priv: Create crc32.h.

As crc32 is only needed by SSHv1, build it only with SSHv1.

include/libssh/crc32.h

@@ -0,0 +1,29 @@
+/*
+ * crc32.c - simple CRC32 code
+ *
+ * This file is part of the SSH Library
+ *
+ * Copyright (c) 2005 by Aris Adamantiadis
+ *
+ * The SSH Library 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.
+ *
+ * The SSH Library 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 the SSH Library; see the file COPYING.  If not, write to
+ * the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
+ * MA 02111-1307, USA.
+ */
+
+#ifndef _CRC32_H
+#define _CRC32_H
+
+uint32_t ssh_crc32(const char *buf, uint32_t len);
+
+#endif /* _CRC32_H */

include/libssh/priv.h

@@ -217,10 +217,6 @@ unsigned char *bin_to_base64(const unsigned char *source, int len);
 int compress_buffer(ssh_session session,ssh_buffer buf);
 int decompress_buffer(ssh_session session,ssh_buffer buf, size_t maxlen);
 
-/* crc32.c */
-uint32_t ssh_crc32(const char *buf, uint32_t len);
-
-
 /* match.c */
 int match_hostname(const char *host, const char *pattern, unsigned int len);