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crypto sugar improvements

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This commit is contained in:
sowle 2022-07-19 10:28:08 +02:00
parent 3e78dbd595
commit 2f739228b3
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1 changed files with 28 additions and 0 deletions
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28
src/crypto/crypto-sugar.h
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@ -511,6 +511,11 @@ namespace crypto
zero();
}
explicit point_t(const key_image& ki) // can throw std::runtime_error
: point_t(static_cast<const public_key&>(static_cast<const ec_point&>(ki)))
{
}
// as we're using additive notation, zero means identity group element (EC point (0, 1)) here and after
void zero()
{
@ -976,6 +981,11 @@ namespace crypto
m_elements.emplace_back(pk);
}
void add_key_image(const crypto::key_image& ki)
{
m_elements.emplace_back(ki);
}
scalar_t& access_scalar(size_t index)
{
return m_elements[index].scalar;
@ -1004,6 +1014,11 @@ namespace crypto
m_elements.emplace_back(key_image_array[i]);
}
void add_hash(const hash& h)
{
m_elements.emplace_back(h);
}
void add_32_chars(const char(&str32)[32])
{
m_elements.emplace_back(str32);
@ -1019,6 +1034,16 @@ namespace crypto
return scalar_t(hash); // this will reduce to L
}
hash calc_hash_no_reduce(bool clear = true)
{
size_t data_size_bytes = m_elements.size() * sizeof(item_t);
hash result;
crypto::cn_fast_hash(m_elements.data(), data_size_bytes, result);
if (clear)
this->clear();
return result;
}
void assign_calc_hash(scalar_t& result, bool clear = true)
{
static_assert(sizeof result == sizeof(crypto::hash), "size missmatch");
@ -1035,14 +1060,17 @@ namespace crypto
item_t(const scalar_t& scalar) : scalar(scalar) {}
item_t(const crypto::public_key& pk) : pk(pk) {}
item_t(const crypto::key_image& ki) : ki(ki) {}
item_t(const crypto::hash& h) : h(h) {}
item_t(const char(&str32)[32]) { memcpy(c, str32, sizeof c); }
scalar_t scalar;
crypto::public_key pk;
crypto::key_image ki;
crypto::hash h;
char c[32];
};
static_assert(sizeof(item_t::c) == sizeof(item_t::pk), "size missmatch");
static_assert(sizeof(item_t::h) == sizeof(item_t::pk), "size missmatch");
std::vector<item_t> m_elements;
};