Add support for DES en- and decryption.

Originally committed as revision 10810 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavutil/Makefile

@@ -4,6 +4,7 @@ OBJS = adler32.o \
        aes.o \
        base64.o \
        crc.o \
+       des.o \
        fifo.o \
        intfloat_readwrite.o \
        lls.o \

libavutil/des.h

+/*
+ * DES encryption/decryption
+ * Copyright (c) 2007 Reimar Doeffinger
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef FFMPEG_DES_H
+#define FFMPEG_DES_H
+
+uint64_t ff_des_encdec(uint64_t in, uint64_t key, int decrypt);
+
+#endif