Kernel subset

Add a directory containing a "kernel subset" (context import and
message functions only) of the gss-krb5 library, with a test framework
to exercise the functionality and indicate when unknown dependencies
creep in.

ticket: 6909

git-svn-id: svn://anonsvn.mit.edu/krb5/trunk@24921 dc483132-0cff-0310-8789-dd5450dbe970

1 files changed, 84 insertions, 0 deletions

diff --git a/src/util/gss-kernel-lib/t_kgss_common.c b/src/util/gss-kernel-lib/t_kgss_common.c
new file mode 100644
index 0000000000..1b31634c24
--- /dev/null
+++ b/src/util/gss-kernel-lib/t_kgss_common.c
@@ -0,0 +1,84 @@
+/* -*- mode: c; c-basic-offset: 4; indent-tabs-mode: nil -*- */
+/* util/gss-kernel-lib/t_kgss_common.c - Common functions for tests */
+/*
+ * Copyright (C) 2011 by the Massachusetts Institute of Technology.
+ * All rights reserved.
+ *
+ * Export of this software from the United States of America may
+ *   require a specific license from the United States Government.
+ *   It is the responsibility of any person or organization contemplating
+ *   export to obtain such a license before exporting.
+ *
+ * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
+ * distribute this software and its documentation for any purpose and
+ * without fee is hereby granted, provided that the above copyright
+ * notice appear in all copies and that both that copyright notice and
+ * this permission notice appear in supporting documentation, and that
+ * the name of M.I.T. not be used in advertising or publicity pertaining
+ * to distribution of the software without specific, written prior
+ * permission.  Furthermore if you modify this software you must label
+ * your software as modified software and not distribute it in such a
+ * fashion that it might be confused with the original M.I.T. software.
+ * M.I.T. makes no representations about the suitability of
+ * this software for any purpose.  It is provided "as is" without express
+ * or implied warranty.
+ */
+
+#include "k5-int.h"
+#include <unistd.h>
+#include <gssapi/gssapi_krb5.h>
+
+/* Write len bytes of data to fd, aborting on failure. */
+void
+rewrite(int fd, const void *data, size_t len)
+{
+    ssize_t r;
+
+    while (len > 0) {
+        r = write(fd, data, len);
+        if (r == -1 && errno == EINTR)
+            continue;
+        assert(r > 0);
+        data = (char *)data +r;
+        len -= r;
+    }
+}
+
+/* Read len bytes into buf from fd, aborting on failure. */
+void
+reread(int fd, void *buf, size_t len)
+{
+    ssize_t r;
+
+    while (len > 0) {
+        r = read(fd, buf, len);
+        if (r == -1 && errno == EINTR)
+            continue;
+        assert(r > 0);
+        buf = (char *)buf + r;
+        len -= r;
+    }
+}
+
+/* Send a data packet to fd using a machine-dependent length/value encoding. */
+void
+send_data(int fd, const void *data, size_t len)
+{
+    rewrite(fd, &len, sizeof(len));
+    rewrite(fd, data, len);
+}
+
+/* Read a packet from fd into an allocated buffer. */
+void
+read_data(int fd, void **data_out, size_t *len_out)
+{
+    size_t len;
+    void *data;
+
+    reread(fd, &len, sizeof(len));
+    data = malloc(len);
+    assert(data != NULL);
+    reread(fd, data, len);
+    *data_out = data;
+    *len_out = len;
+}