Beispiel #1
0
static void manage_squid_basic_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 *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='******';
	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");
	}
}
Beispiel #2
0
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;
}
Beispiel #3
0
static void manage_gensec_get_pw_request(enum stdio_helper_mode stdio_helper_mode, 
					 struct loadparm_context *lp_ctx,
					 char *buf, int length, void **private1,
					 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(buf + 3);
	} else {
		in = data_blob(NULL, 0);
	}

	if (strncmp(buf, "PW ", 3) == 0) {

		*password = talloc_strndup(*private1 /* 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);
}
Beispiel #4
0
/**
 * @brief Send a message through the 0mq socket.
 *
 * This function is blocking.
 *
 * @returns The number of bytes sent.
 *
 * @param buf The data to send.
 * @param len The length of buf.
 */
int mux_0mq_send_msg(void *buf, size_t len)
{
    zmsg_t *msg = zmsg_new();

    mux_printf("Now attempting to send message!");
    zmsg_addstr(msg, display->uuid);
    zmsg_addmem(msg, buf, len);

    if (zmsg_size(msg) != 2) {
        mux_printf_error("Something went wrong building zmsg");
        return -1;
    }

    zmsg_send(&msg, display->zmq.socket); // TODO: figure out how return code works for this

    return len;
}
Beispiel #5
0
/**
 * @brief Connects to the 0mq socket on path.
 *
 * Connects to the 0mq socket located on the file path passed in, then stores that socket in the global display struct
 * upon success.
 *
 * @returns Whether the connection succeeded.
 *
 * @param path The path to the 0mq socket in the filesystem.
 */
__PUBLIC bool mux_connect(const char *path)
{
    display->zmq.path = path;
    display->zmq.socket = zsock_new_dealer(display->zmq.path);
    zsys_handler_set(mux_handler);
    if (display->zmq.socket == NULL) {
        mux_printf_error("0mq socket creation failed");
        return false;
    }

    display->zmq.poller = zpoller_new(display->zmq.socket, NULL);
    if (display->zmq.poller == NULL) {
        mux_printf_error("Could not initialize socket poller");
        return false;
    }
    mux_printf("Bound to %s", path);

    return true;
}
Beispiel #6
0
/**
 * @brief Receives data through the given 0mq socket and sticks it into buf.
 *
 * This function is blocking.
 *
 * @returns Number of bytes read.
 *
 * @param buf Pointer to a void* buffer.
 */
int mux_0mq_recv_msg(void **buf)
{
    zmsg_t *msg = NULL;
    zframe_t *identity = NULL;
    zframe_t *data = NULL;
    int len = -1;

    mux_printf("Now blocking on recv");

    if ((msg = zmsg_recv(display->zmq.socket)) == NULL) {
        mux_printf_error("Could not receive message from socket!");
        return -1;
    }

    //zmsg_print(msg);
    identity = zmsg_pop(msg);
    //zframe_print(identity, "F: ");

    if (!zframe_streq(identity, display->uuid)) {
        char *wrong = zframe_strdup(identity);
        mux_printf_error("Incorrect UUID: %s", wrong);
        free(wrong);
        zframe_destroy(&identity);
        return -1;
    }

    data = zmsg_pop(msg);
    //zframe_print(data, "F: ");
    len = zframe_size(data);
    *buf = calloc(1, zframe_size(data) + 1);
    memcpy(*buf, zframe_data(data), zframe_size(data));

    zframe_destroy(&identity);
    zframe_destroy(&data);

    return len;
}
Beispiel #7
0
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];
				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(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);
	}
}
Beispiel #8
0
static void manage_gensec_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) 
{
	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 tevent_context *ev;
	struct imessaging_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 (*private1) {
		state = (struct gensec_ntlm_state *)*private1;
	} else {
		state = talloc_zero(NULL, struct gensec_ntlm_state);
		if (!state) {
			mux_printf(mux_id, "BH No Memory\n");
			exit(1);
		}
		*private1 = 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(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);
	}

	mem_ctx = talloc_named(NULL, 0, "manage_gensec_request internal mem_ctx");

	/* 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, 
							lpcfg_gensec_settings(NULL, lp_ctx));
			if (!NT_STATUS_IS_OK(nt_status)) {
				talloc_free(mem_ctx);
				exit(1);
			}

			break;
		case GSS_SPNEGO_SERVER:
		case SQUID_2_5_NTLMSSP:
		{
			const char *winbind_method[] = { "winbind", NULL };
			struct auth4_context *auth_context;

			msg = imessaging_client_init(state, lpcfg_imessaging_path(state, lp_ctx), ev);
			if (!msg) {
				talloc_free(mem_ctx);
				exit(1);
			}
			nt_status = auth_context_create_methods(mem_ctx, 
								winbind_method,
								ev, 
								msg, 
								lp_ctx,
								NULL,
								&auth_context);
	
			if (!NT_STATUS_IS_OK(nt_status)) {
				talloc_free(mem_ctx);
				exit(1);
			}
			
			if (!NT_STATUS_IS_OK(gensec_server_start(state, ev, 
								 lpcfg_gensec_settings(state, lp_ctx),
								 auth_context, &state->gensec_state))) {
				talloc_free(mem_ctx);
				exit(1);
			}
			break;
		}
		default:
			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 {
			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:
			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(state->gensec_state, mem_ctx, 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;
}