1 files changed, 76 insertions, 0 deletions
diff --git a/kerberosIV/krb/krb_check_auth.c b/kerberosIV/krb/krb_check_auth.c
new file mode 100644
index 00000000000..ddb52d6a9f0
--- /dev/null
+++ b/kerberosIV/krb/krb_check_auth.c
@@ -0,0 +1,76 @@
+/* $KTH: krb_check_auth.c,v 1.4 1997/04/01 08:18:33 joda Exp $ */
+
+/*
+ * 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"
+
+/*
+ *
+ * Receive an mutual-authenticator for a server in `packet', with
+ * `checksum', `session', and `schedule' having the appropriate values
+ * and return the data in `msg_data'.
+ *
+ * Return KSUCCESS if the received checksum is correct.
+ *
+ */
+
+int
+krb_check_auth(KTEXT packet,
+	       u_int32_t checksum,
+	       MSG_DAT *msg_data,
+	       des_cblock *session,
+	       struct des_ks_struct *schedule,
+	       struct sockaddr_in *laddr,
+	       struct sockaddr_in *faddr)
+{
+  int ret;
+  u_int32_t checksum2;
+
+  ret = krb_rd_priv (packet->dat, packet->length, schedule, session, faddr,
+		     laddr, msg_data);
+  if (ret != RD_AP_OK)
+    return ret;
+  if (msg_data->app_length != 4)
+    return KFAILURE;
+  krb_get_int (msg_data->app_data, &checksum2, 4, 0);
+  if (checksum2 == checksum + 1)
+    return KSUCCESS;
+  else
+    return KFAILURE;
+}