Rename ffmpeg-4.2-fit to ffmpeg-4-fit

trunk/3rdparty/ffmpeg-4-fit/libavutil/sha.h

@@ -0,0 +1,95 @@
+/*
+ * Copyright (C) 2007 Michael Niedermayer <michaelni@gmx.at>
+ *
+ * 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_sha
+ * Public header for SHA-1 & SHA-256 hash function implementations.
+ */
+
+#ifndef AVUTIL_SHA_H
+#define AVUTIL_SHA_H
+
+#include <stddef.h>
+#include <stdint.h>
+
+#include "attributes.h"
+#include "version.h"
+
+/**
+ * @defgroup lavu_sha SHA
+ * @ingroup lavu_hash
+ * SHA-1 and SHA-256 (Secure Hash Algorithm) hash function implementations.
+ *
+ * This module supports the following SHA hash functions:
+ *
+ * - SHA-1: 160 bits
+ * - SHA-224: 224 bits, as a variant of SHA-2
+ * - SHA-256: 256 bits, as a variant of SHA-2
+ *
+ * @see For SHA-384, SHA-512, and variants thereof, see @ref lavu_sha512.
+ *
+ * @{
+ */
+
+extern const int av_sha_size;
+
+struct AVSHA;
+
+/**
+ * Allocate an AVSHA context.
+ */
+struct AVSHA *av_sha_alloc(void);
+
+/**
+ * Initialize SHA-1 or SHA-2 hashing.
+ *
+ * @param context pointer to the function context (of size av_sha_size)
+ * @param bits    number of bits in digest (SHA-1 - 160 bits, SHA-2 224 or 256 bits)
+ * @return        zero if initialization succeeded, -1 otherwise
+ */
+int av_sha_init(struct AVSHA* context, int bits);
+
+/**
+ * Update hash value.
+ *
+ * @param ctx     hash function context
+ * @param data    input data to update hash with
+ * @param len     input data length
+ */
+#if FF_API_CRYPTO_SIZE_T
+void av_sha_update(struct AVSHA *ctx, const uint8_t *data, unsigned int len);
+#else
+void av_sha_update(struct AVSHA *ctx, 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_sha_final(struct AVSHA* context, uint8_t *digest);
+
+/**
+ * @}
+ */
+
+#endif /* AVUTIL_SHA_H */