1 files changed, 62 insertions, 0 deletions
diff --git a/src/lib/krb5/os/read_msg.c b/src/lib/krb5/os/read_msg.c
new file mode 100644
index 000000000000..6c80d53bce0e
--- /dev/null
+++ b/src/lib/krb5/os/read_msg.c
@@ -0,0 +1,62 @@
+/* -*- mode: c; c-basic-offset: 4; indent-tabs-mode: nil -*- */
+/* lib/krb5/os/read_msg.c */
+/*
+ * Copyright 1991 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 <errno.h>
+
+krb5_error_code
+krb5_read_message(krb5_context context, krb5_pointer fdp, krb5_data *inbuf)
+{
+    krb5_int32      len;
+    int             len2, ilen;
+    char            *buf = NULL;
+    int             fd = *( (int *) fdp);
+
+    *inbuf = empty_data();
+
+    if ((len2 = krb5_net_read(context, fd, (char *)&len, 4)) != 4)
+        return((len2 < 0) ? errno : ECONNABORTED);
+    len = ntohl(len);
+
+    if ((len & VALID_UINT_BITS) != (krb5_ui_4) len)  /* Overflow size_t??? */
+        return ENOMEM;
+
+    ilen = (int)len;
+    if (ilen) {
+        /*
+         * We may want to include a sanity check here someday....
+         */
+        if (!(buf = malloc(ilen))) {
+            return(ENOMEM);
+        }
+        if ((len2 = krb5_net_read(context, fd, buf, ilen)) != ilen) {
+            free(buf);
+            return((len2 < 0) ? errno : ECONNABORTED);
+        }
+    }
+    *inbuf = make_data(buf, ilen);
+    return(0);
+}