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+/* Declarations of functions and data types used for SHA1 sum
+ library functions.
+ Copyright (C) 2000, 2001, 2003, 2005, 2006 Free Software Foundation, Inc.
+
+ This program is free software; you can redistribute it and/or modify it
+ under the terms of the GNU General Public License as published by the
+ Free Software Foundation; either version 2, or (at your option) any
+ later version.
+
+ This program 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 General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software Foundation,
+ Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
+
+#ifndef _ECLAT_SHA1_H
+# define _ECLAT_SHA1_H 1
+
+# include <stdio.h>
+# include <stdint.h>
+
+/* Rename to avoid name clashes */
+# define sha1_ctx eclat_sha1_ctx
+# define sha1_init_ctx eclat_sha1_init_ctx
+# define sha1_process_block eclat_sha1_process_block
+# define sha1_process_bytes eclat_sha1_process_bytes
+# define sha1_finish_ctx eclat_sha1_finish_ctx
+# define sha1_read_ctx eclat_sha1_read_ctx
+# define sha1_stream eclat_sha1_stream
+# define sha1_buffer eclat_sha1_buffer
+# define sha1_ctx eclat_sha1_ctx
+
+/* Structure to save state of computation between the single steps. */
+struct sha1_ctx
+{
+ uint32_t A;
+ uint32_t B;
+ uint32_t C;
+ uint32_t D;
+ uint32_t E;
+
+ uint32_t total[2];
+ uint32_t buflen;
+ uint32_t buffer[32];
+};
+
+
+/* Initialize structure containing state of computation. */
+extern void sha1_init_ctx (struct sha1_ctx *ctx);
+
+/* Starting with the result of former calls of this function (or the
+ initialization function update the context for the next LEN bytes
+ starting at BUFFER.
+ It is necessary that LEN is a multiple of 64!!! */
+extern void sha1_process_block (const void *buffer, size_t len,
+ struct sha1_ctx *ctx);
+
+/* Starting with the result of former calls of this function (or the
+ initialization function update the context for the next LEN bytes
+ starting at BUFFER.
+ It is NOT required that LEN is a multiple of 64. */
+extern void sha1_process_bytes (const void *buffer, size_t len,
+ struct sha1_ctx *ctx);
+
+/* Process the remaining bytes in the buffer and put result from CTX
+ in first 20 bytes following RESBUF. The result is always in little
+ endian byte order, so that a byte-wise output yields to the wanted
+ ASCII representation of the message digest.
+
+ IMPORTANT: On some systems it is required that RESBUF be correctly
+ aligned for a 32 bits value. */
+extern void *sha1_finish_ctx (struct sha1_ctx *ctx, void *resbuf);
+
+
+/* Put result from CTX in first 20 bytes following RESBUF. The result is
+ always in little endian byte order, so that a byte-wise output yields
+ to the wanted ASCII representation of the message digest.
+
+ IMPORTANT: On some systems it is required that RESBUF is correctly
+ aligned for a 32 bits value. */
+extern void *sha1_read_ctx (const struct sha1_ctx *ctx, void *resbuf);
+
+
+/* Compute SHA1 message digest for bytes read from STREAM. The
+ resulting message digest number will be written into the 20 bytes
+ beginning at RESBLOCK. */
+extern int sha1_stream (FILE *stream, void *resblock);
+
+/* Compute SHA1 message digest for LEN bytes beginning at BUFFER. The
+ result is always in little endian byte order, so that a byte-wise
+ output yields to the wanted ASCII representation of the message
+ digest. */
+extern void *sha1_buffer (const char *buffer, size_t len, void *resblock);
+
+#endif

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