73 lines
2.8 KiB
C++
73 lines
2.8 KiB
C++
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/*
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* Copyright (c) 2015 Cryptonomex, Inc., and contributors.
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*
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* The MIT License
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include <graphene/utilities/key_conversion.hpp>
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#include <fc/crypto/base58.hpp>
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#include <fc/variant.hpp>
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namespace graphene { namespace utilities {
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std::string key_to_wif(const fc::sha256& secret )
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{
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const size_t size_of_data_to_hash = sizeof(secret) + 1;
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const size_t size_of_hash_bytes = 4;
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char data[size_of_data_to_hash + size_of_hash_bytes];
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data[0] = (char)0x80;
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memcpy(&data[1], (char*)&secret, sizeof(secret));
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fc::sha256 digest = fc::sha256::hash(data, size_of_data_to_hash);
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digest = fc::sha256::hash(digest);
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memcpy(data + size_of_data_to_hash, (char*)&digest, size_of_hash_bytes);
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return fc::to_base58(data, sizeof(data));
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}
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std::string key_to_wif(const fc::ecc::private_key& key)
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{
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return key_to_wif( key.get_secret() );
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}
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fc::optional<fc::ecc::private_key> wif_to_key( const std::string& wif_key )
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{
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std::vector<char> wif_bytes;
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try
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{
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wif_bytes = fc::from_base58(wif_key);
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}
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catch (const fc::parse_error_exception&)
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{
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return fc::optional<fc::ecc::private_key>();
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}
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if (wif_bytes.size() < 5)
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return fc::optional<fc::ecc::private_key>();
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std::vector<char> key_bytes(wif_bytes.begin() + 1, wif_bytes.end() - 4);
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fc::ecc::private_key key = fc::variant(key_bytes).as<fc::ecc::private_key>();
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fc::sha256 check = fc::sha256::hash(wif_bytes.data(), wif_bytes.size() - 4);
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fc::sha256 check2 = fc::sha256::hash(check);
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if( memcmp( (char*)&check, wif_bytes.data() + wif_bytes.size() - 4, 4 ) == 0 ||
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memcmp( (char*)&check2, wif_bytes.data() + wif_bytes.size() - 4, 4 ) == 0 )
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return key;
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return fc::optional<fc::ecc::private_key>();
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}
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} } // end namespace graphene::utilities
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