cipher reorganisiert

1 files changed, 63 insertions, 0 deletions

diff --git a/g10/misc.c b/g10/misc.c
new file mode 100644
index 000000000..7424039bd
--- /dev/null
+++ b/g10/misc.c
@@ -0,0 +1,63 @@
+/* misc.c -  miscellaneous functions
+ *	Copyright (C) 1998 Free Software Foundation, Inc.
+ *
+ * This file is part of GNUPG.
+ *
+ * GNUPG is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * GNUPG is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
+ */
+
+#include <config.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include "util.h"
+#include "main.h"
+
+
+u16
+checksum_u16( unsigned n )
+{
+    u16 a;
+
+    a  = (n >> 8) & 0xff;
+    a |= n & 0xff;
+    return a;
+}
+
+u16
+checksum( byte *p, unsigned n )
+{
+    u16 a;
+
+    for(a=0; n; n-- )
+	a += *p++;
+    return a;
+}
+
+u16
+checksum_mpi( MPI a )
+{
+    u16 csum;
+    byte *buffer;
+    unsigned nbytes;
+
+    buffer = mpi_get_buffer( a, &nbytes, NULL );
+    csum = checksum_u16( mpi_get_nbits(a) );
+    csum += checksum( buffer, nbytes );
+    m_free( buffer );
+    return csum;
+}
+
+