1 files changed, 87 insertions, 0 deletions
diff --git a/lib/md2.h b/lib/md2.h
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+++ b/lib/md2.h
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+/* Declarations of functions and data types used for MD2 sum
+   library functions.
+   Copyright (C) 2000-2001, 2003, 2005, 2008-2023 Free Software Foundation,
+   Inc.
+
+   This file 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.
+
+   This file 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 this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#ifndef MD2_H
+# define MD2_H 1
+
+# include <stdio.h>
+# include <stddef.h>
+
+# ifdef __cplusplus
+extern "C" {
+# endif
+
+# define MD2_DIGEST_SIZE 16
+
+/* Structure to save state of computation between the single steps.  */
+struct md2_ctx
+{
+  unsigned char chksum[16], X[48], buf[16];
+  size_t curlen;
+};
+
+
+/* Initialize structure containing state of computation. */
+extern void md2_init_ctx (struct md2_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 md2_process_block (const void *buffer, size_t len,
+                               struct md2_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 md2_process_bytes (const void *buffer, size_t len,
+                               struct md2_ctx *ctx);
+
+/* Process the remaining bytes in the buffer and put result from CTX
+   in first 16 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.  */
+extern void *md2_finish_ctx (struct md2_ctx *ctx, void *restrict resbuf);
+
+
+/* Put result from CTX in first 16 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.  */
+extern void *md2_read_ctx (const struct md2_ctx *ctx, void *restrict resbuf);
+
+
+/* Compute MD2 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 *md2_buffer (const char *buffer, size_t len,
+                         void *restrict resblock);
+
+
+/* Compute MD2 message digest for bytes read from STREAM.  The
+   resulting message digest number will be written into the 16 bytes
+   beginning at RESBLOCK.  */
+extern int md2_stream (FILE *stream, void *resblock);
+
+
+# ifdef __cplusplus
+}
+# endif
+
+#endif