38 lines
1.2 KiB
C++
38 lines
1.2 KiB
C++
// ignore warnings in this file
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#include "libtorrent/aux_/disable_warnings_push.hpp"
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#include "libtorrent/ed25519.hpp"
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#include "libtorrent/hasher512.hpp"
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#include "ge.h"
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#include "sc.h"
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namespace libtorrent
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{
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void ed25519_sign(unsigned char *signature, const unsigned char *message, std::ptrdiff_t message_len, const unsigned char *public_key, const unsigned char *private_key) {
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ge_p3 R;
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hasher512 hash;
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hash.update({reinterpret_cast<char const*>(private_key) + 32, 32});
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hash.update({reinterpret_cast<char const*>(message), message_len});
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sha512_hash r = hash.final();
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sc_reduce(reinterpret_cast<unsigned char*>(r.data()));
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ge_scalarmult_base(&R, reinterpret_cast<unsigned char*>(r.data()));
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ge_p3_tobytes(signature, &R);
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hash.reset();
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hash.update({reinterpret_cast<char const*>(signature), 32});
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hash.update({reinterpret_cast<char const*>(public_key), 32});
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hash.update({reinterpret_cast<char const*>(message), message_len});
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sha512_hash hram = hash.final();
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sc_reduce(reinterpret_cast<unsigned char*>(hram.data()));
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sc_muladd(signature + 32
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, reinterpret_cast<unsigned char*>(hram.data())
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, private_key
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, reinterpret_cast<unsigned char*>(r.data()));
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}
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}
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