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Add implementations of PRF_expand calls that obtain esk and rcm.

This commit is contained in:
Sean Bowe 2020-06-17 10:59:48 -06:00
parent 552482a404
commit 6581970d59
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GPG Key ID: 95684257D8F8B031
2 changed files with 18 additions and 0 deletions
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16
src/zcash/prf.cpp
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@ -24,6 +24,22 @@ std::array<unsigned char, 64> PRF_expand(const uint256& sk, unsigned char t)
return res;
}
uint256 PRF_rcm(const uint256& rseed)
{
uint256 rcm;
auto tmp = PRF_expand(rseed, 4);
librustzcash_to_scalar(tmp.data(), rcm.begin());
return rcm;
}
uint256 PRF_esk(const uint256& rseed)
{
uint256 esk;
auto tmp = PRF_expand(rseed, 5);
librustzcash_to_scalar(tmp.data(), esk.begin());
return esk;
}
uint256 PRF_ask(const uint256& sk)
{
uint256 ask;

2
src/zcash/prf.h
View File

@ -22,6 +22,8 @@ uint256 PRF_rho(const uint252& phi, size_t i0, const uint256& h_sig);
uint256 PRF_ask(const uint256& sk);
uint256 PRF_nsk(const uint256& sk);
uint256 PRF_ovk(const uint256& sk);
uint256 PRF_rcm(const uint256& rseed);
uint256 PRF_esk(const uint256& rseed);
std::array<unsigned char, 11> default_diversifier(const uint256& sk);