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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2005 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
#include <sys/types.h>
#include <unistd.h>
#include <rpc/rpc.h>
#include <rpc/key_prot.h>
#include <rpcsvc/nis_dhext.h>
#include <syslog.h>
#include <note.h>
/* defined in usr/src/libnsl/rpc/key_call.c */
extern bool_t (*__key_encryptsession_pk_LOCAL)();
extern bool_t (*__key_decryptsession_pk_LOCAL)();
extern bool_t (*__key_gendes_LOCAL)();
#define CLASSIC_PK_DH(k, a) (((k) == 192) && ((a) == 0))
/*
* authsys_create_uid(uid_t uid)
*
* Create SYS (UNIX) style authenticator for the given uid/gid
* We don't include suplementary groups, since these are of no
* interest for the keyserv operations that we do.
*/
AUTH *
authsys_create_uid(uid_t uid, gid_t gid)
{
char host[MAX_MACHINE_NAME + 1];
AUTH *res;
if (gethostname(host, sizeof (host) - 1) == -1) {
syslog(LOG_ERR,
"pam_dhkeys: Can't determine hostname: %m");
return (NULL);
}
host[MAX_MACHINE_NAME] = '\0';
res = authsys_create(host, uid, gid, 0, (gid_t *)NULL);
return (res);
}
/*
* my_key_call(proc, xdr_arg, arg, xdr_rslt, rslt, uit, gid)
*
* my_key_call is a copy of key_call() from libnsl with the
* added AUTHSYS rpc credential to make the keyserver use our
* REAL UID instead of our EFFECTIVE UID when handling our keys.
*/
int
my_key_call(rpcproc_t proc, xdrproc_t xdr_arg, char *arg,
xdrproc_t xdr_rslt, char *rslt, uid_t uid, gid_t gid)
{
CLIENT *clnt;
struct timeval wait_time = {0, 0};
enum clnt_stat status;
int vers;
if (proc == KEY_ENCRYPT_PK && __key_encryptsession_pk_LOCAL) {
cryptkeyres res;
bool_t r;
r = (*__key_encryptsession_pk_LOCAL)(uid, arg, &res);
if (r == TRUE) {
/* LINTED pointer alignment */
*(cryptkeyres*)rslt = res;
return (1);
}
return (0);
}
if (proc == KEY_DECRYPT_PK && __key_decryptsession_pk_LOCAL) {
cryptkeyres res;
bool_t r;
r = (*__key_decryptsession_pk_LOCAL)(uid, arg, &res);
if (r == TRUE) {
/* LINTED pointer alignment */
*(cryptkeyres*)rslt = res;
return (1);
}
return (0);
}
if (proc == KEY_GEN && __key_gendes_LOCAL) {
des_block res;
bool_t r;
r = (*__key_gendes_LOCAL)(uid, 0, &res);
if (r == TRUE) {
/* LINTED pointer alignment */
*(des_block*)rslt = res;
return (1);
}
return (0);
}
if ((proc == KEY_ENCRYPT_PK) || (proc == KEY_DECRYPT_PK) ||
(proc == KEY_NET_GET) || (proc == KEY_NET_PUT) ||
(proc == KEY_GET_CONV))
vers = 2; /* talk to version 2 */
else
vers = 1; /* talk to version 1 */
clnt = clnt_door_create(KEY_PROG, vers, 0);
if (clnt == NULL)
return (0);
clnt->cl_auth = authsys_create_uid(uid, gid);
status = CLNT_CALL(clnt, proc, xdr_arg, arg, xdr_rslt,
rslt, wait_time);
auth_destroy(clnt->cl_auth);
clnt_destroy(clnt);
return (status == RPC_SUCCESS ? 1 : 0);
}
int
key_setnet_uid(struct key_netstarg *arg, uid_t uid, gid_t gid)
{
keystatus status;
if (!my_key_call((rpcproc_t)KEY_NET_PUT, xdr_key_netstarg,
(char *)arg, xdr_keystatus, (char *)&status, uid, gid)) {
return (-1);
}
if (status != KEY_SUCCESS) {
return (-1);
}
return (1);
}
int
key_setnet_g_uid(const char *netname, const char *skey, keylen_t skeylen,
const char *pkey, keylen_t pkeylen, algtype_t algtype,
uid_t uid, gid_t gid)
{
key_netstarg3 arg;
keystatus status;
arg.st_netname = (char *)netname;
arg.algtype = algtype;
if (skeylen == 0)
arg.st_priv_key.keybuf3_len = 0;
else
arg.st_priv_key.keybuf3_len = skeylen/4 + 1;
arg.st_priv_key.keybuf3_val = (char *)skey;
if (pkeylen == 0)
arg.st_pub_key.keybuf3_len = 0;
else
arg.st_pub_key.keybuf3_len = pkeylen/4 + 1;
arg.st_pub_key.keybuf3_val = (char *)pkey;
if (skeylen == 0) {
if (pkeylen == 0) {
/* debug("keylens are both 0"); */
return (-1);
}
arg.keylen = pkeylen;
} else {
if ((pkeylen != 0) && (skeylen != pkeylen)) {
/* debug("keylens don't match"); */
return (-1);
}
arg.keylen = skeylen;
}
if (CLASSIC_PK_DH(arg.keylen, arg.algtype)) {
key_netstarg tmp;
if (skeylen != 0) {
(void) memcpy(&tmp.st_priv_key, skey,
sizeof (tmp.st_priv_key));
} else {
(void) memset(&tmp.st_priv_key, 0,
sizeof (tmp.st_priv_key));
}
if (pkeylen != 0) {
(void) memcpy(&tmp.st_pub_key, skey,
sizeof (tmp.st_pub_key));
} else {
(void) memset(&tmp.st_pub_key, 0,
sizeof (tmp.st_pub_key));
}
tmp.st_netname = (char *)netname;
return (key_setnet_uid(&tmp, uid, gid));
}
if (!my_key_call((rpcproc_t)KEY_NET_PUT_3, xdr_key_netstarg3,
(char *)&arg, xdr_keystatus, (char *)&status, uid, gid)) {
return (-1);
}
if (status != KEY_SUCCESS) {
/* debug("key_setnet3 status is nonzero"); */
return (-1);
}
return (0);
}
/*
* key_secretkey_is_set_uid() returns 1 if the keyserver has a secret key
* stored for the caller's REAL uid; it returns 0 otherwise
*/
int
key_secretkey_is_set_uid(uid_t uid, gid_t gid)
{
struct key_netstres kres;
(void) memset((void*)&kres, 0, sizeof (kres));
if (my_key_call((rpcproc_t)KEY_NET_GET, xdr_void, (char *)NULL,
xdr_key_netstres, (char *)&kres, uid, gid) &&
(kres.status == KEY_SUCCESS) &&
(kres.key_netstres_u.knet.st_priv_key[0] != 0)) {
/* avoid leaving secret key in memory */
(void) memset(kres.key_netstres_u.knet.st_priv_key, 0,
HEXKEYBYTES);
xdr_free(xdr_key_netstres, (char *)&kres);
return (1);
}
return (0);
}
int
key_removesecret_g_uid(uid_t uid, gid_t gid)
{
keystatus status;
if (my_key_call((rpcproc_t)KEY_CLEAR_3, xdr_void, (char *)NULL,
xdr_keystatus, (char *)&status, uid, gid))
return (-1);
if (status != KEY_SUCCESS)
return (-1);
return (0);
}
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