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

/*
 * win32_ntlm_auth: helper for NTLM 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 NT4 SP4 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 = toupper(c);
	p++;
    }
}

/* makes a null-terminated string lower-case. Changes CONTENTS! */
static void
lc(char *string)
{
    char *p = string, c;
    while ((c = *p)) {
	*p = tolower(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 NTLM packet debugging.
 */
char *my_program_name = NULL;

void
usage()
{
    fprintf(stderr,
	"Usage: %s [-d] [-v] [-h]\n"
	" -d  enable debugging.\n"
        " -v  enable verbose NTLM 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) {
                    printf("AF %s %s\n",c,cred);
                    decoded = base64_decode(c);
	            debug("sending 'AF' %s to squid with data:\n", cred);
                    hex_dump(decoded, (strlen(c) * 3) / 4);
                } else
                    SEND3("AF %s %s", c, cred);
            } else {
                if (Negotiate_packet_debug_enabled) {
                    printf("TT %s\n",c);
                    decoded = base64_decode(c);
	            debug("sending 'TT' to squid with data:\n");
                    hex_dump(decoded, (strlen(c) * 3) / 4);
                } 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) {
                printf("AF %s %s\n",c,cred);
                decoded = base64_decode(c);
	        debug("sending 'AF' %s to squid with data:\n", cred);
                hex_dump(decoded, (strlen(c) * 3) / 4);
            } else {
                SEND3("AF %s %s", c, cred);
            }
	    return 1;
        } else {
            if (Negotiate_packet_debug_enabled) {
                printf("TT %s\n",c);
                decoded = base64_decode(c);
	        debug("sending 'TT' to squid with data:\n");
                hex_dump(decoded, (strlen(c) * 3) / 4);
            } 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
6e785d85	1	/*
	2	* win32_ntlm_auth: helper for NTLM Authentication for Squid Cache
	3	*
	4	* (C)2005 Guido Serassio - Acme Consulting S.r.l.
	5	*
	6	* Authors:
	7	* Guido Serassio <guido.serassio@acmeconsulting.it>
	8	* Acme Consulting S.r.l., Italy <http://www.acmeconsulting.it>
	9	*
	10	* With contributions from others mentioned in the change history section
	11	* below.
	12	*
	13	* Based on previous work of Francesco Chemolli and Robert Collins.
	14	*
	15	* Dependencies: Windows NT4 SP4 and later.
	16	*
	17	* This program is free software; you can redistribute it and/or modify
	18	* it under the terms of the GNU General Public License as published by
	19	* the Free Software Foundation; either version 2 of the License, or
	20	* (at your option) any later version.
	21	*
	22	* This program is distributed in the hope that it will be useful,
	23	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	24	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	25	* GNU General Public License for more details.
	26	*
	27	* You should have received a copy of the GNU General Public License
	28	* along with this program; if not, write to the Free Software
	29	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
	30	*
	31	* History:
	32	*
	33	* Version 1.0
	34	* 29-10-2005 Guido Serassio
	35	* First release.
	36	*
	37	*
	38	*/
	39
	40	#include "util.h"
	41	#if HAVE_GETOPT_H
	42	#include <getopt.h>
	43	#endif
	44	#include "negotiate.h"
	45	#if HAVE_CTYPE_H
	46	#include <ctype.h>
	47	#endif
	48
	49	#define BUFFER_SIZE 10240
	50
	51	int debug_enabled = 0;
	52	int Negotiate_packet_debug_enabled = 0;
	53
	54	static int have_serverblob;
	55
	56	/* makes a null-terminated string upper-case. Changes CONTENTS! */
	57	void
	58	uc(char *string)
	59	{
	60	char *p = string, c;
	61	while ((c = *p)) {
	62	*p = toupper(c);
	63	p++;
	64	}
65	}
66
67	/* makes a null-terminated string lower-case. Changes CONTENTS! */
68	static void
69	lc(char *string)
70	{
71	char *p = string, c;
72	while ((c = *p)) {
73	*p = tolower(c);
74	p++;
75	}
76	}
77
78	void
79	helperfail(const char *reason)
80	{
81	#if FAIL_DEBUG
82	fail_debug_enabled =1;
83	#endif
84	SEND2("BH %s", reason);
85	}
86
87	/*
88	options:
89	-d enable debugging.
90	-v enable verbose NTLM packet debugging.
91	*/
92	char *my_program_name = NULL;
93
94	void
95	usage()
96	{
97	fprintf(stderr,
98	"Usage: %s [-d] [-v] [-h]\n"
99	" -d enable debugging.\n"
100	" -v enable verbose NTLM packet debugging.\n"
101	" -h this message\n\n",
102	my_program_name);
103	}
104
105
106	void
107	process_options(int argc, char *argv[])
108	{
109	int opt, had_error = 0;
110
111	opterr =0;
112	while (-1 != (opt = getopt(argc, argv, "hdv"))) {
113	switch (opt) {
114	case 'd':
115	debug_enabled = 1;
116	break;
117	case 'v':
118	debug_enabled = 1;
119	Negotiate_packet_debug_enabled = 1;
120	break;
121	case 'h':
122	usage();
123	exit(0);
124	case '?':
125	opt = optopt;
126	/* fall thru to default */
127	default:
128	fprintf(stderr, "unknown option: -%c. Exiting\n", opt);
129	usage();
130	had_error = 1;
131	}
132	}
133	if (had_error)
134	exit(1);
135	}
136
137	int
138	manage_request()
139	{
140	char buf[BUFFER_SIZE];
141	char helper_command[3];
142	char c, decoded;
143	int plen, status;
144	int oversized = 0;
145	char * ErrorMessage;
146	static char cred[SSP_MAX_CRED_LEN+1];
147	BOOL Done = FALSE;
148
149	try_again:
150	if (fgets(buf, BUFFER_SIZE, stdin) == NULL)
151	return 0;
152
153	c = memchr(buf, '\n', BUFFER_SIZE); /* safer against overrun than strchr */
154	if (c) {
155	if (oversized) {
156	helperfail("illegal request received");
157	fprintf(stderr, "Illegal request received: '%s'\n", buf);
158	return 1;
159	}
160	*c = '\0';
161	} else {
162	fprintf(stderr, "No newline in '%s'\n", buf);
163	oversized = 1;
164	goto try_again;
165	}
166
167	if ((strlen(buf) > 3) && Negotiate_packet_debug_enabled) {
168	decoded = base64_decode(buf + 3);
169	strncpy(helper_command, buf, 2);
170	debug("Got '%s' from Squid with data:\n", helper_command);
171	hex_dump(decoded, ((strlen(buf) - 3) * 3) / 4);
172	} else
173	debug("Got '%s' from Squid\n", buf);
174
175	if (memcmp(buf, "YR ", 3) == 0) { /* refresh-request */
176	/* figure out what we got */
177	decoded = base64_decode(buf + 3);
178	/* Note: we don't need to manage memory at this point, since
179	* base64_decode returns a pointer to static storage.
180	*/
181	if (!decoded) { /* decoding failure, return error */
182	SEND("NA * Packet format error, couldn't base64-decode");
183	return 1;
184	}
185	/* Obtain server blob against SSPI */
186	plen = (strlen(buf) - 3) * 3 / 4; /* we only need it here. Optimization */
187	c = (char *) SSP_MakeNegotiateBlob(decoded, plen, &Done, &status, cred);
188
189	if (status == SSP_OK) {
190	if (Done) {
191	lc(cred); /* let's lowercase them for our convenience */
192	have_serverblob = 0;
193	Done = FALSE;
194	if (Negotiate_packet_debug_enabled) {
195	printf("AF %s %s\n",c,cred);
196	decoded = base64_decode(c);
197	debug("sending 'AF' %s to squid with data:\n", cred);
198	hex_dump(decoded, (strlen(c) * 3) / 4);
199	} else
200	SEND3("AF %s %s", c, cred);
201	} else {
202	if (Negotiate_packet_debug_enabled) {
203	printf("TT %s\n",c);
204	decoded = base64_decode(c);
205	debug("sending 'TT' to squid with data:\n");
206	hex_dump(decoded, (strlen(c) * 3) / 4);
207	} else {
208	SEND2("TT %s", c);
209	}
210	have_serverblob = 1;
211	}
212	} else
213	helperfail("can't obtain server blob");
214	return 1;
215	}
216
217	if (memcmp(buf, "KK ", 3) == 0) { /* authenticate-request */
218	if (!have_serverblob) {
219	helperfail("invalid server blob");
220	return 1;
221	}
222	/* figure out what we got */
223	decoded = base64_decode(buf + 3);
224	/* Note: we don't need to manage memory at this point, since
225	* base64_decode returns a pointer to static storage.
226	*/
227	if (!decoded) { /* decoding failure, return error */
228	SEND("NA * Packet format error, couldn't base64-decode");
229	return 1;
230	}
231
232	/* check against SSPI */
233	plen = (strlen(buf) - 3) * 3 / 4; /* we only need it here. Optimization */
234	c = (char *) SSP_ValidateNegotiateCredentials(decoded, plen, &Done, &status, cred);
235
236	if (status == SSP_ERROR) {
237	#if FAIL_DEBUG
238	fail_debug_enabled = 1;
239	#endif
240	FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER \| FORMAT_MESSAGE_FROM_SYSTEM \|
241	FORMAT_MESSAGE_IGNORE_INSERTS,
242	NULL,
243	GetLastError(),
244	MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), /* Default language */
245	(LPTSTR) &ErrorMessage,
246	0,
247	NULL);
248	if (ErrorMessage[strlen(ErrorMessage) - 1] == '\n')
249	ErrorMessage[strlen(ErrorMessage) - 1] = '\0';
250	if (ErrorMessage[strlen(ErrorMessage) - 1] == '\r')
251	ErrorMessage[strlen(ErrorMessage) - 1] = '\0';
252	SEND2("NA * %s", ErrorMessage);
253	LocalFree(ErrorMessage);
254	return 1;
255	}
256
257	if (Done) {
258	lc(cred); /* let's lowercase them for our convenience */
259	have_serverblob = 0;
260	Done = FALSE;
261	if (Negotiate_packet_debug_enabled) {
262	printf("AF %s %s\n",c,cred);
263	decoded = base64_decode(c);
264	debug("sending 'AF' %s to squid with data:\n", cred);
265	hex_dump(decoded, (strlen(c) * 3) / 4);
266	} else {
267	SEND3("AF %s %s", c, cred);
268	}
269	return 1;
270	} else {
271	if (Negotiate_packet_debug_enabled) {
272	printf("TT %s\n",c);
273	decoded = base64_decode(c);
274	debug("sending 'TT' to squid with data:\n");
275	hex_dump(decoded, (strlen(c) * 3) / 4);
276	} else
277	SEND2("TT %s", c);
278	return 1;
279	}
280
281	} else { /* not an auth-request */
282	helperfail("illegal request received");
283	fprintf(stderr, "Illegal request received: '%s'\n", buf);
284	return 1;
285	}
286	helperfail("detected protocol error");
287	return 1;
288	/******* END ******/
289	}
290
291	int
292	main(int argc, char *argv[])
293	{
294	my_program_name = argv[0];
295
296	process_options(argc, argv);
297
298	debug("%s build " __DATE__ ", " __TIME__ " starting up...\n", my_program_name);
299
300	if (LoadSecurityDll(SSP_NTLM, NEGOTIATE_PACKAGE_NAME) == NULL) {
301	fprintf(stderr, "FATAL, can't initialize SSPI, exiting.\n");
302	exit(1);
303	}
304	debug("SSPI initialized OK\n");
305
306	atexit(UnloadSecurityDll);
307
308	/* initialize FDescs */
309	setbuf(stdout, NULL);
310	setbuf(stderr, NULL);
311
312	while (manage_request()) {
313	/* everything is done within manage_request */
314	}
315	exit(0);
316	}