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+/*
+ * Copyright (C) 2007 Michael Niedermayer <[email protected]>
+ * Copyright (C) 2013 James Almer <[email protected]>
+ *
+ * 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
+ */
+
+/**
+ * @file
+ * @ingroup lavu_sha512
+ * Public header for SHA-512 implementation.
+ */
+
+#ifndef AVUTIL_SHA512_H
+#define AVUTIL_SHA512_H
+
+#include <stddef.h>
+#include <stdint.h>
+
+#include "attributes.h"
+#include "version.h"
+
+/**
+ * @defgroup lavu_sha512 SHA-512
+ * @ingroup lavu_hash
+ * SHA-512 (Secure Hash Algorithm) hash function implementations.
+ *
+ * This module supports the following SHA-2 hash functions:
+ *
+ * - SHA-512/224: 224 bits
+ * - SHA-512/256: 256 bits
+ * - SHA-384: 384 bits
+ * - SHA-512: 512 bits
+ *
+ * @see For SHA-1, SHA-256, and variants thereof, see @ref lavu_sha.
+ *
+ * @{
+ */
+
+extern const int av_sha512_size;
+
+struct AVSHA512;
+
+/**
+ * Allocate an AVSHA512 context.
+ */
+struct AVSHA512 *av_sha512_alloc(void);
+
+/**
+ * Initialize SHA-2 512 hashing.
+ *
+ * @param context pointer to the function context (of size av_sha512_size)
+ * @param bits number of bits in digest (224, 256, 384 or 512 bits)
+ * @return zero if initialization succeeded, -1 otherwise
+ */
+int av_sha512_init(struct AVSHA512* context, int bits);
+
+/**
+ * Update hash value.
+ *
+ * @param context hash function context
+ * @param data input data to update hash with
+ * @param len input data length
+ */
+#if FF_API_CRYPTO_SIZE_T
+void av_sha512_update(struct AVSHA512* context, const uint8_t* data, unsigned int len);
+#else
+void av_sha512_update(struct AVSHA512* context, const uint8_t* data, size_t len);
+#endif
+
+/**
+ * Finish hashing and output digest value.
+ *
+ * @param context hash function context
+ * @param digest buffer where output digest value is stored
+ */
+void av_sha512_final(struct AVSHA512* context, uint8_t *digest);
+
+/**
+ * @}
+ */
+
+#endif /* AVUTIL_SHA512_H */