From 56cf56465857e79e814b1e2d50f13e176170fcb3 Mon Sep 17 00:00:00 2001 From: bigbiff bigbiff Date: Fri, 19 Aug 2016 17:43:45 -0400 Subject: twrpDigest refactor This patch is to refactor twrpDigest using polymorphism and inheritance to use the same call patterns for creating and reading a digest. Now a library. Use SHA2 from libcrypto. SHA2 is default if device has libcrypto. Change string MD5 everywhere to use digest or Digest instead. Updated string tags to digest. Translation will be required. Switch out digest code into a driver class from partitionmanager. SHA2 is better for digest creation due to decreased collision space compared to MD5 and SHA1. See https://en.wikipedia.org/wiki/SHA-2 Change-Id: I74b5546789990b12aa4ce2e389d25f80a3fe213f --- twrpDigest/twrpSHA.hpp | 54 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 54 insertions(+) create mode 100644 twrpDigest/twrpSHA.hpp (limited to 'twrpDigest/twrpSHA.hpp') diff --git a/twrpDigest/twrpSHA.hpp b/twrpDigest/twrpSHA.hpp new file mode 100644 index 000000000..e3899300b --- /dev/null +++ b/twrpDigest/twrpSHA.hpp @@ -0,0 +1,54 @@ +/* + 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 . +*/ +#ifndef __TWRPSHA_H +#define __TWRPSHA_H + +#include +#include "twrpDigest.hpp" + +class twrpSHA256: public twrpDigest { +public: + twrpSHA256(); // Initialize the SHA256 digest for streaming activities only + void init(); // Initialize the SHA256 digest algorithm + +protected: + void update(const unsigned char* stream, size_t len); // Update the SHA256 digest stream + void finalize(); // Finalize the SHA256 digest for computation + std::string return_digest_string(); // Return the digest string computed to the callee + +private: + uint8_t sha256_store[SHA256_DIGEST_LENGTH]; // Initialize the SHA256 digest array that holds the computation + SHA256_CTX sha256_ctx; // Initialize the SHA256 control structure +}; + +class twrpSHA512: public twrpDigest { +public: + twrpSHA512(); // Initialize the SHA512 digest for streaming activities only + void init(); // Initialize the SHA512 digest algorithm + +protected: + void update(const unsigned char* stream, size_t len); // Update the SHA512 digest stream + void finalize(); // Finalize the SHA512 digest for computation + std::string return_digest_string(); // Return the digest string computed to the callee + +private: + uint8_t sha512_store[SHA512_DIGEST_LENGTH]; // Initialize the SHA512 digest array that holds the computation + SHA512_CTX sha512_ctx; // Initialize the SHA512 control structure +}; + +#endif //__TWRPSHA_H -- cgit v1.2.3