github.com/myafeier/fabric@v1.0.1-0.20170722181825-3a4b1f2bce86/common/tools/cryptogen/csp/csp.go (about)

     1  /*
     2  Copyright IBM Corp. 2017 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 csp
    17  
    18  import (
    19  	"crypto"
    20  	"crypto/ecdsa"
    21  	"crypto/x509"
    22  
    23  	"github.com/hyperledger/fabric/bccsp"
    24  	"github.com/hyperledger/fabric/bccsp/factory"
    25  	"github.com/hyperledger/fabric/bccsp/signer"
    26  )
    27  
    28  // GeneratePrivateKey creates a private key and stores it in keystorePath
    29  func GeneratePrivateKey(keystorePath string) (bccsp.Key,
    30  	crypto.Signer, error) {
    31  
    32  	var err error
    33  	var priv bccsp.Key
    34  	var s crypto.Signer
    35  
    36  	opts := &factory.FactoryOpts{
    37  		ProviderName: "SW",
    38  		SwOpts: &factory.SwOpts{
    39  			HashFamily: "SHA2",
    40  			SecLevel:   256,
    41  
    42  			FileKeystore: &factory.FileKeystoreOpts{
    43  				KeyStorePath: keystorePath,
    44  			},
    45  		},
    46  	}
    47  	csp, err := factory.GetBCCSPFromOpts(opts)
    48  	if err == nil {
    49  		// generate a key
    50  		priv, err = csp.KeyGen(&bccsp.ECDSAP256KeyGenOpts{Temporary: false})
    51  		if err == nil {
    52  			// create a crypto.Signer
    53  			s, err = signer.New(csp, priv)
    54  		}
    55  	}
    56  	return priv, s, err
    57  }
    58  
    59  func GetECPublicKey(priv bccsp.Key) (*ecdsa.PublicKey, error) {
    60  
    61  	// get the public key
    62  	pubKey, err := priv.PublicKey()
    63  	if err != nil {
    64  		return nil, err
    65  	}
    66  	// marshal to bytes
    67  	pubKeyBytes, err := pubKey.Bytes()
    68  	if err != nil {
    69  		return nil, err
    70  	}
    71  	// unmarshal using pkix
    72  	ecPubKey, err := x509.ParsePKIXPublicKey(pubKeyBytes)
    73  	if err != nil {
    74  		return nil, err
    75  	}
    76  	return ecPubKey.(*ecdsa.PublicKey), nil
    77  }