github.com/igggame/nebulas-go@v2.1.0+incompatible/core/crypto.go (about)

     1  // Copyright (C) 2017 go-nebulas authors
     2  //
     3  // This file is part of the go-nebulas library.
     4  //
     5  // the go-nebulas library is free software: you can redistribute it and/or modify
     6  // it under the terms of the GNU General Public License as published by
     7  // the Free Software Foundation, either version 3 of the License, or
     8  // (at your option) any later version.
     9  //
    10  // the go-nebulas library is distributed in the hope that it will be useful,
    11  // but WITHOUT ANY WARRANTY; without even the implied warranty of
    12  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    13  // GNU General Public License for more details.
    14  //
    15  // You should have received a copy of the GNU General Public License
    16  // along with the go-nebulas library.  If not, see <http://www.gnu.org/licenses/>.
    17  //
    18  
    19  package core
    20  
    21  import (
    22  	"github.com/nebulasio/go-nebulas/crypto"
    23  	"github.com/nebulasio/go-nebulas/crypto/keystore"
    24  )
    25  
    26  // RecoverSignerFromSignature return address who signs the signature
    27  func RecoverSignerFromSignature(alg keystore.Algorithm, plainText []byte, cipherText []byte) (*Address, error) {
    28  	signature, err := crypto.NewSignature(alg)
    29  	if err != nil {
    30  		return nil, err
    31  	}
    32  	pub, err := signature.RecoverPublic(plainText, cipherText)
    33  	if err != nil {
    34  		return nil, err
    35  	}
    36  	pubdata, err := pub.Encoded()
    37  	if err != nil {
    38  		return nil, err
    39  	}
    40  	addr, err := NewAddressFromPublicKey(pubdata)
    41  	if err != nil {
    42  		return nil, err
    43  	}
    44  	return addr, nil
    45  }