for a password */
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mux_printf((unsigned int)(uintptr_t)cb, "PW\n");
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cli_credentials_set_callback_data(credentials, NULL);
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manage_squid_request(cmdline_lp_ctx, NUM_HELPER_MODES /* bogus */, manage_gensec_get_pw_request, (void **)&password);
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return password;
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}
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/**
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Check if a string is part of a list.
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**/
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static bool in_list(const char *s, const char *list, bool casesensitive)
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{
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char *tok;
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size_t tok_len = 1024;
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const char *p=list;
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if (!list)
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return false;
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tok = (char *)malloc(tok_len);
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if (!tok) {
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return false;
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}
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while (next_token(&p, tok, LIST_SEP, tok_len)) {
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if ((casesensitive?strcmp:strcasecmp_m)(tok,s) == 0) {
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free(tok);
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return true;
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}
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}
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free(tok);
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return false;
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}
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static void gensec_want_feature_list(struct gensec_security *state, char* feature_list)
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{
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if (in_list("NTLMSSP_FEATURE_SESSION_KEY", feature_list, true)) {
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DEBUG(10, ("want GENSEC_FEATURE_SESSION_KEY\n"));
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gensec_want_feature(state, GENSEC_FEATURE_SESSION_KEY);
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}
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if (in_list("NTLMSSP_FEATURE_SIGN", feature_list, true)) {
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DEBUG(10, ("want GENSEC_FEATURE_SIGN\n"));
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gensec_want_feature(state, GENSEC_FEATURE_SIGN);
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}
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if (in_list("NTLMSSP_FEATURE_SEAL", feature_list, true)) {
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DEBUG(10, ("want GENSEC_FEATURE_SEAL\n"));
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gensec_want_feature(state, GENSEC_FEATURE_SEAL);
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}
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}
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static void manage_gensec_request(enum stdio_helper_mode stdio_helper_mode,
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struct loadparm_context *lp_ctx,
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char *buf, int length, void **private1,
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unsigned int mux_id, void **private2)
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{
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DATA_BLOB in;
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DATA_BLOB out = data_blob(NULL, 0);
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char *out_base64 = NULL;
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const char *reply_arg = NULL;
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struct gensec_ntlm_state {
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struct gensec_security *gensec_state;
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const char *set_password;
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};
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struct gensec_ntlm_state *state;
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struct tevent_context *ev;
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struct imessaging_context *msg;
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NTSTATUS nt_status;
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bool first = false;
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const char *reply_code;
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struct cli_credentials *creds;
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static char *want_feature_list = NULL;
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static DATA_BLOB session_key;
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TALLOC_CTX *mem_ctx;
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if (*private1) {
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state = (struct gensec_ntlm_state *)*private1;
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} else {
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state = talloc_zero(NULL, struct gensec_ntlm_state);
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if (!state) {
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mux_printf(mux_id, "BH No Memory\n");
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exit(1);
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}
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*private1 = state;
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if (opt_password) {
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state->set_password = opt_password;
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}
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}
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if (strlen(buf) < 2) {
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DEBUG(1, ("query [%s] invalid", buf));
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mux_printf(mux_id, "BH Query invalid\n");
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return;
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}
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if (strlen(buf) > 3) {
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if(strncmp(buf, "SF ", 3) == 0) {
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DEBUG(10, ("Setting flags to negotiate\n"));
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talloc_free(want_feature_list);
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want_feature_list = talloc_strndup(state, buf+3, strlen(buf)-3);
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mux_printf(mux_id, "OK\n");
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return;
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}
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in = base64_decode_data_blob(buf + 3);
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} else {
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in = data_blob(NULL, 0);
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}
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if (strncmp(buf, "YR", 2) == 0) {
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if (state->gensec_state) {
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talloc_free(state->gensec_state);
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state->gensec_state = NULL;
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}
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} else if ( (strncmp(buf, "OK", 2) == 0)) {
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/* Just return BH, like ntlm_auth from Samba 3 does. */
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mux_printf(mux_id, "BH Command expected\n");
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data_blob_free(&in);
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return;
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} else if ( (strncmp(buf, "TT ", 3) != 0) &&
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(strncmp(buf, "KK ", 3) != 0) &&
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(strncmp(buf, "AF ", 3) != 0) &&
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(strncmp(buf, "NA ", 3) != 0) &&
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(strncmp(buf, "UG", 2) != 0) &&
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(strncmp(buf, "PW ", 3) != 0) &&
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(strncmp(buf, "GK", 2) != 0) &&
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(strncmp(buf, "GF", 2) != 0)) {
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DEBUG(1, ("SPNEGO request [%s] invalid\n", buf));
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mux_printf(mux_id, "BH SPNEGO request invalid\n");
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data_blob_free(&in);
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return;
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}
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ev = s4_event_context_init(state);
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if (!ev) {
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exit(1);
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}
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mem_ctx = talloc_named(NULL, 0, "manage_gensec_request internal mem_ctx");
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|
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/* setup gensec */
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if (!(state->gensec_state)) {
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switch (stdio_helper_mode) {
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case GSS_SPNEGO_CLIENT:
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case NTLMSSP_CLIENT_1:
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/* setup the client side */
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nt_status = gensec_client_start(NULL, &state->gensec_state,
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lpcfg_gensec_settings(NULL, lp_ctx));
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if (!NT_STATUS_IS_OK(nt_status)) {
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talloc_free(mem_ctx);
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exit(1);
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}
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break;
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case GSS_SPNEGO_SERVER:
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case SQUID_2_5_NTLMSSP:
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{
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const char *winbind_method[] = { "winbind", NULL };
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struct auth4_context *auth_context;
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msg = imessaging_client_init(state, lp_ctx, ev);
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if (!msg) {
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talloc_free(mem_ctx);
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exit(1);
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}
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nt_status = auth_context_create_methods(mem_ctx,
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winbind_method,
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ev,
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msg,
|
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lp_ctx,
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NULL,
|
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&auth_context);
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|
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if (!NT_STATUS_IS_OK(nt_status)) {
|
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talloc_free(mem_ctx);
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exit(1);
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}
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if (!NT_STATUS_IS_OK(gensec_server_start(state,
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lpcfg_gensec_settings(state, lp_ctx),
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auth_context, &state->gensec_state))) {
|
|
talloc_free(mem_ctx);
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|
exit(1);
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}
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break;
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}
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|
default:
|
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talloc_free(mem_ctx);
|
|
abort();
|
|
}
|
|
|
|
creds = cli_credentials_init(state->gensec_state);
|
|
cli_credentials_set_conf(creds, lp_ctx);
|
|
if (opt_username) {
|
|
cli_credentials_set_username(creds, opt_username, CRED_SPECIFIED);
|
|
}
|
|
if (opt_domain) {
|
|
cli_credentials_set_domain(creds, opt_domain, CRED_SPECIFIED);
|
|
}
|
|
if (state->set_password) {
|
|
cli_credentials_set_password(creds, state->set_password, CRED_SPECIFIED);
|
|
} else {
|
|
void *cb = (void*)(uintptr_t)mux_id;
|
|
cli_credentials_set_callback_data(creds, cb);
|
|
cli_credentials_set_password_callback(creds, get_password);
|
|
}
|
|
if (opt_workstation) {
|
|
cli_credentials_set_workstation(creds, opt_workstation, CRED_SPECIFIED);
|
|
}
|
|
|
|
switch (stdio_helper_mode) {
|
|
case GSS_SPNEGO_SERVER:
|
|
case SQUID_2_5_NTLMSSP:
|
|
cli_credentials_set_machine_account(creds, lp_ctx);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
gensec_set_credentials(state->gensec_state, creds);
|
|
gensec_want_feature_list(state->gensec_state, want_feature_list);
|
|
|
|
switch (stdio_helper_mode) {
|
|
case GSS_SPNEGO_CLIENT:
|
|
case GSS_SPNEGO_SERVER:
|
|
nt_status = gensec_start_mech_by_oid(state->gensec_state, GENSEC_OID_SPNEGO);
|
|
if (!in.length) {
|
|
first = true;
|
|
}
|
|
break;
|
|
case NTLMSSP_CLIENT_1:
|
|
if (!in.length) {
|
|
first = true;
|
|
}
|
|
/* fall through */
|
|
case SQUID_2_5_NTLMSSP:
|
|
nt_status = gensec_start_mech_by_oid(state->gensec_state, GENSEC_OID_NTLMSSP);
|
|
break;
|
|
default:
|
|
talloc_free(mem_ctx);
|
|
abort();
|
|
}
|
|
|
|
if (!NT_STATUS_IS_OK(nt_status)) {
|
|
DEBUG(1, ("GENSEC mech failed to start: %s\n", nt_errstr(nt_status)));
|
|
mux_printf(mux_id, "BH GENSEC mech failed to start\n");
|
|
talloc_free(mem_ctx);
|
|
return;
|
|
}
|
|
|
|
}
|
|
|
|
/* update */
|
|
|
|
if (strncmp(buf, "PW ", 3) == 0) {
|
|
state->set_password = talloc_strndup(state,
|
|
(const char *)in.data,
|
|
in.length);
|
|
|
|
cli_credentials_set_password(gensec_get_credentials(state->gensec_state),
|
|
state->set_password,
|
|
CRED_SPECIFIED);
|
|
mux_printf(mux_id, "OK\n");
|
|
data_blob_free(&in);
|
|
talloc_free(mem_ctx);
|
|
return;
|
|
}
|
|
|
|
if (strncmp(buf, "UG", 2) == 0) {
|
|
int i;
|
|
char *grouplist = NULL;
|
|
struct auth_session_info *session_info;
|
|
|
|
nt_status = gensec_session_info(state->gensec_state, mem_ctx, &session_info);
|
|
if (!NT_STATUS_IS_OK(nt_status)) {
|
|
DEBUG(1, ("gensec_session_info failed: %s\n", nt_errstr(nt_status)));
|
|
mux_printf(mux_id, "BH %s\n", nt_errstr(nt_status));
|
|
data_blob_free(&in);
|
|
talloc_free(mem_ctx);
|
|
return;
|
|
}
|
|
|
|
/* get the string onto the context */
|
|
grouplist = talloc_strdup(mem_ctx, "");
|
|
|
|
for (i=0; i<session_info->security_token->num_sids; i++) {
|
|
struct security_token *token = session_info->security_token;
|
|
const char *sidstr = dom_sid_string(session_info,
|
|
&token->sids[i]);
|
|
grouplist = talloc_asprintf_append_buffer(grouplist, "%s,", sidstr);
|
|
}
|
|
|
|
mux_printf(mux_id, "GL %s\n", grouplist);
|
|
talloc_free(session_info);
|
|
data_blob_free(&in);
|
|
talloc_free(mem_ctx);
|
|
return;
|
|
}
|
|
|
|
if (strncmp(buf, "GK", 2) == 0) {
|
|
char *base64_key;
|
|
DEBUG(10, ("Requested session key\n"));
|
|
nt_status = gensec_session_key(state->gensec_state, mem_ctx, &session_key);
|
|
if(!NT_STATUS_IS_OK(nt_status)) {
|
|
DEBUG(1, ("gensec_session_key failed: %s\n", nt_errstr(nt_status)));
|
|
mux_printf(mux_id, "BH No session key\n");
|
|
talloc_free(mem_ctx);
|
|
return;
|
|
} else {
|
|
base64_key = base64_encode_data_blob(state, session_key);
|
|
mux_printf(mux_id, "GK %s\n", base64_key);
|
|
talloc_free(base64_key);
|
|
}
|
|
talloc_free(mem_ctx);
|
|
return;
|
|
}
|
|
|
|
if (strncmp(buf, "GF", 2) == 0) {
|
|
struct ntlmssp_state *ntlmssp_state;
|
|
uint32_t neg_flags;
|
|
|
|
ntlmssp_state = talloc_get_type(state->gensec_state->private_data,
|
|
struct ntlmssp_state);
|
|
neg_flags = ntlmssp_state->neg_flags;
|
|
|
|
DEBUG(10, ("Requested negotiated feature flags\n"));
|
|
mux_printf(mux_id, "GF 0x%08x\n", neg_flags);
|
|
return;
|
|
}
|
|
|
|
nt_status = gensec_update_ev(state->gensec_state, mem_ctx, ev, in, &out);
|
|
|
|
/* don't leak 'bad password'/'no such user' info to the network client */
|
|
nt_status = nt_status_squash(nt_status);
|
|
|
|
if (out.length) {
|
|
out_base64 = base64_encode_data_blob(mem_ctx, out);
|
|
} else {
|
|
out_base64 = NULL;
|
|
}
|
|
|
|
if (NT_STATUS_EQUAL(nt_status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
|
|
reply_arg = "*";
|
|
if (first) {
|
|
reply_code = "YR";
|
|
} else if (state->gensec_state->gensec_role == GENSEC_CLIENT) {
|
|
reply_code = "KK";
|
|
} else if (state->gensec_state->gensec_role == GENSEC_SERVER) {
|
|
reply_code = "TT";
|
|
} else {
|
|
abort();
|
|
}
|
|
|
|
|
|
} else if (NT_STATUS_EQUAL(nt_status, NT_STATUS_ACCESS_DENIED)) {
|
|
reply_code = "BH NT_STATUS_ACCESS_DENIED";
|
|
reply_arg = nt_errstr(nt_status);
|
|
DEBUG(1, ("GENSEC login failed: %s\n", nt_errstr(nt_status)));
|
|
} else if (NT_STATUS_EQUAL(nt_status, NT_STATUS_UNSUCCESSFUL)) {
|
|
reply_code = "BH NT_STATUS_UNSUCCESSFUL";
|
|
reply_arg = nt_errstr(nt_status);
|
|
DEBUG(1, ("GENSEC login failed: %s\n", nt_errstr(nt_status)));
|
|
} else if (!NT_STATUS_IS_OK(nt_status)) {
|
|
reply_code = "NA";
|
|
reply_arg = nt_errstr(nt_status);
|
|
DEBUG(1, ("GENSEC login failed: %s\n", nt_errstr(nt_status)));
|
|
} else if /* OK */ (state->gensec_state->gensec_role == GENSEC_SERVER) {
|
|
struct auth_session_info *session_info;
|
|
|
|
nt_status = gensec_session_info(state->gensec_state, mem_ctx, &session_info);
|
|
if (!NT_STATUS_IS_OK(nt_status)) {
|
|
reply_code = "BH Failed to retrive session info";
|
|
reply_arg = nt_errstr(nt_status);
|
|
DEBUG(1, ("GENSEC failed to retrieve the session info: %s\n", nt_errstr(nt_status)));
|
|
} else {
|
|
|
|
reply_code = "AF";
|
|
reply_arg = talloc_asprintf(state->gensec_state,
|
|
"%s%s%s", session_info->info->domain_name,
|
|
lpcfg_winbind_separator(lp_ctx), session_info->info->account_name);
|
|
talloc_free(session_info);
|
|
}
|
|
} else if (state->gensec_state->gensec_role == GENSEC_CLIENT) {
|
|
reply_code = "AF";
|
|
reply_arg = out_base64;
|
|
} else {
|
|
abort();
|
|
}
|
|
|
|
switch (stdio_helper_mode) {
|
|
case GSS_SPNEGO_SERVER:
|
|
mux_printf(mux_id, "%s %s %s\n", reply_code,
|
|
out_base64 ? out_base64 : "*",
|
|
reply_arg ? reply_arg : "*");
|
|
break;
|
|
default:
|
|
if (out_base64) {
|
|
mux_printf(mux_id, "%s %s\n", reply_code, out_base64);
|
|
} else if (reply_arg) {
|
|
mux_printf(mux_id, "%s %s\n", reply_code, reply_arg);
|
|
} else {
|
|
mux_printf(mux_id, "%s\n", reply_code);
|
|
}
|
|
}
|
|
|
|
talloc_free(mem_ctx);
|
|
return;
|
|
}
|
|
|
|
static void manage_ntlm_server_1_request(enum stdio_helper_mode stdio_helper_mode,
|
|
struct loadparm_context *lp_ctx,
|
|
char *buf, int length, void **private1,
|
|
unsigned int mux_id, void **private2)
|
|
{
|
|
char *request, *parameter;
|
|
static DATA_BLOB challenge;
|
|
static DATA_BLOB lm_response;
|
|
static DATA_BLOB nt_response;
|
|
static char *full_username;
|
|
static char *username;
|
|
static char *domain;
|
|
static char *plaintext_password;
|
|
static bool ntlm_server_1_user_session_key;
|
|
static bool ntlm_server_1_lm_session_key;
|
|
|
|
if (strequal(buf, ".")) {
|
|
if (!full_username && !username) {
|
|
mux_printf(mux_id, "Error: No username supplied!\n");
|
|
} else if (plaintext_password) {
|
|
/* handle this request as plaintext */
|
|
if (!full_username) {
|
|
if (asprintf(&full_username, "%s%c%s", domain, *lpcfg_winbind_separator(lp_ctx), username) < 0) {
|
|
mux_printf(mux_id, "Error: Out of memory in asprintf!\n.\n");
|
|
return;
|
|
}
|
|
}
|
|
if (check_plaintext_auth(full_username, plaintext_password, false)) {
|
|
mux_printf(mux_id, "Authenticated: Yes\n");
|
|
} else {
|
|
mux_printf(mux_id, "Authenticated: No\n");
|
|
}
|
|
} else if (!lm_response.data && !nt_response.data) {
|
|
mux_printf(mux_id, "Error: No password supplied!\n");
|
|
} else if (!challenge.data) {
|
|
mux_printf(mux_id, "Error: No lanman-challenge supplied!\n");
|
|
} else {
|
|
char *error_string = NULL;
|
|
DATA_BLOB lm_key;
|
|
DATA_BLOB user_session_key;
|
|
uint32_t flags = 0;
|
|
|
|
if (full_username && !username) {
|
|
SAFE_FREE(username);
|
|
SAFE_FREE(domain);
|
|
if (!parse_ntlm_auth_domain_user(full_username, &username,
|
|
&domain,
|
|
*lpcfg_winbind_separator(lp_ctx))) {
|
|
/* username might be 'tainted', don't print into our new-line deleimianted stream */
|
|
mux_printf(mux_id, "Error: Could not parse into domain and username\n");
|
|
}
|
|
}
|
|
|
|
if (!domain) {
|
|
domain = smb_xstrdup(lpcfg_workgroup(lp_ctx));
|
|
}
|
|
|
|
if (ntlm_server_1_lm_session_key)
|
|
flags |= NTLM_AUTH_FLAG_LMKEY;
|
|
|
|
if (ntlm_server_1_user_session_key)
|
|
flags |= NTLM_AUTH_FLAG_USER_SESSION_KEY;
|
|
|
|
if (!NT_STATUS_IS_OK(
|
|
local_pw_check_specified(lp_ctx,
|
|
username,
|
|
domain,
|
|
lpcfg_netbios_name(lp_ctx),
|
|
&challenge,
|
|
&lm_response,
|
|
&nt_response,
|
|
flags,
|
|
&lm_key,
|
|
&user_session_key,
|
|
&error_string,
|
|
NULL))) {
|
|
|
|
mux_printf(mux_id, "Authenticated: No\n");
|
|
mux_printf(mux_id, "Authentication-Error: %s\n.\n", error_string);
|
|
SAFE_FREE(error_string);
|
|
} else {
|
|
static char zeros[16];
|
|
|
|
mux_printf(mux_id, "Authenticated: Yes\n");
|
|
|
|
if (ntlm_server_1_lm_session_key
|
|
&& lm_key.length
|
|
&& (memcmp(zeros, lm_key.data,
|
|
lm_key.length) != 0)) {
|
|
char hex_lm_key[lm_key.length*2+1];
|
|
hex_encode_buf(hex_lm_key, lm_key.data,
|
|
lm_key.length);
|
|
mux_printf(mux_id, "LANMAN-Session-Key: %s\n", hex_lm_key);
|
|
}
|
|
|
|
if (ntlm_server_1_user_session_key
|
|
&& user_session_key.length
|
|
&& (memcmp(zeros, user_session_key.data,
|
|
user_session_key.length) != 0)) {
|
|
char hex_user_session_key[
|
|
user_session_key.length*2+1];
|
|
hex_encode_buf(hex_user_session_key,
|
|
user_session_key.data,
|
|
user_session_key.length);
|
|
mux_printf(mux_id, "User-Session-Key: %s\n", hex_user_session_key);
|
|
}
|
|
}
|
|
}
|
|
/* clear out the state */
|
|
challenge = data_blob(NULL, 0);
|
|
nt_response = data_blob(NULL, 0);
|
|
lm_response = data_blob(NULL, 0);
|
|
SAFE_FREE(full_username);
|
|
SAFE_FREE(username);
|
|
SAFE_FREE(domain);
|
|
SAFE_FREE(plaintext_password);
|
|
ntlm_server_1_user_session_key = false;
|
|
ntlm_server_1_lm_session_key = false;
|
|
mux_printf(mux_id, ".\n");
|
|
|
|
return;
|
|
}
|
|
|
|
request = buf;
|
|
|
|
/* Indicates a base64 encoded structure */
|
|
parameter = strstr(request, ":: ");
|
|
if (!parameter) {
|
|
parameter = strstr(request, ": ");
|
|
|
|
if (!parameter) {
|
|
DEBUG(0, ("Parameter not found!\n"));
|
|
mux_printf(mux_id, "Error: Parameter not found!\n.\n");
|
|
return;
|
|
}
|
|
|
|
parameter[0] ='\0';
|
|
parameter++;
|
|
parameter[0] ='\0';
|
|
parameter++;
|
|
|
|
} else {
|
|
parameter[0] ='\0';
|
|
parameter++;
|
|
parameter[0] ='\0';
|
|
parameter++;
|
|
parameter[0] ='\0';
|
|
parameter++;
|
|
|
|
base64_decode_inplace(parameter);
|
|
}
|
|
|
|
if (strequal(request, "LANMAN-Challenge")) {
|
|
challenge = strhex_to_data_blob(NULL, parameter);
|
|
if (challenge.length != 8) {
|
|
mux_printf(mux_id, "Error: hex decode of %s failed! (got %d bytes, expected 8)\n.\n",
|
|
parameter,
|
|
(int)challenge.length);
|
|
challenge = data_blob(NULL, 0);
|
|
}
|
|
} else if (strequal(request, "NT-Response")) {
|
|
nt_response = strhex_to_data_blob(NULL, parameter);
|
|
if (nt_response.length < 24) {
|
|
mux_printf(mux_id, "Error: hex decode of %s failed! (only got %d bytes, needed at least 24)\n.\n",
|
|
parameter,
|
|
(int)nt_response.length);
|
|
nt_response = data_blob(NULL, 0);
|
|
}
|
|
} else if (strequal(request, "LANMAN-Response")) {
|
|
lm_response = strhex_to_data_blob(NULL, parameter);
|
|
if (lm_response.length != 24) {
|
|
mux_printf(mux_id, "Error: hex decode of %s failed! (got %d bytes, expected 24)\n.\n",
|
|
parameter,
|
|
(int)lm_response.length);
|
|
lm_response = data_blob(NULL, 0);
|
|
}
|
|
} else if (strequal(request, "Password")) {
|
|
plaintext_password = smb_xstrdup(parameter);
|
|
} else if (strequal(request, "NT-Domain")) {
|
|
domain = smb_xstrdup(parameter);
|
|
} else if (strequal(request, "Username")) {
|
|
username = smb_xstrdup(parameter);
|
|
} else if (strequal(request, "Full-Username")) {
|
|
full_username = smb_xstrdup(parameter);
|
|
} else if (strequal(request, "Request-User-Session-Key")) {
|
|
ntlm_server_1_user_session_key = strequal(parameter, "Yes");
|
|
} else if (strequal(request, "Request-LanMan-Session-Key")) {
|
|
ntlm_server_1_lm_session_key = strequal(parameter, "Yes");
|
|
} else {
|
|
mux_printf(mux_id, "Error: Unknown request %s\n.\n", request);
|
|
}
|
|
}
|
|
|
|
static void manage_squid_request(struct loadparm_context *lp_ctx, enum stdio_helper_mode helper_mode,
|
|
stdio_helper_function fn, void **private2)
|
|
{
|
|
char *buf;
|
|
char tmp[INITIAL_BUFFER_SIZE+1];
|
|
unsigned int mux_id = 0;
|
|
int length, buf_size = 0;
|
|
char *c;
|
|
struct mux_private {
|
|
unsigned int max_mux;
|
|
void **private_pointers;
|
|
};
|
|
|
|
static struct mux_private *mux_private;
|
|
static void *normal_private;
|
|
void **private1;
|
|
|
|
buf = talloc_strdup(NULL, "");
|
|
|
|
if (buf == NULL) {
|
|
DEBUG(0, ("Failed to allocate memory for reading the input "
|
|
"buffer.\n"));
|
|
x_fprintf(x_stdout, "ERR\n");
|
|
return;
|
|
}
|
|
|
|
do {
|
|
/* this is not a typo - x_fgets doesn't work too well under
|
|
* squid */
|
|
if (fgets(tmp, INITIAL_BUFFER_SIZE, stdin) == NULL) {
|
|
if (ferror(stdin)) {
|
|
DEBUG(1, ("fgets() failed! dying..... errno=%d "
|
|
"(%s)\n", ferror(stdin),
|
|
strerror(ferror(stdin))));
|
|
|
|
exit(1); /* BIIG buffer */
|
|
}
|
|
exit(0);
|
|
}
|
|
|
|
buf = talloc_strdup_append_buffer(buf, tmp);
|
|
buf_size += INITIAL_BUFFER_SIZE;
|
|
|
|
if (buf_size > MAX_BUFFER_SIZE) {
|
|
DEBUG(0, ("Invalid Request (too large)\n"));
|
|
x_fprintf(x_stdout, "ERR\n");
|
|
talloc_free(buf);
|
|
return;
|
|
}
|
|
|
|
c = strchr(buf, '\n');
|
|
} while (c == NULL);
|
|
|
|
*c = '\0';
|
|
length = c-buf;
|
|
|
|
DEBUG(10, ("Got '%s' from squid (length: %d).\n",buf,length));
|
|
|
|
if (buf[0] == '\0') {
|
|
DEBUG(0, ("Invalid Request (empty)\n"));
|
|
x_fprintf(x_stdout, "ERR\n");
|
|
talloc_free(buf);
|
|
return;
|
|
}
|
|
|
|
if (opt_multiplex) {
|
|
if (sscanf(buf, "%u ", &mux_id) != 1) {
|
|
DEBUG(0, ("Invalid Request - no multiplex id\n"));
|
|
x_fprintf(x_stdout, "ERR\n");
|
|
talloc_free(buf);
|
|
return;
|
|
}
|
|
if (!mux_private) {
|
|
mux_private = talloc(NULL, struct mux_private);
|
|
mux_private->max_mux = 0;
|
|
mux_private->private_pointers = NULL;
|
|
}
|
|
|
|
c=strchr(buf,' ');
|
|
if (!c) {
|
|
DEBUG(0, ("Invalid Request - no data after multiplex id\n"));
|
|
x_fprintf(x_stdout, "ERR\n");
|
|
talloc_free(buf);
|
|
return;
|
|
}
|
|
c++;
|
|
if (mux_id >= mux_private->max_mux) {
|
|
unsigned int prev_max = mux_private->max_mux;
|
|
mux_private->max_mux = mux_id + 1;
|
|
mux_private->private_pointers
|
|
= talloc_realloc(mux_private,
|
|
mux_private->private_pointers,
|
|
void *, mux_private->max_mux);
|
|
memset(&mux_private->private_pointers[prev_max], '\0',
|
|
(sizeof(*mux_private->private_pointers) * (mux_private->max_mux - prev_max)));
|
|
};
|
|
|
|
private1 = &mux_private->private_pointers[mux_id];
|
|
} else {
|
|
c = buf;
|
|
private1 = &normal_private;
|
|
}
|
|
|
|
fn(helper_mode, lp_ctx, c, length, private1, mux_id, private2);
|
|
talloc_free(buf);
|
|
}
|
|
|
|
static void squid_stream(struct loadparm_context *lp_ctx,
|
|
enum stdio_helper_mode stdio_mode,
|
|
stdio_helper_function fn) {
|
|
/* initialize FDescs */
|
|
x_setbuf(x_stdout, NULL);
|
|
x_setbuf(x_stderr, NULL);
|
|
while(1) {
|
|
manage_squid_request(lp_ctx, stdio_mode, fn, NULL);
|
|
}
|
|
}
|
|
|
|
|
|
/* Main program */
|
|
|
|
enum {
|
|
OPT_USERNAME = 1000,
|
|
OPT_DOMAIN,
|
|
OPT_WORKSTATION,
|
|
OPT_CHALLENGE,
|
|
OPT_RESPONSE,
|
|
OPT_LM,
|
|
OPT_NT,
|
|
OPT_PASSWORD,
|
|
OPT_LM_KEY,
|
|
OPT_USER_SESSION_KEY,
|
|
OPT_DIAGNOSTICS,
|
|
OPT_REQUIRE_MEMBERSHIP,
|
|
OPT_MULTIPLEX,
|
|
OPT_USE_CACHED_CREDS,
|
|
};
|
|
|
|
int main(int argc, const char **argv)
|
|
{
|
|
static const char *helper_protocol;
|
|
int opt;
|
|
|
|
poptContext pc;
|
|
|
|
/* NOTE: DO NOT change this interface without considering the implications!
|
|
This is an external interface, which other programs will use to interact
|
|
with this helper.
|
|
*/
|
|
|
|
/* We do not use single-letter command abbreviations, because they harm future
|
|
interface stability. */
|
|
|
|
struct poptOption long_options[] = {
|
|
POPT_AUTOHELP
|
|
{ "helper-protocol", 0, POPT_ARG_STRING, &helper_protocol, OPT_DOMAIN, "operate as a stdio-based helper", "helper protocol to use"},
|
|
{ "domain", 0, POPT_ARG_STRING, &opt_domain, OPT_DOMAIN, "domain name"},
|
|
{ "workstation", 0, POPT_ARG_STRING, &opt_workstation, OPT_WORKSTATION, "workstation"},
|
|
{ "username", 0, POPT_ARG_STRING, &opt_username, OPT_PASSWORD, "Username"},
|
|
{ "password", 0, POPT_ARG_STRING, &opt_password, OPT_PASSWORD, "User's plaintext password"},
|
|
{ "multiplex", 0, POPT_ARG_NONE, &opt_multiplex, OPT_MULTIPLEX, "Multiplex Mode"},
|
|
{ "use-cached-creds", 0, POPT_ARG_NONE, &use_cached_creds, OPT_USE_CACHED_CREDS, "silently ignored for compatibility reasons"},
|
|
POPT_COMMON_SAMBA
|
|
POPT_COMMON_VERSION
|
|
{ NULL }
|
|
};
|
|
|
|
/* Samba client initialisation */
|
|
|
|
setup_logging(NULL, DEBUG_STDERR);
|
|
|
|
/* Parse options */
|
|
|
|
pc = poptGetContext("ntlm_auth", argc, argv, long_options, 0);
|
|
|
|
/* Parse command line options */
|
|
|
|
if (argc == 1) {
|
|
poptPrintHelp(pc, stderr, 0);
|
|
return 1;
|
|
}
|
|
|
|
pc = poptGetContext(NULL, argc, (const char **)argv, long_options,
|
|
POPT_CONTEXT_KEEP_FIRST);
|
|
|
|
while((opt = poptGetNextOpt(pc)) != -1) {
|
|
if (opt < -1) {
|
|
break;
|
|
}
|
|
}
|
|
if (opt < -1) {
|
|
fprintf(stderr, "%s: %s\n",
|
|
poptBadOption(pc, POPT_BADOPTION_NOALIAS),
|
|
poptStrerror(opt));
|
|
return 1;
|
|
}
|
|
|
|
gensec_init();
|
|
|
|
if (opt_domain == NULL) {
|
|
opt_domain = lpcfg_workgroup(cmdline_lp_ctx);
|
|
}
|
|
|
|
if (helper_protocol) {
|
|
int i;
|
|
for (i=0; i<NUM_HELPER_MODES; i++) {
|
|
if (strcmp(helper_protocol, stdio_helper_protocols[i].name) == 0) {
|
|
squid_stream(cmdline_lp_ctx, stdio_helper_protocols[i].mode, stdio_helper_protocols[i].fn);
|
|
exit(0);
|
|
}
|
|
}
|
|
x_fprintf(x_stderr, "unknown helper protocol [%s]\n\nValid helper protools:\n\n", helper_protocol);
|
|
|
|
for (i=0; i<NUM_HELPER_MODES; i++) {
|
|
x_fprintf(x_stderr, "%s\n", stdio_helper_protocols[i].name);
|
|
}
|
|
|
|
exit(1);
|
|
}
|
|
|
|
if (!opt_username) {
|
|
x_fprintf(x_stderr, "username must be specified!\n\n");
|
|
poptPrintHelp(pc, stderr, 0);
|
|
exit(1);
|
|
}
|
|
|
|
if (opt_workstation == NULL) {
|
|
opt_workstation = lpcfg_netbios_name(cmdline_lp_ctx);
|
|
}
|
|
|
|
if (!opt_password) {
|
|
char pwd[256] = {0};
|
|
int rc;
|
|
|
|
rc = samba_getpass("Password: ", pwd, sizeof(pwd), false, false);
|
|
if (rc == 0) {
|
|
opt_password = smb_xstrdup(pwd);
|
|
}
|
|
}
|
|
|
|
{
|
|
char *user;
|
|
|
|
if (asprintf(&user, "%s%c%s", opt_domain,
|
|
*lpcfg_winbind_separator(cmdline_lp_ctx),
|
|
opt_username) < 0) {
|
|
return 1;
|
|
}
|
|
if (!check_plaintext_auth(user, opt_password, true)) {
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
/* Exit code */
|
|
|
|
poptFreeContext(pc);
|
|
return 0;
|
|
}
|