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stupid signed arithmetic.

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This commit is contained in:
Thomas Winget 2014-06-06 17:18:57 -04:00
parent 8bc032ed09
commit 537b911af1
1 changed files with 3 additions and 6 deletions
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9
src/crypto/electrum-words.cpp
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@ -54,7 +54,9 @@ namespace crypto
w2 = wordsMap.at(wlist[i*3 + 1]);
w3 = wordsMap.at(wlist[i*3 + 2]);
val = w1 + n * ((w2 - w1) % n) + n * n * ((w3 - w2) % n);
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
}
@ -67,11 +69,6 @@ namespace crypto
wlist_copy += words;
}
std::string back_to_words;
bytes_to_words(dst, back_to_words);
assert(wlist_copy == back_to_words); // sanity check
return true;
}