add PIDigest with SHA and MD series

libs/main/digest/pidigest_sha2_p.h

@@ -0,0 +1,39 @@
+/*
+	PIP - Platform Independent Primitives
+	Digest algorithms
+	Ivan Pelipenko peri4ko@yandex.ru
+
+	This program 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 3 of the License, 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 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 <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef pidigest_sha2_h
+#define pidigest_sha2_h
+
+#include "pibytearray.h"
+
+class SHA2 {
+public:
+	static const uint32_t initial_224[8];
+	static const uint32_t initial_256[8];
+
+	static const uint64_t initial_384[8];
+	static const uint64_t initial_512[8];
+	static const uint64_t initial_512_256[8];
+	static const uint64_t initial_512_224[8];
+
+	static PIByteArray sha2xx(const PIByteArray & in, const uint32_t * initial, int out_bytes);
+	static PIByteArray sha5xx(const PIByteArray & in, const uint64_t * initial, int out_bytes);
+};
+
+#endif