[thirdparty/squid.git] / helpers / negotiate_auth / mswin_sspi / negotiate_auth.c


/*
 * mswin_negotiate_auth: helper for Negotiate Authentication for Squid Cache
 *
 * (C)2005 Guido Serassio - Acme Consulting S.r.l.
 *
 * Authors:
 *  Guido Serassio <guido.serassio@acmeconsulting.it>
 *  Acme Consulting S.r.l., Italy <http://www.acmeconsulting.it>
 *
 * With contributions from others mentioned in the change history section
 * below.
 *
 * Based on previous work of Francesco Chemolli and Robert Collins.
 *
 * Dependencies: Windows 2000 and later.
 *
 * 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 2 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, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
 *
 * History:
 *
 * Version 1.0
 * 29-10-2005 Guido Serassio
 *              First release.
 *
 *
 */

#include "util.h"
#if HAVE_GETOPT_H
#include <getopt.h>
#endif
#include "negotiate.h"
#if HAVE_CTYPE_H
#include <ctype.h>
#endif

#define BUFFER_SIZE 10240

int debug_enabled = 0;
int Negotiate_packet_debug_enabled = 0;

static int have_serverblob;

/* makes a null-terminated string upper-case. Changes CONTENTS! */
void
uc(char *string)
{
    char *p = string, c;
    while ((c = *p)) {
	*p = xtoupper(c);
	p++;
    }
}

/* makes a null-terminated string lower-case. Changes CONTENTS! */
static void
lc(char *string)
{
    char *p = string, c;
    while ((c = *p)) {
	*p = xtolower(c);
	p++;
    }
}

void
helperfail(const char *reason)
{
#if FAIL_DEBUG
    fail_debug_enabled = 1;
#endif
    SEND2("BH %s", reason);
}

/*
 * options:
 * -d enable debugging.
 * -v enable verbose Negotiate packet debugging.
 */
char *my_program_name = NULL;

void
usage()
{
    fprintf(stderr,
	"Usage: %s [-d] [-v] [-h]\n"
	" -d  enable debugging.\n"
	" -v  enable verbose Negotiate packet debugging.\n"
	" -h  this message\n\n",
	my_program_name);
}


void
process_options(int argc, char *argv[])
{
    int opt, had_error = 0;

    opterr = 0;
    while (-1 != (opt = getopt(argc, argv, "hdv"))) {
	switch (opt) {
	case 'd':
	    debug_enabled = 1;
	    break;
	case 'v':
	    debug_enabled = 1;
	    Negotiate_packet_debug_enabled = 1;
	    break;
	case 'h':
	    usage();
	    exit(0);
	case '?':
	    opt = optopt;
	    /* fall thru to default */
	default:
	    fprintf(stderr, "unknown option: -%c. Exiting\n", opt);
	    usage();
	    had_error = 1;
	}
    }
    if (had_error)
	exit(1);
}

int
manage_request()
{
    char buf[BUFFER_SIZE];
    char helper_command[3];
    char *c, *decoded;
    int plen, status;
    int oversized = 0;
    char *ErrorMessage;
    static char cred[SSP_MAX_CRED_LEN + 1];
    BOOL Done = FALSE;

  try_again:
    if (fgets(buf, BUFFER_SIZE, stdin) == NULL)
	return 0;

    c = memchr(buf, '\n', BUFFER_SIZE);		/* safer against overrun than strchr */
    if (c) {
	if (oversized) {
	    helperfail("illegal request received");
	    fprintf(stderr, "Illegal request received: '%s'\n", buf);
	    return 1;
	}
	*c = '\0';
    } else {
	fprintf(stderr, "No newline in '%s'\n", buf);
	oversized = 1;
	goto try_again;
    }

    if ((strlen(buf) > 3) && Negotiate_packet_debug_enabled) {
	decoded = base64_decode(buf + 3);
	strncpy(helper_command, buf, 2);
	debug("Got '%s' from Squid with data:\n", helper_command);
	hex_dump(decoded, ((strlen(buf) - 3) * 3) / 4);
    } else
	debug("Got '%s' from Squid\n", buf);

    if (memcmp(buf, "YR ", 3) == 0) {	/* refresh-request */
	/* figure out what we got */
	decoded = base64_decode(buf + 3);
	/*  Note: we don't need to manage memory at this point, since
	 *  base64_decode returns a pointer to static storage.
	 */
	if (!decoded) {		/* decoding failure, return error */
	    SEND("NA * Packet format error, couldn't base64-decode");
	    return 1;
	}
	/* Obtain server blob against SSPI */
	plen = (strlen(buf) - 3) * 3 / 4;	/* we only need it here. Optimization */
	c = (char *) SSP_MakeNegotiateBlob(decoded, plen, &Done, &status, cred);

	if (status == SSP_OK) {
	    if (Done) {
		lc(cred);	/* let's lowercase them for our convenience */
		have_serverblob = 0;
		Done = FALSE;
		if (Negotiate_packet_debug_enabled) {
		    decoded = base64_decode(c);
		    debug("sending 'AF' %s to squid with data:\n", cred);
		    if (c != NULL)
			hex_dump(decoded, (strlen(c) * 3) / 4);
		    else
			fprintf(stderr, "No data available.\n");
		    printf("AF %s %s\n", c, cred);
		} else
		    SEND3("AF %s %s", c, cred);
	    } else {
		if (Negotiate_packet_debug_enabled) {
		    decoded = base64_decode(c);
		    debug("sending 'TT' to squid with data:\n");
		    hex_dump(decoded, (strlen(c) * 3) / 4);
		    printf("TT %s\n", c);
		} else {
		    SEND2("TT %s", c);
		}
		have_serverblob = 1;
	    }
	} else
	    helperfail("can't obtain server blob");
	return 1;
    }
    if (memcmp(buf, "KK ", 3) == 0) {	/* authenticate-request */
	if (!have_serverblob) {
	    helperfail("invalid server blob");
	    return 1;
	}
	/* figure out what we got */
	decoded = base64_decode(buf + 3);
	/*  Note: we don't need to manage memory at this point, since
	 *  base64_decode returns a pointer to static storage.
	 */
	if (!decoded) {		/* decoding failure, return error */
	    SEND("NA * Packet format error, couldn't base64-decode");
	    return 1;
	}
	/* check against SSPI */
	plen = (strlen(buf) - 3) * 3 / 4;	/* we only need it here. Optimization */
	c = (char *) SSP_ValidateNegotiateCredentials(decoded, plen, &Done, &status, cred);

	if (status == SSP_ERROR) {
#if FAIL_DEBUG
	    fail_debug_enabled = 1;
#endif
	    FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM |
		FORMAT_MESSAGE_IGNORE_INSERTS,
		NULL,
		GetLastError(),
		MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),	/* Default language */
		(LPTSTR) & ErrorMessage,
		0,
		NULL);
	    if (ErrorMessage[strlen(ErrorMessage) - 1] == '\n')
		ErrorMessage[strlen(ErrorMessage) - 1] = '\0';
	    if (ErrorMessage[strlen(ErrorMessage) - 1] == '\r')
		ErrorMessage[strlen(ErrorMessage) - 1] = '\0';
	    SEND2("NA * %s", ErrorMessage);
	    LocalFree(ErrorMessage);
	    return 1;
	}
	if (Done) {
	    lc(cred);		/* let's lowercase them for our convenience */
	    have_serverblob = 0;
	    Done = FALSE;
	    if (Negotiate_packet_debug_enabled) {
		decoded = base64_decode(c);
		debug("sending 'AF' %s to squid with data:\n", cred);
		if (c != NULL)
		    hex_dump(decoded, (strlen(c) * 3) / 4);
		else
		    fprintf(stderr, "No data available.\n");
		printf("AF %s %s\n", c, cred);
	    } else {
		SEND3("AF %s %s", c, cred);
	    }
	    return 1;
	} else {
	    if (Negotiate_packet_debug_enabled) {
		decoded = base64_decode(c);
		debug("sending 'TT' to squid with data:\n");
		hex_dump(decoded, (strlen(c) * 3) / 4);
		printf("TT %s\n", c);
	    } else
		SEND2("TT %s", c);
	    return 1;
	}

    } else {			/* not an auth-request */
	helperfail("illegal request received");
	fprintf(stderr, "Illegal request received: '%s'\n", buf);
	return 1;
    }
    helperfail("detected protocol error");
    return 1;
/********* END ********/
}

int
main(int argc, char *argv[])
{
    my_program_name = argv[0];

    process_options(argc, argv);

    debug("%s build " __DATE__ ", " __TIME__ " starting up...\n", my_program_name);

    if (LoadSecurityDll(SSP_NTLM, NEGOTIATE_PACKAGE_NAME) == NULL) {
	fprintf(stderr, "FATAL, can't initialize SSPI, exiting.\n");
	exit(1);
    }
    debug("SSPI initialized OK\n");

    atexit(UnloadSecurityDll);

    /* initialize FDescs */
    setbuf(stdout, NULL);
    setbuf(stderr, NULL);

    while (manage_request()) {
	/* everything is done within manage_request */
    }
    exit(0);
}
Commit	Line	Data
766743af	1
6e785d85	2	/*
2f127098	3	* mswin_negotiate_auth: helper for Negotiate Authentication for Squid Cache
6e785d85	4	*
	5	* (C)2005 Guido Serassio - Acme Consulting S.r.l.
	6	*
	7	* Authors:
	8	* Guido Serassio <guido.serassio@acmeconsulting.it>
	9	* Acme Consulting S.r.l., Italy <http://www.acmeconsulting.it>
	10	*
	11	* With contributions from others mentioned in the change history section
	12	* below.
	13	*
	14	* Based on previous work of Francesco Chemolli and Robert Collins.
	15	*
9af66127	16	* Dependencies: Windows 2000 and later.
6e785d85	17	*
	18	* This program is free software; you can redistribute it and/or modify
	19	* it under the terms of the GNU General Public License as published by
	20	* the Free Software Foundation; either version 2 of the License, or
	21	* (at your option) any later version.
	22	*
	23	* This program is distributed in the hope that it will be useful,
	24	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	25	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	26	* GNU General Public License for more details.
	27	*
	28	* You should have received a copy of the GNU General Public License
	29	* along with this program; if not, write to the Free Software
	30	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
	31	*
	32	* History:
	33	*
	34	* Version 1.0
	35	* 29-10-2005 Guido Serassio
	36	* First release.
	37	*
	38	*
	39	*/
	40
	41	#include "util.h"
	42	#if HAVE_GETOPT_H
	43	#include <getopt.h>
	44	#endif
	45	#include "negotiate.h"
	46	#if HAVE_CTYPE_H
	47	#include <ctype.h>
	48	#endif
	49
	50	#define BUFFER_SIZE 10240
	51
	52	int debug_enabled = 0;
	53	int Negotiate_packet_debug_enabled = 0;
	54
	55	static int have_serverblob;
	56
	57	/* makes a null-terminated string upper-case. Changes CONTENTS! */
	58	void
	59	uc(char *string)
	60	{
	61	char *p = string, c;
	62	while ((c = *p)) {
766743af GS	63	*p = xtoupper(c);
766743af GS	64	p++;
6e785d85	65	}
	66	}
	67
	68	/* makes a null-terminated string lower-case. Changes CONTENTS! */
	69	static void
	70	lc(char *string)
	71	{
	72	char *p = string, c;
	73	while ((c = *p)) {
766743af GS	74	*p = xtolower(c);
766743af GS	75	p++;
6e785d85	76	}
	77	}
	78
	79	void
	80	helperfail(const char *reason)
	81	{
	82	#if FAIL_DEBUG
766743af	83	fail_debug_enabled = 1;
6e785d85	84	#endif
	85	SEND2("BH %s", reason);
	86	}
	87
	88	/*
766743af GS	89	* options:
	90	* -d enable debugging.
	91	* -v enable verbose Negotiate packet debugging.
6e785d85	92	*/
	93	char *my_program_name = NULL;
	94
	95	void
	96	usage()
	97	{
	98	fprintf(stderr,
766743af GS	99	"Usage: %s [-d] [-v] [-h]\n"
	100	" -d enable debugging.\n"
	101	" -v enable verbose Negotiate packet debugging.\n"
	102	" -h this message\n\n",
	103	my_program_name);
6e785d85	104	}
	105
	106
	107	void
	108	process_options(int argc, char *argv[])
	109	{
	110	int opt, had_error = 0;
	111
766743af	112	opterr = 0;
6e785d85	113	while (-1 != (opt = getopt(argc, argv, "hdv"))) {
766743af GS	114	switch (opt) {
	115	case 'd':
	116	debug_enabled = 1;
	117	break;
	118	case 'v':
	119	debug_enabled = 1;
	120	Negotiate_packet_debug_enabled = 1;
	121	break;
	122	case 'h':
	123	usage();
	124	exit(0);
	125	case '?':
	126	opt = optopt;
	127	/* fall thru to default */
	128	default:
	129	fprintf(stderr, "unknown option: -%c. Exiting\n", opt);
	130	usage();
	131	had_error = 1;
	132	}
6e785d85	133	}
6e785d85	134	if (had_error)
766743af	135	exit(1);
6e785d85	136	}
	137
	138	int
	139	manage_request()
	140	{
	141	char buf[BUFFER_SIZE];
	142	char helper_command[3];
	143	char c, decoded;
	144	int plen, status;
	145	int oversized = 0;
766743af GS	146	char *ErrorMessage;
766743af GS	147	static char cred[SSP_MAX_CRED_LEN + 1];
6e785d85	148	BOOL Done = FALSE;
6e785d85	149
766743af	150	try_again:
26ac0430	151	if (fgets(buf, BUFFER_SIZE, stdin) == NULL)
766743af	152	return 0;
6e785d85	153
766743af	154	c = memchr(buf, '\n', BUFFER_SIZE); /* safer against overrun than strchr */
6e785d85	155	if (c) {
766743af GS	156	if (oversized) {
	157	helperfail("illegal request received");
	158	fprintf(stderr, "Illegal request received: '%s'\n", buf);
	159	return 1;
	160	}
	161	*c = '\0';
6e785d85	162	} else {
766743af GS	163	fprintf(stderr, "No newline in '%s'\n", buf);
	164	oversized = 1;
	165	goto try_again;
6e785d85	166	}
	167
	168	if ((strlen(buf) > 3) && Negotiate_packet_debug_enabled) {
766743af GS	169	decoded = base64_decode(buf + 3);
	170	strncpy(helper_command, buf, 2);
	171	debug("Got '%s' from Squid with data:\n", helper_command);
	172	hex_dump(decoded, ((strlen(buf) - 3) * 3) / 4);
6e785d85	173	} else
766743af	174	debug("Got '%s' from Squid\n", buf);
6e785d85	175
6e785d85	176	if (memcmp(buf, "YR ", 3) == 0) { /* refresh-request */
766743af GS	177	/* figure out what we got */
	178	decoded = base64_decode(buf + 3);
	179	/* Note: we don't need to manage memory at this point, since
	180	* base64_decode returns a pointer to static storage.
	181	*/
	182	if (!decoded) { /* decoding failure, return error */
	183	SEND("NA * Packet format error, couldn't base64-decode");
	184	return 1;
	185	}
	186	/* Obtain server blob against SSPI */
	187	plen = (strlen(buf) - 3) * 3 / 4; /* we only need it here. Optimization */
	188	c = (char *) SSP_MakeNegotiateBlob(decoded, plen, &Done, &status, cred);
6e785d85	189
766743af GS	190	if (status == SSP_OK) {
	191	if (Done) {
	192	lc(cred); /* let's lowercase them for our convenience */
	193	have_serverblob = 0;
	194	Done = FALSE;
	195	if (Negotiate_packet_debug_enabled) {
	196	decoded = base64_decode(c);
	197	debug("sending 'AF' %s to squid with data:\n", cred);
	198	if (c != NULL)
	199	hex_dump(decoded, (strlen(c) * 3) / 4);
	200	else
	201	fprintf(stderr, "No data available.\n");
	202	printf("AF %s %s\n", c, cred);
	203	} else
	204	SEND3("AF %s %s", c, cred);
	205	} else {
	206	if (Negotiate_packet_debug_enabled) {
	207	decoded = base64_decode(c);
	208	debug("sending 'TT' to squid with data:\n");
	209	hex_dump(decoded, (strlen(c) * 3) / 4);
	210	printf("TT %s\n", c);
	211	} else {
	212	SEND2("TT %s", c);
	213	}
	214	have_serverblob = 1;
	215	}
	216	} else
	217	helperfail("can't obtain server blob");
	218	return 1;
6e785d85	219	}
6e785d85	220	if (memcmp(buf, "KK ", 3) == 0) { /* authenticate-request */
766743af GS	221	if (!have_serverblob) {
	222	helperfail("invalid server blob");
	223	return 1;
	224	}
	225	/* figure out what we got */
	226	decoded = base64_decode(buf + 3);
	227	/* Note: we don't need to manage memory at this point, since
	228	* base64_decode returns a pointer to static storage.
	229	*/
	230	if (!decoded) { /* decoding failure, return error */
	231	SEND("NA * Packet format error, couldn't base64-decode");
	232	return 1;
	233	}
	234	/* check against SSPI */
	235	plen = (strlen(buf) - 3) * 3 / 4; /* we only need it here. Optimization */
	236	c = (char *) SSP_ValidateNegotiateCredentials(decoded, plen, &Done, &status, cred);
6e785d85	237
766743af	238	if (status == SSP_ERROR) {
6e785d85	239	#if FAIL_DEBUG
766743af	240	fail_debug_enabled = 1;
6e785d85	241	#endif
766743af GS	242	FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER \| FORMAT_MESSAGE_FROM_SYSTEM \|
	243	FORMAT_MESSAGE_IGNORE_INSERTS,
	244	NULL,
	245	GetLastError(),
	246	MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), /* Default language */
	247	(LPTSTR) & ErrorMessage,
	248	0,
	249	NULL);
	250	if (ErrorMessage[strlen(ErrorMessage) - 1] == '\n')
	251	ErrorMessage[strlen(ErrorMessage) - 1] = '\0';
	252	if (ErrorMessage[strlen(ErrorMessage) - 1] == '\r')
	253	ErrorMessage[strlen(ErrorMessage) - 1] = '\0';
	254	SEND2("NA * %s", ErrorMessage);
	255	LocalFree(ErrorMessage);
	256	return 1;
	257	}
	258	if (Done) {
	259	lc(cred); /* let's lowercase them for our convenience */
	260	have_serverblob = 0;
	261	Done = FALSE;
	262	if (Negotiate_packet_debug_enabled) {
	263	decoded = base64_decode(c);
	264	debug("sending 'AF' %s to squid with data:\n", cred);
	265	if (c != NULL)
	266	hex_dump(decoded, (strlen(c) * 3) / 4);
	267	else
	268	fprintf(stderr, "No data available.\n");
	269	printf("AF %s %s\n", c, cred);
	270	} else {
	271	SEND3("AF %s %s", c, cred);
	272	}
	273	return 1;
	274	} else {
	275	if (Negotiate_packet_debug_enabled) {
	276	decoded = base64_decode(c);
	277	debug("sending 'TT' to squid with data:\n");
	278	hex_dump(decoded, (strlen(c) * 3) / 4);
	279	printf("TT %s\n", c);
	280	} else
	281	SEND2("TT %s", c);
	282	return 1;
	283	}
6e785d85	284
766743af GS	285	} else { /* not an auth-request */
	286	helperfail("illegal request received");
	287	fprintf(stderr, "Illegal request received: '%s'\n", buf);
	288	return 1;
6e785d85	289	}
	290	helperfail("detected protocol error");
	291	return 1;
766743af	292	/******* END ******/
6e785d85	293	}
	294
	295	int
	296	main(int argc, char *argv[])
	297	{
	298	my_program_name = argv[0];
	299
	300	process_options(argc, argv);
	301
	302	debug("%s build " __DATE__ ", " __TIME__ " starting up...\n", my_program_name);
26ac0430	303
6e785d85	304	if (LoadSecurityDll(SSP_NTLM, NEGOTIATE_PACKAGE_NAME) == NULL) {
766743af GS	305	fprintf(stderr, "FATAL, can't initialize SSPI, exiting.\n");
766743af GS	306	exit(1);
6e785d85	307	}
	308	debug("SSPI initialized OK\n");
	309
	310	atexit(UnloadSecurityDll);
	311
	312	/* initialize FDescs */
	313	setbuf(stdout, NULL);
	314	setbuf(stderr, NULL);
	315
	316	while (manage_request()) {
766743af	317	/* everything is done within manage_request */
6e785d85	318	}
	319	exit(0);
	320	}