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+/*
+ Copyright 2012 to 2017 TeamWin
+ This file is part of TWRP/TeamWin Recovery Project.
+
+ TWRP 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 3 of the License, or
+ (at your option) any later version.
+
+ TWRP 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 TWRP. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef __TWRPDIGEST_H
+#define __TWRPDIGEST_H
+
+class twrpDigest {
+public:
+ twrpDigest() {};
+ virtual ~twrpDigest() {};
+ virtual void init() = 0; // Initialize the digest according to the algorithm
+ virtual void update(const unsigned char* stream, size_t len) = 0; // Update the digest with new data
+ virtual std::string return_digest_string() = 0; // Returns the digest of the file as a string.
+
+protected:
+ virtual void finalize() = 0; // Finalize the digest input for creating the final digest
+ std::string hexify(uint8_t* hash, size_t len); // Take an len bytes and turn it into a hex string
+};
+
+#endif //__TWRPDIGEST_H