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Diffstat (limited to 'src/crypto/electrum-words.cpp')
-rw-r--r-- | src/crypto/electrum-words.cpp | 138 |
1 files changed, 0 insertions, 138 deletions
diff --git a/src/crypto/electrum-words.cpp b/src/crypto/electrum-words.cpp deleted file mode 100644 index add71808a..000000000 --- a/src/crypto/electrum-words.cpp +++ /dev/null @@ -1,138 +0,0 @@ -// Copyright (c) 2014, The Monero Project -// -// All rights reserved. -// -// Redistribution and use in source and binary forms, with or without modification, are -// permitted provided that the following conditions are met: -// -// 1. Redistributions of source code must retain the above copyright notice, this list of -// conditions and the following disclaimer. -// -// 2. Redistributions in binary form must reproduce the above copyright notice, this list -// of conditions and the following disclaimer in the documentation and/or other -// materials provided with the distribution. -// -// 3. Neither the name of the copyright holder nor the names of its contributors may be -// used to endorse or promote products derived from this software without specific -// prior written permission. -// -// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY -// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF -// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL -// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, -// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, -// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS -// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, -// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF -// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - -/* - * This file and its header file are for translating Electrum-style word lists - * into their equivalent byte representations for cross-compatibility with - * that method of "backing up" one's wallet keys. - */ - -#include <string> -#include <cassert> -#include <map> -#include <cstdint> -#include <vector> -#include <boost/algorithm/string.hpp> -#include "crypto/crypto.h" // for declaration of crypto::secret_key - -#include "crypto/electrum-words.h" - -namespace crypto -{ - namespace ElectrumWords - { - - /* convert words to bytes, 3 words -> 4 bytes - * returns: - * false if not a multiple of 3 words, or if a words is not in the - * words list - * - * true otherwise - */ - bool words_to_bytes(const std::string& words, crypto::secret_key& dst) - { - int n = NUMWORDS; // hardcoded because this is what electrum uses - - std::vector<std::string> wlist; - - boost::split(wlist, words, boost::is_any_of(" ")); - - // error on non-compliant word list - if (wlist.size() != 12 && wlist.size() != 24) return false; - - for (unsigned int i=0; i < wlist.size() / 3; i++) - { - uint32_t val; - uint32_t w1, w2, w3; - - // verify all three words exist in the word list - if (wordsMap.count(wlist[i*3]) == 0 || - wordsMap.count(wlist[i*3 + 1]) == 0 || - wordsMap.count(wlist[i*3 + 2]) == 0) - { - return false; - } - - w1 = wordsMap.at(wlist[i*3]); - w2 = wordsMap.at(wlist[i*3 + 1]); - w3 = wordsMap.at(wlist[i*3 + 2]); - - val = w1 + n * (((n - w1) + w2) % n) + n * n * (((n - w2) + w3) % n); - - if (!(val % n == w1)) return false; - - memcpy(dst.data + i * 4, &val, 4); // copy 4 bytes to position - } - - std::string wlist_copy = words; - if (wlist.size() == 12) - { - memcpy(dst.data, dst.data + 16, 16); // if electrum 12-word seed, duplicate - wlist_copy += ' '; - wlist_copy += words; - } - - return true; - } - - /* convert bytes to words, 4 bytes-> 3 words - * returns: - * false if wrong number of bytes (shouldn't be possible) - * true otherwise - */ - bool bytes_to_words(const crypto::secret_key& src, std::string& words) - { - int n = NUMWORDS; // hardcoded because this is what electrum uses - - if (sizeof(src.data) % 4 != 0) return false; - - // 8 bytes -> 3 words. 8 digits base 16 -> 3 digits base 1626 - for (unsigned int i=0; i < sizeof(src.data)/4; i++, words += ' ') - { - uint32_t w1, w2, w3; - - uint32_t val; - - memcpy(&val, (src.data) + (i * 4), 4); - - w1 = val % n; - w2 = ((val / n) + w1) % n; - w3 = (((val / n) / n) + w2) % n; - - words += wordsArray[w1]; - words += ' '; - words += wordsArray[w2]; - words += ' '; - words += wordsArray[w3]; - } - return false; - } - - } // namespace ElectrumWords - -} // namespace crypto |