Initial import of KTH eBones. This has been cleaned up to only include

the "core" Kerberos functionality. The rest of the userland will get their
own changes later.

1 files changed, 184 insertions, 0 deletions

diff --git a/crypto/kerberosIV/appl/bsd/klogin.c b/crypto/kerberosIV/appl/bsd/klogin.c
new file mode 100644
index 0000000..321da64
--- /dev/null
+++ b/crypto/kerberosIV/appl/bsd/klogin.c
@@ -0,0 +1,184 @@
+/*-
+ * Copyright (c) 1990, 1993, 1994
+ *	The Regents of the University of California.  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.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University 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 REGENTS 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 REGENTS 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 "bsd_locl.h"
+
+RCSID("$Id: klogin.c,v 1.20 1997/05/02 14:27:42 assar Exp $");
+
+#ifdef KERBEROS
+
+#define	VERIFY_SERVICE	"rcmd"
+
+extern int notickets;
+extern char *krbtkfile_env;
+
+static char tkt_location[MaxPathLen];
+
+/*
+ * Attempt to log the user in using Kerberos authentication
+ *
+ * return 0 on success (will be logged in)
+ *	  1 if Kerberos failed (try local password in login)
+ */
+int
+klogin(struct passwd *pw, char *instance, char *localhost, char *password)
+{
+    int kerror;
+    AUTH_DAT authdata;
+    KTEXT_ST ticket;
+    struct hostent *hp;
+    u_int32_t faddr;
+    char realm[REALM_SZ], savehost[MaxHostNameLen];
+    extern int noticketsdontcomplain;
+
+#ifdef KLOGIN_PARANOID
+    noticketsdontcomplain = 0; /* enable warning message */
+#endif
+    /*
+     * Root logins don't use Kerberos.
+     * If we have a realm, try getting a ticket-granting ticket
+     * and using it to authenticate.  Otherwise, return
+     * failure so that we can try the normal passwd file
+     * for a password.  If that's ok, log the user in
+     * without issuing any tickets.
+     */
+    if (strcmp(pw->pw_name, "root") == 0 ||
+	krb_get_lrealm(realm, 0) != KSUCCESS)
+	return (1);
+
+    noticketsdontcomplain = 0; /* enable warning message */
+
+    /*
+     * get TGT for local realm
+     * tickets are stored in a file named TKT_ROOT plus uid
+     * except for user.root tickets.
+     */
+
+    if (strcmp(instance, "root") != 0)
+	snprintf(tkt_location, sizeof(tkt_location),
+		 "%s%u_%u",
+		TKT_ROOT, (unsigned)pw->pw_uid, (unsigned)getpid());
+    else {
+	snprintf(tkt_location, sizeof(tkt_location),
+		 "%s_root_%d", TKT_ROOT,
+		(unsigned)pw->pw_uid);
+    }
+    krbtkfile_env = tkt_location;
+    krb_set_tkt_string(tkt_location);
+
+    kerror = krb_get_pw_in_tkt(pw->pw_name, instance,
+			       realm, KRB_TICKET_GRANTING_TICKET, realm,
+			       DEFAULT_TKT_LIFE, password);
+
+    /*
+     * If we got a TGT, get a local "rcmd" ticket and check it so as to
+     * ensure that we are not talking to a bogus Kerberos server.
+     *
+     * There are 2 cases where we still allow a login:
+     *	1: the VERIFY_SERVICE doesn't exist in the KDC
+     *	2: local host has no srvtab, as (hopefully) indicated by a
+     *	   return value of RD_AP_UNDEC from krb_rd_req().
+     */
+    if (kerror != INTK_OK) {
+	if (kerror != INTK_BADPW && kerror != KDC_PR_UNKNOWN) {
+	    syslog(LOG_ERR, "Kerberos intkt error: %s",
+		   krb_get_err_text(kerror));
+	    dest_tkt();
+	}
+	return (1);
+    }
+
+    if (chown(TKT_FILE, pw->pw_uid, pw->pw_gid) < 0)
+	syslog(LOG_ERR, "chown tkfile (%s): %m", TKT_FILE);
+
+    strncpy(savehost, krb_get_phost(localhost), sizeof(savehost));
+    savehost[sizeof(savehost)-1] = '\0';
+
+#ifdef KLOGIN_PARANOID
+    /*
+     * if the "VERIFY_SERVICE" doesn't exist in the KDC for this host,
+     * don't allow kerberos login, also log the error condition.
+     */
+
+    kerror = krb_mk_req(&ticket, VERIFY_SERVICE, savehost, realm, 33);
+    if (kerror == KDC_PR_UNKNOWN) {
+	syslog(LOG_NOTICE,
+	       "warning: TGT not verified (%s); %s.%s not registered, or srvtab is wrong?",
+	       krb_get_err_text(kerror), VERIFY_SERVICE, savehost);
+	notickets = 0;
+	return (1);
+    }
+
+    if (kerror != KSUCCESS) {
+	warnx("unable to use TGT: (%s)", krb_get_err_text(kerror));
+	syslog(LOG_NOTICE, "unable to use TGT: (%s)",
+	       krb_get_err_text(kerror));
+	dest_tkt();
+	return (1);
+    }
+
+    if (!(hp = gethostbyname(localhost))) {
+	syslog(LOG_ERR, "couldn't get local host address");
+	dest_tkt();
+	return (1);
+    }
+
+    memcpy(&faddr, hp->h_addr, sizeof(faddr));
+
+    kerror = krb_rd_req(&ticket, VERIFY_SERVICE, savehost, faddr,
+			&authdata, "");
+
+    if (kerror == KSUCCESS) {
+	notickets = 0;
+	return (0);
+    }
+
+    /* undecipherable: probably didn't have a srvtab on the local host */
+    if (kerror == RD_AP_UNDEC) {
+	syslog(LOG_NOTICE, "krb_rd_req: (%s)\n", krb_get_err_text(kerror));
+	dest_tkt();
+	return (1);
+    }
+    /* failed for some other reason */
+    warnx("unable to verify %s ticket: (%s)", VERIFY_SERVICE,
+	  krb_get_err_text(kerror));
+    syslog(LOG_NOTICE, "couldn't verify %s ticket: %s", VERIFY_SERVICE,
+	   krb_get_err_text(kerror));
+    dest_tkt();
+    return (1);
+#else
+    notickets = 0;
+    return (0);
+#endif
+}
+#endif