Big endian stash file support

Added support for stash files with a consistent endianness (big endian)
so that one can migrate a KDC from a machine with one endianess to
a machine with the other endianess.  Used by Kerberos for Macintosh.

ticket: new

git-svn-id: svn://anonsvn.mit.edu/krb5/trunk@20489 dc483132-0cff-0310-8789-dd5450dbe970

diff --git a/src/lib/kdb/kdb_default.c b/src/lib/kdb/kdb_default.c
index fd95c83793d981973a8ab809a2f101d48561d44b..093bbc4bc8b9c9045fca65622b47347bf19b06b8 100644 (file)
--- a/src/lib/kdb/kdb_default.c
+++ b/src/lib/kdb/kdb_default.c
@@ -30,6 +30,7 @@
 #include <string.h>
 #include <stdio.h>
 #include <errno.h>
+#include <arpa/inet.h>
 
 
 /*
@@ -142,6 +143,7 @@ krb5_def_store_mkey(context, keyfile, mname, key, master_pwd)
     FILE *kf;
     krb5_error_code retval = 0;
     krb5_ui_2 enctype;
+    unsigned long keylength;
     char defkeyfile[MAXPATHLEN+1];
     krb5_data *realm = krb5_princ_realm(context, mname);
 #if HAVE_UMASK
@@ -176,11 +178,17 @@ krb5_def_store_mkey(context, keyfile, mname, key, master_pwd)
        return e;
     }
     set_cloexec_file(kf);
+#if BIG_ENDIAN_MASTER_KEY
+    enctype = htons(key->enctype);
+    keylength = htonl(key->length);
+#else
     enctype = key->enctype;
+    keylength = key->length;
+#endif
     if ((fwrite((krb5_pointer) &enctype,
                2, 1, kf) != 1) ||
-       (fwrite((krb5_pointer) &key->length,
-               sizeof(key->length), 1, kf) != 1) ||
+       (fwrite((krb5_pointer) &keylength,
+               sizeof(keylength), 1, kf) != 1) ||
        (fwrite((krb5_pointer) key->contents,
                sizeof(key->contents[0]), (unsigned) key->length, 
                kf) != key->length)) {
@@ -229,6 +237,10 @@ krb5_db_def_fetch_mkey( krb5_context   context,
        goto errout;
     }
 
+#if BIG_ENDIAN_MASTER_KEY
+    enctype = ntohs(enctype);
+#endif
+
     if (key->enctype == ENCTYPE_UNKNOWN)
        key->enctype = enctype;
     else if (enctype != key->enctype) {
@@ -242,6 +254,10 @@ krb5_db_def_fetch_mkey( krb5_context   context,
        goto errout;
     }
 
+#if BIG_ENDIAN_MASTER_KEY
+    key->length = ntohl(key->length);
+#endif
+    
     if (!key->length || ((int) key->length) < 0) {
        retval = KRB5_KDB_BADSTORED_MKEY;
        goto errout;