17c478bd9Sstevel@tonic-gate /*
27c478bd9Sstevel@tonic-gate * CDDL HEADER START
37c478bd9Sstevel@tonic-gate *
47c478bd9Sstevel@tonic-gate * The contents of this file are subject to the terms of the
545916cd2Sjpk * Common Development and Distribution License (the "License").
645916cd2Sjpk * You may not use this file except in compliance with the License.
77c478bd9Sstevel@tonic-gate *
87c478bd9Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
97c478bd9Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing.
107c478bd9Sstevel@tonic-gate * See the License for the specific language governing permissions
117c478bd9Sstevel@tonic-gate * and limitations under the License.
127c478bd9Sstevel@tonic-gate *
137c478bd9Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each
147c478bd9Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
157c478bd9Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the
167c478bd9Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying
177c478bd9Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner]
187c478bd9Sstevel@tonic-gate *
197c478bd9Sstevel@tonic-gate * CDDL HEADER END
207c478bd9Sstevel@tonic-gate */
217c478bd9Sstevel@tonic-gate /*
22*005d3febSMarek Pospisil * Copyright 2010 Sun Microsystems, Inc. All rights reserved.
237c478bd9Sstevel@tonic-gate * Use is subject to license terms.
247c478bd9Sstevel@tonic-gate */
257c478bd9Sstevel@tonic-gate
267c478bd9Sstevel@tonic-gate #include <sys/param.h>
277c478bd9Sstevel@tonic-gate #include <sys/types.h>
287c478bd9Sstevel@tonic-gate #include <sys/ucred.h>
297c478bd9Sstevel@tonic-gate #include <sys/file.h>
307c478bd9Sstevel@tonic-gate #include <sys/errno.h>
317c478bd9Sstevel@tonic-gate #include <sys/systm.h>
327c478bd9Sstevel@tonic-gate #include <sys/stream.h>
337c478bd9Sstevel@tonic-gate #include <sys/strsun.h>
347c478bd9Sstevel@tonic-gate #include <sys/stropts.h>
357c478bd9Sstevel@tonic-gate #include <sys/vfs.h>
367c478bd9Sstevel@tonic-gate #include <sys/vnode.h>
377c478bd9Sstevel@tonic-gate #include <sys/cmn_err.h>
387c478bd9Sstevel@tonic-gate #include <sys/socket.h>
397c478bd9Sstevel@tonic-gate #include <sys/strsubr.h>
407c478bd9Sstevel@tonic-gate #include <c2/audit.h>
417c478bd9Sstevel@tonic-gate
427c478bd9Sstevel@tonic-gate /*
437c478bd9Sstevel@tonic-gate * Getpeerucred system call implementation.
447c478bd9Sstevel@tonic-gate */
457c478bd9Sstevel@tonic-gate static int
getpeerucred(int fd,void * buf)467c478bd9Sstevel@tonic-gate getpeerucred(int fd, void *buf)
477c478bd9Sstevel@tonic-gate {
487c478bd9Sstevel@tonic-gate file_t *fp;
497c478bd9Sstevel@tonic-gate struct ucred_s *uc;
507c478bd9Sstevel@tonic-gate vnode_t *vp;
517c478bd9Sstevel@tonic-gate k_peercred_t kpc;
527c478bd9Sstevel@tonic-gate int err;
537c478bd9Sstevel@tonic-gate int32_t rval;
547c478bd9Sstevel@tonic-gate
557c478bd9Sstevel@tonic-gate kpc.pc_cr = NULL;
567c478bd9Sstevel@tonic-gate kpc.pc_cpid = -1;
577c478bd9Sstevel@tonic-gate
587c478bd9Sstevel@tonic-gate if ((fp = getf(fd)) == NULL)
597c478bd9Sstevel@tonic-gate return (set_errno(EBADF));
607c478bd9Sstevel@tonic-gate
617c478bd9Sstevel@tonic-gate vp = fp->f_vnode;
627c478bd9Sstevel@tonic-gate
637c478bd9Sstevel@tonic-gate switch (vp->v_type) {
647c478bd9Sstevel@tonic-gate case VFIFO:
657c478bd9Sstevel@tonic-gate case VSOCK:
667c478bd9Sstevel@tonic-gate err = VOP_IOCTL(vp, _I_GETPEERCRED, (intptr_t)&kpc,
67da6c28aaSamw FKIOCTL, CRED(), &rval, NULL);
687c478bd9Sstevel@tonic-gate break;
697c478bd9Sstevel@tonic-gate case VCHR: {
707c478bd9Sstevel@tonic-gate struct strioctl strioc;
717c478bd9Sstevel@tonic-gate
727c478bd9Sstevel@tonic-gate if (vp->v_stream == NULL) {
737c478bd9Sstevel@tonic-gate err = ENOTSUP;
747c478bd9Sstevel@tonic-gate break;
757c478bd9Sstevel@tonic-gate }
767c478bd9Sstevel@tonic-gate strioc.ic_cmd = _I_GETPEERCRED;
777c478bd9Sstevel@tonic-gate strioc.ic_timout = INFTIM;
787c478bd9Sstevel@tonic-gate strioc.ic_len = (int)sizeof (k_peercred_t);
797c478bd9Sstevel@tonic-gate strioc.ic_dp = (char *)&kpc;
807c478bd9Sstevel@tonic-gate
817c478bd9Sstevel@tonic-gate err = strdoioctl(vp->v_stream, &strioc, FNATIVE|FKIOCTL,
827c478bd9Sstevel@tonic-gate STR_NOSIG|K_TO_K, CRED(), &rval);
837c478bd9Sstevel@tonic-gate
847c478bd9Sstevel@tonic-gate /*
857c478bd9Sstevel@tonic-gate * Map all unexpected error codes to ENOTSUP.
867c478bd9Sstevel@tonic-gate */
877c478bd9Sstevel@tonic-gate switch (err) {
887c478bd9Sstevel@tonic-gate case 0:
897c478bd9Sstevel@tonic-gate case ENOTSUP:
907c478bd9Sstevel@tonic-gate case ENOTCONN:
917c478bd9Sstevel@tonic-gate case ENOMEM:
927c478bd9Sstevel@tonic-gate break;
937c478bd9Sstevel@tonic-gate default:
947c478bd9Sstevel@tonic-gate err = ENOTSUP;
957c478bd9Sstevel@tonic-gate break;
967c478bd9Sstevel@tonic-gate }
977c478bd9Sstevel@tonic-gate break;
987c478bd9Sstevel@tonic-gate }
997c478bd9Sstevel@tonic-gate default:
1007c478bd9Sstevel@tonic-gate err = ENOTSUP;
1017c478bd9Sstevel@tonic-gate break;
1027c478bd9Sstevel@tonic-gate }
1037c478bd9Sstevel@tonic-gate releasef(fd);
1047c478bd9Sstevel@tonic-gate
1057c478bd9Sstevel@tonic-gate /*
1067c478bd9Sstevel@tonic-gate * If someone gave us a credential, err will be 0.
1077c478bd9Sstevel@tonic-gate */
1087c478bd9Sstevel@tonic-gate if (kpc.pc_cr != NULL) {
1097c478bd9Sstevel@tonic-gate ASSERT(err == 0);
1107c478bd9Sstevel@tonic-gate
11145916cd2Sjpk uc = cred2ucred(kpc.pc_cr, kpc.pc_cpid, NULL, CRED());
1127c478bd9Sstevel@tonic-gate
1137c478bd9Sstevel@tonic-gate crfree(kpc.pc_cr);
1147c478bd9Sstevel@tonic-gate
1157c478bd9Sstevel@tonic-gate err = copyout(uc, buf, uc->uc_size);
1167c478bd9Sstevel@tonic-gate
1177c478bd9Sstevel@tonic-gate kmem_free(uc, uc->uc_size);
1187c478bd9Sstevel@tonic-gate
1197c478bd9Sstevel@tonic-gate if (err != 0)
1207c478bd9Sstevel@tonic-gate return (set_errno(EFAULT));
1217c478bd9Sstevel@tonic-gate
1227c478bd9Sstevel@tonic-gate return (0);
1237c478bd9Sstevel@tonic-gate }
1247c478bd9Sstevel@tonic-gate return (set_errno(err));
1257c478bd9Sstevel@tonic-gate }
1267c478bd9Sstevel@tonic-gate
1277c478bd9Sstevel@tonic-gate static int
ucred_get(pid_t pid,void * ubuf)1287c478bd9Sstevel@tonic-gate ucred_get(pid_t pid, void *ubuf)
1297c478bd9Sstevel@tonic-gate {
1307c478bd9Sstevel@tonic-gate proc_t *p;
1317c478bd9Sstevel@tonic-gate cred_t *pcr;
1327c478bd9Sstevel@tonic-gate int err;
1337c478bd9Sstevel@tonic-gate struct ucred_s *uc;
134*005d3febSMarek Pospisil uint32_t auditing = AU_AUDITING();
1357c478bd9Sstevel@tonic-gate
1367c478bd9Sstevel@tonic-gate if (pid == P_MYID || pid == curproc->p_pid) {
1377c478bd9Sstevel@tonic-gate pcr = CRED();
1387c478bd9Sstevel@tonic-gate crhold(pcr);
1397c478bd9Sstevel@tonic-gate pid = curproc->p_pid;
1407c478bd9Sstevel@tonic-gate } else {
1417c478bd9Sstevel@tonic-gate cred_t *updcred = NULL;
1427c478bd9Sstevel@tonic-gate
1437c478bd9Sstevel@tonic-gate if (pid < 0)
1447c478bd9Sstevel@tonic-gate return (set_errno(EINVAL));
1457c478bd9Sstevel@tonic-gate
146*005d3febSMarek Pospisil if (auditing)
1477c478bd9Sstevel@tonic-gate updcred = cralloc();
1487c478bd9Sstevel@tonic-gate
1497c478bd9Sstevel@tonic-gate mutex_enter(&pidlock);
1507c478bd9Sstevel@tonic-gate p = prfind(pid);
1517c478bd9Sstevel@tonic-gate
1527c478bd9Sstevel@tonic-gate if (p == NULL) {
1537c478bd9Sstevel@tonic-gate mutex_exit(&pidlock);
1547c478bd9Sstevel@tonic-gate if (updcred != NULL)
1557c478bd9Sstevel@tonic-gate crfree(updcred);
1567c478bd9Sstevel@tonic-gate return (set_errno(ESRCH));
1577c478bd9Sstevel@tonic-gate }
1587c478bd9Sstevel@tonic-gate
1597c478bd9Sstevel@tonic-gate /*
1607c478bd9Sstevel@tonic-gate * Assure that audit data in cred is up-to-date.
1617c478bd9Sstevel@tonic-gate * updcred will be used or freed.
1627c478bd9Sstevel@tonic-gate */
163*005d3febSMarek Pospisil if (auditing)
1647c478bd9Sstevel@tonic-gate audit_update_context(p, updcred);
1657c478bd9Sstevel@tonic-gate
1667c478bd9Sstevel@tonic-gate err = priv_proc_cred_perm(CRED(), p, &pcr, VREAD);
1677c478bd9Sstevel@tonic-gate mutex_exit(&pidlock);
1687c478bd9Sstevel@tonic-gate
1697c478bd9Sstevel@tonic-gate if (err != 0)
1707c478bd9Sstevel@tonic-gate return (set_errno(err));
1717c478bd9Sstevel@tonic-gate }
1727c478bd9Sstevel@tonic-gate
17345916cd2Sjpk uc = cred2ucred(pcr, pid, NULL, CRED());
1747c478bd9Sstevel@tonic-gate
1757c478bd9Sstevel@tonic-gate crfree(pcr);
1767c478bd9Sstevel@tonic-gate
1777c478bd9Sstevel@tonic-gate err = copyout(uc, ubuf, uc->uc_size);
1787c478bd9Sstevel@tonic-gate
1797c478bd9Sstevel@tonic-gate kmem_free(uc, uc->uc_size);
1807c478bd9Sstevel@tonic-gate
1817c478bd9Sstevel@tonic-gate if (err)
1827c478bd9Sstevel@tonic-gate return (set_errno(EFAULT));
1837c478bd9Sstevel@tonic-gate
1847c478bd9Sstevel@tonic-gate return (0);
1857c478bd9Sstevel@tonic-gate }
1867c478bd9Sstevel@tonic-gate
1877c478bd9Sstevel@tonic-gate int
ucredsys(int code,int obj,void * buf)1887c478bd9Sstevel@tonic-gate ucredsys(int code, int obj, void *buf)
1897c478bd9Sstevel@tonic-gate {
1907c478bd9Sstevel@tonic-gate switch (code) {
1917c478bd9Sstevel@tonic-gate case UCREDSYS_UCREDGET:
1927c478bd9Sstevel@tonic-gate return (ucred_get((pid_t)obj, buf));
1937c478bd9Sstevel@tonic-gate case UCREDSYS_GETPEERUCRED:
1947c478bd9Sstevel@tonic-gate return (getpeerucred(obj, buf));
1957c478bd9Sstevel@tonic-gate default:
1967c478bd9Sstevel@tonic-gate return (set_errno(EINVAL));
1977c478bd9Sstevel@tonic-gate }
1987c478bd9Sstevel@tonic-gate }
1997c478bd9Sstevel@tonic-gate
2007c478bd9Sstevel@tonic-gate #ifdef _SYSCALL32_IMPL
2017c478bd9Sstevel@tonic-gate int
ucredsys32(int arg1,int arg2,caddr32_t arg3)2027c478bd9Sstevel@tonic-gate ucredsys32(int arg1, int arg2, caddr32_t arg3)
2037c478bd9Sstevel@tonic-gate {
2047c478bd9Sstevel@tonic-gate return (ucredsys(arg1, arg2, (void *)(uintptr_t)arg3));
2057c478bd9Sstevel@tonic-gate }
2067c478bd9Sstevel@tonic-gate #endif
207