Prepare SHA code to handle SHA-2 as well. For now rename files and functions

and leave av_sha1_* functions for compatibility until next major bump.

Originally committed as revision 19394 to svn://svn.ffmpeg.org/ffmpeg/trunk

1 files changed, 56 insertions, 0 deletions

diff --git a/libavutil/sha.h b/libavutil/sha.h
new file mode 100644
index 0000000000..1b08b42809
--- /dev/null
+++ b/libavutil/sha.h
@@ -0,0 +1,56 @@
+/*
+ * 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
+ */
+
+#ifndef AVUTIL_SHA_H
+#define AVUTIL_SHA_H
+
+#include <stdint.h>
+
+extern const int av_sha_size;
+
+struct AVSHA;
+
+/**
+ * Initializes SHA-1 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);
+
+/**
+ * Updates hash value.
+ *
+ * @param context hash function context
+ * @param data    input data to update hash with
+ * @param len     input data length
+ */
+void av_sha_update(struct AVSHA* context, const uint8_t* data, unsigned int len);
+
+/**
+ * Finishes 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 */