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keys.go
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keys.go
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/*
Copyright IBM Corp. All Rights Reserved.
SPDX-License-Identifier: Apache-2.0
*/
/*
Notice: This file has been modified for Hyperledger Fabric SDK Go usage.
Please review third_party pinning scripts and patches for more details.
*/
package keyutil
import (
"crypto/ecdsa"
"crypto/x509"
"encoding/pem"
"errors"
"fmt"
)
func PrivateKeyToDER(privateKey *ecdsa.PrivateKey) ([]byte, error) {
if privateKey == nil {
return nil, errors.New("invalid ecdsa private key. It must be different from nil")
}
return x509.MarshalECPrivateKey(privateKey)
}
func derToPrivateKey(der []byte) (key interface{}, err error) {
if key, err = x509.ParsePKCS1PrivateKey(der); err == nil {
return key, nil
}
if key, err = x509.ParsePKCS8PrivateKey(der); err == nil {
switch key.(type) {
case *ecdsa.PrivateKey:
return
default:
return nil, errors.New("found unknown private key type in PKCS#8 wrapping")
}
}
if key, err = x509.ParseECPrivateKey(der); err == nil {
return
}
return nil, errors.New("invalid key type. The DER must contain an ecdsa.PrivateKey")
}
func PEMToPrivateKey(raw []byte, pwd []byte) (interface{}, error) {
block, _ := pem.Decode(raw)
if block == nil {
return nil, fmt.Errorf("failed decoding PEM. Block must be different from nil [% x]", raw)
}
// TODO: derive from header the type of the key
if x509.IsEncryptedPEMBlock(block) {
if len(pwd) == 0 {
return nil, errors.New("encrypted Key. Need a password")
}
decrypted, err := x509.DecryptPEMBlock(block, pwd)
if err != nil {
return nil, fmt.Errorf("failed PEM decryption: [%s]", err)
}
key, err := derToPrivateKey(decrypted)
if err != nil {
return nil, err
}
return key, err
}
cert, err := derToPrivateKey(block.Bytes)
if err != nil {
return nil, err
}
return cert, err
}