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Changes for secp256k1

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This commit is contained in:
Vinnie Falco
2017-01-26 15:42:24 -05:00
parent fdff943262
commit e05bf0844d
8 changed files with 363 additions and 41 deletions
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50
src/ripple/protocol/impl/PublicKey.cpp
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@@ -22,6 +22,7 @@
#include <ripple/protocol/digest.h>
#include <ripple/protocol/impl/secp256k1.h>
#include <ripple/basics/contract.h>
#include <ripple/basics/strHex.h>
#include <ripple/beast/core/ByteOrder.h>
#include <boost/multiprecision/cpp_int.hpp>
#include <ed25519-donna/ed25519.h>
@@ -29,6 +30,13 @@
namespace ripple {
std::ostream&
operator<<(std::ostream& os, PublicKey const& pk)
{
os << strHex(pk.data(), pk.size());
return os;
}
using uint264 = boost::multiprecision::number<
boost::multiprecision::cpp_int_backend<
264, 264, boost::multiprecision::signed_magnitude,
@@ -219,17 +227,51 @@ verifyDigest (PublicKey const& publicKey,
{
if (publicKeyType(publicKey) != KeyType::secp256k1)
LogicError("sign: secp256k1 required for digest signing");
auto const canonicality = ecdsaCanonicality(sig);
if (! canonicality)
return false;
if (mustBeFullyCanonical &&
(*canonicality != ECDSACanonicality::fullyCanonical))
return false;
secp256k1_pubkey pubkey_imp;
if(secp256k1_ec_pubkey_parse(
secp256k1Context(),
&pubkey_imp,
reinterpret_cast<unsigned char const*>(
publicKey.data()),
publicKey.size()) != 1)
return false;
secp256k1_ecdsa_signature sig_imp;
if(secp256k1_ecdsa_signature_parse_der(
secp256k1Context(),
&sig_imp,
reinterpret_cast<unsigned char const*>(
sig.data()),
sig.size()) != 1)
return false;
if (*canonicality != ECDSACanonicality::fullyCanonical)
{
secp256k1_ecdsa_signature sig_norm;
if(secp256k1_ecdsa_signature_normalize(
secp256k1Context(),
&sig_norm,
&sig_imp) != 1)
return false;
return secp256k1_ecdsa_verify(
secp256k1Context(),
&sig_norm,
reinterpret_cast<unsigned char const*>(
digest.data()),
&pubkey_imp) == 1;
}
return secp256k1_ecdsa_verify(
secp256k1Context(), secpp(digest.data()),
secpp(sig.data()), sig.size(),
secpp(publicKey.data()), publicKey.size()) == 1;
secp256k1Context(),
&sig_imp,
reinterpret_cast<unsigned char const*>(
digest.data()),
&pubkey_imp) == 1;
}
bool