ae77177087
several new kerberos related libraries and applications to FreeBSD:
o kgetcred(1) allows one to manually get a ticket for a particular service.
o kf(1) securily forwards ticket to another host through an authenticated
and encrypted stream.
o kcc(1) is an umbrella program around klist(1), kswitch(1), kgetcred(1)
and other user kerberos operations. klist and kswitch are just symlinks
to kcc(1) now.
o kswitch(1) allows you to easily switch between kerberos credentials if
you're running KCM.
o hxtool(1) is a certificate management tool to use with PKINIT.
o string2key(1) maps a password into key.
o kdigest(8) is a userland tool to access the KDC's digest interface.
o kimpersonate(8) creates a "fake" ticket for a service.
We also now install manpages for some lirbaries that were not installed
before, libheimntlm and libhx509.
- The new HEIMDAL version no longer supports Kerberos 4. All users are
recommended to switch to Kerberos 5.
- Weak ciphers are now disabled by default. To enable DES support (used
by telnet(8)), use "allow_weak_crypto" option in krb5.conf.
- libtelnet, pam_ksu and pam_krb5 are now compiled with error on warnings
disabled due to the function they use (krb5_get_err_text(3)) being
deprecated. I plan to work on this next.
- Heimdal's KDC now require sqlite to operate. We use the bundled version
and install it as libheimsqlite. If some other FreeBSD components will
require it in the future we can rename it to libbsdsqlite and use for these
components as well.
- This is not a latest Heimdal version, the new one was released while I was
working on the update. I will update it to 1.5.2 soon, as it fixes some
important bugs and security issues.
571 lines
13 KiB
C
571 lines
13 KiB
C
/*
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* Copyright (c) 1995 - 2000, 2002, 2004, 2005 Kungliga Tekniska Högskolan
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* (Royal Institute of Technology, Stockholm, Sweden).
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include "kafs_locl.h"
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struct procdata {
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unsigned long param4;
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unsigned long param3;
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unsigned long param2;
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unsigned long param1;
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unsigned long syscall;
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};
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#define VIOC_SYSCALL_PROC _IOW('C', 1, void *)
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struct devdata {
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unsigned long syscall;
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unsigned long param1;
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unsigned long param2;
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unsigned long param3;
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unsigned long param4;
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unsigned long param5;
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unsigned long param6;
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unsigned long retval;
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};
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#ifdef _IOWR
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#define VIOC_SYSCALL_DEV _IOWR('C', 2, struct devdata)
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#define VIOC_SYSCALL_DEV_OPENAFS _IOWR('C', 1, struct devdata)
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#endif
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int _kafs_debug; /* this should be done in a better way */
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#define UNKNOWN_ENTRY_POINT (-1)
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#define NO_ENTRY_POINT 0
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#define SINGLE_ENTRY_POINT 1
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#define MULTIPLE_ENTRY_POINT 2
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#define SINGLE_ENTRY_POINT2 3
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#define SINGLE_ENTRY_POINT3 4
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#define LINUX_PROC_POINT 5
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#define AIX_ENTRY_POINTS 6
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#define MACOS_DEV_POINT 7
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static int afs_entry_point = UNKNOWN_ENTRY_POINT;
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static int afs_syscalls[2];
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static char *afs_ioctlpath;
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static unsigned long afs_ioctlnum;
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/* Magic to get AIX syscalls to work */
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#ifdef _AIX
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static int (*Pioctl)(char*, int, struct ViceIoctl*, int);
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static int (*Setpag)(void);
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#include "dlfcn.h"
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/*
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*
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*/
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static int
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try_aix(void)
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{
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#ifdef STATIC_AFS_SYSCALLS
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Pioctl = aix_pioctl;
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Setpag = aix_setpag;
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#else
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void *ptr;
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char path[MaxPathLen], *p;
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/*
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* If we are root or running setuid don't trust AFSLIBPATH!
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*/
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if (getuid() != 0 && !issuid() && (p = getenv("AFSLIBPATH")) != NULL)
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strlcpy(path, p, sizeof(path));
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else
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snprintf(path, sizeof(path), "%s/afslib.so", LIBDIR);
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ptr = dlopen(path, RTLD_NOW);
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if(ptr == NULL) {
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if(_kafs_debug) {
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if(errno == ENOEXEC && (p = dlerror()) != NULL)
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fprintf(stderr, "dlopen(%s): %s\n", path, p);
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else if (errno != ENOENT)
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fprintf(stderr, "dlopen(%s): %s\n", path, strerror(errno));
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}
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return 1;
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}
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Setpag = (int (*)(void))dlsym(ptr, "aix_setpag");
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Pioctl = (int (*)(char*, int,
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struct ViceIoctl*, int))dlsym(ptr, "aix_pioctl");
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#endif
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afs_entry_point = AIX_ENTRY_POINTS;
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return 0;
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}
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#endif /* _AIX */
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/*
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* This probably only works under Solaris and could get confused if
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* there's a /etc/name_to_sysnum file.
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*/
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#if defined(AFS_SYSCALL) || defined(AFS_SYSCALL2) || defined(AFS_SYSCALL3)
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#define _PATH_ETC_NAME_TO_SYSNUM "/etc/name_to_sysnum"
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static int
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map_syscall_name_to_number (const char *str, int *res)
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{
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FILE *f;
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char buf[256];
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size_t str_len = strlen (str);
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f = fopen (_PATH_ETC_NAME_TO_SYSNUM, "r");
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if (f == NULL)
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return -1;
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while (fgets (buf, sizeof(buf), f) != NULL) {
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if (buf[0] == '#')
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continue;
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if (strncmp (str, buf, str_len) == 0) {
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char *begptr = buf + str_len;
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char *endptr;
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long val = strtol (begptr, &endptr, 0);
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if (val != 0 && endptr != begptr) {
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fclose (f);
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*res = val;
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return 0;
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}
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}
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}
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fclose (f);
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return -1;
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}
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#endif
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static int
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try_ioctlpath(const char *path, unsigned long ioctlnum, int entrypoint)
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{
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int fd, ret, saved_errno;
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fd = open(path, O_RDWR);
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if (fd < 0)
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return 1;
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switch (entrypoint) {
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case LINUX_PROC_POINT: {
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struct procdata data = { 0, 0, 0, 0, AFSCALL_PIOCTL };
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data.param2 = (unsigned long)VIOCGETTOK;
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ret = ioctl(fd, ioctlnum, &data);
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break;
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}
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case MACOS_DEV_POINT: {
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struct devdata data = { AFSCALL_PIOCTL, 0, 0, 0, 0, 0, 0, 0 };
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data.param2 = (unsigned long)VIOCGETTOK;
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ret = ioctl(fd, ioctlnum, &data);
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break;
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}
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default:
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abort();
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}
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saved_errno = errno;
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close(fd);
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/*
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* Be quite liberal in what error are ok, the first is the one
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* that should trigger given that params is NULL.
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*/
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if (ret &&
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(saved_errno != EFAULT &&
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saved_errno != EDOM &&
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saved_errno != ENOTCONN))
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return 1;
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afs_ioctlnum = ioctlnum;
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afs_ioctlpath = strdup(path);
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if (afs_ioctlpath == NULL)
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return 1;
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afs_entry_point = entrypoint;
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return 0;
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}
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static int
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do_ioctl(void *data)
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{
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int fd, ret, saved_errno;
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fd = open(afs_ioctlpath, O_RDWR);
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if (fd < 0) {
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errno = EINVAL;
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return -1;
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}
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ret = ioctl(fd, afs_ioctlnum, data);
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saved_errno = errno;
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close(fd);
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errno = saved_errno;
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return ret;
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}
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int
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k_pioctl(char *a_path,
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int o_opcode,
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struct ViceIoctl *a_paramsP,
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int a_followSymlinks)
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{
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#ifndef NO_AFS
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switch(afs_entry_point){
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#if defined(AFS_SYSCALL) || defined(AFS_SYSCALL2) || defined(AFS_SYSCALL3)
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case SINGLE_ENTRY_POINT:
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case SINGLE_ENTRY_POINT2:
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case SINGLE_ENTRY_POINT3:
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return syscall(afs_syscalls[0], AFSCALL_PIOCTL,
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a_path, o_opcode, a_paramsP, a_followSymlinks);
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#endif
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#if defined(AFS_PIOCTL)
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case MULTIPLE_ENTRY_POINT:
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return syscall(afs_syscalls[0],
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a_path, o_opcode, a_paramsP, a_followSymlinks);
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#endif
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case LINUX_PROC_POINT: {
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struct procdata data = { 0, 0, 0, 0, AFSCALL_PIOCTL };
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data.param1 = (unsigned long)a_path;
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data.param2 = (unsigned long)o_opcode;
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data.param3 = (unsigned long)a_paramsP;
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data.param4 = (unsigned long)a_followSymlinks;
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return do_ioctl(&data);
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}
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case MACOS_DEV_POINT: {
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struct devdata data = { AFSCALL_PIOCTL, 0, 0, 0, 0, 0, 0, 0 };
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int ret;
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data.param1 = (unsigned long)a_path;
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data.param2 = (unsigned long)o_opcode;
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data.param3 = (unsigned long)a_paramsP;
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data.param4 = (unsigned long)a_followSymlinks;
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ret = do_ioctl(&data);
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if (ret)
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return ret;
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return data.retval;
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}
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#ifdef _AIX
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case AIX_ENTRY_POINTS:
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return Pioctl(a_path, o_opcode, a_paramsP, a_followSymlinks);
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#endif
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}
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errno = ENOSYS;
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#ifdef SIGSYS
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kill(getpid(), SIGSYS); /* You lose! */
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#endif
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#endif /* NO_AFS */
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return -1;
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}
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int
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k_afs_cell_of_file(const char *path, char *cell, int len)
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{
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struct ViceIoctl parms;
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parms.in = NULL;
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parms.in_size = 0;
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parms.out = cell;
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parms.out_size = len;
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return k_pioctl(rk_UNCONST(path), VIOC_FILE_CELL_NAME, &parms, 1);
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}
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int
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k_unlog(void)
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{
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struct ViceIoctl parms;
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memset(&parms, 0, sizeof(parms));
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return k_pioctl(0, VIOCUNLOG, &parms, 0);
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}
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int
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k_setpag(void)
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{
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#ifndef NO_AFS
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switch(afs_entry_point){
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#if defined(AFS_SYSCALL) || defined(AFS_SYSCALL2) || defined(AFS_SYSCALL3)
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case SINGLE_ENTRY_POINT:
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case SINGLE_ENTRY_POINT2:
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case SINGLE_ENTRY_POINT3:
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return syscall(afs_syscalls[0], AFSCALL_SETPAG);
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#endif
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#if defined(AFS_PIOCTL)
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case MULTIPLE_ENTRY_POINT:
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return syscall(afs_syscalls[1]);
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#endif
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case LINUX_PROC_POINT: {
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struct procdata data = { 0, 0, 0, 0, AFSCALL_SETPAG };
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return do_ioctl(&data);
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}
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case MACOS_DEV_POINT: {
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struct devdata data = { AFSCALL_SETPAG, 0, 0, 0, 0, 0, 0, 0 };
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int ret = do_ioctl(&data);
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if (ret)
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return ret;
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return data.retval;
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}
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#ifdef _AIX
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case AIX_ENTRY_POINTS:
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return Setpag();
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#endif
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}
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errno = ENOSYS;
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#ifdef SIGSYS
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kill(getpid(), SIGSYS); /* You lose! */
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#endif
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#endif /* NO_AFS */
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return -1;
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}
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static jmp_buf catch_SIGSYS;
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#ifdef SIGSYS
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static RETSIGTYPE
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SIGSYS_handler(int sig)
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{
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errno = 0;
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signal(SIGSYS, SIGSYS_handler); /* Need to reinstall handler on SYSV */
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longjmp(catch_SIGSYS, 1);
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}
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#endif
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/*
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* Try to see if `syscall' is a pioctl. Return 0 iff succesful.
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*/
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#if defined(AFS_SYSCALL) || defined(AFS_SYSCALL2) || defined(AFS_SYSCALL3)
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static int
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try_one (int syscall_num)
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{
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struct ViceIoctl parms;
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memset(&parms, 0, sizeof(parms));
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|
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if (setjmp(catch_SIGSYS) == 0) {
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syscall(syscall_num, AFSCALL_PIOCTL,
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0, VIOCSETTOK, &parms, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0);
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if (errno == EINVAL) {
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afs_entry_point = SINGLE_ENTRY_POINT;
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afs_syscalls[0] = syscall_num;
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return 0;
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}
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|
}
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return 1;
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}
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#endif
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/*
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|
* Try to see if `syscall_pioctl' is a pioctl syscall. Return 0 iff
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* succesful.
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*
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*/
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#ifdef AFS_PIOCTL
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static int
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try_two (int syscall_pioctl, int syscall_setpag)
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{
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struct ViceIoctl parms;
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memset(&parms, 0, sizeof(parms));
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if (setjmp(catch_SIGSYS) == 0) {
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syscall(syscall_pioctl,
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0, VIOCSETTOK, &parms, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0);
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if (errno == EINVAL) {
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afs_entry_point = MULTIPLE_ENTRY_POINT;
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afs_syscalls[0] = syscall_pioctl;
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|
afs_syscalls[1] = syscall_setpag;
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|
return 0;
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|
}
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|
}
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|
return 1;
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|
}
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|
#endif
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int
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|
k_hasafs(void)
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|
{
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|
#if !defined(NO_AFS) && defined(SIGSYS)
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|
RETSIGTYPE (*saved_func)(int);
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|
#endif
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|
int saved_errno, ret;
|
|
char *env = NULL;
|
|
|
|
if (!issuid())
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|
env = getenv ("AFS_SYSCALL");
|
|
|
|
/*
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|
* Already checked presence of AFS syscalls?
|
|
*/
|
|
if (afs_entry_point != UNKNOWN_ENTRY_POINT)
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|
return afs_entry_point != NO_ENTRY_POINT;
|
|
|
|
/*
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|
* Probe kernel for AFS specific syscalls,
|
|
* they (currently) come in two flavors.
|
|
* If the syscall is absent we recive a SIGSYS.
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|
*/
|
|
afs_entry_point = NO_ENTRY_POINT;
|
|
|
|
saved_errno = errno;
|
|
#ifndef NO_AFS
|
|
#ifdef SIGSYS
|
|
saved_func = signal(SIGSYS, SIGSYS_handler);
|
|
#endif
|
|
if (env && strstr(env, "..") == NULL) {
|
|
|
|
if (strncmp("/proc/", env, 6) == 0) {
|
|
if (try_ioctlpath(env, VIOC_SYSCALL_PROC, LINUX_PROC_POINT) == 0)
|
|
goto done;
|
|
}
|
|
if (strncmp("/dev/", env, 5) == 0) {
|
|
#ifdef VIOC_SYSCALL_DEV
|
|
if (try_ioctlpath(env, VIOC_SYSCALL_DEV, MACOS_DEV_POINT) == 0)
|
|
goto done;
|
|
#endif
|
|
#ifdef VIOC_SYSCALL_DEV_OPENAFS
|
|
if (try_ioctlpath(env,VIOC_SYSCALL_DEV_OPENAFS,MACOS_DEV_POINT) ==0)
|
|
goto done;
|
|
#endif
|
|
}
|
|
}
|
|
|
|
ret = try_ioctlpath("/proc/fs/openafs/afs_ioctl",
|
|
VIOC_SYSCALL_PROC, LINUX_PROC_POINT);
|
|
if (ret == 0)
|
|
goto done;
|
|
ret = try_ioctlpath("/proc/fs/nnpfs/afs_ioctl",
|
|
VIOC_SYSCALL_PROC, LINUX_PROC_POINT);
|
|
if (ret == 0)
|
|
goto done;
|
|
|
|
#ifdef VIOC_SYSCALL_DEV_OPENAFS
|
|
ret = try_ioctlpath("/dev/openafs_ioctl",
|
|
VIOC_SYSCALL_DEV_OPENAFS, MACOS_DEV_POINT);
|
|
if (ret == 0)
|
|
goto done;
|
|
#endif
|
|
#ifdef VIOC_SYSCALL_DEV
|
|
ret = try_ioctlpath("/dev/nnpfs_ioctl", VIOC_SYSCALL_DEV, MACOS_DEV_POINT);
|
|
if (ret == 0)
|
|
goto done;
|
|
#endif
|
|
|
|
#if defined(AFS_SYSCALL) || defined(AFS_SYSCALL2) || defined(AFS_SYSCALL3)
|
|
{
|
|
int tmp;
|
|
|
|
if (env != NULL) {
|
|
if (sscanf (env, "%d", &tmp) == 1) {
|
|
if (try_one (tmp) == 0)
|
|
goto done;
|
|
} else {
|
|
char *end = NULL;
|
|
char *p;
|
|
char *s = strdup (env);
|
|
|
|
if (s != NULL) {
|
|
for (p = strtok_r (s, ",", &end);
|
|
p != NULL;
|
|
p = strtok_r (NULL, ",", &end)) {
|
|
if (map_syscall_name_to_number (p, &tmp) == 0)
|
|
if (try_one (tmp) == 0) {
|
|
free (s);
|
|
goto done;
|
|
}
|
|
}
|
|
free (s);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
#endif /* AFS_SYSCALL || AFS_SYSCALL2 || AFS_SYSCALL3 */
|
|
|
|
#ifdef AFS_SYSCALL
|
|
if (try_one (AFS_SYSCALL) == 0)
|
|
goto done;
|
|
#endif /* AFS_SYSCALL */
|
|
|
|
#ifdef AFS_PIOCTL
|
|
{
|
|
int tmp[2];
|
|
|
|
if (env != NULL && sscanf (env, "%d%d", &tmp[0], &tmp[1]) == 2)
|
|
if (try_two (tmp[0], tmp[1]) == 2)
|
|
goto done;
|
|
}
|
|
#endif /* AFS_PIOCTL */
|
|
|
|
#ifdef AFS_PIOCTL
|
|
if (try_two (AFS_PIOCTL, AFS_SETPAG) == 0)
|
|
goto done;
|
|
#endif /* AFS_PIOCTL */
|
|
|
|
#ifdef AFS_SYSCALL2
|
|
if (try_one (AFS_SYSCALL2) == 0)
|
|
goto done;
|
|
#endif /* AFS_SYSCALL2 */
|
|
|
|
#ifdef AFS_SYSCALL3
|
|
if (try_one (AFS_SYSCALL3) == 0)
|
|
goto done;
|
|
#endif /* AFS_SYSCALL3 */
|
|
|
|
#ifdef _AIX
|
|
#if 0
|
|
if (env != NULL) {
|
|
char *pos = NULL;
|
|
char *pioctl_name;
|
|
char *setpag_name;
|
|
|
|
pioctl_name = strtok_r (env, ", \t", &pos);
|
|
if (pioctl_name != NULL) {
|
|
setpag_name = strtok_r (NULL, ", \t", &pos);
|
|
if (setpag_name != NULL)
|
|
if (try_aix (pioctl_name, setpag_name) == 0)
|
|
goto done;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
if(try_aix() == 0)
|
|
goto done;
|
|
#endif
|
|
|
|
|
|
done:
|
|
#ifdef SIGSYS
|
|
signal(SIGSYS, saved_func);
|
|
#endif
|
|
#endif /* NO_AFS */
|
|
errno = saved_errno;
|
|
return afs_entry_point != NO_ENTRY_POINT;
|
|
}
|
|
|
|
int
|
|
k_hasafs_recheck(void)
|
|
{
|
|
afs_entry_point = UNKNOWN_ENTRY_POINT;
|
|
return k_hasafs();
|
|
}
|