github.com/core-coin/go-core/v2@v2.1.9/crypto/crypto_nocgo.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/ed448"
    25  )
    26  
    27  func GenerateKey(read io.Reader) (*PrivateKey, error) {
    28  	key, err := ed448.Ed448GenerateKey(read)
    29  	if err != nil {
    30  		return nil, err
    31  	}
    32  	return UnmarshalPrivateKey(key[:])
    33  }
    34  
    35  func DerivePublicKey(priv *PrivateKey) *PublicKey {
    36  	key := ed448.Ed448DerivePublicKey(ed448.BytesToPrivateKey(priv.privateKey[:]))
    37  	pub := PublicKey{}
    38  	copy(pub[:], key[:])
    39  	return &pub
    40  }
    41  
    42  func ComputeSecret(privkey *PrivateKey, pubkey *PublicKey) []byte {
    43  	priv := ed448.PrivateKey{}
    44  	pub := ed448.PublicKey{}
    45  
    46  	copy(priv[:], privkey.privateKey[:])
    47  	copy(pub[:], pubkey[:])
    48  
    49  	secret := ed448.Ed448DeriveSecret(pub, priv)
    50  	return secret[:]
    51  }