github.com/core-coin/go-core/v2@v2.1.9/crypto/crypto_cgo.go (about)

     1  // Copyright 2023 by the Authors
     2  // This file is part of the go-core library.
     3  //
     4  // The go-core library is free software: you can redistribute it and/or modify
     5  // it under the terms of the GNU Lesser General Public License as published by
     6  // the Free Software Foundation, either version 3 of the License, or
     7  // (at your option) any later version.
     8  //
     9  // The go-core library is distributed in the hope that it will be useful,
    10  // but WITHOUT ANY WARRANTY; without even the implied warranty of
    11  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    12  // GNU Lesser General Public License for more details.
    13  //
    14  // You should have received a copy of the GNU Lesser General Public License
    15  // along with the go-core library. If not, see <http://www.gnu.org/licenses/>.
    16  
    17  //go:build !nacl && !js && cgo && !android && !ios && !mobile
    18  
    19  package crypto
    20  
    21  import (
    22  	"io"
    23  
    24  	"github.com/core-coin/go-goldilocks"
    25  )
    26  
    27  func GenerateKey(read io.Reader) (*PrivateKey, error) {
    28  	key, err := goldilocks.Ed448GenerateKey(read)
    29  	if err != nil {
    30  		return nil, err
    31  	}
    32  	return UnmarshalPrivateKey(key[:])
    33  
    34  }
    35  
    36  func DerivePublicKey(priv *PrivateKey) *PublicKey {
    37  	key := goldilocks.Ed448DerivePublicKey(goldilocks.BytesToPrivateKey(priv.privateKey[:]))
    38  	pub := PublicKey{}
    39  	copy(pub[:], key[:])
    40  	return &pub
    41  }
    42  
    43  func ComputeSecret(privkey *PrivateKey, pubkey *PublicKey) []byte {
    44  	priv := goldilocks.PrivateKey{}
    45  	pub := goldilocks.PublicKey{}
    46  
    47  	copy(priv[:], privkey.privateKey[:])
    48  	copy(pub[:], pubkey[:])
    49  
    50  	secret := goldilocks.Ed448DeriveSecret(pub, priv)
    51  	return secret[:]
    52  }