github.com/yinchengtsinghua/golang-Eos-dpos-Ethereum@v0.0.0-20190121132951-92cc4225ed8e/swarm/storage/mru/resource_sign.go (about)

     1  
     2  //此源码被清华学神尹成大魔王专业翻译分析并修改
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     9  //
    10  //
    11  //
    12  //
    13  //
    14  //
    15  //
    16  //
    17  //
    18  //
    19  //
    20  //
    21  //
    22  //
    23  //
    24  
    25  package mru
    26  
    27  import (
    28  	"crypto/ecdsa"
    29  
    30  	"github.com/ethereum/go-ethereum/common"
    31  	"github.com/ethereum/go-ethereum/crypto"
    32  )
    33  
    34  const signatureLength = 65
    35  
    36  //
    37  type Signature [signatureLength]byte
    38  
    39  //
    40  type Signer interface {
    41  	Sign(common.Hash) (Signature, error)
    42  	Address() common.Address
    43  }
    44  
    45  //
    46  //
    47  type GenericSigner struct {
    48  	PrivKey *ecdsa.PrivateKey
    49  	address common.Address
    50  }
    51  
    52  //
    53  func NewGenericSigner(privKey *ecdsa.PrivateKey) *GenericSigner {
    54  	return &GenericSigner{
    55  		PrivKey: privKey,
    56  		address: crypto.PubkeyToAddress(privKey.PublicKey),
    57  	}
    58  }
    59  
    60  //
    61  //
    62  func (s *GenericSigner) Sign(data common.Hash) (signature Signature, err error) {
    63  	signaturebytes, err := crypto.Sign(data.Bytes(), s.PrivKey)
    64  	if err != nil {
    65  		return
    66  	}
    67  	copy(signature[:], signaturebytes)
    68  	return
    69  }
    70  
    71  //
    72  func (s *GenericSigner) Address() common.Address {
    73  	return s.address
    74  }