1 files changed, 52 insertions, 0 deletions
diff --git a/lib/ffmpeg/libavutil/des.h b/lib/ffmpeg/libavutil/des.h
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+++ b/lib/ffmpeg/libavutil/des.h
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+/*
+ * 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 AVUTIL_DES_H
+#define AVUTIL_DES_H
+
+#include <stdint.h>
+
+struct AVDES {
+    uint64_t round_keys[3][16];
+    int triple_des;
+};
+
+/**
+ * \brief Initializes an AVDES context.
+ *
+ * \param key_bits must be 64 or 192
+ * \param decrypt 0 for encryption, 1 for decryption
+ */
+int av_des_init(struct AVDES *d, const uint8_t *key, int key_bits, int decrypt);
+
+/**
+ * \brief Encrypts / decrypts using the DES algorithm.
+ *
+ * \param count number of 8 byte blocks
+ * \param dst destination array, can be equal to src, must be 8-byte aligned
+ * \param src source array, can be equal to dst, must be 8-byte aligned, may be NULL
+ * \param iv initialization vector for CBC mode, if NULL then ECB will be used,
+ *           must be 8-byte aligned
+ * \param decrypt 0 for encryption, 1 for decryption
+ */
+void av_des_crypt(struct AVDES *d, uint8_t *dst, const uint8_t *src, int count, uint8_t *iv, int decrypt);
+
+#endif /* AVUTIL_DES_H */