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, 530 insertions, 0 deletions

diff --git a/crypto/kerberosIV/slave/kprop.c b/crypto/kerberosIV/slave/kprop.c
new file mode 100644
index 0000000..8901121
--- /dev/null
+++ b/crypto/kerberosIV/slave/kprop.c
@@ -0,0 +1,530 @@
+/*
+
+Copyright 1987, 1988 by the Student Information Processing Board
+	of the Massachusetts Institute of Technology
+
+Permission to use, copy, modify, and distribute this software
+and its documentation for any purpose and without fee is
+hereby granted, provided that the above copyright notice
+appear in all copies and that both that copyright notice and
+this permission notice appear in supporting documentation,
+and that the names of M.I.T. and the M.I.T. S.I.P.B. not be
+used in advertising or publicity pertaining to distribution
+of the software without specific, written prior permission.
+M.I.T. and the M.I.T. S.I.P.B. make no representations about
+the suitability of this software for any purpose.  It is
+provided "as is" without express or implied warranty.
+
+*/
+
+#include "slav_locl.h"
+
+RCSID("$Id: kprop.c,v 1.29 1997/05/25 02:43:54 joda Exp $");
+
+#include "kprop.h"
+
+static char kprop_version[KPROP_PROT_VERSION_LEN] = KPROP_PROT_VERSION;
+
+int     debug = 0;
+
+char    my_realm[REALM_SZ];
+int     princ_data_size = 3 * sizeof(int32_t) + 3 * sizeof(unsigned char);
+short   transfer_mode, net_transfer_mode;
+int force_flag;
+static char ok[] = ".dump_ok";
+
+struct slave_host {
+    u_int32_t  net_addr;
+    char   *name;
+    char   *instance;
+    char   *realm;
+    int	   not_time_yet;
+    int    succeeded;
+    struct slave_host *next;
+};
+
+static
+int get_slaves(struct slave_host **psl, char *file, time_t ok_mtime)
+{
+    FILE   *fin;
+    char    namebuf[128], *inst;
+    char   *pc;
+    struct hostent *host;
+    struct slave_host **th;
+    char    path[256];
+    char   *ppath;
+    struct stat stbuf;
+
+    if ((fin = fopen(file, "r")) == NULL)
+	err (1, "open(%s)", file);
+    strcpy(path, file);
+    if ((ppath = strrchr(path, '/'))) {
+	ppath += 1;
+    } else {
+	ppath = path;
+    }
+    th = psl;
+    while(fgets(namebuf, sizeof(namebuf), fin)){
+	if ((pc = strchr(namebuf, '\n'))) {
+	    *pc = '\0';
+	} else {
+	    if(strlen(namebuf) == sizeof(namebuf) - 1){
+		warnx ("Hostname too long (>= %d chars) in '%s'.",
+		       (int) sizeof(namebuf), file);
+		do{
+		    if(fgets(namebuf, sizeof(namebuf), fin) == NULL)
+			break;
+		}while(strchr(namebuf, '\n') == NULL);
+		continue;
+	    }
+	}
+	if(namebuf[0] == 0 || namebuf[0] == '#')
+	    continue;
+	host = gethostbyname(namebuf);
+	if (host == NULL) {
+	    warnx ("Ignoring host '%s' in '%s': %s", 
+		   namebuf, file,
+#ifdef HAVE_H_ERRNO
+		   hstrerror(h_errno)
+#else
+		   "unknown error"
+#endif
+		   );
+	    continue;
+	}
+	(*th) = (struct slave_host *) malloc(sizeof(struct slave_host));
+	if (!*th)
+	    errx (1, "No memory reading host list from '%s'.",
+		    file);
+	memset(*th, 0, sizeof(struct slave_host));
+	(*th)->name = strdup(namebuf);
+	if ((*th)->name == NULL)
+	    errx (1, "No memory reading host list from '%s'.",
+		  file);
+	/* get kerberos cannonical instance name */
+	inst = krb_get_phost ((*th)->name);
+	(*th)->instance = strdup(inst);
+	if ((*th)->instance == NULL)
+	    errx (1, "No memory reading host list from '%s'.",
+		  file);
+	/* what a concept, slave servers in different realms! */
+	(*th)->realm = my_realm;
+	memcpy(&(*th)->net_addr, host->h_addr, sizeof((*th)->net_addr));
+	(*th)->not_time_yet = 0;
+	(*th)->succeeded = 0;
+	(*th)->next = NULL;
+	strcat(strcpy(ppath, (*th)->name), "-last-prop");
+	if (!force_flag && !stat(path, &stbuf) && stbuf.st_mtime > ok_mtime) {
+	    (*th)->not_time_yet = 1;
+	    (*th)->succeeded = 1;	/* no change since last success */
+	}
+	th = &(*th)->next;
+    }
+    fclose(fin);
+    return (1);
+}
+
+/* The master -> slave protocol looks like this:
+     1) 8 byte version string
+     2) 2 bytes of "transfer mode" (net byte order of course)
+     3) ticket/authentication send by sendauth
+     4) 4 bytes of "block" length (u_int32_t)
+     5) data
+
+     4 and 5 repeat til EOF ...
+*/
+
+static int
+prop_to_slaves(struct slave_host *sl, int fd, char *fslv)
+{
+    u_char buf[KPROP_BUFSIZ];
+    u_char obuf[KPROP_BUFSIZ + 64]; /* leave room for private msg overhead */
+    struct sockaddr_in sin, my_sin;
+    int     i, n, s;
+    struct slave_host *cs;	/* current slave */
+    char   path[256], my_host_name[MaxHostNameLen], *p_my_host_name;
+    char   kprop_service_instance[INST_SZ];
+    char   *pc;
+    u_int32_t cksum;
+    u_int32_t length, nlength;
+    long   kerror;
+    KTEXT_ST     ticket;
+    CREDENTIALS  cred;
+    MSG_DAT msg_dat;
+    static char tkstring[] = "/tmp/kproptktXXXXXX";
+    
+    des_key_schedule session_sched;
+
+    close(mkstemp(tkstring));
+    krb_set_tkt_string(tkstring);
+    
+    memset(&sin, 0, sizeof sin);
+    sin.sin_family = AF_INET;
+    sin.sin_port = k_getportbyname ("krb_prop", "tcp", htons(KPROP_PORT));
+    sin.sin_addr.s_addr = INADDR_ANY;
+
+    strcpy(path, fslv);
+    if ((pc = strrchr(path, '/'))) {
+	pc += 1;
+    } else {
+	pc = path;
+    }
+
+    for (i = 0; i < 5; i++) {	/* try each slave five times max */
+	for (cs = sl; cs; cs = cs->next) {
+	    if (!cs->succeeded) {
+		if ((s = socket(AF_INET, SOCK_STREAM, 0)) < 0)
+		    err (1, "socket");
+		memcpy(&sin.sin_addr, &cs->net_addr, 
+		      sizeof cs->net_addr);
+
+		if (connect(s, (struct sockaddr *) &sin, sizeof sin) < 0) {
+		    warn ("connect(%s)", cs->name);
+		    close(s);
+		    continue;	/*** NEXT SLAVE ***/
+		}
+		
+		/* for krb_mk_{priv, safe} */
+		memset(&my_sin, 0, sizeof my_sin);
+		n = sizeof my_sin;
+		if (getsockname (s, (struct sockaddr *) &my_sin, &n) != 0) {
+		    warn ("getsockname(%s)", cs->name);
+		    close (s);
+		    continue;	/*** NEXT SLAVE ***/
+		}
+		if (n != sizeof (my_sin)) {
+		    warnx ("can't get socketname %s length", cs->name);
+		    close (s);
+		    continue;	/*** NEXT SLAVE ***/
+		}
+		
+		/* Get ticket */
+		kerror = krb_mk_req (&ticket, KPROP_SERVICE_NAME, 
+				     cs->instance, cs->realm, (u_int32_t) 0);
+		/* if ticket has expired try to get a new one, but
+		 * first get a TGT ...
+		 */
+		if (kerror != MK_AP_OK) {
+		    if (k_gethostname (my_host_name, sizeof(my_host_name)) != 0) {
+			warnx ("gethostname(%s): %s",
+			       my_host_name,
+#ifdef HAVE_H_ERRNO
+			       hstrerror(h_errno)
+#else
+			       "unknown error"
+#endif			       
+			       );
+			close (s);
+			break;	/* next one can't work either! */
+		    }
+		    /* get canonical kerberos service instance name */
+		    p_my_host_name = krb_get_phost (my_host_name);
+		    /* copy it to make sure gethostbyname static doesn't
+		     * screw us. */
+		    strcpy (kprop_service_instance, p_my_host_name);
+		    kerror = krb_get_svc_in_tkt (KPROP_SERVICE_NAME, 
+#if 0
+						 kprop_service_instance,
+#else
+						 KRB_MASTER,
+#endif
+						 my_realm,
+						 KRB_TICKET_GRANTING_TICKET,
+						 my_realm,
+						 96,
+						 KPROP_SRVTAB);
+		    if (kerror != INTK_OK) {
+			warnx ("%s: %s.  While getting initial ticket\n",
+			       cs->name, krb_get_err_text(kerror));
+			close (s);
+			goto punt;
+		    }
+		    kerror = krb_mk_req (&ticket, KPROP_SERVICE_NAME, 
+					 cs->instance, cs->realm, (u_int32_t) 0);
+		}
+		if (kerror != MK_AP_OK) {
+		    warnx ("%s: krb_mk_req: %s",
+			   cs->name, krb_get_err_text(kerror));
+		    close (s);
+		    continue;	/*** NEXT SLAVE ***/
+		}		    
+
+		if (write(s, kprop_version, sizeof(kprop_version))
+		    != sizeof(kprop_version)) {
+		    warn ("%s", cs->name);
+		    close (s);
+		    continue;	/*** NEXT SLAVE ***/
+		}
+
+		net_transfer_mode = htons (transfer_mode);
+		if (write(s, &net_transfer_mode, sizeof(net_transfer_mode))
+		    != sizeof(net_transfer_mode)) {
+		    warn ("write(%s)", cs->name);
+		    close (s);
+		    continue;	/*** NEXT SLAVE ***/
+		}
+
+		kerror = krb_get_cred (KPROP_SERVICE_NAME, cs->instance,
+				       cs->realm, &cred);
+		if (kerror != KSUCCESS) {
+		    warnx ("%s: %s.  Getting session key.", 
+			   cs->name, krb_get_err_text(kerror));
+		    close (s);
+		    continue;	/*** NEXT SLAVE ***/
+		}
+#ifdef NOENCRYPTION
+		memset(session_sched, 0, sizeof(session_sched));
+#else
+		if (des_key_sched (&cred.session, session_sched)) {
+		    warnx ("%s: can't make key schedule.",
+			   cs->name);
+		    close (s);
+		    continue;	/*** NEXT SLAVE ***/
+		}
+#endif
+		/* SAFE (quad_cksum) and CLEAR are just not good enough */
+		cksum = 0;
+#ifdef not_working_yet
+		if (transfer_mode != KPROP_TRANSFER_PRIVATE) {
+		    cksum = get_data_checksum(fd, session_sched);
+		    lseek(fd, 0L, 0);
+		}
+		else
+#endif
+           	{
+		    struct stat st;
+		    fstat (fd, &st);
+		    cksum = st.st_size;
+	        }
+		kerror = krb_sendauth(KOPT_DO_MUTUAL,
+				      s,
+				      &ticket,
+				      KPROP_SERVICE_NAME,
+				      cs->instance,
+				      cs->realm,
+				      cksum,
+				      &msg_dat,
+				      &cred,
+				      session_sched,
+				      &my_sin,
+				      &sin,
+				      KPROP_PROT_VERSION);
+		if (kerror != KSUCCESS) {
+		    warnx ("%s: krb_sendauth: %s.",
+			   cs->name, krb_get_err_text(kerror));
+		    close (s);
+		    continue;	/*** NEXT SLAVE ***/
+		}
+
+		lseek(fd, 0L, SEEK_SET); /* Rewind file before rereading it. */
+		while ((n = read(fd, buf, sizeof buf))) {
+		    if (n < 0)
+			err (1, "read");
+		    switch (transfer_mode) {
+		    case KPROP_TRANSFER_PRIVATE:
+		    case KPROP_TRANSFER_SAFE:
+			if (transfer_mode == KPROP_TRANSFER_PRIVATE)
+			    length = krb_mk_priv (buf, obuf, n, 
+						  session_sched, &cred.session,
+						  &my_sin, &sin);
+			else
+			    length = krb_mk_safe (buf, obuf, n,
+						  &cred.session,
+						  &my_sin, &sin);
+			if (length == -1) {
+			    warnx ("%s: %s failed.",
+				   cs->name,
+				   (transfer_mode == KPROP_TRANSFER_PRIVATE) 
+				   ? "krb_rd_priv" : "krb_rd_safe");
+			    close (s);
+			    continue; /*** NEXT SLAVE ***/
+			}
+			nlength = htonl(length);
+			if (write(s, &nlength, sizeof nlength)
+			    != sizeof nlength) {
+			    warn ("write(%s)", cs->name);
+			    close (s);
+			    continue; /*** NEXT SLAVE ***/
+			}
+			if (write(s, obuf, length) != length) {
+			    warn ("write(%s)", cs->name);
+			    close(s);
+			    continue; /*** NEXT SLAVE ***/
+			}
+			break;
+		    case KPROP_TRANSFER_CLEAR:
+			if (write(s, buf, n) != n) {
+			    warn ("write(%s)", cs->name);
+			    close(s);
+			    continue; /*** NEXT SLAVE ***/
+			}
+			break;
+		    }
+		}
+		close(s);
+		cs->succeeded = 1;
+		fprintf(stderr, "%s: success.\n", cs->name);
+		strcat(strcpy(pc, cs->name), "-last-prop");
+		unlink(path);
+		close(creat(path, 0600));
+	    }
+	}
+    }
+punt:
+    
+    dest_tkt();
+    for (cs = sl; cs; cs = cs->next) {
+	if (!cs->succeeded)
+	    return (0);		/* didn't get this slave */
+    }
+    return (1);
+}
+
+static void
+usage()
+{
+    /* already got floc and fslv, what is this? */
+    fprintf(stderr,
+	    "\nUsage: kprop [-force] [-realm realm] [-private"
+#ifdef not_safe_yet
+	    "|-safe|-clear"
+#endif
+	    "] [data_file [slaves_file]]\n\n");
+    exit(1);
+}
+
+
+int
+main(int argc, char **argv)
+{
+    int     fd, i;
+    char   *floc, *floc_ok;
+    char   *fslv;
+    struct stat stbuf, stbuf_ok;
+    time_t   l_init, l_final;
+    char   *pc;
+    int    l_diff;
+    static struct slave_host *slave_host_list = NULL;
+    struct slave_host *sh;
+
+    set_progname (argv[0]);
+
+    transfer_mode = KPROP_TRANSFER_PRIVATE;
+
+    time(&l_init);
+    pc = ctime(&l_init);
+    pc[strlen(pc) - 1] = '\0';
+    printf("\nStart slave propagation: %s\n", pc);
+ 
+    floc = NULL;
+    fslv = NULL;
+
+    if (krb_get_lrealm(my_realm,1) != KSUCCESS)
+      errx (1, "Getting my kerberos realm.  Check krb.conf");
+
+    for (i = 1; i < argc; i++) 
+      switch (argv[i][0]) {
+      case '-':
+	if (strcmp (argv[i], "-private") == 0) 
+	  transfer_mode = KPROP_TRANSFER_PRIVATE;
+#ifdef not_safe_yet
+	else if (strcmp (argv[i], "-safe") == 0) 
+	  transfer_mode = KPROP_TRANSFER_SAFE;
+	else if (strcmp (argv[i], "-clear") == 0) 
+	  transfer_mode = KPROP_TRANSFER_CLEAR;
+#endif
+	else if (strcmp (argv[i], "-realm") == 0) {
+	    i++;
+	    if (i < argc)
+		strcpy(my_realm, argv[i]);
+	    else
+		usage();
+	} else if (strcmp (argv[i], "-force") == 0)
+	    force_flag++;
+	else {
+	    warnx("unknown control argument %s.", argv[i]);
+	    usage ();
+	}
+	break;
+      default:
+	/* positional arguments are marginal at best ... */
+	if (floc == NULL)
+	  floc = argv[i];
+	else {
+	  if (fslv == NULL)
+	    fslv = argv[i];
+	  else 
+	      usage();
+	}
+      }
+    if(floc == NULL)
+	floc = DB_DIR "/slave_dump";
+    if(fslv == NULL)
+	fslv = DB_DIR "/slaves";
+	
+    asprintf (&floc_ok, "%s%s", floc, ok);
+    if (floc_ok == NULL)
+	errx (1, "out of memory in copying %s", floc);
+
+    if ((fd = open(floc, O_RDONLY)) < 0)
+	err (1, "open(%s)", floc);
+    if (k_flock(fd, K_LOCK_SH | K_LOCK_NB))
+	err (1, "flock(%s)", floc);
+    if (stat(floc, &stbuf))
+	err (1, "stat(%s)", floc);
+    if (stat(floc_ok, &stbuf_ok))
+	err (1, "stat(%s)", floc_ok);
+    if (stbuf.st_mtime > stbuf_ok.st_mtime)
+	errx (1, "'%s' more recent than '%s'.", floc, floc_ok);
+    if (!get_slaves(&slave_host_list, fslv, stbuf_ok.st_mtime))
+	errx (1, "can't read slave host file '%s'.", fslv);
+#ifdef KPROP_DBG
+    {
+	struct slave_host *sh;
+	int     i;
+	fprintf(stderr, "\n\n");
+	fflush(stderr);
+	for (sh = slave_host_list; sh; sh = sh->next) {
+	    fprintf(stderr, "slave %d: %s, %s", i++, sh->name,
+		    inet_ntoa(sh->net_addr));
+	    fflush(stderr);
+	}
+    }
+#endif				/* KPROP_DBG */
+
+    if (!prop_to_slaves(slave_host_list, fd, fslv))
+	errx (1, "propagation failed.");
+    if (k_flock(fd, K_LOCK_UN))
+	err (1, "flock(%s, LOCK_UN)", floc);
+    fprintf(stderr, "\n\n");
+    for (sh = slave_host_list; sh; sh = sh->next) {
+	fprintf(stderr, "%s:\t\t%s\n", sh->name,
+		(sh->not_time_yet? "Not time yet" : (sh->succeeded ? "Succeeded" : "FAILED")));
+    }
+
+    time(&l_final);
+    l_diff = l_final - l_init;
+    printf("propagation finished, %d:%02d:%02d elapsed\n",
+	   l_diff / 3600, (l_diff % 3600) / 60, l_diff % 60);
+
+    exit(0);
+}
+
+#ifdef doesnt_work_yet
+u_long get_data_checksum(fd, key_sched)
+     int fd;
+     des_key_schedule key_sched;
+{
+	u_int32_t cksum = 0;
+	int n;
+	char buf[BUFSIZ];
+	u_int32_t obuf[2];
+
+	while (n = read(fd, buf, sizeof buf)) {
+	    if (n < 0)
+		err (1, "read");
+	    cksum = cbc_cksum(buf, obuf, n, key_sched, key_sched);
+	}
+	return cksum;
+}
+#endif