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fix hash2rct in get_exponent

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wowario 2019-11-01 09:52:11 +03:00
parent b78a40f7a4
commit 17d4fb378e
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1 changed files with 6 additions and 1 deletions
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7
src/ringct/bulletproofs2.cc
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@ -109,7 +109,12 @@ static rct::key get_exponent(const rct::key &base, size_t idx)
{ {
static const std::string salt("bulletproof"); static const std::string salt("bulletproof");
std::string hashed = std::string((const char*)base.bytes, sizeof(base)) + salt + tools::get_varint_data(idx); std::string hashed = std::string((const char*)base.bytes, sizeof(base)) + salt + tools::get_varint_data(idx);
return rct::hashToPoint(rct::hash2rct(crypto::cn_fast_hash(hashed.data(), hashed.size()))); rct::key e;
ge_p3 e_p3;
rct::hash_to_p3(e_p3, rct::hash2rct(crypto::cn_fast_hash(hashed.data(), hashed.size())));
ge_p3_tobytes(e.bytes, &e_p3);
CHECK_AND_ASSERT_THROW_MES(!(e == rct::identity()), "Exponent is point at infinity");
return e;
} }
static void init_exponents() static void init_exponents()