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, 215 insertions, 0 deletions

diff --git a/crypto/kerberosIV/lib/krb/mk_req.c b/crypto/kerberosIV/lib/krb/mk_req.c
new file mode 100644
index 0000000..313ea04
--- /dev/null
+++ b/crypto/kerberosIV/lib/krb/mk_req.c
@@ -0,0 +1,215 @@
+/*
+ * Copyright (c) 1995, 1996, 1997 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:
+ * 
+ * 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 Kungliga Tekniska
+ *      Högskolan and its contributors.
+ * 
+ * 4. 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.
+ */
+
+#include "krb_locl.h"
+
+RCSID("$Id: mk_req.c,v 1.17 1997/05/30 17:42:38 bg Exp $");
+
+static int lifetime = 255;	/* But no longer than TGT says. */
+
+
+static void
+build_request(KTEXT req, char *name, char *inst, char *realm, 
+	      u_int32_t checksum)
+{
+    struct timeval tv;
+    unsigned char *p = req->dat;
+    
+    p += krb_put_nir(name, inst, realm, p);
+    
+    p += krb_put_int(checksum, p, 4);
+
+
+    /* Fill in the times on the request id */
+    gettimeofday(&tv, NULL);
+
+    *p++ = tv.tv_usec / 5000; /* 5ms */
+    
+    p += krb_put_int(tv.tv_sec, p, 4);
+
+    /* Fill to a multiple of 8 bytes for DES */
+    req->length = ((p - req->dat + 7)/8) * 8;
+}
+
+
+/*
+ * krb_mk_req takes a text structure in which an authenticator is to
+ * be built, the name of a service, an instance, a realm,
+ * and a checksum.  It then retrieves a ticket for
+ * the desired service and creates an authenticator in the text
+ * structure passed as the first argument.  krb_mk_req returns
+ * KSUCCESS on success and a Kerberos error code on failure.
+ *
+ * The peer procedure on the other end is krb_rd_req.  When making
+ * any changes to this routine it is important to make corresponding
+ * changes to krb_rd_req.
+ *
+ * The authenticator consists of the following:
+ *
+ * authent->dat
+ *
+ * unsigned char	KRB_PROT_VERSION	protocol version no.
+ * unsigned char	AUTH_MSG_APPL_REQUEST	message type
+ * (least significant
+ * bit of above)	HOST_BYTE_ORDER		local byte ordering
+ * unsigned char	kvno from ticket	server's key version
+ * string		realm			server's realm
+ * unsigned char	tl			ticket length
+ * unsigned char	idl			request id length
+ * text			ticket->dat		ticket for server
+ * text			req_id->dat		request id
+ *
+ * The ticket information is retrieved from the ticket cache or
+ * fetched from Kerberos.  The request id (called the "authenticator"
+ * in the papers on Kerberos) contains the following:
+ *
+ * req_id->dat
+ *
+ * string		cr.pname		{name, instance, and
+ * string		cr.pinst		realm of principal
+ * string		myrealm			making this request}
+ * 4 bytes		checksum		checksum argument given
+ * unsigned char	tv_local.tf_usec	time (milliseconds)
+ * 4 bytes		tv_local.tv_sec		time (seconds)
+ *
+ * req_id->length = 3 strings + 3 terminating nulls + 5 bytes for time,
+ *                  all rounded up to multiple of 8.
+ */
+
+int
+krb_mk_req(KTEXT authent, char *service, char *instance, char *realm, 
+	   int32_t checksum)
+{
+    KTEXT_ST req_st;
+    KTEXT req_id = &req_st;
+
+    CREDENTIALS cr;             /* Credentials used by retr */
+    KTEXT ticket = &(cr.ticket_st); /* Pointer to tkt_st */
+    int retval;                 /* Returned by krb_get_cred */
+
+    char myrealm[REALM_SZ];
+
+    unsigned char *p = authent->dat;
+
+    p += krb_put_int(KRB_PROT_VERSION, p, 1);
+    
+    p += krb_put_int(AUTH_MSG_APPL_REQUEST, p, 1);
+    
+    /* Get the ticket and move it into the authenticator */
+    if (krb_ap_req_debug)
+        krb_warning("Realm: %s\n", realm);
+
+    retval = krb_get_cred(service,instance,realm,&cr);
+
+    if (retval == RET_NOTKT) {
+	retval = get_ad_tkt(service, instance, realm, lifetime);
+	if (retval == KSUCCESS)
+	    retval = krb_get_cred(service, instance, realm, &cr);
+    }
+
+    if (retval != KSUCCESS)
+	return retval;
+
+
+    /*
+     * With multi realm ticket files either find a matching TGT or
+     * else use the first TGT for inter-realm authentication.
+     *
+     * In myrealm hold the realm of the principal "owning" the
+     * corresponding ticket-granting-ticket.
+     */
+
+    retval = krb_get_cred(KRB_TICKET_GRANTING_TICKET, realm, realm, 0);
+    if (retval == KSUCCESS)
+      strncpy(myrealm, realm, REALM_SZ);
+    else
+      retval = krb_get_tf_realm(TKT_FILE, myrealm);
+    
+    if (retval != KSUCCESS)
+	return retval;
+    
+    if (krb_ap_req_debug)
+        krb_warning("serv=%s.%s@%s princ=%s.%s@%s\n", service, instance, realm,
+		    cr.pname, cr.pinst, myrealm);
+
+    p += krb_put_int(cr.kvno, p, 1);
+
+    p += krb_put_string(realm, p);
+
+    p += krb_put_int(ticket->length, p, 1);
+
+    build_request(req_id, cr.pname, cr.pinst, myrealm, checksum);
+    
+    encrypt_ktext(req_id, &cr.session, DES_ENCRYPT);
+
+    p += krb_put_int(req_id->length, p, 1);
+
+    memcpy(p, ticket->dat, ticket->length);
+    
+    p += ticket->length;
+    
+    memcpy(p, req_id->dat, req_id->length);
+    
+    p += req_id->length;
+
+    authent->length = p - authent->dat;
+    
+    memset(&cr, 0, sizeof(cr));
+    memset(&req_st, 0, sizeof(req_st));
+
+    if (krb_ap_req_debug)
+        krb_warning("Authent->length = %d\n", authent->length);
+
+    return KSUCCESS;
+}
+
+/* 
+ * krb_set_lifetime sets the default lifetime for additional tickets
+ * obtained via krb_mk_req().
+ * 
+ * It returns the previous value of the default lifetime.
+ */
+
+int
+krb_set_lifetime(int newval)
+{
+    int olife = lifetime;
+
+    lifetime = newval;
+    return(olife);
+}