krb5 commit: Properly handle use_master in k5_init_creds_get

[Greg Hudson]

https://github.com/krb5/krb5/commit/a12a5ddb9b932061bad7b83df058c7c6e2e4b044
commit a12a5ddb9b932061bad7b83df058c7c6e2e4b044
Author: Greg Hudson <ghudson at mit.edu>
Date:   Thu May 30 11:39:54 2013 -0400

    Properly handle use_master in k5_init_creds_get
    
    If we make multiple requests in an initial creds exchange, the
    krb5_sendto_kdc call in k5_init_creds_get may flip the use_master
    value from 0 to 1 if it detects that the response was from a master
    KDC.  Don't turn this into a requirement for future requests during
    the same exchange, or we may have trouble following AS referrals.
    Reported by Sumit Bose.
    
    ticket: 7650

 src/lib/krb5/krb/get_in_tkt.c |    6 ++++--
 1 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/lib/krb5/krb/get_in_tkt.c b/src/lib/krb5/krb/get_in_tkt.c
index 20bc689..ff455d3 100644
--- a/src/lib/krb5/krb/get_in_tkt.c
+++ b/src/lib/krb5/krb/get_in_tkt.c
@@ -521,7 +521,7 @@ k5_init_creds_get(krb5_context context, krb5_init_creds_context ctx,
     krb5_data reply;
     krb5_data realm;
     unsigned int flags = 0;
-    int tcp_only = 0;
+    int tcp_only = 0, master = *use_master;
 
     request.length = 0;
     request.data = NULL;
@@ -545,8 +545,9 @@ k5_init_creds_get(krb5_context context, krb5_init_creds_context ctx,
 
         krb5_free_data_contents(context, &reply);
 
+        master = *use_master;
         code = krb5_sendto_kdc(context, &request, &realm,
-                               &reply, use_master, tcp_only);
+                               &reply, &master, tcp_only);
         if (code != 0)
             break;
 
@@ -558,6 +559,7 @@ k5_init_creds_get(krb5_context context, krb5_init_creds_context ctx,
     krb5_free_data_contents(context, &reply);
     krb5_free_data_contents(context, &realm);
 
+    *use_master = master;
     return code;
 }