github.com/hellobchain/third_party@v0.0.0-20230331131523-deb0478a2e52/hyperledger/fabric/bccsp/sw/ecdsakey.go (about)

     1  /*
     2  Copyright IBM Corp. 2016 All Rights Reserved.
     3  
     4  Licensed under the Apache License, Version 2.0 (the "License");
     5  you may not use this file except in compliance with the License.
     6  You may obtain a copy of the License at
     7  
     8  		 http://www.apache.org/licenses/LICENSE-2.0
     9  
    10  Unless required by applicable law or agreed to in writing, software
    11  distributed under the License is distributed on an "AS IS" BASIS,
    12  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13  See the License for the specific language governing permissions and
    14  limitations under the License.
    15  */
    16  package sw
    17  
    18  import (
    19  	"crypto/elliptic"
    20  	"errors"
    21  	"fmt"
    22  	"github.com/hellobchain/newcryptosm"
    23  	"github.com/hellobchain/newcryptosm/ecdsa"
    24  	"github.com/hellobchain/newcryptosm/x509"
    25  	"github.com/hellobchain/third_party/hyperledger/fabric/bccsp"
    26  )
    27  
    28  type ecdsaPrivateKey struct {
    29  	privKey *ecdsa.PrivateKey
    30  }
    31  
    32  // Bytes converts this key to its byte representation,
    33  // if this operation is allowed.
    34  func (k *ecdsaPrivateKey) Bytes() ([]byte, error) {
    35  	return nil, errors.New("Not supported.")
    36  }
    37  
    38  // SKI returns the subject key identifier of this key.
    39  func (k *ecdsaPrivateKey) SKI() []byte {
    40  	if k.privKey == nil {
    41  		return nil
    42  	}
    43  
    44  	// Marshall the public key
    45  	raw := elliptic.Marshal(k.privKey.Curve, k.privKey.PublicKey.X, k.privKey.PublicKey.Y)
    46  
    47  	// Hash it
    48  	hash := newcryptosm.SHA256.New()
    49  	if ecdsa.IsSM2(k.privKey.Params()) {
    50  		hash = newcryptosm.SM3.New()
    51  	}
    52  	hash.Write(raw)
    53  	return hash.Sum(nil)
    54  }
    55  
    56  // Symmetric returns true if this key is a symmetric key,
    57  // false if this key is asymmetric
    58  func (k *ecdsaPrivateKey) Symmetric() bool {
    59  	return false
    60  }
    61  
    62  // Private returns true if this key is a private key,
    63  // false otherwise.
    64  func (k *ecdsaPrivateKey) Private() bool {
    65  	return true
    66  }
    67  
    68  // PublicKey returns the corresponding public key part of an asymmetric public/private key pair.
    69  // This method returns an error in symmetric key schemes.
    70  func (k *ecdsaPrivateKey) PublicKey() (bccsp.Key, error) {
    71  	return &ecdsaPublicKey{&k.privKey.PublicKey}, nil
    72  }
    73  
    74  type ecdsaPublicKey struct {
    75  	pubKey *ecdsa.PublicKey
    76  }
    77  
    78  // Bytes converts this key to its byte representation,
    79  // if this operation is allowed.
    80  func (k *ecdsaPublicKey) Bytes() (raw []byte, err error) {
    81  	raw, err = x509.MarshalPKIXPublicKey(k.pubKey)
    82  	if err != nil {
    83  		return nil, fmt.Errorf("Failed marshalling key [%s]", err)
    84  	}
    85  	return
    86  }
    87  
    88  // SKI returns the subject key identifier of this key.
    89  func (k *ecdsaPublicKey) SKI() []byte {
    90  	if k.pubKey == nil {
    91  		return nil
    92  	}
    93  
    94  	// Marshall the public key
    95  	raw := elliptic.Marshal(k.pubKey.Curve, k.pubKey.X, k.pubKey.Y)
    96  
    97  	// Hash it
    98  	hash := newcryptosm.SHA256.New()
    99  	if ecdsa.IsSM2(k.pubKey.Params()) {
   100  		hash = newcryptosm.SM3.New()
   101  	}
   102  	hash.Write(raw)
   103  	return hash.Sum(nil)
   104  }
   105  
   106  // Symmetric returns true if this key is a symmetric key,
   107  // false if this key is asymmetric
   108  func (k *ecdsaPublicKey) Symmetric() bool {
   109  	return false
   110  }
   111  
   112  // Private returns true if this key is a private key,
   113  // false otherwise.
   114  func (k *ecdsaPublicKey) Private() bool {
   115  	return false
   116  }
   117  
   118  // PublicKey returns the corresponding public key part of an asymmetric public/private key pair.
   119  // This method returns an error in symmetric key schemes.
   120  func (k *ecdsaPublicKey) PublicKey() (bccsp.Key, error) {
   121  	return k, nil
   122  }