[gssapi-openssh.git] / openssh / ssh-add.c

/*
 * Author: Tatu Ylonen <ylo@cs.hut.fi>
 * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
 *                    All rights reserved
 * Adds an identity to the authentication server, or removes an identity.
 *
 * As far as I am concerned, the code I have written for this software
 * can be used freely for any purpose.  Any derived versions of this
 * software must be clearly marked as such, and if the derived work is
 * incompatible with the protocol description in the RFC file, it must be
 * called by a name other than "ssh" or "Secure Shell".
 *
 * SSH2 implementation,
 * Copyright (c) 2000, 2001 Markus Friedl.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include "includes.h"
RCSID("$OpenBSD: ssh-add.c,v 1.53 2002/03/21 22:44:05 rees Exp $");

#include <openssl/evp.h>

#include "ssh.h"
#include "rsa.h"
#include "log.h"
#include "xmalloc.h"
#include "key.h"
#include "authfd.h"
#include "authfile.h"
#include "pathnames.h"
#include "readpass.h"

#ifdef HAVE___PROGNAME
extern char *__progname;
#else
char *__progname;
#endif

/* argv0 */
extern char *__progname;

/* Default files to add */
static char *default_files[] = {
	_PATH_SSH_CLIENT_ID_RSA,
	_PATH_SSH_CLIENT_ID_DSA,
	_PATH_SSH_CLIENT_IDENTITY,
	NULL
};


/* we keep a cache of one passphrases */
static char *pass = NULL;
static void
clear_pass(void)
{
	if (pass) {
		memset(pass, 0, strlen(pass));
		xfree(pass);
		pass = NULL;
	}
}

static int
delete_file(AuthenticationConnection *ac, const char *filename)
{
	Key *public;
	char *comment = NULL;
	int ret = -1;

	public = key_load_public(filename, &comment);
	if (public == NULL) {
		printf("Bad key file %s\n", filename);
		return -1;
	}
	if (ssh_remove_identity(ac, public)) {
		fprintf(stderr, "Identity removed: %s (%s)\n", filename, comment);
		ret = 0;
	} else
		fprintf(stderr, "Could not remove identity: %s\n", filename);

	key_free(public);
	xfree(comment);

	return ret;
}

/* Send a request to remove all identities. */
static int
delete_all(AuthenticationConnection *ac)
{
	int ret = -1;

	if (ssh_remove_all_identities(ac, 1))
		ret = 0;
	/* ignore error-code for ssh2 */
	ssh_remove_all_identities(ac, 2);

	if (ret == 0)
		fprintf(stderr, "All identities removed.\n");
	else
		fprintf(stderr, "Failed to remove all identities.\n");

	return ret;
}

static int
add_file(AuthenticationConnection *ac, const char *filename)
{
	struct stat st;
	Key *private;
	char *comment = NULL;
	char msg[1024];
	int ret = -1;

	if (stat(filename, &st) < 0) {
		perror(filename);
		return -1;
	}
	/* At first, try empty passphrase */
	private = key_load_private(filename, "", &comment);
	if (comment == NULL)
		comment = xstrdup(filename);
	/* try last */
	if (private == NULL && pass != NULL)
		private = key_load_private(filename, pass, NULL);
	if (private == NULL) {
		/* clear passphrase since it did not work */
		clear_pass();
		snprintf(msg, sizeof msg, "Enter passphrase for %.200s: ",
		   comment);
		for (;;) {
			pass = read_passphrase(msg, RP_ALLOW_STDIN);
			if (strcmp(pass, "") == 0) {
				clear_pass();
				xfree(comment);
				return -1;
			}
			private = key_load_private(filename, pass, &comment);
			if (private != NULL)
				break;
			clear_pass();
			strlcpy(msg, "Bad passphrase, try again: ", sizeof msg);
		}
	}
	if (ssh_add_identity(ac, private, comment)) {
		fprintf(stderr, "Identity added: %s (%s)\n", filename, comment);
		ret = 0;
	} else
		fprintf(stderr, "Could not add identity: %s\n", filename);

	xfree(comment);
	key_free(private);

	return ret;
}

static int
update_card(AuthenticationConnection *ac, int add, const char *id)
{
	char *pin;

	pin = read_passphrase("Enter passphrase for smartcard: ", RP_ALLOW_STDIN);
	if (pin == NULL)
		return -1;

	if (ssh_update_card(ac, add, id, pin)) {
		fprintf(stderr, "Card %s: %s\n",
		    add ? "added" : "removed", id);
		return 0;
	} else {
		fprintf(stderr, "Could not %s card: %s\n",
		    add ? "add" : "remove", id);
		return -1;
	}
}

static int
list_identities(AuthenticationConnection *ac, int do_fp)
{
	Key *key;
	char *comment, *fp;
	int had_identities = 0;
	int version;

	for (version = 1; version <= 2; version++) {
		for (key = ssh_get_first_identity(ac, &comment, version);
		    key != NULL;
		    key = ssh_get_next_identity(ac, &comment, version)) {
			had_identities = 1;
			if (do_fp) {
				fp = key_fingerprint(key, SSH_FP_MD5,
				    SSH_FP_HEX);
				printf("%d %s %s (%s)\n",
				    key_size(key), fp, comment, key_type(key));
				xfree(fp);
			} else {
				if (!key_write(key, stdout))
					fprintf(stderr, "key_write failed");
				fprintf(stdout, " %s\n", comment);
			}
			key_free(key);
			xfree(comment);
		}
	}
	if (!had_identities) {
		printf("The agent has no identities.\n");
		return -1;
	}
	return 0;
}

static int
do_file(AuthenticationConnection *ac, int deleting, char *file)
{
	if (deleting) {
		if (delete_file(ac, file) == -1)
			return -1;
	} else {
		if (add_file(ac, file) == -1)
			return -1;
	}
	return 0;
}

static void
usage(void)
{
	fprintf(stderr, "Usage: %s [options]\n", __progname);
	fprintf(stderr, "Options:\n");
	fprintf(stderr, "  -l          List fingerprints of all identities.\n");
	fprintf(stderr, "  -L          List public key parameters of all identities.\n");
	fprintf(stderr, "  -d          Delete identity.\n");
	fprintf(stderr, "  -D          Delete all identities.\n");
#ifdef SMARTCARD
	fprintf(stderr, "  -s reader   Add key in smartcard reader.\n");
	fprintf(stderr, "  -e reader   Remove key in smartcard reader.\n");
#endif
}

int
main(int argc, char **argv)
{
	extern char *optarg;
	extern int optind;
	AuthenticationConnection *ac = NULL;
	char *sc_reader_id = NULL;
	int i, ch, deleting = 0, ret = 0;

	__progname = get_progname(argv[0]);
	init_rng();
	seed_rng();

	SSLeay_add_all_algorithms();

	/* At first, get a connection to the authentication agent. */
	ac = ssh_get_authentication_connection();
	if (ac == NULL) {
		fprintf(stderr, "Could not open a connection to your authentication agent.\n");
		exit(2);
	}
	while ((ch = getopt(argc, argv, "lLdDe:s:")) != -1) {
		switch (ch) {
		case 'l':
		case 'L':
			if (list_identities(ac, ch == 'l' ? 1 : 0) == -1)
				ret = 1;
			goto done;
			break;
		case 'd':
			deleting = 1;
			break;
		case 'D':
			if (delete_all(ac) == -1)
				ret = 1;
			goto done;
			break;
		case 's':
			sc_reader_id = optarg;
			break;
		case 'e':
			deleting = 1;
			sc_reader_id = optarg;
			break;
		default:
			usage();
			ret = 1;
			goto done;
		}
	}
	argc -= optind;
	argv += optind;
	if (sc_reader_id != NULL) {
		if (update_card(ac, !deleting, sc_reader_id) == -1)
			ret = 1;
		goto done;
	}
	if (argc == 0) {
		char buf[MAXPATHLEN];
		struct passwd *pw;
		struct stat st;
		int count = 0;

		if ((pw = getpwuid(getuid())) == NULL) {
			fprintf(stderr, "No user found with uid %u\n",
			    (u_int)getuid());
			ret = 1;
			goto done;
		}

		for(i = 0; default_files[i]; i++) {
			snprintf(buf, sizeof(buf), "%s/%s", pw->pw_dir,
			    default_files[i]);
			if (stat(buf, &st) < 0)
				continue;
			if (do_file(ac, deleting, buf) == -1)
				ret = 1;
			else
				count++;
		}
		if (count == 0)
			ret = 1;
	} else {
		for(i = 0; i < argc; i++) {
			if (do_file(ac, deleting, argv[i]) == -1)
				ret = 1;
		}
	}
	clear_pass();

done:
	ssh_close_authentication_connection(ac);
	return ret;
}
Commit	Line	Data
3c0ef626	1	/*
	2	* Author: Tatu Ylonen <ylo@cs.hut.fi>
	3	* Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
	4	* All rights reserved
	5	* Adds an identity to the authentication server, or removes an identity.
	6	*
	7	* As far as I am concerned, the code I have written for this software
	8	* can be used freely for any purpose. Any derived versions of this
	9	* software must be clearly marked as such, and if the derived work is
	10	* incompatible with the protocol description in the RFC file, it must be
	11	* called by a name other than "ssh" or "Secure Shell".
	12	*
	13	* SSH2 implementation,
	14	* Copyright (c) 2000, 2001 Markus Friedl. All rights reserved.
	15	*
	16	* Redistribution and use in source and binary forms, with or without
	17	* modification, are permitted provided that the following conditions
	18	* are met:
	19	* 1. Redistributions of source code must retain the above copyright
	20	* notice, this list of conditions and the following disclaimer.
	21	* 2. Redistributions in binary form must reproduce the above copyright
	22	* notice, this list of conditions and the following disclaimer in the
	23	* documentation and/or other materials provided with the distribution.
	24	*
	25	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
	26	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
	27	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
	28	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
	29	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
	30	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
	31	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
	32	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
	33	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
	34	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
	35	*/
	36
	37	#include "includes.h"
700318f3	38	RCSID("$OpenBSD: ssh-add.c,v 1.53 2002/03/21 22:44:05 rees Exp $");
3c0ef626	39
	40	#include <openssl/evp.h>
	41
	42	#include "ssh.h"
	43	#include "rsa.h"
	44	#include "log.h"
	45	#include "xmalloc.h"
	46	#include "key.h"
	47	#include "authfd.h"
	48	#include "authfile.h"
	49	#include "pathnames.h"
	50	#include "readpass.h"
	51
	52	#ifdef HAVE___PROGNAME
	53	extern char *__progname;
	54	#else
	55	char *__progname;
	56	#endif
	57
	58	/* argv0 */
	59	extern char *__progname;
	60
e9a17296	61	/* Default files to add */
	62	static char *default_files[] = {
	63	_PATH_SSH_CLIENT_ID_RSA,
	64	_PATH_SSH_CLIENT_ID_DSA,
700318f3	65	_PATH_SSH_CLIENT_IDENTITY,
e9a17296	66	NULL
	67	};
	68
	69
3c0ef626	70	/* we keep a cache of one passphrases */
	71	static char *pass = NULL;
	72	static void
	73	clear_pass(void)
	74	{
	75	if (pass) {
	76	memset(pass, 0, strlen(pass));
	77	xfree(pass);
	78	pass = NULL;
	79	}
	80	}
	81
	82	static int
	83	delete_file(AuthenticationConnection ac, const char filename)
	84	{
	85	Key *public;
	86	char *comment = NULL;
	87	int ret = -1;
	88
	89	public = key_load_public(filename, &comment);
	90	if (public == NULL) {
	91	printf("Bad key file %s\n", filename);
	92	return -1;
	93	}
	94	if (ssh_remove_identity(ac, public)) {
	95	fprintf(stderr, "Identity removed: %s (%s)\n", filename, comment);
	96	ret = 0;
	97	} else
	98	fprintf(stderr, "Could not remove identity: %s\n", filename);
	99
	100	key_free(public);
	101	xfree(comment);
e9a17296	102
3c0ef626	103	return ret;
	104	}
	105
	106	/* Send a request to remove all identities. */
	107	static int
	108	delete_all(AuthenticationConnection *ac)
	109	{
	110	int ret = -1;
	111
	112	if (ssh_remove_all_identities(ac, 1))
	113	ret = 0;
	114	/* ignore error-code for ssh2 */
	115	ssh_remove_all_identities(ac, 2);
	116
	117	if (ret == 0)
	118	fprintf(stderr, "All identities removed.\n");
	119	else
	120	fprintf(stderr, "Failed to remove all identities.\n");
	121
	122	return ret;
	123	}
	124
	125	static int
	126	add_file(AuthenticationConnection ac, const char filename)
	127	{
	128	struct stat st;
	129	Key *private;
	130	char *comment = NULL;
	131	char msg[1024];
	132	int ret = -1;
	133
	134	if (stat(filename, &st) < 0) {
	135	perror(filename);
	136	return -1;
	137	}
	138	/* At first, try empty passphrase */
	139	private = key_load_private(filename, "", &comment);
	140	if (comment == NULL)
	141	comment = xstrdup(filename);
	142	/* try last */
	143	if (private == NULL && pass != NULL)
	144	private = key_load_private(filename, pass, NULL);
	145	if (private == NULL) {
	146	/* clear passphrase since it did not work */
	147	clear_pass();
	148	snprintf(msg, sizeof msg, "Enter passphrase for %.200s: ",
	149	comment);
	150	for (;;) {
	151	pass = read_passphrase(msg, RP_ALLOW_STDIN);
	152	if (strcmp(pass, "") == 0) {
	153	clear_pass();
	154	xfree(comment);
	155	return -1;
	156	}
	157	private = key_load_private(filename, pass, &comment);
	158	if (private != NULL)
	159	break;
	160	clear_pass();
	161	strlcpy(msg, "Bad passphrase, try again: ", sizeof msg);
	162	}
	163	}
	164	if (ssh_add_identity(ac, private, comment)) {
	165	fprintf(stderr, "Identity added: %s (%s)\n", filename, comment);
	166	ret = 0;
167	} else
168	fprintf(stderr, "Could not add identity: %s\n", filename);
169
170	xfree(comment);
171	key_free(private);
e9a17296	172
3c0ef626	173	return ret;
	174	}
	175
	176	static int
	177	update_card(AuthenticationConnection ac, int add, const char id)
	178	{
700318f3	179	char *pin;
	180
	181	pin = read_passphrase("Enter passphrase for smartcard: ", RP_ALLOW_STDIN);
	182	if (pin == NULL)
	183	return -1;
	184
	185	if (ssh_update_card(ac, add, id, pin)) {
3c0ef626	186	fprintf(stderr, "Card %s: %s\n",
e9a17296	187	add ? "added" : "removed", id);
3c0ef626	188	return 0;
	189	} else {
	190	fprintf(stderr, "Could not %s card: %s\n",
e9a17296	191	add ? "add" : "remove", id);
3c0ef626	192	return -1;
	193	}
	194	}
	195
e9a17296	196	static int
3c0ef626	197	list_identities(AuthenticationConnection *ac, int do_fp)
	198	{
	199	Key *key;
	200	char comment, fp;
	201	int had_identities = 0;
	202	int version;
	203
	204	for (version = 1; version <= 2; version++) {
	205	for (key = ssh_get_first_identity(ac, &comment, version);
e9a17296	206	key != NULL;
e9a17296	207	key = ssh_get_next_identity(ac, &comment, version)) {
3c0ef626	208	had_identities = 1;
	209	if (do_fp) {
	210	fp = key_fingerprint(key, SSH_FP_MD5,
	211	SSH_FP_HEX);
	212	printf("%d %s %s (%s)\n",
	213	key_size(key), fp, comment, key_type(key));
	214	xfree(fp);
	215	} else {
	216	if (!key_write(key, stdout))
	217	fprintf(stderr, "key_write failed");
	218	fprintf(stdout, " %s\n", comment);
	219	}
	220	key_free(key);
	221	xfree(comment);
	222	}
	223	}
e9a17296	224	if (!had_identities) {
3c0ef626	225	printf("The agent has no identities.\n");
e9a17296	226	return -1;
	227	}
	228	return 0;
	229	}
	230
	231	static int
	232	do_file(AuthenticationConnection ac, int deleting, char file)
	233	{
	234	if (deleting) {
	235	if (delete_file(ac, file) == -1)
	236	return -1;
	237	} else {
	238	if (add_file(ac, file) == -1)
	239	return -1;
	240	}
	241	return 0;
3c0ef626	242	}
	243
	244	static void
	245	usage(void)
	246	{
	247	fprintf(stderr, "Usage: %s [options]\n", __progname);
	248	fprintf(stderr, "Options:\n");
	249	fprintf(stderr, " -l List fingerprints of all identities.\n");
	250	fprintf(stderr, " -L List public key parameters of all identities.\n");
	251	fprintf(stderr, " -d Delete identity.\n");
	252	fprintf(stderr, " -D Delete all identities.\n");
	253	#ifdef SMARTCARD
	254	fprintf(stderr, " -s reader Add key in smartcard reader.\n");
	255	fprintf(stderr, " -e reader Remove key in smartcard reader.\n");
	256	#endif
	257	}
	258
	259	int
	260	main(int argc, char **argv)
	261	{
	262	extern char *optarg;
	263	extern int optind;
	264	AuthenticationConnection *ac = NULL;
3c0ef626	265	char *sc_reader_id = NULL;
	266	int i, ch, deleting = 0, ret = 0;
	267
	268	__progname = get_progname(argv[0]);
	269	init_rng();
	270	seed_rng();
	271
	272	SSLeay_add_all_algorithms();
	273
	274	/* At first, get a connection to the authentication agent. */
	275	ac = ssh_get_authentication_connection();
	276	if (ac == NULL) {
	277	fprintf(stderr, "Could not open a connection to your authentication agent.\n");
e9a17296	278	exit(2);
3c0ef626	279	}
e9a17296	280	while ((ch = getopt(argc, argv, "lLdDe:s:")) != -1) {
3c0ef626	281	switch (ch) {
	282	case 'l':
	283	case 'L':
e9a17296	284	if (list_identities(ac, ch == 'l' ? 1 : 0) == -1)
e9a17296	285	ret = 1;
3c0ef626	286	goto done;
	287	break;
	288	case 'd':
	289	deleting = 1;
	290	break;
	291	case 'D':
	292	if (delete_all(ac) == -1)
	293	ret = 1;
	294	goto done;
	295	break;
	296	case 's':
	297	sc_reader_id = optarg;
	298	break;
	299	case 'e':
e9a17296	300	deleting = 1;
3c0ef626	301	sc_reader_id = optarg;
	302	break;
	303	default:
	304	usage();
	305	ret = 1;
	306	goto done;
	307	}
	308	}
	309	argc -= optind;
	310	argv += optind;
	311	if (sc_reader_id != NULL) {
	312	if (update_card(ac, !deleting, sc_reader_id) == -1)
	313	ret = 1;
	314	goto done;
	315	}
	316	if (argc == 0) {
e9a17296	317	char buf[MAXPATHLEN];
e9a17296	318	struct passwd *pw;
700318f3	319	struct stat st;
700318f3	320	int count = 0;
e9a17296	321
e9a17296	322	if ((pw = getpwuid(getuid())) == NULL) {
3c0ef626	323	fprintf(stderr, "No user found with uid %u\n",
	324	(u_int)getuid());
	325	ret = 1;
	326	goto done;
	327	}
e9a17296	328
e9a17296	329	for(i = 0; default_files[i]; i++) {
700318f3	330	snprintf(buf, sizeof(buf), "%s/%s", pw->pw_dir,
e9a17296	331	default_files[i]);
700318f3	332	if (stat(buf, &st) < 0)
700318f3	333	continue;
e9a17296	334	if (do_file(ac, deleting, buf) == -1)
3c0ef626	335	ret = 1;
700318f3	336	else
700318f3	337	count++;
3c0ef626	338	}
700318f3	339	if (count == 0)
700318f3	340	ret = 1;
3c0ef626	341	} else {
e9a17296	342	for(i = 0; i < argc; i++) {
	343	if (do_file(ac, deleting, argv[i]) == -1)
	344	ret = 1;
3c0ef626	345	}
	346	}
	347	clear_pass();
	348
	349	done:
	350	ssh_close_authentication_connection(ac);
	351	return ret;
	352	}