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, 125 insertions, 0 deletions

diff --git a/crypto/kerberosIV/lib/krb/mk_priv.c b/crypto/kerberosIV/lib/krb/mk_priv.c
new file mode 100644
index 0000000..b6a9cc4
--- /dev/null
+++ b/crypto/kerberosIV/lib/krb/mk_priv.c
@@ -0,0 +1,125 @@
+/*
+ * 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_priv.c,v 1.18 1997/04/01 08:18:37 joda Exp $");
+
+/* application include files */
+#include "lsb_addr_comp.h"
+
+/*
+ * krb_mk_priv() constructs an AUTH_MSG_PRIVATE message.  It takes
+ * some user data "in" of "length" bytes and creates a packet in "out"
+ * consisting of the user data, a timestamp, and the sender's network
+ * address.
+ * The packet is encrypted by pcbc_encrypt(), using the given
+ * "key" and "schedule".
+ * The length of the resulting packet "out" is
+ * returned.
+ *
+ * It is similar to krb_mk_safe() except for the additional key
+ * schedule argument "schedule" and the fact that the data is encrypted
+ * rather than appended with a checksum.  The protocol version is
+ * KRB_PROT_VERSION, defined in "krb.h".
+ *
+ * The "out" packet consists of:
+ *
+ * Size			Variable		Field
+ * ----			--------		-----
+ *
+ * 1 byte		KRB_PROT_VERSION	protocol version number
+ * 1 byte		AUTH_MSG_PRIVATE |	message type plus local
+ *			HOST_BYTE_ORDER		byte order in low bit
+ *
+ * 4 bytes		c_length		length of data
+ * we encrypt from here with pcbc_encrypt
+ * 
+ * 4 bytes		length			length of user data
+ * length		in			user data
+ * 1 byte		msg_time_5ms		timestamp milliseconds
+ * 4 bytes		sender->sin.addr.s_addr	sender's IP address
+ *
+ * 4 bytes		msg_time_sec or		timestamp seconds with
+ *			-msg_time_sec		direction in sign bit
+ *
+ * 0<=n<=7  bytes	pad to 8 byte multiple	zeroes
+ */
+
+int32_t
+krb_mk_priv(void *in, void *out, u_int32_t length, 
+	    struct des_ks_struct *schedule, des_cblock *key, 
+	    struct sockaddr_in *sender, struct sockaddr_in *receiver)
+{
+    unsigned char *p = (unsigned char*)out;
+    unsigned char *cipher;
+
+    struct timeval tv;
+    u_int32_t src_addr;
+    u_int32_t len;
+
+    p += krb_put_int(KRB_PROT_VERSION, p, 1);
+    p += krb_put_int(AUTH_MSG_PRIVATE, p, 1);
+
+    len = 4 + length + 1 + 4 + 4;
+    len = (len + 7) & ~7;
+    p += krb_put_int(len, p, 4);
+    
+    cipher = p;
+
+    p += krb_put_int(length, p, 4);
+    
+    memcpy(p, in, length);
+    p += length;
+    
+    gettimeofday(&tv, NULL);
+
+    *p++ =tv.tv_usec / 5000;
+    
+    src_addr = sender->sin_addr.s_addr;
+    p += krb_put_address(src_addr, p);
+
+    p += krb_put_int(lsb_time(tv.tv_sec, sender, receiver), p, 4);
+    
+    memset(p, 0, 7);
+
+    des_pcbc_encrypt((des_cblock *)cipher, (des_cblock *)cipher,
+		     len, schedule, key, DES_ENCRYPT);
+
+    return  (cipher - (unsigned char*)out) + len;
+}