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authorstas <stas@FreeBSD.org>2012-03-22 08:48:42 +0000
committerstas <stas@FreeBSD.org>2012-03-22 08:48:42 +0000
commite7e0b349883e80d63c4e856f16351aaa6607766d (patch)
tree5518cb944fa25f627a797b58451ccf506b720fcf /crypto/heimdal/appl/rsh/rshd.c
parente02fd6b8423e63f1fdbfc1f984d7c7291a1bacd1 (diff)
parent2db247d3fc10ef5304f61dbd66448efff8cc6684 (diff)
downloadFreeBSD-src-e7e0b349883e80d63c4e856f16351aaa6607766d.zip
FreeBSD-src-e7e0b349883e80d63c4e856f16351aaa6607766d.tar.gz
- Update FreeBSD Heimdal distribution to version 1.5.1. This also brings
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.
Diffstat (limited to 'crypto/heimdal/appl/rsh/rshd.c')
-rw-r--r--crypto/heimdal/appl/rsh/rshd.c250
1 files changed, 83 insertions, 167 deletions
diff --git a/crypto/heimdal/appl/rsh/rshd.c b/crypto/heimdal/appl/rsh/rshd.c
index 852327a..1958f2d 100644
--- a/crypto/heimdal/appl/rsh/rshd.c
+++ b/crypto/heimdal/appl/rsh/rshd.c
@@ -1,39 +1,39 @@
/*
- * Copyright (c) 1997-2007 Kungliga Tekniska Högskolan
- * (Royal Institute of Technology, Stockholm, Sweden).
- * All rights reserved.
+ * Copyright (c) 1997-2007 Kungliga Tekniska Högskolan
+ * (Royal Institute of Technology, Stockholm, Sweden).
+ * All rights reserved.
*
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
+ * 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.
+ * 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.
+ * 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.
*
- * 3. Neither the name of the Institute nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
+ * 3. Neither the name of the Institute nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
*
- * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``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 INSTITUTE OR CONTRIBUTORS 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.
+ * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``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 INSTITUTE OR CONTRIBUTORS 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 "rsh_locl.h"
#include "login_locl.h"
-RCSID("$Id: rshd.c 21515 2007-07-12 12:47:07Z lha $");
+RCSID("$Id$");
int
login_access( struct passwd *user, char *from);
@@ -52,11 +52,6 @@ krb5_keyblock *keyblock;
krb5_crypto crypto;
#endif
-#ifdef KRB4
-des_key_schedule schedule;
-des_cblock iv;
-#endif
-
#ifdef KRB5
krb5_ccache ccache, ccache2;
int kerberos_status = 0;
@@ -71,7 +66,6 @@ static int do_inetd = 1;
static char *port_str;
static int do_rhosts = 1;
static int do_kerberos = 0;
-#define DO_KRB4 2
#define DO_KRB5 4
static int do_vacuous = 0;
static int do_log = 1;
@@ -113,7 +107,7 @@ fatal (int sock, const char *what, const char *m, ...)
len = min(len, sizeof(buf) - 1);
va_end(args);
if(what != NULL)
- syslog (LOG_ERR, "%s: %m: %s", what, buf + 1);
+ syslog (LOG_ERR, "%s: %s: %s", what, strerror(errno), buf + 1);
else
syslog (LOG_ERR, "%s", buf + 1);
net_write (sock, buf, len + 1);
@@ -129,7 +123,7 @@ read_str (int s, size_t sz, char *expl)
fatal(s, NULL, "%s too long", expl);
while(p < str + sz) {
if(net_read(s, p, 1) != 1)
- syslog_and_die("read: %m");
+ syslog_and_die("read: %s", strerror(errno));
if(*p == '\0')
return str;
p++;
@@ -146,7 +140,7 @@ recv_bsd_auth (int s, u_char *buf,
char **cmd)
{
struct passwd *pwd;
-
+
*client_username = read_str (s, USERNAME_SZ, "local username");
*server_username = read_str (s, USERNAME_SZ, "remote username");
*cmd = read_str (s, ARG_MAX + 1, "command");
@@ -159,72 +153,8 @@ recv_bsd_auth (int s, u_char *buf,
return 0;
}
-#ifdef KRB4
-static int
-recv_krb4_auth (int s, u_char *buf,
- struct sockaddr *thisaddr,
- struct sockaddr *thataddr,
- char **client_username,
- char **server_username,
- char **cmd)
-{
- int status;
- int32_t options;
- KTEXT_ST ticket;
- AUTH_DAT auth;
- char instance[INST_SZ + 1];
- char version[KRB_SENDAUTH_VLEN + 1];
-
- if (memcmp (buf, KRB_SENDAUTH_VERS, 4) != 0)
- return -1;
- if (net_read (s, buf + 4, KRB_SENDAUTH_VLEN - 4) !=
- KRB_SENDAUTH_VLEN - 4)
- syslog_and_die ("reading auth info: %m");
- if (memcmp (buf, KRB_SENDAUTH_VERS, KRB_SENDAUTH_VLEN) != 0)
- syslog_and_die("unrecognized auth protocol: %.8s", buf);
-
- options = KOPT_IGNORE_PROTOCOL;
- if (do_encrypt)
- options |= KOPT_DO_MUTUAL;
- k_getsockinst (s, instance, sizeof(instance));
- status = krb_recvauth (options,
- s,
- &ticket,
- "rcmd",
- instance,
- (struct sockaddr_in *)thataddr,
- (struct sockaddr_in *)thisaddr,
- &auth,
- "",
- schedule,
- version);
- if (status != KSUCCESS)
- syslog_and_die ("recvauth: %s", krb_get_err_text(status));
- if (strncmp (version, KCMD_OLD_VERSION, KRB_SENDAUTH_VLEN) != 0)
- syslog_and_die ("bad version: %s", version);
-
- *server_username = read_str (s, USERNAME_SZ, "remote username");
- if (kuserok (&auth, *server_username) != 0)
- fatal (s, NULL, "Permission denied.");
- *cmd = read_str (s, ARG_MAX + 1, "command");
-
- syslog(LOG_INFO|LOG_AUTH,
- "kerberos v4 shell from %s on %s as %s, cmd '%.80s'",
- krb_unparse_name_long(auth.pname, auth.pinst, auth.prealm),
-
- inet_ntoa(((struct sockaddr_in *)thataddr)->sin_addr),
- *server_username,
- *cmd);
-
- memcpy (iv, auth.session, sizeof(iv));
-
- return 0;
-}
-
-#endif /* KRB4 */
-
#ifdef KRB5
-static int
+static int
save_krb5_creds (int s,
krb5_auth_context auth_context,
krb5_principal client)
@@ -232,7 +162,7 @@ save_krb5_creds (int s,
{
int ret;
krb5_data remote_cred;
-
+
krb5_data_zero (&remote_cred);
ret= krb5_read_message (context, (void *)&s, &remote_cred);
if (ret) {
@@ -241,13 +171,13 @@ save_krb5_creds (int s,
}
if (remote_cred.length == 0)
return 0;
-
- ret = krb5_cc_gen_new(context, &krb5_mcc_ops, &ccache);
+
+ ret = krb5_cc_new_unique(context, krb5_cc_type_memory, NULL, &ccache);
if (ret) {
krb5_data_free(&remote_cred);
return 0;
}
-
+
krb5_cc_initialize(context,ccache,client);
ret = krb5_rd_cred2(context, auth_context, ccache, &remote_cred);
if(ret != 0)
@@ -268,8 +198,8 @@ krb5_start_session (void)
ret = krb5_cc_resolve (context, tkfile, &ccache2);
if (ret) {
estr = krb5_get_error_string(context);
- syslog(LOG_WARNING, "resolve cred cache %s: %s",
- tkfile,
+ syslog(LOG_WARNING, "resolve cred cache %s: %s",
+ tkfile,
estr ? estr : krb5_get_err_text(context, ret));
free(estr);
krb5_cc_destroy(context, ccache);
@@ -279,7 +209,7 @@ krb5_start_session (void)
ret = krb5_cc_copy_cache (context, ccache, ccache2);
if (ret) {
estr = krb5_get_error_string(context);
- syslog(LOG_WARNING, "storing credentials: %s",
+ syslog(LOG_WARNING, "storing credentials: %s",
estr ? estr : krb5_get_err_text(context, ret));
free(estr);
krb5_cc_destroy(context, ccache);
@@ -328,13 +258,13 @@ recv_krb5_auth (int s, u_char *buf,
if (memcmp (buf, "\x00\x00\x00\x13", 4) != 0)
return -1;
len = (buf[0] << 24) | (buf[1] << 16) | (buf[2] << 8) | (buf[3]);
-
+
if (net_read(s, buf, len) != len)
- syslog_and_die ("reading auth info: %m");
+ syslog_and_die ("reading auth info: %s", strerror(errno));
if (len != sizeof(KRB5_SENDAUTH_VERSION)
|| memcmp (buf, KRB5_SENDAUTH_VERSION, len) != 0)
syslog_and_die ("bad sendauth version: %.8s", buf);
-
+
status = krb5_sock_to_principal (context,
s,
"host",
@@ -363,7 +293,7 @@ recv_krb5_auth (int s, u_char *buf,
*client_username = read_str (s, ARG_MAX + 1, "local username");
if(protocol_version == 2) {
- status = krb5_auth_con_getremotesubkey(context, auth_context,
+ status = krb5_auth_con_getremotesubkey(context, auth_context,
&keyblock);
if(status != 0 || keyblock == NULL)
syslog_and_die("failed to get remote subkey");
@@ -378,10 +308,10 @@ recv_krb5_auth (int s, u_char *buf,
status = krb5_crypto_init(context, keyblock, 0, &crypto);
if(status)
- syslog_and_die("krb5_crypto_init: %s",
+ syslog_and_die("krb5_crypto_init: %s",
krb5_get_err_text(context, status));
-
+
cksum_data.length = asprintf (&str,
"%u:%s%s",
ntohs(socket_get_port (thisaddr)),
@@ -391,9 +321,9 @@ recv_krb5_auth (int s, u_char *buf,
syslog_and_die ("asprintf: out of memory");
cksum_data.data = str;
- status = krb5_verify_authenticator_checksum(context,
+ status = krb5_verify_authenticator_checksum(context,
auth_context,
- cksum_data.data,
+ cksum_data.data,
cksum_data.length);
if (status)
@@ -464,7 +394,9 @@ recv_krb5_auth (int s, u_char *buf,
*cmd);
free (name);
}
- }
+ }
+
+ krb5_auth_con_free(context, auth_context);
return 0;
}
@@ -508,12 +440,12 @@ rshd_loop (int from0, int to0,
if (errno == EINTR)
continue;
else
- syslog_and_die ("select: %m");
+ syslog_and_die ("select: %s", strerror(errno));
}
if (FD_ISSET(from0, &readset)) {
ret = do_read (from0, buf, RSHD_BUFSIZ, ivec_in[0]);
if (ret < 0)
- syslog_and_die ("read: %m");
+ syslog_and_die ("read: %s", strerror(errno));
else if (ret == 0) {
close (from0);
close (to0);
@@ -524,7 +456,7 @@ rshd_loop (int from0, int to0,
if (FD_ISSET(from1, &readset)) {
ret = read (from1, buf, RSH_BUFSIZ);
if (ret < 0)
- syslog_and_die ("read: %m");
+ syslog_and_die ("read: %s", strerror(errno));
else if (ret == 0) {
close (from1);
close (to1);
@@ -537,7 +469,7 @@ rshd_loop (int from0, int to0,
if (FD_ISSET(from2, &readset)) {
ret = read (from2, buf, RSH_BUFSIZ);
if (ret < 0)
- syslog_and_die ("read: %m");
+ syslog_and_die ("read: %s", strerror(errno));
else if (ret == 0) {
close (from2);
close (to2);
@@ -683,10 +615,10 @@ doit (void)
thisaddr_len = sizeof(thisaddr_ss);
if (getsockname (s, thisaddr, &thisaddr_len) < 0)
- syslog_and_die("getsockname: %m");
+ syslog_and_die("getsockname: %s", strerror(errno));
thataddr_len = sizeof(thataddr_ss);
if (getpeername (s, thataddr, &thataddr_len) < 0)
- syslog_and_die ("getpeername: %m");
+ syslog_and_die ("getpeername: %s", strerror(errno));
/* check for V4MAPPED addresses? */
@@ -697,7 +629,7 @@ doit (void)
port = 0;
for(;;) {
if (net_read (s, p, 1) != 1)
- syslog_and_die ("reading port number: %m");
+ syslog_and_die ("reading port number: %s", strerror(errno));
if (*p == '\0')
break;
else if (isdigit(*p))
@@ -712,7 +644,7 @@ doit (void)
if (port) {
int priv_port = IPPORT_RESERVED - 1;
- /*
+ /*
* There's no reason to require a ``privileged'' port number
* here, but for some reason the brain dead rsh clients
* do... :-(
@@ -732,28 +664,19 @@ doit (void)
else
errsock = socket (erraddr->sa_family, SOCK_STREAM, 0);
if (errsock < 0)
- syslog_and_die ("socket: %m");
+ syslog_and_die ("socket: %s", strerror(errno));
if (connect (errsock,
erraddr,
socket_sockaddr_size (erraddr)) < 0) {
- syslog (LOG_WARNING, "connect: %m");
+ syslog (LOG_WARNING, "connect: %s", strerror(errno));
close (errsock);
}
}
-
+
if(do_kerberos) {
if (net_read (s, buf, 4) != 4)
- syslog_and_die ("reading auth info: %m");
-
-#ifdef KRB4
- if ((do_kerberos & DO_KRB4) &&
- recv_krb4_auth (s, buf, thisaddr, thataddr,
- &client_user,
- &server_user,
- &cmd) == 0)
- auth_method = AUTH_KRB4;
- else
-#endif /* KRB4 */
+ syslog_and_die ("reading auth info: %s", strerror(errno));
+
#ifdef KRB5
if((do_kerberos & DO_KRB5) &&
recv_krb5_auth (s, buf, thisaddr, thataddr,
@@ -811,26 +734,26 @@ doit (void)
{
struct spwd *sp;
long today;
-
+
sp = getspnam(server_user);
if (sp != NULL) {
today = time(0)/(24L * 60 * 60);
- if (sp->sp_expire > 0)
- if (today > sp->sp_expire)
+ if (sp->sp_expire > 0)
+ if (today > sp->sp_expire)
fatal(s, NULL, "Account has expired.");
}
}
#endif
-
+
#ifdef HAVE_SETLOGIN
if (setlogin(pwd->pw_name) < 0)
- syslog(LOG_ERR, "setlogin() failed: %m");
+ syslog(LOG_ERR, "setlogin() failed: %s", strerror(errno));
#endif
#ifdef HAVE_SETPCRED
if (setpcred (pwd->pw_name, NULL) == -1)
- syslog(LOG_ERR, "setpcred() failure: %m");
+ syslog(LOG_ERR, "setpcred() failure: %s", strerror(errno));
#endif /* HAVE_SETPCRED */
/* Apply limits if not root */
@@ -863,7 +786,7 @@ doit (void)
#ifdef KRB5
{
int fd;
-
+
if (!do_unique_tkfile)
snprintf(tkfile,sizeof(tkfile),"FILE:/tmp/krb5cc_%lu",
(unsigned long)pwd->pw_uid);
@@ -873,7 +796,7 @@ doit (void)
close(fd);
unlink(tkfile+5);
}
-
+
if (kerberos_status)
krb5_start_session();
}
@@ -888,19 +811,13 @@ doit (void)
fatal (s, "net_write", "write failed");
}
-#if defined(KRB4) || defined(KRB5)
+#if defined(KRB5)
if(k_hasafs()) {
char cell[64];
if(do_newpag)
k_setpag();
-#ifdef KRB4
- if (k_afs_cell_of_file (pwd->pw_dir, cell, sizeof(cell)) == 0)
- krb_afslog_uid_home (cell, NULL, pwd->pw_uid, pwd->pw_dir);
- krb_afslog_uid_home(NULL, NULL, pwd->pw_uid, pwd->pw_dir);
-#endif
-#ifdef KRB5
/* XXX */
if (kerberos_status) {
krb5_ccache ccache;
@@ -916,9 +833,8 @@ doit (void)
krb5_cc_close (context, ccache);
}
}
-#endif /* KRB5 */
}
-#endif /* KRB5 || KRB4 */
+#endif /* KRB5 */
execle (pwd->pw_shell, pwd->pw_shell, "-c", cmd, NULL, env);
err(1, "exec %s", pwd->pw_shell);
}
@@ -928,7 +844,7 @@ struct getargs args[] = {
{ "keepalive", 'n', arg_negative_flag, &do_keepalive },
{ "inetd", 'i', arg_negative_flag, &do_inetd,
"Not started from inetd" },
-#if defined(KRB4) || defined(KRB5)
+#if defined(KRB5)
{ "kerberos", 'k', arg_flag, &do_kerberos,
"Implement kerberised services" },
{ "encrypt", 'x', arg_flag, &do_encrypt,
@@ -940,7 +856,7 @@ struct getargs args[] = {
"port" },
{ "vacuous", 'v', arg_flag, &do_vacuous,
"Don't accept non-kerberised connections" },
-#if defined(KRB4) || defined(KRB5)
+#if defined(KRB5)
{ NULL, 'P', arg_negative_flag, &do_newpag,
"Don't put process in new PAG" },
#endif
@@ -985,12 +901,12 @@ main(int argc, char **argv)
exit(0);
}
-#if defined(KRB4) || defined(KRB5)
+#if defined(KRB5)
if (do_encrypt)
do_kerberos = 1;
if(do_kerberos)
- do_kerberos = DO_KRB4 | DO_KRB5;
+ do_kerberos = DO_KRB5;
#endif
#ifdef KRB5
@@ -1002,19 +918,19 @@ main(int argc, char **argv)
int error;
struct addrinfo *ai = NULL, hints;
char portstr[NI_MAXSERV];
-
+
memset (&hints, 0, sizeof(hints));
hints.ai_flags = AI_PASSIVE;
hints.ai_socktype = SOCK_STREAM;
hints.ai_family = PF_UNSPEC;
-
+
if(port_str != NULL) {
error = getaddrinfo (NULL, port_str, &hints, &ai);
if (error)
errx (1, "getaddrinfo: %s", gai_strerror (error));
}
if (ai == NULL) {
-#if defined(KRB4) || defined(KRB5)
+#if defined(KRB5)
if (do_kerberos) {
if (do_encrypt) {
error = getaddrinfo(NULL, "ekshell", &hints, &ai);
@@ -1022,7 +938,7 @@ main(int argc, char **argv)
snprintf(portstr, sizeof(portstr), "%d", 545);
error = getaddrinfo(NULL, portstr, &hints, &ai);
}
- if(error)
+ if(error)
errx (1, "getaddrinfo: %s", gai_strerror (error));
} else {
error = getaddrinfo(NULL, "kshell", &hints, &ai);
@@ -1030,7 +946,7 @@ main(int argc, char **argv)
snprintf(portstr, sizeof(portstr), "%d", 544);
error = getaddrinfo(NULL, portstr, &hints, &ai);
}
- if(error)
+ if(error)
errx (1, "getaddrinfo: %s", gai_strerror (error));
}
} else
@@ -1041,18 +957,18 @@ main(int argc, char **argv)
snprintf(portstr, sizeof(portstr), "%d", 514);
error = getaddrinfo(NULL, portstr, &hints, &ai);
}
- if(error)
+ if(error)
errx (1, "getaddrinfo: %s", gai_strerror (error));
}
}
- mini_inetd_addrinfo (ai);
+ mini_inetd_addrinfo (ai, NULL);
freeaddrinfo(ai);
}
if (do_keepalive &&
setsockopt(0, SOL_SOCKET, SO_KEEPALIVE, (char *)&on,
sizeof(on)) < 0)
- syslog(LOG_WARNING, "setsockopt (SO_KEEPALIVE): %m");
+ syslog(LOG_WARNING, "setsockopt (SO_KEEPALIVE): %s", strerror(errno));
/* set SO_LINGER? */
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