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adding canonical flag

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This commit is contained in:
Daniel Larimer 2016-03-11 12:33:33 -05:00
parent e5ca765f15
commit eaa763aff1
2 changed files with 3 additions and 3 deletions
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2
include/fc/crypto/elliptic.hpp
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@ -123,7 +123,7 @@ namespace fc {
fc::sha512 get_shared_secret( const public_key& pub )const;
// signature sign( const fc::sha256& digest )const;
compact_signature sign_compact( const fc::sha256& digest )const;
compact_signature sign_compact( const fc::sha256& digest, bool require_canonical = true )const;
// bool verify( const fc::sha256& digest, const signature& sig );
public_key get_public_key()const;

4
src/crypto/elliptic_impl_priv.cpp
View file

@ -85,7 +85,7 @@ namespace fc { namespace ecc {
return secp256k1_nonce_function_default( nonce32, msg32, key32, *extra, nullptr );
}
compact_signature private_key::sign_compact( const fc::sha256& digest )const
compact_signature private_key::sign_compact( const fc::sha256& digest, bool require_canonical )const
{
FC_ASSERT( my->_key != empty_priv );
compact_signature result;
@ -94,7 +94,7 @@ namespace fc { namespace ecc {
do
{
FC_ASSERT( secp256k1_ecdsa_sign_compact( detail::_get_context(), (unsigned char*) digest.data(), (unsigned char*) result.begin() + 1, (unsigned char*) my->_key.data(), extended_nonce_function, &counter, &recid ));
} while( !public_key::is_canonical( result ) );
} while( require_canonical && !public_key::is_canonical( result ) );
result.begin()[0] = 27 + 4 + recid;
return result;
}