1 files changed, 1159 insertions, 0 deletions
diff --git a/source4/utils/ntlm_auth.c b/source4/utils/ntlm_auth.c
new file mode 100644
index 0000000000..6a6302837e
--- /dev/null
+++ b/source4/utils/ntlm_auth.c
@@ -0,0 +1,1159 @@
+/* 
+   Unix SMB/CIFS implementation.
+
+   Winbind status program.
+
+   Copyright (C) Tim Potter      2000-2003
+   Copyright (C) Andrew Bartlett <abartlet@samba.org> 2003-2004
+   Copyright (C) Francesco Chemolli <kinkie@kame.usr.dsi.unimi.it> 2000 
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+   
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+   
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "includes.h"
+#include "system/filesys.h"
+#include "lib/cmdline/popt_common.h"
+#include "lib/ldb/include/ldb.h"
+#include "auth/credentials/credentials.h"
+#include "auth/gensec/gensec.h"
+#include "auth/auth.h"
+#include "librpc/gen_ndr/ndr_netlogon.h"
+#include "auth/auth_sam.h"
+#include "auth/ntlm/ntlm_check.h"
+#include "pstring.h"
+#include "libcli/auth/libcli_auth.h"
+#include "libcli/security/security.h"
+#include "lib/events/events.h"
+#include "lib/messaging/messaging.h"
+#include "lib/messaging/irpc.h"
+#include "auth/ntlmssp/ntlmssp.h"
+#include "param/param.h"
+
+#define INITIAL_BUFFER_SIZE 300
+#define MAX_BUFFER_SIZE 63000
+
+enum stdio_helper_mode {
+	SQUID_2_4_BASIC,
+	SQUID_2_5_BASIC,
+	SQUID_2_5_NTLMSSP,
+	NTLMSSP_CLIENT_1,
+	GSS_SPNEGO_CLIENT,
+	GSS_SPNEGO_SERVER,
+	NTLM_SERVER_1,
+	NUM_HELPER_MODES
+};
+
+#define NTLM_AUTH_FLAG_USER_SESSION_KEY     0x0004
+#define NTLM_AUTH_FLAG_LMKEY                0x0008
+
+
+typedef void (*stdio_helper_function)(enum stdio_helper_mode stdio_helper_mode, 
+				      struct loadparm_context *lp_ctx,
+				      char *buf, int length, void **private,
+				      unsigned int mux_id, void **private2);
+
+static void manage_squid_basic_request (enum stdio_helper_mode stdio_helper_mode, 
+					struct loadparm_context *lp_ctx,
+					char *buf, int length, void **private,
+					unsigned int mux_id, void **private2);
+
+static void manage_gensec_request (enum stdio_helper_mode stdio_helper_mode, 
+				   struct loadparm_context *lp_ctx,
+				   char *buf, int length, void **private,
+				   unsigned int mux_id, void **private2);
+
+static void manage_ntlm_server_1_request (enum stdio_helper_mode stdio_helper_mode, 
+					  struct loadparm_context *lp_ctx,
+					  char *buf, int length, void **private,
+					  unsigned int mux_id, void **private2);
+
+static void manage_squid_request(struct loadparm_context *lp_ctx,
+				 enum stdio_helper_mode helper_mode, 
+				 stdio_helper_function fn, void **private2);
+
+static const struct {
+	enum stdio_helper_mode mode;
+	const char *name;
+	stdio_helper_function fn;
+} stdio_helper_protocols[] = {
+	{ SQUID_2_4_BASIC, "squid-2.4-basic", manage_squid_basic_request},
+	{ SQUID_2_5_BASIC, "squid-2.5-basic", manage_squid_basic_request},
+	{ SQUID_2_5_NTLMSSP, "squid-2.5-ntlmssp", manage_gensec_request},
+	{ GSS_SPNEGO_CLIENT, "gss-spnego-client", manage_gensec_request},
+	{ GSS_SPNEGO_SERVER, "gss-spnego", manage_gensec_request},
+	{ NTLMSSP_CLIENT_1, "ntlmssp-client-1", manage_gensec_request},
+	{ NTLM_SERVER_1, "ntlm-server-1", manage_ntlm_server_1_request},
+	{ NUM_HELPER_MODES, NULL, NULL}
+};
+
+extern int winbindd_fd;
+
+static const char *opt_username;
+static const char *opt_domain;
+static const char *opt_workstation;
+static const char *opt_password;
+static int opt_multiplex;
+static int use_cached_creds;
+
+
+static void mux_printf(unsigned int mux_id, const char *format, ...) PRINTF_ATTRIBUTE(2, 3);
+
+static void mux_printf(unsigned int mux_id, const char *format, ...)
+{
+	va_list ap;
+
+	if (opt_multiplex) {
+		x_fprintf(x_stdout, "%d ", mux_id);
+	}
+
+	va_start(ap, format);
+	x_vfprintf(x_stdout, format, ap);
+	va_end(ap);
+}
+
+
+
+/* Copy of parse_domain_user from winbindd_util.c.  Parse a string of the
+   form DOMAIN/user into a domain and a user */
+
+static bool parse_ntlm_auth_domain_user(const char *domuser, fstring domain, 
+					fstring user, char winbind_separator)
+{
+
+	char *p = strchr(domuser, winbind_separator);
+
+	if (!p) {
+		return false;
+	}
+        
+	fstrcpy(user, p+1);
+	fstrcpy(domain, domuser);
+	domain[PTR_DIFF(p, domuser)] = 0;
+
+	return true;
+}
+
+/**
+ * Decode a base64 string into a DATA_BLOB - simple and slow algorithm
+ **/
+static DATA_BLOB base64_decode_data_blob(TALLOC_CTX *mem_ctx, const char *s)
+{
+	DATA_BLOB ret = data_blob_talloc(mem_ctx, s, strlen(s)+1);
+	ret.length = ldb_base64_decode((char *)ret.data);
+	return ret;
+}
+
+/**
+ * Encode a base64 string into a talloc()ed string caller to free.
+ **/
+static char *base64_encode_data_blob(TALLOC_CTX *mem_ctx, DATA_BLOB data)
+{
+	return ldb_base64_encode(mem_ctx, (const char *)data.data, data.length);
+}
+
+/**
+ * Decode a base64 string in-place - wrapper for the above
+ **/
+static void base64_decode_inplace(char *s)
+{
+	ldb_base64_decode(s);
+}
+
+
+
+/* Authenticate a user with a plaintext password */
+
+static bool check_plaintext_auth(const char *user, const char *pass, 
+				 bool stdout_diagnostics)
+{
+        return (strcmp(pass, opt_password) == 0);
+}
+
+/* authenticate a user with an encrypted username/password */
+
+static NTSTATUS local_pw_check_specified(struct loadparm_context *lp_ctx,
+					 const char *username, 
+					 const char *domain, 
+					 const char *workstation,
+					 const DATA_BLOB *challenge, 
+					 const DATA_BLOB *lm_response, 
+					 const DATA_BLOB *nt_response, 
+					 uint32_t flags, 
+					 DATA_BLOB *lm_session_key, 
+					 DATA_BLOB *user_session_key, 
+					 char **error_string, 
+					 char **unix_name) 
+{
+	NTSTATUS nt_status;
+	struct samr_Password lm_pw, nt_pw;
+	struct samr_Password *lm_pwd, *nt_pwd;
+	TALLOC_CTX *mem_ctx = talloc_init("local_pw_check_specified");
+	if (!mem_ctx) {
+		nt_status = NT_STATUS_NO_MEMORY;
+	} else {
+		
+		E_md4hash(opt_password, nt_pw.hash);
+		if (E_deshash(opt_password, lm_pw.hash)) {
+			lm_pwd = &lm_pw;
+		} else {
+			lm_pwd = NULL;
+		}
+		nt_pwd = &nt_pw;
+		
+		
+		nt_status = ntlm_password_check(mem_ctx, 
+						lp_ctx,
+						MSV1_0_ALLOW_SERVER_TRUST_ACCOUNT |
+						MSV1_0_ALLOW_WORKSTATION_TRUST_ACCOUNT,
+						challenge,
+						lm_response,
+						nt_response,
+						username,
+						username,
+						domain,
+						lm_pwd, nt_pwd, user_session_key, lm_session_key);
+		
+		if (NT_STATUS_IS_OK(nt_status)) {
+			if (unix_name) {
+				asprintf(unix_name, 
+					 "%s%c%s", domain,
+					 *lp_winbind_separator(lp_ctx), 
+					 username);
+			}
+		} else {
+			DEBUG(3, ("Login for user [%s]\\[%s]@[%s] failed due to [%s]\n", 
+				  domain, username, workstation, 
+				  nt_errstr(nt_status)));
+		}
+		talloc_free(mem_ctx);
+	}
+	if (error_string) {
+		*error_string = strdup(nt_errstr(nt_status));
+	}
+	return nt_status;
+	
+	
+}
+
+static void manage_squid_basic_request(enum stdio_helper_mode stdio_helper_mode, 
+				       struct loadparm_context *lp_ctx,
+				       char *buf, int length, void **private,
+				       unsigned int mux_id, void **private2) 
+{
+	char *user, *pass;	
+	user=buf;
+	
+	pass = memchr(buf, ' ', length);
+	if (!pass) {
+		DEBUG(2, ("Password not found. Denying access\n"));
+		mux_printf(mux_id, "ERR\n");
+		return;
+	}
+	*pass='\0';
+	pass++;
+	
+	if (stdio_helper_mode == SQUID_2_5_BASIC) {
+		rfc1738_unescape(user);
+		rfc1738_unescape(pass);
+	}
+	
+	if (check_plaintext_auth(user, pass, false)) {
+		mux_printf(mux_id, "OK\n");
+	} else {
+		mux_printf(mux_id, "ERR\n");
+	}
+}
+
+/* This is a bit hairy, but the basic idea is to do a password callback
+   to the calling application.  The callback comes from within gensec */
+
+static void manage_gensec_get_pw_request(enum stdio_helper_mode stdio_helper_mode, 
+					 struct loadparm_context *lp_ctx,
+					 char *buf, int length, void **private,
+					 unsigned int mux_id, void **password)  
+{
+	DATA_BLOB in;
+	if (strlen(buf) < 2) {
+		DEBUG(1, ("query [%s] invalid", buf));
+		mux_printf(mux_id, "BH Query invalid\n");
+		return;
+	}
+
+	if (strlen(buf) > 3) {
+		in = base64_decode_data_blob(NULL, buf + 3);
+	} else {
+		in = data_blob(NULL, 0);
+	}
+
+	if (strncmp(buf, "PW ", 3) == 0) {
+
+		*password = talloc_strndup(*private /* hopefully the right gensec context, useful to use for talloc */,
+					   (const char *)in.data, in.length);
+		
+		if (*password == NULL) {
+			DEBUG(1, ("Out of memory\n"));
+			mux_printf(mux_id, "BH Out of memory\n");
+			data_blob_free(&in);
+			return;
+		}
+
+		mux_printf(mux_id, "OK\n");
+		data_blob_free(&in);
+		return;
+	}
+	DEBUG(1, ("Asked for (and expected) a password\n"));
+	mux_printf(mux_id, "BH Expected a password\n");
+	data_blob_free(&in);
+}
+
+/** 
+ * Callback for password credentials.  This is not async, and when
+ * GENSEC and the credentials code is made async, it will look rather
+ * different.
+ */
+
+static const char *get_password(struct cli_credentials *credentials) 
+{
+	char *password = NULL;
+	
+	/* Ask for a password */
+	mux_printf((unsigned int)(uintptr_t)credentials->priv_data, "PW\n");
+	credentials->priv_data = NULL;
+
+	manage_squid_request(cmdline_lp_ctx, NUM_HELPER_MODES /* bogus */, manage_gensec_get_pw_request, (void **)&password);
+	return password;
+}
+
+/**
+ Check if a string is part of a list.
+**/
+static bool in_list(const char *s, const char *list, bool casesensitive)
+{
+	char *tok;
+	size_t tok_len = 1024;
+	const char *p=list;
+
+	if (!list)
+		return false;
+
+	tok = (char *)malloc(tok_len);
+	if (!tok) {
+		return false;
+	}
+
+	while (next_token(&p, tok, LIST_SEP, tok_len)) {
+		if ((casesensitive?strcmp:strcasecmp_m)(tok,s) == 0) {
+			free(tok);
+			return true;
+		}
+	}
+	free(tok);
+	return false;
+}
+
+static void gensec_want_feature_list(struct gensec_security *state, char* feature_list)
+{
+	if (in_list("NTLMSSP_FEATURE_SESSION_KEY", feature_list, true)) {
+		DEBUG(10, ("want GENSEC_FEATURE_SESSION_KEY\n"));
+		gensec_want_feature(state, GENSEC_FEATURE_SESSION_KEY);
+	}
+	if (in_list("NTLMSSP_FEATURE_SIGN", feature_list, true)) {
+		DEBUG(10, ("want GENSEC_FEATURE_SIGN\n"));
+		gensec_want_feature(state, GENSEC_FEATURE_SIGN);
+	}
+	if (in_list("NTLMSSP_FEATURE_SEAL", feature_list, true)) {
+		DEBUG(10, ("want GENSEC_FEATURE_SEAL\n"));
+		gensec_want_feature(state, GENSEC_FEATURE_SEAL);
+	}
+}
+
+static void manage_gensec_request(enum stdio_helper_mode stdio_helper_mode, 
+				  struct loadparm_context *lp_ctx,
+				  char *buf, int length, void **private,
+				  unsigned int mux_id, void **private2) 
+{
+	DATA_BLOB in;
+	DATA_BLOB out = data_blob(NULL, 0);
+	char *out_base64 = NULL;
+	const char *reply_arg = NULL;
+	struct gensec_ntlm_state {
+		struct gensec_security *gensec_state;
+		const char *set_password;
+	};
+	struct gensec_ntlm_state *state;
+	struct event_context *ev;
+	struct messaging_context *msg;
+
+	NTSTATUS nt_status;
+	bool first = false;
+	const char *reply_code;
+	struct cli_credentials *creds;
+
+	static char *want_feature_list = NULL;
+	static DATA_BLOB session_key;
+
+	TALLOC_CTX *mem_ctx;
+
+	if (*private) {
+		state = (struct gensec_ntlm_state *)*private;
+	} else {
+		state = talloc_zero(NULL, struct gensec_ntlm_state);
+		if (!state) {
+			mux_printf(mux_id, "BH No Memory\n");
+			exit(1);
+		}
+		*private = state;
+		if (opt_password) {
+			state->set_password = opt_password;
+		}
+	}
+	
+	if (strlen(buf) < 2) {
+		DEBUG(1, ("query [%s] invalid", buf));
+		mux_printf(mux_id, "BH Query invalid\n");
+		return;
+	}
+
+	if (strlen(buf) > 3) {
+		if(strncmp(buf, "SF ", 3) == 0) {
+			DEBUG(10, ("Setting flags to negotiate\n"));
+			talloc_free(want_feature_list);
+			want_feature_list = talloc_strndup(state, buf+3, strlen(buf)-3);
+			mux_printf(mux_id, "OK\n");
+			return;
+		}
+		in = base64_decode_data_blob(NULL, buf + 3);
+	} else {
+		in = data_blob(NULL, 0);
+	}
+
+	if (strncmp(buf, "YR", 2) == 0) {
+		if (state->gensec_state) {
+			talloc_free(state->gensec_state);
+			state->gensec_state = NULL;
+		}
+	} else if ( (strncmp(buf, "OK", 2) == 0)) {
+		/* Just return BH, like ntlm_auth from Samba 3 does. */
+		mux_printf(mux_id, "BH Command expected\n");
+		data_blob_free(&in);
+		return;
+	} else if ( (strncmp(buf, "TT ", 3) != 0) &&
+		    (strncmp(buf, "KK ", 3) != 0) &&
+		    (strncmp(buf, "AF ", 3) != 0) &&
+		    (strncmp(buf, "NA ", 3) != 0) && 
+		    (strncmp(buf, "UG", 2) != 0) && 
+		    (strncmp(buf, "PW ", 3) != 0) &&
+		    (strncmp(buf, "GK", 2) != 0) &&
+		    (strncmp(buf, "GF", 2) != 0)) {
+		DEBUG(1, ("SPNEGO request [%s] invalid\n", buf));
+		mux_printf(mux_id, "BH SPNEGO request invalid\n");
+		data_blob_free(&in);
+		return;
+	}
+
+	ev = s4_event_context_init(state);
+	if (!ev) {
+		exit(1);
+	}
+	/* setup gensec */
+	if (!(state->gensec_state)) {
+		switch (stdio_helper_mode) {
+		case GSS_SPNEGO_CLIENT:
+		case NTLMSSP_CLIENT_1:
+			/* setup the client side */
+
+			nt_status = gensec_client_start(NULL, &state->gensec_state, ev, lp_ctx);
+			if (!NT_STATUS_IS_OK(nt_status)) {
+				exit(1);
+			}
+
+			break;
+		case GSS_SPNEGO_SERVER:
+		case SQUID_2_5_NTLMSSP:
+			msg = messaging_client_init(state, lp_messaging_path(state, lp_ctx), 
+						    lp_iconv_convenience(lp_ctx), ev);
+			if (!msg) {
+				exit(1);
+			}
+			if (!NT_STATUS_IS_OK(gensec_server_start(state, ev, lp_ctx, msg, &state->gensec_state))) {
+				exit(1);
+			}
+			break;
+		default:
+			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 {
+			cli_credentials_set_password_callback(creds, get_password);
+			creds->priv_data = (void*)(uintptr_t)mux_id;
+		}
+		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:
+			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");
+			return;
+		}
+
+	}
+
+	/* update */
+	mem_ctx = talloc_named(NULL, 0, "manage_gensec_request internal mem_ctx");
+	
+	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, &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, &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 gensec_ntlmssp_state *gensec_ntlmssp_state;
+		uint32_t neg_flags;
+
+		gensec_ntlmssp_state = talloc_get_type(state->gensec_state->private_data, 
+				struct gensec_ntlmssp_state);
+		neg_flags = gensec_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(state->gensec_state, mem_ctx, in, &out);
+	
+	/* don't leak 'bad password'/'no such user' info to the network client */
+	nt_status = auth_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, &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 retreive 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->server_info->domain_name, 
+						    lp_winbind_separator(lp_ctx), session_info->server_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 **private,
+					 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, *lp_winbind_separator(lp_ctx), username) == -1) {
+					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) {
+				fstring fstr_user;
+				fstring fstr_domain;
+				
+				if (!parse_ntlm_auth_domain_user(full_username, fstr_user, fstr_domain, 
+								 *lp_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");
+				}
+				SAFE_FREE(username);
+				SAFE_FREE(domain);
+				username = smb_xstrdup(fstr_user);
+				domain = smb_xstrdup(fstr_domain);
+			}
+
+			if (!domain) {
+				domain = smb_xstrdup(lp_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, 
+							      lp_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];
+				char *hex_lm_key;
+				char *hex_user_session_key;
+
+				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)) {
+					hex_encode(lm_key.data,
+						   lm_key.length,
+						   &hex_lm_key);
+					mux_printf(mux_id, "LANMAN-Session-Key: %s\n", hex_lm_key);
+					SAFE_FREE(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)) {
+					hex_encode(user_session_key.data, 
+						   user_session_key.length, 
+						   &hex_user_session_key);
+					mux_printf(mux_id, "User-Session-Key: %s\n", hex_user_session_key);
+					SAFE_FREE(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(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(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(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 **private;
+
+	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))); 
+		};
+
+		private = &mux_private->private_pointers[mux_id];
+	} else {
+		c = buf;
+		private = &normal_private;
+	}
+
+	fn(helper_mode, lp_ctx, c, length, private, 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(cmdline_lp_ctx);
+
+	if (opt_domain == NULL) {
+		opt_domain = lp_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 = lp_netbios_name(cmdline_lp_ctx);
+	}
+
+	if (!opt_password) {
+		opt_password = getpass("password: ");
+	}
+
+	{
+		char *user;
+
+		asprintf(&user, "%s%c%s", opt_domain, *lp_winbind_separator(cmdline_lp_ctx), opt_username);
+		if (!check_plaintext_auth(user, opt_password, true)) {
+			return 1;
+		}
+	}
+
+	/* Exit code */
+
+	poptFreeContext(pc);
+	return 0;
+}