From efee717954e7a54cc3ee7c13f654a2e9197f86d7 Mon Sep 17 00:00:00 2001
From: John Kohl <jtkohl@mit.edu>
Date: Wed, 20 Mar 1991 18:13:35 +0000
Subject: [PATCH] add V5 code

git-svn-id: svn://anonsvn.mit.edu/krb5/trunk@1930 dc483132-0cff-0310-8789-dd5450dbe970
---
 src/appl/popper/pop_pass.c | 67 ++++++++++++++++++++++++++++++++++++++
 src/appl/popper/popper.c   | 10 ++++++
 2 files changed, 77 insertions(+)

diff --git a/src/appl/popper/pop_pass.c b/src/appl/popper/pop_pass.c
index 127dfb65b..b938e45d5 100644
--- a/src/appl/popper/pop_pass.c
+++ b/src/appl/popper/pop_pass.c
@@ -21,8 +21,20 @@ static char SccsId[] = "@(#)pop_pass.c  1.7 7/13/90";
 #include "popper.h"
 
 #ifdef KERBEROS
+#ifdef KRB4
+#ifdef KRB5
+ #error you can only use one of KRB4, KRB5
+#endif
 #include <krb.h>
 extern AUTH_DAT kdata;
+#endif /* KRB4 */
+#ifdef KRB5
+#include <krb5/krb5.h>
+#include <krb5/ext-proto.h>
+#include <com_err.h>
+extern krb5_principal ext_client;
+extern char *client_name;
+#endif /* KRB5 */
 #endif /* KERBEROS */
 
 #ifndef KERBEROS_PASSWD_HACK
@@ -35,8 +47,14 @@ int pop_pass (p)
 POP     *   p;
 {
 #ifdef KERBEROS
+#ifdef KRB4
     char lrealm[REALM_SZ];
     int status; 
+#endif /* KRB4 */
+#ifdef KRB5
+    char *lrealm;
+    krb5_error_code retval;
+#endif /* KRB5 */
 #else
     register struct passwd  *   pw;
     char *crypt();
@@ -44,6 +62,7 @@ POP     *   p;
 
 
 #ifdef KERBEROS
+#ifdef KRB4
     if ((status = krb_get_lrealm(lrealm,1)) == KFAILURE) {
         pop_log(p, POP_WARNING, "%s: (%s.%s@%s) %s", p->client, kdata.pname, 
 		kdata.pinst, kdata.prealm, krb_err_txt[status]);
@@ -80,6 +99,49 @@ POP     *   p;
 	      "Wrong username supplied (%s vs. %s).\n", kdata.pname, 
 		       p->user));
       }
+#endif /* KRB4 */
+#ifdef KRB5
+    if (retval = krb5_get_default_realm(&lrealm)) {
+        pop_log(p, POP_WARNING, "%s: (%s) %s", p->client, client_name,
+		error_message(retval));
+        return(pop_msg(p,POP_FAILURE,
+            "Kerberos error:  \"%s\".", error_message(retval)));
+    }
+
+    if (strncmp(ext_client[0]->data, lrealm, ext_client[0]->length))  {
+         pop_log(p, POP_WARNING, "%s: (%s) realm not accepted.", 
+		 p->client, client_name);
+	 return(pop_msg(p,POP_FAILURE,
+		     "Kerberos realm \"%*s\" not accepted.",
+			ext_client[0]->length, ext_client[0]->data));
+    }
+
+
+    /* only accept one-component names, i.e. realm and name only */
+    if (ext_client[2]) {
+        pop_log(p, POP_WARNING, "%s: (%s) instance not accepted.", 
+		 p->client, client_name);
+        return(pop_msg(p,POP_FAILURE,
+		       "Must use null Kerberos(tm) \"instance\" -  \"%s\" not accepted.",
+		       client_name));
+    }
+
+    /*
+     * be careful! we are assuming that the instance and realm have been
+     * checked already! I used to simply copy the pname into p->user
+     * but this causes too much confusion and assumes p->user will never
+     * change. This makes me feel more comfortable.
+     */
+    if(strncmp(p->user, ext_client[1]->data, ext_client[1]->length))
+      {
+	pop_log(p, POP_WARNING, "%s: auth failed: %s vs %s", 
+		 p->client, client_name, p->user);
+        return(pop_msg(p,POP_FAILURE,
+	      "Wrong username supplied (%*s vs. %s).\n", ext_client[1]->length,
+		       ext_client[1]->data,
+		       p->user));
+      }
+#endif /* KRB5 */
 
     /*  Build the name of the user's maildrop */
     (void)sprintf(p->drop_name,"%s/%s",POP_MAILDIR,p->user);
@@ -143,6 +205,7 @@ POP     *   p;
 
 
 
+#ifdef KRB4
 
 /*
  * Check to see if the user is in the passwd file, if not get a kerberos
@@ -302,4 +365,8 @@ int verify_passwd_hack_hack_hack(p)
     return(POP_SUCCESS);
 }
 
+#endif
+#ifdef KRB5
+ #error: no passwd_hack source for V5.
+#endif
 #endif /* KERBEROS_PASSWD_HACK */
diff --git a/src/appl/popper/popper.c b/src/appl/popper/popper.c
index 4c2130b45..be94f9312 100644
--- a/src/appl/popper/popper.c
+++ b/src/appl/popper/popper.c
@@ -31,7 +31,17 @@ char    **  argv;
 
     /*  Tell the user that we are listenting */
     pop_msg(&p,POP_SUCCESS,
+#ifdef KERBEROS
+#ifdef KRB4
         "UCB Pop server (version %s) with Kerberos (TM) at %s starting.",
+#else
+#ifdef KRB5
+        "UCB Pop server (version %s) with Kerberos (TM) V5 at %s starting.",
+#endif /* KRB5 */
+#endif /* KRB4 */
+#else /* !KERBEROS */
+        "UCB Pop server (version %s) at %s starting.",
+#endif /* KERBEROS */
 	    VERSION,p.myhost);
 
     /*  State loop.  The POP server is always in a particular state in 
-- 
2.26.2