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Add ElligatorSwift key creation and ECDH logic

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Co-authored-by: Dhruv Mehta <856960+dhruv@users.noreply.github.com>
This commit is contained in:
Pieter Wuille
2023-04-17 14:25:41 -04:00
parent 42239f8390
commit eff72a0dff
5 changed files with 102 additions and 0 deletions
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15
src/pubkey.cpp
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@@ -7,6 +7,7 @@
#include <hash.h>
#include <secp256k1.h>
#include <secp256k1_ellswift.h>
#include <secp256k1_extrakeys.h>
#include <secp256k1_recovery.h>
#include <secp256k1_schnorrsig.h>
@@ -335,6 +336,20 @@ bool CPubKey::Derive(CPubKey& pubkeyChild, ChainCode &ccChild, unsigned int nChi
return true;
}
CPubKey EllSwiftPubKey::Decode() const
{
secp256k1_pubkey pubkey;
secp256k1_ellswift_decode(secp256k1_context_static, &pubkey, UCharCast(m_pubkey.data()));
size_t sz = CPubKey::COMPRESSED_SIZE;
std::array<uint8_t, CPubKey::COMPRESSED_SIZE> vch_bytes;
secp256k1_ec_pubkey_serialize(secp256k1_context_static, vch_bytes.data(), &sz, &pubkey, SECP256K1_EC_COMPRESSED);
assert(sz == vch_bytes.size());
return CPubKey{vch_bytes.begin(), vch_bytes.end()};
}
void CExtPubKey::Encode(unsigned char code[BIP32_EXTKEY_SIZE]) const {
code[0] = nDepth;
memcpy(code+1, vchFingerprint, 4);