2G ems initial

include/nettle/sha1.h

@@ -0,0 +1,88 @@
+/* sha1.h
+
+   The sha1 hash function.
+
+   Copyright (C) 2001, 2012 Niels Möller
+
+   This file is part of GNU Nettle.
+
+   GNU Nettle is free software: you can redistribute it and/or
+   modify it under the terms of either:
+
+     * the GNU Lesser General Public License as published by the Free
+       Software Foundation; either version 3 of the License, or (at your
+       option) any later version.
+
+   or
+
+     * the GNU General Public License as published by the Free
+       Software Foundation; either version 2 of the License, or (at your
+       option) any later version.
+
+   or both in parallel, as here.
+
+   GNU Nettle 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 copies of the GNU General Public License and
+   the GNU Lesser General Public License along with this program.  If
+   not, see http://www.gnu.org/licenses/.
+*/
+ 
+#ifndef NETTLE_SHA1_H_INCLUDED
+#define NETTLE_SHA1_H_INCLUDED
+
+#include "nettle-types.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Name mangling */
+#define sha1_init nettle_sha1_init
+#define sha1_update nettle_sha1_update
+#define sha1_digest nettle_sha1_digest
+
+/* SHA1 */
+
+#define SHA1_DIGEST_SIZE 20
+#define SHA1_BLOCK_SIZE 64
+/* For backwards compatibility */
+#define SHA1_DATA_SIZE SHA1_BLOCK_SIZE
+
+/* Digest is kept internally as 5 32-bit words. */
+#define _SHA1_DIGEST_LENGTH 5
+
+struct sha1_ctx
+{
+  uint32_t state[_SHA1_DIGEST_LENGTH];    /* State variables */
+  uint64_t count;                         /* 64-bit block count */
+  uint8_t block[SHA1_BLOCK_SIZE];         /* SHA1 data buffer */
+  unsigned int index;                     /* index into buffer */
+};
+
+void
+sha1_init(struct sha1_ctx *ctx);
+
+void
+sha1_update(struct sha1_ctx *ctx,
+	    size_t length,
+	    const uint8_t *data);
+
+void
+sha1_digest(struct sha1_ctx *ctx,
+	    size_t length,
+	    uint8_t *digest);
+
+/* Internal compression function. STATE points to 5 uint32_t words,
+   and DATA points to 64 bytes of input data, possibly unaligned. */
+void
+_nettle_sha1_compress(uint32_t *state, const uint8_t *data);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* NETTLE_SHA1_H_INCLUDED */